125 g of dry ice (solid CO2) is dropped into a beaker containing 600 g of 64.0°C water. The dry ice converts directly to gas, leaving the solution. When the dry ice is gone, the final temperature of the water is 33.2°C. What is the heat of vaporization of solid CO2? (cwater = 1.00 cal/g/°C)
a. 160 cal/g
b. 142 cal/g
c. 118 cal/g
d. 148 cal/g
e. 154 cal/g
d
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______________ dating is used specifically to establish the absolute age of organic remains
Fill in the blank(s) with correct word
A star has an apparent visual magnitude of +19 . Which will you need to see this star?
a. naked eye b. binoculars c. telescope like Hubble Space Telescope d. All of the other choices can be used.
The angle or arc distance of a point on the celestial sphere from the zenith is called the ______________ angle
Fill in the blank(s) with correct word
A dictator has built a bunker for his use in emergencies. Its dimensions are shown below. When it floods to ground level during a tropical storm, the gauge pressure at point A, in Pa, is
a.
3.92 × 105.
b.
4.90 × 105.
c.
5.39 × 105.
d.
5.88 × 105.
e.
6.89 × 105.