Mendeleev noticed that if he organized the elements by atomic weight certain patterns emerged. for instance, elements in the same group (family) appeared to have the same

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?

You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.