Which of the following is a gas?
A) lithium
B) carbon
C) neon
D) sodium
Answer: C
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Specific Heat: A 920-g empty iron kettle is put on a stove. How much heat in joules must it absorb to raise its temperature form 15.0°C to 93.0°C? The specific heat for iron is 113 cal/kg ? C°, and 1 cal = 4.186 J.
A. 33,900 J B. 40,500 J C. 8110 J D. 40,100 J
According to the nebular theory of solar system formation, why were solid planetesimals able to grow larger in the outer solar system than in the inner solar system?
A) because only metal and rock could condense in the inner solar system, whereas ice also condensed in the outer solar system B) because the Sun's gravity was stronger in the outer solar system, allowing more solid material to collect C) because gas in the outer solar system contained a larger proportion of rock, metal, and hydrogen compounds than the gas in the inner solar system D) because only the outer planets captured hydrogen and helium gas from the solar nebula
How many revolutions per second are needed for a centrifuge to produce an acceleration of 1 200g at a radius arm of 15.0 cm?
a. 0.0280 rev/s b. 44.6 rev/s c. 14.2 rev/s d. 6.68 rev/s
Exhibit 16-1
A graph of position versus time for an object oscillating at the free end of a horizontal spring is shown below.
?
?
Use this exhibit to answer the following question(s).
Refer to . The point at which the object has zero velocity and negative acceleration is
a.
A
b.
B
c.
C
d.
D
e.
E