2) if you were carefully watching this planet during the entire orbit, would the speed of the
planet be increasing, decreasing, or staying the same? how do you know?

fgravity=10x10=100n case 1

fgravity=30x20=600n case 2

6 times more

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.

conservation of mass

mass before something happens = mass afterwards

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.