A metallic key ring of 1.00 cm diameter is placed in a fire and heated up. What would you expect would happen to the inside diameter of the ring as it heats up?
1.It will shrink as the metallic portion expands.
2.It will expand as the metallic portion expands.
3.It will stay the same size as the metallic portion expands.
4.It is impossible to say what will happen to the open area in the center of the ring.
2
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Fill in the blank(s) with correct word
“What is the physical significance of the statement that the temperature of each node is just the average of its neighbors if there is no heat generation”
What will be an ideal response?
In electron diffraction, an electron moving at speed v << c acts like
a. a particle with momentum mv. b. a particle with position coordinate v/t. c. a wave with wavelength v/t. d. a wave with wavelength h/mv. e. both a particle with position coordinate v/t and a wave with wavelength v/t.
A rolling wheel of diameter of 68 cm slows down uniformly from 8.4 m/s to rest over a distance of 115 m. What is the magnitude of its angular acceleration if there was no slipping?
A) 1.8 rad/s2 B) 0.90 rad/s2 C) 5.7 rad/s2 D) 11 rad/s2