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3 years ago

15

A liquid in a simple thermometer expands at a predictable rate as temperature increases. This is just one example of linear expa

nsion. Complete the table below to summarize the variables of the linear expansion equation.
Variable Name Description of variable
Lo

a

/\L

/\T

2 answers:

aleksley [76]3 years ago

8 0

Answer:

lo

Explanation:

idk

Sever21 [200]3 years ago

4 0

Answer: lo

Explanation:

Its the answer

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10 POINTS + BRAINLIEST TO FIRST CORRECT ANSWER! :)

enyata [817]

Answer:

The 2nd option

Explanation:

It slows down the transfer of thermal energy from inside to outside the coat.

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3 years ago

A bob of mass m = 0.250 kg is suspended from a fixed point with a massless string of length L = 22.0 cm. You will investigate th

katen-ka-za [31]

To solve the problem, it is necessary to use the concepts of gravitational force, centripetal force and trigonometric components that can be extrapolated from the statement.

By definition we know that the Force of Gravity is given by

$F_g=mg$

Where,

m= Mass

g = Gravitational Acceleration

The centripetal force is given by,

$F_c = \frac{mv^2}{R}$

Where,

m = Mass

v = Velocity

R = Radius

For the case described in the problem, the Force of gravity the net component would be given by sin?, While for the centripetal force the net component is in the horizontal direction, therefore it corresponds to the $cos\theta$

Then,

$F_g = mg sin\theta$

$F_c = \frac{mv^2}{r}cos\theta$

From the radius we have its length but not the net height, which would be given by

$r = L sin\theta$

So equating the equations we have to

$F_g = F_c$

$mg sin\theta=\frac{mv^2}{r}cos\theta$

$mg sin\theta=\frac{mv^2}{Lsin\theta}cos\theta$

Re-arrange to find v,

$v = \sqrt{\frac{gLsin^2\theta}{cos\theta}}$

Replacing with our values

$v = \sqrt{\frac{(9.8)(22*10^{-2})(sin^2 24)}{cos24}}$

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4 years ago

Which definition best explains science? (1 point)

son4ous [18]

Answer:

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3 years ago

What type of system is earth?<br> A.Closed<br> B.Open<br> C.Connected<br> D.Isolated

adoni [48]

The earth is considered an Open system which is B.

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4 years ago

Straight wire of indefinite length (transient) passed by an electric current of 5.0 A. The magnetic field generated around this

olchik [2.2K]

Answer:

C. 2.0 cm

Explanation:

The magnetic field around the wire at point M is given by Biot-Savart Law:

$B = \frac{\mu_o I}{2\pi R}$

where,

B = Magnetic field = 50 μT = 5 x 10⁻⁵ T

I = current = 5 A

μ₀ = permeability of free space = 4π x 10⁻⁷ N/A²

R = distance of point M from wire = ?

Therefore,

$5\ x\ 10^{-5}\ T = \frac{(4\pi\ x\ 10^{-7}\ N/A^2)(5\ A)}{2\pi R}\\\\R = \frac{(2\ x\ 10^{-7}\ N/A^2)(5\ A)}{5\ x\ 10^{-5}\ T}\\$

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Hence, the correct option is:

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7 0

3 years ago