Explain why, in terms of photons, ultraviolet light can damage cells in your skin but visible light cannot
A) Ultraviolet photons have a smaller uncertainty in position.
B) Ultraviolet photons have more energy.
C) Ultraviolet photons move faster.
D) Ultraviolet photons have a smaller uncertainty in energy.
E) Ultraviolet photons have a longer wavelength.
B
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Power: Rita raises a 10kg package to a height of 2.5 m in 2.0 s.(a) How much work did she do on the package?(b) How much power was expended on the package?(c) If she were to raise the package in 1.0 s rather than 2.0 s, how do the work and power change?
What will be an ideal response?
What does Einstein's general theory of relativity tell us about two co-orbiting white dwarfs?
A) They will emit gravitational waves that carry energy and angular momentum away from the system, causing the white dwarfs to gradually spiral inward toward each other and eventually merge. B) They will emit gravitational waves that carry energy and angular momentum toward the system, causing the white dwarfs to gradually spiral away from one another and eventually fly far apart. C) They will emit gravitational waves that carry energy and angular momentum away from the system, causing the white dwarfs to quickly spiral away from one another. D) They will never interact with one another.
Describe how to find the cumulative effect of two or more forces acting on an object
What would be an ideal response?
Clovis wants to lose weight. Clotilde tells him that he will be thin enough for her if he travels past her at 0.600 c. If the distance she sees from the front of his stomach to his back is then 24.0 cm, what distance in cm does she see when he is standing still?
a. 15.4 b. 19.2 c. 24.0 d. 30.0 e. 37.5