We wish to measure the voltage across four 12 V batteries wired in series to make a 48 V battery in a solar photovoltaic system as it charges and discharges with time. The voltage produced by a battery does not stay constant but will increase as it charges and decrease as it discharges. If we have a data logger that can only measure voltages between 0V and 10V, design a circuit that allows us to monitor the battery voltage as it changes between 45V and 55V.

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?

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.

Why does the liquid rise up through the dip tube when the valve is open