As a 5.00-kg sample of liquid mercury is cooled into a solid, it liberates 157kj of energy. what is the original temperature of the mercury? for mercury, the melting point is 234 k the heat of fusion is 11.3kj/kg and the specific heat is 140j/kg. k. 410 k
690 k
157 k
378 k

The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.

Which of the choices are parts of an atom? select all that apply. a.) compound b.) electron c.) neutron d.) molecule e.) photon f.) proton g.) element

Your friend increases her force on the desk by 30n . she doesn't change the direction of her push . what happens to the net force on the desk .will the desk accelerate