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Oduvanchick [21]
3 years ago
10

The charge that passes a cross-sectional area A=10-4 m2 varies with time according

Physics
1 answer:
Anarel [89]3 years ago
6 0

Answer:

Current = dQ/dt

or I = dQ/dt

Where I represents current.

Which is the rate of flow of charge.

Q=4 + 2t + t²

dQ/dt = 2 + 2t --- This is the relation that gives the instantaneous current.

At time t=2sec

dQ/dt = I = 2 + 2t

= 2 + 2(2)

=2 + 4

= 6A.

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Answer:

2.11 m/s

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Take north to be positive and south to be negative.

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2. A stone is thrown vertically upward with a speed of 22m/s.
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Answer:

Explanation:

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v_1=\sqrt{v_0^2-2gh_1}

There is no real solution, because the stone never reaches 25m.

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See this suggested solution.

1. Let a force F' is the vector sum of the forces P and Q, then it is shown on the attached picture and marked with red color.

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