An object moves with speed vx = +0.9 in the Home Frame. In an Other Frame moving at ? = 0.60 relative to the Home Frame, the object’s x-velocity v?x is
A. v?x = 1.5
B. 1 < v?x < 1.5
C. 0.9 < v?x < 1
D. 0.3 < v?x < 0.9
E. v?x < 0.3
F. v?x < 0
D. 0.3 < v?x < 0.9
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Photoelectric Effect: A photoelectric surface has a work function of 2.10 eV. Calculate the maximum kinetic energy, in eV, of electrons ejected from this surface by electromagnetic radiation of wavelength 356 nm. (1 eV = 1.60 × 10-19 J, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s)
Fill in the blank(s) with the appropriate word(s).
When an electron moves in a direction opposite to the electric field, its potential increases but the potential energy decreases
Indicate whether the statement is true or false
When you catch a ball, you feel a force against your hand. Why?
What will be an ideal response?
A moving particle is subject to conservative forces only. When its kinetic energy decreases by 10 J, what happens to its mechanical energy?
a. It increases by 10 J. b. It decreases by 10 J. c. It increases, but not necessarily by 10 J. d. It decreases, but not necessarily by 10 J. e. It remains the same.