3 years ago

What is the difference between direct current and alternating current?

Physics

2 answers:

Elan Coil [88]3 years ago

6 0

Direct currents flow in one direction, while in alternating currents the flow could change/alternate.

IRINA_888 [86]3 years ago

5 0

In a direct current, the electric charge, or current, only flows in one direction. In an alternating current, the electric charge changes periodically.

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3 years ago

A machine has a mechanical advantage of 4.5. What force is put out by the machine if the force applied to the machine is 800 N?

Ghella [55]

If the machine's mechanical advantage is 4.5, that means that

Output force = (4.5) x (Input force) .

We know the input force, and we need to find the output force. Rather than wander around the room looking at the floor while our hair smolders, let's try putting the numbers we know into the equation I wrote up there. OK ?

Output force = (4.5) x (Input force)

Output force = (4.5) x (800 N)

Now dooda multiplication:

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That's exactly what the question asked for. So we're done !

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3 years ago

A hoop and a disk with uniform mass distribution have the same radius but the total masses are not known. Can they both roll dow

ser-zykov [4K]

Answer:

Explanation:

radius of hoop and the radius of disk is same = R

Let the mass of hoop is M and the mass of disk is M'.

As they reach the bottom of teh surface in same time so they travel equal distance thus, they have same acceleration.

The acceleration is given by

$a=\frac{gSin\theta }{1+\frac{I}{MR^{2}}}$

As the acceleration is same so that the moment of inertia is also same.

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Option (c) is correct.

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3 years ago

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Answer:

increase

Explanation:

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3 years ago