Apair of blocks, one 2 times as massive, are connected by compressed spring. when the spring is released, the blocks fly apart. compared to the heavier block, how many times as fast does the lighter block accelerate?

Abaseball picther can throw a ball at about 90 miles per hour, v = 40 m/s, on solid rock ground. we now put him into space. when he throws the ball, which weighs mb = 0.15 kg moves away from himat the same speed. how long does it take the ball thrown in space to travel the 30 meters to the batter? he weighs mp = 100kg

Which sentences describe disadvantages of burning fossil fuels instead of using hydrogen fuel cells? burning fossil fuels contributes to climate change. burning fossil fuels takes place inside expensive fuel cells. fossil fuels aren't widely available, but pure hydrogen is. fossil fuels are nonrenewable.

Clothes dryer uses about 7 amps of current from a 240 volt line. how much power does it use?