Activity Look at the lines in the image, and answer the questions that follow.
Line 1
Line 2 OO
Line 3 O
Part A
Reading from left to right, describe the spacing between the dots in lines 1, 2, and 3.
B T U X X
Font Sizes
A A-E EIE 3

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.

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle

answer a fan shaped mass of sediment deposited at the base of a mountain front do to an abrupt change in stream gradient;