Arebuilt bicycle is worth a certain amount because it takes that much labor to produce it. who did marx believe should be compensated for the bicycle?

What are the applications of electromagnetic waves

Which are true about beta reactions? there will be more than one answer. a. it has no change b. it doesn't change the mass of the number c. it has a mass of 0.0005 atoms d. it causes transmutation.

Which system of units is used by only a small number of countries in the world, including the u. s.