The focal length of a lens needed by a woman whose near point is 50cm from her eyes is 50cm.
To find the answer, we have to know about the focal length of correcting lens.
<h3>How to find the focal length of correcting lens?</h3>
Thus, we can conclude that, the focal length of a lens needed by a woman whose near point is 50cm from her eyes is 50cm.
Learn more about the focal length here:
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Answer:
A)
B)
Explanation:
A) Using the Archimedes' force we can find the weight of water displaced:
Where:
: is the weight of the block in the air = 20.1 N
: is the weight of the block in the water = 15.3 N
Now, the mass of the water displaced is:
The volume of the block can be found using the mass of water displaced and the density of the water:
B) The density of the block can be found as follows:
I hope it helps you!
Average speed is defined as total distance moved in total interval of time
so it is given as
now here is we show distance by "d" and time by"t"
then we will have mathematical expression as follows