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Vikentia [17]
3 years ago
8

If this atom has a balanced charge, how many protons would you expect to find in this atom

Physics
2 answers:
guapka [62]3 years ago
8 0
Then, number of protons would be equal to number of electrons.
Pachacha [2.7K]3 years ago
4 0
The same number as the number of electrons in the cloud.
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Suppose an element had an atomic number of 52. How many protons would that element have?
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The graph at the right shows the force needed to pull a bow back as the string is pulled further and further.
Sindrei [870]

A. 9 J

In a force-distance graph, the work done is equal to the area under the curve in the graph.

In this case, we need to extrapolate the value of the force when the distance is x=30 cm. We can easily do that by noticing that there is a direct proportionality between the force and the distance:

F=kx

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B. 24.5 m/s

The mass of the arrow is m=30 g=0.03 kg. The kinetic energy of the arrow when it is released is equal to the work done by pulling back the bow for 30 cm:

W=K=\frac{1}{2}mv^2

where m is the mass of the arrow and v is its speed. By re-arranging the formula and using W=9 J, we find the speed:

v=\sqrt{\frac{2W}{m}}=\sqrt{\frac{2\cdot 9J}{0.03 kg}}=24.5 m/s

8 0
3 years ago
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