8. using a ramp 6 meters long, workers apply an effort force of 1250 n to move a
2000 n (f.) crate onto a platform 2 meters high. what is the efficiency of the
ramp? (hint: calculate win & wout, then efficiency

A6.0-μf air-filled capacitor is connected across a 100-v voltage source. after the source fully charges the capacitor, the capacitor is immersed in transformer oil (of dielectric constant 4.5). how much additional charge flows from the voltage source, which remained connected during the process?