A. c
B. 
C. 
D. 
E. 
D.
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An object is placed a distance y0 = ?2f in front of a concave mirror of focal length f that is located at y = 0 . An identical object is placed a distance y'0 = ?2f in front of a convex mirror of focal length ?f that is located at y' = 0 . The difference between the two image positions, yi ? y'i, is a. f /2
b. f. c. 4f /3. d. 2f. e. 8f /3.
A 600-kg car is going around a curve with a radius of 120 m that is banked at an angle of 25.0° with a speed of 30.0 m/s. The coefficient of static friction between the car and the road is 0.300
What is the force exerted by friction on the car? A) 1590 N B) 3430 N C) 7240 N D) 7820 N E) 795 N
Ultraviolet light is shone on a piece of metal that has a known work function, and electrons are observed being produced through the interaction of the light with the metal. The lamp that produces the light is now replaced with a lamp of the same intensity, but which produces photons having a shorter wavelength. Which of the below differences is observed?
A. Fewer electrons per unit time are produced. B. More electrons per unit time are produced. C. Nothing changes at all. D. Electrons with a higher maximum energy are observed. E. Electrons with lower maximum energy are observed.
The square plates of a 3000-pF parallel-plate capacitor measure 40 mm by 40 mm and are separated by a dielectric that is 0.29 mm thick and completely fills the region between the plates
What is the dielectric constant of the dielectric? (?0 = 8.85 × 10-12 C2/N ? m2) A) 61 B) 56 C) 50 D) 45 E) 67