What Diopter takes an object at 47. cm and forms an upright image 23. cm from the lens?
A) +2.2 D
B) -0.022 D
C) -2.2 D
D) 2.2 × 102 D
E) +0.022 D
C
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Compound Microscope: A compound microscope has an objective with a focal length of 3.00 mm and an eyepiece of focal length 6.00 cm. It is adjusted for minimum eyestrain for persons with a near point of 25 cm. If the two lenses are separated by 40.0 cm, what is the total overall magnification?
A. 28 B. 56 C. 470 D. 550 E. 2200
Thin Lenses: A convex lens has focal length f. If an object is placed at a distance of 2f from the lens on the principal axis, the image is located at a distance from the lens
A. of 2f. B. between f and 2f. C. of f. D. between the lens and f. E. of infinity.
The tires of a car support the weight of a stationary car. If one tire has a slow leak, the air pressure within the tire will _______ with time, the surface area between the tire and the road will ________ in time, and the net force the tire exerts
on the road will ___________ in time. A) decrease, increase, remain constant B) decrease, increase, decrease C) decrease, decrease, decrease D) increase, increase, increase E) decrease, increase, increase
R-09 insulation provides more resistance to the flow of heat than R-12 insulation
What will be an ideal response?