Carlota does 2000 J of work on a machine. The machine does 500 J of work. What is the efficiency of the machine?
4%
O 25%
O 75%
O 400%

To find the mass defect for uranium-238 several calculations must be made. which is the calculation that should be made first? assume atomic number for uranium-238 is 92. a. 92(1.0073) x 92(1.0087) = b. 92(1.0073) x 146(1.0087) = c. 146(1.0073) x 238(1.0087) = d. 238(1.0073) x 238(1.0087) =