Answer:
419.25 lbs
Explanation:
Let iron density be 491.5 lb/ft3
and aluminum density be 169 lb/ft3
We can calculate the mass of iron that displaces 1.3ft3
Also the mass of aluminum that displaces 1.3 ft3
So by using aluminum, the airplane can save
638.95 - 219.7 = 419.25 lbs of weight
It is the property of sound that most determines pitch. The generally accepted standard range of audible frequencies for humans is 20 to 20,000 Hz, although the range of frequencies individuals hear is greatly influenced by environmental factors.
Answer:
Everything in the Universe is made up of matter and energy. Matter is anything that has mass and occupies space. ... Energy is the ability to cause change or do work. Some forms of energy include light, heat, chemical, nuclear, electrical energy and mechanical energy.
Explanation:
Answer:
They are too busy doing their own work