Well, Harry Potter does not have a bag, but if he did, it would probably involve various knick-knacks, his wand, a picture of Ginny Weasley or his parents, and the broken horcruxes of Voldemort.
the bag inside the bag would expand D:
the bag inside the bag would expand D:
In the dialysis tubing bag experiment, if glucose and I2KI are present inside the bag, the color of the I2KI solution will turn blue-black due to the reaction of iodine with starch present in the glucose solution. This color change indicates the presence of glucose inside the bag.
Yes, you can put a bag inside your carry-on bag as long as it complies with the airline's size and weight restrictions.
It was safer in case the bag was stolen or lost as it nearly was when the Snatchers caught them. Besides, the bag had an extension charm on it which meant it was very deep. Harry struggled to find the Dittany and had to summon it, Horcruxes can't be summoned so it would be harder to find.
The bag does not collapse because the air pressure acting on the inside of the bag is equal to the air pressure outside the bag (There are the same number of air molecules per unit volume inside the bag as outside). However if you had filled the bag with air at high altitude where the air pressure is lower, then sealed it and brought the bag down to sea level you would find that the higher external air pressure (there are fewer air molecules per unit volume inside the bag than outside) would begin to compress the bag down to a smaller volume. This in turn would compress the air inside the bag leading to an increase in its pressure. This decrease in volume will continue until the air inside the bag is compressed to the point where its pressure is equal to that of the external air pressure. For further information on this topic it may be worth searching for the term "Combined Gas Law" which will explain the relation between pressure, temperature and volume.
You could increase the air pressure inside a bag by decreasing the volume of the bag, adding more air molecules to the bag, or increasing the temperature of the air molecules inside the bag.
inhaling it inside a airtight plastic bag spraying it alot inside the bag
The air pressure is the same, inside or outside the paper bag.
Harry Wasylyk
it will have a tag on the inside of the bag.
Since tornadoes generate low pressure a sealed bag would expand inside of one.