Cart(m=2.0) is traveling to the right at 3.50m/s toward cart Y. Cart Y (m=9.0kg) is traveling to the left at 1.5 m/s. Cart X and Cart Y collide inestically. Calculate the total momentum of the two-cart system after the collision.​

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.

Explain why electric current cannot exist if a current doesn't have a voltage source.

Atruck driver is attempting to deliver some furniture. first, he travels 8 km east, and then he turns around and travels 3 km west. finally, he turns again and travels 13 km to his destination. what is the drivers distance