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Oksi-84 [34.3K]
3 years ago
6

Witch one is right

Physics
1 answer:
AveGali [126]3 years ago
5 0
I think b is the right one
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100 joule of heat produced each 1 secomd on 4ohm find the potential difference ​
irakobra [83]

Answer:

20 V

Explanation:

Power is 100 J/s or 100 W.

We know that P = IV = \frac{V^{2} }{R} .

Isolate the potential difference. V = \sqrt{RP} = \sqrt{100 * 4} = 20 V

8 0
3 years ago
Suppose a runner completes one lap around a 400-m track in a time of 50 s. Calculate the average speed of the runner.
suter [353]

Answer:

8m/s

Explanation:

Average Speed = distance / time = 400/50 = 8m/s

6 0
3 years ago
If two solutions have unequal concentrations of a solute, the solution with the lower concentration is called
marta [7]
Obviouskly lower concentrstion

6 0
3 years ago
What kind of electromagnetic radiation could be used to see molecules
Vera_Pavlovna [14]

Answer:

X ray

Explanation:

To see an object the light used must have the same or smaller wavelength than the object. The size of an atom is about 10^{10} m, smaller than the wavelength, therefore we'll need radiation with a shorter wavelength <em>since X-ray wavelengths are about the same size as atoms this characteristic makes it ideal to use.</em>

I hope you find this information useful nd interesting! Good luck!

4 0
3 years ago
With two identical light bulbs and two identical batteries how would you arrange in order to get the maximum total power to the
Norma-Jean [14]

Answer:

The batteries would be connected in series while the bulbs would be connected in parallel

Explanation:

Power (W) = VI

where V = voltage, I = current and R = resistance

from V = IR , I = V/R

Power (W) now becomes = V (V/R) = \frac{V^{2} }{R}

Power (W) =  \frac{V^{2} }{R}

from the above equation, power is directly dependent on voltage, hence the voltage has to be high for the power to be high and the power is also inversely dependent on the resistance (in this case the bulbs which act as the load)

  • We have to batteries, when batteries are connected in series the total voltage becomes the summation of the two voltages hence giving a higher voltage and when they are connected in parallel their voltage remains the same. Since we want to get higher voltage we will connect the two batteries in series.
  • we have two bulbs which are the resistance here, from the equation above the power is inversely dependent on the resistance so we would need its value to be minimal. When resistance is connected in series the resistance individual will be added to get the total resistance, hence the total resistance will be high but when the resistors are arranged in parallel you get the total resistance by applying the formula \frac{R1R2}{R1+R2} which will give us a lower resistance. Hence we would connect the bulbs in parallel.

Take note that the power from this connection should not exceed the bulbs power rating so as to avoid damage of the bulbs.

4 0
3 years ago
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