Need !
when a basketball player jumps to make a shot,

a.)the downward force on the floor is equal to the upward force on his feet
b.)the force with which he jumps is equal to the force with which he shoots the ball
c.)the forces on the player’s feet and on the floor are both in the upward direction
d.)the action-reaction forces are unequal because they act on different objects

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.

in physics zero. in muscle fatigue could be high

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

friction

explanation:

they us to move forward and backwards