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3 years ago

Which three forms of light are invisible light?

Physics

2 answers:

HACTEHA [7]3 years ago

8 0

Answer: (B,C,E). The infrared rays, radio waves and x-rays are forms of light are invisible light.

Explanation:

We know that,

The electromagnetic spectrum shows the wave length of the electromagnetic radiation of visible light.

Human eyes can detect the visible light. The wave length of the visible light is 380 nm to 750 nm. Violet light has low frequency and red light has the high frequency.

Human eyes can't detect the invisible light. Radio waves, X-rays and infrared rays are comes in the invisible light. these wave length is shorter compare to visible light.

The wave length of the Radio waves, X-rays and infrared rays defined as:

Radio waves = 1 mm to 10000 km

X-rays = 0.01 m to 10 nm

Infrared rays = 700 nm to 1 mm

Hence, The infrared rays, radio waves and x-rays are forms of light are invisible light.

Flauer [41]3 years ago

3 0

Radio waves
infrared
x-rays
and red and blue light are not a thing, their on a color spectrum called visible light.

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After a water had boiled, the temperature of the water decreases by 22degrees. The mass of the water in the kettle is 0.50kg.The

kifflom [539]

<u>Answer</u>

46,200 J

The energy of given out when a substance is losing heat is given by:

H = mcΔθ

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c is the specific heat capacity of the substance and

Δθ is the temperature change.

H = 0.50 × 22 4200

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4 years ago

Which experiment best shows water’s ability to act as a solvent? raise the temperature of water and record its boiling point. fr

IrinaVladis [17]

The vanishing of an ionic solid (like table salt) would be an example of acting like a solvent

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3 years ago

Read 2 more answers

In a candy factory, the nutty chocolate bars contain 20.0 % pecans by mass. If 4.0 kg of pecans were used for candy last Tuesday

ladessa [460]

Answer:

44.09 pounds

Explanation:

We got that 20 % of the mass of a nutty chocolate bar its pecans, if 4.0 kg of pecans were used, we need to find the X in the equation

$0.2 * X = 4.0 \ kg$

where X its the total mass of nutty chocolate bars produced. So, we can just divide by 0.2 on both sides, and we find:

$X = 4.0 kg / 0.2$

$X = 20.0 \ kg$

Of course, we need the total mass produced in pounds, and not in kilograms. Looking at an conversion table, we can find that 1 kg its 2.20462 pounds, multiplying the value for total mass produced by the conversion factor we get:

$X = 20.0 \ kg * 2.20462 \ \frac{pounds}{kg}$

$X = 44.0924 \ pounds$

Now, we just need to round off to two significant figures. This is:

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the total mass of nutty chocolate bars made last Tuesday to two significant figures.

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4 years ago

A 75Kg man jumps from a window 1.0m above the sidewalk. If the man falls with his knees and ankles locked, the only cushion for

liq [111]

Answer:

150153.06122 N

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m = Mass of person = 75 kg

h = Height of fall = 1 m

g = Acceleration due to gravity = 9.81 m/s²

F = Force

s = Displacement = 0.49 cm

Potential energy is given by

$P=mgh\\\Rightarrow P=75\times 9.81\times 1\\\Rightarrow P=735.75\ J$

Work is given by

$W=Fs\\\Rightarrow F=\frac{W}{s}\\\Rightarrow F=\frac{735.75}{0.0049}\\\Rightarrow F=150153.06122\ N$

The average force exerted is 150153.06122 N

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3 years ago

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Allushta [10]

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3 years ago