Population I stars came billions of years before Population II stars
Indicate whether the statement is true or false
FALSE
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What is the radius of curvature of the path of a 3.0-keV proton in a perpendicular magnetic field of magnitude 0.80 T?
a. 9.9 mm b. 1.1 cm c. 1.3 cm d. 1.4 cm e. 7.6 mm
How do the tides slow the rotation of Earth?
A. Tidal bulges move mass away from the center of Earth, slowing its rotation like a figure skater. B. The tip in the Moon's orbital plane makes moving the tidal bulges away from the equator more difficult. C. Alternating high and low tides create a wobble in Earth's rotation. D. Tidal bulges generate drag forces between Earth and its water, slowing its rotation.
The brakes in a car work because of
a. Archimedes' principle. b. Pascal's principle. c. Bernoulli's principle. d. Torricelli's principle. e. none of these principles.
What is the change in entropy (DS) when two moles of silver (108 g/mole) is completely melted at 961°C? (The heat of fusion of silver is 8.82 × 10^4 J/kg.)
a. 5.53 J/K c. 15.4 J/K b. 7.72 J/K d. 12.1 J/K