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Elodia [21]
3 years ago
10

On a planet whose radius is 1.1 x 10^7 m, the acceleration due to gravity is 41 m/s^2. What is the mass of the planet (in kg)?

Physics
1 answer:
MA_775_DIABLO [31]3 years ago
3 0

Answer:

M = 7.43×10^25 kg

Explanation:

let the mass of the planet be M and r be the radius of the planet and g be the gravitational acceleretion.

then:

the gravitational acceleration is given by:

g = G×M/(r^2)

M = g×r^2/G

   = [(41)×(1.1×10^7)^2]/(6.67408×10^-11)

   = 7.43×10^25 kg

therefore, the mass of the planet is 7.43×10^25 kg.

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A star is located 5.9 light years from Earth.
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3 years ago
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A grating whose slits are 3.2x10^-4 cm apart produces a third-order fringe at a 25.°0 angle. What is the wavelength of light tha
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Answer:

The light used has a wavelenght of 4.51×10^-7 m.

Explanation:

let:

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then, by Bragg's law:

n×λ = d×sin(Ф)

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λ = (3.2×10^-4 cm)×sin(25.0°)/3

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Therefore, the light used has a wavelenght of 4.51×10^-7 m.

7 0
3 years ago
A load of 1 kW takes a current of 5 A from a 230 V supply. Calculate the power factor.
Pachacha [2.7K]

Answer:

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Explanation:

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<span>Therefore the man's mass is 155 * 0.453592 = 70.30676 kilograms. </span>

<span>The part about the Moon's gravity is irrelevant. While the weight of a person or object would be different on the Moon, the mass would be the same.</span>
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When a cannon fires a cannonball, the cannon will recoil backward because the:
gulaghasi [49]

C) total linear momentum of the ball and cannon is conserved.

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