Given the distance x that a spring is compressed, what is the potential energy of the spring?
A. 2 kx^2
B. ½ kx
C. ½ kx^2
D. 2 kx
Ans: C. ½ kx^2
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Which of the following is not an expected consequence of global warming?
A) The entire Earth will warm up by the same amount. B) an increase in the number and/or severity of extreme weather events C) an increase in sea level D) a decrease in summer ice coverage of the Arctic Ocean
The carbon in our bodies was formed in nuclear reactions in long-dead stars. How much energy was released when the right number of 4He nuclei combined to make 12C?
The mass of 4He is 3728.40 MeV/c2 and the mass of 12C is 11,177.93 MeV/c2. A) 7.27 MeV B) 372 MeV C) 8.42 MeV D) 2.11 MeV
Which of the above substances would have the largest dipole?
A) a B) b C) c D) Each has the same size dipole. E) None of the molecules has a dipole.
Tricia puts 66 g of dry ice (solid CO2) into a 2.0-L container and seals the top. The dry ice turns to gas at room temperature (20°C). Find the pressure increase in the 2.0-L container. (One mole of CO2 has a mass of 44 g and R = 0.0821 L•atm/mol•K. Ignore the initial volume of the dry ice.)
a. 6.0 atm c. 18 atm b. 12 atm d. 2.0 atm