Recent content by don123

I got a = 5.17 and b = 9.02 for my starting velocities.

One car has two and a half times the mass of a second car, but only half as much kinetic energy. When both cars increase their speed by 7.0 m/s, they then have the same kinetic energy. What were the original speeds of the two cars? let x = mass of second car thus mass of first car = 2.5x...

I need help with another problem (also kinematics) and I do not want to double-thread, hence I am just posting it here. A stone is dropped from the roof of a high building. A second stone is dropped 3.00 s later. How far apart are the stones when the second one has reached a speed of 14.0...

Hey Guys, here are my questions (with the work included.) Please tell me what I am doing wrong as it is not working on webassign. A stone is thrown vertically upward with a speed of 15.0 m/s from the edge of a cliff 80.0 m high. (a) How much later does it reach the bottom of the cliff? s...

For my chem class my teacher is going to give us 2 unknowns and we have to find out their identity. How would you do this? I figured that you would heat the liquids to figure out their boiling point and then look in the book (she'll let us use the books) to figure out the substaNce. I...