This question can likely be answered using the formula E=hc/w where w is wavelength, h is Planck's constant, c is the speed of light, and E is energy in Joules. 5 electrons are emitted when calcium is flashed with light of wavelength 340 nm and intensity of 50 percent.
Remove the hog-rings as you roll the cover up over the seat. If your seat has a hard back, there will be a series of screws along the bottom that hold the bottom of the hard back to the seat. Unscrew these, and then pull open the hard back slightly to determine if the hardback needs to be slid up or down to be removed.
With this installed, put the rubber gasket/ring around the neck under the sink and install the disposal. Hold the disposal up against the sink and rotate the locking ring until it comes to a stop. To rotate the ring completely, you can use a phillips head screw driver in the holes in the locking ring for more leverage.