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pav-90 [236]
3 years ago
11

What is the kinetic energy of a 16g billiard ball moving at 2.5 m/s?​

Physics
1 answer:
LUCKY_DIMON [66]3 years ago
8 0

Explanation:

KE=1/2mv^2

=1/2×16×10^-3×2.5

=0.02

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How does approaching a temperature of absolute zero affect kinetic energy.?
Alexus [3.1K]

First of all the kinetic energy is when the particles move in continuous random motion.

If the temperature is high the colliding particles will collide more. and if the temperature is low the colliding particles will collide less.

Low temperature result in low kinetic energy 
High temperature result in high kinetic energy

Absolute zero is the point where where all molecules have no kinetic energy. It is a theoretical value (it has never been reached).

The Kelvin temperature scale is based on absolute zero being the lowest possible temperature that could theoretically be reached. That is why there is no such thing as a negative Kelvin temperature value.

7 0
3 years ago
A physical system that is isolated from its environment is:
kompoz [17]

Closed

Explanation:

A physical system that is isolated from its environment is said to be a closed system.

In a closed system, energy can be exchange but matter cannot be exchanged.

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Learn more:

Momentum of an isolated system brainly.com/question/7973509

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8 0
3 years ago
A kettle is rated at 1 kW, 220 V. Calculate the working resistance of the kettle.
Anna [14]

Explanation:

Power of electric kettle, P = 1 kW

Voltage, V = 220 V

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P=\dfrac{V^2}{R}

R is resistance

R=\dfrac{V^2}{P}\\\\R=\dfrac{(220)^2}{10^3}\\\\R=48.4\ \Omega

(b) When connected to a 220 V supply, it takes 3 minutes for the water in the kettle to reach boiling point.

Energy supplied is given by :

E=P\times t

P is power, P=\dfrac{V^2}{R}

E=\dfrac{V^2}{R}t\\\\E=\dfrac{(220)^2}{48.4}\times 180\\\\E=180000\ J\\\\E=180\ kJ

5 0
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TEA [102]
It was a man named <span>Johannes Kepler. </span>
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StarsA. begin as protostars, which fire up when they collapse and become denser and hotter.B. create elements by splitting the n
Colt1911 [192]

Answer:

A

Explanation:

Begin as protostars, which fire up when they collapse and become denser and hotter.

4 0
3 years ago
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