1) select the "chain reaction" tab at the top. experiment with changing the settings and shooting the neutron gun and watch what happens. then answer the questions below.2) click the ‘reset all’ button and then set the initial number of u-235 nuclei to 100 and u-238 to 0. what happens when you fire the neutron gun? 3) explain what makes this a "chain reaction".4) click ‘reset’ and then set the initial number of u-238 nuclei to 100 and u-235 to 0. explain what happens when you fire the gun. does this cause a chain reaction? try multiple times to start a chain reaction with the u-238. explain why this happens.

the dna of humans and mice is almost 92% similar. this similarity indicates that . mice have a tail, while humans have a tailbone. the tailbone is a structure in humans.yes it's true.

the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.

rising temperatures because when water vapor in the air is cooled, it condenses. it turns back into a liquid and attaches to dust particles in the air. these very small water droplets group together to form clouds