A 771.0-kg copper bar is melted in a smelter. The initial temperature of the copper is 300.0 K. How much heat must the smelter p
1 answer:
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Answer:
the answer is C i didnt mean to put b lol
Explanation:
Answer:
4.69 s
Explanation:
u = Initial velocity = 30 m/s
= Angle of launch =
g = Acceleration due to gravity =
Time taken by the projectile to land is given by
The time the projectile is in the air before it contacts the ground again is 4.69 s.