Which property of argon makes it useful for potassium-argon dating? It decays into potassium. It is an unstable element. It remains trapped in rock. It is useful only for dating newer rock.

In a load, the load is paralel to the shaft. n a. angular n b. thrust n c radial n d. none of the above

In 1980, alfa romeo introduced the first system to smooth a rough idle caused by ignition and camshaft timing changes.

Awoman stands a distance d from a loud motor that emits sound uniformly in all directions. the sound intensity at her position is an uncomfortable 2.0×10-3 w/m2. at a distance 2.6 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing?