When a mercury-in-glass thermometer is placed in boiling water, the mercury level falls slightly at first and then begins to rise. Explain this effect. If you have lab time, perform the experiment. Obtain the lab instructor's permission
Because the mercury is enclosed in the glass bulb, the glass bulb is the first to
become hot and expand. The larger glass volume allows the mercury to fall. Once the
mercury itself begins to receive heat, it expands rapidly and rises again to the
maximum level.
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A race car travels 40 m/s around a banked (45° with the horizontal) circular (radius = 0.20 km) track. What is the magnitude of the resultant force on the 80-kg driver of this car?
a. 0.68 kN b. 0.64 kN c. 0.72 kN d. 0.76 kN e. 0.52 kN
A U-238 nucleus (mass = 238 units) decays, transforming into an alpha particle (mass = 4.00 units) and a residual thorium nucleus (mass = 234 units). If the uranium nucleus was at rest, and the alpha particle has a speed of 1.50 × 10^7 m/s, determine the recoil speed of the thorium nucleus
Energy in Nuclear Reactions: When a neutron collides with a uranium-235 nucleus it can induce a variety of fission reactions. One such reaction is src="https://sciemce.com/media/4/ppg__cp1pbb0313192044__f440g1q11g6.jpg" style="vertical-align: -21.0px;" />Xe: 139.921620 u
U + 
n ? 
Xe + 
Sr + 2 
nThe following mass values are known:
Sr: 93.915367 u
U: 235.043924 u
n: 1.008665 uHow much energy is released in this reaction? (1 u = 931.5 MeV/c2)
A. 185 MeV
B. 202 MeV
C. 32.6 MeV
D. 65.7 MeV
E. 98.6 MeV
In very general terms, how do the temperature structures of the atmospheres of Venus and Mars differ from that of Earth?
A) They lack X-ray absorbing thermospheres. B) They lack ultraviolet-absorbing stratospheres. C) Their atmospheres are similar in structure to Earth's, but with much higher temperatures. D) Temperatures in their tropospheres increase with altitude, rather than decreasing with altitude.