It depends on the backpack, though most full-sized school backpacks are large enough to store a laptop and multiple notebooks and school supplies. A backpack for hiking can be much larger, enough to store multiple days' worth of food, shelter, and other survival supplies.
North Face backpacks range in size.
The smallest ones (considered kids' backpacks) are:
Volume: 976 cubic inches
Dimensions: 15.5" x 11"x 7.5"
The mid-range backpacks are:
Volume: 1526 cubic inches
Dimensions: 19" x 13.5" x 7.5"
The large backpacks are:
Volume: 2502 cubic inches
Dimensions: 22" x 14" x 8.5" Source: North Face website
Around 20 litres
19 inches is the average size of a regular backpack
They are roughly the same size as a normal school backpack. However, they can be a bit smaller as well. Also, they can be comparable to a hiking backpack.
I cram my backpack full of books.
Airplane, bed, backpack
Depends on the size of the books.
As in physically, it depends on the size of the dog and the size of the rucksack. As in legally, I'm not sure but as long as it can breathe and stuff I should see no reason why not
Yes, you can take a backpack on a plane as carry-on luggage as long as it still fits the size and weight restrictions for carry-on baggage.
No a full-size 1990s Ford pick up canopy will not fit 1996 full-size.
they are about the same. it really depends on the type of backpack or parachute backpack you are talking about.
Most commercial backpacks (rucksacks) give their capacity in litres, which is usually unmeaningful to most people. Experience means that the day sack you bought for a Sunday walk, is not big enough for a week of hiking miles from a supermarket or a commercial campsite with a shop. So, basically, your backpack must be of the capacity to suit your needs. Also, from experience, it is better to have a half full backpack than a backpack that is so full of 'essential' equipment that items have to be tied onto the outside of the backpack.
Mybe the materials on which they use to make a backpack
A standard Full size bed is 54x75. A Full XL is 5 inches longer at 54x80.