An iron has an aluminium plate with a mass of 2Kg. The thermal energy stored in the plate when the temperature rises from 30℃to 100℃ is 1.2*10^5J. Calculate the specific heat capacity of aluminium.

Road users moving into your lane, brake lights, and abrupt changes in road surface are a. rare at night b. indicators of potential hazards c. not worth worrying about before you reach them d. no problem for experienced drivers

Immediately upon reaching its lowest point, a falling pendulum bob has its greatest amount of energy, which is the initial amount of potential energy. a. heat; less than b. heat; more than c. kinetic; less than d. kinetic; more than

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?