How do countries know when they have a comparative advantage in the production of a good? Countries have a comparative advantage in production when they can produce a good or service at a lower opportunity cost than other producers. Countries are better off if they specialize in producing the goods for which they have a […]
What are the types of phalanges?
What are the types of phalanges? CONTENTS Type I: Proximal Phalanges. Type II: Intermediate Phalanges. Type III: Distal Phalanges. Why are the phalanges important? The phalanges are the bones of the fingers and toes. Phalanges is the plural form of phalanx. Every other finger and toe has three phalanges (proximal, middle, and distal). The phalanges […]
What are the physical and chemical properties of matter give examples?
What are the physical and chemical properties of matter give examples? Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change. A chemical change always produces one or more types of matter that differ from the matter present before […]
Is Fibreglass insulation still used?
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?
Is momentum conserved when a ball hits a wall?
Is momentum conserved when a ball hits a wall? When it hits a vertical wall it rebounds with a horizontal velocity v to the left. Since momentum is mass times velocity there would be a tendency to say momentum has been conserved. But momentum has changed from +mv to −mv. Why is momentum not conserved […]
Is Onyx a black diamond?
Is Onyx a black diamond? Black diamond consists of carbon molecule alone, while onyx is a type of chalcedony quartz that consists of silicon and oxygen. That’s why we say the two gemstone come from different families. Onyx is much softer, rating 7 on the scale. Therefore, a black onyx is easier to be damaged […]
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? […]
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 […]