A physicist is studying the properties of a pendulum to see if working in a bathyscaphe at the bottom of the Marianas Trench (10,916 meters below sea level!) changes its movement. The initial swing of the pendulum covers a distance of 50cm and each subsequent swing covers 90% of the distance of the previous swing. What is the total distance the pendulum has moved after 20 swings?

+15-35=-20

going in opposite directions

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.

its a circle not a square that's simple silly.

explanation: