Ultraviolet radiation from a star
a. will not penetrate Earth's atmosphere and reach the ground.
b. has a wavelength that is longer than the visible light emitted by the star.
c. has a wavelength that is shorter than the X-rays emitted by the star.
d. will not penetrate Earth's atmosphere and reach the ground and has a wavelength that is longer than the visible light emitted by the star.
e. has a wavelength that is longer than the visible light emitted by the star and has a wavelength that is shorter than the X-rays emitted by the star.
a
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The Cosmological Principle states that
A. the Universe began as a hot violent event. B. the expansion of the Universe is speeding up. C. there is not a preferred location in the Universe. D. the laws of physics apply everywhere in the Universe. E. the Universe will continue to expand forever.
For a beam of light, the direction of polarization is defined as
A) the beam's direction of travel. B) the direction of the electric field's vibration. C) the direction of the magnetic field's vibration. D) the direction that is mutually perpendicular to the electric and magnetic field vectors.
A cyclist does work at the rate of 500. W while riding. With how much average horizontal force does the wheel push when she is traveling at 10. m/s?
What will be an ideal response?
A ball is allowed to drop from rest. If the upward direction is positive, then after 2 seconds its velocity will be
A. 9.8 m/s. B. -9.8 m/s. C. -19.6 m/s. D. 19.6 m/s.