Many people are in favor of the dam. Hydroelectric power is not as polluting
as other forms of electrical generation. The country is growing quickly, and
its economy is growing. The country must be able to produce more electricity
to meet everyone's needs. However, those opposed say the dams will force
many out of their homes. It will destroy an important wilderness area, and may
damage ecosystems - especially river or fjord ecosystems in Patagonia, since
silt won't be carried down rivers. Many also say that the project helps the
copper mining industry, and they believe that this project will benefit
businesses, not the people of Chile
Explanation:
Acceleration is the change in velocity over change in time.
a = Δv / Δt
a = (7 m/s − 0.8 m/s) / 15 s
a ≈ 0.413 m/s²
We define acceleration as the rate of change of the velocity
Thus, if you have positive velocity and positive acceleration, your <u>speed increases.</u>
If you have positive velocity and negative acceleration, your speed decreases.
Now you get the idea, we will see that the correct option is graph 1.
We know that the car moves towards the right (let's define this as "the car has positive velocity") and we also know that te car is slowing down constantly (thus the acceleration needs to be negative and constant).
By looking at the graphs, the only one with these properties is graph 1.
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The final magnification will be 400-fold or 400 times the original size of the object.
For magnifying smaller objects, a compound microscope is used.
A compound microscope consists of an objective and an eyepiece, whose diagram is shown in the adjoining image.
The lens near the object is called an objective and the other one is the eyepiece.
Let the magnification of the objective be m1
Let the magnification of the eyepiece be m2
The final magnification by the microscope, M, will be
M = m1 x m2
Putting the values in the above equation
M = 40 x 10
M= 400
Thus, the final magnification will be 400-fold or 400 times the original size of the object.
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