A closed 2.0-L container holds 3.0 mol of an ideal gas. If 190 J of heat is added, what is the change in internal energy of the system?
a. zero
b. 140 J
c. 165 J
d. 190 J
e. 240 J
d
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A car traveling at constant speed has a net work of zero done on it.
Answer the following statement(s) true (T) or false (F)
On its own, a certain tow-truck has a maximum acceleration of 3.0 m/s2. What would be the maximum acceleration when this truck was towing a bus of twice its own mass?
A) 2.5 m/s2 B) 2.0 m/s2 C) 1.5 m/s2 D) 1.0 m/s2
The fact that all cells used in life on Earth are based on the same biochemistry suggests that
A) life originated from a variety of sources B) life on Earth was created by some omnipotent being C) all life on Earth shares a common ancestor D) the biochemistry of life on Earth is universal
A particular lightbulb produces 8 J of thermal energy while producing 2 J of radiant energy, and this is its entire energy output during this time. How energy-efficient is this bulb [as a producer of light]?
A) 400% B) 20% C) 25% D) 500% E) 80%