Calculate the total energy of 4.0 kg object moving horizontally at 20 m/s 50 meters above the surface.
1 answer:
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Answer:
<h2>3 kg </h2>Explanation:
The mass of the ball can be found by using the formula
f is the force
a is the acceleration
We have
We have the final answer as
<h3>3 kg</h3>Hope this helps you
Brass requires more energy than silver
Aluminum requires more energy than copper
Aluminum requires more energy than brass
Explanation:
The specific heat capacity of a substance indicates the amount of heat energy required to raise 1 kg of that substance by 1 degree in temperature.
Mathematically:
where
Q is the heat supplied to the substance
m is the mass of the substance
is the change in temperature
Therefore, the higher the specific heat capacity of a substance, the more energy is needed to increase its temperature.
Here we can compare the specific heat capacity of the materials mentioned:
Silver:
Brass:
Platinum:
Aluminium:
Copper:
Therefore, the correct statements are:
Brass requires more energy than silver
Aluminum requires more energy than copper
Aluminum requires more energy than brass
Learn more about specific heat:
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