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pashok25 [27]
2 years ago
8

Why the watt is called derived unit ?​

Physics
1 answer:
Yuri [45]2 years ago
4 0

Answer:

It is because it is a unit of Power(which is a derived quantity)

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An automobile moves at a constant speed over the crest of a hill traveling at a speed of 88.5 km/h. At the top of the hill, a pa
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Answer:

r=61.65m

Explanation:

Since the package remains in contact with the car's seat, the package's speed is equal to the car's speed. At the top on the mountain the package's centripetal force must be equal to its weight:

mg=F_c

The centripetal force is defined as:

F_c=ma_c=\frac{mv^2}{r}

Here v is the linear speed of the object and r is the radius of curvature. We need to convert the linear speed to \frac{m}{s}:

88.5\frac{km}{h}*\frac{1000m}{1km}*\frac{1h}{3600s}=24.58\frac{m}{s}

Now, we calculate r:

mg=\frac{mv^2}{r}\\r=\frac{v^2}{g}\\r=\frac{(24.58\frac{m}{s})^2}{9.8\frac{m}{s^2}}\\\\r=61.65m

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2 years ago
A capacitor is constructed of two large, identical, parallel metal plates separated by a small distance d
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A major difference between AC and DC electricity is that A) the current in AC electricity varies in magnitude and direction. B)
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Answer:

A) the current in AC electricity varies in magnitude and direction.

C) the voltage in AC electricity varies in magnitude and direction.

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In DC current and voltage the direction of current will not change with time and it always remains the same.

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periodically.

So here magnitude and direction both will change in AC current and AC voltage.

so the correct answer is

A)     the current in AC electricity varies in magnitude and direction.

C) the voltage in AC electricity varies in magnitude and direction.

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