Consider a conducting bar that is free to slide along conducting rails in an upward magnetic field as shown in the diagram below. We push the bar so that it moves to the right at a constant speed. Which way will current flow through the bar, the rails, and the light bulb?
A. Clockwise
B. Counter-clockwise
C. No current flows at all.
A. Clockwise
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For a particular process where a fluid is being heated in a 2 inch (5.08 cm) diameter tube, the Nusselt number is predicted to be 45. If the fluid has a thermal conductivity of 1.5 Btu/hr·ft·ºF (2.6 W/mK) what is the predicted convective heat transfer coefficient?
What will be an ideal response?
If an extrasolar planet suddenly became more massive, but kept the same radius and orbit, what would change during an observed transit?
A) The amount of starlight would have a larger dip during the transit. B) The amount of starlight would have a smaller dip during the transit. C) The time between transits would decrease. D) The time between transits would increase. E) Nothing. The mass of a planet does not affect the appearance of a transit.
How much work is required to move a charge from one location on an equipotential to another point on the same equipotential? Explain
What will be an ideal response?
A 1200 kg car travels at 25.0 m/s and collides head-on in a perfectly inelastic collision with a stationary 2400 kg truck. The kinetic energy lost in the collision is
A. 330,000 J. B. 250,000 J. C. 125,000 J. D. 95,000 J. E. 75,000 J.