An airplane flies in a horizontal circle of radius 500 m at a speed of 150 m/s. If the plane were to fly in the same 1000 m circle at a speed of 300 m/s, by what factor would its centripetal acceleration change?
a. 0.25
b. 0.50
c. 1.00
d. 2.00
e. 4.00
d
Physics & Space Science
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You see a lightning flash and half a second later hear a loud blast of thunder. How far away did the lightning hit?
a. about a mile b. half a mile c. a tenth of a mile d. none of the above
Physics & Space Science
The process by which small debris condenses into planetesimals is ________
Fill in the blank(s) with correct word
Physics & Space Science
Answer the following statement(s) true (T) or false (F)
1. 
U (uranium) can decay to 
Pb (lead) through an appropriate sequence of alpha and beta decay processes.
Physics & Space Science
How does the seven year cycle of weather compare to the yearly seasonal cycle with regards to the change in the earth’s temperature?
What will be an ideal response?
Physics & Space Science