Does mineral oil expand when frozen? No, all oils get more dense when they are cooled. Most crude oils do not actually freeze as they are incapable of developing crystalline structures. But some crude oils have a high amount of paraffin and have a ‘pour point’ above 80 deg F. That means they are solid […]
What does a photoelectric smoke alarm detect?
What does a photoelectric smoke alarm detect? A photoelectric smoke detector is characterized by its use of light to detect fire. Inside the alarm, there’s a light-sensing chamber. In this chamber, an LED light shoots a beam of light in a straight light across the chamber. How do photoelectric smoke detectors work? Photoelectric smoke alarms […]
How did hunter-gatherers change to farmers?
How did hunter-gatherers change to farmers? Agricultural communities developed approximately 10,000 years ago when humans began to domesticate plants and animals. By establishing domesticity, families and larger groups were able to build communities and transition from a nomadic hunter-gatherer lifestyle dependent on foraging and hunting for survival. How were early farmers different from hunter-gatherers? First, […]
How old do buzzards get?
How old do buzzards get? Buzzards are extremely long lived. Most live to be fifty, but records exist of one old buzzard living to be a hundred years old. Do Buzzards pair for life? Buzzards normally mate for life and a pair will fiercely defend their territory from any intruders. What is an old buzzard? […]
Which arthropods have 3 pairs of legs?
Which arthropods have 3 pairs of legs? Insects are arthropods that have three body segments, three pairs of legs, one pair of antennae, and many have one or two pairs of wings. What are the 3 types of arthropods? A large majority of arthropods belong to the three main groups: Insects. Arachnids. Crustaceans. Which animal […]
What percentage of ballet dancers have eating disorders?
What percentage of ballet dancers have eating disorders? Eating disorder diagnoses and behaviors were assessed with a semi-structured clinical interview, the Eating Disorder Inventory (EDI), and a weight history interview. Results: Eighty-three percent of dancers met lifetime criteria for AN (6.9%), BN (10.3%), AN+BN (10.3%), or EDNOS (55.0%). Why are ballerinas anorexic? Ballet dancers are […]
When did Homer write his epics?
When did Homer write his epics? The Homeric epics—the Iliad and the Odyssey, probably dating from the 8th century bce—are the oldest texts of any bulk. What are two famous Greek epic poems? Perhaps the most widely known epic poems are Homer’s The Iliad and The Odyssey, both of which detail the events of the […]
Can Club Foot be corrected?
Can Club Foot be corrected? Over the course of six to eight weeks, clubfoot may be corrected without surgery. Casting is more successful for those with mild clubfoot and those treated within the first two weeks of birth. Babies and older patients who have severe clubfoot may not respond to casting. They need surgery to […]
Can icing sugar replace castor sugar?
What is nickel ore used for?
What is nickel ore used for? Nickel has outstanding physical and chemical properties, which make it essential in hundreds of thousands of products. Its biggest use is in alloying – particularly with chromium and other metals to produce stainless and heat-resisting steels. What is bauxite used for in the Dominican Republic? Nine of the mine-rich […]