A quantity of mercury occupies 400.0 cm3 at 0°C. What volume will it occupy when heated to 50°C? Mercury has a volume expansion coefficient of 180 × 10-6 K-1
A) 450 cm3
B) 409.7 cm3
C) 403.6 cm3
D) 401.8 cm3
C
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General Questions: You pull on a crate with a rope. If the crate moves, the rope's pull on the crate must have been larger than the crate's pull on the rope, but if the crate does not move, both of these pulls must have been equal.
A. True B. False
Mutual Inductance: Coil A is close to, but not touching, coil B. If a steady counterclockwise 100-A current flows in coil A, what can you say about the induced current in coil B?
A. There will be no induced current in coil B. B. The current in coil B will be equal to 100 A clockwise. C. The current in coil B will be equal to 100 A counterclockwise. D. The current in coil B will be counterclockwise and less than 100 A, but not zero. E. The current in coil B will be clockwise and less than 100 A, but not zero.
Which is heaviest?
A) oxygen atom B) hydrogen atom C) electron D) proton E) water molecule
According to kinetic theory, a typical gas molecule in thermal equilibrium at room temperature has a kinetic energy K = 6.00 × 10^-21 J, regardless of mass. Estimate the speed at room temperature of a hydrogen molecule H2 (m = 3.34 × 10^-27 kg) and a xenon atom (m = 2.00 × 10^-25 kg). [kB = 1.38 × 10^-23 J/K]