If you found a human skeleton that you believe is approximately 20,000 years old, which radioisotope would you use to date it? 235u 238u 14c 40k

Kelly ran electricity though a sample of water using electrolysis. the water changed into two gases, x and y. it was not possible to break down the gases x and y into simpler particles.

Which of the following is an advantage of solar energy?

How does the color of light affect the germination time (amount time a plant takes to develop) of a radish seed?