Velma, the space woman, is orbiting above Earth's surface in a low-altitude orbit. Does she actually have weight, or is she actually weightless, and why?
A) She actually has weight, because Earth actually is pulling on her with nearly the normal pull of gravity.
B) She is weightless because she is away from the pull of Earth's gravity.
C) She is weightless because she is falling freely around the earth.
D) She is weightless because she is in a vacuum.
E) She actually has weight, because her weight remains the same no matter where she goes in the universe.
Question 2
A sled having a certain initial speed on a horizontal surface comes to rest after traveling 10 m. If the coefficient of kinetic friction between the sled and the surface is 0.20, what was the initial speed of the sled?
A) 9.8 m/s
B) 6.3 m/s
C) 3.6 m/s
D) 7.2 m/s
E) 8.9 m/s
Coral reefs are influenced by sea surface temperatures.
Moon orbit
Human Memorabilia in Space
Surface Water Parsing
Earth’s Mineral Resources
Earth as a System: The Hydrologic Cycle