Ignoring air resistance, what maximum speed can be given to a horizontally moving tennis ball at the height of 1.8 m as it passes over the net to remain within the court, which is 12.0 m from the bottom of the net? a) 10.0 m/s
b) 15.0 m/s
c) 20.0 m/s
d) 40.0 m/s

specific latent heat of fusion, lf, of a substance is defined as the amount of heat required to change a unit mass of the substance from solid to liquid state, without any change in the temperature.

explanation:

answer: (431,2)

step-by-step explanation:

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