A human heart beats an average of 80 beats per minute. How many beats is this in an hour? Express your answer in scientific notation. (remember the steps for unit conversion)
60 minutes = 1 hour

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Positrons are spontaneously emitted from the nuclei of

Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excess electrons is typical. what is the magnitude of the electric force on a protein with this charge in a 1600n/c electric field? write in two significant numbers, and also in newton

How many meters will a car travel if its speed is 45 m/s in an interval of 11 seconds? question 2 options: a) 450 meters b) 495 meters c) 4.09 meters d) 498 meters