The correct answer is: technology:
Some objects are not expensive in themselves, but their production is very costly (for example very thinly cut objects can be expensive even if their materials are not very expensive. The cost of their production depends on the technology used - whether this technology is costly.
<u>House Un-American Activities Commitee</u> was in charge of investigating claims of communist activity in the government, armed forces, universities, and other areas.
<u>Explanation</u>:
House Un-American Activities Committee (HUAC) was responsible for investigating Fascist or Communist ties on citizens, employees and organizations in both public and private sector. HUAC was established in the year of 1938 by House of Representatives of United States of America.
The main aim of HUAC was to promote the ideas of U.S citizens that communism could be in their country and they are free from disloyalty and revolutionary activities. Second Red Scare was a phenomenon that was started after the World War II.
Answer:
In a classroom of several students with mild to moderate learning disabilities, the teacher would have to develop a lesson plan which employs different ways of including exceptional learners in the science class by doing the following:
-using examples
the teacher can give real form to the lesson by merging the varying illustration that best explains the topic from students' experiences to help influence the understanding of the students towards the new concepts.
-Using Videos
The teacher can choose to introduce videos on the internet to his students with special needs to sharpen and emphasize the understanding of he students towards the new concepts.
Rio De Janerio, my friend.
Answer: Both are chemical changes.
Explanation:
Tarnish can be defined as the product of the chemical reaction that occurs between a metal and a no-metal. The metal which is exposed to the moisture or get oxidized develop a thin layer called tarnish. Copper, silver, brass, magnesium and other metals get tarnished.
The polish removes the chemical product of tarnishing and keeps the silver in silver spoon intact. This involves the chemical reaction.
Salt and vinegar are the ingredients of the chemical formulation which can remove the chemical product of the tarnishing from penny. This involves the chemical reaction.
Both polish and silver and vinegar can bring a chemical changes in the metal without introducing the physical change as they do not affect the physical structure of the metal.
