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If the work output of a simple machine is 40 J and the work input is 50 J, the percent efficiency is %.
A. 5/4
B. 10
C. 80
D. 90

When applying kirchhoff's rules, one of the essential steps is to mark each resistor with plus and minus signs to label how the electric potential changes from one end of the resistor to the other. the circuit in the drawing contains four resistors, each marked with the associated plus and minus signs. however, one resistor is marked incorrectly. which one is it?

Wavelength,frequency,and energy are related.what happens to a wave as it’s wavelength gets shorter?

See the attachment and solve question 5th