3. Can you go around a curve with zero acceleration? Explain 4. Can you go around a curve with constant acceleration? Explain

Answers:

No and no.

Explanation:

Acceleration is the increase or decrease in speed, and also what direction something is moving in, to turn is to accelerate, and to change acceleration, so you cannot turn with no acceleration, as to turn is to accelerate, and you cannot turn to go around a curve with a constant acceleration for the same reason, to turn is to accelerate.

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.

photocells convert light energy to electricity