Discover Questions

Water molecules are polar with what? Determine if 7.9 is a solution of 0.9 X equals 7.3 for Show work if there is any I don't understand it at all? Evaluate XZ-y x is 5 ,y is -0.2 and z is 6.2 please show work? How fast must a 142-g baseball travel in order to have a de-broglie wavelength with lambda~100 pm? At what distance from the earth's Center is the gravitational acceleration 4.9m/s^2? how far is this above the Earths Surface?