A European sports car dealer claims that his product will accelerate at a constant rate from rest to a speed of 100 km/hr in 9.00 s. What distance will the sports car travel during the 9.00 s acceleration period? (Hint: First convert speed to m/s.)
a. 55.5 m
c. 111 m
b. 125 m
d. 250 m
B
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Determine the view factors F12 and F21 for the following geometries (as shown in the figure): (a) a sphere of diameter, D, inside a cubic box of length L=D, (b) one side of a diagonal partition in a long square duct of side L, and (c) the end and side of a circular tube with a diameter equal to its length.
GIVEN
Geometrical configurations shown above
FIND
The view factors F12 and F21
SKETCH
The Atacama Large Millimeter Array achieves exceptional resolution by using exceptionally:
A) large radio antennas in a fixed array. B) large radio antennas in a mobile array. C) many radio antennas in a fixed array. D) many radio antennas in a mobile array. E) many portions of the electromagnetic spectrum.
To get the same exposure on the film, when the aperture diameter of a camera lens is doubled, what change should be made in the shutter speed?
A. it should be doubled B. it should be halved C. it should be quadrupled D. it should be quartered E. it should be reduced by a factor of 1.414
The first atomic explosion released approximately 1.0 × 1014 J of energy. How much matter had to be changed into energy to produce this yield?
A) 1.1 g B) 23 g C) 13 g D) 0.45 kg E) 1.1 kg