A girl digests her food and pushes her bike pedal, which powers an electric generator, which powers an electric heater. One of these options
describes the energy transformations in their proper order: *
mechanical, electrical, chemical, heat
chemical, electrical, mechanical, heat
O
chemical, mechanical, electrical, heat
heat, mechanical, chemical, electrical

"the periodic table is arranged in order of atomic number."

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

fe 55.85 g/mol and h2o 18.02 g/mol.