In a chromatography experiment, spot A traveled further than spot B. What does this tell us?

How much energy moves onto the next level, in an energy pyramid

Which of the following is an example of how telecommunication devices people do their jobs? a.) a security guard checks the time using a digital watch. b.) a banker does some quick math using a solar calculator. c.) a nurse uses a digital thermometer to take a patient’s temperature. d.) a construction worker reports in to his office using a cell phone.

Calculate the temperature rise when 0.2g of propane is used to heat 400cm cubed of water.