The variable r that appears in the equation F = Gm1m2/r2 is
a. the straight-line distance between the centers of the two masses.
b. the rate at which both objects are moving.
c. the radius of the first mass.
d. the radius of the second mass.
a
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A 1.00 kg mass is connected to a spring with a spring constant of 9.00 N/m. If the initial velocity is 4.00 cm/s and the initial displacement is 0.00 cm, then what is the maximum displacement of the simple harmonic motion?
A. 2.67 cm B. 2.33 cm C. 2.05 cm D. 1.67 cm E. 1.33 cm
Two mirrors make an angle ? with each other. A light ray is incident on the first mirror at an angle of incidence ?. The reflected ray hits the second mirror at an angle of incidence ?. In terms of ? and ?, what is ??
1. ? – ? 2. ? – ? 3. ?/2 – ? + ? 4. ? – ? – ?
Which of the following statements best describes the relation between the quantum theory and the photoelectric effect experiment?
a. Quantum theory explains the photoelectric effect. b. The photoelectric effect contradicts quantum theory. c. Quantum theory has no bearing on the photoelectric effect. d. The photoelectric effect explains quantum theory.
A metal having a work function of 2.4 eV is illuminated with monochromatic light whose photon energy is 4.0 eV
What is the maximum kinetic energy of the photoelectrons produced by this light? (h = 6.626 × 10-34 J • s, 1 eV = 1.60 × 10-19 J) A) 2.6 × 10-19 J B) 4.7 × 10-19 J C) 3.8 × 10-19 J D) 5.5 × 10-19 J E) 6.4 × 10-19 J