Aclosed system changes from state 1 to state 2 while 40kj of heat is added and 60kj of work is done by the system. as system is returned to state 1, 20kj of work is done on it. what is the heat transferred during process 2- show workngs

colorectal cancer may also develop from areas of abnormal cells in the lining of the colon or rectum. this area of abnormal cells is called dysplasia and is more commonly seen in people with certain inflammatory diseases of the bowel such as crohn's disease or ulcerative colitis.

uranium fissions/breaks up giving out energy and neutrons

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.