1 Point
Carlos drops a rock from a bridge into the water below. The rock falls for 3.0 s
before hitting the water. What is the speed of the rock as it hits the water at
3.0 s? Assume only gravity is acting on it.
O A. 3.3 m/s
O B. 29 his
O C. 3.0 m/s
O D. 9.8 m/s
SUBMIT

Which situation will produce the greatest change of momentum

Why does karst topography exist in some geographic location? a. few climates have enough oxygen b. most regions have rock layers other than limestone c. in most regions, the soil is too thin d. the water is too acidic enough in most places

To place a communications satellite into a geosynchronous orbit at an altitude of 22,240 mi above the surface of the earth, the satellite first is released from a space shuttle , which is in a circular orbit at an altitude of 185 mi, and then is propelled by an upper-stage booster to its final altitude. as the satellite passes through a, the booster's motor is fired to insert the satellite into an elliptic transfer orbit. the booster is again fired at b to insert the satellite into a geosynchronous orbit. knowing that the second firing increases the speed of the satellite by 4810ft/s, determine (a.) the speed of the satellite as it approaches b on the elliptic transfer orbit, (b.) the increase in speed resulting from the first firing at a.