Describe the relationship between field of view size and total magnification
How does this affect microscope use?
What will be an ideal response?
As the total magnification of a microscope increases, the size of the field of view
decreases in proportion to the change in magnification. If an object occupies the entire
field of view at 100X, then only one fourth of the object will be visible at 400X.
Microscope users should be aware of this relationship. Students frequently get
distressed when their object "disappears"; in reality, they are looking at a small part
of the object at higher magnification.
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The total volume of the oceans on Earth is 1.35 x 1018 m3. What are the masses of the following elements in the Ocean in units of kg?
a. Oxygen, O, for which the concentration in the seawater is 857,000 ppm b. Hydrogen, H, for which the concentration in the seawater is 108,000 ppm c. Sodium, Na, for which the concentration in the seawater is 10,500 ppm What will be an ideal response?
When using a fire extinguisher, what word can be used to remember what to do?
A) LEVER B) PASS C) RED D) FIRE
Technician A says that Hall-effect throttle position sensors (TPS) are configurable to either digital or analog input circuits as required by the application. Technician B says that a disadvantage of Hall-effect TPS is that the contact wiper wears at an accelerated rate. Who is correct?
A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B
Roots grow both in length and in diameter
Indicate whether the statement is true or false