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3 years ago

Which of the following statements best contrasts thermal energy transfer through radiation, conduction, and convection

Physics

1 answer:

ankoles [38]3 years ago

4 0

Explanation :

Thermal energy transfer through conduction, conduction involves the direct transfer of heat from one object to another object that is contacted.

Thermal energy transfer through convection, convection involves the movement of warm particles.

Thermal energy transfer through radiation, radiation involves the movement of electromagnetic waves.

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A 10.0 cm object is 5.0 cm from a concave mirror that has a focal length of 12 cm. What is the distance between the image and th

fiasKO [112]

Let's use the mirror equation to solve the problem:
$\frac{1}{f}= \frac{1}{d_o}+ \frac{1}{d_i}$
where f is the focal length of the mirror, $d_o$ the distance of the object from the mirror, and $d_i$ the distance of the image from the mirror.
For a concave mirror, for the sign convention f is considered to be positive. So we can solve the equation for $d_i$ by using the numbers given in the text of the problem:
$\frac{1}{12 cm}= \frac{1}{5 cm}+ \frac{1}{d_i}$
$\frac{1}{d_i}= -\frac{7}{60 cm}$
$d_i = -8.6 cm$
Where the negative sign means that the image is virtual, so it is located behind the mirror, at 8.6 cm from the center of the mirror.

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3 years ago

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Which of the following graphs represents constant positive acceleration

nika2105 [10]

W, because as time is moving up at a consistent rate the speed is as well, creating the straight line.

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3 years ago

Use newton's method to find the second and third approximation of a root of

Nina [5.8K]

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3 years ago

What best describes the direction of the electric field on a spherical equipotential surface?

Alla [95]

Answer:

Perpendicular to the surface

Explanation:

- Electric field lines represent the direction of the electric field. The electric field lines also correspond to the direction along which the gradient of the electric potential is maximum.

- Equipotentials are lines or surfaces along which the electric potential is constant: the electric potential does not change moving along an equipotential surface.

Given the two definitions, equipotential lines are always perpendicular to the electric field lines. Therefore, in this problem, the direction of the electric field is perpendicular to the spherical equipotential surface.

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What type of energy transformation is demonstrated in the above diagram?

Svetach [21]

Answer:

C :)

Explanation:

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