8. 8
Three charged particles, A, B, and C, are fixed in place in a line. Charge C is twice as far from
charge B as charge A is. All charges are the same magnitude.
What is the direction of the net force on charge B due to charges A and B?
O No net force

Hydrogen atoms are excited by a laser to the =4n=4 state and then allowed to emit. what is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system? 8 6 2 7 4 5 1 3 calculate the wavelength of the 4⟶14⟶1 transition. =λ=

Give one example to show that when substances are mixed, it may result in a chemical or a physical change depending on the conditions.

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?