Acceleration: A water rocket can reach a speed of 75 m/s in 0.050 seconds from launch. What is its average acceleration?
Fill in the blank(s) with the appropriate word(s).
1500 m/s2
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Galileo's discovery of Saturn's moons proved that Earth, too, could move and still keep its satellite
a. True b. False Indicate whether the statement is true or false
Two particles, X and Y, are 4 m apart. X has a charge of 2Q and Y has a charge of Q. The force of X on Y:
A) has twice the magnitude of the force of Y on X B) has half the magnitude of the force of Y on X C) has four times the magnitude of the force of Y on X D) has one-fourth the magnitude of the force of Y on X E) has the same magnitude as the force of Y on X
An AC voltage source, with a peak output of 114 V, is connected to a 40.0-? resistor. What is the effective (or rms) current in the circuit?
a. 2.02 A b. 1.43 A c. 2.85 A d. 4.03 A e. 5.70 A
The south pole of a bar magnet is moved toward a short helical coil of wire (solenoid) along the axis of the coil. The coil has 100 turns and the ends of the coil are connected to form a closed circuit. If the coil is replaced with a single loop of the same type of wire, and the magnet is moved exactly as before, the magnet experiences a force that is
A. repulsive and 100 times larger. B. attractive and 100 times larger. C. the same as before. D. attractive and 100 times smaller. E. repulsive and 100 times smaller.