3 years ago

I need help with this

Physics

1 answer:

lord [1]3 years ago

7 0

Answer:

0.832

Explanation:

8.320 x 10 to the negative 1st power is 0.832

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If you are pushing on a box with a force of 20 N and there is a force of 7 N on the box due to sliding friction, what is the net

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I think you would do 20+7 = 27N as the net force

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During an investigation, a student determines that a copper sample has a density of 8.10 g/ml. What is the students percent erro

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<span>During an investigation, a student determines that a copper sample has a density of 8.10 g/ml. What is the students percent error of the accepted density for copper is 8.96 g/ml </span>

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4 years ago

You stretch a spring by a distance of 0.3 m. The spring has a spring constant of 440 N/m. When you release the spring, it snaps

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3 years ago

Star A and star B appear equally bright in the sky. Star A is twice as far away from Earth as star B. How do the luminosities of

DerKrebs [107]

Answer:

The answer to the question is

The luminosity of stars A is four times that of star B

Explanation:

Flux (F) produced by a source of light is directly proportional to the brightness or Luminosity (L), and varies inversely to its distance d, that is $F \alpha \frac{L}{d^2}$

Therefore if the two stars present the same flux then we have

$\frac{L_1}{d_1^2} = \frac{L_2}{(2d_1)^2}$ then crossing out like terms gives $\frac{L_1}{1} = \frac{L_2}{2^2}$ or 4·L₁ = L₂

The luminosity of star A is 4 times the that of star B

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3 years ago