Two blocks, each of mass 3.50 kg, are fastened to the top of an elevator, as shown above. The elevator's acceleration is 1.60 m/s/s. Jupward.
(a) Which rope has more tension, the top rope or the bottom rope? Explain without calculations.

Give an example in which the electrical energy changes to light energy

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up

The radioactive isotope of lead, pb-209, decays at a rate proportional to the amount present at time t and has a half-life of 3.3 hours. if 1 gram of this isotope is present initially, how long will it take for 80% of the lead to decay? (round your answer to two decimal places.)