Auniform 4.3-kg cylinder can rotate about an axis through its center at o. the forces applied are: f1 = 7.4 n, f2 = 4.2 n, f3 = 7.9 n, and f4 = 5.1 n. also, r1 = 13.5 cm and r3 = 7.0 cm. find the magnitude and direction (+: counterclockwise; -: clockwise) of the angular acceleration of the cylinder.

Light that is polarized along the vertical direction is incident on a sheet of polarizing material. only 96% of the intensity of the light passes through the sheet and strikes a second sheet of polarizing material. no light passes through the second sheet. what angle does the transmission axis of the second sheet make with the vertical?

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

Aphoton is absorbed by an electron that is in the n = 3 state of a hydrogen atom, causing the hydrogen atom to become ionized. very far away from the nucleus, the released electron has a velocity of 750,000 m/s. what was the wavelength of the absorbed photon?