A heavy object and a light object in a vacuum are dropped at the same time from rest. The heavy object reaches the ground
A) sooner than the light object.
B) at the same time as the light object.
C) later than the light object.
Answer: B
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A transformer is a device used to
A) transform an alternating current into a direct current. B) transform a direct current into an alternating current. C) increase or decrease an ac voltage. D) increase or decrease a dc voltage.
An expandable container holds 2.30 mole of He gas with an initial pressure of 770 kPa and an initial volume of 2.10 L. The gas expands isothermally to a final pressure of 350 kPa. How much heat is gained by the gas in this process?
A) 1280 J B) 792 J C) 685 J D) 1370 J E) 1700 J
Which of the Jovian planets has a giant circulating storm that called the Great Red Spot that has lasted for centuries?
a. Pluto b. Uranus c. Neptune d. Saturn e. Jupiter
Which of the following change when the pressure of an ideal gas is changed isothermally?
A. Mean free path B. Root-mean-square molecular speed C. Internal energy D. Most probable kinetic energy E. Average speed