Multiplying a 4 significant figure number by a 3 significant figure number and then dividing the product by a six significant figure number yields a number with how many significant figures?
a. 7/6
c. 2
b. 3
d. 13
B
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A light ray strikes a hexagonal ice crystal floating in the air perpendicular to one face, as shown below. The hexagonal faces of the crystal are perpendicular to the plane of the page. All the rays shown are in the plane of the page, and nice = 1.30. Which outgoing ray is correct when the incoming ray strikes the crystal face on the left head on?
A. A B. B C. C D. D E. E
What is the magnitude of the magnetic force on a charged particle (Q = 5.0 ?C) moving with a speed of 80 km/s in the positive x direction at a point where Bx = 5.0 T, By = ?4.0 T, and Bz = 3.0 T?
a. 2.8 N b. 1.6 N c. 1.2 N d. 2.0 N e. 0.4 N
A valid unit for momentum is which of the following?
a. kgm/s2 c. kgm/s b. kg/m2 d. Nm
How many focal points does a lens have?
a. None. b. One. c. Two. d. Three. e. An infinite number of possible locations.