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A rock is thrown over level ground, with an initial speed of 30m/s, at an angle...

A rock is thrown over level ground, with an initial speed of 30m/s, at an angle of 35degrees above the horizontal. If we ignore air resistance, how long does it spend in the air?

A.

2.1s                 
B.

0.5s              
C.

1.2s
D.

3.5s             
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