Packages are thrown down an incline at a with a velocity of 1 m/s. the packages slide along the surface abc to a conveyor belt which moves with a velocity of 2 m/s. knowing that d 5 7.5 m and μk 5 0.25 between the packages and all surfaces, determine (a) the speed of the package at c, (b) the distance a package will slide on the conveyor belt before it comes to rest relative to the belt.

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.

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve

Four identical lab carts each have a mass of 200 kg. different masses are added to the carts and the velocities are measured. all carts move to the right.