19 ohm resistor, and across the parallel resistors
14 Calculate the length of a constantin wire of
diameter 0.6 mm and resistivity 1.1 x 10-6
Sem required to construct a standard resistor of
resistance 35 92.
(SCIGCE)
15 A battery of three cells in series, each of e. m.f.
2 V and internal resistance 0.5 N is connected
to a 2 12 resistor in series with a parallel
combination of two 3 12 resistors. Draw the
circuit diagram and calculate:
the effective external resistance
b. the current in the circuit
the lost volts in the battery
d. the current in one of the 3 12 resistors.
(SC/GCE)
of a cell is greater than
a.
C.

If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 380j of energy to the room?

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

In the future, people will only enjoy one sport: electrodisc. in this sport, you gain points when you cause metallic discs hovering on a field to exchange charge. you are an electrodisc player playing the popular four disc variant. the disks have charges of qa = −8.0 µc, qb = −2.0 µc, qc = +5.0 µc, and qd = +12.0 µc. (1) you bring two disks together and then separate them. you measure the resulting charge of these two disks and find that it is +5.0 µc per disk. which two disks did you bring together? (a) a and b (b) a and c (c)a and d (d)b and c(e) b and d (f) c and d. (2) you bring three disks together and then separate them. you measure the resulting charge of these three disks and find that it is +3.0 µc per disk. which three disks did you bring together? a, b, and c (a) a, b, and d (c) a, c, and d (d) b, c, and d. (3) given the resulting charge of each disk measured in (b) is +3.0 µc, how many electrons would you need to add to a disk of this charge to electrically neutralize it? electrons