What accounts for an increase in the temperature of a gas that is kept at constant volume?
a. energy has been removed as heat from the gas.
b. energy has been added as heat to the gas.
c. energy has been removed as work done by the gas.
d. energy has been added as work done by the gas.

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value