As more and more bulbs are connected in series to a flashlight battery, what happens to the brightness of each bulb? assuming that heating inside the battery is negligible, what happens to the brightness of each bulb when more and more bulbs are connected in parallel? (#100)
a. power dissipated will be inversely proportional to net resistance of series combination of bulbs. net resistance of series combination of bulbs will be equal to the sum of resistance of individual bulbs. thus, net resistance of all the bulbs will be large.
b. brightness of each bulb depends upon power dissipated in each bulb. since, only small amount of power is dissipated in each bulb, brightness of the bulbs will decrease as more bulbs are added.
c. when bulbs are connected across the battery in parallel, voltage across each bulb will be the same.
d. the brightness of each bulb will be the same when bulbs are connected in parallel (provided resistance of each bulb is the same).

The frequency of vibrations of a vibrating violin string is given by f = 1 2l t ρ where l is the length of the string, t is its tension, and ρ is its linear density.† (a) find the rate of change of the frequency with respect to the following. (i) the length (when t and ρ are constant) (ii) the tension (when l and ρ are constant) (iii) the linear density (when l and t are constant) (b) the pitch of a note (how high or low the note sounds) is determined by the frequency f. (the higher the frequency, the higher the pitch.) use the signs of the derivatives in part (a) to determine what happens to the pitch of a note for the following. (i) when the effective length of a string is decreased by placing a finger on the string so a shorter portion of the string vibrates df dl 0 and l is ⇒ f is ⇒ (ii) when the tension is increased by turning a tuning peg df dt 0 and t is ⇒ f is ⇒ (iii) when the linear density is increased by switching to another string df dρ 0 and ρ is ⇒ f is ⇒

Convection occurs when thermal energy is transferred by the movement of

Aviolently rotating column of air is formed around a region of extremely low air pressure above land. which of these weather conditions is most likely to follow? blizzard cyclone tornado hurricane