451 search results

Statistics: What is it or what are they?
Science, Maths & Technology

Statistics: What is it or what are they?

...solidity and certainty to them, but conclusions drawn from numbers are very rarely certain, and statistics uses the language of probability to talk about this uncertainty.) Of course, statistics is concerned with many other areas besides opinion polls. Statistics is used wherever there is quantitative information to be dealt with. Medicine and biomedical science,...
Selective laser melting (SLM)
Science, Maths & Technology

Selective laser melting (SLM)

...solid structure. Material addition in SLM is very stable. Unlike powder feed systems, unmelted material is not lost and can generally be reused. Furthermore, because the layer height is defined by the amount the build chamber is lowered, the layers can be very small, resulting in very fine feature resolution...[Images to demonstrate 'Selective laser melting (SLM)' -see...
Electrical Discharge Wire Cutting (EDWC) and Sawing (EDS)
Science, Maths & Technology

Electrical Discharge Wire Cutting (EDWC) and Sawing (EDS)

...liquid. Heat from the electrical discharge melts away material to form a slot (kerf). EDS is a similar process, but the cutting wire is replaced by a charged steel band saw acting as one of the electrodes...Electrical discharge wire cutting [Diagram to demonstrate 'Electrical discharge wire cutting (EDWC) and sawing (EDS)' - see article ] Electrical discharge sawing...
How do ruminants digest?
Science, Maths & Technology

How do ruminants digest?

...solids, it will burp out the methane and carbon dioxide. What is the reticulem? The reticulem is the second chamber of the stomach. What happens in the reticulem, and what are cuds? Large pieces of plant material float on top of the fluid in the rumen and are passed to the reticulum, which has honeycomb partitions in its walls. Here the food is formed into balls called...
Introducing engineering
Science, Maths & Technology

Introducing engineering

...liquid form, which react chemically to form a solid. The major advantages of adhesive bonding are: Almost all materials or combinations of materials can be joined. For most adhesives the curing temperatures are low, seldom exceeding 180 °C. A substantial number cure at room temperature and provide adequate strength for many applications. Heat-sensitive materials can be...
Level 1: Introductory 15 hrs
Sperm counts
Nature & Environment

Sperm counts

...liquids, the 'head' contains small energy factories called mitochondria, in addition to the cell's DNA - packaged into twenty three chromosomes. At the tip of the sperm's head is a package that contains enzymes that break down protective layers on the egg's surface. Not all human sperm cells look the same. Some have two heads or no heads, some have huge heads, some have...
Article 15 mins
Moons of our Solar System Badge icon
Science, Maths & Technology

Moons of our Solar System

...liquid water layer between the solid icy shell and the rocky interior. The images used here were recorded by NASA’s Galileo orbiter in 1996 and 1997. [This is an image of Europa’s disrupted icy surface.] Figure 16 Europa’s disrupted icy surface The most volcanically active body in the Solar System is Jupiter’s moon Io (Figure 17). It is a fraction bigger than our...
Level 1: Introductory 24 hrs
The science of nutrition and healthy eating Badge icon
Health, Sports & Psychology

The science of nutrition and healthy eating

...solid to liquid. So, over a range of temperatures, butter is neither completely solid nor a runny liquid. It is a mix of solid triacylglycerols in a matrix of a thick liquid made up of the triacylglycerols with the lower-melting temperatures. So, as butter warms up, it becomes easier to spread. Spreadable ‘butters’ have added vegetable oils which ......