All stars have roughly the same luminosity after the helium flash
Indicate whether the statement is true or false
TRUE
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The mass of a neutron star is
a. several time that of the Sun. b. about the same as that of the Sun. c. about the same as Earth. d. smaller than any of these.
How would we view time (clocks) on the spaceship as it goes by?
A) Time is the same for everyone. B) Their clocks are going at the same rate as ours. C) Their clocks are going exactly half as fast as ours. D) Their clocks are going faster than ours. E) Their clocks are going slower than ours.
In a problem using energy considerations to solve for the speed of a ball thrown from the top of a building when it strikes the ground below, where should the potential energy have its zero value?
a. It should be at the level from where the ball is thrown. b. It should be at the ground level where the ball hits. c. It should be slightly below ground level so the potential energy is always positive. d. It doesn't matter since only differences in potential energy matter in solutions.
A metallic sheet has a large number of parallel slits, 5.0 mm wide and 20 cm apart. This sheet is used as a diffraction grating for microwaves
A wide parallel beam of microwaves is incident normally on the sheet. If the intensity maxima occur 2.0° apart in the central region, what is the wavelength of the microwaves? A) 9.0 mm B) 7.0 mm C) 6.0 mm D) 5.0 mm E) 8.0 mm