Most meteor showers occur ________, as we again intersect the comet's orbit
Fill in the blank(s) with correct word
annually
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Why do solutions for temperature distributions in heat conduction problems need to converge?
What will be an ideal response?
How are rotation curves of spiral galaxies determined beyond radii where starlight can be detected?
A) by extrapolation B) through observations of the 21 cm line of atomic hydrogen C) through observations of spectral lines of dark matter D) by watching the galaxies rotate over a period of years E) by measuring the broadening of absorption lines
A 10-kg block is pushed across a friction-free horizontal surface with a horizontal force of 20 N. The acceleration of the block is
A) 1 m/s2. B) 2 m/s2. C) 5 m/s2. D) 10 m/s2. E) none of the above
A conducting rod (length = 80 cm) rotates at a constant angular rate of 15 revolutions per second about a pivot at one end. A uniform field (B = 60 mT) is directed perpendicularly to the plane of rotation. What is the magnitude of the emf induced between the ends of the rod?
a. 2.7 V b. 2.1 V c. 2.4 V d. 1.8 V e. 3.3 V