Can someone please help me answer these questions… thank you?
An asteroid with an orbit lying entirely inside Earth’s
a. must have a highly eccentric orbit..
b. moves more slowly than Earth.
c. has a longer orbital period than Earth’s.
d. has an orbital semimajor axis of less than 1 AU.
Escape velocity is the speed required to
a. keep from falling out of orbit around an object.
b. overtake an object in orbit and pass it.
c. maintain a constant distance from an object.
d. overcome the graviational pull of an object.
e. orbit an object.
If the Moon’s orbit were a little larger, solar eclipses would be
a. more likely to be annular.
b. more frequent.
c. more likely to be total.
d. unchanged in appearance.
If the Moon orbited Earth twice as fast, but in the same orbit, the frequency of solar eclipses would
a. be cut in half.
b. double.
c. stay the same.