What is the ratio uncertainty of the velocities (∆v/v) of (a) an electron (b) a proton confined to a one dimensional box of length 1.8 nm?

u=13

v=30

s/t=u+1\2at

=13+431/2

=13+265.5

=278.5

force tends to be low and long diustance masses are high

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1.            c. is smaller

2.            d) concrete operational

3.            b) interaction with the environment – the children interact with their environment can them learn more.

4.            a) parents who reason openly with children can limit a child’s cognitive ability.