is changed to by the application of a certain force—of metals and other solids. Plastic forming is primarily used in the metalworking of steel materials such as those for automobile parts. Unlike cutting with a lathe, this method does not produce chips and also allows mass production of the...
In what products is plastic used, according to the text?() A. Clothing B. Aeroplane parts and flame retardants. C. Food packaging. D. Food packaging, clothing, aeroplane parts and flame retardants. 相关知识点: 试题来源: 解析 D 反馈 收藏 ...
Plastic production is also one of the most energy-intensive manufacturing processes in the world. So, before a traditionally packaged parcel arrives at a consumer’s door, it has already contributed seriously to the climate crisis. Then, all too often, this packaging ends up in a landfill ...
It is lightweight. What is the material of the sculpture? A. wood B. stone C. plastic D. metal 相关知识点: 试题来源: 解析 C。解析:题目中明确提到雕塑是由塑料制成的,所以答案是 plastic。wood 是木头,stone 是石头,metal 是金属,都不符合题意。 反馈 收藏 ...
The production of plastics has increased dramatically over the past few decades. This is due in part to the growth of the global economy and the increase in the use of plastic products. The majority of plastics are made from crude oil, which is a non-renewable resource. This means that as...
High Density Polyethylene, often referred to as HDPE, is built from carbon and hydrogen elements. This plastic is hard, opaque in color and is adorned with the #2 resin identification code. Its many packaging applications range from milk jugs, laundry and dish detergent containers to bleach and...
16 This is not necessarily so. Anyone can become a better student if he or she wants to. Here’s how: Plan your time carefully. When planning your work, you should make a list of things that you have to do. After making this list, you should make a schedule of your time. First ...
is called the “elastic region” and the region above it is called the “plastic region.” In the elastic region, there is a linear relationship between stress and strain, which is known as “Young’s modulus” or the “modulus of longitudinal elasticity” and is generally expressed as “E...
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What is simulation? Any process that contains a flow of events, from air temperatures in a crowded room to the manufacture of aninjection molded plasticpart, can be simulated and tested visually. Simulations can be used to optimize a design, test a theory, train or improve safety, and even...