What is the rms Voltage value and why we use it ?

Answers

Answer 1

Answer: Suppose that you have an alternating current generator. If you want to get the same result with a direct current (DC) generator, you have to set the voltage to the RMS (Root Mean Square) value of the (AC). In short, RMS is the value of the direct current voltage that is used instead of an alternating current.

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What is the advantage of a gold leaf electroscope ?

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It's to determine if there is a charge on an object/body or not and what kind of charge as well. Hope this can help!

A cat jumps 1m forward, then crawls 0.2m backwards. What is the displacement of the cat?

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I think its 0.8m because 1+(-0.2)=0.8

Displacement refers to how far out of place an object is. So if the cat jumps a meter forward, than crawls back .2 meters, the cat is .8 meters out of place

Which of the following does not represent a mechanical wave?sound
waves in the ocean
waves in a wheat field
light

Answers

Answer:

The other person who answered is incorrect- the real answer is light.

Explanation:

A mechanical wave is a wave that requires a medium. A medium is any substance that has a defined set of physical properties and can transmit energy. A medium can be a solid, liquid, or gas. Some examples of a medium include an iron bar, the ground, water, lava, air, and helium in a balloon.

The answer is not sound because sound travels through waves through the air. If you were to put a source of sound in a container that contains no air, you would not be able to hear the sound through the container. Since sound has a wave and a medium, it is a mechanical wave.

The answer is not waves in the ocean because, obviously, this is a wave. Its medium is the water. Since it has a wave and a medium, it is a mechanical wave.

The answer is not waves in a wheat field because, again, this is a wave. The medium is the air. Since it has a wave and a medium, it is a mechanical wave.

The answer is light. Light travels through electromagnetic waves. However, it does not require a medium. Light can travel not only through air and solid materials, but also through the vacuum of space. Since light does not require a medium, it is not a mechanical wave.

I hope this helps !! :)

ocean waves because its not artificial

How many neutral points does a bar magnet have

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Answer:

There are two neutral points. At a neutral point, the net magnetic field becomes zero.

Explanation:

When a covalent or an ionic bond is formed a chemical change has occurred. Which of these is not associated with a chemical change?A) The atoms of the substance produced have been rearranged.
B) The substances produced are identical to the substances that reacted except that they're isomers.
C) The total mass of the reacting substances is the same as the total mass of the substance produced by the reaction.
D) The chemical properties of the substances produced by the reaction are different from those of the reacting substances.

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Answer: B) The substances produced are identical to the substances that reacted except that they're isomers.

Explanation: Chemical change is a change in which atoms of the reactants are rearranged ,thus leading to formation of new products.

The new substances formed are different compounds from the original reactants and thus they have different properties.

$2Na(s)+Cl_2(g)\rightarrow 2NaCl(s)$

This is an example of chemical reaction in which the bond between chlorine molecule is broken and a new bond between sodium and chlorine gets formed.

$NaCl$ formed is an ionic compound whereas chlorine is a covalent compound and sodium is a metal.

The answer is B). The total mass and the atom numbers of reacts and products are the same in the reaction. But that does not mean the production are identical to the reactants.

You cant see the cells in your body because most of them are very small true or false?

Answers

Answer: The given statement is True.

Cells are the basic fundamental, structural, and functional unit of all living organisms.

Cells are the microscopic structures, which are responsible for performing all the functions of life. Thus, cells present in the body of living organisms can not be visible through naked eyes.

Therefore, the given statement is True.

True you can't see them because most of them are way too small to see.

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