When testing the effect of caffeine on cardiac rate, Valerie used water fleas as her test subject. She placed 5 water fleas ia beaker #1 with 50 mL normal water,
then placed 5 water fleas in beaker #2 with 1 mL coffee and 50 mL water, 5 water
fleas in a petri dish with 5 mL coffee and 50 mL water, and 5 water fleas 10 mL of
coffee and 50 mL of water. In the experiment above, what is the purpose of
beaker #1? *

Determine the mass of fuel required for the expected energy consumption in the united states for the next ten years. energy use per person per year in the united states = 3.5 x 1011joules base calculations on current population of 310,000,000.

For a patient with the following pes statement and interventions, which would be the most appropriate monitoring and evaluating data? pes statement: inadequate calcium intake related to food and nutrition related knowledge deficit as evidenced by statements that the only dietary source of calcium is milk and she believes that she is lactose intolerant. patient’s nutrition prescription is for a diet providing 1200 mg calcium per day. patient was provided with in-depth nutrition education on alternative dietary and supplement sources of calcium. a. calcium intake (at subsequent visit) b. knowledge assessment by asking patient to identify food sources from menus and shopping list (at the end of the current visit) c. serum calcium (at next visit) d. both a and b e. both a and c

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.