When Were The First Eyeglasses Made?

The first wearable glasses known to history appeared in Italy during the 13th century. Primitive glass-blown lenses were set into wooden or leather frames (or occasionally, frames made from animal horn) and then held before the face or perched on the nose. Who invented eyeglasses first? Salvino D’Armate probably invented eyeglasses in around 1285, though … Read more

When Was The Trichromatic Theory?

theories of colour vision Who developed the trichromatic theory of vision? Renowned researchers Thomas Young and Hermann von Helmholtz contributed to the trichromatic theory of color vision. The theory began when Thomas Young proposed that color vision results from the actions of three different receptors. Where does trichromatic theory take place? The trichromatic theory operates … Read more

Which Of The Following Best Characterizes The Mississippian Societies Described In The Excerpt?

Which of the following best characterizes the Mississippian societies described in the excerpt? They had mixed agricultural and hunter-gatherer economies that favored the development of permanent villages. Which of the following contributed most significantly to the population trend in pre Columbian Mexico described in the excerpt? Contributed most significantly to the population trend in pre-Columbian … Read more

Why Do You Want To Become A Mental Health Nurse Answer?

Job satisfaction, as well as making a difference to society is arguably the main reason most people are motivated to become mental health nurses and, for the right people, this field of healthcare work can provide stimulation and variety each and every day. Why do you want to become a psych nurse? Not only do … Read more

What Weather Is Associated With An Occluded Front?

There is often precipitation along an occluded front from cumulonimbus or nimbostratus clouds. Wind changes direction as the front passes and the temperature either warms or cools. After the front passes, the sky is usually clearer, and the air is drier. Do occluded fronts cause thunderstorms? A thunderstorm is a storm that produces thunder and … Read more

Why Is Essentialism Important In Education?

Essentialism tries to instill all students with the most essential or basic academic knowledge and skills and character development. … The teachers or administrators decide what is most important for the students to learn with little regard to the student interests. What does an essentialist teacher teach? An essentialist program normally teaches children progressively, from … Read more

When Should I Start Applying For PhD Jobs?

D.’s you should start applying in the late fall before you anticipate graduating. These companies generally have a well-developed recruitment process and are recruiting with the anticipation of bringing someone on several months down the road. They may even plan to have you start with other recent Ph. When should I start applying for jobs … Read more

What Was The Most Important Event In The 1950s?

1950 Year In History including South Africa the Group Areas Act creates Apartheid, NATO Created, China invades Tibet, McCarthy Begins his Persecution of Communists, US Leads World in Korean War following North Korea invasion of South Korea, James Dean big break comes with Pepsi Commercial. What major events happened in the 1950s? Korean War. Senator … Read more

What Is The National Fruit Of Turkey?

Country Common name Scientific name Singapore Papaya Carica Papaya Sri Lanka Jackfruit Artocarpus heterophyllus Turkey Sultana grapes Vitis vinifera United Kingdom Raspberry Rubus idaeus What is USA national fruit? Red rose, National flower of America. White Oak, National tree of America. Giant Swallowtail, National butterfly. Blueberry, National fruit. What is the national fruit of all … Read more

Why Do Car Engines Sound Good?

During each piston’s cycle it produces a pulse of air pressure, which is forced out through the exhausts (they effectively become wind instruments). Each pulse makes a tone, which combined with the other pulses forms a harmonic series. Why do we like engine sounds? Austrian researchers found that people perceive the sound of two-cylinder engines … Read more