The reason the jovian planets lost very little of their original atmosphere is due to their
A) ring systems.
B) strong magnetic fields.
C) many moons.
D) large mass.
E) rapid rotation.
D
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Suppose you are listening to a radio station that broadcasts at a frequency of 97 Mhz (megahertz). Which of the following statements is true?
A) The radio waves from the radio station are causing electrons in your radio's antenna to move up and down 97 million times each second. B) The radio waves from the radio station have a wavelength of 97 million meters. C) The "radio waves" received by your radio are not light waves like those we talk about in astronomy, but rather are a special type of sound wave. D) The radio station broadcasts its signal with a power of 97 million watts.
When light enters a medium with a higher index of refraction it
A. is absorbed. B. is bent towards the normal. C. continues in the same direction. D. is bent away from the normal.
A 100-? resistor is connected in series with a 10.0-mH inductor across an ac source operating at 1.00 kHz. What is the impedance of this circuit?
A) 100 ? B) 200 ? C) 1000 ? D) 236 ? E) 118 ?
For a long ideal solenoid having a circular cross-section, the magnetic field strength within the solenoid is given by the equation B(t) = 5.0t T,
where t is time in seconds. If the induced electric field outside the solenoid is 1.1 V/m at a distance of 2.0 m from the axis of the solenoid, find the radius of the solenoid. A) 0.94 m B) 9.0 m C) 0.30 m D) 77 m