Answer:
Specific heat capacity means that in order to raise copper by 1C per kg, it needs 380J of heat energy.
The acceleration of the car is solved by subtracting the initial speed from the final speed then dividing the result by the elapsed time.
initial speed = 72 km/hr = 20 m/s
final speed = 0 m/s
elapsed time = 5 seconds
acceleration = (0 m/s – 20 m/s) / 5 s
acceleration = - 20m/s / 5 s
acceleration = -4 m/s^2
The answer to this question is b
Answer:
see below
Explanation:
Gases flying out at high velocity out the back
rocket flying forward