Kepler used the observations and data of which scientist to formulate his laws of planetary motion? A. Sir Isaac Newton B. Tycho Brahe C. Galileo Galilei D. Nicholas Copernicus

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

Astudent pushes on a 20.0 kg box with a force of 50 n at an angle of 30° below the horizontal. the box accelerates at a rate of 0.5 m/s2 across a horizontal floor. what is the value of the normal force on the box? 200 n 243 n 156 n 225 n

Astudent creates a model of a closed ecosystem by filling a glass tank half full with water, then adding 10 snails and two small aquatic plants. the next day, all the snails are dead. what is the most likely cause of their death?