Answer:
The induced current will flow in a direction north of the plane of the paper
Explanation:
This is in compliance with faraday's right hand rule pictured below.
Answer:
The frequency of a wave is measured in Hz (hertz)
Energy that transfers through the medium
Answer:
The air is contained at a high pressure in the tube. When it escapes from a small orifice, it suddenly expands. A large amount of its heat is absorbed in the process of expansion resulting in considerable fall in its temperature. This is why the escaping air feels cold.