The earths gravity pulls on the moon and keeps it in orbit. the moon's gravity a) doesn't affect anything b) pulls back on earth c) pushes the moon away from the earth d) can only pull on smaller objects such as asteroids but has no effect on the earth

The solar panels used by mark function because of the photoelectric effect. light shines on the cells causing electrons to be ejected from the metal, which produces an electric current. at night on mars, no light will fall on the solar cells and no electric current will be generated. according to your notes, what type of light is typically needed to cause the photoelectric effect? a)visible b)ultraviolet c)infrared

Apatient has a history of poor nutrition. he has skin rashes, bleeding gums, and a cut that hasn’t healed in a long time. what vitamin deficiency most likely caused this symptom?

Which of the following is not a physical property of mattera. melting pointb.heat of combustionc. viscosityd. boiling point