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2 years ago

12. The diameter of a circle is 2.42m. Calculate itsarea in proper significant figure

Physics

1 answer:

Sever21 [200]2 years ago

7 0

Answer:

A = 4.6 [m²]

Explanation:

The area of a circle can be calculated by means of the following equation.

$A=\frac{\pi }{4} *D^{2}$

where:

A = area [m²]

D = diameter = 2.42 [m]

Now replacing:

$A=\frac{\pi }{4} *(2.42)^{2} \\A = 4.6 [m^{2} ]$

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3 years ago

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Answer

given,

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R = 6.4 x 10⁶ m

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a) satellite's orbital velocity

centripetal force acting on satellite = $\dfrac{mv^2}{r}$

gravitational force = $\dfrac{GMm}{r^2}$

equating both the above equation

$\dfrac{mv^2}{r} = \dfrac{GMm}{r^2}$

$v = \sqrt{\dfrac{GM}{r}}$

$v = \sqrt{\dfrac{6.67 \times 10^{-11}\times 5.972 \times 10^{24}}{2 \times 6.4 \times 10^6}}$

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3 years ago

A spherical shell of radius 9.0 cm carries a uniform surface charge density σ= 9.0 nC/m2. The electric field at r= 9.1 cm is app

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Answer:

995.12 N/C

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3 years ago

You are holding one end of an elastic cord that is fastened to a wall 3.0 m away. You begin shaking the end of the cord at 2.3 H

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Answer:

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Explanation:

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We know,

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Where $v =$ speed of the standing wave.

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3 years ago

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Answer:

I know 1, that is in the case of a burning of a candle.

Explanation:

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3 years ago

12. The diameter of a circle is 2.42m. Calculate itsarea in proper significant figure​

12. The diameter of a circle is 2.42m. Calculate itsarea in proper significant figure