What is demagnetization? What are the precautions to be taken while handling magnets?

demagnetization: remove magnetic properties from.

Explanation: While working with magnets one should not-

1.Bring the magnets near any magnetic appliance which works with electricity.

2.They lose their properties when heated, hammered or dropped from some height.

3.Magnets should be separated by a piece of wood and 2 pieces of soft iron at their ends.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle