Superconductors are materials that
A. can be easily made into wires.
B. are metallic.
C. have no electrical resistance.
D. All of these choices are correct
Answer: C
You might also like to view...
Glowing plasma is evident in the light from
A) a fluorescent lamp. B) the aurora borealis (northern lights). C) some TV screens. D) all the above E) none of the above
Contrast the internal structures and properties of neutron stars with white dwarf and main sequence stars
Specifically, what processes in each balance the inward pull of gravity; what are their energy sources; and what are their sizes, densities, and temperatures?
A 4.0-kg mass, initially at rest on a horizontal frictionless surface, is struck by a 2.0-kg mass moving along the x axis with a speed of 8.0 m/s. After the collision, the 2.0-kg mass has a speed of 4.0 m/s at an angle of 37° from the positive x axis. What is the speed of the 4.0-kg mass after the collision?
a. 2.0 m/s b. 2.7 m/s c. 4.9 m/s d. 2.4 m/s e. 3.6 m/s
The difference between the pressures inside and outside a tire is called
a. absolute pressure b. gauge pressure c. atmospheric pressure d. psi e. none of the above