The question is going along fine, and then suddenly "groups of two" get thrown in. What that means is not clear at all.
Here's a solution assuming that 8 heater wires are all in parallel:
-- The resistance of each wire is 4 ohms.
-- If eight resistors, each 4 ohms, are in parallel, the <em>total resistance is 0.5 ohm.</em>
-- Current = (voltage)/(resistance)
Current = (12 volts) / (0.5 ohm)
<em>Current = 24 Amperes.</em>
Power dissipated by the heater = (voltage) x (current)
Power = (12 volts) x (24 Amps) = 288 watts, a nice toasty heating pad.
I believe it's b. A flashlight
Erosion is the process when the physical world breaks apart rocks by water air and movement
We will first record its mass and then its volume by measuring its dimensions
then divide mass by volume and will get density of regular solid
Answer:
9.03 times 10times 23 calculate it and there ya go