An industrial flywheel has a greater rotational inertia when most of its mass is
A) nearer the rim.
B) nearer the axis.
C) uniformly spread out as in a disk.
Answer: A
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What will be an ideal response?
How many planet Earths could fit inside the Sun?
A) 110 B) about a thousand C) a little over a million D) almost ten million E) close to a billion
If you lift a 15-N weight vertically 30 m above the ground, you are
a. doing work against gravity. b. doing work against friction. c. doing work against inertia. d. doing none of these.
How much heat is required to raise the temperature of a 225-g lead ball from 15.0°C to 25.0°C? The specific heat of lead is 128 J/kg ? K
A) 725 J B) 576 J C) 145 J D) 217 J E) 288 J