A thermographic camera or thermal imaging camera is a device that

Physics

1 answer:

guapka [62]3 years ago

6 0

Answer:

Using thermal imaging to detect heat energy loss through the roof and windows.

Explanation:

Heat energy is transmitted by conduction, convection, and radiation.

All warm objects emit heat energy in the form of infrared radiation, which is a kind of invisible light (light with a lower frequency and longer wavelentgh than the visible light).

The amount of heat energy emitted by an object is proportional to its temperature: the higher the temperature of the object body, the greater the amount of radiant energy emitted.

A house can loss heat energy by radiation through the walls, roof and windows.

A thermographic camera or thermal imaging camera will detect the infrared radiation emitted through walls, roof and windows, showing a red image in those areas.

I found the image attached in internet, showing the red areas around the roof and windows of a house, mainly, using a thermal imaging camera.

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Charge Q is distributed uniformly throughout the volume of an insulating sphere of radius R = 4.00 cm. At a distance of r = 8.00

Elena L [17]

Answer:

$2.62898\times 10^{-6}\ C/m^3$

$1979.99974\ N/C$

Explanation:

k = Coulomb constant = $8.99\times 10^{9}\ Nm^2/C^2$

Q = Charge

r = Distance = 8 cm

R = Radius = 4 cm

Electric field is given by

$E=\dfrac{kQ}{r^2}\\\Rightarrow Q=\dfrac{Er^2}{k}\\\Rightarrow E=\dfrac{990\times 0.08^2}{8.99\times 10^{9}}\\\Rightarrow Q=7.04783\times 10^{-10}\ C$

Volume charge density is given by

$\sigma=\dfrac{Q}{\dfrac{4}{3}\pi R^3}\\\Rightarrow \sigma=\dfrac{7.04783\times 10^{-10}}{\dfrac{4}{3}\pi (0.04)^3}\\\Rightarrow \sigma=2.62898\times 10^{-6}\ C/m^3$