Me i need to pass

a machine has an efficiency of 80%. how much work must be done on the machine so to make it do 50,000 j of output work?

--a--12,500 j
--b--40,000 j
--c--62,500 j
--d--90,000 j

c. 62,500 J

Explanation: The ratio of output work to input work expressed as a percent is called as efficiency of the machine.

Given : Efficiency = 80 %

Output work or work done by the machine = 50000 J

Input work or work done on the machine = ?

ionic bonds are two oppositely charged ions that attract. a sodium ion has a 1 positive charge; a chloride ion has a 1 negative charge. sodium and chloride have oppostive charged ions that attract which forms an ionic bond. a chemical bond formed when two atoms share electrons is called

i think its white blood cells

i hope this