Answer:
a) uranium
b) deuterium
Explanation:
For the first question, you can actually know this by simple logic. The nucleus of Ucranium, has more energy than a pair of deuterium. Ucranium has a mass number and atomic mass higher than deuterium, therefore, when you do a fission with ucranium in it's nucleous, this would be in energy higher than the deuterium.
However, in terms of mass only, the fissioning of 1 gram of Deuterium will produce more energy than 1 gram of uranium, basically because deuterium is lighter and has a lower molecular weight than ucranium. This means that because of this lower molecular weight, in 1 gram of deuterium will contain more number of atoms than in 1 g of uranium. The interaction with these atoms, will produce more energy than the energy produced by uranium.
As the distance between the two slits is <span>decreased, the distance between light bands in the pattern on the screen will increase. The correct option among all the options that are given in the question is the second option or the penultimate option. I hope that this is the answer that has actually helped you.</span>
Answer:
- 4.2 kJ
Explanation:
We shall find out the initial temperature of the gas
PV / T = n R
20 X 10³ X .26 / T = 9 X 8.3
T = 69.6 K
Since the pressure of gas is constant
V / T = constant
V₁ / T₁ = V₂ / T₂
.26 / 69.6 = .12 / T₂
T₂ = 32.12 K
gas is cooling so there will be decrease in internal energy
Change in temperature = 69.6 - 32.12
= 37.48 K.
decrease in internal energy
= - n Cv x fall in temperature
= - 9 x 1.5 x 8.31 x 37.48 ( Cv = 1.5 R given )
= - 4.2 kJ .
