Which characteristic is NOT shared by the Moon and Mercury?
a. heavily cratered surface
b. negligible atmosphere
c. rotations altered by tides
d. dense metallic core
e. geologically inactive
d
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The event horizon of a black hole is:
a) the distance at which a star is torn apart by tidal forces b) the minimum distance from which light can escape c) the distance at which a human body is torn apart by tidal forces d) the distance from which we can see inside the black hole e) the point of infinite density.
Two charged particles held a certain distance apart are released. As they move, the force on each particle increases. Therefore, their charges have
A) the same sign. B) opposite signs. C) the same mass. D) the same size. E) need more information
A ball thrown upwards reaches a maximum height and then comes back down to the original level. As the ball is going upwards
a. the velocity and acceleration both point up. b. the velocity points up and the acceleration down. c. the velocity points down and the acceleration up. d. the velocity and acceleration both point down. e. the acceleration is zero.
Single-Slit Diffraction: The figure shows the resulting pattern when a single slit is illuminated by monochromatic light. The slit is 0.3 × 10-3 m wide and is illuminated by light of wavelength 506 nm. A diffraction pattern is seen on a screen 2.8 m from the slit. What is the linear distance on the screen between the first two diffraction minima on either side of the central diffraction maximum?
Fill in the blank(s) with the appropriate word(s).