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adoni [48]
3 years ago
11

What is the total number of neutrons in an atom of an element that has a mass number of 19 and an atomic number of 9?

Physics
1 answer:
FromTheMoon [43]3 years ago
7 0
Your answer should be B.) 10

The atomic mass of an element is the sum of the element's protons and neutrons. The atomic number of an element is equal to its number of protons. To find the amount of neutrons in an atom, subtract the atomic number from the atomic mass. 19 - 9 = 10.

Hope this helps!
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vredina [299]

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5 0
3 years ago
Read 2 more answers
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Luden [163]

Here it is given that initial speed of the package will be same as speed of the helicopter

v_i = 5.10 m/s

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now by kinematics

y = v* t + \frac{1}{2}at^2

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by solving above equation we have

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7 0
3 years ago
Class II levers like ankles and wheelbarrows are useful because they provide mechanical advantage, by amplifying the input force
marusya05 [52]

Answer:

The solution and the explanation are in the Explanation section.

Explanation:

According to the diagram that is in the attached image, the EFFORT force at point A and the load is at O point. The torque due to weight is:

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The torque due to effort at C point is:

TC = E * (b * cosθ)

The net torque is equal to 0, we have:

Tnet = 0

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8 0
3 years ago
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Answer:

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Explanation:

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6 0
2 years ago
What is the transition from a gas to a liquid?
postnew [5]
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