A 65 kg cyclist on a 15 kg bicycle starts from rest and increases his speed to 12 m/s in 20. s. a) What is the power output?

b) If the cyclist provided an average power of 400 W, what is the efficiency of the bicycle?

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