If m is 5.00 kg and r is 20.0 cm, calculate the magnitude and direction of the net gravitational force acting on the ball with the mass of 4m in case 2. define the positive direction as pointing to the right, so your answer should have a positive sign if the net force is directed right, and a negative sign if the net force is directed left. note that a number such as 1.23 x 10^-9 can be entered as 1.23e-9 n

How does convection affect our atmosphere? our layers of earth? our oceans?

Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)

How many electrons does each element require in its valence shell to become stable?