A telescope whose objective is a lens and contains no mirrors is a(n) ____ telescope
a. Refracting
b. Reflecting
c. Deflecting
d. Compound
e. Retracting
A
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Power: A battery is rated such that it provides 1.0 mW of power at 9.0 V when fully charged. How much current can it deliver?
A. 0.11 mA B. 81 kA C. 0.33 mA D. 9.0 kA
While flying horizontally in an airplane, you notice that a string dangling from the overhead luggage compartment hangs at rest at 15° away from the vertical toward the front of the plane
Using this observation, you can conclude that the airplane is A) moving forward. B) accelerating forward. C) not accelerating because the string is at rest. D) accelerating backward. E) moving backward.
Star #1 is approaching the Earth with speed v. Star #2 is receding from the Earth with the same speed v. Measurements of the same spectral line from each of the stars show Doppler shifts in frequency. The light from which star will have the larger magnitude shift in frequency?
a. star #1 b. Both stars will have the same shift. c. The value of the speed must be known before an answer can be found. d. star #2
A 5.00-kg ball is hanging from a long but very light flexible wire when it is struck by a 1.50-kg stone traveling horizontally to the right at 12.0 m/s
The stone rebounds to the left with a speed of 8.50 m/s, and the ball swings to a maximum height h above its original level. The value of h is closest to A) 3.69 m. B) 0.0563 m. C) 1.93 m. D) 1.10 m. E) 2.20 m.