Given :
The ball of a ballpoint pen is 0.5 mm in diameter and has an ASTM grain size of 12.
To Find :
How many grains are there in the ball?
Solution :
Volume of ball of the ballpoint is :

Now, grain size of 12 has about 520000 grains/mm³.
Therefore, number of grains are :

Answer:
A car accelerates uniformly from 5m/s to 10m/s in 5s ...
A car starts from rest and picks up a velocity of 20 m/s ...
A car accelerates uniformly from 10m/s to 20m/s in 5 ...
How much work is required to accelerate a 1000 kg car ...
More results from<u> www.quora.com</u>
Explanation:
This is one method of how infectious diseases like skin infections spread. Keeping the gym clean is essential to maintaining everyone's health and safety.
<h3>Which skin illness is the worst?</h3>
Necrotising fasciitis is just a severe infection of the skin, including tissue beneath the skin, and the fascia (the fibrous tissue that divides muscles and organs), which causes necrosis, or the death of tissue. If not identified and treated promptly, the infection spreads quickly, is lethal.
<h3>A skin infection: how do you treat it?</h3>
Depending on the infection's origin and intensity, different treatments are available. It may take days or weeks for some viral skin infections to heal on their own. Antibiotics taken orally or administered topically to the skin are frequently used to treat bacterial infections.
To know more about skin infection visit;
brainly.com/question/7656575
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The correct answer is B: a set of dimensions
Answer:
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