Aluminium has a specific heat capacity of 900 J/(kg°C). The internal energy of a 2.0kg block of aluminium increases by 13500 j.
By how much does the temperature of the block increase?

B 0.13°C
C 7.5°C
A
0.067 °C
D 15°C

In the sport of parasailing, a person is attached to a rope being pulled by a boat while hanging from a parachute-like sail. a rider is towed at a constant speed by a rope that is at an angle of 15 ∘ from horizontal. the tension in the rope is 1900 n. the force of the sail on the rider is 30∘ from horizontal. what is the weight of the rider? express your answer with the appropriate units.

In the circuit shown below, with each bulb holding a resistance of 60 ohms, how many amps of current are flowing? express your number as a decimal.

Where is the potential energy throughout the loading, cocking, and releasing of the trebuchet?