CHEMISTRY MIDDLE SCHOOL

Name two landforms created from deposits by rivers.

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Answer 1
Answer: Alluvial fans and deltas are formed.

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which type of heat transfer involve heat flow from hot object to colder object A. convection, but not conduction and radiation B. convection and radiation, but not conduction, convection and conduction, but not radiation D.all of three

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D option is correct. Because heat can transfer in any form. 

A microwave oven has a power rating of 850 w. If the microwave oven is turned on for 6 minutes ,how much energy will it use?state the units in your answer

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Power is given by;

P = (E)/(t)

850    = (E)/(6 * 60)
  
      E = 850 * 360
    
      E = 306000
   
      E = 306 kJ

An acid, like HCI, would...

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Answer: melt

Explanation:
Probably ost likely melt.

Iron is produced in a blast furnace.Explain why most of the iron produced in a blast furnace is converted into steels.

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It has nothing related to science . It is just dependent on the demand. If the demand for steel is high(as it is high)then most of it is used in making steel . Steel has many advantages thus it has a high demand.
I believe raw iron corrodes easily hence most of the iron is converted into steel , so as to increase its demand , life span and utility,

Help me!!! Several small craters lie in the floor and on the walls of crater 2. Which is older,crater 2 or the smaller craters inside it?

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Well, think of it this way. If you put a big paper circle on the ground, and then you put smaller circles on top of the big circle, which one would have been there longer? The big circle, of course. So the same logic applies here: if the smaller craters had been older than the big crater, then when the big crater was formed, the smaller ones would've been buried. Therefore, crater 2 is older than the smaller craters inside it.
Hope that helped! =)

A group of students performed an experiment to prove the law of conservation of energy. In the experiment, a flask containing water at room temperature was shaken vigorously for a few minutes. The table shows a partial record of the temperature of the water before and after shaking.Experimental Record
Temperature
Before Shaking 20 °C
After Shaking Unknown
What best predicts the unknown temperature? (3 points)

a. Less than 20 °C because the total energy of the system after shaking is lower

b. Greater than 20 °C because the total energy of the system after shaking is higher

c. Less than 20 °C, because the mechanical energy from shaking transforms to thermal energy

d. Greater than 20 °C, because the mechanical energy from shaking transforms to thermal energy

Answers

Answer: The most accurate answer is Option D.

Explanation: It's actually 22 degrees. Energy cannot be created of destroyed, but transferred and transformed to one form or another. The movement of the container, mechanical energy was transferred to the water, as heat energy. Therefore is raised the water temperatures slightly.
In physics and chemistry, the law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be conserved over time. Energy can neither be created nor destroyed; rather, it can only be transformed or transferred from one form to another.
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