21. If the calculated quantity has units of N/A x m, the quantity could be:

a. An electric field

b. An electrical potential

c. 0.

d. A magnetic field

e. An electric torque

22. What is the wavelength of a 92.9 MHz radio wave? a. 32mm b. 32cm c. 3.2 meters d. 32 meters

23. The special theory of relativity predicts that there is an upper limit to the speed of an object. Therefore, it follows that there is also an upper limit on which of the following properties of the object?

a. The kinetic energy of the object.

b. The total energy of the object.

c. The linear momentum of the object.

d. None of the above

24. What is the wavelength of light waves if their frequency is 5.0X1014 Hz? a. 0.60m b. 6.0 mm c. 0.060 mm d. 0.60 micro-m

25. The "Fat Man" nuclear bomb used in the Japanese city of Nagasaki had a core of ______________________

a. plutonium

b. uranium

c. tritium

d. hydrogen

26. What is the wavelength used by a radio station transmitting at a frequency of 920 kHz? (C = 3.00 10 8 m/s)

a. 22.6 m

b. 226 m

c. 326 m

d. 175 m

e. 276 m

27. The E and B fields of the electromagnetic waves are oriented a. parallel to the direction of travel of the wave, as well as to each other. b. parallel to the direction of propagation of the waves and perpendicular to each other. c. perpendicular to the direction of propagation of the wave and parallel to each other. d. perpendicular to the direction of travel of the wave, and also to each other.

28. The "Little Boy" nuclear bomb used in the Japanese city of Hiroshima had a core of ______________________

a. Plutonium

b. Uranium

c. Tritium

d. Hydrogen

29.