Who was the first to measure the structure of Milky Way using globular clusters?
A. Harlow Shapley
B. Edwin Hubble
C. Jacobus Kapteyn
D. William Herschel
Answer: A
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The amplitude of a lightly damped harmonic oscillator decreases from 60.0 cm to 40.0 cm in 10.0 s. What will be the amplitude of the harmonic oscillator after another 10.0 s passes?
A) 0.00 cm B) 30.0 cm C) 26.7 cm D) 20.0 cm E) 167 cm
Distinguish an E0 from an E7 galaxy
What will be an ideal response?
A monochromatic light beam is incident on a barium target, which has a work function of 2.6 eV. If a stopping potential of 1.2 V is required, what is the light beam photon energy?
a. 2.6 eV b. 1.4 eV c. 1.2 eV d. 3.8 eV e. 0.7
According to Einstein, increasing the brightness of a beam of light without changing its color will increase:
a. the number of photons. b. the energy of each photon. c. the speed of the photons. d. the frequency of the photons.