It is based on the flow area, which is proportional to the square of the diameter. 2 squared = 4. 4 squared = 16. So, the 4 inch pipe can take 16/4 = 4 times the volume of the 2 inch pipe. It might be less confusing if you had picked sizes other than 2 and 4. This is a rough calculation, since pipe inside diameters are not the same as nominal sizes, but close enough for most purposes.
This problem lies with your pipe sizes. If the pipes size of your main line does not equal the supply for demand this will result in the current problem. For example, if your whole house is fed with half inch piping and you open two taps the volume of water has to be shared from the half inch pipe, thus causing a drop in pressure. Whereas if one installed three quarter inch main line "t-ing" off to half inch, because the three quarter inch will hold a higher volume of water when two taps are opened and the water shared, the drop in pressure will be hardly noticeable.
It depends on the plumbing code in your hometown. But realistically, I have seen houses with a 1/2 inch waterfeed supply 3 families. The bigger the diameter of the pipe, the more volume will incur in the dwelling. More than likely better to run 3/4" to each bathroom group with the last tee to your toilet.
You can take any sized cylinder and pump it up to 4 psig. The bigger the cylinder, the more air it will take to increase the pressure to that 4 pounds-force per square inch. Think it through and the idea will lock in.
Secondary.
I assume you mean a 4 x 2 square tube that is loaded in the direction of the 4 inch dimension; then it is stronger than a 4 inch channel with flange width of 2 inches loaded in the direction of the 4 inch dimension, because the square tube has more inertia
If the flow velocity remains the same the flow volume will increase by the square of the diameter ratio.(2/1.25) = 1.6 = diameter ratio1.62 = 2.56 more flow volume through 2 inch pipe compared to 1.25 inch pipe.
conutht
Typically laptops with 17 inch screens are quite weighty - they can weigh six pounds or more. If you are looking for something easier to carry, you may have to sacrifice screen size.
The question asks for a comparison that is not valid. It is like asking which is more 3 apples or 4 books? A square inch is a measure of area whereas a cubic inch is a measure of volume. They measure different things and it makes no sense to try and convert from one to the other.
The steeper the slope, the faster the water will run, and the more sediment it can carry.The larger the volume of water that is moving, the more sediment it can carry with it.
A four wheel drive vehicle can carry more passengers and cargo.
The steeper the slope, the faster the water will run, and the more sediment it can carry.The larger the volume of water that is moving, the more sediment it can carry with it.
The steeper the slope, the faster the water will run, and the more sediment it can carry.The larger the volume of water that is moving, the more sediment it can carry with it.
The steeper the slope, the faster the water will run, and the more sediment it can carry.The larger the volume of water that is moving, the more sediment it can carry with it.
The steeper the slope, the faster the water will run, and the more sediment it can carry.The larger the volume of water that is moving, the more sediment it can carry with it.
The steeper the slope, the faster the water will run, and the more sediment it can carry.The larger the volume of water that is moving, the more sediment it can carry with it.
The Toyota Tacoma is rated to carry a maximum payload of 1,540 pounds. The four-wheel drive version can carry slightly more.