<h3>Concave or diverging lens is needed correct the vision of a nearsighted person whose far point is 30.0 cm</h3>
<em><u>Solution:</u></em>
Nearsighted person will not be able to see the distant objects clearly
Now, we want the near sighted person to see the distant objects clearly
<em><u>The lens equation is given as:</u></em>
For distant vision, 
The image of 30 cm from eye will be 28.5 cm to left of spectacle lens
Therefore,
From lens equation,
The negative power -3.51 D denotes that a concave or diverging lens is needed
The speed of Nancy who ran a distance of 5 km in 30 minutes is 10000 meters(m) per hour(h).
<h3>What is the rate of speed?</h3>
The rate of speed is the rate at which the total distance is travelled in the time taken. Rate of speed can be given as,
Here, (d) is the distance travelled by the object and (t) is the time taken but the object to cover that distance.
Nancy ran a distance of 5 km in 30 minutes. There are 60 minutes in one hour. Thus, the time in hour for which Nancy ran is,
The meters in 5 kilometers is,
She ran 5000 kilometers in 0.5 hours. Thus, the speed of her is,
Thus, the speed of Nancy who ran a distance of 5 km in 30 minutes is 10000 meters(m) per hour(h).
Learn more about the rate of speed here:
brainly.com/question/359790
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<span>The California current on the west coast which runs from north to south and the Gulf Stream on the East coast which runs from south to north.</span>
Being the planet closest to the sun, Mercury must be the one
with the shortest year. That's how gravity works.
