The half angle of the conical shock wave produced by a supersonic aircraft is 60°. What is the Mach number of the aircraft?
A) 2.0
B) 0.87
C) 1.73
D) 1.15
E)
D
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The focal lengths of the objective lens and the eyepiece in a microscope are 0.29 cm and 2.50 cm, respectively
An object is placed at 0.30 cm from the objective lens and the image of this object is viewed with the eyepiece adjusted for minimum eyestrain for persons with a near point of 25 cm. The magnitude of the final overall magnification of the microscope is closest to A) 100 B) 200 C) 300 D) 410 E) 500
A point charge (5.0 pC) is located at the center of a spherical surface (radius = 2.0 cm), and a charge of 3.0 pC is spread uniformly upon this surface. Determine the magnitude of the electric field 1.0 cm from the point charge
a. 0.72 kN/C b. 0.45 kN/C c. 0.63 kN/C d. 0.90 kN/C e. 0.18 kN/C
Of vectors with lengths 5 m, 3 m, and 4 m, which has the greatest magnitude x component?
a. the one with length 5 m c. the one with length 4 m b. the one with length 3 m d. It could be any of the three.
In the Southern Hemisphere, hurricanes _________ compared to hurricanes in the Northern Hemisphere because of the Coriolis effect.
a. rotate in the same direction b. rotate in the opposite direction c. move from east to west d. have larger wind speeds e. cause more damage