an engineering team designs a rocket that flies faster and requires less fuel than other rockets. however, the rocket explodes the first time it is launched. which step of the engineering process would have shown that there was a potential problem?

a.
evaluate the results.

b.
make a plan.

c.
know the background.

d.
do the work.

Compare and contrast physical changes with chemical changes.

If 15 drops of ethanol from a medicine dropper weigh 0.60g, how many drops does it takes from a dropper to dispense 1.0ml of ethanol? density of ethanol is ethanol is 0.80g/ml.

Sugar is made up of clear, colorless crystals that dissolve easily in water, but the crystals and their solution do not conduct electricity. which statement describes sugar? it is made up of atoms that are held together by metallic bonds. it is made up of atoms that are held together by covalent bonds, it is made up of atoms that are held together by weak ionic bonds. it is made up of atoms that are held together by strong ionic bonds.