How did Harry Hess, Arthur Holmes and Alfred Wegener contribute to our understanding of Earth systems and the changes that have shaped and reshaped Earth’s surface?

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.

Uppose we consider the system of the three capacitors as a single "equivalent" capacitor. given the charges of the three individual capacitors calculated in the previous part, find the total charge qtot for this equivalent capacitor. express your answer in terms of v and c.

Which color of light has a longer wavelength than yellow? a. red b. blue c. green d. violet