an object is placed 50cm infront of a concave mirror of radius of curvature 60cm. calculate the position of the image formed

a.   mass number from atomic number

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this

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.