Asap

q1 the earth's surface is affected by the sun in many ways. the diagram below shows the earth and sun's light rays during a certain time of the year. which of the following best describes what people are experiencing at location x on earth? a. the first days of summer b. the season with the longest days c. the first days of fall d. the coldest season of the year

q2 people often place ice into a warm liquid to make their drink colder. which statement best explains how ice makes a liquid colder?

a.
the ice pushes cool air into the liquid’s solid container.
b.
coldness flows from the colder ice into the warm liquid.
c.
heat flows from the warm liquid into the colder ice.
d.
the ice changes the chemical properties of the warm liquid.

q1 ... No diagram.

q2 ... c

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.

no. dot product   =0 when vecs at right angles