The escape velocity from the earth's surfave of Earth is 1.1×10⁴ms¯¹. What is the escape velocity from a point at a height of 0.2r from the Earth's surface? (radius of Earth is r)

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve

An alien spaceship is 500 m above the ground and moving at a constant velocity of 150 m/s upwards. how high above the ground is the ship after 5 seconds?

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?