input question: I read this background article the other day: Something that is elastic can return to its original shape after being stretched or compressed. This property is called elasticity . As you stretch or compress an elastic material like a bungee cord, it resists the change in shape. It exerts a counter force in the opposite direction. This force is called elastic force . The farther the material is stretched or compressed, the greater the elastic force becomes. As soon as the stretching or compressing force is released, elastic force causes the material to spring back to its original shape. You can watch a demonstration of elastic force at this URL: I am facing a new situation today: Michael is planning on playing a prank on his older brother. He is going to take a bungee cord and stretch it and then release it so that it hits his older brother as he is sleeping. He is deciding whether to stretch the cord only partially or completely before releasing it. Using the knowledge I acquired from the background article, how should I answer correctly the following question regarding my new situation: Will stretching the bungee cord partially or completely result in more force when it's released????
output answer: completely

input question: I read this background article the other day: As time passes, the number of HIV copies keeps increasing, while the number of helper T cells keeps decreasing. The graph in Figure below shows how the number of T cells typically declines over a period of many years following the initial HIV infection. As the number of T cells decreases, so does the ability of the immune system to defend the body. As a result, an HIV-infected person develops frequent infections. Medicines can slow down the virus but not get rid of it, so there is no cure at present for HIV infections or AIDS. There also is no vaccine to immunize people against HIV infection, but scientists are working to develop one. I am facing a new situation today: A doctor tested two people for HIV. Tom had the virus in his blood, while Nick didn't have HIV, he was healthy. Tom has apparently had the virus for 20 years. Using the knowledge I acquired from the background article, how should I answer correctly the following question regarding my new situation: Which person developed frequent infections????
output answer: Tom

input question: I read this background article the other day: Thermoclines, or sudden changes in temperature. Where the air temperature is higher than the water temperature, shallow water may be warmed by the air and the sunlight but deeper water remains cold resulting in a lowering of temperature as the diver descends. This temperature change may be concentrated over a small vertical interval, when it is called a thermocline.[3][4] Where cold, fresh water enters a warmer sea the fresh water may float over the denser saline water, so the temperature rises as the diver descends.[3] In lakes exposed to geothermal activity, the temperature of the deeper water may be warmer than the surface water. This will usually lead to convection currents.[3] I am facing a new situation today: Deep lake presents geothermal activity, while Shallow lake has mixing of saline water with fresh water. Deep lake had more instances of divers having problems because of thermoclines. Using the knowledge I acquired from the background article, how should I answer correctly the following question regarding my new situation: Which lake has colder water the bottom????
output answer: Shallow

input question: I read this background article the other day: Sodium and potassium are two of the most important elements in living things. They are present mainly as positively charged ions dissolved in water. The sodium-potassium pump moves sodium ions (Na + ) out of the cell and potassium ions (K + ) into the cell. In both cases, the ions are moving from an area of lower to higher concentration. Energy in ATP is needed for this "uphill" process. Figure below shows how this pump works. Trace these steps from left to right in the figure I am facing a new situation today: Ben and Andy studied minerals and micro-nutrients. Ben studied more about magnesium, zinc and molybdenum, while his buddy Andy studied about sodium and potassium. Using the knowledge I acquired from the background article, how should I answer correctly the following question regarding my new situation: Which person studied more about moving sodium ions (Na + ) out of the cell????
output answer:
Andy