If you start with 100 grams of radioactive carbon in 50 grams remain after 5730 years what is the half-life of the isotope

Aflashlight produces light using energy from the batteries. in which order does the energy change form? a. from chemical to electric to light energy b. from electric to light to chemical energy c. from electric to chemical to light energy d. from light to electric to chemical energy

What must be true for natural selection to heppen

Which statement describes john tuzo wilson’s contribution to the theory of plate tectonics?