The actual mechanical advantage of a machine
a. cannot be less than 1
b. decreases as the input distance increases
c. increases with greater friction
d. is less than the ideal mechanical advantage of the machine

What will a positive and a negative charge do if they are separated from each other?

Selma made a diagram to compare convection and radiation. which label belongs in the area marked x? must involve temperature differences between substances or objects only occurs when molecules are in direct contact involves the movement of fluids based on density differences can occur where there is little or no matter

Ablock having mass m slides down an inclined plane. the force of friction between the block and the inclined plane is f, the block's weight is m g, and the normal force is n. (a) draw a free – body force diagram showing the forces acting on the block. (b) write down all relevant newton’s equations for a given situation.