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3 years ago

Please help!

Physics

2 answers:

dmitriy555 [2]3 years ago

8 0

. a positive charge always moves from a higher potential to a lower potential is right answer.

ira [324]3 years ago

6 0

Answer: The correct answer is "a positive charge always moves from a higher potential to a lower potential".

Explanation:

Electric potential: It is defined as the work done in moving a unit positive charge from from reference point to a particular point.

The electric potential difference is defined as the electric potential between two points. In the circuit, battery provides the potential difference so that the electron can flow in the conductor easily. The negative terminal of the battery is at lower potential and the positive terminal of the battery is at higher potential.

The electron moves from lower potential to higher potential but the direction of the current is opposite to the direction of the electron.

A positive charge is moved from a higher potential to a lower potential but the negative charge moves from a lower potential to a lower potential.

In the given problem, a positive charge is moving from rest under the influence of an electric potential. Therefore, the correct option is (a).

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As part of an interview for a summer job with the Coast Guard, you are asked to help determine the search area for two sunken sh

MrMuchimi

Answer: $37^{\circ}$ North of west

Explanation:

Given

40,000-ton luxury line traveling 20 knots towards west and

60,000 ton freighter traveling towards North with 10 knots

suppose v is the common velocity after collision

conserving momentum in west direction

$20\times 40,000=(20,000+60,000)v\cos \theta$

suppose the final velocity makes \theta angle with x axis

$v\cos \theta =10----1$

Conserving Momentum in North direction

$10\times 60,000=80,000\times v\sin\theta$

$v\sin \theta =\frac{15}{2}----2$

divide 1 and 2

$\tan \theta =\frac{3}{4}$

$\theta =37^{\circ}$

so search in the area $37^{\circ}$ North of west to find the ship

3 0

3 years ago

The deepest well from which water can be pumped, by creating a vacuum on the top end of the pipe

Ivenika [448]

Can you further elaborate this isn't making much sense my mans

7 0

3 years ago

Two cars collide at an intersection. One car has a mass of 1600 kg and is

pickupchik [31]

The combined momentum is 4000 kg m/s south

Explanation:

The total combined momentum of the two cars is given by the vector addition of the momenta of the two cars.

For this problem, we choose north as positive direction and south as negative direction.

The momentum of the first car travelling north is given by:

$p_1 = m_1 v_1$

where

$m_1 = 1600 kg$ is the mass of the car

$v_1 = +8 m/s$ is its velocity

Substituting,

$p_1 = (1600)(8)=+12800 kg m/s$

The momentum of the second car travelling south is given by:

$p_2 = m_2 v_2$

where

$m_2 = 1400 kg$ is the mass of the car

$v_2= -12 m/s$ is its velocity (negative because the car travels south)

Substituting,

$p_2 = (1400)(-12)=-16800 kg m/s$

And therefore, the combined momentum is

$p=p_1 + p_2 = +12800 + (-16800)=-4000 kg m/s$

where the negative sign means the direction of the total momentum is south.

Learn more about momentum:

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3 years ago

The following are secondary sources of energy except a.coal b crude oil c nuclear d wind e wood

monitta

Answer:

d) Wind

Explanation:

Secondary energy is energy produced by converting energy available in its natural state in the environment. Hence Wind is a primary source not a secondary source

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2 years ago

Emotions refer to the act or process of knowing. True or False

vaieri [72.5K]

Answer:

True

Explanation:

Because they are central to the human experience and are related to everything we do .

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3 years ago