One of the most surprising things about a superconductor is that
it has NO electrical resistance. The resistance doesn't just become
very very very small. It becomes literally completely zero. (This is
a big part of the reason why it's called a "super-conductor".)
If you start an electric current flowing in a superconductor, you can
connect the ends of it together, and the current keeps going around
and around the loop and never dies out !
Answer:
A pre-existing weather disturbance: A hurricane often starts out as a tropical wave.
Warm water: Water at least 26.5 degrees Celsius over a depth of 50 meters powers the storm.
Thunderstorm activity: Thunderstorms turn ocean heat into hurricane fuel.
Answer:
Explanation:
The data we are given is:
V = ? fo = 100GHz fs = 100000015KHz C = 343m/s
With the doppler effect formula we can calculate the frequency perceived by the vehicle as:
(1)
Then, we sound waves bounce back on the vehicle:
(2) Replacing tha value obtained in (1)
Solving for V:
Answer:
The answer is: b. There is an induced current in the wire ring, directed in clockwise orientation
Explanation:
The direction of the magnetic flux can be calculated using the right-hand rule. As the current increases, the outward flow through the ring also increases, allowing the induced current to move through the ring, this is in accordance with Faraday's laws.
If we analyze Lenz's law, the current that is induced in the ring would move in one direction to reduce the outward magnetic flux. This flux can be decreased if the ring produces a magnetic field that moves into the ring.
If the right-hand ruler to the ring is used, the flow would move inward, and the fingers would curl around the ring clockwise. As a conclusion we can say that the current that is induced in the ring would move clockwise.
