Which type of renewable energy creates electricity by using water currents to spin a turbine? A. Wind
B. Solar
C. Biomass
D. Hydropower

Assume that the variables x and y are inversely related. if k = 18, what is the value of y for each of the following points? be sure and record your data to be used in the following problem.

Why do sodium and neon have vastly different chemical and physical properties despite having similar atomic masses?

Asample of the male sex hormone testosterone, c19h28o2, contains 3.88×10^21 atoms of hydrogen.(a) how many atoms of carbon does it contain? (b) how many molecules of testosterone does it contain? (c) how many moles of testosterone does it contain? (d) what is the mass of this sample in grams?