You have constructed a raft that is 2.00 m long, 2.00 m wide, and 0.100 m thick. Part A If the mass of the raft is 20.0 kg and your mass is 55.0 kg, how many 65.0 kg friends can cross a river with you during one trip

The roller coaster from problem #1 then tops a second hill at 15.0 m/s, how high is the second hill? 91.5 m 79.2 m 80.0 m 68.5 m

Total solidification times of three casting geometries are to be compared: a sphere, a cylinder, in which the length-to-diameter ration - 1.0, and a cube. volume = 1000 cm^3 for all three shhapes, and the same casting alloy is used. a) determine the solidification times of each geometry b) based on the results of part (a), which geometric element would make the best riser? c) if the mold constant = 3.5 min/cm^2 in chvorinov's rule, compute the total solidification time for each casting.

Which branches of natural science include the study of an organism that lived 10 million years ago