Calculate the average orbital speed of the Earth around the Sun in km/h . The distance from the Earth to the Sun is 1.5*10^ 8 km . The time for one orbit is 365 days .

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.

Drag each tile to the correct box. tiles bra i sequence

Tall pacific coast redwood trees can reach heights of about 100 m. if air drag is negligibly small, how fast is a sequola cone moving when it reaches the ground f it dropped from the top of a 100 m tree?