General Knowledge
A broad collection of answers spanning trivia, science, history, and everyday curiosities that defy a single category.
Written by Joel Walsh
What Is The Fracture Toughness Of A Material?
Fracture toughness is a quantitative way of expressing a material’s resistance to brittle fracture when a crack is present . If a material has high fracture toughness, it is more prone to duc...
What Is Known About Paper Airplanes?
The air around you is one thing that helps a paper airplane fly. ... The aerodynamics of the plane will need to have little drag and be light enough to defy gravity. Paper airplanes also use the...
Where Does The Meat In Dog Food Come From?
According to the Association of American Feed Control Officials (AAFCO), dog food “meat” consists primarily of muscle tissue from cows, pigs, sheep or goats . What kind of meat is used in...
What Is Renewable Energy Procurement?
RECs are a method of tracking the actual amount of electricity produced from renewable energy resources . By buying RECs, companies can effectively offset their own electricity consumption by...
What Is Echogenic Gallbladder?
The anterior wall of the gallbladder is echogenic (solid arrow). A thin layer of bile immediately underneath the anterior wall is seen as a black line (open arrow), and the most superficial ga...
What Substances Are Produced In Aerobic Respiration?
Here, the glucose and oxygen take part in a chemical reaction. The reaction is called aerobic respiration, and it produces energy which transfers to the cells. Aerobic respiration makes two waste pr...
What Is The Difference Between Unemployment Rate And Labor Force Participation Rate?
The key difference between the two is the participation rate measures the percentage of Americans who are in the labor force , while the unemployment rate measures the percentage within the l...
Who Created The First Climate Model?
Two scientists from the Geophysical Fluid Dynamics Laboratory, Drs. Syukuro Manabe and Kirk Bryan , published the model results in 1969. Who invented the climate models? One of the firs...
What Substances Are Present In Both Grape Juice And Fermented Grape Juice?
The most important sugars in grape juice are the two six-carbon sugars glucose and fructose . These are the sugars that make the juice sweet and are fermented to alcohol by the yeast. In addi...
What Is Psychological Fatigue?
A feeling of fatigue caused by things such as lack of exercise, boredom, or mental stress that results in lack of energy and depression . From: psychological fatigue in The Oxford Dictionary...