Ahorizontal spring has one end firmly attached to a wall and the other end attached to a mass. the mass can slide freely on a smooth, horizontal surface with no friction. the mass is pulled away from the equilibrium position by a distance a in the positive x-direction and then released so that it oscillates in simple harmonic motion with frequency f. what will happen to the frequency of the oscillation if the mass is doubled?

What is the function of the commutator in a dc motor? a. to spin the magnet b. to change direct current into alternating current c. to change alternating current into direct current d. to spin the wire coil

Water at room temperature of 20.0°c is poured into an aluminum cylinder which has graduation markings etched on the inside. the reading in the graduations is 300.0 cc. the cylinder with the water in it is then immersed in a constant temperature bath at a temperature of 100°c. what is the reading for the level of water on the graduations of the cylinder after the water and the cylinder reach thermal equilibrium with the bath? the volume coefficient of expansion of water is 2.07 x 10^-4 k-1, and the linear coefficient of expansion of aluminum is 23.0 x 10^-6 k-1. a) 305.0 cc b) 304.0 cc c) 303.5 cc d) 303.3 cc e) 304.5 cc

What is the earliest point in the universe that we can observe? why can’t we see back further than this?