Iced tea is made by adding ice to 1.9 kg of hot tea, initially at 90.0°C. How many kg of ice, initially at 0°C, are required to bring the mixture to 15.0°C? (Lf = 3.33 × 10^5 J/kg, cw = 4 186 J/kg/°C)
a. 1.6 kg
b. 2.1 kg
c. 1.5 kg
d. 3.1 kg
e. 1.7 kg
c
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A hollow cylindrical (inner radius = 2.0 mm, outer radius = 4.0 mm) conductor carries a current of 24 A parallel to its axis. This current is uniformly distributed over a cross section of the conductor. Determine the magnitude of the magnetic field at a point that is 5.0 mm from the axis of the conductor.
A. 0.96 mT B. 1.7 mT C. 0.55 mT D. 1.2 mT E. 0.40 mT
Two blocks of different mass are connected by a string. The system is accelerated across a smooth horizontal surface by a force supplied by a rubber band connected to the less massive block. The tension in the connecting string will be
A. the same as the force pulling the leading block. B. greater than the force pulling the leading block. C. less than the force pulling the leading block. D. zero.
If the diameter of a radar dish is doubled, what happens to its resolving power assuming that all other factors remain unchanged?
A) The resolving power quadruples. B) The resolving power doubles. C) The resolving power is cut in half. D) The resolving power is reduced to one-quarter its original value.
Suppose you are standing due east of a car traveling southwest. What is the direction of the car’s angular momentum around you? Choose from the possible directions below (as seen by a person hovering over you), where A is north, C is east, and so on. If you are using the letters on the book’s back cover, you can indicate a double letter by pointing to the letter with two fingers. 
A. A B. B C. C D. D E. Upward F. Downward T. (The vector is zero)