Analyze what happens to the air pressure as you increase in the altitude. how might this affect athletes who compete at higher altitudes?

If a rock is thrown upward on the planet mars with a velocity of 12 m/s, its height (in meters) after t seconds is given by h = 12t − 1.86t2. (a) find the velocity of the rock after two seconds. m/s (b) find the velocity of the rock when t = a. 12−3.72a m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = s (d) with what velocity will the rock hit the surface? m/s

The heliocentric and the geocentric models of the solar system included these central principles

The force needed to overcome static friction is usually less than that needed to overcome kinetic friction.true or false?