Which ray diagram is correct? The three rays in each diagram are distinguished by different types of lines. Hint: Check the behavior of each ray as it interacts with the lens.
A. A
B. B
C. C
D. D
E. E
Answer: D
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The magnetic field inside a circular loop of wire of radius 30 cm increases at a constant rate from 2.0 × 10^–3 T to 3.5 × 10^–3 T in 0.47 s. What is the induced emf in the wire?
a. 9.0 ×10–4 V b. 2.3 ×10–4 V c. 1.8 ×10–3 V d. 1.8 ×10–4 V
When a molecule collides with another that is approaching with greater momentum, its rebound speed
1) stays the same, 2) increases, 3) decreases, and when a molecule collides with another that is receding, its rebound speed 4) stays the same. 5) increases. 6) decreases.
When Joshua brakes his speeding bicycle to a stop, kinetic energy is transformed to
A) potential energy. B) energy of motion. C) energy of rest. D) heat.
A thin lens has a focal length of 10.00 cm for blue light. If the index of refraction for the lens material tends to decrease with increasing wavelength, what is the focal length of the lens for red light?
a. more than 10.00 cm b. It depends on whether the lens is converging or diverging. c. also 10.00 cm d. less that 10.00 cm