Geothermal power stations pump water through heated rocks. The temperature of the water increases from 20 °C to its boiling point of 100 °C
Calculate the change in thermal energy when the mass of water heated is 150 kg
Specific heat capacity = 4 200 J/kg °C
Change in thermal energy
J

An initially unpolarized light if intensity 500 w/m^2 passes through four polarizers. the transmission axis between adjacent polarizers is 45∘. what percentage of the initial intensity is transmitted by the system?

What is friction? how does it affect the motion of an object?

In a system with only a single force acting upon a body, what is the relationship between the change in kinetic energy and the work done by the force? answers: work is equal to the change in kinetic energy. work depends on the square of the change in potential energy. work is equal to the negative of the change in kinetic energy. work is equal to the square of the change in kinetic energy