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321: Who first showed that full color pictures can be formed from only two single color images?
ANSWER: JAMES H. LAND
322: Carlos is pulling a 40 kilogram cart with a horizontal force of 100 Newton’s. The force of friction on the cart is 20 Newton’s. The acceleration of the cart is:
w) 2 meters per second squared
x) 2.5 meters per second squared
y) 20 meters per second squared
z) 200 meters per second squared
ANSWER: W -- 2 METERS PER SECOND SQUARED
323: A car with a mass of 1000 kilogram is moving at a speed of 10 meters per second. The kinetic energy of the car is:
w) 100 Joules
x) 5000 Joules
y) 10,000 Joules
z) 50,000 Joules
ANSWER: Z -- 50,000 JOULES
324: A 10 kilogram object falls from a cliff 100 meters high. At the midpoint of its fall its total energy is:
w) 2450 Joules
x) 4900 Joules
y) 10,000 Joules
z) 20,000 Joules
ANSWER: Y -- 10,000 JOULES
325: How much time is needed for a force of 20 Newton’s to change the velocity of a 5 kilogram mass by 4 meters per second?
ANSWER: 1 SECOND
326: During an INELASTIC collision, the colliding bodies
w) Lose kinetic energy
x) Keep the same amount of kinetic energy
y) Gains kinetic energy
z) First lose, and then gain kinetic energy
ANSWER: W -- LOSE KINETIC ENERGY
327: A satellite travels at a constant speed in a circular orbit. The acceleration of the satellite is
w) Zero
x) Toward the center of the orbit
y) Away from the center of the orbit
z) At a tangent to the orbit
ANSWER: X -- TOWARD THE CENTER OF THE ORBIT
328: An 8 kilogram mass resting on a frictionless horizontal surface is attached to a spring with a force constant of 50 Newton’s per meter. If the velocity of the mass through the equilibrium position is 5 meters per second, what is the mass's maximum displacement from equilibrium?
ANSWER: 2 METERS
329: The TOTAL energy of a vertically vibrating block attached to a spring is the same:
w) Only at those points above the equilibrium position
x) Only at the equilibrium position
y) Only at those points below the equilibrium position
z) At all points in its motion
ANSWER: Z -- AT ALL POINTS IN ITS MOTION
330: Compressionnal waves are
w) Transverse waves
x) Water waves
y) Longitudinal waves
z) Light waves
ANSWER: Y -- LONGITUDINAL WAVES
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