Two masses are being pulled up a frictionless 30.0 degrees incline by a force F parallel to the incline. The acceleration up the incline is 1.00 
The force is applied to a 200 kg mass and a string connects the 200 kg mass to a 150 kg mass. The force F is
A. 875 N.
B. 980 N.
C. 1,140 N.
D. 1,720 N.
E. 2,070 N.
E. 2,070 N.
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Two ceramic cylinders have the following properties. Cylinder A has radius R and height 2H, while Cylinder B has radius 3R and height H/4. Their resistances are measured, and it is found that 
What is the ratio of the resistivities 
of the ceramics from which they are made?
A. 1/36 B. 9/8 C. 16/9 D. 1/18 E. 36 F. 9/4
Two inclined planes A and B have the same height but different angles of inclination with the horizontal. An object is released at rest from the top of each of the inclined planes
How does the speed of the object at the bottom of inclined plane A compare with that of the speed at the bottom of inclined plane B? A) It is directly proportional to the angle. B) It is inversely proportional to the angle. C) It is same for both planes. D) There is not enough information to answer the question.
The temperature coefficient of resistivity for a "perfect" ohmic material would be:
a. positive and constant. b. zero. c. negative. d. positive and uniformly increasing.
A metal airplane flies horizontally at 200. m/s where the Earth's magnetic field
is vertical and is 45.0 ?T. If the wingspan is 25.0 meters: (a) what emf is induced across the wings? (b) what wingspan would produce 1.0 volt emf? (c) The plane reverses direction. Does the polarity of the wingtip emf change, i.e., if the left wing was positive, does it now become negative?