If an electron has a wavelength of 0.123 nm, what is its kinetic energy, in electron-volts? This energy is not in the relativistic region
(melectron = 9.11 × 10-31 kg, 1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s)
A) 19.8 eV
B) 60.2 eV
C) 80.4 eV
D) 99.5 eV
E) 124 eV
D
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A) directly at the sighted fish. B) above the sighted fish. C) below the sighted fish.
The net force always points in the same direction as:
a. the displacement. b. the frictional force. c. the velocity. d. the force of gravity. e. the acceleration.
Almost all molecules in space are based on what element? Why?
What will be an ideal response?
A given net force propels an object along a straight-line path. If the net force were doubled, its acceleration would
A) quadruple. B) double. C) stay the same. D) be half. E) none of the above