What drives the motion of the continental plates on Earth?
A) lava flows in trenches along the sea floor
B) tidal forces
C) convection cells in the mantle
D) Earth's magnetic field
E) rotation of the liquid core
C
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Three resistors, each of different value, are used in a circuit with a power source supplying 12 volts. For which of the following resistor combinations is the total power supplied the greatest?
a. all three resistors in series b. all three resistors in parallel c. two of the resistors in parallel with the third resistor in series with the parallel pair d. This cannot be found until it is known which resistor is in series with the parallel pair.
A compass registers ______________
Fill in the blank(s) with correct word
In western movies you often see a person putting his ear against the rails in the train tracks to find out if a train is approaching
Why would this give him advance knowledge of the approach of a train?
The rotation curve method can be applied only to pairs of galaxies orbiting each other
a. True b. False Indicate whether the statement is true or false