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3 years ago

What Current is drawn by a vacuum cleaner from 120 V circuit having a resistance of 28

Physics

1 answer:

Ostrovityanka [42]3 years ago

5 0

Answer:

4.3A

Explanation:

V=IR

120=I×28

I=120/28

=4.3

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A ball is thrown vertically down from the edge of a cliff with a speed of 4 m/s, how high is the cliff, if it took 12 s for the

Vesna [10]

Answer:

The height of the cliff from which the ball was dropped from is 224.4m.

\overline{v}={\frac{\Delta x}{\Delta t}}

Given the data in the question;

Initial velocity of the ball;

Time taken by the ball to reach the ground;

Distance or Height of the cliff from which the ball was thrown from;

To get the height of the Cliff, we use the Second Equation of Motion:

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Hence, the equation becomes

We substitute the given values into the equation

Therefore, the height of the cliff from which the ball was dropped from is 224.4m

Explanation:

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3 years ago

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3 years ago

Determine the value of n so that the vectors A and B are perpendicular: Ā = î + 5j + nk and B = 2î - j + k

Tanya [424]

If $\vec A$ and $\vec B$ are perpendicular, then their dot product is zero. This means

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2 years ago

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ratelena [41]

Answer:

285.7s

Explanation:

Given parameters:

Speed of the person = 1.4m/s

Unknown:

Time it takes to walk one time round the track = ?