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Bumek [7]
3 years ago
8

X-rays of epiphyses enable doctors to estimate children’s ________

Physics
1 answer:
Mars2501 [29]3 years ago
7 0
<h3><u>Answer;</u></h3>

Skeletal age

<h3><u>Explanation;</u></h3>
  • Epiphyses are the rounded portions at the ends of a bone separated from the metaphysis by the physis. The epiphysis contributes to a joint, compared with an apophysis which is a site of tendon or ligament attachment.
  • A bone age study helps doctors estimate the maturity of a child's skeletal system. It's usually done by taking a single X-ray of the left wrist, hand, and fingers.
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what is the kinetic energy of a 1 kilogram ball is thrown into the air with an initial velocity of 3 m/sec
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Data:
m (mass) = 1 Kg
s (speed) = 3 m/s
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E_{k} =  \frac{m*s^2}{2}

Solving:
E_{k} = \frac{m*s^2}{2}
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\boxed{\boxed{E_{k} = 4.5\:J}}\end{array}}\qquad\quad\checkmark
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a ball is dropped from rest at a height of 89m above the ground. (a)what is it's speed just before it hits the ground? (b) how l
kykrilka [37]

Answer:

(a) 41.75m/s

(b) 4.26s

Explanation:

Let:

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Time Taken, t = ?

With the distance formula, which is

D = ut + \frac{1}{2} gt^2

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89 = \frac{1}{2}×9.8×t^{2}

With the equation above, we can solve for t:

t=\sqrt{\frac{89(2)}{9.8}} \\t=\sqrt{\frac{178}{9.8} } \\t=\sqrt{18.16} \\t=4.26 seconds

Now that we have solved t, we can use the following velocity formula to solve for v:

v = u + at, where a is also equals to g, so we have

v = u + gt

By substituting u = 0, g = 9.8, and t = 4.26,

We have:

v = 0 + 9.8(4.26)\\v = 41.75m/s

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