If the voltage across a resistor is doubled, the current will
a. remain the same.
b. be cut to one-fourth.
c. be cut in half.
d. be doubled.
e. be quadrupled.
d
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Supermassive black holes erupt in ____
a. any type of galaxy, and at random times b. elliptical galaxies only, when the last of their gas and dust is consumed c. galaxies that have been part of a collision or merger d. spiral galaxies only, during a burst of star formation e. irregular galaxies
What formed the lunar maria?
a. ancient lava flows b. Earth-moon collision c. volcanic eruptions d. erosion e. tectonic plate movement
Two masses are connected by a string which passes over a pulley with negligible mass and friction. One mass hangs vertically and one mass slides on a 30.0 degrees incline. The inclined surface has a coefficient of kinetic friction of 0.200. The vertically hanging mass is 4.00 kg and the mass on the incline is 6.00 kg. The acceleration of the 4.00 kg mass is (the initial velocity of the 6.00 kg mass is up the incline)
A. 7.16 
B. 5.84
C. 2.98
D. 1.53
E. 3.90
Most asteroids are differentiated, as reflected by their spherical shapes
Indicate whether the statement is true or false