Two extremely flat glass plates, 10.0 cm wide, touch at one end but are separated by a thin wire at the other end, forming a wedge
Light with a wavelength of 450 nm shines almost perpendicularly on the glass and forms fringes which are 1.80 mm apart. What is the diameter of the wire?
A) 25.0 µm B) 10.0 µm C) 20.0 µm D) 12.5 µm E) 17.5 µm
D
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If two stars are emitting the same amount of light, the star that is farther will appear dimmer
a. True b. False Indicate whether the statement is true or false
A player hits a ball with a bat. If one part of the interaction is the bat against the ball, the other part is the
A) air resistance on the ball. B) weight of the ball. C) ball against the bat. D) grip of the player's hand against the ball. E) none of the above
Two particles collide, one of them initially being at rest. Is it possible for both particles to be at rest after the collision?
a. If the collision is perfectly inelastic, then this happens. b. If the collision is elastic, then this happens. c. This can happen sometimes if the more massive particle was at rest. d. No.
O and B stars only occur in the galactic _______________
Fill in the blank(s) with correct word