The diagram represents an energy change. waste energy
energy input
useful energy
output
Copy and complete the following two word equations for this energy change:
waste energy =
b efficiency=

Waste energy = Energy Input - Useful Energy Output (Principle of Energy Conservation)

Efficiency = Useful Energy Output/Energy Input (Definition of Energy Efficiency)

Explanation:

The waste energy is the difference between energy input and useful energy output. Then, the word equation is:

Waste energy = Energy Input - Useful Energy Output (Principle of Energy Conservation)

The efficiency, measured in percentage, is the ratio of the useful energy output to the energy input and multiplied by 100. Then, the word equation is:

Efficiency = Useful Energy Output/Energy Input (Definition of Energy Efficiency)

russian is not my first language, so i'm afraid i can't write out an answer in russian, but hopefully you can find a way to do so. here's my best translation of the problem: you're given a plot of a particle's position in one-dimensional space over time, and you're asked to find either the total distance traveled by the particle after 6 seconds had elapsed, or the total displacement of the particle after 6 seconds.

if you want the total distance traveled, you would first need to determine the particle's velocity as a function of time, then integrate that over the 6-second interval. we know the position function is quadratic with roots at 0 and 6, so we have

where is unknown. because the position is parabolic, there is symmetry about the midpoint at , and we know that

so that the position function is

which means the velocity is

then the total distance traveled is

so the total distance traveled is 20 m.

on the other hand, if you want to find displacement: the particle starts at and ends at , so its displacement is 0.

answerscientific theory;