1/Req = 1/R1 + 1/R2 + 1/R3

1/Req = 1/10 + 1/22 + 1/100

To solve this problem, multiply both sides by the product of all of the denominators.

22,000 = 2,200 Req + 1,000 Req + 220 Req

3,420 * Req = 22,000

Req = 22,000 ÷ 3,420

This rounds to 6.43 Ω. I would not suggest that you round numbers before you have the answer. 1/22 is a repeating decimal.

]]>– first, the female eats the male right after mating (his sole use by then)

– then she stops eating

– she finds a den, lays eggs, and spends her whole remaining energy caring for the eggs, cleaning them and aerating them.

– she dies soon after her eggs hatch ]]>

You can use the Pythagorean Theorem:

a² + b² = c²

The sides (legs) are each 1 inch long. They hypotenuse (c) is unknown:

1² + 1² = c²

2 = c²

Take the square root of both sides:

c = √2 ≈ 1.414

Answer:

The diagonal would be about 1.414 inches long

matter and energy are indistinguishable on a nuclear

scale. An atomic nucleus is closer to a little ball of fire

than solid particles.

Infinite reduction doesn’t work in quantum mechanics.

On the other hand, that puts us near the absolute

minimum in the scale of the universe.

Go figure.

The only problem with that is that atoms bond strongly with other atoms. If whatever their macro representation is in our universe had a bond with another one, the result would be pretty catastrophic.

— that and atoms don’t behave exactly with the laws of physics, which is why we have quantum physics.

If something lives on those little things, they definitely don’t live in the same way we do. Additionally, they would need something that would help them conduct electricity in their brains. That creates a different level of complications for something sub-atomic.

]]>(2x^3 – 4x^2 + 24000x) / x =>

2x^2 – 4x + 24000

A(x) = 2x^2 – 4x + 24000

A'(x) = 4x – 4

A'(x) = 0

0 = 4x – 4

0 = x – 1

x = 1

So, when x = 1, the average cost per item is at its lowest amount.

]]>783 * 10^6 Liters / (15223 * 0.03 L/passenger) =>

783 * 10^6 / (15223 * 3/100) passengers =>

783 * 10^8 / (15223 * 3) =>

261 * 10^8 / 15223 =>

261 * 100 * 10^6 / 15223 =>

26100 * 10^6 / 15223 =>

1.7145109373973592590159626880378… * 10^6

1714510.937397…. people

1714511 people or 1714510

]]>In the final stages of rabies, the virus in present in large numbers in the animal’s saliva. However, at that stage an animal is unable to swallow and is afraid of water. The reason is that the virus has evolved to do that to an animal by attacking its brain. Water will dilute the concentration of virus, making it much less likely to infect by biting. So, if anything, the rain may have lowered any risk of virus transmission by diluting any saliva that may be present in your garbage can. You can examine your hands and arms to see if you have any cuts. When in doubt, go see a doctor and tell him/her your concern. If and when symptoms appear, it would be too late.

]]>A wheel of his bicycle turns 48 times as the bicycle travels this distance.

The circumference of the bicycle wheel is 4 m.

π d = 4 m

Use the value 3.14 for π.

The diameter of the wheel:

1.3 m (rounded to the nearest tenth). ]]>

The end result is a 3D structure of insulators, conductors, transistors, resistors and other components formed within the depth of the silicon wafer itself.

The machines to do all that are massively complex and expensive….

A piece of plain, pure, silicon on its own may be able to be used as a single crude point contact diode or transistor, but that’s about it.

And ps. The silicon itself must be reformed in to a single large, perfect crystal before the wafers are cut from it.

]]>