Different forces were applied to five balls, and each force was applied for the same amount of time. the data is in the table.
if the force on ball a doubles while the time remains the same, what happens to the impulse?
a. it divides in half.
b. it does not change.
c. it doubles.
d. it quadruples.

The impulse provided to the ball is equal to the change in momentum of the ball.

According to Newton's second law, The rate of change of momentum is directly proportional to the force applied. Hence, the equation can be written as:

Δp = F × t

Δp = change in momentum = Impulse

F = Force

t = time for which the force is applied

Now. if the force is doubled and the time remains same.

F(new) = 2F

t = t

Δp (new) = 2F × t

Δp (new) = 2 Δp (old)

Hence, the impulse gets doubled

Option C is correct.

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.