Answer:
(a) 0.833 j
(b) 2.497 j
(c) 4.1625 j
(d) 4.995 watt
Explanation:
We have given force F = 5 N
Mass of the body m = 15 kg
So acceleration ![a=\frac{F}{m}=\frac{5}{15}=0.333m/sec^2](https://tex.z-dn.net/?f=a%3D%5Cfrac%7BF%7D%7Bm%7D%3D%5Cfrac%7B5%7D%7B15%7D%3D0.333m%2Fsec%5E2)
As the body starts from rest so initial velocity u = 0 m/sec
(a) From second equation of motion ![s=ut+\frac{1}{2}at^2](https://tex.z-dn.net/?f=s%3Dut%2B%5Cfrac%7B1%7D%7B2%7Dat%5E2)
For t = 1 sec
![s=0\times 1+\frac{1}{2}\times 0.333\times 1^2=0.1666m](https://tex.z-dn.net/?f=s%3D0%5Ctimes%201%2B%5Cfrac%7B1%7D%7B2%7D%5Ctimes%200.333%5Ctimes%201%5E2%3D0.1666m)
We know that work done W =force × distance = 5×0.1666 =0.833 j
(b) For t = 2 sec
![s=0\times 2+\frac{1}{2}\times 0.333\times 2^2=0.666m](https://tex.z-dn.net/?f=s%3D0%5Ctimes%202%2B%5Cfrac%7B1%7D%7B2%7D%5Ctimes%200.333%5Ctimes%202%5E2%3D0.666m)
We know that work done W =force × distance = 5×0.666 =3.33 j
So work done in second second = 3.33-0.833 = 2.497 j
(c) For t = 3 sec
![s=0\times 3+\frac{1}{2}\times 0.333\times 3^2=1.4985m](https://tex.z-dn.net/?f=s%3D0%5Ctimes%203%2B%5Cfrac%7B1%7D%7B2%7D%5Ctimes%200.333%5Ctimes%203%5E2%3D1.4985m)
We know that work done W =force × distance = 5×1.4985 =7.4925 j
So work done in third second = 7.4925 - 2.497 -0.833 = 4.1625 j
(d) Velocity at the end of third second v = u+at
So v = 0+0.333×3 = 0.999 m /sec
We know that power P = force × velocity
So power = 5× 0.999 = 4.995 watt
In zero order reactions the rate of reaction is independent of reactant concentrations. That is the rate of the reaction does not vary with increasing nor decreasing reactants concentrations. On the other hand, first order reaction are reactions in which the rate of reaction is directly proportional to the concentration of the reacting substance (reactants). In this case, i believe the rate of reaction will triple( increase by a factor of 3)
<span>The mass of an electron is not significant to the overall mass of the atom. (B)
It takes roughly 1,850 electrons to equal the mass of ONE proton or neutron,
but the most complex atom has only around 100 of them.</span>