Two ice skaters, one with a mass of 45 kg and the other with a mass of 60 kg, push off against one another starting from a stationary position. After they have pushed off, the relative speed at which they separate is 0.600 m/s. What is the speed of the 60-kg skater?
A) 0.343 m/s
B) 0.257 m/s
C) 0.375 m/s
D) 0.750 m/s
E) 0.225 m/s
B
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The Bohr condition for determining the stable orbits in hydrogen can be explained in terms of ________ for the electron (two words).
Fill in the blank(s) with the appropriate word(s).
Monochromatic light is incident on a grating that is 75 mm wide and ruled with 50,000 lines. The second-order maximum is seen at 32.5°. What is the wavelength of the incident light?
A) 202 nm B) 605 nm C) 452 nm D) 403 nm E) 806 nm
Suppose an artificial satellite has been put into circular orbit about the Earth, at a distance from the center of the Earth equal to 1/4 the distance from the Earth's center to the Moon's center. In terms of the Moon's period Tm, what will be the period of the satellite?
A. 8 Tm. B. Tm/16. C. Tm/8. D. 16 Tm. E. Tm.
A proton (mass = 1.67 × 10?27 kg, charge = 1.60 × 10?19 C) moves from point A to point B under the influence of an electrostatic force only. At point A the proton moves with a speed of 60 km/s. At point B the speed of the proton is 80 km/s. Determine the potential difference VB?VA.
A. +15 V B. ?15 V C. ?33 V D. +33 V E. ?20 V