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3 years ago

Charcoal appears black in color because it

2 answers:

4 0

C. This is the idea of "black body radiation". Charcoal/carbon is a "perfect black body". Absorbs all radiation. There's a whole host of stuff about this in physics, including, I think, Planck's (Nobel Prize winner) black body radiation theory.

Natalka [10]3 years ago

3 0

I think the answer is C but correct me if im wrong hope this helps :)

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A 200 N trash can is pulled across the sidewalk by a person at constant speed by a force of 75 N. What is the coefficient of fri

Pavel [41]

Answer:

μ = 0.375

Explanation:

F = Applied force on the trash can = 75 N

W = weight of the trash can = 200 N

f = frictional force acting on trash can

Since the trash can moves at constant speed, force equation for the motion of can is given as

F - f = 0

75 - f = 0

f = 75 N

μ = Coefficient of friction

frictional force is given as

f = μ W

75 = μ (200)

μ = 0.375

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3 years ago

Which nucleus complete the following equation

rosijanka [135]

Explanation:

$^{212}_{86}\text{Rn} \rightarrow \:^4_2\text{He} + \:^{208}_{84}\text{Po}$

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3 years ago

What are the names of the four hemispheres of the earth

xenn [34]

Explanation:

Northern, Southern, Eastern, and Western.

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3 years ago

Can anyone help me out with this

suter [353]

I’m assuming it’s A earth.

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3 years ago

A cycle lasts for 8 seconds. what is the frequency

Afina-wow [57]

This frequency definition leads us to the simplest frequency formula: f = 1 / T . f denotes frequency and T stands for the time it takes to complete one wave cycle measured in seconds. The SI frequency unit is Hertz (Hz), which equals 1/s (one cycle per second)

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Hope It Helps!

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3 years ago