FM radio only operates in the frequency range 88 MHz to 108 MHz because
a. higher or lower frequencies are blocked by the ionosphere.
b. higher and lower frequencies are not radio waves.
c. the government set those limits.
d. none of the above
c
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When a charged particle is moved along an electric field line,
a. the electric field does no work on the charge. b. the electrical potential energy of the charge does not change. c. the electrical potential energy of the charge undergoes the maximum change in magnitude. d. the voltage changes, but there is no change in electrical potential energy. e. the electrical potential energy undergoes the maximum change, but there is no change in voltage.
A solid solution of two or more metals is called a(n) ______________
Fill in the blank(s) with correct word
A wooden block A of mass 4.0 kg slides on a frictionless table when pulled using a massless string and pulley array by a hanging box B of mass 5.0 kg, as shown in the figure
What is the acceleration of block A as it slides on the frictionless table? Hint: Think carefully about the acceleration constraint. A) 4.1 m/s2 B) 3.5 m/s2 C) 3.1 m/s2 D) 2.7 m/s2
A photocathode having a work function of 2.4 eV is illuminated with monochromatic light whose photon energy is 3.4 eV
What is maximum kinetic energy of the photoelectrons produced?(c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J) A) 1.6 × 10-19 J B) 3.8 × 10-19 J C) 4.4 × 10-19 J D) 4.9 × 10-19 J E) 5.4 × 10-19 J