To hold a 5 lb bag of sugar in your hand, you must push upwards on it with a force of 5 lb. This is an example of Newton's third law
a. True
b. False
Indicate whether the statement is true or false
False
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The critical angle for an air-glass interface is 10.9 degrees. A ray in air is incident on the interface. The reflected ray is 100 percent polarized. The angle of refraction is closest to:
A) 10.7° B) 10.1° C) 9.51° D) 8.91° E) 8.31°
A +5.0-?C point charge is placed at the 0 cm mark of a meter stick and a -4.0-?C charge is placed at the 50 cm mark. What is the net electric field at the 30 cm mark? (k = 1/4??0 = 8.99 × 109 N ? m2/C2 )
A) 4.0 × 105 N/C B) 5.0 × 105 N/C C) 9.0 × 105 N/C D) 1.4 × 106 N/C
Which igneous rock has light color (high silica content) and large grains (coarse texture)?
a. Gabbro b. Granite c. Rhyolite d. Basalt
In the Drude model of electrical conduction, the current density is directly proportional to
a. the average time interval between successive collisions. b. the number of charge carriers per unit volume. c. the square of the electron charge. d. the electric field present in the wire. e. the product of all four quantities listed above.