In a distant galaxy, whose light is just arriving from 10 billion light years away, our spectroscope should reveal that the most common element is

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.

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter

Acar travels in reverse. it covers 150 meters in 12 seconds what is the velocity of the car what is the speed of the car