An object dropped from rest almost infinitely far from earth falls to earth because of earth's gravitational field, and strikes the surface with a speed of about
a. 8 km/s
b. 9.8 m/s
c. 11 km/s
d. none of the above

Which feature indicates that mars resides in the inner region of the solar system

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest

Balloon a has charge q, and identical mass balloon b has charge 10q. you hang them from threads near each other. choose all of the statements with which you agree. check all that apply. a. a and b exert the same magnitude forces on each other. b. the force that a exerts on b is 10 times the force that b exerts on a. c. the angle between the thread supporting a and the vertical is < the angle between the thread supporting b and the vertical. d. the force that a exerts on b is 1/10 the force that b exerts on a.