Questions and Answers for Science

Science

What are ten examples of solutions that you might find in your home?

Any substance dissolved in another substance is considered a solution. The solvent (the stuff that does the dissolving) in most household substances is water. So, anything dissolved in water would...

Latest answer posted June 21, 2018 5:01 pm UTC

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Science

What are 5 pure elements that can be found in your home?

Most products and materials that would be found in your home are compounds, mixtures or alloys. Only the most stable elements will resist reacting over time. Metals found in the home are often...

Latest answer posted January 21, 2016 10:24 pm UTC

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Science

How do you calculate the number of neutrons?

Take note that the nucleus of an atom is composed of protons and neutrons. And the number of particles present in the nucleus is referred as mass number (Also, called as atomic mass). mass number =...

Latest answer posted October 22, 2014 12:00 am UTC

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Science

What are the four basic functions of a computer system?

Although on the surface it seems that computers are very sophisticated devices, capable of accomplishing complex tasks, in fact, computers can only do a limited number of very simple tasks on a...

Latest answer posted September 19, 2015 9:37 pm UTC

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Science

What would happen to the life of a cell if there was no Golgi apparatus?  

The golgi apparatus contains vesicles and folded membranes and is involved in cellular transport. It is a packaging organelle. The golgi apparatus packages proteins into vesicles inside of the cell...

Latest answer posted July 11, 2016 8:43 pm UTC

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Science

What is the relation between the focal length and the radius of curvature ? prove?

The focal length (f) of a lens is the distance between the center of the lens and the point at which the reflected light, of a beam of light travelling parallel to the center line, meets the center...

Latest answer posted June 1, 2013 9:48 pm UTC

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Science

What is the difference between saturated, unsaturated, and supersaturated? 

Saturated, unsaturated and supersaturated refer to three different conditions of a solution. A saturated solution contains the maximum amount of solute that will dissolve at that temperature. Any...

Latest answer posted November 19, 2015 4:27 am UTC

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Science

List these items in order from largest to smallest: organelle, cell, tissue, organism, population, molecule.

Let's reason our way through this.Organelles are the substructures (such as mitochondria and chloroplasts) inside cells that perform particular functions. They are therefore smaller than...

Latest answer posted July 22, 2016 9:09 pm UTC

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Science

What are the three parts of the cell theory?

The cell theory is an explanation of what cells are and why they exist. The three main parts are: 1) All living things are made of cells and their products, 2) New cells are created by old cells...

Latest answer posted July 17, 2012 2:55 pm UTC

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Science

Why is it important for scientists to know the properties of matter?

It's important for scientists to know the properties of matter because all things are made up of matter. Each type of matter has different physical characteristics and scientists need to know and...

Latest answer posted November 18, 2015 8:36 pm UTC

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Science

What are the functions of a computer?

While the functions and applications of a computer are almost endless, we can sense four primary purposes that are all linked to data (information): Entering data, manipulating data, viewing...

Latest answer posted July 6, 2009 9:23 pm UTC

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Science

What are the purposes of research?

Research is simply a detailed and focused study, using scientific methods, to understand why something happens and/or what are its applications. Research is basically done for two purposes: to...

Latest answer posted October 6, 2015 12:35 pm UTC

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Science

What is a scientific question?

A scientific question is a question that may lead to a hypothesis and help us in answering (or figuring out) the reason for some observation. Asking a scientific question is a part of the...

Latest answer posted October 6, 2015 5:49 am UTC

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Science

What are the some example of a solution, solvent, and solute?

A solution is the final product once a solute is dissolved within a solvent. A very important example of a solution used in hospitals is saline used in IVs. Saline is made up of salt and water....

Latest answer posted July 30, 2015 1:34 am UTC

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Science

CuO + H2 -> Cu + H2O

The given reaction is `CuO(s) + H_2(g) -> Cu(s) + H2O(l)` In this reaction, copper (II) oxide reacts with hydrogen to generate copper metal and water. This is an oxidation-reduction reaction, in...

Latest answer posted May 11, 2016 1:19 am UTC

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Science

What is the importance of the high specific heat of water for life on Earth?

Specific heat capacity is the amount of heat required to raise the temperature of a substance by 1 K. It is expressed in the units J/ (kg*K). A high specific heat of a substance means that a large...

Latest answer posted February 19, 2011 3:28 pm UTC

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Science

Which characteristics enabled Earth to support and sustain life?  

There are a number of factors that enable life to exist on Earth. Here is a brief list of some of those factors: Distance from Sun: Earth is at the right distance from the Sun, the star it orbits....

Latest answer posted May 12, 2016 1:06 pm UTC

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Science

Why is a car not a living thing?

A car is not a living thing because it does not fulfill some key characteristics that define living things. All living things are composed of cells. Unicellular organisms are composed of a single...

Latest answer posted April 18, 2016 12:33 pm UTC

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Science

An atom that has gained or lost electrons is called an ___.

Atoms consist of electrons, protons and neutrons. While the protons and neutrons are present inside the nucleus, the electrons orbit around it. Among these particles, protons are positively...

Latest answer posted May 15, 2016 6:20 pm UTC

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Science

Arrange these biological terms in order of size (from the smallest to the largest): organ, cell, organism,...

The smallest item in the list would be organelles. Organelles are tiny structures within a cell, that help it to function. Example of organelles are-- nucleus, mitochondria, cell membrane to name a...

Latest answer posted September 9, 2010 3:07 am UTC

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Science

What are some examples of a closed system?

A closed system does not exchange mass with its surroundings and is only capable of exchanging energy with the surroundings. In comparison, an open system is capable of exchanging both mass and...

Latest answer posted January 16, 2016 2:19 pm UTC

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Science

Difference Between Speed And Velocity

The short answer is that velocity is the speed with a direction, while speed does not have a direction. Speed is a scalar quantity—it is the magnitude of the velocity. Speed is measured in units of...

Latest answer posted April 7, 2014 8:21 pm UTC

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Science

What is the difference between art and science?

There are two paramount differences between art and science. The first is that art is subjective while science is objective. The second is that art expresses knowledge, most often in the form of...

Latest answer posted June 17, 2010 4:17 am UTC

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Science

What would make your hair and nails all of a sudden start to grow rapidly? There has been no change in diet.

One reason for sudden hair and nail growth could be due to an improvement in your overall health. There are many vitamin deficiencies that can cause your hair and nails to grow slowly. Sometimes...

Latest answer posted May 25, 2010 8:24 am UTC

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Science

Similarities Between Photosynthesis And Cellular Respiration

Similarities ... → Both involve in production of energy → Both involve the exchange of gases → Both the process takes place in cell organelle which was considered as endosymbiotic organism. They...

Latest answer posted June 23, 2012 5:12 pm UTC

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Science

An ion of iron has an 26 protons, 30 neutrons, and 23 electrons. What are its atomic number, atomic mass, and net...

The atomic number of an atom is the number of protons. The atomic mass is the sum of the protons and neutrons. The net charge is the difference between the number of protons, which have positive...

Latest answer posted December 7, 2015 10:02 pm UTC

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Science

give at least 3 examples of community

In ecology, there are different levels of organization regarding the biotic, or living factors, in the ecosystem. An individual is a single organism, a population is a group of organisms of the...

Latest answer posted October 31, 2015 12:24 am UTC

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Science

Can spiders lay their eggs under human skin?

The idea that spiders lay eggs in or under human skin is a surprisingly common myth, but it's just that, a myth. All spiders are free-living hunters, not parasites. Spiders cannot lay eggs or live...

Latest answer posted August 27, 2011 10:29 pm UTC

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Science

What is the difference between the smooth endoplasmic reticulum and rough endoplasmic reticulum?

Both the smooth and rough endoplasmic reticulum help in the production and storage of proteins The main difference is that one contains ribosomes on it and the other does not. The rough endoplasmic...

Latest answer posted October 22, 2015 11:12 pm UTC

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Science

What is an example of a poor conductor?

A material can be a poor conductor of heat, electricity, or both. A poor conductor means that the substance will not easily conduct heat or electricity (or both) as easily as a conductor. For...

Latest answer posted July 8, 2018 12:07 pm UTC

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Science

How can I determine the reactivity of an element?

The reactivities of elements can be predicted by periodic trends (patterns within the Periodic Table.) Let's start with periodic trends. An element's reactivity is its tendency to lose or gain...

Latest answer posted November 27, 2015 7:40 pm UTC

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Science

the speed of light is 3.0x10^8 m/s. how long does it take light to reach the earth from the sun, which is 1.5x10^11m...

This question can be solved using the classic equation of motion: distance = velocity * time. We have two known parameters and one unknown parameter; however, in order to solve the problem we must...

Latest answer posted February 23, 2012 10:20 pm UTC

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Science

Are there more examples of changes that are both chemical and physical other than a candle burning?

A physical change does not accompany any change in composition of the material. For example, the melting of wax is not a change in composition, as it still stays wax and hence is a physical change....

Latest answer posted November 18, 2015 2:15 pm UTC

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Science

What are the 3 main ways to identify an element?

Elements are types of atoms that have a unique number of protons. In fact, from left to right, the periodic table is arranged by the number of protons that each element contains. The periodic table...

Latest answer posted February 26, 2016 1:24 pm UTC

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Science

How much would it cost to run a 60 watt light bulb 24 hours a day if the rate of electricity is $0.09/kW.h?

The electricity provider charges $0.09 per kilowatt hour. The light bulb uses 60 watts and is run 24 hours a day. To calculate the cost of running the light bulb we need to calculate how many...

Latest answer posted December 5, 2015 7:43 pm UTC

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Science

when will the average velocity be equal to instantaneous velocity?

Average velocity is equal to the instantaneous velocity when acceleration is zero. In order for acceleration of an object to equal zero, there can be no change in speed or direction. For example,...

Latest answer posted July 27, 2011 10:46 pm UTC

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Science

What are the imaginary lines that run from the north to south pole on a map? What are the lines that divide Earth...

The imaginary vertical lines that run from the North pole to the South pole on a map are called longitudinal lines. The Prime Meridian is the longitudinal line that has a value of 0 degrees. On a...

Latest answer posted February 1, 2016 2:01 pm UTC

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Science

What are the 10 steps of the scientific method? Please help! i need for Honors acedemic core!

Hagar, I've always taught this as four steps, but I found this at answers.com and am copy pasting it here to help you out: 1. Understand the Problem2. Collect Information3. Form a Hypothesis4....

Latest answer posted July 16, 2011 3:49 am UTC

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Science

What is meant by "experimental set-up" and "control set-up" in biology?

When you set up an experiment, you have to have one set up where you introduce the independent variable (the experimental set up) and one where you do not (the control). That way, you can compare...

Latest answer posted September 17, 2010 11:32 pm UTC

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Science

How can you determine whether an equation is endothermic or exothermic?

There are a couple of ways to determine if a reaction is exothermic or endothermic. Endothermic meaning that heat is added to the reaction to make the reactants interact and exothermic meaning heat...

Latest answer posted September 29, 2010 8:45 am UTC

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Science

What are the 4 types of consumers?

The four types of consumers in ecology are herbivores, carnivores, omnivores, and decomposers. Herbivores are consumers who only eat vegetables, plants, grass, or some type of vegetation. An...

Latest answer posted December 5, 2015 8:34 pm UTC

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Science

What is the valency of copper?  

Copper is one of the transition elements and thus exhibits variable oxidation states. It has two valencies: +1 and +2 and the corresponding atoms are termed as Cuperous (+1 valency) and Cupric (+2...

Latest answer posted December 27, 2015 7:15 am UTC

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Science

how we can separate a mixture of ammonium chloride and sodium chloride

There are way in separating mixtures of chlorides salts such as that of sodium chloride and ammonium chloride. It can be done by crystallization, filtration or sublimation. The easiest method among...

Latest answer posted July 8, 2013 5:32 pm UTC

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Science

What are some examples of symbiosis in plants (aside from lichens)?

The most common definition of symbiosis is a mutually beneficial relationship between two different species closely interacting with each other. These interactions tend to be long term with the...

Latest answer posted May 4, 2016 10:04 am UTC

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Science

Do the number of puppies a dog has depend on the number of times she breeds during one heat, or what? I want to mate...

While consulting a veternarian is probably the wisest step to take, there is some general information that is available to you from different sources. One of the basic considerations is the breed...

Latest answer posted November 26, 2009 2:38 am UTC

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Science

An empirical formula of a compound is CH2O and the molecular weight of the compound is 180.18. What is the molecular...

The empirical formula of a chemical compound is CH2O. The molar mass of carbon is 12, the molar mass of hydrogen is 1 and the molar mass of oxygen is 16. The empirical formula of a compound is the...

Latest answer posted January 31, 2012 10:46 am UTC

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Science

Rank the following items in order from largest to smallest: cell, chromosome, gene, DNA, organism, nucleus.

The ranking of the given items from largest to smallest is as follows: Organism > Cell > Nucleus > Chromosome > Gene > DNA DNA is a molecule that can be thought of as the blueprint...

Latest answer posted December 7, 2018 12:04 pm UTC

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Science

How does a burning candle show both physical and chemical changes?

When a candle burns, there is both a physical and chemical reaction. The physical change is quite obvious and in fact, it can be seen. When the candle burns, the wax slowly melts and the candle...

Latest answer posted February 11, 2014 11:01 pm UTC

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Science

Is frying an egg a physical or chemical change?

Matter is composed of particles. Particles are composed of one or more type of atom. Changes in Matter Physical Change: Physical change occurs when the particles of a substance become rearranged,...

Latest answer posted May 15, 2016 4:23 pm UTC

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Science

Two strips of potatos.. one placed in distilled water and the other in air.. what will happen to them both and why?

The process that happens to both potato slices is called osmosis, which is a diffusion of water across the semipermeable membrane the potato slice cells possess. The water will either go into the...

Latest answer posted January 22, 2012 5:13 am UTC

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