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OLEGan [10]
3 years ago
6

Accuracy in scientific investigation is important because

Physics
1 answer:
77julia77 [94]3 years ago
6 0
It ensures good results
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A spring vibrates 120 times in 2 mins find its frequency and time period​
german

2 minutes is 120 seconds, so if you were finding vibrations per minute, it would be 60 times a minute.

3 0
2 years ago
A 49.3 g ball of copper has a net charge of 2.0 µc. what fraction of the copper's electrons has been removed? (each copper atom
Serggg [28]
First, find how many copper atoms make up the ball: 
 moles of atoms = (49.3 g) / (63.5 g per mol of atoms) = 0.<span>77638</span><span>mol 
</span> # of atoms = (0.77638 mol) (6.02 × 10^23 atoms per mol) = 4.6738*10^23<span> atoms </span>

<span> There is normally one electron for every proton in copper. This means there are normally 29 electrons per atom:
</span> normal # electrons = (4.6738 × 10^23 atoms) (29 electrons per atom) = <span> <span>1.3554</span></span><span>× 10^25 electrons 
</span>
<span> Currently, the charge in the ball is 2.0 µC, which means -2.0 µC worth of electrons have been removed.
</span><span> # removed electrons = (-2.0 µC) / (1.602 × 10^-13 µC per electron) = 1.2484 × 10^13 electrons removed
 
</span><span> # removed electrons / normal # electrons = </span>
<span>(1.2484 × 10^13 electrons removed) / (1.3554 × 10^25 electrons) = 9.21 × 10^-13 </span>

<span> That's 1 / 9.21 × 10^13 </span>
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3 years ago
The distance a softball is pitching from mound to the batter is
MAVERICK [17]
Well, the baselines are 65 feet, and the distance from home plate to pitcher's mound is 50 feet. So I believe your answer would be 50 feet.


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In a department store an airstream from a hose connected to the exhaust of a vacuum cleaner blows upward at an angle and support
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The air blows under the ball to support it.
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On a far-away (hypothetical) planet, a student is conducting an experiment to study vertical motion. The student fires a cannon
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Yeah it’s pretty much positive
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