A supermassive black hole that is erupting____
a. will consume all gas and dust in the galaxy
b. will heat the gas in the cluster until it all escapes
c. is fed by the intergalactic gas of the cluster
d. may push its accretion disk away and choke off the eruption
e. will push other galaxies away from its parent galaxy
d
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In a double-slit experiment, the distance between the slits is 0.2 mm, and the distance to the screen is 150 cm. What wavelength (in nm) is needed to have the intensity at a point 1 mm from the central maximum on the screen be 80% of the maximum intensity?
a. 900 b. 700 c. 500 d. 300 e. 600
Two flat rings each having outer diameter of 6 inches and inner diameter of 3 inches are parallel and 4 inches apart as shown. Determine the shape factors, F1-2 and F2-1, which are equal.
A 50.0-kg block is being pushed up a 15.0° slope by a force of 300 N which is directed 30.0° below the slope. The coefficient of kinetic friction between the block and the slope is 0.200. What is the acceleration of the block?
A) 0.164 m/s2 B) 0.967 m/s2 C) 1.20 m/s2 D) 2.20 m/s2 E) 0.528 m/s2
Jennifer hits a stationary 0.20-kg ball, and it leaves her racket at 40 m/s. Time-lapse photography shows that the ball was in contact with the racket for 40 ms
(a) What average force did the ball exert on the racket? (b) What is the ratio of this force to the gravitational force that Earth exerts on the ball?