If you wanted to know how much the temperature of a particular piece of material would rise when a known amount of heat was added to it, which of the following would be most helpful to know?
A) Initial temperature
B) Specific heat
C) Density
D) Coefficient of linear expansion
E) Thermal conductivity
B
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The time derivative of a vector is a:
A. Either a scalar or a vector. B. Tensor. C. Scalar. D. Vector.
In a certain electroplating process gold is deposited by using a current of 14.0 A for 19 minutes. A gold ion, Au+, has a mass of approximately 3.3 × 10-22 g. How many grams of gold are deposited by this process?
A) 33 g B) 16 g C) 22 g D) 28 g E) 97 g
Equilibrium: An 82-kg painter stands on a long horizontal board 1.55 m from one end. This 27-kg board is uniform, 5.5 m long, and supported at each end by vertical posts.(a) What is the magnitude of the total force provided by both posts?(b) With what force does the post that is closest to the painter push upward on the board?
Fill in the blank(s) with the appropriate word(s).
What is a white dwarf?
A) the exposed core of a dead star, supported by electron degeneracy pressure B) the exposed core of a dead star, supported by neutron degeneracy pressure C) a hot, but very small main-sequence star with a mass of less than 1.4 solar masses D) a cool and very small main-sequence star with a mass of less than 1.4 solar masses E) the name for the singularity at the center of a black hole