What term defines the specific amount of time required for half of a radioactive substance to become stable?

a. half-life

b. decay phase

c. decay period

d. a gamma second

Magnetic field lines, generated by a long straight wire carrying a current, are circles concentric with the wire and lie in planes perpendicular to the wire. a. True b. False

Ionic compounds are named using numerical prefixes. true or false

Which is true about refraction from one material into a second material with a greater index of refraction when the incident angle is, say, 30º?

A jogger whose mass is 65 kg is moving at a velocity of 4 m/s. What is the jogger's kinetic energy?

Functionalists argue that the incest taboo is a nearly universal norm because it

Why does it hurt your hands when you carry heavy shopping in carrier bags?

Why did scientists choose carbon as a base for the atomic mass unit? Which isotope of carbon did they use?

What organelle is found in all animal cells and some plant cells

Basic of Archimedes's principle of how fluid can make body to float and sink.

A bullet is accelerated down the barrel of a gun by hot gases produced in the combustion of gun powder. What is the average force (in N) exerted on a 0.0500 kg bullet to accelerate it to a speed of 625 m/s in a time of 1.10 ms (milliseconds)