A truck is moving at a constant speed of 50 m/s. A boy riding in the back of the truck throws a newspaper out the back of the truck at a speed of 20 m/s. What is the speed of the paper relative to someone standing on the roadside?

Answer:

Where speed limit of speed camera is 50 km/h.

Explanation:

Speed cameras work on the principal that photos reflected from the moving car have a higher or lower frequency. This is the Doppler principal. In a  car traveling at the speed of light, the waves/particles will not be able to catch up with that car thus no photon will reflect back to the receiver/speed camera thus no speed will be record. Such a speed is impossible to achieve due to the amount of infinite energy expenditure required. This means if the speed is higher and approaching that of light, the frequency of reflected photons will be very high causing high amounts of energy that could damage the speed camera and cause detection. When the car travels at a higher speed, the photos frequency is high thus more energy they will carry and high chances of the vehicle being detected. This means the time interval of photos taken will be smaller.

Answer:

Probably Trent or something like that

Answer:

Trent or tranthjhikjhjhuiivd

Answer:

C

Explanation:

It says is it a good idea the person so 1 person can say no and the other one can say yes so it is asks for a opinion

A question that asks for an opinion is as follows:

Thus, the correct option for this question is C.

An opinion may be defined as a type of viewpoint, judgment, or statement that is not conclusive, rather than facts, which are true statements. It may vary from person to person, topic to topic, and condition to condition.

The opinion of any individual belongs or relates to one particular person rather than to other people. For example, in this given scenario, some reply to the question with a yes answer. In a manner, it is definitely a good idea to try to establish human colonies on Mars. While some categorized themselves on no side.

Therefore,  the correct option for this question is C.

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Explanation:

(a) What is the maximum height the arrow will attain?

Given:

v₀ᵧ = 54 sin 27.0° m/s = 24.5 m/s

vᵧ = 0 m/s

aᵧ = -9.8 m/s²

Find: Δy

vᵧ² = v₀ᵧ² + 2aᵧΔy

(0 m/s)² = (24.5 m/s)² + 2 (-9.8 m/s²) Δy

Δy = 30.7 m

(b) The target is at the height from which the arrow was shot. How far away is it?

Given:

Δy = 0 m

v₀ᵧ = 54 sin 27.0° m/s = 24.5 m/s

aᵧ = -9.8 m/s²

Find: t

Δy = v₀ᵧ t + ½ aᵧt²

0 m = (24.5 m/s) t + ½ (-9.8 m/s²) t²

t = 5.00 s

Given:

v₀ₓ = 54 cos 27.0° m/s = 48.1 m/s

aₓ = 0 m/s²

t = 5.00 s

Find: Δx

Δx = v₀ₓ t + ½ aₓt²

Δx = (48.1 m/s) (5.00 s) + ½ (0 m/s²) (5.00 s)²

Δx = 241 m

Answer:

Explanation:

a) Using the equation of motion

S = ut + 1/2gt²

S is the distance of fall

g is the acceleration due to gravity

t is the time taken

Given S = 12.0m, g = 9.81m/s^2, un= 0m/s

12 = 0+1/2(9.81)t²

12 = 4.905t²²²

t² = 12/4.905

t² = 2.446

t = √2.446

t = 1.56secs

b) To determine how fast is the frog falling at this point, we need to calculate the speed of the frog. Using the equaton v = u+gt

v = 0+9.81(1.56)

v = 15.34m/s

Hence the frog is falling at the rate of 15.34m/s

Answer:

Deposition

Explanation:

I took the quiz

Deposition is accompanied by a loss in energy as the particles become less energetic hence the entry involving deposition is wrong.

The term phase change simply means a change from one state of matter to another. Phase changes are often accompanied by a loss or gain in energy depending on what process occurred.

The phase change deposition is accompanied by a loss in energy as the particles become less energetic hence the entry involving deposition is wrong.

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Answer:

Li has less mass and therefore less inertia, so he can change his motion more easily than Raj.

Explanation:

Answer:

Li has less mass and therefore less inertia, so he can change his motion more easily than Raj.

Explanation:

In financial markets, a pivot point is a price level that is used by traders as a possible indicator of market movement. A pivot point is calculated as an average of significant prices from the performance of a market in the prior trading period.

Answer:

when an object has more velocity, it tends to have less potential energy and more kinetic energy.

Explanation:

kinetic energy is the energy of movment and velocity helps to describe movement

Answer:

Explanation:

20

Answer:

4.2 km

Explanation:

CAR A(velocity =20m/s to East)

In 1s, it covers 20m.

In 120s(2min),it covers20*120m.=2400m=2.4 km

CAR B(velocity =15m/s to west)

In 1s, it covers 15m.

In 120s, it covers 15*120m.=1800m=1.8km

Now, distance between the two cars after 2 minutes =2.4 km+1.8 km=4.2km

Answer:

The spring constant,k is measured in newtons per meter

Answer:

lol i’m in your physical science class what was the answer

Answer:6m

Explanation:

I guessed the answer and it was right. It was not the tall ones like 16 or 150 because it only took 1.1 second

Given that,

A penny takes 1.1 seconds to hit the ground.

To find,

How high up is the window?

Solution,

When the penny is dropped, its initial velocity is equal to 0 i.e.[tex]u=0[/tex]. The second equation of motion is used to find the relation between position and time. The second equation of motion is :

[tex]s=ut+\dfrac{1}{2}at^2[/tex]

Where

s is the distance

a is acceleration

Here, s = the height of the window from the ground and a = g i.e. acceleration due to gravity

So,

[tex]s=\dfrac{1}{2}gt^2[/tex]

Put all the values,

[tex]s=\dfrac{1}{2}\times 9.8\times (1.1)^2\\\\s=6.05\ m[/tex]

or

[tex]s=6\ m[/tex]

Answer:

The window is [tex]6\ m[/tex] high. The correct option is (d).

Reference:

https://brainly.com/question/12746005

Answer:

[tex]\boxed {\tt 108.695652 \ cm^3}[/tex]

Explanation:

Volume can be found by dividing the mass by the density.

[tex]v=\frac{m}{d}[/tex]

The mass is 100 grams and density is 0.920 grams per cubic centimeters.

Therefore,

[tex]m=100 \ g \\d= 0.920 \ g/cm^3[/tex]

Substitute the values into the formula.

[tex]v=\frac{100 \ g}{0.920 \ g/cm^3}[/tex]

Divide. Note that the grams, or "g" will cancel each other out.

[tex]v- 108.695652 \ cm^3[/tex]

The volume of the ice cube is 108.697652 cubic centimeters.

Answer:

the answer is c testable

Answer:

B. 300 W

Explanation:

2.5 * 120 = 300

Watts is the unit of power

Answer:

Explanation:

The momentum of an object given it's mass and velocity can be found by using the formula

From the question

mass = 0.25 kg

velocity = 15 m/s

We have

momentum = 0.25 × 15

We have the final answer as

Hope this helps you

acceleration is considered to describe an increase or positive change of speed or velocity But deceleation is considered to describe a decrease or negative change of speed or velocity

Answer:

The percent uncertainty of the volume=[tex]\frac{15.70}{523.59} \times 100=2.99\%[/tex]

The volume of sphere with absolute uncertainty=[tex]523.59 \pm 15.7 cm^3[/tex]

Explanation:

Radius of sphere = 5 cm

Radius with uncertainty r'= [tex]5 \pm 0.05[/tex]

Volume of sphere = [tex]\frac{4}{3} \pi r^3=\frac{4}{3} \pi (r')^3[/tex]

[tex]V=\frac{4}{3} \pi (r')^3\\\frac{dV}{dr'}=4\pi (r')^2[/tex]

Where dV is the uncertainty in volume

dr' is the uncertainty in radius

[tex]dV=4\pi (r')^2 dr'\\dV=4 \pi (5)^2(0.05)\\dV=15.70\\V=\frac{4}{3} \pi (r')^3=\frac{4}{3} \pi (5)^3=523.59[/tex]

The percent uncertainty of the volume=[tex]\frac{15.70}{523.59} \times 100=2.99\%[/tex]

The volume of sphere with absolute uncertainty=[tex]523.59 \pm 15.7 cm^3[/tex]

Answer:

Explanation:

According to me, humans visiting an alien planet is more likely. This is because the allien planets may not have higher levels of technology.

Whereas in today's world, the technology have come to aqquire a very high position. So it likely that humans could visit the alien planets because of the technology evolved by them.

Hope this helps

plz mark as brainliest!!!!!!

Answer:

1.  B

2. A

3. C

Explanation:

If a  car moving at 30 m / s has 900 kJ of kinetic energy, then the mass of the car would have been 2000 kilograms.

Mechanical energy is the combination of all the energy in motion represented by total kinetic energy and the total stored energy in the system which is represented by total potential energy.

As for the given problem, we have to find out the mass of the car if the car moving at 30 m/s has 900 kJ of kinetic energy.

Kinetic energy = 1 / 2 m v²

         900000 = 0.5 × m × 30²

                    m = 1000 / 0.5

                        = 2000 kilograms

Thus, If a  car moving at 30 m / s has 900 kJ of kinetic energy, then the mass of the car would have been 2000 kilograms.

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Answer:

Acceleration is considered to describe an increase or positive change of speed or velocity. On the other hand, deceleration is considered to describe a decrease or negative change of speed or velocity.

Answer:

if it is at a speed of 12.5 m / s it would take 2 minutes

Explanation: