A simple circuit consists of a 100.-ohm resistor

1 answer:

4 0

If you want to make the total equivalent resistance as small as possible,
then you should connect the new resistor in parallel with the original one.

When resistors are in parallel, then no matter how many of them there are
or what their individual values are, the total equivalent resistance is always
less than the smallest individual one.

For resistors in parallel . . .

   (1 / total resistance) = (1/R₁) + (1/R₂) + (1/R₃) + . . . however many there are.

When there are only two resistors in parallel, you can take that formula, stretch it,
massage it, exercise it, manipulate it, and you find that

   Total equivalent resistance = (product of the resistors) / (sum of the resistors) .

With 100 ohms and 25 ohms in parallel,

   Total equivalent resistance = (100 x 25) / (100 + 25) = 2,500/125 = <em>20 ohms</em>.

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Answer: The things we know are:

Sadie, the mother, is a black labrador.

Sam, the possible father, is a yellow labrador.

Discarding things such as a scientific indagation, the breeder could look for traits in the pups.

For example, yellow is recessive against black, so if the pups are yellow, there is probable that the father is Sam, none the less, if the pups are black there is also the possibility where Sam is the father, just in this case the color genes that the pups received are the ones of the mother.

A good starting point is looking at the color, the posture, and things like that.

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mr_godi [17]

Answer:

Explanation:

Animal 1 because it takes 3s to go 25 meters 3.5s to go 50 meters and 5s to go 75 meters while the others take longer.

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On a warm summer day (31 ∘c), it takes 4.60 s for an echo to return from a cliff across a lake. on a winter day, it takes 5.00 s

xenn [34]

The question is missing, but I guess the problem is asking for the distance between the cliff and the source of the sound.

First of all, we need to calculate the speed of sound at temperature of $T=31^{\circ}C$ :
$v=(331+0.60 T) m/s = (331+0.6 \cdot 31) m/s = 349.6 m/s$

The sound wave travels from the original point to the cliff and then back again to the original point in a total time of t=4.60 s. If we call L the distance between the source of the sound wave and the cliff, we can write (since the wave moves by uniform motion):
$v= \frac{2L}{t}$
where v is the speed of the wave, 2L is the total distance covered by the wave and t is the time. Re-arranging the formula, we can calculate L, the distance between the source of the sound and the cliff:
$L= \frac{vt}{2}= \frac{(349.6 m/s)/4.60 s)}{2}= 804.1 m$

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Answer:

Temperature decreases because the number of collision of the molecules decreases as they escape or evaporate. Molecules are in constant motion. Increase in temperature leads to increase in average kinetic energy of the molecules.

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