How tall is Mount Everest, according to a cosmic ray muon, a subatomic particle traveling straight down toward the Earth at 0.99c? On Earth, the height of Mt. Everest is viewed to be 8846 m.
A. 885 m
B. 6.29 km
C. 1.25 km
D. 176 m
C. 1.25 km
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A basketball player can jump 1.6 m off the hardwood floor. With what upward velocity did he leave the floor?
a. 5.8 m/s b. 2.8 m/s c. 5.4 m/s d. 5.6 m/s e. 11 m/s
Suppose there are 3 molecules in a container. If each molecule has a 1-in-2 chance of being in the left half of the container, what is the probability that there are exactly 2 molecules in the left half of the container?
a. 1/2 b. 1/3 c. 1/8 d. 3/8 e. 3/5
For fully turbulent flow in a long tube of diameter D, develop a relation between the ratio (L/?T)/D in terms of flow and heat transfer parameters, where L/?T is the tube length required to raise the bulk temperature of the fluid by ?T for fluids with Prandtl number of the order of unity or larger for liquid metals.
GIVEN
Fully developed turbulent flow in a long tube
Diameter = D
L/? T = Tube length required to raise the bulk temperature by ? T
FIND
A relationship for (L/?T)/D in terms of flow and heat transfer parameters using
(a) Equation 7.61 for fluids with Pr = 1
(b) liquid metals
ASSUMPTIONS
Steady state
Constant fluid properties
Uniform wall temperatures
SKETCH
A 120-V rms voltage at 1000 Hz is applied to a series LRC circuit with an equal value of inductive and capacitive reactance and a 200-? resistance. What is the impedance of this circuit?
A) 100 ? B) 0 ? C) 240 ? D) 120 ? E) 200 ?