Instead of continually tapping the ball with the rod you can drag the rod across the wand to accumulate more charge. Try it. Question 7 Explain how dragging the rod makes a difference in leaving more charge. Why didn't all the charge on the rod transfer to the ball when you tapped it

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.

absorption lines are where light has been absorbed by the atom thus you see a dip in the spectrum whereas.

emission spectra have spikes in the spectra due to atoms releasing photons at those wavelengths.

explanation:

1 - wave length

2 - amplitude

3 - crest

4 - trough

explanation:

duh.