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381: There is evidence that quarks come in how many flavors? Is it:
w) 1
x) 3
y) 5
z) 7
ANSWER: Y -- 5Science Bowl PHYSICS
382: To develop the correct mathematical description of the distribution of radiated energy of a blackbody with respect to wavelength for a given temperature, Planck found it necessary to assume that the molecular oscillators of the blackbody emitted and absorbed:
w) No radiant energy
x) Radiant energy in discrete units or quanta
y) Radiant energy in a continuous form
z) None of the above.
ANSWER: X -- RADIANT ENERGY IN DISCRETE UNITS OR QUANTA
383: How many torr are there in one atmosphere?
ANSWER: 760
384: A stone weighing 10 Newton’s is sitting on the side of a hill that is at a 30o angle with the horizontal. What is the magnitude of the component of the stone's weight parallel to the side of the hill?
ANSWER: 5 NEWTONS
385: A curve in the road has a radius of 500 meters, and is banked at an angle of O (read: "theta") for a traffic speed of 90 kilometers per hour, or 25 meters per second. Is O:
w) Less than 2o
x) Between 2o and 5o
y) Between 5o and 10o
z) Greater than 10o
The tangent of 2o is 0.035, the tangent of 5o is 0.09 and the tangent of 10o is 0.18.
ANSWER: Y -- BETWEEN 5o AND 10o
386: Laura weighs 50 Newton’s and pushes against a stationary brick wall that weighs 1,000 Newton’s. Her arm is two-thirds of a meter long. According to the laws of physics, how much work does she do?
ANSWER: NONE or ZERO
387: A 45 kilogram bicyclist on a 5 kilogram bicycle rides down a 50 meter high hill with her brakes partially on. Her speed at the bottom of the hill is 10 meters per second. How many kilojoules of heat were dissipated by the cyclist's brakes?
ANSWER: 22.5 KILOJOULES or 22.0 KILOJOULES (based on 9.8 m/s2)
388: A two-stage rocket attains a velocity of 3,000 meters per second when it drops the first stage and ignites the second. It consumes 1 kilogram of fuel per second and its exhaust speed is 2,000 meters per second. What is the thrust on the spacecraft?
w) 2,000 Newton’s
x) 3,000 Newton’s
y) 2,000 Newton-seconds
z) 3,000 Newton-seconds
ANSWER: W -- 2,000 NEWTONS
389: A round viewing window with a 20 centimeter diameter is installed in a tank at the Shed Aquarium. It is 5 meters below the water surface. The force on the window is approximately.
w) 1,500 Newton’s
x) 10,000 Newton’s
y) 25,000 Newton’s
z) 50,000 Newton’s
ANSWER: W -- 1,500 NEWTONS
390: The density of lead is 12 grams per cm3. A lead brick has a mass of 1.5 kilograms. Its dimensions are 10 cm by 5 cm by 4 cm. Is it:
w) More than 75% hollow
x) Between 50 and 75% hollow
y) Between 25 and 50% hollow
z) Between 0 and 25% hollow
ANSWER: Y -- BETWEEN 25 AND 50% HOLLOW Science
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