The convex lens of a magnifying glass is used to focus sunlight, as shown. Which of the lettered parts of the lens diagram repre
sents the focal point?
Part A - the imaginary vertical line that divides the lens in half
Part B - the point at which the light converges on the other side of the lens
Part C - the distance between the optical center and where light converges
Part D - the point in the center of the lens
Part A - the imaginary vertical line that divides the lens in half
Part B - the point at which the light converges on the other side of the lens
Part C - the distance between the optical center and where light converges
Part D - the point in the center of the lens
1 answer:
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Answer:
1.65hr
Explanation:
Given parameters:
Number of labs = 5 labs
Time taken = 3 minutes
Unknown:
Time taken in hours to grade 165 labs = ?
Solution:
Let us find the rate of the teacher;
Rate =
Insert the parameters and solve;
Rate = = 1.67labs/min
Now;
Time to grade 165 labs =
Time to grade 165 labs = = 98.8min
Since;
60min = 1hr
98.8min = = 1.65hr