PLEASE ANSWER QUICK!! When an NBA player dribbles a basketball, which of the following explains why the ball
bounces back to his hand?
A. The player's hand exerts a force on the ball, which exerts an equal and
opposite force on the hand.
B. The ball exerts a force on the ground, which exerts an equal and opposite
force on the ball.
C. The ground exerts a stronger force on the ball than the ball exerts on the
ground.
D. The ball exerts a stronger force on the ground than the ground exerts on the
ball

Two red blood cells each have a mass of 9.0 multiply.gif 10-14 kg and carry a negative charge spread uniformly over their surfaces. the repulsion arising from the excess charge prevents the cells from clumping together. one cell carries −2.50 pc of charge and the other −3.10 pc, and each cell can be modeled as a sphere 7.5 μm in diameter. (a) what speed would they need when very far away from each other to get close enough to just touch? assume that there is no viscous drag from any of the surrounding liquid. answer is: 321 m/s how do i find this (b) what is the maximum acceleration of the cells in part (a)? answer is: 1.38e+10 m/s2 how did they find this answer

Jackson is designing a new heater, and he wants to experiment with different thermally conductive materials. which of these materials would be useful in conducting heat?

An ionic compound can conduct electricity when a it is dissolved in water b its crystals are ground into powder c it is in solid form d it is heated to just below its melting point