Answer:
The correct answer is option 'c':Convection.
Explanation:
When we ignite a campfire the heat produced by combustion heats the air above the fire. As we know that if a gases gains heat it expands thus it's density decreases and hence it rises, if we hold our hands directly above the fire this rising hot air comes in contact with our hands thus warming them.
The situation is different if we are at some distance from the campfire laterally. Since the rising air cannot move laterally the only means the heat of the fire reaches our body is radiation.
But in the given situation the correct answer is convection.
Answer: Several examples point to positive effects on the economy.
Explanation:
In the first place, it is possible to point out that environmental protection protects human health. This saves billions of dollars that could be spent on health issues. On the other hand, people employed in the sector pay taxes like all other citizens. On the other hand, they directly affect the environment. Vast sums of money would also be spent on cleaning these areas, so this organization acts preventively and saves money for the government.
Answer:
The risks associated with the handling of liquid hydrogen are fire, explosion, asphyxiation and extremely low temperature exposure.
Answer: Extension is Final length - initial length. This implies : 31.6-31 =0.6. Therefore the extension is 0.6
Explanation:
The engineering design process is a common series of steps that engineers use in creating functional products and processes.
Steps of the Engineering Design Process
Define the Problem. The engineering design process starts when you ask the following questions about problems that you observe: ...
Do Background Research. ...
Specify Requirements. ...
Brainstorm Solutions. ...
Choose the Best Solution. ...
Develop the Solution. ...
Build a Prototype. ...
Test and Redesign.
Process Engineer responsibilities include:
Developing, configuring and optimizing industrial processes from inception through to start up and certification. Assessing processes, taking measurements and interpreting data. Designing, running, testing and upgrading systems and processes.
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