3. A 0.02 Kg marble moving to the right at 10 cm/s makes an head on collision with a 0.02 kg marble which is moving to the left at 20 cm/s. After the collision the 1st marble moves to the left at 20 cm/s. Find the velocity of the 2nd marble after the
collision ?
M1V1i+ M2V2i = M1V1f + M2V2f
G 10 cm/s Right
10 cm/s Left
20 cm/s left
15 cm/s right

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 is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

Estimate the change in the gibbs energy and molar gibbs energy of 1.0dm3 of octane when the pressure acting on it is increased from 1.0 atm to 100 atm. the mass density of octane is 0.703 g cm−3