A 220kg refrigerator is dropped from the top of a 42m tall building. 1. What is the refrigerators potential energy just before it is released?
2. What is the refrigerators kinetic energy just before it's released?
3. What is the refrigerators potential energy just before it strikes the ground?
4. What is the refrigerators kinetic energy just before it strikes the ground?
5. What is the refrigerators speed just before it strikes the ground?

What is the conversion factor between kg/m^3 and g/m^3. express your experimental values for the densities in kg/m^3.

Like a key in a lock, the shape of the. must bind with the. of the recieving neuron

An engineer designs a roller coaster so that a car travels horizontally for 162 ft, then climbs 127 ft at an angle of 31.0° above the horizontal. it then moves 127 ft at an angle of 46.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)