Another name for a pulsar is _______________
a. neutron star
b. black hole
c. quasar
d. red giant
a
You might also like to view...
You measure Cepheid variables in galaxy A and galaxy B. Both Cepheids have the same period, but the one in galaxy B appears 16 times brighter than the other. You conclude
A. Galaxy B is 16 × 16 = 256 times more distant that galaxy A. B. Galaxy A is 16 × 16 = 256 times more distant that galaxy B. C. Galaxy A is 4 times more distant than galaxy B. D. Galaxy B is 4 times more distant than galaxy A. E. Galaxy B is 16 times more distant than galaxy A.
The point P lies along the perpendicular bisector of the line connecting two long straight wires S and T perpendicular to the page. A set of directions A through H is shown next to the diagram. When the two equal currents in the wires are directed into the page, the direction of the magnetic field at P is closest to the direction of
A. A B. B. C. C. D. D. E. E.
In a perfectly elastic collision, a 400-g ball moving toward the east at 3.7 m/s suddenly collides head-on with a 200 g ball sitting at rest
(a) Determine the velocity of the first ball just after the collision. (b) Determine the velocity of the second ball just after the collision. (c) Is kinetic energy conserved in this collision? How do you know?
The photoreceptors responsible for "twilight" vision are called
a. rods. b. cylinders. c. cones. d. cans.