Matter Waves: What is the wavelength of the matter wave associated with a 0.50-kg ball moving at 25 m/s? (h = 6.626 × 10-34 J ? s)
A. 3.5 × 10-35 m
B. 5.3 × 10-35 m
C. 3.5 × 10-33 m
D. 5.3 × 10-33 m
Answer: B
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Molecules are
A. subdivisions of atoms B. several atoms bound together C. the same as electrons D. the same as nuclei
Solenoid A has length L and N turns, solenoid B has length 2L and N turns, and solenoid C has length L/2 and 2N turns. If each solenoid carries the same current, rank the magnitudes of the magnetic fields in the centers of the solenoids from largest to smallest
1.C > A > B 2.A > B > C 3.B > C > A
A 3.50 kg block is pulled along a moving conveyor belt at a constant speed of 0.500 m/s relative to a stationary observer while the belt moves at a constant speed of 0.200 m/s in the same direction. If the coefficient of kinetic friction is 0.400, the magnitude of the mechanical energy dissipated, in J, caused by the force of friction on the block in 8.00 s is
a. 5.6. b. 22.0. c. 32.9. d. 54.8. e. 76.8.
Matter Waves: If the momentum of an electron is 1.95 × 10-27 kg ? m/s, what is its de Broglie wavelength? (h = 6.626 × 10-34 J ? s)
A. 340 nm B. 210 nm C. 170 nm D. 420 nm E. 520 nm