Newton's theory of light treated light as ________ while Young demonstrated that light behaved as ________ with ________ behavior
a. particles, waves, refractive
b. particles, waves, interference
c. waves, particles, interference
d. waves, particles, refractive
b
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A straight 10-cm wire bent at its midpoint so as to form an angle of 90° carries a current of 10 A. It lies in the xy plane in a region where the magnetic field is in the positive z direction and has a constant magnitude of 3.0 mT. What is the magnitude of the magnetic force on this wire?
a. 3.2 mN b. 2.1 mN c. 5.3 mN d. 4.2 mN e. 6.0 mN
The sum of two vectors is the largest when the two vectors are _____.
A. pointing in the same direction B. pointing in opposite directions C. perpendicular to each other D. positioned at a 45
A negatively charged particle is moving in the +x-direction when it enters a region with a uniform electric field pointing in the +x-direction. Which graph gives its position as a function of time correctly? (Its initial position is x = 0 at t = 0.)
A.
B.
C.
D.
E.
The following formulas are supposed to describe the speed 
of a sphere sinking in a thick fluid. C is a unitless constant, 
is the fluid’s density in kg/m3, A is the sphere’s cross-sectional area, m is its mass, and is the gravitational field strength in N/kg. Which could be right?
A. 
= CA g
B. = Cmg/ A
C. = (Cmg/ A)2
D. = (Cmg/ A)1/2
E. None of these can be correct.