Is Fibreglass insulation still used? ‘Fibreglass loft insulation was invented in 1947 and the chances are that because you live in an old house you have it in your roof. It is now obsolete and inefficient, so the government are advising people to have it replaced with new modern insulation. Is fiberglass a good electrical […]
Who are the 5 scientists who discovered cells?
Who are the 5 scientists who discovered cells? 1595 – Jansen credited with 1st compound microscope. 1655 – Hooke described ‘cells’ in cork. 1674 – Leeuwenhoek discovered protozoa. 1833 – Brown descibed the cell nucleus in cells of the orchid. 1838 – Schleiden and Schwann proposed cell theory. What is the first cell on earth? […]
What would be the reaction force if a boy rowing a boat forward?
How can I measure long distance without tools?
How can I measure long distance without tools? One method is to measure from the line on your wrist to the tip of your middle finger – good for measuring long surfaces. For shorter distances, measure the length of your pinkie finger. It’s a lot easier to use your pinkie for smaller dimensions since it’s […]
What type of load does eye bolt take?
What type of load does eye bolt take? Use eye bolts at a horizontal angle greater than 45°. Sling strength at 45° is 71% of vertical sling capacity. Eye bolt strength at 45° horizontal angle drops down to 30% of vertical lifting capacity. Use a swivel hoist ring for angled lifts. How do I choose […]
Is it a good idea to melt snow with hot water?
What type of evidence should be collected first?
What type of evidence should be collected first? In order of collection, the most fragile evidence must be collected first. A crime scene investigator may start with hairs and fibers and fingerprints and then work his or her way through the evidence, peeling back one layer at a time. What do blood patterns tell investigators? […]
Why is silver not used for electrical wires?
Why is silver not used for electrical wires? Though silver is a very good conductor of electricity but still that is not used in electric wiring primarily due to its cost. It’s very expensive compared to the widely used wiring material copper. Another reason for not using silver is that , it oxidizes easily and […]
Why is England not a country?
Why is England not a country? Just like Wales and Scotland, England is commonly referred to as a country but it is not a sovereign state. It is the largest country within the United Kingdom both by landmass and population, has taken a pivitol role in the creation of the UK, and its capital London […]
How can you tell how old a diamond is?
How can you tell how old a diamond is? Jewelry professionals can identify the time period of a diamond by examining the shape and facets of the stone. Diamond cuts have evolved from early old mine diamond cuts to today’s brilliant cut diamonds. Trained professionals will be able to analyze the diamond to determine the […]