In general, as a telescope's diameter increases, its angular resolution ________
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increases or improves
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A race track is constructed such that two arcs of radius 80 m at A and 40 m at B are joined by two stretches of straight tracks as in the figure. In a particular trial run, a driver traveled at a constant speed of 50 m/s for one complete lap. In this case, the ratio of the centripetal acceleration at A to that at B is
An alpha particle is moving at a speed of 5.0 × 105 m/s in a direction perpendicular to a uniform magnetic field of strength 0.040 T. The charge on an alpha particle is 3.2 × 10-19 C and its mass is 6.6 × 10-27 kg
(a) What is the radius of the path of the alpha particle? (b) How long does it take the alpha particle to make one complete revolution around its path?
A car approaches you at a constant speed, sounding its horn, and you hear a frequency of 76 Hz
After the car goes by, you hear a frequency of 65 Hz. What is the frequency of the sound emitted by the horn? The speed of sound in the air is 343 m/s. A) 68 Hz B) 69 Hz C) 70 Hz D) 71 Hz E) 72 Hz
A star's motion across the sky is its ________ motion
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