A jet traveling at 1500 km/h passes overhead. The sonic boom produced is heard by
A) a listener on the ground.
B) the jet pilot.
C) both of these
D) neither of these
Answer: A
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________ occurs when an electron in an atom jumps from a lower energy orbital to a higher energy orbital.
A. Acceleration B. Ionization C. Relaxation D. Excitation
The light-year is defined to be the
A) time it takes light to travel from the Sun to the Earth B) time it takes for light to travel from the nearest star to the Earth C) distance light travels in one year in space D) average distance between the Earth and the nearest star
In an inertia balance, a body supported against gravity executes simple harmonic oscillations in a horizontal plane under the action of a set of springs. If a 1.00 kg body vibrates at 1.00 Hz, a 2.00 kg body will vibrate at
a. 0.500 Hz. b. 0.707 Hz. c. 1.00 Hz. d. 1.41 Hz. e. 2.00 Hz.
Charge of uniform surface density (4.0 nC/m2) is distributed on a spherical surface (radius = 2.0 cm). What is the total electric flux through a concentric spherical surface with a radius of 4.0 cm?
a. 2.8 N × m2/C b. 1.7 N × m2/C c. 2.3 N × m2/C d. 4.0 N × m2/C e. 9.1 N × m2/C