A soda in a styrofoam cup with a lid, coffee in a thermos with the lid closed is the isolated systems.
<h3><u>Explanation:
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Styrofoam cups and thermos containers are typical examples of containers that don’t allow the transfer of heat energy in their environments. A system is said to be isolated if it doesn’t allow heat exchange with its surroundings. A Styrofoam cup with a lid keeps the coffee hot due to its insulation properties.
Thermos container is a more effective insulator since it is made of double-walled container to lock either heat or cold inside. Insulators create effective isolated system depending on the materials they were made from. A completely isolated system does exist.
The reason why W.E.B. Du Bois criticize Booker T. Washington was because he criticized criticized Washington's passive and cautious ways. Washington did not want to be like an extremist but only suggested to educate the African Americans what they can contribute and have a place in the society.
The answer would be the first choice.
I believe it's psychological.
Answer:
1.An ecosystem is a community of living organisms with living and non living species
2.The Karoo National Park
3. [ This is a link of the picture ] http://www.nature-reserve.co.za/exploring-karoo-national-park-wildlife.html
Explanation:
<span>It is very important to practice firearm safety whenever you own a firearm. You should check your barrel frequently to see if there is an obstruction. If you have an obstruction in your firearm, you should make sure your firearm is unloaded before using a cleaning rod to remove any obstruction. After using the cleaning rod, check the barrel again to make sure that all of the obstruction has been removed before reloading your firearm.</span>
