A particle starts from the origin at t = 0 with a velocity of 6.0
m/s and moves in the xy plane with a constant acceleration of 
m/s2. At the instant the particle achieves its maximum positive x coordinate, how far is it from the origin?
A. 36 m
B. 20 m
C. 45 m
D. 27 m
E. 37 m
Answer: B
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Standing Sound Waves: In a resonating pipe that is open at one end and closed at the other end, there
A. are displacement nodes at each end. B. are displacement antinodes at each end. C. is a displacement node at the open end and a displacement antinode at the closed end. D. is a displacement node at the closed end and a displacement antinode at the open end.
An electron is moving with the speed of 1780 m/s. What is its de Broglie wavelength?
A) 409 nm B) 302 nm C) 205 nm D) 420 nm E) 502 nm
Camera #1 has a lens with f-number 11 and camera #2 has a lens with f-number 2.8. Which camera has the faster lens (i.e., it can take a properly exposed picture with the shortest exposure time), and which camera will give the greatest depth of field (i.e., the widest range of distances with sharp images)?
1.#1, #1 2.#2, #2 3.#1, #2 4.#2, #1
The diurnal rotation of the stars refers to the
A) apparent rotation of the celestial sphere due to the rotation of the Earth. B) movement of the stars across the sky during daytime hours. C) rate of spin of stars in their formation stage. D) particular constellations that are visible in different times of the year.