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alexandr1967 [171]
3 years ago
12

How was the speed of light determined and what is it’s value?

Chemistry
1 answer:
zheka24 [161]3 years ago
5 0

The speed of light in a vacuum stands at “exactly 299,792,458 metres per second“. The reason today we can put an exact figure on it is because the speed of light in a vacuum is a universal constant that has been measured with lasers; and when an experiment involves lasers, it's hard to argue with the results.

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Can I have some help please on #2,4,5
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It differs because a steam turbine runs off of a magnetic field and a steam engine runs off of coal 

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3 years ago
PLEASEEE HELPPP I SUCK AT CHEM :(
Luda [366]

Answer:

a) H2SO4 + 2KOH -> 2H2O + K2SO4

b) 9.809 ml

Explanation:

Number of Moles = Mass/ Molar Mass

Therefore: Mass = Number of moles * Molar Mass

--------------------------------------------

Molar mass of H2SO4:

H2= 2.02

S= 32.07

O4= 64

--------------------------------------------

H2SO4 has the molar mass of 98.09

--------------------------------------------

the Moles of H2SO4 is given to be 0.100M

Therefore:

Mass= 98.09*0.1

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---------------------------------------------------

Assuming that 1 g= 1 ml, the volume of sulfuric acid is 9.809 ml.

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3 years ago
What is the formula for the compound by calcium ions and chloride ions?
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A person's heartbeat is 91 beats per minute. If his/her heart beats 3.1e9 times in a lifetime, how long (in whole years) does th
Nat2105 [25]
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Therefore,
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number of years = (34.0659 x 10^6  x 1) / 525960 = 64.76899 years.
3 0
3 years ago
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