A pendulum bob on the end of a 1 m long piece of string is pulled 2 cm from its equilibrium position and it is released. In one full cycle of its motion, through what total distance does it travel?
1.2 cm
2.1/2 cm
3.4 cm
4.8 cm
4
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The magnetic field of a plane-polarized electromagnetic wave moving in the z-direction is given by 
in SI units. What is the wavelength of the EM wave?
A. 120 m B. 240 m C. 60 m D. 100 m E. 360 m
In a collision between two objects having unequal masses, how does magnitude of the impulse imparted to the lighter object by the heavier one compare with the magnitude of the impulse imparted to the heavier object by the lighter one?
A) The lighter object receives a larger impulse. B) The heavier object receives a larger impulse. C) Both objects receive the same impulse. D) The answer depends on the ratio of the masses. E) The answer depends on the ratio of the speeds.
Reconsider the heat exchanger of Problem 6.38 with an inline tube arrangement, where the centerlines of the tubes are spaced 7.5 cm apart, both in the longitudinal and transverse directions. Compare the results with those for the staggered tube arrangement and comment upon the difference. Also, which of the two arrangements is expected to have a larger pressure drop?
GIVEN
• Air flow through a tube bank
• Tube spacing (S) = 7.5 cm = 0.075 m
• Air temperature (Ta) = 60°C
• Air velocity (Us) = 1 m/s
• Tube outside diameter (D) = 6 cm = 0.06 m
• Tube wall temperature (Tw) = 117°C FIND
• The average heat transfer coefficient ( ch )
• Steady state
SKETCH
A hologram is produced from the ________ of a reference beam and an object beam.
Fill in the blank(s) with the appropriate word(s).