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3 years ago

Most objects emit infrared energy. how do humans recognize this?

Physics

2 answers:

Darina [25.2K]3 years ago

5 0

Humans can recognise by hemophile

NemiM [27]3 years ago

3 0

Infrared radiations can be detected by a thermopile

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Places with a constant temperature are most likely to be located

Katen [24]

Next to oceans due to high specific heat of sea water.

7 0

4 years ago

What is the critical angle for the interface between water and light flint? nflint= 1.58, nwater=1.33?

Angelina_Jolie [31]

When light crosses the interface between a medium with higher refractive index and a medium with lower refractive index, there is a maximum value of the angle of incidence after which there is no refraction, but all the light is reflected, and this maximum value is called critical angle.

The critical angle is given by
$\theta_C = \arcsin ( \frac{n_2}{n_1} )$
where n1 is the refractive index of the first medium while n2 is the refractive index of the second medium. In our problem, n1=1.33 and n2=1.58, so the critical angle is
$\theta_C = \arcsin ( \frac{1.33}{1.58} )=57.3 ^{\circ}$

3 0

3 years ago

Someone help please i need to finish this

ICE Princess25 [194]

Answer:

Fluorine

Explanation:

The more number of electrons on the outer shell makes the atom more reactive

8 0

3 years ago

Recall that weight is a force and is equal to m*g, where g is the acceleration due to gravity exerted by the Earth near the Eart

Marysya12 [62]

Answer:

145.43 N

Explanation:

Weight is given by (mg)

where m = mass of the body

g = acceleration due to gravity

mass is constant everywhere and is equal to 77.1 kg, both on the earth and on the moon.

But the acceleration due to gravity exerted by the moon near the moon's surface is 16.6% that of Earth,

g(moon) = 0.166 g(earth) = 0.166 × 9.8 = 1.6268 m/s²

Weight on the moon = mg(moon) = (77.1×1.6268) = 125.43 N

3 0

3 years ago

Which of the following vehicles has the most kinetic energy? A. a 300kg motorcycle traveling 60km/h B. a 1,100kg car traveling 6

Andrei [34K]

Explanation:

Kinetic energy of an object is given by :

$E=\dfrac{1}{2}mv^2$

Where

m is mass and v is velocity of the object

A. Mass, m = 300 kg.

Speed, v = 60 km/h = 16.67 m/s

$E=\dfrac{1}{2}\times 300\times 16.67^2\\\\=41683.33\ J$

B. Mass, m = 1100 kg.

Speed, v = 60 km/h = 16.67 m/s

$E=\dfrac{1}{2}\times 1100\times 16.67^2\\\\=152838.89\ J$

C. Mass, m = 900 kg.

Speed, v = 80 km/h = 22.22 m/s

$E=\dfrac{1}{2}\times 900\times 22.22^2\\\\=222177.78\ J$

D. Mass, m = 2000 kg.

Speed, v = 50 km/h = 13.88 m/s

$E=\dfrac{1}{2}\times 2000\times 13.88^2\\\\=192654.4\ J$

The kinetic energy in case C is maximum.

7 0

3 years ago