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3 years ago

List three ways you can use an electric current. Describe the energy Chang that takes place

2 answers:

8 0

Answer : There are many ways to use electric current, but as you have asked for only three, here are some of them along with the change in their energy transformations;

1) Using a light bulb which consumes electrical energy and the energy is transformed into light energy, making everything visible for us.

2) Using a power tool makes use of electrical energy and the energy is transformed into mechanical energy for multipurpose use of cutting woods.

3) Using electrical iron converts electrical energy into thermal energy to heat the iron and enables the user to iron crease-free clothes.

ioda3 years ago

6 0

An electric current is a kind of flow of an electric charge that is present in electric circuits that often carried by the electrons in a wire and also be carried by ions in electrolytes or by both ions and electrons such as in a plasma. The possible use of it is in a circuits, connection between wires and the connection of every device

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I will mark brainlest

Elenna [48]

Answer:

In image

Explanation:

5 0

2 years ago

How much of the rock cycle can be observed directly? How much must be inferred? Think about both how long things take to happen

abruzzese [7]

wheatherig?

not much.

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4 years ago

Say, for example, that you had prepared a buffer c, in which you mixed 8.203 g of sodium acetate, nac2h3o2, with 100.0 ml of 1.0

Alik [6]

Answer:

pH regulatory solution 4.8

pH regulatory solution when adding base 4.86

Explanation:

Hello!

To calculate the pH of a regulatory solution, the acid constant that relates the acid and the base must be identified in the table. In this case the constant that relates acetic acid and acetate anion has a value Ka = 1.75*10-5.

Assuming that the volume does not vary by aggravating sodium acetate we can calculate its concentration.

Knowing the acid constant and the acid and base concentrations, the pH of the solution is calculated.

By adding a base to the solution, the concentration of the acid species (acetic acid) is decreased by calculating the new concentration, the pH is calculated.

To calculate the concentration after adding the base it is necessary to calculate the dilution of each species, to avoid calculations it is convenient to work with mol or millimol (because they are contained in the same volume can be simplified).

The addition of an acid reduces the formation of the basic species of the solution.

The description of buffer b is missing to compare which pH varies more.

In a larger volume of regulatory solution, lower changes in pH are expected from the addition of acids or bases than in a small volume of solution.

In solutions with equal amounts of acid and base, lower changes in pH are expected than in solutions with different amounts due to the addition of acids or bases.

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5 0

3 years ago

Which example best demonstrates the relationship between temperature and pressure? bubbles forming in dough when it is heated bu

Margaret [11]

I think the correct answer from the choices listed above is the first option. The best example that demonstrates the relationship between temperature and pressure would be that <span>bubbles forming in dough when it is heated. Hope this answers the question.</span>

8 0

3 years ago

reativity of alkali metals increases down the group while reativity decreases down the group in helogens

BigorU [14]

Complete question is;

Chemical reactivity of alkali metals increases down the group while reactivity of halogens decreases down the group. Give reasons

Answer:

Explained below

Explanation:

Alkali metals exhibit reactivity due to their electropositivity. Now, for alkalis, their electro-positivity increases down their group. Since their reactivity increases with increase in electropositivity, it means their reactivity also increases down the group.

Whereas, the reactivity of halogens occurs as a result of their electronegativity. Now, electronegativity for halogens decreases down the group. Since their reactivity decreases with decrease in electronegativity, it means that their reactivity will also decrease down the group.

4 0

3 years ago