A wave loses energy as it moves through a medium.
I think 30 as that’s usually average speed
Answer:
a
Explanation:
the plane is not going up and the rest are true
Answer:
21 hours
Explanation:
well 30 x 20 = 600 than 21 = 630
Answer:
Answer:
72.936 Joule
Explanation:
Mechanical Energy = Potential Energy + Kinetic Energy
Kinetic Energy = (1/2) x m x V² = (1/2) x 1.8 x 4.8² = 20.736 J
Potential Energy = m x g x h = 1.8 x 10 x 2.9 = 52.2 J
Total Mechanical Energy = 20.736 + 52.2 = 72.936 Joule
Explanation: