Who invented physics?​

Achemistry student needs of 40ml diethylamine for an experiment. by consulting the crc handbook of chemistry and physics, the student discovers that the density of diethylamine is 0.7 . calculate the mass of diethylamine the student should weigh out. round your answer to significant digits.

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

Discuss how the hardness or softness of the landing surface is related to the time required to stop the egg