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3 years ago

12

What is the local, day-by-day changes in the atmoshpheres condition called? A. climate B. weather C. temperature D. precipitatio

n

1 answer:

zvonat [6]3 years ago

3 0

Answer:

B.

Explanation:

Weather changes daily and varies in different areas around the world

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What are devices that move atomic nuclei at extremely high speeds

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Particle accelerators is your answer

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3 years ago

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A rock has a mass of 127 grams and displaces 32.1 mL of water. what is the density of the rock?

anzhelika [568]

Answer:

3.96 g/cm^3

Explanation:

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4 years ago

What is the ratio of surface area to volume for a sphere with the following measurements?

NeTakaya

Surface of a sphere=4πr²
volume of a sphere=(4/3)πr³
Data:
surface area =432 m²
volume=864 m³

ratio of surface area to volume=surface area / volume
ratio=432 / 864 =0.5

Answer. The ratio would be 0.5

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4 years ago

Using a spectrophotometer, and a cuvette with a path length of 1 cm you measure the absorbance (A275) of Guanosine to be 0.70. C

Anton [14]

Answer : The concentration of guanosine in your sample is, $8.33\times 10^{-5}M$

Explanation :

Using Beer-Lambert's law :

$A=\epsilon \times C\times l$

where,

A = absorbance of solution = 0.70

C = concentration of solution = ?

l = path length = 1.00 cm

$\epsilon$ = molar absorptivity coefficient guanosine = $8400M^{-1}cm^{-1}$

Now put all the given values in the above formula, we get:

$0.70=8400M^{-1}cm^{-1}\times C\times 1.00cm$

$C=8.33\times 10^{-5}M$

Thus, the concentration of guanosine in your sample is, $8.33\times 10^{-5}M$

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3 years ago

1. Which of the following equations is balanced?

pantera1 [17]

The answer would be A

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3 years ago