Given ma=0.50 kg, use the graph to calculate the mass of cart B. Explicitly indicate the principles used in your calculations.

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr

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.

it is b. absorbs thermal energy

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.