Adults spend about 70 percent of their waking time communicating, of which percent is spent listening.

45 percent listening i took the test

Explanation:

Adults spend about 70 percent of their waking time communicating (Adler et al., 2001). Of this, on average 45 percent of communication time is spent listening, 30 percent speaking, 16 percent reading, and 9 percent writing. In the work context, for the average employee these figures have been calculated as 55 percent listening, 23 percent speaking, 13.3 percent reading, and 8.4 percent writing; but for managers the listening figure increases to 63 percent (Woven and Coakley, 1996).

answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases . this process does not change the mass number.

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as -decay. in this the mass number remains same.

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.

answer: option c.

explanation: