Protons have a positive charge true or false

Determine the mass of fuel required for the expected energy consumption in the united states for the next ten years. energy use per person per year in the united states = 3.5 x 1011joules base calculations on current population of 310,000,000.

Which is the layer underground where all empty spaces are filled with a combination of air and water ?

Express the following number in scientific notation. 0.026890 =