In the diagram, if a lightbulb is placed at d and b is closed (as shown), what will happen?

Provided that the batteries still have enough power for current to move in the circuit, replacing the resistor with the bulb and closing the switch will result in the bulb being turned on.

As time passes, the batteries will grow weaker and the light of the bulb will become dimmer and dimmer until it fades.

So, assuming that you are starting with brand new batteries (batteries with enough power) and a closed circuit (switch is closed), the correct choice would be:
The light bulb will be on

If there is any juice left in battery-A, then lightbulb-D will glow.

If the resistance-R of the filament-F in lightbulb-D is too small, then lightbulb-D will glow very brightly for a very short time, and will then burn out ... perhaps with an audible pop-P.

Answer: buoyancy forceexplanation: in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.

An  atom  (ours, not carroll's) consists of a positively charged  nucleus, surrounded by one or more negatively charged particles called  electrons. the positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. most of an atom's mass is in its nucleus; the mass of an electron is only 1/1836 the mass of the lightest nucleus, that of hydrogen. although the nucleus is heavy, it is quite small compared with the overall size of an atom. the radius of a typical atom is around 0.1 to 0.25 nanometres (nm), whereas the radius of a nucleus is about 10-6  nm.  *  if an atom were enlarged to the size of the earth, its nucleus would be only 200 feet in diameter and could easily rest inside a small football stadium.read more on -