A transformer only works with AC
a. True
b. False
Indicate whether the statement is true or false
True
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According to the Hubble law, the relationship between the distances to galaxies and the apparent velocity of recession is _____
A) linear B) exponential C) quadratic D) inverse
Two charges are separated by a distance d. If one the charges is doubled while the other is tripled, what happens to the force between the charges?
A. it increases by a factor of 5 B. it increases by a factor of 6 C. it increases by a factor of 12 D. it increases by a factor of 18 E. it increases by a factor of 36
Which of the following specifications would allow you to precisely meet someone for an appointment?
A. meet me at my car B. meet me at my office, room 203 in Williams Hall on campus C. meet me at my office, room 203 in Williams Hall on campus at 2:30 PM D. meet me at my office E. meet me at 2:30 PM
A 2200. kg auto moving at 12.0 m/s runs into a 3800. kg truck which is moving in the same direction at 5.00 m/s. The collision is perfectly inelastic
(a) What is the speed of the auto immediately after the collision? (b) What percentage kinetic energy did the truck gain in the collision?