How many quark flavors are there?
a. 1 c. 6
b. 3 d. none of the above
C
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If two balls are thrown from the same cliff with the same speed, one up, one down, when they touch the ground, they should:
a. have different speed b. the same speed c. touch the ground in the same time d. travel the same distance in the air e. none of above
Conduction: A rod, with sides insulated to prevent heat loss, has one end immersed in boiling water at 100°C and the other end in a water-ice mixture at 0°C. The rod has uniform cross-sectional area 7.05 cm2 and length 87 cm. The heat conducted by the rod melts the ice at a rate of 1.0 g every 11 seconds. What is the thermal conductivity of the rod? Recall that the heat of fusion of water is 3.34 × 105 J/kg.
Fill in the blank(s) with the appropriate word(s).
What is light?
A. Light is radiant energy in the form of a wave of electromagnetic energy. B. Light is radiant energy that can be mathematically treated as a wave or particle of energy. C. Light is radiant energy in the form of a stream of energy particles, called photons. D. None of these choices are correct.
An object's weight is properly expressed in units of
A) meters. B) kilograms. C) newtons. D) cubic centimeters.