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2 years ago

Explain what an electrical current is, and describe the parts of a circuit.

Physics

1 answer:

vichka [17]2 years ago

6 0

Answer:

An electric current is a flow of particles (electrons) flowing through wires and components. It is the rate of flow of charge. If the electric charge flows through a conductor, we say that there is an electric current in the conductor. In the circuits using metallic wires, electrons constitute a flow of charges.

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An airplane flies 700 miles with a tail wind in 2.0 hrs. If it takes 2.5 hrs to cover the same distance against the headwind, th

nikklg [1K]

Answer:

B).315mph

Explanation:

Let the speed of the plane = p

Let the speed of the wind = w

Set up the system equation as;

Relative V: Time: Distance:

in wind direction: p + w 2 700

against wind: p - w 2.5 700

2(p + w) = 700

2.5(p - w) = 700

2p + 2w = 700

2.5p - 2.5w = 700

2.5 x: 5p + 5w = 1750

2 x: 5p - 5w = 1400

10p = 3150

p = 315 mph

Therefore, he speed of the plane in still air is 315 mph

6 0

4 years ago

11.) An object that is NOT accelerating could be sitting still or:

Aleonysh [2.5K]

Answer:

moving slowly is the answer

4 0

3 years ago

Read 2 more answers

In a physics lab, a 60-kg student runs up a 2.0-meter tall flight of stairs in 1.5 seconds. The work done to get to the top is 1

tester [92]

<span>The student's power rating is approximately 800W.
</span>
Power is the rate of doing work. Its SI unit is Watt. 1 W = 1J/sec

Given: <span>The work done to get to the top is 1200 Joules
</span>
Time = 1.5 seconds.

Power = $\frac{work done}{time} 
= \frac{1200J}{1.5 sec} 
= 800J/sec 
= 800W$

3 0

4 years ago

If the light rays in the incident ray originate at 20º from the surface...

Ainat [17]

Given :

The light rays in the incident ray originate at 20º from the surface.

To Find :

The angle for the incident ray.

Solution :

We know angle of incidence is measured from perpendicular to the surface .

So,

$\theta_i = 90^o - 20^o\\\\\theta_i = 70^o$

Now, we know by law of reflection :

Angle of reflection = Angle of incident

$\theta_r = 70^o$

Therefore, the angle of incident and reflection is 70° each.

5 0

3 years ago

What is a methane. please answer pysicsssssssssss

3241004551 [841]

Answer:

Methane is a colorless, odorless flammable gas which is the main constituent of natural gas. It is the simplest member of the alkane series of hydrocarbons.

Explanation:

6 0

4 years ago

Read 2 more answers