If a hydrogen emission line appears at 656.2 nm in the laboratory, what can we say about a cloud of hydrogen gas with this same emission line at 680.2 nm?
A) The location of the emission line has nothing to do with speed.
B) It is neither receding nor approaching us.
C) It is approaching us.
D) It is receding away from us.
D
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When is the angular momentum of a system constant?
A) Only when its total kinetic energy is constant. B) Only when the linear momentum and the energy are constant. C) Only when no net external torque is exerted on the system. D) Only when the moment of inertia is constant.
Austenitic stainless steel _________ ferromagnetic.
Fill in the blank(s) with the appropriate word(s).
When you vigorously shake a can of chicken broth, you
A) are doing work on the broth. B) increase the temperature of the broth. C) both of these D) neither of these
Specific heat capacity of ice = 2,000 J/kg-°C latent heat of fusion of water = 334,000 J/kg specific heat capacity of water = 4,000 J/kg-°C The 1 kg block of ice melts into water. The amount of heat absorbed by the ice as it melts is 334,000 J
a. True b. False Indicate whether the statement is true or false