A spaceship, traveling at 0.100c away from a stationary space platform, launches a secondary rocket towards the station, with a speed of 0.560c relative to the spaceship. What is the speed of the secondary rocket relative to the space platform?
A) 0.460c
B) 0.487c
C) 0.492c
D) 0.660c
B
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Free Fall: An astronaut stands by the rim of a crater on the Moon, where the acceleration of gravity is 1.62 m/s2 and there is no air. To determine the depth of the crater, she drops a rock and measures the time it takes for it to hit the bottom. If the time is 6.3 s, what is the depth of the crater?
A. 10 m B. 14 m C. 26 m D. 32 m E. 38 m
the greater average kinetic energy per molecule,
A. The quantity is greater for gas A. B. The quantity is greater for gas B. C. The quantity is the same for both gases. D. One does not know enough to compare the quantities.
Water flows through a horizontal pipe of cross-sectional area 10. cm2 at a pressure of 0.25 atm. The flow rate is 1.0 L/s. At a valve, the effective cross-sectional area of the pipe is reduced to 5.0 cm2. What is the pressure at the valve?
A) 7.7 × 103 Pa B) 0.200 atm C) 0.112 atm D) 0.235 atm E) 0.157 atm
Determine how well the above data are predicated by the appropriate correlation given in the text. Express your results in terms of the per cent difference between the experimentally determined Nusselt number and that from the equation.
An experiment was conducted in which the heat transfer from a sphere in sodium was
measured. The sphere, 0.5 in. in diameter was pulled through a large sodium bath at a
given velocity while an electrical heater inside the sphere maintains the temperature at a
set point. The following table gives the results of the experiment
GIVEN
A sphere is pulled through a sodium bath at a given velocity
Sphere diameter = 0.5 in. = 0.0127 m
Sphere temperature is kept constant
Experimental data given above
FIND
The standard deviation between the data and the appropriate correlation
SKETCH
