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4 years ago

In the formula used to solve problems related to the first law of thermodynamics what does Q represent?

1 answer:

4 0

The heat Q(in) supplied to the system in one stage of the cycle, minus the heat Q(out) removed from it in another stage of the cycle; plus the work added to the system W(in) equals the work that leaves the system W(out)

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A toroidal coil of N turns has a central radius b and a square cross section of side a. Find its self-inductance.

Xelga [282]

Answer:

$L = \frac{\mu_0 N^2 (a^2)}{2\pi b}$

Explanation:

As we know that magnetic field due to torroid is given as

$B = \frac{\mu_0 N i}{2\pi b}$

this is approximately constant magnetic field along the axis of the torroid

now the flux linked with one coil of the torroid is given as

$\phi = B.A$

$\phi = \frac{\mu_0 N i}{2\pi b}(a^2)$

now total flux of N number of coils is given as

$\phi_{total} = \frac{\mu_0 N^2 i(a^2)}{2\pi b}$

now we know that self inductance is the property of coil in which flux of the coil will link with the current in the coil

So we know that

$L = \frac{\phi}{i}$

$L = \frac{\mu_0 N^2 (a^2)}{2\pi b}$

3 0

3 years ago

If we heated the ball up and kept the ring room temperature, would the ball be able to fit through the ring? (1 point) Why or wh

Fed [463]

Answer:

no:

Explanation:

it would grow and no longer be able to fit through the loop due to the hot air expanding.

8 0

3 years ago

A soccer ball is kicked at an angle of 30° to the horizontal with an initial velocity of 16 m/s. How high does the soccer ball g

Ugo [173]

Vertical component of velocity = 16sin(30°) = 8m/s

at the highest point of flight, the velocity of the ball is 0 (that moment when it stops before starting to fall) so:
$v^2=u^2+2as$ 
$0^2=8^2+(2\times-9.81\times s)$
$s= \frac{0^2-8^2}{2\times-9.81}$ 
s=3.26m

So rounding up gives option B. (3.3m)

6 0

4 years ago

The molecule arrangement of ice, water and steam are very different. _______ has the most ordered arrangement, ______ has the ne

marysya [2.9K]

Answer:

do you still need an answer

Explanation:

because if you are i could give it to you

3 0

4 years ago

An Elephant is pulled by a group of clowns across a circus. The elephant has a mass of 1000kg and the clowns are pulling with a

ycow [4]

Answer:

Acceleration = 0.2m/s²

Explanation:

Given the following data;

Mass = 1000kg

Force = 200N

To find acceleration;

Force is given by the multiplication of mass and acceleration.

Mathematically, Force is;

$F = ma$

Where;

F represents force.

m represents the mass of an object.

a represents acceleration.

Making acceleration (a) the subject, we have;

$Acceleration (a) = \frac{F}{m}$

Substituting into the equation;

$Acceleration (a) = \frac{200}{1000}$

Acceleration = 0.2m/s²

3 0

3 years ago