A helium neon laser generates light of 632.8-nm wavelength. What color is that?
a. blue b. yellow
c. red d. green
c
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Which of the following is a difference between Saturn and Jupiter?
A) Unlike Jupiter, Saturn is rich in hydrogen and helium. B) Saturn has more liquid metallic hydrogen than Jupiter. C) Belts and zones on Saturn are less visible than on Jupiter. D) Unlike Jupiter, Saturn radiates more energy than it receives.
An image seen projected on a screen by a single lens
a. is always erect. b. is always inverted. c. is a real image. d. is a virtual image. e. none of the above
Suppose a wheel is initially rotating at 10.0 rad/s while undergoing constant angular acceleration reaching a speed of 30.0 rad/s after 36.0 seconds have elapsed. How long after the initial time has the wheel undergone half of the angular displacement that it will have gone through during the entire 36.0-second interval?
a. 0.556 s b. 22.2 s c. 18.0 s d. 56.5 s
A damped harmonic oscillator, with a damping force proportional to its speed, is oscillating with an amplitude of 0.500 cm at t = 0
When t = 8.20 s, the amplitude has died down to 0.400 cm. At what value of t will the oscillations have an amplitude of 0.250 cm? A) 18.5 s B) 20.5 s C) 16.5 s D) 25.5 s E) 5.13 s