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mart [117]
4 years ago
8

An apple is placed on a kitchen counter. How could the movement of the particles in the apple be decreased? A.Put it in the refr

igerator B.Eat it for dinner C.Put it in the microwave D.Put it in the sunlight.
Physics
2 answers:
Tanzania [10]4 years ago
6 0

A.Put it in the refrigerator

goldenfox [79]4 years ago
3 0

Answer: Option (A) is the correct answer.

Explanation:

The movement of particles can be decreased by decreasing the temperature.

This is because when we decrease the temperature then there will be decrease in the movement of particles. As a result, kinetic energy of molecules start to change into potential energy. That is, motion of particles starts to decrease and eventually the particles will be at rest.

Thus, we can conclude that when an apple is placed on a kitchen counter then the movement of the particles in the apple can be decreased when we put it in the refrigerator.

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A bug of mass 2.2 g is sitting at the edge of a cd of radius 3.0 cm. if the cd is spinning at 280 rpm, what is the angular momen
m_a_m_a [10]
M = 2.2 g = 2.2 x 10⁻³ kg, the mass of the bug.
r = 3.0 cm = 0.03 m, the radial distance from the center.

The angular speed is
ω = 280 rpm
    = (280 rev/min)*(2π rad/rev)*(1/60 min/s)
    = 29.3215 rad/s

The moment of inertia of the bug is
I = mr²
  = (2.2 x 10⁻³ kg)*(0.03 m)²
  = 1.98 x 10⁻⁶ kg-m²

Calculate the angular momentum of the bug.
J = Iω
  = (1.98 x 10⁻⁶ kg-m²)*(29.3215 rad/s)
  = 5.806 x 10⁻⁵ (kg-m²)/s

Answer: 5.806 x 10⁻⁵ (kg-m²)/s

5 0
4 years ago
This diagram shows three horizontal forces acting on an object.
mixer [17]

Answer:

14N

Explanation:

Hope it will help

Brainlists please

5 0
3 years ago
How long will it take a 400 W engine to lift a 100 N object up to a height of 80 m?
Norma-Jean [14]
<h3>Answer:</h3>

20 seconds

<h3>Explanation:</h3>

<u>We are given</u>;

  • Power of the engine as 400 watts
  • Force as 100 N
  • Distance the object is lifted up as 80 m

We are required to determine the time taken.

  • We need to know that power is the rate of work done

Therefore;

  • Power = Work done ÷ time

But, work done  = Force × distance

  • Therefore; In this case;

Work done = 100 N × 80 m

                  = 8000 Joules

  • Since , Power = Work done ÷ time

Then, time = Work done ÷ Power

Thus;

Time = 8000 J ÷ 400 W

       = 20 s

Therefore, the time taken by the engine to lift the object is 20 seconds

4 0
4 years ago
Read 2 more answers
______________ is the length of the space between two points.
Ira Lisetskai [31]

Answer:

Distance

Explanation:

When using the length of the space between two points, the distance measures the length

3 0
2 years ago
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suppose you had two socks sticking together in the clothes dryer from static electricity.what happens if they are spun gently?
Harrizon [31]
They wouldn't stick because it wouldn't be as fast.
8 0
3 years ago
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