A roller coaster starts off with an initial speed of 6.0 m/s and ends with a speed of 70 m/s over 4 seconds. What's the acceleration?

Explanation:

Formula for finding acceleration=

a,acceleration -?

v,final velocity - 70 m)s

u,initial velocity - 6.0 m/s

t,time - 4 seconds

the temperature in kelvin of 2.0 dm3 of an ideal gas is doubled and its pressure is increased by a factor of four. what is the final volume of the gas

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.