Atwood’s machine, in which two containersare connected by a cord (of negligible mass) passing over africtionless pulley (also of negligible mass). At time t = 0, container1 has mass 1.30 kg and container 2 has mass 2.80 kg, but container 1is losing mass (through a leak) at the constant rate of 0.200 kg/s. Atwhat rate is the acceleration magnitude of the containers changingat (a) t  0 and (b) t = 3.00 s? (c) When does the acceleration reachits maximum value?

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.