The graph below shows the potential energy and kinetic energy of a falling rock at a single point in time. If energy is conserved and there is no air resistance, which graph best shows the potential and kinetic energy at a later time in the rock's fall?

real, smaller and upside-down.   so the answer should be b.

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it

energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19