what is the maximum current imax in a straight superconducting niobium wire of radius 1.5 mm ? keep in mind that the superconductivity of a niobium wire is destroyed if the magnetic field at the surface of the wire reaches or exceeds 0.10 t .

the best answer for these questions would be:

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.

the correct answer is "inertia"