Atoms in crystals are typically separated by distances of 0.10 nm. What KE must an electron have, in eV, in order to have a wavelength of 0.10 nm?
What will be an ideal response?
1.2 × 104 eV
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In the early universe, the electromagnetic and strong nuclear forces were joined together to make the electrostrong force
a. True b. False Indicate whether the statement is true or false
The graph shows the force on an object as it moves a distance x. What is the work done by the force when the object moves from 0.0 m to 6.0 m?
A. 14 J
B. 12 J
C. 10 J
D. 8.0 J
E. 6.0 J
A double loop of wire (making 2 turns) is in the x-y plane centered at the origin. A uniform magnetic field is increasing at a constant rate in the positive z-direction. Viewed from the positive z-axis, in which direction is the induced magnetic field in the loop?
a. in the positive z-direction b. in the negative z-direction c. There is no induced field because of the double loop. d. There is no induced field because the rate of change of the magnetic field is constant.
When a wool blanket is used to keep warm, what is the primary insulating material?
a. wool b. air c. the trim around the edge of the blanket d. a thin layer of aluminum foil (usually not apparent) inside the blanket