An airplane flies six hundred miles to the south; then, after landing and refueling, it flies due north for three hundred miles. what is the airplane's displacement? (remember, displacement is a vector, so direction needs to be indicated in your answer).

d =

answer; round wood logs, building materials like (plywood),also pulp and paper products;

b.

developed countries have tended to improve the environment, while developing countries have tended to damage it.

true. earthquakes are felt whenever there is a slip around a fault in the rocks below the earth. this reorientation of faults create sesmic waves and is known as earthquake, the severity of which is measured in richter scale. these are more prominent in hilly regions as the rocks usually form faults to balance the pressures on it.

heat from the core of the earth causes convection currents to occur in the mantle. these currents slowly move the crust around.