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lys-0071 [83]
3 years ago
11

A toy rotates at a constant 5rev/min. is its angular acceleration positive, negative, or zero?

Physics
1 answer:
-BARSIC- [3]3 years ago
6 0

Answer:

Its angular acceleration is zero.

Explanation:

If the angular velocity of an object (in this case the toy) is constant, then its angular acceleration will be zero. Why? Because angular acceleration is the time rate change of angular velocity. Since there is no change, this brings the answer to zero.

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An object is 39 cm away from a concave mirrors surface along the principles axis. If the mirrors focal length is 9.50 cm, how fa
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Answer:

12.6 cm

Explanation:

We can use the mirror equation to find the distance of the image from the mirror:

\frac{1}{f}=\frac{1}{p}+\frac{1}{q}

where here we have

f = 9.50 cm is the focal length

p = 39 cm is the distance of the object from the mirror

Solving the equation for q, we find:

\frac{1}{q}=\frac{1}{f}-\frac{1}{p}=\frac{1}{9.50 cm}-\frac{1}{39 cm}=0.080 cm^{-1}\\q = \frac{1}{0.080 cm}=12.6 cm

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2 years ago
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Answer:

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Explanation:

The conductor's resistance is calculated by the formula in the figure.

So, you have to replace the given values into the formula.

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R= 4 ohm.m . (2m/o.7m^{2} )\\R=11.42ohm

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Use the distance swan and the time elapsed in that interval.

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