In your own words, explain red shift and blue shift. use at least two complete sentences to write your answer.

When does your body conduct current more readily?

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.

What types of radiation make up the electromagnetic spectrum?