A single slit, which is 0.0500 mm wide, is illuminated by light of 550 nm wavelength. What is the angular separation between the first two minima on either side of the central maximum?
What will be an ideal response?
0.630°
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Most stars generate their energy by the thermonuclear fusion of ____________________ to form ____________________
Fill in the blank(s) with correct word
Why is the greenhouse effect weaker on Mars than on Earth or Venus?
A. High water vapor clouds reduce the amount of sunlight that reaches the planet's surface. B. There is no carbon dioxide in Mars's atmosphere. C. Mars's atmosphere is much thinner than those of Venus and Earth. D. Fog and frost on the Martian surface reflect much of the Sun's energy.
The percentage (by mass) of the Sun that is helium is about:
A) 91%. B) 71%. C) 27%. D) 9%. E) less than 1%.
As an object moves from point A to point B only two forces act on it: one force is nonconservative and does ?30 J of work, the other force is conservative and does +50 J of work. Between A and B, a. the kinetic energy of object increases, mechanical energy decreases
b. the kinetic energy of object decreases, mechanical energy decreases. c. the kinetic energy of object decreases, mechanical energy increases. d. the kinetic energy of object increases, mechanical energy increases. e. None of the above.