Except for the Local Group, galaxies seem to be isolated and randomly in space
Indicate whether the statement is true or false
FALSE
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Photoelectric Effect Using Stopping Potential: When light of wavelength 350 nm is incident on a metal surface, the stopping potential of the photoelectrons is measured to be 0.500 V. What is the work function of this metal? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A. 0.500 eV B. 3.05 eV C. 3.54 eV D. 4.12 eV
Each of the following is a prediction of the theory of relativity (special or general). Which one is crucial to understanding how the Sun provides light and heat to Earth?
A) Gravity is curvature of spacetime. B) E = mc2 C) If you observe someone moving by you, you'll see his/her time running slow. D) Space is different for different observers. Time is different for different observers. Spacetime is the same for everyone.
A 5.00-g bullet is fired into a 950-g block of wood suspended as a ballistic pendulum. The combined mass swings up to a height of 8.00 cm. What was the kinetic energy of the bullet immediately before the collision?
a. 1.4E+2 J b. 1.5E+3 kJ c. 3.9E–3 J d. 1.4E+8 J e. 1.5E+2 J
A radio transmitter broadcasts at a frequency of 200,000 Hz. What is the wavelength of the wave?