A(n) _________is the charge in coulombs on a mole of positive ions of unit charge.
Fill in the blank(s) with the appropriate word(s).
Faraday
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If we double only the spring constant of a vibrating ideal mass-and-spring system, the mechanical energy of the system
A) increases by a factor of . B) increases by a factor of 2. C) increases by a factor of 3. D) increases by a factor of 4. E) does not change.
At an instant when a particle of mass 50 g has an acceleration of 80 m/s2 in the positive x direction, a 75-g particle has an acceleration of 40 m/s2 in the positive y direction. What is the magnitude of the acceleration of the center of mass of this two-particle system at this instant?
A. 60 m/s2 B. 56 m/s2 C. 40 m/s2 D. 50 m/s2 E. 46 m/s2
Joe's toaster broke. He bought a toaster oven to replace it, telling his wife Annie that it is cheaper to make toast in the toaster oven than in the range's oven
Toast takes 5 minutes to cook in the toaster oven while it takes only 3 minutes in the range's oven. Is Joe right or is Annie, who says they've wasted their money? Explain.
A changing current in one loop of wire can induce a current in another loop of wire even though the wires do not touch. The induced current appears almost instantaneously for loops close together. How can this energy exchange happen?
a. This is one of those things for which science has no adequate explanation yet. b. The second loop is affected by the thermal exchange from the heating of the first loop. c. It is a gravitational effect on the electrons. d. It is done via an electromagnetic wave.