hey everyone i'm new here. you all seem great at physics and my teacher gave us these problems and i have no clue as to how to do them! please help me it is due tonight! 1.Natalie designs stretch limo that is 9 m long but appears to be only 5.000m long when driven at speeds near the speed of light. How fast must Natalie be going to make the limo appear this long to Morgan who is watching the new stretch limo? 2.The net result of a hydrogen fusion reaction is that four hydrogen atoms combine to form a helium atom. The mass lost when rest energy is converted into radiation energy in the reaction is 3.250x10-29 kg. How much radiation energy does this reaction produce?