A spiral spring, loaded with a piece of metal, extends by 10.5 cm in air, when
the metal is fully submerged in water,
the spring extends by 6.8 cm. calculate
the relative density of the metal
(Assuming Hooke's law is obeyed)

answer: the direction of the wind is expressed as the direction from which the wind is blowing. for example, easterly winds blow from east to west, while westerly winds blow from west to east.

explanation:

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be

answer: b.

explanation:

the amount of current in the coil