A solid object has a volume density ?0 at a temperature of 315 K. The coefficient of volume expansion for the material of which it is made is 7.00 × 10-5 K-1
What will be its density (in terms of ?0 at a temperature of 425 K, assuming that it does not melt and that its thermal properties do not change with temperature?
0.992 ?0
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What causes synchronous rotation?
A) Most jovian moons were formed out of their planet's nebula with the same rotational period as their parent planet. B) Most jovian moons were formed out of their planet's nebula with the same orbital period. C) A massive planet exerts a tidal force on a moon that causes the moon to obtain the same rotational period as its parent planet. D) A massive planet exerts a tidal force on a moon that causes the moon to align itself such that its tidal bulges always point toward and away from the planet. E) orbital resonances with other moons
Determine the work done by 5 moles of an ideal gas that is kept at 100°C in an expansion from 1 liter to 5 liters
a. 2.5 × 10^4 J b. 1.1 × 10^4 J c. 6.7 × 10^3 J d. 2.9 × 10^3 J e. 8.4 × 10^3 J
Resistance and Resistivity: If a quantity you calculated has units of 
what is that quantity?
A. potential B. resistivity C. resistance D. capacitance E. current
A strobe photograph of a car moving along a straight road shows the interval between each successive image to be diminishing. If the direction of motion of the car is taken as positive, which of the following are negative?
a. the speed of the car c. the average acceleration of the car b. the average velocity of the car d. all of the above