A black hole is Question 12 options: an object so diffuse that light leaving it is bent totally back to center of the universe. an object so diffuse that light approaching it is blocked from view. an object so dense that light leaving it is bent totally back to the nearest star. an object so dense that light leaving it is bent totally back to the object.

Which of these is constant for all types of electromagnetic radiation in a vacuum? select one: a. wavelength b. frequency c. photon energy d. amplitude e. velocity

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?

Abag of potato chips contains 2.00 l of air when it is sealed at sea level at a pressure of 1.00 atm and a temperature of 20.0 deg c. what will be the volume of the air in the bag if you take it with you, still sealed, to the mountains where the temperature is 7.00 deg c and atmospheric pressure is 70.0 kpa? assume that the bag behaves like a balloon and that the air in the bag is in thermal equilibrium with the outside air.