A piece of wood and a piece of steel are at the same temperature; however, the steel feels hotter. This is because the steel has _____. A- more entropy
B- greater thermal conductivity
C- greater thermal insulation
D- a higher R-value

Answers

Answer 1
Answer:

Answer: The correct answer is "greater thermal conductivity".

Explanation:

Thermal conductivity: It is a ability to conduct heat. Heat transfers occur at a lower rate to material at higher thermal conductivity.

It is defined as the rate at which the heat is transferred through a unit thickness of the substance per area per change in the temperature.

In the given problem, A piece of wood and a piece of steel are at the same temperature. However, the steel feels hotter. The thermal conductivity of the steel is more than the thermal conductivity of the wood.

Therefore,  the correct option is "greater thermal conductivity".

Answer 2
Answer:

B- Greater thermal conductivity


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On a hot summer day you and your friend decided to make a drink by mixing ice cubes water and sugar and koolaid mix . What was the type of change that occurred

Answers

The type of change that has occurred on mixing ice cubes, water ,sugar, koolaid mix is a physical change.

What is a physical change?

Physical changes are defined as  those changes which affect only the form of a substance but not it's chemical composition. They are used to separate mixtures in to chemical components but cannot be used to separate compounds to  further simpler compounds.

Physical changes are always reversible  by using physical means and involve a change in the physical properties.Examples of physical changes include melting,boiling , change in texture, size,color,volume and density.Magnetism, crystallization, formation of alloys are all reversible  changes and hence physical changes.

They involve only rearrangement of atoms and are often characterized to be changes which are reversible.

Learn more about physical change,here:

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Answer:

thats when you mix so that's friction

Explanation:

1 lemonade+1 lemonade=2 lemonaede

and i hope the lemonade tast good! :D

How many moles is 1.50 x 1023 molecules of NH3

Answers

1 mole ------ 6.02 x 10²³ molecules
? mole ------ 1.50 x 10²³ molecules

moles = 1.50 x 10²³ * 1 / 6.02 x 10²³

moles = 1.50 x 10²³ / 6.02 x 10²³

= 0.249 moles  

hope this helps!

.A pure gas that is 14.3% hydrogen and 85,7% carbon by mass has a density of 2.5 g L-' at 0°C and 1 atm
pressure. What is the molecular formula of the gas

Answers

Answer:

C

Explanation:

4× CH2 = C4H8

The periodic table is based on an element'sa. atomic number.
b. atomic mass.
c. molecular size.
d. molecular mass.

Answers

The periodic table of the elements is arranged based on the elements' atomic numbers, starting with 1 (hydrogen) in the top left corner.

Who earned the nobel prize twice for their work with radioactivity

Answers

Answer:

Marie Curie, née Maria Salomea Skłodowska, (born November 7, 1867, Warsaw, Congress Kingdom of Poland, Russian Empire—died July 4, 1934, near Sallanches, France), Polish-born French physicist, famous for her work on radioactivity and twice a winner of the Nobel Prize.

Explanation:

pls give brainlest almost lvled up.

Answer:

Marie Curie is the one who earned the nobel prize twice for her work with radioactivity

Who is regarded as father of modern chemistry ?

Answers

Antoine Lavoisier is considered the father of modern chemistry. He was a French nobleman who recognized and named oxygen and isolated the major components of air.