Average velocity can be calculated by dividing displacement over what?
a) change in time
b) change in distance
c) change in density
d) change in mass

We have a colorless transparent liquid. it looks like water. we seperated it into a solid and a liquid by evaporration and condention was this a chemichal or a physical seperation a. chemical seperation b. physical seperation

What is special about a dc circuit ?

Which additional product balances the reaction h2so4 + 2naoh → na2so4 + 2h2o 2oh h2o2 h3o