Which of the following activities is most likely to result in nutrient pollution? a. cutting down trees b. pouring motor oil down the drain c. excess fertilizer use d. none of the above select the best answer from the choices provided a b c d

Excess fertilizer use results in nutrient pollution by effecting the nutrition values of the plants we eat.

Cutting down trees more likely to result in air pollution by an increase in greenhouse gases.

Pouring oil in drain creates water pollution which is not a nutrient source.

This is what a calorimeter is used for simpler ex, to measure calories in food.

Distance covered = speed x timethe distance traveled going against the stream = distance traveled with the stream.therefore it is the speed and the time that are the variables.as he travels the same distance both ways, speed x time is the same for each way.going upstream his speed is 4 kph; going downstream his speed is 6 kph.therefore we have two simultaneous equations: time upstream x 4 = time downstream x 6time upstream + time downstream = 60 minutestherefore we have the equation: time upstream = 6/10 hour, time downstream therefore = 4/10 hour.distance traveled at 4km/hr in 6/10 hour = 24/10 = 2.4km.check: distance traveled at 6km/hr in 4/10 hour = 24/10 = 2.4km.