Quarks, originally isolated in cosmic ray showers, are elementary particles possessing electric charge equal to 1/3 or 2/3 the magnitude of the charge of a proton
.False (Quarks have never been isolated.)
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The Julian calendar, which has 365 days and a leap day every 4 years, was no longer used in Europe after 1582 because
a. it is slightly inaccurate and after 1600 years of use caused large problems. b. leap years are rough on people born on February 29. c. people realized that the Roman calendar is better. d. it had 13 months, which is unlucky. e. none of the above; we still use it.
Wave Characteristics: What is the wavelength used by a radio station that broadcasts at a frequency of 920 kHz? (c = 3.00 × 108 m/s)
A. 22.6 m B. 226 m C. 326 m D. 175 m E. 276 m
A certain car traveling at 34.0 mph skids to a stop in 29 meters from the point where the brakes were applied. In approximately what distance would the car have stopped had it been going 105.4 mph?
A) 29 m B) 90 m C) 51 m D) 158 m E) 279 m
A vertical cylindrical cylinder, closed at the bottom end, contains 0.0100 moles of gas
It is fitted at the top with a piston, which can move freely. The mass of the piston is 14.0 kg and the initial height of the piston above the bottom of the cylinder is 25 cm. What is the temperature of the gas? A) 290 K B) 413 K C) 3620 K D) 405 K E) 500 K