Another machine uses aninput force of 200 newtons to produce an output force of 80 newtons

If you mix chlorine lithium and nickel together which two elements would be the most reactive

What is the type of the reaction below? bacl2 + h2so4 → 2 hci + baso4 double replacement synthesis single replacement decomposition

Looking at this barometer, is the air pressure high or low? what type of weather would you expect? high, bad low, bad high, good low, good