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Flauer [41]
3 years ago
12

The emf, formerly known as electromotive force, is actually... a potential difference. a field. a force. an energy.

Physics
1 answer:
stiks02 [169]3 years ago
4 0

Answer:

The correct option is (a) "potential difference".

Explanation:

EMF is an Electromotive force. It is the energy per unit electric charge that is imparted by an energy source, such as an electric generator or a battery. One of the terminals of device is positive and other is negative. It is also defined as  terminal potential difference when no current flows.

It is actually a potential difference across the terminals.

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Whitch family has full valence energy level
levacccp [35]
Group 0 - they are called the NOBLE GASES
(as they're very unreactive) because...

ALL of their atoms are full.
Example : Helium contains 2 electrons so it's outer shell is full
7 0
4 years ago
What is the purpose of the rorschach test
krok68 [10]

Answer:

to examine a person's personality characteristics and emotional functioning

Explanation:

The Rorschach test is a psychological test in which subjects' perceptions of inkblots are recorded and then analyzed using psychological interpretation, complex algorithms, or both. Some psychologists use this test to examine a person's personality characteristics and emotional functioning.

4 0
3 years ago
True or False? Sound travels faster through metal than air​
nadezda [96]

Answer:

Yes.

Explanation:

Sound waves travel through metal 17 times faster than air.

6 0
3 years ago
Read 2 more answers
Why do we have thunder storms
Over [174]
Thunderstorms happen when cold air sinks and hot air rises in rapid succession. There has to be an unstable body of hot air for a thunderstorm to happen. Cool air mingles with the hot air causing condensation (that means that raindrops form) This makes a cumulous cloud.
The moisture in the cloud is either positively charged or negatively charged. Negatively charged particles sink to the bottom of the cumulous cloud while positively charges particles rise. The positive and negative charges rub together and spark causing lightning.
Thunder is formed by the lightning, a bolt of lightning is hollow, and has no air inside it. When the lightning dissipates the air rushes to fill the space breaking the sound barrier in the process, this creates the boom. 

3 0
3 years ago
Two girls,(masses m1 and m2) are on roller skates and stand at rest, close to each other and face-to-face. Girl 1 pushes squarel
Arturiano [62]

Answer:

\vec{v}_1 = -\frac{\vec{v}_2m_2}{m_1}

Explanation:

The center of mass of the system (two girls) is constant, as the velocity of the center of mass of the system is also constant.

\vec{v}_{cm} = \frac{m_1\vec{v}_1 + m_2\vec{v}_2}{m_1 + m_2}

<u>The initial velocity of the system is zero, since both girls are at rest.</u> So the velocity of the total system at any point should be zero as well.

0 = \frac{m_1\vec{v}_1 + m_2\vec{v}_2}{m_1 + m_2}\\\vec{v}_1 = -\frac{\vec{v}_2m_2}{m_1}

This is true, because there is no friction between the girls and the ground. Otherwise, the velocity of the center of mass wouldn't be constant.

5 0
3 years ago
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