A 0.47 kg baseball moves to the left (HINT: what sign would velocity have here) at 16 m/s striking a bat. The bat is in contact with the ball for .002 s, and it leaves in the opposite direction at 63 m/s.
What was average force on ball?

Light from a sodium lamp passes through a diffraction grating that has 1000 slits per millimeter. the interference pattern is viewed on a screen 1.000 m behind the grating. the first (m = 1) two bright yellow fringes that are visible are 0.7288 m and 0.7300 m from the central maximum. what are the wavelengths of these two fringes?

The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt