An object moving with uniform acceleration has a velocity of 11.0 cm/s in the positive x-direction when its x-coordinate is 2.79 cm. if its x-coordinate 2.55s later is -5.00cm, what is its acceleration?

Acceleration will be    

Explanation:

We have given speed of the moving object u = 11 cm /sec

As the object move from +2.79 x -coordinate to -5 x- coordinate

So total distance = 5+2.79 = 7.79 cm

Time is given as t = 2.55 sec

We have to find the acceleration

From second equation of motion we know that

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.

answer; equivalent to a one(1) horsepower motor;