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3 years ago

True or False: An electric circuit has to be complete for the load to receive electricity.

Physics

1 answer:

antoniya [11.8K]3 years ago

4 0

It will be false you welcome:)

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Sirius A has a luminosity of 26 LSun and a surface temperature of about 9400 K.What is its radius?

wlad13 [49]

Answer

Given,

Sirius A surface temperature,T = 9400 K

Sirius A luminosity,L = 26 L₀

L₀ is the luminosity of sun.

Radius of sun = 695700000 m

Temperature on sun surface = 5780 K

Luminous intensity is given by:-

$L=4 \pi R^{2} \sigma T^{4}$

Now

$\frac{L}{L_{0}}=\frac{4 \pi R^{2} \sigma T^{4}}{4 \pi R_{0}^{2} \sigma T_{0}^{4}}=26$

$\Rightarrow \frac{R^{2} T^{4}}{R_{0}^{2} T_{0}^{4}}=26$

$\Rightarrow R^{2}=26 \times \frac{R^{2} T_{0}^{4}}{T^{4}}=26 \times \frac{695700000^{2} \times 5780^{4}}{9400^{4}}$

$R=1341246640\ m=1.34 \times 10^{9}$

7 0

3 years ago

What us the formula of finding diameter

Over [174]

Answer:

The formula to find the diameter states the relationship between the diameter and the radius. The diameter is made up of two segments that are each a radius. Therefore, the formula is: Diameter = 2 * the measurement of the radius. You can abbreviate this formula as d=2r.

Explanation:

5 0

4 years ago

How much time should be allowed for a 605-mile car trip if the car will the traveling at an average speed of 55 Miles per hour?

Luda [366]

T = d/s

T = 605/55

T = 11

Hope that helps!!

3 0

3 years ago

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As the temperature of a substance approaches absolute zero, the random motion of the molecules

ehidna [41]

Answer: Decreases

Explanation:
By definition, absolute zero temperature defines the temperature at which the atoms of a material no longer transmit thermal energy.

Engineering materials can transmit thermal energy at higher temperatures by random molecular motion.
It follows that as the temperature decreases toward absolute zero, random molecular motion decreases.

5 0

3 years ago

I NEED HELP LIKE RIGHT NOW!!!!... please

Maslowich

1.) TRUE

7.) I believe it is FALSE

that's all I got for now

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3 years ago

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