3 Conservation of energy

Four laboratory centrifuges complete separate operating cycles. The table gives the energy supplied and the energy dissipated during each cycle.

Centrifuge	Total energy input in $J\mathrm{J}$	Dissipated energy in $J\mathrm{J}$
J	700	210
K	1200	300
L	900	180
M	600	90

Which of the centrifuges is the least efficient?

[1]

centrifuge L

centrifuge K

centrifuge J

centrifuge M

Four laboratory centrifuges complete separate operating cycles. The table gives the energy supplied and the energy dissipated during each cycle.

Centrifuge	Total energy input in $J\mathrm{J}$	Dissipated energy in $J\mathrm{J}$
J	700	210
K	1200	300
L	900	180
M	600	90

Which of the centrifuges is the least efficient?

[1]

centrifuge L

centrifuge K

centrifuge J

centrifuge M

3 Conservation of energy Questions