2. A car starts from rest at constant acceleration of 2.0 m/s². At the same instant a truck travelling with a constant speed of 10 m/s overtakes and passes the car. (b) After what time will this happen?​

Answer:

Weight of the body,W=63 N

Acceleration due to gravity at height h from the Earths surface is given by the relation:

g  ′ =  (1+  R  e ​   h ​  )  2   g ​  

Substituting h=R  e ​  /2, g  ′  =4g/9  

Weight of body of mass m at height h is given as: W  ′  =mg  ′  

      =4/9 mg

      =4/9×63=28 N

Answer:

A systematic error may result in a high degree of precision.

A systematic error will likely result in poor accuracy

Explanation:

It's what my work gave me when I got it wrong

Answer:

Explanation:

We shall apply Wien's displacement law which is as follows .

λ T = b where λ is wavelength of light that is coming out of hot body to maximum extent .

Putting the value of temperature given and b

λ x 500 = 2898 μmK

λ = 5.796 μm = 5796 nm

For temp 1050 K

λ = 2760 nm

For temp 1800 K

λ = 1610  nm

For temp 2500 K

λ = 1159.2  nm

The visible range starts from 740 nm .

Hence we can expect that some amount of visible light may emerge at the temperature of 2500K because the wavelength that we have calculated above gives the value of peak wavelength of a spectrum of light coming out of hot body .  

Answer:

the material

Explanation:

weight is defined as the amount of force on the object because of gravity. ping pong balls and bouncy balls are made out of different materials that are different weights. most bouncy balls are also not hollow, unlike ping pong balls. these factors affect the weight of these objects.

Explanation:

Friction acts between two surfaces in contact only and opposes the movement of one body with respect to another. Therefore friction is a force which opposes the relative motion between two bodies. If a body is moving it is slowed down by frictional force applied on it by the surface on which it is moving.

Answer:

When waves travel from one medium to another the frequency never changes. As waves travel into the denser medium, they slow down and wavelength decreases. Part of the wave travels faster for longer causing the wave to turn. The wave is slower but the wavelength is shorter meaning frequency remains the same.

Explanation:

\( \frac{4577}{7 \times (80 - ( - 12))} \\ \frac{4577}{7 \times92 } \\ \frac{4577}{644} \\ = 8.5g\)

Tire inflation should be checked when the tires are cold.

Tire inflation can be defined as a phenomenon in which the amount of air pressure (compressed air) in the tire of an automobile vehicle is greater than the recommended (standard) amount of air pressure that is required by the manufacturer, in order to enhance safety.

This ultimately implies that, tire inflation is a measure of the total amount of air pressure (compressed air) in the tire of an automobile vehicle as recommended by the manufacturer of the vehicle.

Additionally, proper tire inflation enhances safety and it can greatly influence gasoline mileage of an automobile vehicle. However, it is only appropriate to check tire inflation when the tire is cold.

Read more on tire inflation here: https://brainly.com/question/28489729

#SPJ1

Answer: An 8 kg book at a height of 3 m has the most gravitational potential energy.

Explanation:

Gravitational potential energy is the product of mass of object, height of object and gravitational field.

So, formula to calculate gravitational potential energy is as follows.

U = mgh

where,

m = mass of object

g = gravitational field = \(9.81 m/s^{2}\)

h = height of object

(A) m = 5 kg and h = 2m

Therefore, its gravitational potential energy is calculated as follows.

\(U = mgh\\= 5 kg \times 9.81 m/s^{2} \times 2 m\\= 98.1 J (1 J = kg m^{2}/s^{2})\)

(B) m = 8 kg and h = 2 m

Therefore, its gravitational potential energy is calculated as follows.

\(U = mgh\\= 8 kg \times 9.81 m/s^{2} \times 2 m\\= 156.96 J (1 J = kg m^{2}/s^{2})\)

(C) m = 8 kg and h = 3 m

Therefore, its gravitational potential energy is calculated as follows.

\(U = mgh\\= 8 kg \times 9.81 m/s^{2} \times 3 m\\= 235.44 J (1 J = kg m^{2}/s^{2})\)

(D) m = 5 kg and h = 3 m

Therefore, its gravitational potential energy is calculated as follows.

\(U = mgh\\= 5 kg \times 9.81 m/s^{2} \times 3 m\\= 147.15 J (1 J = kg m^{2}/s^{2})\)

Thus, we can conclude that an 8 kg book at a height of 3 m has the most gravitational potential energy.

Answer:

D is the answer.

Explanation:

Just do it.

Answer:

D

Explanation

just took the test

The amount of work done by the gas is proportional to the pressure and the change in volume, as well as the efficiency of the process. If the pressure and volume are known, the work done by the gas can be calculated by multiplying these values by the efficiency of the process.

The amount of work done by a gas when it expands is proportional to the change in volume, pressure, and temperature. According to the first law of thermodynamics, the energy of a closed system is conserved, so the work done by the expanding gas is equal to the energy transferred from the gas to the environment in the form of work. Therefore, the work done by the gas is equal to the change in energy of the system. Assume that the process is 10% efficient. Then, only 10% of the energy available to the system is converted into work. This means that the remaining 90% of the energy is lost to the environment in the form of heat. As a result, the amount of work done by the gas expanding into the atmosphere is given by the formula

W = E x η, where W is the work done by the gas, E is the energy available to the system, and η is the efficiency of the process. The energy available to the system is determined by the difference between the internal energy of the gas before and after the expansion. The internal energy of a gas is determined by its temperature, pressure, and volume.

Assuming that the temperature and pressure are constant, the change in internal energy is proportional to the change in volume. Therefore, the energy available to the system is equal to the product of the pressure and the change in volume: E = P x ΔV, where P is the pressure of the gas and ΔV is the change in volume during the expansion. Substituting this equation into the formula for work, we get W = P x ΔV x η.

For more question gas

https://brainly.com/question/31549188

#SPJ8

A stronger force can cause a greater change in an object's velocity. The correct option is yes

The force exerted by the thrusters caused the pod to change direction. The thrusters on the ACM pod exerted the same strength force as thrusters on other pods on other missions. If the same strength force is exerted on two objects but the objects have different masses the object with less mass will have a greater change in velocity.

Therefore pod would have had to have a lighter mass meaning a smaller amount of force would have had to be exerted onto the pod making it move in the opposite direction.

Learn more about pod change here: brainly.com/question/19148969

#SPJ1

ANSWER AND EXPLAINATION:
To calculate the impulse imparted on the baseball, we can use the impulse-momentum principle, which states that the impulse experienced by an object is equal to the change in momentum of the object. Mathematically, it can be expressed as:

Impulse = Change in momentum

The momentum of an object is given by the product of its mass and velocity:

Momentum = mass × velocity

In this case, the baseball has an initial mass of 0.14 kg and an initial velocity of 32 m/s. After being struck by the bat, it travels in the opposite direction at a velocity of 49 m/s.

Therefore, the change in momentum is given by:

Change in momentum = (mass × final velocity) - (mass × initial velocity)

Change in momentum = mass × (final velocity - initial velocity)

Change in momentum = 0.14 kg × (49 m/s - (-32 m/s))

Change in momentum = 0.14 kg × (49 m/s + 32 m/s)

Change in momentum = 0.14 kg × 81 m/s

Change in momentum = 11.34 kg·m/s

So, the impulse imparted on the baseball is 11.34 kg·m/s.

Answer:

Acidity

Explanation:

pH measures how acidic or basic a substance is.

Answer:

a) Acidity

Answer:

The reason that the nucleus of most atoms does not fall apart despite the oppositely charged protons exerting a repulsive force on each other is the strong nuclear force.

The strong nuclear force is one of the fundamental forces in nature that acts between protons and neutrons in the atomic nucleus. It is a short-range force that is much stronger than the electromagnetic force (which produces the repulsion between protons).

The strong nuclear force is responsible for holding the nucleus together.

Additionally, the ratio of protons to neutrons in a nucleus also affects its stability. Therefore, if there is an imbalance in this ratio, the repulsive force between the protons can become too strong, causing the nucleus to become unstable and undergo radioactive decay.

Overall, the nucleus remains stable due to the balance between the strong nuclear force and the repulsive force between the protons.

So, the speed when it (the rock) hit the ground is 14 m/s.

Hi ! This question will direct you to the "Free Fall Motion" material. Why is that ? This is because there is a keyword "dropped" which means without initial speed and its named free fall motion. Its little bit of different, when the keyword "thrown", that's not a free fall motion. For the equations of velocity in free fall, follow the following equation:

\( \boxed{\sf{\bold{v = \sqrt{2 \times g \times h}}}} \) ... (i)

\( \boxed{\sf{\bold{v = \sqrt{2 \times g \times (h_1 - h_2)}}}} \) ... (ii)

With the following condition :

Note :

We know that :

What was asked :

Step by step :

\( \sf{v = \sqrt{2 \times g \times h}} \)

\( \sf{v = \sqrt{2 \times 9.8 \times 10}} \)

\( \sf{v = \sqrt{196}} \)

\( \boxed{\sf{v = 14 \: m/s}} \)

So, the speed when it (the rock) hit the ground is 14 m/s.

Answer:

v_g,i = 1.208 m/s

Explanation:

We are given;

Mass of girl; m_g = 47.2 kg

Mass of plank; m_p = 177 kg

Let the velocity of girl to ice be v_g,i

Let the velocity of plank to ice be v_p,i

Since the velocity of the girl is 1.53 m/s relative to the plank, then;

v_g,i + v_p,i = 1.53

From conservation of momentum;

m_g × v_g,i = m_p × v_p,i

Thus;

47.2(v_g,i) = 177(v_p,i)

Dividing both sides by 47.2 gives;

v_g,i = 3.75(v_p,i)

v_pi = (v_g,i)/3.75

Thus, from v_g,i + v_p,i = 1.53, we have;

v_g,i + ((v_g,i)/3.75) = 1.53

v_g,i(1 + 1/3.75) = 1.53

1.267v_g,i = 1.53

v_g,i = 1.53/1.267

v_g,i = 1.208 m/s

Answer:

you may get bullied or teased for being a differrent race, ethnic.

Answer:

Workload

Explanation:

You may feel stressed about a heavier workload or more too do. You will also be paid as an employee unlike, a student.

Answer:

Question 1: the plates are moving toward one another.

Question 2: The Himalayan Mountains in India

Question 3: Because mountains are formed instead.

Explanation:

The paragraph explains that the plates continue to move closer to one another while forming multiple mountains.

The paragraph explains, " a well-known example of this is the formation of the Himalayan Mountains in India,"

The area of the Himalayan Mountains are better suited for the formation of mountains rather than volcanoes.

Have a nice day!! Good Luck!! Brainliest would be appreciated!!!

The space above a hung ceiling used for environmental air-handling purposes is an example of other space used of environmental air (plenum) and the wiring limitations of 300.22(C) apply. Therefore, the correct option is option B.

An environment may be simply defined as a system that includes all its abiotic and biotic components that have an impact on human life. All flora and animals are considered biotic, or living, elements, whereas water, sunshine, air, temperature, etc. are considered abiotic.

An environment's resources can be any good, service, or feature that benefits people and society. The space above a hung ceiling used for environmental air-handling purposes is an example of other space used of environmental air (plenum) and the wiring limitations of 300.22(C) apply.

Therefore, the correct option is option B.

To know more about environment, here:

https://brainly.com/question/28962722

#SPJ1

Answer:

\(F = kx \\ k = \frac{F }{x} \)

so the answer is a

The change in momentum of the ball is 1.0 kg m/s [E].

The change in momentum of the ball can be calculated using the momentum equation:

Δp = pf - pi

Where

The momentum of an object can be calculated as the product of its mass and velocity:

p = mv

Where

Using the given values, we can calculate the initial momentum of the ball:

pi = mvi = (0.1 kg)(5 m/s [W]) = 0.5 kg m/s [W]

Similarly, we can calculate the final momentum of the ball:

pf = mvf = (0.1 kg)(5 m/s [E]) = 0.5 kg m/s [E]

Substituting these values into the momentum equation, we get:

Δp = pf - pi = 0.5 kg m/s [E] - 0.5 kg m/s [W] = 1.0 kg m/s [E]

Therefore, the change in momentum of the ball is 1.0 kg m/s [E].

Learn more about momentum equation here : brainly.com/question/28902742

#SPJ1

The quarterback is getting hit with a force of 100 Newtons.

We can use Newton's second law of motion:

Force = Mass * Acceleration

Given that the mass of the defensive lineman is 100 kg and the acceleration is 1 m/s², we can substitute these values into the equation:

Force = 100 kg * 1 m/s²

Force = 100 N

Therefore, the quarterback is getting hit with a force of 100 Newtons.

Learn more about  Newton's second law here : brainly.com/question/1121817

#SPJ1

Recall that

\({v_f}^2={v_i}^2+2a\Delta y\)

where \(v_i\) and \(v_f\) are the lion's initial and final vertical velocities, \(a\) is its acceleration, and \(\Delta y\) is the vertical displacement.

At its maximum height, the lion has 0 vertical velocity, so we have

\(0={v_i}^2-2gy_{\rm max}\)

where g is the acceleration due to gravity, 9.80 m/s², and we take the starting position of the lion on the ground to be the origin so that \(\Delta y=y_{\rm max}-0=y_{\rm max}\).

Let v denote the initial speed of the jump. Then

\(v_i=v\sin(43.2^\circ)=\sqrt{2\left(9.80\dfrac{\rm m}{\mathrm s^2}\right)(3.25\,\mathrm m)}\implies\boxed{v\approx11.7\dfrac{\rm m}{\rm s}}\)

The initial speed will be "11.7 m/s".

Given:

We know,

→ \(vf^2=v_i^2+2a\Delta y\)

At max. height, vertical height be zero, then

→ \(0 = v_i^2-2gy_{max}\)

or,

→ \(\Delta y = y_{max} -0 = y_{max}\)

now,

The initial speed,

→ \(v_i = v \ Sin(43.2^{\circ})\)

By substituting the values,

      \(= \sqrt{1\times 9.8\times 3.25}\)

      \(= 11.7 \ m/s\)

Thus the solution above is correct.

Find out more information about speed here:

https://brainly.com/question/4130932

Mark's work decreases when he climbs the same flight of stairs again in the same amount of time without the cello.

The correct answer is option D.

The amount of work Mark does depends on the weight of the cello, as well as the distance he climbs and the time it takes. Work is calculated using the formula :

Work = Force × Distance.
In the given scenario, Mark is carrying a full-sized cello while climbing the stairs. The weight of the cello adds to the force he exerts. So, the total force Mark exerts is the weight of the cello plus his own weight (375 N).

When Mark climbs the stairs with the cello, he is doing work against the force of gravity.

The work done is equal to the force exerted multiplied by the distance climbed (375 N + weight of cello) × 4 m.

Now, if Mark were to climb the same flight of stairs again in the same amount of time (3 seconds), but this time without the cello, the amount of work he does would decrease. This is because without the cello, the force exerted would only be Mark's weight (375 N), which is less than the total force exerted with the cello.

Therefore, mark's work decreases.

For more such questions on work visit:

https://brainly.com/question/28356414

#SPJ8

Energy is that which has the ability to cause change in matter.

Energy is the quantitative property that is transferred to a body or to a physical system, recognizable in the performance of work and in the form of heat and light. Energy is a conserved quantity—the law of conservation of energy states that energy can be converted in form, but not created or destroyed.

So in simple definition we can say that energy is that which has the ability to cause change in matter.

Based on the given statements we can classify them as;

Learn more about energy here: https://brainly.com/question/13881533

#SPJ1

The impeachment process is described in Article I of the United States Constitution. Impeachment is the process by which senior political officials of the government can be removed from office, for reasons of treason, bribery or serious misconduct in the exercise of their functions.

The first step in this process is carried out by the House of Representatives, which is in charge of determining the origin of the impeachment, assessing the grounds and evidence that allow or not to prosecute the politician in question through a simple majority vote. Then, the Senate is in charge of the trial itself, determining the guilt or not of the official.

Ur pfp cute no cap

The Founders divided the process into two steps which are impeachment

and conviction to ensure the affected person has a fair judgement and

subsequent trial.

The house of representatives are in charge of the impeach process if an

office holder commits an offence in which impeachment can suffice. The

members of the house of representatives vote and the office holder is

impeached if the majority vote in that direction.

The Senate then takes over and the person faces trial and the judgement is

passed according to the available evidences.

Read more on https://brainly.com/question/22141134

Answer:

=24.25 ^−1

Explanation:

Let   and   be initial and final velocity of the body respectively,  

be acceleration due to gravity ( 9.8^−2 ),  ℎ be the height of the body.

=0 ^ −1

ℎ=30

we know that, ^2−^ 2=2ℎ

^2=2∗9.8∗30

^2=588

=24.25 ^−1