Iron combines with 4.00 g of Copper (11) nitrate to form 6.01 g of Iron (I) nitrate and 0.400 g copper metal. How much iron did it take to convert the Cu(NO3)2?

Electoral current force mechanical advantage if the wheel and axle is 2 n and the output force is 20 n

Sound energy is produced when an object vibrates. examples are 1- a balloon popping2-a whistle3- a waterfall

When you go to ask a qustion there will be a picture of a paper clip looking thing and then it will pop up your files and you click on the imajes and then you up load it

Ke reqd to move from 0 to 50 will be proportional to 50x50 or 2500. this is equal to w.  to change vel from 50 to 150 you need energy prop to 22500 - 2500 = 20,000. this corresponds to 8w.  best answer is a) . work reqd is prop to velocity squared.