Answer:
Heat flows from high temperature to low temperature
Explanation:
the answer also may vary it can also be the heat flows from a warmer to colder place
hope this helped!
Answer:
Heat is always the transfer of energy from an object at a higher temperature to an object at a lower temperature.
Explanation:
Answer:
The solar cells transfer light energy to thermal energy.
When the battery is being charged up, chemical energy is transferred to electrical energy.
The motor is designed to transfer potential energy to kinetic energy.
Answer:
46.9 C
Explanation:
The heat released by the gold bar is equal to the heat absorbed by the water:
where:
is the mass of the gold bar
is the specific heat of gold
is the initial temperature of the gold bar
is the mass of the water
is the specific heat of water
is the initial temperature of the water
is the final temperature of both gold and water at equilibrium
We can re-arrange the formula and solve for T_f, so we find:
Answer:
Explanation:
Given:
Unkown:
Formula:
Step by step solution:
Answer:
a) = -30 m/s
b) = 30 m/s
Explanation:
a)
Consider the car A travel at a velocity of = 90 km/h and the car B travel at the velocity of = 120 km/h. As the velocity of the car B is greater than the car A, So it cross the car A. Consider The velocity of car A relative to car B is and it is equal to the velocity of car A minus the velocity of car B.
= -
= 90 - 120
= -30 m/s
b)
Consider The velocity of car B relative to car A is and it is equal to the velocity of car B minus the velocity of car A.
= -
= 120 - 90
= 30 m/s