What kind of telescopes are refracting, reflecting, and catadiaoptic telescopes?
What will be an ideal response?
optical
Physics & Space Science
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The Sun will exhaust its nuclear fuel in about ________
A) 5 million years B) 50 billion years C) 5 billion years D) 5000 AD
Physics & Space Science
A stonecutter's chisel has an edge area of 0.7 cm2 . If the chisel is struck with a force of 42 N, what is the pressure exerted on the stone?
a. 600 N/m2 b. 30 000 N/m2 c. 300 000 N/m2 d. 600 000 N/m2 e. 6 000 N/m2
Physics & Space Science
A hydraulic jack is used to lift objects such as automobiles. If the input force is 200 N over a distance of 1 meter, the output force over a distance of 0.1 meter is ideally
A) 200 N. B) 500 N. C) 1000 N. D) 2000 N. E) none of the above
Physics & Space Science
The Tully-Fisher relation uses the ________ of the spiral to find its luminosity
Fill in the blank(s) with correct word
Physics & Space Science