Answer:
given,
mass of copper = 100 g
latent heat of liquid (He) = 2700 J/l
a) change in energy
Q = m Cp (T₂ - T₁)
Q = 0.1 × 376.812 × (300 - 4)
Q = 11153.63 J
He required
Q = m L
11153.63 = m × 2700
m = 4.13 kg
b) Q = m Cp (T₂ - T₁)
Q = 0.1 × 376.812 × (78 - 4)
Q = 2788.41 J
He required
Q = m L
2788.41 = m × 2700
m = 1.033 kg
c) Q = m Cp (T₂ - T₁)
Q = 0.1 × 376.812 × (20 - 4)
Q = 602.90 J
He required
Q = m L
602.9 = m × 2700
m =0.23 kg
Helping verbs come before the main verb, the main verb in the sentence is repair therefor the helping verb would be could.
When a candle burns, the form energy that is being transformed from chemical energy would be heat energy and light energy. The flame is in the form of light energy. Also, <span>the wax melts and then volatilizes, so some energy is going into the material to do that, called latent heat.</span>
Answer:
I had this on my test too it took a lot of thinking but I got it
Explanation:
Energy is not created but transformed meaning the energy just transformed into a different type meaning at all points of the ramp the energy stays the same because all of its energy is just transformed into kinetic energy.
Answer:
Answer is freezing point of water. The same melting point of ice is the same freezing point of water.