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tangare [24]
2 years ago
6

Use the drop-down menus to complete the passage. A galvanometer detects by showing needle movement in . If the wires in this gal

vanometer are attached to the terminals of a battery, the compass needle will move and point to the wrapped coil of wire. If the wires to the terminal connections are switched, the needle will move and point in the direction. The movement of the needle can be altered and read incorrectly if there is a strong nearby.
Physics
2 answers:
Ierofanga [76]2 years ago
6 0

Answer:

1. an electric current

2. a magnetic field

3. perpendicular

4. opposite

5. magnet

Explanation:

just took the test

Gnoma [55]2 years ago
3 0

Answer:

1. an electric current

2. a magnetic field

3. perpendicular

4. opposite

5. magnet

Explanation:

edg 2020

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Which of the following is not an indication of a chemical reaction? a substance dissolves formation of a precipitate color chang
SVETLANKA909090 [29]

a substance dissolves.  


like adding a soluble salt to water, it just dissolves, i.e dissociates homogeneously as water is able to dissociate salts (ionic compounds) into its ions. (it can also dissociate other non-ionic compounds like HCL)  


the salt still remains chemically as a salt and is unchanged chemically thus it is not an indication of a chemical reaction as no chemical reaction has taken place.  


the formation of a precipitate is a chemical reaction because a new substance (i.e new chemical) is formed. For example adding aqueous sodium hydroxide into an aqueous solution with CU2+ cations will form a blue precipitate (that is copper (II) hydroxide which is insoluble, hence it precipitates). Since a new chemical is formed, a chemical reaction has taken place and thus indicates a chemical reaction.  


color change... im not sure but usually a color change will only occur when a new substance is formed. Like iron corrodes (i.e rust) slowly in moist air to form hydrated iron (III) oxide that is rust. (brown color).  


usually adding a mixture to a mixture has little energy change, i.e little heat taken in by the reaction mixture or little heat given out by the reaction mixture. Whereas when a new substance is formed, there is usually noticeable energy change like the container gets colder or hotter (without heat being supplied of course). For example dissolving basic oxides into water releases energy ( more energy released than gained = exothermic reaction).  


i think that should be the answer... hope it helped :D

4 0
2 years ago
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answer:

yes

explanation:

At a separation of the surface of Earth (r=6400km) gravity wants pull the test mass closer and closer. ... So the work done by gravity is NEGATIVE. The gravitational potential energy is negative because us trying to do the opposite of what gravity wants needs positive energy.

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<span>Answer:  "a cold front" .
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