Which of the following best describes the lunar maria?
A) relatively smooth, flat plains on the Moon
B) densely cratered regions on the Moon
C) mountainous regions on the Moon
D) frozen oceans of liquid water on the Moon
A) relatively smooth, flat plains on the Moon
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Constant Acceleration Kinematics: A cart with an initial velocity of 5.0 m/s to the right experiences a constant acceleration of 2.0 m/s2 to the right. What is the cart's displacement during the first 6.0 s of this motion?
A. 10 m B. 55 m C. 66 m D. 80 m
Phase Angles: A 120-V rms voltage at 60 Hz is applied across an RC circuit. The rms value of the current in the circuit is 0.60 A, and it leads the voltage by 60°. What is the capacitance in this circuit?
A. 13 ?F B. 14 ?F C. 15 ?F D. 16 ?F E. 17 ?F
The value of a resistor that carries 2 A when connected to 10 V is
A) 2 ohms. B) 5 ohms. C) 10 ohms. D) 20 ohms. E) more than 20 ohms.
Magnetic Field of a Long Wire: Three long parallel wires each carry 2.0-A currents in the same direction. The wires are oriented vertically, and they pass through three of the corners of a horizontal square of side 4.0 cm. What is the magnitude of the magnetic field at the fourth (unoccupied) corner of the square due to these wires? (?0 = 4? × 10-7 T ? m/A)
A. 1.2 µT B. 2.1 µT C. 12 µT D. 21 µT E. 0 T