An inventor wants you to finance construction of a machine that will do work by running a continuous chain through a pulley, letting weights attached every so often fall down do the work
The machine should run forever, because the weights will fall again and again as the chain goes round the pulley. You both can sell energy so cheaply, you'd make millions. Should you invest $100,000? Why or why not?
You should not invest. This is what is known as a perpetual motion machine. The
second law of thermodynamics says that this cannot work as advertised.
You might also like to view...
Neutron stars and black holes are formed by:
A) the star formation process. B) mass transfer in binary star systems. C) novae. D) type I supernovae. E) type II supernovae.
How does metal content vary between Population I and II? Why?
What will be an ideal response?
An old bone sample contains 321. grams of carbon and its activity is 947. decays/min. (5730. yr half life of Carbon-14)
(a) How many thousand years old is the sample? (b) What will be the activity of the sample 2000. yrs from now?
What mass would have to be compressed to a radius of 1.0 × 10-15 m (the order of magnitude of the radius of an atomic nucleus) in order for it to become a black hole? (G = 6.67 × 10-11 N ? m2/kg2, c = 3.0 × 108 m/s)
A) 1.1 × 10-6 kg B) 4.1 × 10-8 kg C) 2.2 × 103 kg D) 6.7 × 1011 kg E) 8.3 × 1015 kg