Photons of blue light
a. have a greater energy than photons of red light.
b. have a greater energy than photons of ultraviolet light.
c. have a lower frequency than photons of red light.
d. have a longer wavelength than photons of red light.
e. travel at a greater speed than photons of red light.
a
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A mass oscillates on the end of a spring, both on Earth and on the Moon. Where is the period the greatest?
A) Earth B) the Moon C) the same on both Earth and the Moon D) Cannot be determined from the information given.
An ammonia molecule is
a. pyramidal and polar. b. pyramidal and nonpolar. c. flat and polar. d. flat and nonpolar.
A ball with a diameter of 20.00 cm is placed in water with 75% of its volume out of the water. The buoyant force of the water on the ball is
A. 16.67 N. B. 14.75 N. C. 13.60 N. D. 12.56 N. E. 10.26 N.
The starship Enterprise locks onto an alien ship (whose mass is much greater than the Enterprise's mass) with its tractor beam (think of this as a futuristic rope) and starts to pull the alien ship toward it. Neither ship has its propulsion engines running. Which ship has greater acceleration towards the other?
A. They both move with equal acceleration B. The alien ship C. The Enterprise D. Neither ship can move because there is no friction in outer space