americium-241 has a half-life of 430 years. how much of a 10.0g sample of americium-241 remains after 1720 years?

True or False, Nuclear fusion occurs when two nuclei are combined, while nuclear fission occurs when a nucleus splits into smaller nuclei; in both reactions, a lot of energy is released.

Even the demand for a necessity such as gasoline will respond to a change in price, especially over a longer time horizon. a. TRUE b. FALSE

Animal cells are considered eukaryotic and bacteria cells prokaryotic. This is because - A) animal cells grow at a much slower rate than bacteria cells. B) the cell membrane on an animal cell is much more rigid.

In the first law of thermodynamics, angle E = Q - W, what does Angle E stand for? A. The heat added to the system B. The internal energy of the system C. The work done by the piston D. The change in the internal energy of the system

Which of the following is a variable property for a gas? Select all that apply. A.) Mass B.) Denstiy C.) Volume D.) Shape

Choose all the answers that apply. Which of the following has kinetic energy? rolling ball, moving car, book on a table, spinning top, or a falling tree.

Which of the following statements about the suns feature is true?

Preteins vary widely in structure, whereas nucleic acids have rather uniform structures. How do you account for this major difference?

Convert the pressure 0.840 atm to mm Hg

What is the temperature in Celsius of 308 K?