Oceans cover more of Earth's surface than land
Indicate whether the statement is true or false
TRUE
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Polymers, such as epoxy, with cross-links are _____________polymers that do not soften when heated.
Fill in the blank(s) with the appropriate word(s).
Compared to a 50-kg person, a 100-kg person at the beach requires
A) twice as much suntan lotion. B) the same amount of suntan lotion. C) less than twice as much suntan lotion.
The howler monkey is the loudest land animal and, under some circumstances, can be heard up to a distance of 8.9 km. Assume the acoustic output of a howler to be uniform in all directions and that the threshold of hearing is 1.0 × 10-12 W/m2
A juvenile howler monkey has an acoustic output of 63 µW. What is the ratio of the acoustic intensity produced by the juvenile howler to the reference intensity I0, at a distance of 210 m? A) 110 B) 230 C) 76 D) 170 E) 300
A 2.0-kg block slides down a frictionless incline from point A to point B. A force (magnitude P = 3.0 N) acts on the block between A and B, as shown. Points A and B are 2.0 m apart. If the kinetic energy of the block at A is 10 J, what is the kinetic energy of the block at B?
a.
27 J
b.
20 J
c.
24 J
d.
17 J
e.
37 J