A barge loaded with lumber and iron ore floats in a lock by a dam (a closed pool of water like a big swimming pool). If some of the cargo is thrown overboard, the level of water in the lock will
A) rise.
B) drop.
C) stay the same.
D) rise, provided it is lumber that is thrown overboard.
E) rise, provided it is iron ore that is thrown overboard.
C
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The force that accelerates the orange and apple system featured in your textbook is actually supplied by the
A) apple. B) orange. C) floor.
The higher the temperature of an object, the
A) longer the wavelengths it radiates. B) shorter the wavelengths it radiates. C) makes no difference in the wavelengths it radiates
You find yourself in a maelstrom, whipped by winds gusting at 10,000 km/hr, rising and falling in convective currents
On the rare occasions when you can assess your surroundings, you notice a horizon that seems to go on "forever" (or, at least, much farther than the horizon on Earth), and no solid surface anywhere. You get a glimpse of several large moons. The Sun races through your sky, requiring only about 5 hours to rise nearly due east, cross the meridian at an altitude of about 55° in the north, and then set due west.
Exhibit 13-1
Two blocks of masses m1 and m2 are connected by a light cord that passes over a pulley of mass M, as shown. Block m2 slides on a frictionless horizontal surface. The blocks and pulley are initially at rest. When m1 is released, the blocks accelerate and the pulley rotates.
?
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Use this exhibit to answer the following question(s).
Refer to . The total angular momentum of the system of the two blocks and the pulley relative to the axis of rotation of the pulley is
a.
proportional to the radius of the pulley.
b.
proportional to the speed of the blocks.
c.
proportional to the length of the string.
d.
to all of the above.
e.
only to (a) and (b) above.