When the reflection of an object is seen in a plane mirror, the image is:
a. real and upright.
c. real and inverted. b. virtual and upright.
d. virtual and inverted.
B
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Conversion of Units: Your car gets 34.7 mi/gal on a vacation trip in the U.S. If you were figuring your mileage in Europe, how many km/L did it get? (3.79 L = 1.00 gal; 1.00 mi = 1.61 km)
A. 14.7 km/L B. 9.16 km/L C. 55.9 km/L D. 32.4 km/L
Energy Levels: What is the energy (in electron-volts) of the n = 3 state of atomic hydrogen?
Fill in the blank(s) with the appropriate word(s).
Cosmic rays react with what atmospheric atoms to produce carbon-14?
A) oxygen B) hydrogen C) nitrogen D) carbon-12 E) helium
Particles that do not interact via the strong force but do interact via the weak nuclear force (and presumably by the much weaker gravitation force) are called
A) mesons. B) nucleons. C) hadrons. D) baryons. E) leptons.