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wariber [46]
3 years ago
14

In which direction does a bag at rest move when a force of 20 Newton’s is applied from the right

Physics
1 answer:
Harrizon [31]3 years ago
5 0

Answer:

It moves in the direction in which the force is applied from.

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Three children are at work.one is pushing a chair, another is pushing the sofa and the third one is pushing an empty trolley .wh
kari74 [83]

Answer:sofa

Explanation:the weight of the mass of that object can be heavy (er) than the rest

8 0
4 years ago
In terms of the dc current I, how much magnetic energy is stored in the insulating medium of a 3- m-long, air –filled section of
Alexxandr [17]

Answer:

The answer is 138.5

Explanation:

STEP 1:

The inductance per unit length of a coaxial transmission line is

L′=L<em>/ </em>I

 =Ø/H

=μoI/2π In (b/a)

In this a is the radius of inner conductor

b is the radius of outer conductor

I is the coaxial transmission

μ is the magnetic permeability

Since the transmission of the charge exists in air, the value of the relative permeability is μr= I and permeability of free space is μo=  4π x 10-7 H/m . So the magnetic permeability will be

μ = μoμ r

μ =μ o(I) 4π x 10-7 H/m

L′= μoI/2π In (b/a)

  = (4π x 10-7 ) (2)/2π In (10/5)

  =2.77 x 10-7 H

STEP 2:

Obtain the magnetic energy stores in the magnetic field H of a volume of the coaxial transmission line containing a material with permeability μ, by using the formula given below:

Wm= 1/2 LI^2

      = 1/2 (2.77x 10^-7 I^2

      = 138.5 X 10^-9 I^2 J

      Now we will simplify the equation

Wm= 185.5<em>I</em>^2 nJ

So, the magnetic energy stored in insulating medium is 185.5<em>I</em>^2 nJ

6 0
3 years ago
A tank contains 0.568 mol of molecular nitrogen (N2). Determine the mass (in grams) of nitrogen that must be removed from the ta
Marizza181 [45]

Answer:

\Delta M = 7.812 gm

Explanation:

we know that for ideal gag we have

pV =nRT

Since volume, gas constant R and T are constant, so we have

\frac{p}{n]  = constant

\frac{44.7}{0.568} =\frac{22.8}{n}

n = 0.289 mole

hence mass removed\Delta M =( 0.568 - 0.289)*( molecular\ weight\ of \ nitrogen)

\Delta M = (0.568 - 0.289) *28 gm

\Delta M = 7.812 gm

8 0
4 years ago
What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?
Scrat [10]

when observer and source moves relative to each other then the frequency received by the observer is different from the real frequency

This apparent change in frequency due to relative motion is known as Doppler's effect.

Here we know that

f_{app} = f_o\frac{v\pm v_o}{v \pm v_s}

here we know that

f_o = real frequency

v = speed of sound

v_o = speed of observer

v_s = speed of source

so this is known as Doppler's Effect

6 0
4 years ago
Read 2 more answers
What are stepdown transformers used for
lesya692 [45]

Answer:

Step down transformers are used in power adaptors and rectifiers to efficiently decrease the voltage. They are also used in electronic SMPS.

Explanation:

pls mark me as brainlist

Thanks a lot

7 0
3 years ago
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