Jim pushes hard on a rock that weighs 500 pounds. He pushes with a force of 50 pounds, but the rock doesn't move. How much work did Jim do? ---> Please answer and explain it!! I can't understand this question! Thank you so much!

Zero work

Explanation:

Recall that work done on  an object is defined as the product of the net force applied to an object times the distance it travels in the same direction as the force.

Since in this case Jim used a given force to push a rock, but it didn't move, then he did zero work (because the distance moved is zero).

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.