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4 years ago

Battery of 12 V supplies charge of 1000 C to a device work battery

Physics

1 answer:

Y_Kistochka [10]4 years ago

5 0

Answer:

W = 12 kJ

Explanation:

We have,

Voltage of a battery is 12 V

Charge supplied by the battery is 1000 C

It is assumed to find the work is done by the battery in moving the charge. The work done is given in terms of voltage as :

$W=qV\\\\W=1000\times 12\\\\W=12000\ J$

W = 12 kJ

So, the work of 12 kJ is done by battery in moving charges.

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Answer:

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3 years ago

Hillary is dropping objects that are the same volume. She wants to investigate how an object’s mass affects the average speed at

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Answer:

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Explanation:

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3 years ago

A small airplane is sitting at rest on the ground. Its center of gravity is 2.58 m behind the nose of the airplane, the front wh

otez555 [7]

Answer:

The percentage of the weight supported by the front wheel is A= 19.82 %

Explanation:

From the question we are told that

The center of gravity of the plane to its nose is $z = 2.58 m$

The distance of the front wheel of the plane to its nose is $l = 0.800\ m$

The distance of the main wheel of the plane to its nose is $e = 3.02 \ m$

At equilibrium the Torque about the nose of the airplane is mathematically represented as

$mg (z- l) - G_B *(e - l) = 0$

Where m is the mass of the airplane

$G_B$ is the weight of the airplane supported by the main wheel

$G_B =\frac{mg (z-l)}{(e - l)}$

Substituting values

$G_B =\frac{mg (2.58 -0.8 )}{(3.02 - 0.80)}$

$G_B = 0.8018 mg$

Now the weight supported at the frontal wheel is mathematically evaluated as

$G_F = mg - G_B$

Substituting values

$G_F = mg - 0.8018mg$

$G_F = (1 - 0.8018) mg$

$G_F = 0.1982 mg$

Now the weight of the airplane is = mg

Thus percentage of this weight supported by the front wheel is $A = 0. 1982 *100 =$ 19.82 %

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4 years ago

A loudspeaker in a parked car is producing sound whose frequency is 20950 Hz. A healthy young person with normal hearing is stan

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Answer:

359 m/s

Explanation:

Highest frequency a person can hear is 20,000Hz.

f = c × λ

Frequency = Wave speed × Wavelength

Wavelength = 20,000 ÷ 343 = 58.31m

Wavespeed = Frequency ÷ Wavelength

c = 20,950 ÷ 58.31 = 359.3 m/s

= 359 m/s (3 s.f.)

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3 years ago

"The two equations below express conservation of energy and conservation of mass for water flowing from a circular hole of radiu

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Answer:

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3 years ago