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  1. ...proportionately more muscle (in terms of that cross-sectional area) that they can use to lift heavy things . Conversely, humans are proportionately more massive, and have less...

  2. ... just a constant, 9.8ms^-2. No matter how heavy the object is, the acceleration is still the same...case, we assume that air resistance only depends on two things : the surface area of an object and the mass of the object...

  3. ...pollution. 3. Rubbish produces bad smell. 4. Heavy traffice produce much smoke. 5. Power plants... are full of rubbish and give out bad smell. Things we ought to do to stop air pollution( Solutions...

  4. ...discharge a variety of pollutants in their wastewater including heavy metals, resin pellets, organic toxins, oils, ...