PLEASE HELP

The half life of C-14 is 5730 years. If you start with 2 grams, how much would you have after 17190?

A) 1 gram. B) 2 grams. C) .25 grams. D) .5 grams.

Asher cycles 12 miles in 16 hours. what is his speed?

Two point charges are on the y axis. a 3.90-µc charge is located at y = 1.25 cm, and a -2.4-µc charge is located at y = −1.80 cm. (a) find the total electric potential at the origin. v (b) find the total electric potential at the point whose coordinates are (1.50 cm, 0). v

What is the major limitation to the light microscope?