PLS HELP ASAP

Assignment due in 30 min and a LOT more questions

Which quantities are scalars? choose all that apply a. distance b. speed c. acceleration d. velocity

According to newton’s first law of motion, which force is expected to cause a body to accelerate?

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.