A group of engineers have launched a space probe from earth that will land on the surface of Mars. how will the force of gravity from mars affect the space probe? A) the force of gravity from Mars will not pull on the space probe until it reaches the planets surface.

B) the force of gravity from Mars will stop pulling on the space probe when it reaches the planet

C) the force of gravity from Mars will pull more strongly on the space probe as it gets closer to Mars.

D) the force of gravity from Mars will pull on the space probe the same amount no matter how far away it is​

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.

connect the batteries in series and hope

the doppler effect is used by weather forecasters to measure 

moving clouds