Physics High School

## Answers

**Answer 1**

**Answer: The kilogram, symbol kg, is the SI unit of mass.**

**Explanation: It is defined by taking the fixed numerical value of the Planck constant h to be 6.626 070 15 × 10-34 when expressed in the unit J s, which is equal to kg m2 s-1, where the meter and the second are defined in terms of c and ΔνCs.**

**Answer 2**

**Answer: The answer is kilogram (kg)**

**Explanation:**

## Related Questions

Square root of 2.56 without calculator

### Answers

In Maths finding the square root of a number is the opposite of **squaring a number**. The square root of the square of a **positive number **gives the **original number**. The **Square root** of 2.56 is 1.6.

What is square root?

The** square root** of a number can be defined as the factor which we can **multiply** by itself to get that number. The **symbol **used to represent the **square root** is √.

The square root of any number can be found out without using **calculator **by using** long division method**. Here the **square root** of 2.56 is 1.6. Divide, multiply, subtract, bring the next number and repeat. These are the steps of it.

√2.56 = 1.6

The **long division method** of 2.56 is attached here.

To know more about **square root**, visit;

https://brainly.com/question/29775049

#SPJ9

A crane must exert a force of 25000 N to lift a whale shark, the largest fish in the world, into a tank. If the shark’s acceleration equals 1.25 m/s2, what is the shark’s mass?

### Answers

**The force required to lift the whale shark is given as 25000 N, and its acceleration is 1.25 m/s^2. We can use Newton's second law of motion, which states that the force (F) applied on an object is equal to the product of its mass (m) and acceleration (a), i.e. F = ma.**

**Rearranging the equation to solve for the mass, we get:**

**m = F/a**

**Substituting the given values, we get:**

**m = 25000 N / 1.25 m/s^2**

**m = 20000 kg**

**Therefore, the mass of the whale shark is approximately 20,000 kg.**

What is the period of the microwaves with a frequency of 30,000,000,000 Hz?

a.cannot be calculated

b.0

c.a really big number

d.a really small number

### Answers

**Answer:**

The period of a wave is the time it takes for one complete cycle of the wave to occur. It is given by the formula:

Period = 1 / Frequency

where frequency is the number of cycles per second.

Using this formula, we can calculate the period of the microwaves with a frequency of 30,000,000,000 Hz as:

Period = 1 / 30,000,000,000 Hz

Period = 3.33 x 10^-11 seconds

Therefore, the period of the microwaves with a frequency of 30,000,000,000 Hz is a really small number, which is approximately 3.33 x 10^-11 seconds. The answer is (d) a really small number.

**Explanation:**

Mars's moon Phobos is only about 12 km wide. Your weight on Phobos would be

0.001 what it is on Earth. Its escape velocity is 12 m/s. This velocity results in enough

kinetic energy to produce zero PE at infinite distance. You could launch yourself into

orbit around Phobos with a strong, very fast jump. Compare this jumping speed to

escape velocity, and describe what would happen if you jumped at an angle.

### Answers

If you jumped at an angle, it would depend on the angle you jumped at and the speed you jumped at. If you jumped at an **angle **that was greater than the escape velocity of 12 m/s, you would be able to escape.

What is angle ?

An angle is a figure formed by two rays, or line segments, that extend from a common endpoint. It is a measure of the amount of turn between the two rays. The angle is measured in degrees, with a full circle being 360 degrees. Angles can be acute, obtuse, right, reflex, or straight. Acute angles measure less than 90 degrees, whereas obtuse angles measure more than 90 **degrees**. Right angles **measure **exactly 90 degrees, reflex angles are greater than 180 degrees, and straight angles measure exactly 180 degrees.

To learn more about **angle **

https://brainly.com/question/26262923

#SPJ9

What will happen to the brightness of the lamps and the current in a series series circuit if an additional app is added

### Answers

Adding an additional lamp to a **series circuit** will increase the **brightness **of all the lamps in the circuit, and increase the current as well.

A series circuit comprises a path along which the whole **current flows** through each component. A parallel circuit comprises branches so that the current divides and only part of it flows through any branch.A circuit is said to be connected in series when the same current flows through all the components in the circuit. In such circuits, the current has only one path. Let us consider the household decorative string lights as an example of a series circuit.So, series circuits are also called Voltage dividers. For **parallel circuits**, it's the opposite, as voltage will flow the same in each path, the current get's dropped/separated for each path. For that very behaviour, these circuits are also called as Current dividers.

For such more questions on **series circuit:**

brainly.com/question/19865219

#SPJ11

Which of the following statements best describes what happens to the rocket’s trajectory when the angle of

launch is lowered to 45 degrees?

### Answers

This means that the rocket will not reach the same height as it would at a higher launch angle, and it will also cover less **horizontal distance** before hitting the ground.

**What is Trajectory angle?**

Trajectory angle refers to the angle at which an object is launched or thrown relative to the horizontal plane. It is the angle between the initial velocity vector of the object and the **horizontal plane**. In physics and engineering, the trajectory angle is an important parameter that determines the trajectory of a** projectile **or a moving object.

Lowering the angle of launch of a rocket to 45 degrees will result in a shorter and lower trajectory compared to launching the rocket at a higher angle. When the rocket is launched at a lower angle, it will have less** vertical velocity **and more horizontal velocity compared to a rocket launched at a higher angle.

However, launching the rocket at a lower angle can be useful in certain situations where the goal is to cover a shorter distance or to maintain a lower** altitude,** such as in a low-altitude **reconnaissance** mission or in a missile attack where the target is closer.

Learn more about **Trajectory angle** from given link

https://brainly.com/question/29148039

#SPJ1

If an object with a charge of 0.08 C experiences an electric force of 5.0 what is the electric field strength ?

Please show your work this is due today. Giving out brainliest.

### Answers

**Answer:**

The electric field strength 62.5 N/C.

**Explanation:**

The electric force (F) on an object with charge q in an electric field with strength E can be calculated using the formula:

F = qE

Rearranging this formula, we can solve for the electric field strength:

E = F / q

In this case, the object has a charge of q = 0.08 C and experiences an electric force of F = 5.0 N. Substituting these values into the formula, we get:

E = 5.0 N / 0.08 C

E = 62.5 N/C

So, the electric field strength is 62.5 N/C.

Blank provide us with the actual rocks from inside Earth. They are considered blank evidence of

### Answers

**Core samples**** **provide us with the actual rocks from inside Earth. They are considered direct evidence of Earth's interior.

**Rocks** from the interior of the Earth are actually sampled via core samples. These are regarded as concrete proof of the interior of the Earth. Because they take a direct sample of the rocks that make up the **layers** that make up the Earth's surface and core, core samples provide clear proof of what is inside the planet.

Researchers can identify differences in weather **patterns** and climatic changes across time using geological core samples. Also, there may be proof of species, as well as the sedimentary make-up of lake and river beds, for instance. The dynamic character of the Earth's **formation** and how it changes through time are directly demonstrated by core samples. Where there are changes in the composition of the Earth can be determined thanks to seismic waves.

**Seismograms** can be used by geologists to determine the various components of the Earth's internal structure, such as which regions are solid, molten, or made of gases.

To know more about **core samples**, refer:

https://brainly.com/question/11319621

#SPJ4

Correct question is:

________ provide us with the actual rocks from inside Earth. They are considered ________ evidence of

A solid will float in a liquid if it is less dense than the liquid, and sink if it is more dense than the liquid. If the density of seawater is 1.025 g/mL, which types of plastics would definitely float in seawater? JUSTIFY your answer.

### Answers

**Explanation:**

Plastics with a density less than or equal to 1.025 g/mL will float in seawater, while plastics with a density greater than 1.025 g/mL will sink.

Here are some examples of plastic densities:

Polyethylene terephthalate (PET) has a density of approximately 1.38 g/mL, so it will sink in seawater.

Polypropylene (PP) has a density of approximately 0.9 g/mL, so it will float in seawater.

High-density polyethylene (HDPE) has a density of approximately 0.95 g/mL, so it will float in seawater.

Polystyrene (PS) has a density of approximately 1.05 g/mL, so it will sink in seawater.

Based on the above examples, we can see that plastics such as polypropylene and high-density polyethylene will definitely float in seawater, while others such as polyethylene terephthalate and polystyrene will definitely sink. Other types of plastics with densities close to 1.025 g/mL may float or sink depending on their exact density and the conditions of the water, such as temperature and salinity.

A new landowner has a triangular piece of flat land she wishes to fence. Starting at the west corner, she measures the first side to be 80. 0 m long and the next to be 105 m. These sides are represented as displacement vectors a from b. She then correctly calculates the length and orientation of the third side c. What is her result?

### Answers

The length of the third side of the **triangular** piece of land is approximately 125.7 m, and the **angle **between the first and third side is approximately 79.4° .

To find the **length** and orientation of the third side c, we can use the** law of cosines**, which states:

**c² = a² + b² - 2ab cos(C)**

where c is the length of the third side, a and b are the lengths of the first two sides, and C is the angle between sides a and b.

To find the angle C, we can use the** law of sines**, which states:

**sin(C) / c = sin(A) / a = sin(B) / b**

where A and B are the angles opposite sides a and b, respectively.

We can use the given measurements to calculate the values of a, b, and A:

a = 80.0 m

b = 105 m

To find angle A, we can use the **law of cosines**:

**A = cos^-1[(b² + c² - a²) / (2bc)]**

Since the angle between sides a and b is the same as the angle between sides b and c, we can use the same value for angle A and angle C. Therefore:

C = cos^-1[(a² + b² - c²) / (2ab)]

We can rearrange the law of sines to solve for c:

c = (a sin(C)) / sin(A)

Substituting the values we have calculated:

A = cos^-1[(105² + c² - 80²) / (2 x 105 x c)]

C = cos^-1[(80² + 105² - c²) / (2 x 80 x 105)]

c = (80 sin(C)) / sin(A)

Using a **calculator**, we get:

A ≈ 38.4°

C ≈ 79.4°

c ≈ 125.7 m

Therefore, the **length **of the third side and the **angle** between the first and third side is calulated to be 79.4° and 125.7 m (approx.)

Learn more about the **law of cosines** :

https://brainly.com/question/17289163

#SPJ4

what happened to the arctic ocean during the past 40 years

### Answers

**Answer: about half of the sea ice area in the Arctic has been lost.**

**Explanation: The shrinking summer sea ice cover is a visible manifestation of global warming, and affects marine ecosystems, ocean circulation, and potentially weather events further south of the Arctic.**

A 0.14-kilogram baseball is thrown in a straight line at a velocity of 30 m/sec. What is the momentum of the baseball?

### Answers

The** momentum** of the **baseball **will be "* 4.20 kg.m/s*".

Given values are:

**Mass,**

**m** = 0.14 kg

**Velocity,**

**v **= 30 m/s

As we know the** formula**,

→ [tex]Momentum=Mass*Velocity[/tex]

or,

→ [tex]P=mv[/tex]

By substituting the given values, we get

→ [tex]=0.14*30[/tex]

→ [tex]=4.20[/tex] [tex]kg.m/s[/tex]

Thus the above answer is correct.

Learn more about **momentum** here:

https://brainly.com/question/3443288

find a magnitude and direction (the counterclockwise angle with the +x-axis) of a vector that is equal to a+b.

a: magnitude 27m direction 51°

b: magnitude 17m direction -6.5°

c: magnitude 19 m direction 0.0°

d: magnitude 27 m direction 39°

### Answers

**Magnitude** and** direction **of a** vector **that is equal to a+b is **19m** and** 0.0°** resp. Hence the correct option is** C. magnitude 19 m direction 0.0°**

**What is Vector?`**

**Vector **is a **mathematical** **quantity **which has both **magnitude **and **direction.**

Vectors are denoted with usual notation with an **arrow **upon it. for example, Force, Displacement, Velocity and Acceleration etc. are the vectors which has both **magnitude** as well as **direction.**

When two **same vectors** are acting at a point in** two dimension**. The magnitude of **resultant** of this two vectors are given by,

R² = R₁² + R₁² +2R₁R₂cosθ......1

Where θ is the angle between them.

The **direction** of the **resultant vector** of two same vectors is given by the equation,

tanθ = (R₁ sinθ) ÷ (R₁ + R₂cosθ)......2.

In this picture, we have to find **magnitude** and **direction **of vector** A+B, **we have nothing to do with **vector C.**

vector A is at 37° from vertical, means 90-37 = **53°** from positive x direction.

A = 12 m and 53°

B = 15m and 40°

angle between these two vectors are θ= 53+40 = **93°**

magnitude of resultant of this two vectors are A+B which is given by the equation.

putting these values in equ. 1 we get,

R² = 12² + 15² +2(12×15)cos93°

R² = 350.15

R = 18.71 ≅ 19m ( magnitude)

From equation 2

tanα = (12 sin93°) ÷ (12+ 15cos93°)

tanα = 0.8337

α = 39.82° this angle is from vector B

so the angle of resultant from positive x axis is 40-39.82 = 0.17 ≅ 0.0°

Hence C is correct option is **c: magnitude 19 m direction 0.0°**

To know more about **vector** click,

https://brainly.com/question/24256726

**#SPJ9**

Swimming in a pool requires that you push back on the water in order to go

forward.

Newton's 1st Law

Newton's 2nd Law

Newton's 3rd Law

Law of Universal Gravitation

Law of Conservation of Momentum

### Answers

Swimming in a pool requires that you push back on the water in order to go forward is **Newton's 3rd Law.**

What is Newton's 3rd Law?

Newton's 3rd Law, also known as the law of action and reaction, states that for every action, there is an equal and opposite reaction. This means that if an object A exerts a force on object B, then object B will exert an equal and opposite force on object A.

For example, if you push against a wall, the wall will push back on you with the same force in the** opposite direction**. This is because every force is a result of an interaction between two objects, and each object exerts an equal and opposite force on the other.

This **law **is important in understanding how objects interact with each other and is fundamental to many areas of physics, including mechanics, fluid dynamics, and electromagnetism.

Learn more about **Law** at:

https://brainly.com/question/820417

#SPJ1

3. Someone at the third-floor window (12.0 m above the ground) hurls a ball downward at an angle of 45 degrees with a speed of 25 m/s. How fast will the ball be traveling when it strikes the sidewalk below?

### Answers

The ball will be traveling at a** speed** of approximately 18.9 m/s when it strikes the sidewalk below.

**What is Speed?**

It is defined as the **distance** traveled per unit of time, usually expressed in units such as meters per second (m/s), kilometers per hour (km/h), or miles per hour (mph).

The horizontal component of the **velocity** remains constant throughout the motion, and it is given by:

Vx = Vcosθ

where V is the initial velocity of the ball and θ is the angle of projection. In this case, V = 25 m/s and θ = 45°, so:

Vx = 25*cos(45°) = 17.68 m/s

The vertical component of the velocity changes due to the acceleration due to gravity (g = 9.8 m/s^2). At the highest point, the vertical component of the velocity becomes zero, and the ball starts falling downwards. The final velocity (v) of the ball just before hitting the ground can be calculated using the following equation:

v^2 = u^2 + 2as

where u is the initial velocity in the vertical direction, a is the **acceleration **due to** gravity**, s is the distance traveled in the vertical direction, and v is the final velocity.

Initially, the ball is at a height of 12.0 m above the ground, so s = 12.0 m. The initial velocity in the vertical direction (Vy) is given by:

Vy = Vsinθ

where V is the initial velocity of the ball and θ is the** angle of projection. **In this case, V = 25 m/s and θ = 45°, so:

Vy = 25*sin(45°) = 17.68 m/s

When the ball hits the ground, its final velocity in the vertical direction is zero. Therefore, we can write:

v^2 = u^2 + 2as

0 = (17.68)^2 + 2*(-9.8)*12.0 - final velocity^2

final velocity = 18.9 m/s (approx)

Therefore, the ball will be traveling at a speed of approximately 18.9 m/s when it strikes the sidewalk below.

Learn more about **Speed** from given link

https://brainly.com/question/13943409

#SPJ1

In a series-parallel circuit, you can find the total

resistance of the circuit by calculating the resistance of

each parallel section and then adding the series

resistances to these values to obtain a single

resistance. (This class is about cars )

### Answers

If you know the** total current **and voltage across the circuit, then you can find the total resistance using the Ohm's Law, that is : R = V / I.

How is resistance calculated in series-parallel circuit?

In a series-parallel circuit, one can find the total resistance of circuit by calculating** resistance** of each parallel section and then adding reciprocals of these values to obtain total resistance of parallel section. Next, you can add series resistances to this total resistance to obtain single resistance for entire** circuit.**

In series the total resistance is equal to the sum of the resistors. In parallel, inverse of the total resistance is equal to the the sum of the inverse of each individual resistor.

To know more about** series parallel circuit**, refer

https://brainly.com/question/26589211

#SPJ9

**Note**: The question given on the portal is incomplete. Here is the complete question.

**Question**: How is resistance calculated in a series-parallel circuit?

A charge of 100 elementary charges is equivalent to (1) 1. 60 times 10^-21 C (2) 1. 60 times 10^-17 C (3) 6. 25 times 10^16 C (4) 6. 25 times 10^20 C

### Answers

A charge of 100 **elementary charges** is equivalent to (2) 1. 60 times 10^-17 C

What is the charge of one elementary charge?

A single electron or proton's electric charge is referred to as an elementary charge. It is a fundamental physical constant with a magnitude of approximately 1.602 x 10-19 coulombs (C). **Electric charge** is quantized using the elementary charge, which is thought to be the smallest amount of electric charge that can exist in nature. The elementary charge is the same for both particles because protons and electrons have the same and opposite charges. The behaviour of atoms and molecules is greatly influenced by their elementary charge, which also determines their **electronic structure** and affects how they interact with other charged particles in their environment.

To Know more about **elementary charges **Visit:

brainly.com/question/8957365

#SPJ1

Why do some people deny climate change, despite overwhelming evidence to the contrary?

### Answers

Most typically, a person who denies the effects of **climate change **makes decisions based on their emotions, especially those they have toward the things they fear.

Why do some people choose to disregard climate change?

The **psychological **distance is the first. Many people don't consider the possibility of climate change to be serious enough. Its impacts might not be immediately apparent unless you wake up to find your kitchen under water.

Why do people disregard concerns about sustainability?

Depression may result from feeling constantly threatened, or it may result from our **defensive system **activating, forcing us to overlook the issue in order to deal. Dissonance, denial, and identification are three further difficulties cited by **Stoknes**.

To know more about **climate change **visit :-

https://brainly.com/question/15844944

#SPJ1

A roller coaster car that has a mass of 200 kg is travelling at a rate of 10 m/s at a

height of 5 m above Earth's surface. How much total energy does the car contain at

this point?

### Answers

The roller** coaster** car contains a total of **19810 joules **of energy at this point.

How to calculate the total energy of the roller coaster car.

First, we need to consider its **kinetic energy** and** potential energy**.

The potential energy of the car at a height of 5 m above Earth's surface is given by:

PE = m * g * h

Where

m is the mass of the carg is the acceleration due to gravity (9.81 m/s²)h is the height

Substituting the given values, we get:

PE = (200 kg) * (9.81 m/s²) * (5 m)

PE = 9810 J

The kinetic energy of the car is given by:

KE = (1/2) * m * v²

Where v is the velocity of the car.

Substituting the given values, we get:

KE = (1/2) * (200 kg) * (10 m/s)²

KE = 10000 J

Therefore, the total energy of the roller coaster car at this point is:

Total Energy = KE + PE

Total Energy = 10000 J + 9810 J

Total Energy = 19810 J

Therefore, the roller** coaster** car contains a total of **19810 joules **of energy at this point.

Learn more about **kinetic energy** and** potential energy **here : brainly.com/question/18963960

#SPJ1

A roller coaster starts at a high peak with 60 J of gravitational potential energy. When it reaches a second peak, it has only 50 J of potential energy. Calculate the difference in energy and explain what happened to it.

### Answers

**Answer:**

10 J

**Explanation:**

The difference in energy between the two peaks is 10 J.

As the roller coaster moves from the first peak to the second peak, it loses 10 J of gravitational potential energy. This energy is converted into other forms of energy, such as kinetic energy (the energy of motion) and thermal energy (the energy of heat).

Some of the gravitational potential energy is converted into kinetic energy as the roller coaster accelerates down the first peak. As it reaches the second peak, some of the kinetic energy is converted back into gravitational potential energy, but not all of it. The difference between the initial and final potential energy represents the energy that was lost or converted into other forms.

A 1,400-kilogram car is also traveling in a straight line. Its momentum is equal to that of the truck in the previous question. What is the velocity of the car?

### Answers

The **velocity** of the **car** is v = 28.6 m/s.

**Solution:**

v = p/m

v = 40,000 kg x m/s

1,400 kg

v = 28.6 m/s

**Average** **velocity **is a measure of total **displacement **divided by total time. The total displacement is the distance between the start and endpoints. Since the car moves from point A at both the start and end points the total displacement is zero and the average velocity is also zero.

**Velocity** is the **distance** traveled per unit of time, the speed of movement. The speed of a car traveling on a smooth, flat section of a highway without traffic congestion is constant and not zero. Acceleration is the rate of change of velocity. The reason is simple. Velocity is the percentage of time an object moves along a path and Velocity is the speed and direction of an object's movement.

Learn more about** Velocity** here:

https://brainly.com/question/25749514

What is the frequency of a wave that travels through a spring at 2.6 m/s and has a wavelength of 1.3 meters

### Answers

The **frequency** of a** wave **is the speed of the wave divided by its wavelength. The frequency of the wave travelling through at 2.6 m/s with the **wavelength** of 1.3 meters is 2 Hz.

What is frequency ?

**Frequency** of a wave is the number of **wave cycles** travelling per unit time. It is the inverse of the time period thus has the unit of s⁻¹ which is equivalent to the unit Hz.

The frequency of a** wave **is inversely proportional to the wavelength of the wave. The **speed** of the wave is related to its frequency and wavelength as:

c = νλ

given, c = 2.6 m/s

wavelength, λ = 1.3 m.

then, **frequency** ν = c/λ

ν = 2.6 m/s / 1.3 m

= 2 Hz.

Therefore, the **frequency** of the wave is 2 Hz.

Find more on **frequency**:

https://brainly.com/question/3795295

#SPJ1

How does changing the charge’s value influence the force between the two charges?

As the value of charge 1 __________, the value of the force ___________.

decreases; decreases

increases; decreases

increases; does not change

decreases; does not change

### Answers

**Answer:**

the answer is decreases,decreases

HELP ASAP

Discuss how the government uses tax credits, direct payments, and deficiency payments to

subsidize renewable energy.

### Answers

For eligible **renewable energy** technology and projects, a number of tax credits, grants, and loan programmes are offered by the federal government.

Why does the government promote the use of renewable energy sources?

Fossil fuels are burned to produce energy, which produces a sizable amount of **greenhouse gas** emissions that contribute to global warming. Even when taking into account the entire life cycle of the technologies, the majority of renewable energy sources produce negligible to no emissions.

Why are subsidies for renewable energy good?

Subsidies have helped reduce dependency on fossil fuels by expanding the use of renewable energy sources. This is crucial for lowering greenhouse gas emissions and preventing an increase in global **temperatures**.

To know more about **renewable energy **visit:-

brainly.com/question/29792091

#SPJ1

An electron moves in a circular path with a radius of 0. 20 m at a constant speed of 1. 5 X 105 m/s. What is the period of its motion?

### Answers

The **period of motion **of the electron is **2.09 × 10^-6 seconds**.

What is period of motion ?

Period of motion can be defined as the time it takes for an object to complete one **full cycle **of its motion. In the context of circular motion, the period is the time it takes for an object to travel around a full circle and return to its **starting position**.

The period of motion, T, of an object moving in a circle can be calculated using the following formula:

T = 2πr/v

Where

r is the radius of the circle v is the speed of the object

In this case, the electron moves in a circular path with a radius of 0.20 m at a constant speed of 1.5 × 10^5 m/s. Plugging these values into the formula gives:

T = 2π(0.20 m) / (1.5 × 10^5 m/s)

T = 2.09 × 10^-6 s

Therefore, the period of motion of the electron is **2.09 × 10^-6 seconds**.

Learn more about** period of motion **here : brainly.com/question/27193056

#SPJ1

Mallory pushes her water bottle of 1. 70 kg to the side. She applies a force of 108. 20 N to the right. If the bottle accelerates at 8. 79 m/s2, what is the coefficient of friction?

### Answers

Mallory pushes her water bottle of 1. 70 kg to the side. She applies a **force** of 108. 20 N to the right. If the bottle accelerates at 8. 79 m/s2, the **coefficient of friction** is 5.5 .

What is **coefficient of friction?**

The friction coefficient is the ratio of the **normal force** pressing two surfaces together to the** frictional force** preventing motion between them. Typically, it is represented by the Greek letter mu (μ). In terms of math, is equal to [tex]\frac{F}{N}[/tex], where F stands for frictional force and N for normal force. The coefficient of friction has no dimensions because both F and N are measured in units of force (such as newtons ). For both static and kinetic friction, the coefficient of friction has a range of values. When an object experiences **static friction**, the frictional force resists any applied force, causing the object to stay at rest until the static frictional force is removed. The frictional force opposes an object's motion in **kinetic friction**.

According to the equation,

F - f = ma

where,

F is force applied,

f is friction between surfaces,

m is the mass of the water bottle and,

a is the acceleration.

Substituting the values and solving for f,

f = F - ma

f = 108.20 - 14.9

f = 93.3 N

f = μN

where,

μ is the coefficient of friction and,

N is the normal reaction.

substituting the values and solving for μ,

coefficient of friction = 5.5

To know more about **static friction**, visit;

https://brainly.com/question/13000653

#SPJ1

Does a bike have mechanical advantage that is greater than 1, equal to 1, or less than 1?

### Answers

Therefore, if MA is less than 1, output **velocity **would increase while input torque would decrease.

What is the greatest mechanical benefit?

The best performance that can be achieved is the **mechanical advantage**, which is calculated under the presumption that a machine does not lose power through **deflection**, friction, and wear. Because of this, it is frequently referred to as the ideal mechanical advantage (IMA).

What machine has a mechanical advantage that is less than one?

A machine may not always have a greater mechanical advantage than one. This means that a person must exert more force than the machine can support. Machines like class three levers are an example of this. A class three **lever **can only move so much when a person presses on it.

To know more about **velocity **visit :-

https://brainly.com/question/17127206

#SPJ1

a narrow capillary of radius 2cm placed in a liquid was observed to rise to a height of 12cm for water and 5cm for mercury. calculate the coefficient of surface tension for water and mercury of density 1000kg/m^3 and 13,000kg/m^3 use g=9.81 m/s^2

### Answers

The** coefficient** of **surface tension** of water is 29400 N/m and the coefficient of surface tension for the mercury in the **capillary tube** is 159412.5 N/m.

What is surface tension ?

The** surface tension** of a liquid is the force on its surface caused by the particle - particle attraction in the surface layer by the bulk of the liquid which results in the minimization of** surface area**.

The equation connecting the coefficient of surface tension with radius of **capillary**, height and** density** is given as :

γ = ρ g h/2r

For **water** ,

ρ = 1000 kg/m³

h = 12 cm = 0.12 m

r = 2 cm = 0.02 m.

then γ = 1000 kg/m³ × 9.8 m/s² × 0.12 m/ (2 × 0.02 m)

= 29400 N/m.

For **mercury**,

ρ = 13000 kg/m³

h = 5 cm = 0.05m

r = 2 cm = 0.02 m.

then γ = 13000 kg/m³ × 9.8 m/s² × 0.05 m/ (2 × 0.02 m)

= 159412.5 N/m.

Therefore, the coefficient of **surface tension** of water is 29400 N/m and the coefficient of surface tension for the mercury in the capillary tube is 159412.5 N/m.

Find more on **surface tension**:

https://brainly.com/question/28146435

#SPJ1

A circuit is built based on this circuit diagram. A diagram of a closed circuit with a power source on the left labeled 12 V. There are 3 resistors in parallel, separate paths, connected to it labeled 3.0 Ohms, 6.0 Ohms and 9.0 Ohms. What is the equivalent resistance of the circuit? 0.61 Ω 1.6 Ω 7.5 Ω 18 Ω

### Answers

The parallel circuit containing three resistors' equivalent resistance is thus found to be 1.64 **ohms**.

To what end are ohms put?

The electrical **resistance** measured in Ohms is a measure of a conductor's ability to create a current of one amp when a voltage of one volt is applied across its **terminals**.

What does ohm mean?

Ohm defines the "1 Ohm" **measure** of resistance as the distance between two places in a wire where 1 volt would push 1 amp, or 6.241 1018 electrons, when applied. Greek letter "," **sometimes** known as omega and pronounced "ohm," is typically used to denote this value in schematics.

To know more about **ohms** visit:

https://brainly.com/question/1462314

#SPJ1

Answer:

B or 1.6

Explanation:

help please I don't understand

### Answers

The** force line **which shows the force of **gravity **that the Earth exerts on the Moon is line A.

The reason **Line A** is thicker than arrow B is because the Earth exerts a greater force of gravity on the **Moon**.

How to describe the gravity exerted ?

According to Newton's Third Law of Motion, for every action, there is an equal and opposite reaction. Therefore, the **gravitational force **exerted by the **Earth **on the moon is equal in magnitude and opposite in direction to the gravitational force exerted by the moon on the Earth.

The force of gravity between two objects depends on their masses and the distance between them, so the force of gravity between the Earth and moon is proportional to their masses and the distance between them. While the **moon's **gravity does have an impact on the Earth, such as causing ocean tides, it is not a greater force than the Earth's gravity.

Find out more on **gravity **at https://brainly.com/question/13086036

#SPJ1