13. A plane flying above the ground has 60,000 joules of kinetic energy and 6,000 joules of
gravitational potential energy. How much
mechanical energy does the plane have?
A. 10 J
B. 54,000 J
C. 66,000 J
D. 360,000,000 J

resonant frequency

the rearrangement of particles in a physical change. hope 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.