What is the missing entity labeled "a" in the following formula, in order for the formula to represent a fusion reaction? (a) 3h (b) 4he (c) 2h (d) 3he or (e) light energy 2h + "a"→ 4he + n + energy, where n is a neutron and he is helium be sure to explain your answer.

:calculate the sum of the interior angles of a 13-sided polygon.

There are 4 red balls, 6 white balls, and 3 green balls in a bag. if one ball is drawn from the bag at random, what is the probability that it is not white?

Why have the countries of the region had difficulty establishing democratic governments in recent years? choose all answers that are correct b is also correct i need to know if theres any morecommunists have overtaken the countries of the caucasus region. the soviets established national borders in the region without considering the location of ethnic groups. fighting continues between armenia and azerbaijan over the nagorno-karabakh region. civil war between communists and islamic groups in tajikistan resulted in thousands of deaths and refugees are forced to flee. in a test!