Energy decreases as it moves uptrophic levels because energy is lost as metabolic heat when the organisms from one trophic level are consumed by organisms from the next level.Trophic level transfer efficiency (TLTE) measures the amount of energy that is transferred between trophic levels.
Answer:

Explanation:
ΣF=ma
The two forces at play are the force applied and the force due to friction. As they are opposing forces set the direction being pushed as the positive in the x direction. the equation you come out with is 60 - 15=(15)A (we know mass to be 15kg). Solve for 3 m/s^2.
Velocity = displacement / time
v = 400 / 2
v = 200 km/h
In short, Your Answer would be 200 km/h
Hope this helps!
Answer:

Explanation:
Mass of moon = m
Mass of planet =M
We know that gravitational force given as



Given that force is zero so
F=F'




