The extended sheet of galaxies that spans 70 Mpc × 200 Mpc and includes about 24,000 galaxies is called the ________
Fill in the blank(s) with correct word
Great Wall
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A 3.00-kg copper rod is 45.0 cm long at 24.8°C. If 45 000 J are transferred to the rod by heat, what is its change in length? ccopper = 387 J/kg/°C and ?copper = 17.0 × 10^?6/°C
a. 34.4 cm b. 0.0297 cm c. 0.133 cm d. 0.0445 cm e. More information is needed.
Which of these is the ideal gas law that relates the temperature T, pressure P, and volume V of n moles of ideal gas consisting of N molecules?
a. PV = nRT b. P = nRTV c. PVn = RT d. P = VRT e. PV = NRT
Strictly speaking, gas pressure inside an inflated stretched balloon is
A) less than air pressure outside the balloon. B) equal to air pressure outside the balloon. C) slightly greater than air pressure outside the balloon.
The percentage by mass of hydrogen in methane, CH4, is about
a. 25%. b. 75%. c. 80%. d. 20%.