Some giants and/or supergiants are less dense than air
a. True
b. False
Indicate whether the statement is true or false
True
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True or False: A photon is reflected from a mirror. Although the photon carries momentum, its change in momentum is zero when it reflects from the mirror, so it can't exert a force on the mirror
1.True 2.False
In a certain region of space, a uniform electric field is in the x direction. A particle with negative charge is carried from x = 20.0 cm to x = 60.0 cm. The particle moves to a position where the electric potential is:
1.higher than before. 2.unchanged. 3.lower than before. 4.unpredictable.
Newton's Second Law in 1 Dimension: The figure shows an acceleration-versus-force graph for three objects pulled by wires. If the mass of object 2 is 36 kg, what are the masses of objects 1 and 3?
A. 12 kg and 90 kg B. 72 kg and 18 kg C. 90 kg and 12 kg D. 12 kg and 72 kg
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) 3.8 × 10-19 J C) 4.7 × 10-19 J D) 5.5 × 10-19 J E) 6.4 × 10-19 J