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Author Question: There are 640 acres in a square mile, and 5280 feet in one mile. What is the length in feet (to the ... (Read 131 times)

Haya94

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on: Jul 29, 2018
There are 640 acres in a square mile, and 5280 feet in one mile. What is the length in feet (to the nearest foot) of the side of a square having an area of one acre?
 
  A) 660 feet
  B) 209 feet
  C) 165 feet
  D) 412 feet
  E) 435 feet

Question 2

A 10.0-kg shell is traveling horizontally to the right at 25.0 m/s relative to the ground when it explodes into two fragments, one of mass 3.00 kg and the other of mass 7.00 kg.
 
  The lighter fragment goes directly forward, and the explosion releases 1.50  103 J of mechanical energy to the fragments. Find the magnitude and direction of the velocity of the heavier fragment relative to the ground just after the explosion. Ignore the effect of any ejected gases.


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jaygar71

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Reply #1 on: Jul 29, 2018
Answer to Question 1

B

Answer to Question 2

13.7 m/s to the right


Haya94

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Reply 2 on: Jul 29, 2018
Gracias!

Liddy

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Reply 3 on: Yesterday
Excellent

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