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4 years ago

Night vision glasses detect energy given off by objects as

2 answers:

8 0

<span>Night vision glasses detect energy given off by objects as infrared waves. Infrared is a light rays that are longer than a light but shorter that radio waves. Thank you for posting your question here. I hope my answer helps. </span>

Yuliya22 [10]4 years ago

6 0

Answer:

It detects the Infrared waves and use it to form image

Explanation:

As we know that all objects which are at temperature greater than zero kelvin.

So here when we use night vision glasses then in this case glass has property to detect the infrared waves radiated by the objects which are at room temperature.

So these night vision lens are sensitive to infrared waves and they used that part of the spectrum to form the image of an object.

Since at room temperature the spectrum given by the objects are lying in the range of visible range so here we can say that it is not visible at that lower temperature by their own.

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An insulated Thermos contains 140 cm3 of hot coffee at 85.0°C. You put in a 15.0 g ice cube at its melting point to cool the cof

Pavel [41]

Answer:

$T = 69^o C$

Explanation:

Here at thermal equilibrium we can say that thermal energy given by Hot coffee is equal to the thermal energy absorbed by ice cubes

So here we have

$Q_{ice} = Q_{coffee}$

now since ice cubes are added into coffee when it is at melting temperature

So here we can say that final temperature of coffee is T degree C

Now we have

$m_1L + m_1c_1\Delta T_1 = m_2c_2\Delta T_2$

here we have

$m_1 = 15 gram$

L = 333 kJ/kg = 333 J/g[/tex]

$c_1 = c_2 = 4186 J/kg C = 4.186 J/g C$

$\Delta T_1 = T - 0$

$\Delta T_2 = 85 - T$

now we have

$15(333) + 15(4.186)(T - 0) = 140(4.186)(85 - T)$

$4995 + 62.79T = 49813.4 - 586.04T$

$648.83 T = 44818.4$

$T = 69^o C$

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3 years ago

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olga nikolaevna [1]

Answer:

Explanation:

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4 0

3 years ago

A loop of wire is placed in a uniform magnetic field. For what orientation of the loop is the magnetic flux a maximum? For what

andreyandreev [35.5K]

Answer:

The flux is calculated as φ=BAcosθ. The flux is thereforemaximum when the magnetic field vector is perpendicular to theplane of the loop. We may also deduce that the flux is zero whenthere is no component of the magnetic field that is perpendicularto the loop.

when angle is zero then flux is maximium because when angle zerocos is maximium

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3 years ago

I Need answer ASAP

anzhelika [568]

Answer: Convection and conduction

Tell me that I got it right??

Explanation

Mark me as Brainliest PLEASE I HAVE 0 BRAINLIEST

3 0

3 years ago

Read 2 more answers