Eddie tosses his phone up to his friends window, which is 4 m above the ground. what energy conversion takes place with respect to the phone?
a kinetic energy to elastic potential energy
b elastic potential energy to kinetic energy
c gravitational potential energy to kinetic energy
d kinetic energy to gravitational potential energy

The air that we breath is made mostly of which gaseous molecule

The precision of a laboratory instrument is ± 0.05 g. the accepted value for your measurement is 7.92 g. which measurements are in the accepted range? check all that apply. 7.85 g 7.89 g 7.91 g 7.97 g 7.99 g

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.