You decide to start running to get ready for a cross country race. You run 8 miles north and stop to take a small break. You then run 3 miles west before finally running 7 miles south. What is the total distance that you traveled?

Answer:

1. They repel each other

2. They attract each other

3.They have no affect on each other

Explanation:

got em right

The interaction between the objects with same charge is repulsion.

The interaction between the objects with opposite charge is attraction.

There is no interaction between the uncharged objects.

Electrostatic force is defined as the force of attraction or repulsion that happens between two charged particles.

Here,

The interaction between the two charged particles is due to the electrostatic force of attraction or repulsion.

Case-1

Interaction between objects with the same charge.

When two objects with same charge are placed at a distance from each other, the force existing between them is the electrostatic force of repulsion. This is because they are two like charges and we know like charges never attracts each other. So, the interaction between them is repulsion.

Case-2

Interaction between objects with opposite charges.

When two objects with opposite charges are placed at a distance from each other, the force existing between them is the electrostatic force of attraction. This is because, they are two unlike charges and we know unlike charges will always attract each other. So, the interaction between them is attraction.

Case-2

Interaction between uncharged objects

When two uncharged objects are placed at a distance from each other, there will be o force of attraction or repulsion between them. This is because the electrostatic force acts between two particles that have charge. So, there is no interaction between the uncharged objects.

Hence,

The interaction between the objects with same charge is repulsion.

The interaction between the objects with opposite charge is attraction.

There is no interaction between the uncharged objects.

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If the source moves away from you faster than the speed of sound in air, the frequency that you hear is lower than f.

Explanation:

This phenomenon is known as the Doppler effect.

The Doppler effect describes the change in frequency of a wave (such as sound or light) when there is relative motion between the source of the wave and the observer.

When the source moves away from the observer, the effective wavelength of the sound waves gets longer, resulting in a lower frequency being perceived by the observer.

This decrease in frequency causes the sound to be heard at a lower pitch.

Therefore, the correct answer is b. lower than f.

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Answer:

F = 70000  N

Explanation:

Given that,

Mass of a car, m = 1400 kg

Initial speed of the car, u = 15 m/s

Finally, it hits the ground, v = 0

Time, t= 0.3 s

We need to find the force experienced by the car. Using Newton's second law of motion to find it.

F = ma

a is acceleration of the car.

\(F=\dfrac{m(v-u)}{t}\\\\F=\dfrac{1400\times (0-15)}{0.3}\\\\=-70000\ N\)

So, the force experienced by the car has a magnitude of 70000  N.

Therefore, approximately 19,739 turns per centimeter must be wound on the solenoid to produce a magnetic field of 0.5 Tesla within it.

To determine the number of turns per centimeter needed to produce a magnetic field within a solenoid, we can use the formula:

B = μ₀ * n * I

Where B is the magnetic field, μ₀ is the permeability of free space (4π x 10⁻⁷ T*m/A), n is the number of turns per meter, and I is the current in amperes.

To find the number of turns per centimeter, we need to convert the length units. There are 100 centimeters in a meter, so we divide the number of turns per meter by 100.

Let's assume we want a magnetic field of 0.5 Tesla (T) within the solenoid and the current is 2.0 A.

Using the formula, we have:

0.5 T = (4π x 10⁻⁷ T*m/A) * (n/100 turns/cm) * 2.0 A

Simplifying the equation, we can solve for n:

0.5 T = (8π x 10⁻⁷ T*m/A) * (n/100 turns/cm)

n = (0.5 T * 100 turns/cm) / (8π x 10⁻⁷ T*m/A)

Calculating this, we find:

n ≈ 19,739 turns/cm

In conclusion, to achieve a specific magnetic field within a solenoid, the number of turns per centimeter can be determined using the formula B = μ₀ * n * I.

By substituting the given values and solving the equation, we find that around 19,739 turns per centimeter are needed for a magnetic field of 0.5 Tesla with a current of 2.0 A.

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The changes in the momentum of the ball and the time over which that change occurs. The formula for average force is: average force = change in momentum/time.

Given: The ball's mass is 0.144 kilogram.

speed v = 38 m/s, shift in momentum presently

P = m v- ( - mv) ( - mv)= 2 mv

=2 x (0.144) x (38) (38)

= 10.944 kg-m/s

t Impulse J=F.

The impulse is equivalent to the change in momentum.

J = 10.944 kg-m/s

Think about how a baseball bat and a ball interact, for instance. The bat forces the ball to the right while the baseball forces the bat to the left. The action-reaction force pair is made up of these two forces acting on two different objects combined.

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Pitch a baseball horizontally at 38.0 m/s weighing 0.144 kg. The baseball moves in the opposite direction and at the same speed after being struck by the bat. What is the ball's change in momentum? What kind of impetus does the bat deliver? What was the average force the bat applied to the ball during the 0.80 milliseconds that they were in contact?

Answer:

Acceleration = -3m/s²

Explanation:

Given the following data;

Initial velocity = 19m/s

Final velocity = 3m/s

Time = 2secs

To find the acceleration;

In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.

This simply means that, acceleration is given by the subtraction of initial velocity from the final velocity all over time. Mathematically, acceleration is given by the equation;

\(Acceleration (a) = \frac{final \; velocity - initial \; velocity}{time}\)

Substituting into the equation, we have;

\(a = \frac{3 - 9}{2}\)

\(a = \frac{-6}{2}\)

Acceleration = -3m/s²

The value for her acceleration is negative because she is decelerating i.e her final velocity is lower than her initial velocity.

Answer:

the time is measured with instrument such time,I hope this help

Answer: 1.2 x 10^7kg

Explanation:

Volume of tank = length x width x height

Volume = 51 x 20 x 11

Volume = 11220 m^3

Density = Mass/Volume

Density = 1030 kg/m^3

Volume = 11220 m^3

Mass = m

1030 = m/11220

m = 1030 x 11220

m = 11,556,600 kg or 1.2 x 10^7kg

Answer:

512.5 mJ

Explanation:

Let the two identical charges be q = +35 µC and distance between them be r₁ = 46 cm. A charge q' = +0.50 µC located mid-point between them is at r₂ = 46 cm/2 = 23 cm = 0.23 m.

The electric potential at this point due to the two charges q is thus

V = kq/r₂ + kq/r₂

= 2kq/r₂

= 2 × 9 × 10⁹ Nm²/C² × 35 × 10⁻⁶ C/0.23 m

= 630/0.23  × 10³ V

= 2739.13 × 10³ V

= 2.739 MV

When the charge q' is moved 12 cm closer to either of the two charges, its distance from each charge is now r₃ = r₂ + 12 cm = 23 cm + 12 = 35 cm = 0.35 m and r₄ = r₂ - 12 cm = 23 cm - 12 cm = 11 cm = 0.11 cm.

So, the new electric potential at this point is

V' = kq/r₃ + kq/r₄

= kq(1/r₃ + 1/r₄)

= 9 × 10⁹ Nm²/C² × 35 × 10⁻⁶ C(1/0.35 m + 1/0.11 m)

= 315 × 10³(2.857 + 9.091) V

= 315 × 10³ (11.948) V

= 3763.62 × 10³ V

= 3.764 MV

Now, the work done in moving the charge q' to the point 12 cm from either charge is

W = q'(V' - V)

= 0.5 × 10⁻⁶ C(3.764 MV - 2.739 MV)

= 0.5 × 10⁻⁶ C(1.025 × 10⁶) V

= 0.5125 J

= 512.5 mJ

Work done will be:  \(512.5 \mu J\).

Given:

q = +35 µC

q' = +0.50 µC

r₁ = 46 cm

r₂ = 46 cm/2 = 23 cm = 0.23 m

The electric potential at this point due to the two charges q is thus

\(V = \frac{kq}{r_2}+\frac{kq}{r_2}\\\\ V= \frac{2kq}{r_2}\\\\V= \frac{2 * 9 * 10^9Nm^2/C^2 * 35 * 10^{-6} C}{0.23 m}\\\\V= \frac{630}{0.23*10^3}V\\\\V= 2739.13 * 10^3 V\\\\V= 2.739 \mu V\)

When the charge q' is moved 12 cm closer to either of the two charges, its distance from each charge is now;

r₃ = r₂ + 12 cm = 23 cm + 12 = 35 cm = 0.35 m and

r₄ = r₂ - 12 cm = 23 cm - 12 cm = 11 cm = 0.11 cm.

Thus, the new electric potential at this point is

\(V' = \frac{kq}{r_3} + \frac{kq}{r_4}\\\\V= kq(\frac{1}{r_3}+\frac{1}{r_4})\\\\V= 9 * 10^9 Nm^2/C^2 * 35 * 10^{-6} C (\frac{1}{0.35m}+\frac{1}{0.11m})\\\\V= 315 * 10^3(2.857 + 9.091) V\\\\V= 315 * 10^3 (11.948) V\\\\V= 3763.62 * 10^3 V\\\\V= 3.764 \mu V\)

Now, the work done in moving the charge q' to the point 12 cm from either charge is:

\(W = q'(V' - V)\\\\W= 0.5 * 10^{-6} C(3.764 MV - 2.739 MV)\\\\W= 0.5 *10^{-6} C(1.025 * 10^6) V\\\\W= 0.5125 J\\\\W= 512.5 \mu J\)

Thus, the work done will be: \(512.5 \mu J\).

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The environmental impact of the changes in the amount of energy resources is reduction in air pollution.

Energy resources are the materials that can act as sources of energy which is grouped into two namely:

From the given figures,

In 2014 renewable energy = 19%; while in 2015 it is = 25%

In 2014 non renewable energy when added = 79%; while in 2015 it is = 73%

This shows that there was reduction in the use of non renewable energy from 2014 to 2015 by 6%.

This would affect the environment positively as there would be reduction in air pollution caused by non renewable energy resources.

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Answer:

Red

Orange

Yellow

Green

Blue

Indigo

Violet

shortest wavelength: violet (380 nanometers)

¯\(°_o)/¯

Answer:

Red    Orange    Yellow    Green   Blue   Indigo    Violet

violet has the shortest wavelength

happy to help :)

Newton's Third Law of Motion is a fundamental principle of physics which states that for every action, there is an equal and opposite reaction. This means that whenever one object exerts a force on another object, the second object will exert an equal and opposite force on the first object.

This principle applies to all types of forces, including gravitational, electromagnetic, and mechanical forces. In the case of the apple falling from a tree, the Earth exerts a gravitational force on the apple, pulling it towards the ground with a force of 1.5N. At the same time, the apple exerts an equal and opposite gravitational force on the Earth, pulling the Earth towards the apple with a force of 1.5N. This pair of forces is an example of a Newtonian pair.

The significance of Newton's Third Law is that it helps us to understand the nature of interactions between objects.

Therefore, Newton's Third Law is a fundamental principle of physics that states that for every action, there is an equal and opposite reaction. This principle helps us to understand the nature of interactions between objects, and is a key component of our understanding of the physical world.

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See transcribed text below

Newton's Third Law

Newton's Third Law states that:

"For every action there is an equal and opposite reaction"

What this means is that because forces are interactions between pairs of objects. forces always come in pairs. We call these "Newtonian pairs".

Consider an apple falling from a tree:

gravitational force of the Earth on the apple: 1.5N

1 1

gravitational force of the apple on the Earth: 1.5N

The Earth pulls on the apple with a force of 1.5N. What's surprising is that the apple is also pulling on the Earth with a force of 1.5N. The apple is the thing we see accelerating, because its mass is small enough for 1.5N to create a significant acceleration. Newton's second law, F = ma is responsible for this.

To determine the coefficient of friction for the box weighing 18 Newtons and requiring a force of 3 Newtons to drag it after being coated with Teflon®, you can use the formula:

Coefficient of friction (μ) = Force of friction (F_ friction) / Normal force (F_ normal)

In this case, the Force of friction (F_ friction) is the force required to drag the box, which is 3 Newtons. The Normal force (F_ normal) is equal to the weight of the box, which is 18 Newtons.

Plug these values into the formula:

μ = 3 N / 18 N
μ = 0.1667

The coefficient of friction for the box coated with Teflon® is approximately 0.1667.

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Answer:

Solution : Given,  

Load (L) = ?

L×LD=E×ED

L=100 cm=50N×40 cm

L=40×50÷100

L=20N

Explanation:

Power developed by a model rocket engine will be 73.3 watts. Power is the ratio of the work done or the enrgy to the time period.

The rate of the work done is called the power output. It is denoted by P.Its unit of a watt.

The given data in the problem is;

E is the energy = 66 J

P is the power output =?

t is the time period = 0.9 sec

The power output is given as;

\(\rm P = \frac{E}{t} \\\\ \rm P = \frac{66}{0.9} \\\\ \rm P = 73.3 \ watt\)

Hence power developed by a model rocket engine will be 73.3 watts.

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The gradient of the line is equal to c/m

The gradient of the line on the graph represents the change in temperature T per unit change in thermal energy Q. Mathematically, we can express this as:

gradient = ΔT / ΔQ

We know that the specific heat capacity c of the block is defined as the amount of thermal energy required to raise the temperature of the block by one unit, divided by the mass of the block. Mathematically, we can express this as:

c = ΔQ / (mΔT)

Rearranging this equation, we get:

ΔQ / ΔT = c/m

Comparing this equation with the equation for the gradient, we can see that the gradient is equal to c/m. Therefore, the answer is (A) c/m.

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Answer:

See explanation below

Explanation:

First thing to do here, is to calculate the speed of each runner. The problem states that both runners jog at a constant speed. We are given data for both runners, the starting time and the time where both of them reach the same distance.

With these data we can calculate the speed of both runners. Let's do it with runner 1:

If by t  = 25 s it reach a 64 m of distance, then his speed:

V = d/t   (1)

Replacing we have:

V₁ = 64 / 25 = 2.56 m/s

With this speed we can calculate the distance at t = 45 s so:

d = V * t    (2)

d₁ = 2.56 * 45

So Runner 1 will be at 115.2 from the starting point at 45 seconds.

For runner 2, he began at t = 2.5 s, but he reach the 64 m at 25 s, so his speed would be:

V₂ = 64 / (25-2.5) = 2.84 m/s

And the distance at t = 45 s

d₂ = 2.84 * 45

Runner 2 is 127.8 m from the starting point at 45 seconds.

Hope this helps

Answer:

i believe it would be water

Explanation:

Velocity: 120 miles/hr

Now Distance=  Speed × Time

Now Velocity and speed have the same magnitude. Velocity being a vector quantity has a definite direction. Whereas speed is a scalar quantity,it indicates only the magnitude an doesn't define any direction.

Hence Distance = Velocity x time

Distance = 3.5 × 120 = 420 miles

\(\\ \sf\longmapsto Displacement=Speed(Velocity)\times Time\)

\(\\ \sf\longmapsto Displacement=120(1.6)\)

\(\\ \sf\longmapsto Displacement=192km\)

F=m*a

T = 142N

Work = Force x distance

distance = 6.1 M

Force = 142 x cos 37 = 113.4 N

W= 113.4N x 6.1M = 691.78 J

Answer:

4 x the frequncy

Explanation:

So 4 x the number

Answer:

8 m/s².

Explanation:

We'll begin by calculating the force applied to 0.25 Kg hockey puck. This is illustrated below:

Mass (m) = 0.25 Kg

Acceleration (a) = 16 m/s²

Force (F) =.?

Force (F) = mass (m) × acceleration (a)

F = ma

F = 0.25 × 16

F = 4 N

Therefore, a force of4 N was applied to the 0.25 Kg hockey puck.

Finally, we shall determine the acceleration in which the 4 N force will give to the 0.50 Kg baseball. This can be obtained as follow:

Mass (m) = 0.50 Kg

Force (F) = 4 N

Acceleration (a) =?

F = ma

4 = 0.5 × a

Divide both side by 0.5

a = 4 / 0.5

a = 8 m/s²

Therefore, the same force (i.e 4 N) applied to the hockey puck will give the 0.5 kg baseball an acceleration of 8 m/s².

The average angular acceleration of the figure skater during the 3.0 s interval is 1.31 rad/s².

Angular acceleration is the rate at which the angular velocity of a rotating object changes with respect to time. It is a vector quantity and is defined as the time rate of change of angular velocity, usually denoted by the Greek letter alpha (α).

Angular acceleration occurs when the direction or magnitude of an object's rotational velocity changes. It is caused by a torque, which is the rotational equivalent of force, acting on the object. The greater the torque, the greater the angular acceleration.

The initial angular speed of the figure skater is given as w₁ = 4.07 rad/s and the final angular speed is w₂ = 8.0 rad/s. The time interval during which the acceleration occurs is t = 3.0 s.

The average angular acceleration during this time interval can be calculated using the formula:

average angular acceleration = (change in angular speed) / (time interval)

The change in angular speed is given by:

change in angular speed = w₂ - w₁

Substituting the given values:

change in angular speed = 8.0 rad/s - 4.07 rad/s = 3.93 rad/s

Now, dividing the change in angular speed by the time interval, we get:

average angular acceleration = (3.93 rad/s) / (3.0 s) = 1.31 rad/s²

Therefore, the average angular acceleration of the figure skater during the 3.0 s interval is 1.31 rad/s².

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The initial angular speed of the skater is 4.07 rad/s, and her final angular speed is 8.0 rad/s. She changes her angular speed from 4.07 rad/s to 8.0 rad/s over a time interval of 3.0 s.

To calculate the average angular acceleration during this time interval, we can use the formula:

average angular acceleration = (change in angular speed) / (time interval)

The change in angular speed is:

8.0 rad/s - 4.07 rad/s = 3.93 rad/s

Therefore, the average angular acceleration during the 3.0 s time interval is:

average angular acceleration = (3.93 rad/s) / (3.0 s) = 1.31 rad/s²

Therefore, the skater's average angular acceleration during the 3.0 s interval is 1.31 rad/s².

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Answer:

no :)

Explanation:

ezzzzzzzzzzzzzzzzzzzz

Liquid water is not itself wet, but can make other solid materials wet. Wetness is the ability of a liquid to adhere to the surface of a solid, so when we say that something is wet, we mean that the liquid is sticking to the surface of a material.

Answer:

Initial velocity of the van is 4.95m/s

Explanation:

Acceleration is found using the following formula:
\(a=\frac{v-u}{t}\)

where:

a is acceleration ( in meters per second squared)
v is final velocity ( in meters per second)
u is initial velocity ( in meters per second)
t is time ( in seconds)

We know that:
\(a = 2.15m/s^{2}\)

\(v = 20m/s\)

\(t=7s\)

Therefore, we can find the initial velocity by shifting around some values and making \(u\) the subject within the acceleration formula by multiplying both sides by \(t\):
\(a\) × \(t=v-u\)

Followed by:
\(u = v-at\)

Now we can substitute in the values we have:
\(u = 20-(2.15\) × \(7)\)
\(u = 20 - 15.05\)

\(u=4.95m/s\)

Hybrid

Hybrid modified the concept by adding an internal combustion engine and marketing hybrids that were part electric and part gas powered.

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The speed of the moving train is approximately 33.5 m/s.

The beat frequency is given by the difference in frequency between the two horns, which is equal to the Doppler shift in frequency due to the motion of the moving train. Using the formula for the Doppler effect, we can solve for the speed of the train:

\(f_b = f_s\dfrac{(v + v_o)}{(v + v_s)}\)

where \(f_b\) is the beat frequency, \(f_s\) is the horn frequency, v is the speed of sound, \(v_o\) is the observer's speed, and \(v_s\) is the speed of the source.

We know that \(f_s\) = 410 Hz and \(f_b\) = 35 Hz. The speed of sound in air at standard temperature and pressure is approximately 343 m/s. Since the observer is stationary, \(v_o\) = 0.

Solving for \(v_s\), we get:

\(v_s = \dfrac{(f_s + f_b)}{f_s - 1} \times v\)

\(v_s\) = ((410 Hz + 35 Hz) / 410 Hz - 1) * 343 m/s

\(v_s\) = 33.5 m/s

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The sun is Yellow, red, orange, and blue. Therefore option B is correct.

The star is moving toward an observer. Therefore option B is correct.

39. The type of radioactive decay represented by the equation provided Gamma. Therefore option A is correct.

40. The statement is completed correctly by the information which states that the coal in Alberta has a lower carbon content than coal in other parts of Canada, resulting in reduced greenhouse gas emissions.

29. graph B depicts the relationship between gravitational field strength and the mass of the International Space Station orbiting Earth.

30. The correct sequence of colors representing the changing temperature from the surface to the atmosphere of the sun is Yellow, red, orange, and blue. Therefore option B is correct.

1. When a star undergoes a blue shift, it indicates that the star is moving toward an observer. Therefore option B is correct.

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