The arctic tern flies from the Arctic to the Antarctic and back every year, a total distance of 22,000 miles! In late summer, the terns start their migration south, and it takes about 3 months to go the 11,000 miles. What is the average velocity, in miles per day, that these birds travel? (Remember, velocity also includes direction!)

The artic tern flies 11000 miles about 3 months at an average velocity of 122.222 miles per day.

Explanation:

Let suppose that each month is equivalent to 30 days, from Mechanical Physics we understand that average velocity (), measured in meters per second, is defined as:

(Eq. 1)

Where:

- Travelled distance, measured in miles.

- Time, measured in days.

If we know that and , then the average velocity is:

The artic tern flies 11000 miles about 3 months at an average velocity of 122.222 miles per day.

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia