When light shines on a lens placed on a flat piece of glass, interference occurs which causes circular fringes called Newton's rings. The two beams that are interfering come:
a. from the top and bottom surface of the lens.
b. from the top surface of the lens and the top surface of the piece of glass.
c. from the bottom surface of the lens and the top surface of the piece of glass.
d. from the top and bottom surface of the flat piece of glass.
c
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Three resistors, each of different value, are used in a circuit with a power source supplying 12 volts. For which of the following resistor combinations is the total power supplied the greatest?
a. all three resistors in series b. all three resistors in parallel c. two of the resistors in parallel with the third resistor in series with the parallel pair d. This cannot be found until it is known which resistor is in series with the parallel pair.
Projectile Motion: A rock is thrown from the upper edge of a tall cliff at some angle above the horizontal. It reaches its highest point and starts falling down. Which of the following statements about the rock's motion are true just before it hits the ground? (There could be more than one correct choice.)
A. Its horizontal velocity component is zero. B. Its velocity is vertical. C. Its vertical velocity component is the same as it was just as it was launched. D. Its horizontal velocity component is the same as it was just as it was launched. E. Its speed is the same as it was just as it was launched.
24.0 moles of a diatomic ideal gas with a molar specific heat 5R/2 is heated from 20.0°C to 100°C. What is the change in entropy of the gas?
A) -0.365 J/K B) 0.365 J/K C) 802 J/K D) -19.9 J/K E) 120 J/K
How many types of fundamental particles are there in the Universe and how many dominate on Earth?
A. About 30 with 3 dominant B. More than a million with 3 dominant C. About 300 with 30 dominant D. About 300 with 3 dominant E. About 30 with 15 dominant