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ludmilkaskok [199]
2 years ago
5

Nya has a cup of hot tea that she lets cool down for several minutes. What effect does cooling have on the tea?

Physics
1 answer:
Y_Kistochka [10]2 years ago
3 0

Answer:

<em>Its particles have less kinetic energy</em>

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2. A brick is sitting on a building 22 m high. It has a mass of 7.9 kg. What amount of potential
Citrus2011 [14]

Answer:

1703.24J

Explanation:

Given parameters:

Mass of brick  = 7.9kg

Height of building  = 22m

Unknown:

Potential energy of the brick  = ?

Solution:

The potential energy of a body is the energy at rest of the body. Mathematically;

 

         P.E = mgh

m is the mass of the brick

g is the acceleration due to gravity

h is the height of the building

  Insert the given parameters and solve;

        P.E  = 7.9 x 9.8 x 22  = 1703.24J

6 0
3 years ago
In an experiment what are all the parts of an experiment that remain unchanged are called<br>​
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3 years ago
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BigorU [14]

The correct answer is A. 32.5

Mechanical advantage is the ratio of force that is input into a machine to the force output.

Mechanical advantage of a wheel and axle is calculated by dividing the radius of the wheel by that of the axle.

MA=R/r where R is the radius of the wheel and  r is the radius of the axle.

Substituting for the values in the question gives:

MA=26cm/0.8cm

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6 0
3 years ago
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What is an example of an electromagnetic wave? Select all that apply. *
Afina-wow [57]

Answer:

A gamma ray, light from a lamp, and a microwave are examples of electromagnetic radiation.

Explanation:

Gamma radiation, visible light (light from a lamp), and microwaves are all apart of the electromagnetic spectrum.

8 0
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Gemiola [76]
I can't decide between A and B, but B seems more likely to me. Even though the molecules don't look like they're moving, the area of contact is slightly more compressed.
7 0
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