boiling flask, also known as a round bottom flask, is a chemical vessel with a spherical body and a cylindrical neck. I’m hoping you mean like chemistry glassware, if not let me know :) A beaker has a opening almost like a cup. They are both just glass cups/containers. On the other hand, a graduated cylinder is used to measure the volume of liquids. Slanted sides make swirling easy without spilling. Graduated cylinder… Weigh a clean & dry volumetric flask. For the 150mL beaker and the kitchen measuring cup, assume that 50.mL has two sig figs (it will not be obvious based on the volume markings). Third try swirling around some liquid in a normal beaker and then an Erlenmeyer flask, the narrow neck on the flask keeps the liquid inside the vessel better than a beaker. A beaker is used for transporting and mixing solutions. Beakers are available in a wide range of sizes, from one milliliter up to several liters.A beaker is distinguished from a flask by having straight rather than sloping sides. Assume you can read the liquid level to 0.05 inch, and that the liquid surface area in the beaker is 12 in^2 and that in the flask … Add to Wish List. Most also have a small spout (or "beak") to aid pouring, as shown in the picture. This type of flask has a narrow neck and a flat bottom. Fourth, when doing biological cultures you want to keep the media aerated and the wide bottom of the flask allows you to keep a high surface area with which to introduce air. Check the weight of water by subtracting the wt. A flask has a thinner opening and a wider bottom. If people are becoming really interested in your middleware, and are willing to help, think about converting it to an WSGI middleware library so that it can be used in other frameworks.Choose a beaker, flask, or collecting tube and fill it with water to the highest marked volume in mL.If you think your middleware is useful in a few of your apps, and might be helpful for other people, still use the middleware of your framework (what Flask would really typically call an "extension").If you are just writing a middleware that does something specific to your application, use the middleware of your framework.The maintainer of the library specifically made sure that the library could work in multiple frameworks, so he wrote it as a WSGI library.īasically, this is how I would make my decision: If it were written specifically in Flask, then Pyramid developers couldn't use it. For example, Beaker is a session and caching WSGI middleware that could be used in any WSGI framework. One advantage that creating a WSGI middleware has is that it can be used in multiple frameworks. By using the Django middleware, your middleware works on both systems (see this post by James Bennett). One reason is due to the fact that Django was designed to work equally on mod_python and WSGI. The reason you don't have confusion there is because the Django community typically steers developers away from WSGI middleware. Django, in some part, is built on WSGI, so you could theoretically write WSGI middleware or Django middleware in Django as well. Actually, you have the exact same choice in Django.
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