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Ainat [17]
1 year ago
5

A rocket in outer space is traveling toward a far-off planet. An astronaut turns on the rocket’s engines, which exerts a force o

n the rocket. There is no gravity or air resistance.When the astronaut turns off the engines, what will the rocket do?possible answersIt will steadily slow down because no forces are acting on it.It will continue moving with a constant speed because no forces are acting on it.It will continue moving with a constant speed because the force from the engines is still acting on it.It will steadily slow down until the force from the engines is gone.
Physics
1 answer:
vazorg [7]1 year ago
5 0

Answer:

It will continue moving at a constant speed because no forces are acting on it.

Explanation:

By the second law of Newton, the force is proportional to the acceleration. If there is no force, there is no acceleration. So, when the astronaut turns off the engines, the rocket will have no acceleration which means that the speed will be constant.

Therefore, the answer is:

It will continue moving at a constant speed because no forces are acting on it.

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The light energy that falls on a square meter of ground over the course of a typical sunny day is about 20 MJ . The average rate
Sphinxa [80]

86.4×10^6 joule is energy does one house use during each 24 hr day.

20 MJ of light energy

Consumption of electricity is 1 kW.

The energy consumption lasts for 24 hours.

energy=power×time

energy=10^3×24×3600

energy=86.4×10^6 joule

Energy in physics is the ability to perform work. Different shapes, such as potential, kinetic, thermal, electrical, chemical, radioactive, etc., may be assumed by it. Other examples of energy being transferred from one body to another include heat and work. Energy is always distributed after it has been transported in accordance with its type. Thus, heat transfer could result in thermal energy, whereas work could result in mechanical energy.

Motion is a trait shared by all forms of energy. For instance, if a body is moving, it has kinetic energy. Due to the object's design, which incorporates potential energy, a tensioned object, like a spring or bow, has the ability to move even when at rest.

To know more about  energy visit : brainly.com/question/1932868

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8 0
1 year ago
A box falls out of a stationary helicopter hovering 135 m above the ground. How long will it take to hit the ground?
Marrrta [24]

We have the equation of motion s = ut + \frac{1}{2} at^2, where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.

Here displacement = 135 m, Initial velocity = 0 m/s, acceleration = 9.81 m/s^2

Substituting

   135 = 0*t+\frac{1}{2} *9.8*t^2\\ \\ 4.9t^2 =135\\ \\ t =5.25 seconds

A box falls out of a stationary helicopter hovering 135 m above the ground will take 5.25 seconds to reach the ground.

4 0
3 years ago
At a distance of 8 m, the sound intensity of one speaker is 66 dB. If we were to place 3 speakers in a circle of radius 8 m, wha
ludmilkaskok [199]

Answer:

dβ = 70. 77 dβ

Explanation:

The intensity of sound in decibels is

         dβ = 10 log I/I₀

let's look for the intensity of this signal

         I / I₀ = 10 dβ/10

         I / I₀ = 3.981 10⁶

the threshold intensity of sound for humans is I₀ = 1 10⁻¹² W / m²

         I = 3.981 10 ⁶ 1 10⁻¹²

         I = 3,981 10⁻⁶ W / m²

It is indicated that 3 cornets are placed in the circle, for which total intensity is

        I_total - 3 I

        I_total = 3  3,981 10⁻⁶

        I_total = 11,943 10⁻⁶ W / m²

let's reduce to decibels

      dβ = 10 log (11,943 10⁻⁶/1 10⁻¹²)

      dβ = 10  7.077

      dβ = 70. 77 dβ

3 0
3 years ago
PLS SOMEONE HELP PLSSS
ololo11 [35]
The answer is C they slowly move apart
6 0
2 years ago
3. A (n) __ stores food or water in a cell
pishuonlain [190]
A vacuole stores water and food in a cell
8 0
3 years ago
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