20.0 grams of element C decays until only 5.00 grams is left. If this occurs over a 50.0 year period, what is the half-life of C?

Which of the following is evidence to the past existence of glaciers?

Which is not part of the definition of a family? two or more related people living together being married or in a partnership a single person living alone choices a and b

What is likely to happen in the long term if the earth continues to absorb more energy than it emits? a. the earth will discontinue recycling energy. b. organisms will begin to compensate for the change by incorporating more energy. c. the overall temperature of the earth will increase. d. the nutrient cycles will happen more frequently. select the best answer from the choices provided a b c d