The earth orbits around the sun once a year in a nearly circular orbit of radius 1.5x108km. Determine: Angular speed of the earth? give your answer in rad/day. The tangential speed of the earth? (km/day) Distance traveled in one day (km

The de broglie relation λ=h/p can be rewritten in terms of the wave number k as p=kℏ. recall that wave number is defined by k=2π/λ. using the fact that λ=v/f, find the wave numbers k1 and k2 corresponding to frequencies f1 and f2. express your answer as two expressions

A200-n force is applied to the foot-operated air pump. the return spring s exerts a 2.6-n·m moment on member oba for this position. determine the corresponding compression force c in the cylinder bd. if the diameter of the piston in the cylinder is 40 mm, estimate the air pressure generated for these conditions. state any assumptions. enter a positive number for the compression force c.

The direction of the current in an alternating current circuit remains constant. is direct. changes repeatedly. changes randomly.