A book that is on the shelf contains 187 Joules of potential energy and has a mass of 3 kg? How high is the shelf where the book is on?

v 154.9= 0.9 length length s little over 154.9cm

where are the vectors ?

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19

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.