A positive lens of focal length 40 cm is placed 20 cm
A positive lens of focal length 40 cm is placed 20 cm behind a negative lens of focal length -80 cm. An object is placed 240 cm in front of the negative lens. The final image distance relative to the positive lens is:
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an object 25 cm from a convex mirror is observed to produce an image 136 cm behind the mirror what is the focal length
a blow-dryer and a vacuum cleaner each operate with a voltage of120 v the current rating of the blow-dryer is 12 a and
two parallel mirrors are a distance d apart an object is placed 10 inch in front of the right-hand mirror after 5
a model rocket fired vertically from the ground ascends with avertical acceleration of 36 ms2 for 50 s its fuel is then
a positive lens of focal length 40 cm is placed 20 cm behind a negative lens of focal length -80 cm an object is placed
a fountain designed to spray a column of water 14 m into the air has a 3 cm diameter nozzle at ground level the water
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accrual basis accountingoasis health care inc is owned and operated by dr george hancock the sole stockholderduring
a canoeist attempts to paddle a canoe due east directly across a river unfortunately there is a current flowing south
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