Answer: softer
The sound waves become weaker, so to an observer this wave is lighter sound.
Answer:
Kinetic energy, E = 133.38 Joules
Explanation:
It is given that,
Mass of the model airplane, m = 3 kg
Velocity component, v₁ = 5 m/s (due east)
Velocity component, v₂ = 8 m/s (due north)
Let v is the resultant of velocity. It is given by :


Let E is the kinetic energy of the plane. It is given by :


E = 133.38 Joules
So, the kinetic energy of the plane is 133.38 Joules. Hence, this is the required solution.
I believe the percentage is between 15-20%. Stress is a well known factor that affects the performance of people.
Answer:
C
Explanation:
a parallel circuit because there is more than one path