2. suppose a dipole ⃗p is placed in a nonuniform electric field e⃗ = eˆi that points along the x axis. if e⃗ depends only on x and the electric field varies very slowly from the negative to the positive charge in the dipole (2l is the distance between charges in the dipole), show that the net force on the dipole is f⃗ = (⃗p · de⃗ dx )ˆi.

Aphoton is absorbed by an electron that is in the n = 3 state of a hydrogen atom, causing the hydrogen atom to become ionized. very far away from the nucleus, the released electron has a velocity of 750,000 m/s. what was the wavelength of the absorbed photon?

The chart shows the costs and shipping times for materials that a company needs to build a new product. which describes the best trade-off if the company needs to start building their product within the next two years? they should order the domestic materials because it is always best to choose the fastest shipping time. they should order the imported materials because it is always best to choose the lowest cost for materials. since the shipping time is longer, they should order the domestic materials because the additional cost is worth it to get the materials in time. even though the shipping time is longer, they should order the imported materials because they are less expensive and should arrive in plenty of time to build the product.

Are formed where bumps from two surfaces come into contact ?