A hollow cylindrical (inner radius = 1.0 mm, outer radius = 3.0 mm) conductor carries a current of 80 A parallel to its axis. This current is uniformly distributed over a cross section of the conductor. Determine the magnitude of the magnetic field at a point that is 2.0 mm from the axis of the conductor
a. 8.0 mT
b. 3.0 mT
c. 5.3 mT
d. 16 mT
e. 1.2 mT
B
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Pascal's Principle: A container consists of two vertical cylindrical columns of different diameter connected by a narrow horizontal section, as shown in the figure. The open faces of the two columns are closed by very light plates that can move up and down without friction. The tube diameter at A is 35.0 cm and at B it is 10.2 cm. This container is filled with oil of density 0.820 g/cm3. If a 125-kg object is placed on the larger plate at A, how much mass should be placed on the smaller plate at B to balance it?
Fill in the blank(s) with the appropriate word(s).
The linear density of a rod, in g/m, is given by 
. The rod extends from the origin to x = 0.400 m. What is the location of the center of mass of the rod?
A. x = 0.213 m B. x = 0.315 m C. x = 0.384 m D. x = 0.184 m E. x = 0.208 m
Explain two methods that could be used to find the spring constant of a spring experimentally
Consider a huge rotating cloud of particles in space that gravitate together to form an increasingly dense ball. As the cloud shrinks in size, it
A) rotates slower. B) rotates faster. C) rotates at the same rate.