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3 years ago

What is power when 3.2 A flows through an 18 ohm resistor?

Physics

1 answer:

vichka [17]3 years ago

4 0

To find the power formula on the electrical side you should have to know ohm's law of voltage that is V=I*R.

Here power formula is P=V*I.

Interms of resistance P=(IR)*I ==>I² R.

Here the power dissipated when 3.2 ampere of current flows through an 18-ohm resistor is

P=I² R ==>(3.2)² (18).

====>10.24(18)=184.32W.

W= Watts.

Watts is a unit of power.

Hope this helps

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A pilot drops a package from a plane flying horizontally at a constant speed. Neglecting air resistance, when the package hits t

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Answer:

The location of helicopter is behind the packet.

Explanation:

As the packet also have same horizontal velocity as same as the helicopter, and also it has some vertical velocity as it hits the ground.

The horizontal velocity remains same as there is no force in the horizontal direction. The vertical velocity goes on increasing as acceleration due to gravity acts.

So, the helicopter is behind the packet.

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3 years ago

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3 years ago

Sally runs 10,000 meter race at an average speed of 3.5m/s what does average speed mean

aleksandr82 [10.1K]

Answer:

The average speed of 3.5 m/s means that it takes Sally approximately 47.619 minutes to run 10,000 meters

Explanation:

Average speed is a scalar quantity that is given by dividing the total distance moved or traveled by an object by the time that it takes the object during the motion

The average peed indicates the rate at which the object makes a given amount of journey distance given that the journey is completed with varying speeds

With the knowledge of the average speed and the distance covered, the time for completion of the journey can be found as follows;

$Average \ speed , \overline v = \dfrac{\Delta x}{\Delta t}$

Where

$\overline v$ = Average speed of the object = 3.5 m/s

Δt = The time it takes the Sally to run 10,000 meters

Δx = The total distance Sally runs = 10,000 meters

Therefore;

$\Delta t = \dfrac{\Delta x}{ \overline v} = \dfrac{10,000 \ m}{3.5 \ m/s} = \dfrac{20,000}{7} \ s \approx 2,857.143 \ s$

The time it takes the Sally to run 10,000 meters= Δt = 20,000/7 seconds ≈ 2,857.143 seconds

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3 years ago

Q.Solve the following circuit find total resistance RT. Also find value of voltage across resister RC.

Drupady [299]

Answer:

14.57 ohms

Explanation:

Here in the figure ,Rb & R₄are in series & also Rc & R₅ are in series. As they are in series , ( Rb + R₄ ) & (Rc & R₅) are in parallel . So the equivalent resistance in that branch = ( 2 + 18 ) ║ ( 3 + 12 )

= 20 ║ 15

= (20×15) / (20 + 15)

= 8.57 ohms

Also Ra ( 6 ohm ) is in series with that branch ,. So the equivalent resistance of the whole circuit = 8.57 + 6 = 14.57 ohms.

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3 years ago