Question 19 What is an advantage of a nuclear-fission reactor?
А
The nuclear waste generated has a very long half-life.
B
The products of fission reactions are often radioactive isotopes.
С
The power plants are only expensive if they require radiation shielding.
D
A large amount of energy can be produced from a small amount of uranium.

What are the student's observations and inferences before he starts his investigation?

Find the mass of the cone using the triple beam balance. a. 543.0 g b. 542.0 g c. 504.28 g d. 502.8 g select the best answer from the choices provided a b c d

Which of the following statements is correct in hour our immune system responds to a potential pathogen? a. the adapted immune system will call on the innate immune system to destroy the pathogen. b. b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c. the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. d. the t-cells in the adapted immune systems are the first to recognize the pathogen vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a. antigen, antibody b. antibody, antigen c. antibody, antibiotic d. antibiotic, antibody