Astudent pushes against a tree with a force of 10 newtons (n). the tree does not move. what is the amount of force exerted by the tree on the student?
1) 0 n
2) 5 n
3) 10 n
4) 20 n

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.

the sun creates it's own light, also gives light and life to bunch of stuff like plants,animals,humans etc.photosyntesis is the process of making food which needs sun,water,nutrients etc.