Which one of the following equations is correct for the maximum kinetic energy of photoelectrons ejected from a metal?
A) Kmax = hc - Wo
B) Kmax = h? - Wo
C) Kmax = hf - Wo
D) Kmax = h?/c - Wo
E) None of the other choices is correct.
C
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A wheel of moment of inertia of 5.00 kg-m2 starts from rest and accelerates under a constant torque of 3.00 N-m for 8.00 s. What is the wheel's rotational kinetic energy at the end of 8.00 s?
A) 57.6 J B) 122.0 J C) 91.9 J D) 64.0 J E) 78.8 J
Constant Acceleration Kinematics: A car is traveling with a constant speed when the driver suddenly applies the brakes, causing the car to slow down with a constant acceleration of magnitude 3.50 m/s2. If the car comes to a stop in a distance of 30.0 m, what was the car's original speed?
A. 10.2 m/s B. 14.5 m/s C. 105 m/s D. 210 m/s E. 315 m/s
The tarp covering on a trailer or truck puffs upward for fast-moving vehicles, which illustrates
A) Pascal's principle. B) Archimedes' principle. C) the principle of continuity. D) Bernoulli's principle.
What is the absolute pressure at a distance 5.00 m below the surface of a lake? Assume the density of the water in the lake is 1000 kg/m3
A) 5.00 × 103 N/m2 B) 1.50 × 105 N/m2 C) 0.49 × 105 N/m2 D) 1.05 × 105 N/m2 E) 4.66 × 105 N/m2