mercury is 57.9 x 10^6 km from the sun. venus is 108.2 x 10^6 km from the sun. if venus has a period of 224.7 earth days, how many earth days does it take mercury to make one trip around the sun?

thermal energy is the answer

compass can be used day and night, cloudy or sunny

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.

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