Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m.You drop the box. As it falls to its original level, its kinetic energy is
a. 0 b. 4 J.
c. 100 J. d. none of the above.
c
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In an INELASTIC collision between two objects
A) the momentum of each object is conserved. B) the kinetic energy of each object is conserved. C) the momentum of the system is conserved but the kinetic energy of the system is not conserved. D) both the momentum and the kinetic energy of the system are conserved. E) the kinetic energy of the system is conserved, but the momentum of the system is not conserved.
If the current in a wire is tripled, what effect does this have on the electron drift velocity in the wire?
a. It stays the same. b. It triples. c. It decreases by a factor of three. d. It increases by a factor of nine.
Two ropes are spliced together as shown
A short time after the incident pulse shown in the diagram reaches the splice, the rope's appearance will be that in
a.
Physics & Space Science
What form of convection causes the offshore sea breeze in the evening?
A. natural convection of air falling over the cooling land B. forced convection air or force convection of water C. forced convection of water D. natural convection of air rising over the warming land