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Eddi Din [679]
2 years ago
13

5. The net external force on a rock of mass 4.2 kg is 8.0 N forward. Find the acceleration of the rock.

Physics
1 answer:
andreev551 [17]2 years ago
6 0

Answer:

1.904

Explanation:

F= ma

8 = 4.2 a

a = 8/4.2

a = 1.904

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3 years ago
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slamgirl [31]

Answer:

2.86×10⁻¹⁸ seconds

Explanation:

Applying,

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I = 0.414/1.50

I = 0.276 A

Also,

Q = It............... Equation 3

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make t the subject of the equation

t = Q/I.................. Equation 4

From the question,

4.931020 electrons has a charge of (4.931020×1.6020×10⁻¹⁹) coulombs

Q = 7.899×10⁻¹⁹ C

Substitute these value into equation 4

t =  7.899×10⁻¹⁹/0.276

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5 0
2 years ago
Two astronauts are 2.00 m apart in their spaceship. One speaks to the other. The conversation is transmitted to earth via electr
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Answer:

D=1693742.7m

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D=\frac{dc}{v}

And for our values:

D=\frac{(2m)(299792458m/s)}{354m/s}=1693742.7m

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Anuta_ua [19.1K]

Answer:

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