PLEASE HELP Do you think there are any other types of simple machines (other than pulley, lever, wedge, inclined plane, screw, and the wheel and axle)? Why or why not?

An object is dropped from a tower, 400 ft above the ground. the object's height above ground t seconds after the fall is s(t)equals400 minus 16 t squared. determine the velocity and acceleration of the object the moment it reaches the ground. the velocity of the object the moment it reaches the ground is nothing ft/s.

Which lists the pairs of plates in order from least to greatest in terms of the work done to move the electron?

Jenny wants to test the electrical conductivity of two substances dissolved in water. she is preparing the containers for the experiment. which factor is most important for her to control? a) volumes of the solutions b) appearance of the solutions c) temperatures of the solutions d) concentrations of the solutions