Es una fuerza que se manifiesta cuando dos superficies en contacto se deslizan una sobre la otra y siempre se opone al movimiento

Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work)

In general, how long does it take to accomplish a long-term goal? a.a few days to a weekb.a few weeks to a monthc.a few months to a yeard. more than a year

Explain why phospholipid molecules form a bilayer. (3 marks)