Amodel airplane exerts 0.45 newton’s over a distance of 250 meters. how much work was the plane doing?

Current 1 of 8.4 a runs for 240 seconds and then stops. current 2 is 10.5 a. how long does current 2 have to un to deliver the same amount of charge as current 1? 88.28 192 s 2016 s 21,000 s

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

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