As the intensity of light is increased in a photoelectric effect experiment, the energy of the emitted electrons increases
a. True
b. False
Indicate whether the statement is true or false
False
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A system performs 800 J of work while taking in 500 J of heat. What is the change in internal energy of the system?
A. not possible. B. 300 J C. -300 J D. 1300 J E. -1300 J
A body travels at an initial speed of 2.5 m/s. Given a constant acceleration of 0.2 m/s2, what is the speed of the body at time 25 seconds later?
A. 7.5 m/s. B. 3.4 m/s. C. 3.6 m/s. D. 5.5 m/s. E. 6.0 m/s.
A planet has two small satellites in circular orbits around the planet. The first satellite has a period 12.0 hours and an orbital radius 6.00 × 107 m. The second planet has a period 16.0 hours
What is the orbital radius of the second satellite? A) 4.50 × 107 B) 3.90 × 107 C) 9.24 × 107 D) 8.00 × 107 E) 7.27 × 107
Coulomb's Law: Three point charges are located on the x-axis at the following positions: Q1 = +2.00 ?C is at x = 1.00 m, Q2 = +3.00 ?C is at x = 0.00, and Q3 = -5.00 ?C is at x = -1.00 m. What is the magnitude of the electric force on Q2? (k = 1/4??0 = 8.99 × 109 N ? m2/C2)
A. 0.0540 N B. 0.135 N C. 0.158 N D. 0.0810 N E. 0.189 N