A swimmer swims north at 0.10 m/s relative to still water across a river that flows at 0.25 m/s from east to west. Calculate the
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Considering the change of units and rule of three, the number of tablets in the bottle is 2,000.
First of all, you know that each medicinal tablet has a mass of 250 mg, while the mass of all tablets is 0.5 kg. You can see that the measurements are in different units of measurement, so you must make a change of units so that they are in the same units.
So, knowing that 1 kg is equal to 1,000,000 mg, you can apply the following rule of three: if 1 kg is equal to 1,000,000 mg, 0.5 kg is equal to how many mg?
1 kg ⇒ 1,000,000 mg
0.5 kg ⇒ x mg
So:
<u><em>x= 500,000 mg</em></u>
Then, you know that each medicinal tablet has a mass of 250 mg, while the mass of all tablets is 500,000 mg. Now that the values are in the same units, to calculate the number of medicinal tablets you must apply the following rule of three: if 1 tablet has a mass of 250 mg, how many tablets have a mass of 500,000 mg?
<u><em>number of medicinal tablets= 2,000</em></u>
Finally, the number of tablets in the bottle is 2,000.
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Answer:
Explanation:
in every 20 minutes the prokaryote divides to produce one of itself .
Mathematically,
20 mins:1 of its kind
x mins :512 of its kind
Where x is the amount of time (in minutes) needed by the prokaryote to produce 512 of its kind.
This implies that,
By cross multiplying we obtain,
We now convert the time in minutes into hours.
Knowing very well that 60 minutes equals an hour, to convert 10240 minutes to hour we divide by 60.
This implies that,
Answer:
Explanation:
Given:
mass of lead chunk,
height of the fall,
- Assuming the collision to be perfectly inelastic the whole kinetic energy of the chunk is lost after the collision.
- Here when the chunk is at the given height it has a potential energy which on falling transforms into kinetic energy of the chunk.
So, increase in the internal energy of the system after the collision is :