Two tanks of gas, one of hydrogen, H2, and one of helium, He, contain equal numbers of moles of gas. The gram-molecular mass of He is twice that of H2 . Both tanks of gas are at the same temperature, 293 K. Which statement(s) below is(are) correct when we ignore vibrational motion?
a. The total internal energy of the hydrogen is the same as that of the helium.
b. The total internal energy of the hydrogen is 1.4 times that of the helium.
c. The total internal energy of the helium is 1.4 times that of the hydrogen.
d. The total internal energy of the hydrogen is 1.67 times that of the helium.
e. The total internal energy of the helium is 1.67 times that of the hydrogen.
d
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A coil with a self-inductance of 6.0 H has a constant current of 2.0 A flowing through it for 2.0 s. What is the emf induced in this coil?
A) 6.0 V B) 12 V C) 0.0 V D) 4.0 V E) 8.0 V
The uncertainty principle was formulated by
A. Einstein. B. Bohr. C. Heisenberg. D. Planck. E. Dirac.
A mass of 2.0 kg hangs from a spring with a force constant of 50 N/m. An oscillating force F = (4.8 N) cos[(3.0 rad/s)t] is applied to the mass. What is the amplitude of the resulting oscillations? Neglect damping
A) 0.15 m B) 0.30 m C) 1.6 m D) 2.4 m E) 0.80 m
Stars with a mass of about 0.5 to 8 solar masses evolve differently than other mass ranges because ____
a. their interior structure is controlled by radiative energy transport b. they will never reach the temperature needed to ignite carbon fusion c. their interior structure is controlled by convective energy transport d. they have strong stellar winds throughout their main-sequence lifetimes e. they will never reach the temperature required to establish a helium-fusion shell