22. A skydiver uses a parachute to:
a. increase air resistance, which increases terminal velocity
b. decrease air resistance, which decreases her mass
C. increase air resistance, which decreases terminal velocity
d. increase air resistance, which decreases gravitational acceleration
23.
Which is not true about the role of gravity in the formation of planets?
a Dust and gas particles that were attracted to each other began to rotate into a
protoplanetary disk.
b. Gravity between planetesimals caused them to join together into conglomerate clumps.
c. Our solar system is the only place in the universe where gravity played a key part in the
formation of planets.
d. Gravity of larger objects in orbit around the sun attracted, and cleared the orbital path
of, smaller planetesimals, gas, and dust.