A car accelerates from 1.5 to 18 m/sec in 9.6 seconds. Calculate its acceleration. m/s²
During a race, you speed up from 2.2 m/sec to 4 m/sec in 3.2 seconds.
(a) What is your change in speed?
m/sec
(b) What is your acceleration?
m/sec²

it takes about 30 days for it to break down

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.

it is very well related to a lot of things but with my limited knowledge i can confidently say that the answer is space.

hypothesising or postulating