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Mnenie [13.5K]
4 years ago
7

Carbon-13 is an isotope. It has 6 protons and _____.

Physics
2 answers:
kipiarov [429]4 years ago
8 0
And seven neutrons. i hope this helps

Pani-rosa [81]4 years ago
6 0
Carbon-13 has an atomic mass of 13. 
Atomic mass is the sum of protons and neutrons.
There are 6 protons, so there are 13 - 6 = 7 neutrons. 

Answer is 7 neutrons (and 6 electrons)
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What is the correct reason for blinking / flickering of stars? Explain it.
Rzqust [24]

Answer:

d. changing refractive index of gases in the atmosphere

Explanation:

light from a star passes through the atmosphere to reach our eyes. however, the layers of gases in the atmosphere are in constant motion, so the light gets bent and appears to be flickering.

i hope this helps! :D

6 0
3 years ago
You are pulling a suitcase through the airport at a constant speed by exerting a force of 28.0 N at an angle 30.0° from the hori
forsale [732]

The force of friction that is acting on the suitcase is the force that opposes the motion of the suitcase.

<h3>What is friction?</h3>

The force that resists the motion between two bodies in contact. There are some materials that reduces friction such as oil in a car engine reduces friction. In this example, friction creates between the motion of suitcase and with the ground.

So we can conclude that the force of friction that is acting on the suitcase is the force that opposes the motion of the suitcase.

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8 0
2 years ago
What is one example of refraction
maxonik [38]
Refraction of light is the process we take advantage of when we use eyeglasses.
7 0
3 years ago
When did newton publish his laws of motion
Degger [83]

Answer:

The three laws of motion were first compiled by Isaac Newton in his Philosophiæ Naturalis Principia Mathematica (Mathematical Principles of Natural Philosophy), first published in 1687.

Explanation:

4 0
3 years ago
A uniform metal bar 100cm long balances at 20cm mark when a mass of 1.5kg is attached at 0cm mark calculate the weight of the ba
beks73 [17]

Answer:

30 N

Explanation:

there are two forces act on the bar:

- weight of 1.5 kg mass, w = mg = 15 N

- weight of the bar, wb

for balance,

w * Lw = wb * Lwb

Lw = length of bar from the mass to the pivot

Lwb = lenght of bar from the center of the bar to the pivot

15 * 20 = wb * (50-20)

300 = wb * 30

wb = 300/30 = 30 N

4 0
3 years ago
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