State the Law of Conservation of Linear Momentum
What will be an ideal response?
When the net external force on a system of objects is zero, the total momentum of the system remains constant.
OR
The total momentum of an isolated system of objects remains constant.
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Two cylinders, one made of lead (density 11340 
and one of copper (density 8940
have the same radius and height. When thrown into a pool of water (density 1000
as the two are sinking to the bottom, describe the buoyant forces on the cylinders.
A. The buoyant force on the lead cylinder is greater than that on the copper. B. There is no buoyant force on either, as they are sinking. C. The buoyant force on the copper cylinder is greater than that on the lead. D. The buoyant force is the same on each cylinder.
_____ say that certain things cannot be created out of nothing or vanish into nothing
A) Conservation laws B) Laws of kinematics C) Laws of planetary motion D) Illuminance laws
Why do we say that the Doppler technique gives the planet's "minimum mass"?
A) The size of the Doppler shift that we detect depends on whether the planet's orbit is tilted. B) The size of the Doppler shift that we detect depends on knowing the star's mass, which can be very uncertain. C) Extrasolar planets are always increasing in mass. D) Doppler measurements are very difficult, producing noisy data that often cause astronomers to underestimate a planet's mass.
A hydrogen atom is in the 6h state. Which one of the following is not a magnetic quantum number for that state?
A) 0 B) 1 C) 2 D) 4 E) 6