Eugene works at a carpet factory. Which natural polymer does he most likely work with to make the carpets?

Johnny has 4 Cups of hot cocoa. The instructions tell him to add 1 pint of water for every 2 pints of cordial. How much water sh

White raven [17]

I’m assuming the cordial is cocoa, two cups equals a pint. So he should add 1 pint or 2cups of water. Whichever measurement you need.

8 0

2 years ago

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What kinds of experiments could be done to determine if the shiny nugget is really gold? select all that apply. select all that

lorasvet [3.4K]

One of the most important characteristic of a metal is its density. As density is the mass of any substance per unit volume. If one can measure the mass of the given shiny metal and its volume then the density of the metal can be determined. The density if matches with the density of the real gold then one can determine the metal is gold or not. The other experiments given will not work in any condition as-

1. Gold doesn't react with water.

2. The hardness of any metals are more than the non-metals and it is not at all an unique property of any metal.

3. All the metals usually reacts with acids or bases with more or less extent. thus it cannot identify the metal is gold or not.

4. The magnetic property is an inherent property of metal. There are several metals which shows magnetic property. Thus gold cannot be identified by this way.

6 0

4 years ago

A student measures the mass of an 8 cm block of brown sugar to be 12.9 g. What is the density of

horrorfan [7]

Answer:

0.0025g/cm³

Explanation:

Given parameters:

Mass of the brown sugar = 12.9g

dimension of the sugar = 8cm

unknown:

density of the sugar = ?

Solution

Density is defined as the mass per unit volume of a substance. The expression is given below:

Density = $\frac{mass}{volume}$

We know the mass of the substance but the volume is unknown:

Volume of the brown sugar = l x bx h = 8x8x8 = 512cm³

Density of the brown sugar = $\frac{12.9}{512}$ = 0.0025g/cm³

8 0

3 years ago

Which actions represent endothermic reactions? Check all that apply. an instant ice pack becoming cold, splitting a gas molecule

DerKrebs [107]

Answer is: an instant ice pack becoming cold, splitting a gas molecule and baking bread.

Endothermic reaction is chemical reaction that absorbs more energy than it releases.
In ice pack, reaction absorbs heat from the surroundings (endothermic reaction), lowering the surrounding temperature.
For splitting molecule and baking bread we must add energy to break bonds between atoms.

6 0

3 years ago

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Which list places the layers of the sun in the correct order from innermost to outermost? Corona, photosphere, chromosphere Phot

Savatey [412]

Answer:

Layers of sun from inner to outermost layer-

Core<Radiative Zone<Convection Zone<Photosphere<Chromosphere<Transition Zone<Corona

Explanation:

The Sun is comprised of 7 layers, of which 3 forms the inner layers and 4 forms the outer layers.

The inner layers are namely-

Core- It is the innermost layer of the sun where the energy is produced by nuclear fusion process and the temperature is significantly high, about millions of degree celsius. Here, the hydrogens are combined in order to form helium .

Radiative zone- This is the zone through which the energy is radiated by the photon from the core outward in the form of electromagnetic radiation that usually takes more than about 170,000 years to radiate.

Convection zone- This layer starts from the interior of about 200,000 kilometers extending up to the visible surface of the sun. The temperature in this zone is extremely high but comparatively less than the core. The energy emitted from the core is then radiated through this zone. Here, the convection cells are generated due to the continuous heating and cooling of heated materials.

The outer layers of sun are as follows-

Photosphere- This layer is considered as the solar surface which is mostly concealed by the presence of granulations, that are initiated by the bubbles of gases formed in the convection zone and also presence of sunspots that are formed due to the stronger magnetic field. The temperature ranges here from 4000° to 6500°K.

Chromosphere- Here, the temperature rises extensively as one goes away from the sun and the temperature in this layer ranges from 4000° to a maximum of 8000°K.

Transition region- It is a thin layer which is about 60 miles only where the temperature highly increases from about 8000° to 500,000°K. The reason behind this increase in temperature is yet to be discovered.

Corona- It is the outermost layer where the temperature range is from 500,000° K to 1,000,000° K. This layer is difficult to be seen with the naked eye but can be seen using a coronagraph telescope during the time of solar eclipse.

8 0

3 years ago

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