A hospital has a back-up generator to power the medical devices in case of a
power failure. Which of the following is the most likely source of mechanical
energy for the generator?
O A. Falling water
O B. Burning coal
O C. Sunlight
O
D. Gasoline or diesel fuel

Acar travels along a highway with a velocity of 24 m/s, west. the car exits the highway; and 4.0 s later, its instantaneous velocity is 16 m/s, 45° north of west. what is the magnitude of the average acceleration of the car during the four-second interval?

What are chlorofluorocarbons and what impact do they have on the atmosphere?

Aperson stands on a platform, initially at rest, that can rotate freely without friction. the moment of inertia of the person plus the platform is ip. the person holds a spinning bicycle wheel with its axis horizontal. the wheel has moment of inertia iw and angular velocity ωw. take the ωw direction counterclockwise when viewed from above. part a what will be the angular velocity ωp of the platform if the person moves the axis of the wheel so that it points vertically upward?