Determine the couple generated by the motor rotating a disk when the regular operating speed of 15 rev/min is achieved in a single revolution. The disk has a radius of 4 cm and a mass of 10 kg.

whichever one it is, it's definitely not one that you included on the list you provided.

a straight line sloped

t = 1/400 h   ⇔ 0.0025 h ⇔ 9s ⇔ 0.15 m

any of the answers are correct.

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.