A. Identify the type of molecule shown in the drawing. (2 points)

Answer:

Gas

Explanation:

The atoms, ions, or molecules that make up the gas are further apart and move freely at high speeds and is can easily be compressible.

Answer:

Gas

Explanation:

A gas is a substance or matter in a state in which it will expand freely to fill the whole of a container' having no shape like a solid and no fixed volume like a liquid.

Explanation:

what do you have written I can't understand one word right a properly

Answer:

Objects that can emit light energy by themselves are known as luminous objects. Objects that cannot emit light energy by themselves are known as non-luminous objects.

Explanation:

Explanation:

Luminous objects:- The objects that can emit light energy by themselves are known as luminous objects.

Objects like the sun that give out or emit light of their own are luminous objects.

Other examples of luminous bodies are Electric bulb, torch etc.

Non-luminous objects:- the objects that can not emit light energy by themselves are known as Non- luminous objects.

Objects like the moon that do not give out or emit light of their own are Non- luminous objects.

Moon is an example of a non-luminous object as we can see the moon because it reflects light from the sun.

Other examples of Non luminous bodies are pen, pencil, chair, wood etc.

Luminosity – It is defined as the luminous intensity in a particular direction; or we can say it is the apparent brightness of an image.

The brightness of a star is defined as the total energy radiated in unit time. It is related to the surface area (A) and the effective temperature (TT) ( the temperature of a black body having the same radius as the star and radiating the same amount of energy per unit area in one second ) by a form of Stefan’s law, here is given by

⇒L=AσT4⇒L=AσT4

where 

σ is the Stefan’s constant and L is the luminosity.

Note:

The laptop screen, mobile screen you are looking at right now is luminous but the page of your book is a non-luminous object, which is why you need a light on to read it.

Answer:

40.0 L

Explanation:

The formula to find the new pressure: [tex]\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}[/tex]

P₁ = 15.0 L

V₁ = 2 atm

T₁ = 300 K (Convert Celsius to Kelvin by adding 273)

P₂ = 1

V₂ = ?

T₂ = 400 K

[tex]\frac{(2)(15)}{300} = \frac{P_2(1)}{400}[/tex]

[tex]\frac{30}{300} = \frac{P_2}{400}[/tex]

[tex]\frac{1}{10} = \frac{P_2}{400}[/tex]

Multiply both sides by 400 to isolate the P₂

[tex]\frac{400}{10} = P_2[/tex]

[tex]P_2 = 40[/tex]

Explanation:

The 2019 water crisis in Chennai has made us realize the importance of saving water more than ever. Water, as we all know, is a finite resource without which our planet would be a barren wasteland. Today with our increasing population it would be logical to say that our water consumption has also increased. And with increasing demand and lesser supply, water scarcity arises. Our ancestors who had foreseen the potential dangers of water scarcity had developed methods to conserve water that was suited for the varied terrain of the Tamil-speaking kingdoms.

Traditional Rainwater Conservation methods of Tamil Nadu

Eri

There are no perennial rivers in Tamil Nadu except the Thamirabharani River which flows through Thirunelveli district. And so, several hundred years ago a simple system was devised to utilize the rainwater to the fullest. An Eri or tank system is one of the oldest forms of water conservation systems in India. Many Eris are still in use in Tamil Nadu and play an active role in irrigation. They act as water reservoirs and flood control systems. They prevent soil erosion, recharge groundwater, and prevent wastage of runoff water during heavy rainfall.

Kudimaramathu

Kudimaramathu is one of the old traditional practice of stakeholders participating in the maintenance and management of irrigation systems. During earlier days, citizens of a village used to actively participate in maintaining the water bodies of their village by deepening and widening the lakes and ponds and restoring the water bodies back to their original form. The silt, rich in nutrients, collected in the process would be used by the farmers themselves in their field. A sense of collective ownership ensured the continued survival of the water bodies.

Answer:

B. Knowing the color and brightness of a star

Explanation:

Answer :

0.9999432 g/cm^3

The density of water in g/ml up to 4 significant figures at 6°C is 0.9999432 g/cm³.

Significant figures are used for establishment  of a number which is presented in the form of digits. These digits give a meaningful representation  to the numbers.

The significant figures are the significant digits which convey the meaning according to the accuracy. These provide precision to the numbers and hence are called as significant numbers.There are rules for counting significant figures which are as follows:

1)All non-zero digits are significant .

2)All zeroes which occur between non-zero digits are significant.

3)All zeroes to the left and right of  a non-zero digit are not significant.

4) All zeroes on right  of decimal are significant if a non-zero number follows them.

5)All zeroes on right side of non-zero digit are significant

Learn more about significant figures,here:

https://brainly.com/question/29153641

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Answer:

All right. So let's calculate the density of a glass marble. Remember that the formula for density is mass over volume. So if I know that the masses 18.5 g. And I know that the um volume is 6.45 cubic centimeters. I can go ahead and answer this to three significant figures. So it's going to be 2.87 grams per cubic centimeter. Okay, that's our density. Now, density is an intensive process. Okay. We're an intensive property. I really should say. It doesn't depend on how much you have. Mhm. If I have one marble, its density is going to be 2.87 g per cubic centimeter. If I have two marbles, the density will be the same because I'll double the mass and I'll also double the volume. So when I divide them I'll get the same number. Okay, that's what makes it an intensive property. No matter how many marbles I have, they'll have the same density. Mass though is not an intensive property. So if I have six marbles and I want to know what the massive six marbles is. Well, I know the mass of each marble is 18.5 g. So the mass of six marbles Is going to be 100 11 g. Because mass is an extensive property. It depends on how much you have. If I change the number of marbles, I'm going to change the mass. That's an extensive property. All right. So we've calculated the density. We've calculated the mass and then what happens to the density of one marble compared to six marbles as we mentioned before. Since densities and intensive property, the densities will be the same, no matter how may.

Explanation:

Answer:

The elements of Group VIIA (new Group 17 – fluorine, chlorine, bromine, iodine, and astatine) are called the halogens (tan column). The term “halogen” means “salt-former” because these elements will readily react with alkali metal and alkaline earth metals to form halide salts

Option B, Metals have good conductivity.

Hope it helps you.. pls mark brainliest if it helps you

Answer:I dunno

Explanation:it is the best thing I ever said in this app

Answer:

According to significant figures we have leading zeros, trapped zeros and zeros at the beginning. So that number is a leading zeros and its has 7 SGF.

Answer:

Bromine is a dark reddish-brown fuming liquid with a pungent odor. Denser than water and soluble in water. Hence sinks in water.

Answer:

The opposite action of boiling (liquid to gas, evaporation) is condensing

Sublimation is the opposite of deposition

Top antonyms for melting (opposite of melting) are frozen, advent and arrival.

Explanation:

on edg

Answer:

graduated cylinder

Answer:

12 gal

Explanation:

474.2 mix 1 gal/39.5 mi = 12 gal

Answer:

The choose 2. H2O , HCN

I hope I helped you^_^

Answer:

volume = l x h x w

this is just like your cylinder question. none of the answers represent the equation. sorry

Answer:

45

Explanation:

yes i need help please

Answer:

it's a property of a cell, tissue and organisms that allows to maintain and regulate the stability and constancy to function properly

Answer:

See explanation below for answers

Explanation:

0.00305

0.00310

0.00300

0.00305

0.00305

When there is a decimal point, you must skip the zeros until you reach a number. Once you reach that number, you move 2 more places to the right of that number in order to have 3 significant figures. Hope this helps!

Answer:

Modern science is typically divided into three major branches that consist of the natural sciences (biology, chemistry, physics, astronomy and Earth science), which study nature in the broadest sense; the social sciences (e.g. psychology, sociology, economics, history) which study people and societies; and the formal ...

Explanation:

The four major branches of science are, Mathematics and logic, biological science, physical science and social science. The first branch is mathematics & logic.

Answer:

no all protons in an element doesn't contain an identical number of neutrons . number of electrons and number of protons contain identical number but the number of neutrons may vary. for eg: protons and neutrons of hydrogen is 1 and 0 respectively whereas protons and neutrons of helium is 2 and 2 .

Answer:

chemical changes

I hope it's helps you

Answer:The answer is in the attached file below

Explanation:

Answer:

one unit to the left

Explanation:

cm are 10 times mm, so to convert you have to divide by ten

Examples

100 mm = 10,0 cm

0.50 mm = 0.05 cm