Why are satellites placed into orbit at least 150 km above Earth's surface?

to avoid air resistance

to match Earth's curvature

to create inertia

to increase friction

Upward pull of 850 N on a 81.6 kg bale of hay. What is the magnitude of the bales acceleration?

Technician A says that a heater core leak can be the result of the coolant wearing a hole through the core. Technician B says that a core leak can be caused by chemical action eating a hole through the core. Who is correct?

A scientist measures the growth of a bamboo plant over time. The table below shows the results. Time (hours) Height (cm) 10 1.2 20 1.5 30 1.8 40 2.1 50 2.4 60 2.8 What is the best inference for the height of the plant after 15 hours? A. 1.35 cm B. 1.

Do kinetic energy increase with height

What factors do not affect the final speed of a roller coaster?

Which of Newton's laws, when combined algebraically with his law of universal gravitation, can be used to calculate Earth's mass? A) first B) second C) third

Why does a balloon filled with helium rise while a balloon filled with an equal volume of average atmospheric air does not? A. Helium has no mass, but air does. B. Helium increases the balloon's mass more than air. C.

Consider the following controls in an automobile in motion : gas pedal, brake, steering wheel. what are the controls in this list that cause an acceleration of the car?

What material are oil pipelines made from?

3/129 A 175-lb pole vaulter carrying a uniform 16-ft, 10-lb pole approaches the jump with a velocity v and manages to barely clear the bar set at a height of 18 ft. As he clears the bar, his velocity and that of the pole are essentially zero.