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sweet-ann [11.9K]
2 years ago
14

Leslie is investigating which brand of cell phone has the longest lasting battery.

Physics
2 answers:
Sergeeva-Olga [200]2 years ago
6 0

Explanation:

hope it's helpful for you

tankabanditka [31]2 years ago
6 0

Answer:

abcdefghijkljjjjdjdjs

Explanation:

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A magnet is moved in and out of a coil of wire connected to a high-resistance voltmeter. If the number of coils doubles, the ind
Varvara68 [4.7K]

Answer:

A. Doubles.

Explanation:

In an electromagnetic device such as a generator, when a wire (conductor) moves through the magnetic field between the South and North poles of a magnet, an electromotive force (e.m.f) is usually induced across a wire

The mode of operation of a generator is that a metal core with copper tightly wound to it (conductor coil) rotates rapidly between the two (2) poles of a horseshoe magnet type. Thus when the conductor coil rotates rapidly, it cuts the magnetic field existing between the poles of the horseshoe magnet and then induces the flow of current.

When a high-resistance voltmeter is connected to an electric circuit, a deflection will arise due to the flow of electricity. Moving the magnet towards the coil of wire will cause the needle of the high-resistance voltmeter to move in one direction. Also, as the magnet is moved out from the coil of wire, the needle of the high-resistance voltmeter moves in the opposite direction.

In this scenario, a magnet is moved in and out of a coil of wire connected to a high-resistance voltmeter. If the number of coils doubles, the induced voltage doubles because the number of turns (voltage) in the primary winding is directly proportional to the number of turns (voltage) in the secondary winding.

4 0
3 years ago
All you have to do is find the description for a b c and d words and find the meaning 8 9 10 11 and 12
insens350 [35]
A-11 polar easterlies
b-8 winds blowing between the equator and 30° N and south
c-10
d-9
4 0
3 years ago
Based on The MOHS hardness Scale, which mineral could be scratched by a penny but not by a fingernail
melomori [17]

The correct answer is B. Calcite

Explanation:

Mohs hardness scale indicates the hardness of minerals using a scale from 1 to 10 as well as defining the objects or tools that can be used to scratch the minerals. These two features of minerals are shown in the table of the image. About this, it is shown gypsum and talc can be scratched by just a fingernail, considering minerals with a hardness of 2.5 or below can be scratched by a fingernail. In the case of calcite that has a hardness of 3, this cannot be scratched by a fingernail, but it can be scratched by a penny, which works for minerals with a hardness of 3.5 or below. Thus, the correct answer is Calcite.

6 0
2 years ago
In the context of the loop and junction rules for electrical circuits, a junction is: Group of answer choices where a wire is co
o-na [289]

In the context of the loop and junction rules for electrical circuits, a junction is where three or more wires are joined.

Answer: Option 2

<u>Explanation: </u>

An electrical circuits consists of many points like branch, loop, junction, series, bridge, etc. So, loops are the ones where the output of one circuit will act as feedback of the same circuit. If two or more wires passes through a single point, then that point is termed as junction.

If two or three junction connect each other they are termed as branch. Like these several other parameters are there with different rules in the circuit system. For electrical circuits, junction and loop rules state that a junction is the point where more wires joined together.

4 0
3 years ago
The same book is placed on a table .9m high. What type of energy does it have and how much?
Lina20 [59]

<em>mass (m)= 5 kg</em>

<em>height (h)= 9m </em>

<em>gravity (g)= 9.8 m/s^2</em>

It has Potential energy. (PE)

• PE = mgh

Replacing:

PE = 5 * 9.8 * 9 = 441 Joules

6 0
11 months ago
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