MHT CET 2021 23th September Morning Shift
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A system gives out \(\mathrm{x} \mathrm{~J}\) of heat and does \(\mathrm{y} \mathrm{~J}\) of work on it's surrounding. What is the internal energy change?
The probability distribution of the number of doublets in four throws of a pair of dice is given by
A student is throwing balls vertically upwards such that he throws the \(2^{\text {nd }}\) ball when the \(1^{\text {st }}\) ball reaches maximum height. If he throws balls at an interval of 3 second, the maximum height of the balls is \(\left(\mathrm{g}=10 \frac{\mathrm{m}}{\mathrm{s}^2}\right)\)
Two electrons occupying the same orbital are distinguished by
For the probability distribution given by following
| $$\mathrm{x}$$ | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
|---|---|---|---|---|---|---|---|
| $$\mathrm{P(X=x)}$$ | 0.07 | 0.2 | 0.3 | $$\mathrm{k}$$ | 0.07 | 0.04 | 0.02 |
Var(X) =

Figure shows triangular lamina which can rotate about different axes moment of inertia is maximum, about the axis