Aperson takes a trip, driving with a constant speed of 89.5km/h, except for a 22.0−min rest stop. if the person's average speed is 77.8km/h
, how much time is spent on the trip and how far does the person travel?
average speed:

let a body covered d1,d2,d3
distances in respective time intervals t1,t2 and t3.

.

then the average speed of the body is given by

average speed=total distancetotal time=d1+d2+d3t1+t2+t3.

Alinear relationship would look like a straight line on the graph. it could have a positive negative or 0 slope. so it could be a line potentially going in any direction but it must be perfectly straight.

stands for electromotive force and it is measured in volts. despite its name, it is not actually the force in the sense of being a "pushing" or "pulling" (not measured in newtons).an equation that relates emf,  ℰ,  to a battery's terminal voltage, v, current, i, and internal resistance, r, is    ℰ = v + irin this case, the emf can be interpreted as a voltage—a difference in electric potential.i would not say that it would be considered an energy. if emf can be defined as the energy/work per a unit charge from a battery or other electric source, then it is not strictly energy.

The answer is trial 3.

Perpendicular to the wave motion