Answer:
d) 1000 times
Explanation:
As we know that difference of sound level is given as

so here we need to find the ratio of two intensity
it is given as



now we have

so it is
d) 1000 times
Answer:a
Explanation: the plates shifts cracking making earthquakes
The S strain Pneumococcus bacteria had a smooth surface because IT IS SURROUNDED BY A CARBOHYDRATE CAPSULE CALLED THE S STRAIN. The other form, the R strain has a rough surface and no capsule. It is only the S strain that exhibits virulence.
Answer:

Explanation:
As we know by radioactivity law

so here we will have


now we will have


now we also know that



Answer:
Total work done in expansion will be 
Explanation:
We have given pressure P = 2.10 atm
We know that 1 atm 
So 2.10 atm 
Volume is increases from 3370 liter to 5.40 liter
So initial volume 
And final volume 
So change in volume 
For isobaric process work done is equal to 
So total work done in expansion will be 