Light gathering power and resolving power both depend on what characteristic of a telescope?
a. number of lenses
b. magnification
c. focal length
d. location
e. diameter
e
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In a certain one-lane road there are no entrances or exits. As the road passes through open country and populated areas, the speed limit changes. Assume that cars travel at the posted speed limit
In the open road, where the speed limit is 55 mph, the cars are spaced so there are 51 cars per mile. If the flow of cars is steady, how many cars per mile are there in a stretch of road where the speed limit is 40 mph? A) 56 cars/mile B) 60 cars/mile C) 66 cars/mile D) 70 cars/mile E) 76 cars/mile
Copernicus was the first person to suggest a Sun-centered solar system.
What will be an ideal response?
A roller coaster car is on a track that forms a circular loop in the vertical plane. If the car is to just maintain contact with track at the top of the loop, what is the minimum value for its centripetal acceleration at this point?
A) g downward B) 0.5g downward C) 2g downward D) g upward E) 2g upward
Like our own, the magnetic field of Venus has been seen to reverse polarity
Indicate whether the statement is true or false