Calculate the amount of heat needed to convert 0.8 kg of ice at -19 °C into water at 29 °C.

Atransverse wave is traveling on a string stretched along the horizontal x-axis. the equation for the vertical displacement y of the string is given by y = (1.8 x 10-3)cos[π(13x - 60t)], where all quantities are in si units. what is the maximum speed of a particle of the string

Assume this car is driven off a cliff . how many arrows of force need to be drawn in the free body diagram? assume no air resistance -five -one -three -four

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