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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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
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
The process by which small debris condenses into planetesimals is ________
Fill in the blank(s) with correct word
Physics & Space Science
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