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3 years ago

Which physical property refers to the temperature at which a substance in a solid-state transforms to a liquid state?

2 answers:

5 0

<h2>The answer is C. Melsting point </h2><h3 /><h3>Explanation: The melting point of a substance is the temperature at which substance transforms from a solid state into a liquid state.</h3>

solmaris [256]3 years ago

3 0

Answer:

C: Melting point

Explanation:

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A very long line of charge with charge per unit length +8.00 μC/m is on the x-axis and its midpoint is at x = 0. A second very l

artcher [175]

Answer:

at y=6.29 cm the charge of the two distribution will be equal.

Explanation:

Given:

linear charge density on the x-axis, $\lambda_1=8\times 10^{-6}\ C$

linear charge density of the other charge distribution, $\lambda_2=-6\times 10^{-6}\ C$

Since both the linear charges are parallel and aligned by their centers hence we get the symmetric point along the y-axis where the electric fields will be equal.

Let the neural point be at x meters from the x-axis then the distance of that point from the y-axis will be (0.11-x) meters.

<u>we know, the electric field due to linear charge is given as:</u>

$E=\frac{\lambda}{2\pi.r.\epsilon_0}$

where:

$\lambda=$ linear charge density

r = radial distance from the center of wire

$\epsilon_0=$ permittivity of free space

Therefore,

$E_1=E_2$

$\frac{\lambda_1}{2\pi.x.\epsilon_0}=\frac{\lambda_2}{2\pi.(0.11-x).\epsilon_0}$

$\frac{\lambda_1}{x} =\frac{\lambda_2}{0.11-x}$

$\frac{8\times 10^{-6}}{x} =\frac{6\times 10^{-6}}{0.11-x}$

$x=0.0629\ m$

∴at y=6.29 cm the charge of the two distribution will be equal.

9 0

3 years ago

A baseball is thrown horizontally from a cliff at 30 m/s and lands 7 seconds after the baseball was thrown. Calculate the horizo

ASHA 777 [7]

Answer:

The horizontal and vertical distances are x = 210 m and y = -240.35 m, respectively.

Explanation:

Using the equation of the displacement in the x-direction, we have:

(let's recall we have a constant velocity in this direction)

$x=v_{ix}t$

Where:

v(ix) is the initil velocity in the x direction (v(ix) = 30 m/s)
t is the time (t = 7 s)

$x=30(7)$

$x=210\: m$

Now, we need to use the equation of the displacement in the y-direction to find the vertical distance. Here we have an acceleration (g)

$y=v_{iy}t-\frac{1}{2}gt^2$

Where:

v(iy) is the initial velocity at the y-direction. In this case, it will be 0
t is the time
g is the acceleration of gravity (g=9.81 m/s²)

Then, the vertical position at 7 s is:

$y=-\frac{1}{2}(9.81)(7)^2$

$y=-240.35\: m$

Therefore, the horizontal and vertical distances are x = 210 m and y = -240.35 m, respectively. The minus sign means the <u>negative value in the y-direction.</u>

I hope it helps you!

7 0

3 years ago

Positive psychologists believe that happiness can be increased by

Elenna [48]

The answer is positive thoughts

5 0

4 years ago

Read 2 more answers

La taille d'un molécule d'eau est 0,4nm

pogonyaev

2mm.
0,4x 5x10^6 = 2x10^6
1nm = 1x10^-6mm
2x10^6nm = 2mm.