181: In what type of reference frame does Newton's law NOT hold true? ANSWER: NON INERTIAL FRAMES
182: Which of the following does NOT travel in a vacuum?
w) Radio waves
x) Gamma rays
y) Magnetic waves
z) Sound waves
ANSWER: Z -- SOUND WAVES
183: What is the amplitude of a standing wave at its node?
ANSWER: 0
184: An incident ray comes in parallel to the principle axis of a concave Mirror. Is it reflected?
w) back along the incident ray
x) At 30 degrees to incident ray
y) Through the focal point
z) Through the center of curvature
ANSWER: Y -- THROUGH THE FOCAL POINT
185: For small oscillations, what happens to the period of a simple pendulum when the mass of the pendulum bob is doubled?
ANSWER: NOTHING or PERIOD IS UNAFFECTED
186: Why must soldiers break cadence when crossing a bridge?
ANSWER: SO THEY DON'T EXCITE A VIBRATIONAL RESONANCE IN THE BRIDGE.
187: Who named the two kinds of electrical charges "positive" and "negative"?
ANSWER: BENJAMIN FRANKLIN
188: What SI prefix is used to represent 10-18?
ANSWER: ATTO
189: When a slingshot exerts a 10 Newton force on a rock, the rock accelerates at 50 meters per second squared. What force is required to accelerate the rock to 150 meters per second squared?
ANSWER: 30 NEWTONS
190: How are work and power related?
ANSWER: POWER IS THE AMOUNT OF WORK PER UNIT TIME
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