Which sentence describes an example of sublimation?
a. dew forms on leaves on a cold morning.
b. liquid deodorant sprayed on a person’s body evaporates.
c. dry ice changes to carbon dioxide when kept in an open container.
d. ice cream in a bowl melts.
e. water vapor condenses on a cold surface and forms droplets.

1.what is where an object is located 2. what is how fast an objects speed is changing 3. what is how fast an object is moving

Ethanol has a heat of vaporization of 38.56 kj/mol and a normal boiling point of 78.4 c. what is the vapor pressure of ethanol at 14 c?

Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius r, so that the two stars are always on opposite sides of the circle. (a) find the gravitational force of one star on the other. (b) find the orbital speed of each star and the period of the orbit. (c) how much energy would be required to separate the two stars to infinity?