Which best describes how the diagram illustrates both laws of thermodynamics? first law: high-temperature steam flows to an area of lower temperature in the turbines. second law: thermal energy is used to do work on the turbines. first law: thermal energy is used to do work on the turbines. second law: high-temperature steam flows to an area of lower temperatures in the turbines. first law: some thermal energy is lost to the surrounding environment as it travels through the system. second law: kinetic energy is used to turn an electrical generator. first law: kinetic energy is used to turn an electrical generator. second law: some thermal energy is lost to the surrounding environment as it travels through the system.

Researchers conducted an experiment to identify the effects of three different hand sanitizers on the growth of bacteria. the researchers grew one type of bacteria in twenty-four identical covered petri dishes. then, they opened eighteen petri dishes and applied the three hand sanitizers to six petri dishes each. they left the remaining six petri dishes closed as a control group. when the researchers measured the growth of bacteria two days later, the six dishes that had no hand sanitizer showed the least amount of bacterial growth. the researchers concluded that not using any hand sanitizer would lead to the least bacterial growth. which statement best explains why the researchers’ conclusion was not justified? the experiment tested too many variables. the control group was not treated the same as the experimental group. the sample size of twenty-four petri dishes is not large enough. the single type of bacteria is not adequate to make any conclusions.