Answer:b)1770 kWh
Explanation:
Given
volume of water
Temperature rise
also 1 kg mass is approximately is 1 gallon
therefore 40,000 gallon is equivalent to 3.8\times 40000 kg
heat Required to raise temperature is
If a magnet is broken into two pieces, what happens to the magnetic poles? One piece will have a north pole, while the other pie
2 answers:
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Answer:
326.25 kWh
Explanation:
Efficiency of a machine is defined as the ratio of useful energy to that of the energy consumed by the machine.
Here, efficiency is given as 87% and the energy consumed by the computer is 375 kWh.
Efficiency,
Plug in the values of and 375 kWh for energy consumed. Solve for useful energy. This gives,
Efficiency,
Therefore, the useful energy provided by the computer is 326.25 kWh.
Answer:
C) The restoring force
Explanation:
Hooke's Law states that the restoring force acting on a spring is given by the equation:
where
k is the spring constant
x is the displacement of the spring from its equilibrium position
The negative sign in the equation tells the direction of the restoring force. In fact, this force tends to bring the spring back to its equilibrium position: so, the force is always in opposite direction to the displacement.
This means that when the spring is stretched to the right, the restoring force tends to bring it back to the left, to the equibrium position; if the spring is compressed to the left, the restoring force tends to bring it back to the right, to the equilibrium position.
So the correct option is
C) The restoring force
I believe this should be everything you need:)
