Compare the time periodof two pendulums of length 4m and 9m​

T

1

=2π

g

1

T

2

=2π

g

9

=3×2π

g

1

=3T

1

Explanation:

explanation:

a fuel engine ( known as a gasoline engine in american english )is an internal combustion engine with spark ignition, designed to run on petrol (gasoline) and similar volatile fuels.

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.