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4 years ago

Which best explains why metal cooking utensils often have plastic coating on the handles

1 answer:

4 0

Metal solids contain a positively-charged cation surrounded by a "sea" of delocalised, negatively-charged electrons.

The electrons are able to move freely, and hence transfer kinetic energy throughout the implement at a much quicker rate than non-metals.

Plastic is made of non-metals (Mostly carbon and hydrogen) and therefore is a poor thermal conductor.

Therefore, by coating the metal utensil in plastic, the rate of heat energy transfer to the person in contact's hand is decreased.

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Which of the following describes something an engineer would probably do

OLEGan [10]

Answer:

C. Research what has been done in the past to clean up oceanic oil

residue.

Explanation:

The engineer being an innovator would probably have to dig through the past to see what has been done before him and in what way his technology is addressing the problem. If sees that his invention is unique, he would get a patent for his invention and then proceed to design the device. If he does not do this, he might just waste his whole duplicating an invention already made.

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4 years ago

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20. What is an irreversible change?

Contact [7]

Answer:

A change is called irreversible if it cannot be changed back again. For example you cannot change a cake back into its ingredients again. Irreversible changes are permanent.

Explanation:

Hope this helps!! :))

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3 years ago

Read 2 more answers

What are the effects of cellular phones on our lives? What was the cause for this invention? positive effect 1:

Ahat [919]

Better communication - could save lives, i.e calling for ambulances or the police service

7 0

3 years ago

How does solar energy affect climate?

andriy [413]

Answer:

It makes it things grow and it is renewable energy meaning that its infinite and will help life grow fruits grass and with that comes how animals live including us human how does it effect climate it make thing warm and sometimes hot and can cause thunder to make the place cool down sorry if wrong

4 0

3 years ago

10 points. Please help.

sergiy2304 [10]

Answer:

The temperature of the balloon is 46.34 K.

Explanation:

An ideal gas is a theoretical gas that is considered to be composed of point particles that move randomly and do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:

P * V = n * R * T

In this case:

P= 0.76 atm
V= 10 L
n= 2 moles
R= 0.082 $\frac{atm*L}{mol*K}$
T= ?

Replacing:

0.76 atm* 10 L= 2 moles* 0.082 $\frac{atm*L}{mol*K}$ *T

Solving:

$T=\frac{0.76 atm* 10 L}{2 moles* 0.082\frac{atm*L}{mol*K}}$

T= 46.34 K

The temperature of the balloon is 46.34 K.

3 0

3 years ago