There is a class of solids called "quasicrystals" that were big news in the 1980's. these showed up with an x-ray diffraction pattern with 5 fold symmetry

–why was this a surprise?

–what would the mechanical properties of such a material be?

–how was the quandary resolved?

Which of the following explains why it took so long for the public to accept the negative health effects of smoking? a)people were waiting for counter reasons, and those were presented.b)scientists had not completely finalized their results, which took 30 years.c)cigarettes were cheaply available and media channels were very inefficient.d)cigarette manufacturers were trying hard to bring an alternative into the market

Which one of the following terms is used to indicate the natural tendency of an object to remain at rest or in motion at a constant speed along a straight line? velocity acceleration equilibrium force inertia

Acar is traveling 35 mph on a smooth surface . if a balanced force is applied to the car what happens?