Science Questions and Answers

Science

Most sources will tell you there are around 639 to 640 muscles throughout the human body. There are 30 facial muscles alone. The muscles of the human body are divided into three categories...

Latest answer posted July 30, 2016, 3:02 pm (UTC)

1 educator answer

Science

First find the volume of the pool. V = lwh = 14.8 * 39.2 * 5.0 = 2900.8 cubic feet. Now there are 7.48 gallons of water in one cubic foot, so you have 2900.8 cu. ft. * 7.5 gal/cu.ft. = 21756...

Latest answer posted January 17, 2012, 4:53 am (UTC)

1 educator answer

Science

In the study by Rahman et al. (2007), the effect of arsenic exposure (through drinking of contaminated tube well water) on fetal loss and infant death was studied for Matlab, Bangladesh. The target...

Latest answer posted September 17, 2015, 5:30 pm (UTC)

1 educator answer

Science

Humans, along with apes, and a considerable number of Old World monkeys are trichromatic, which literally means "three colors," having three different kinds of opsins (light sensitive protein...

Latest answer posted January 29, 2012, 10:29 pm (UTC)

2 educator answers

Science

The term "national eating disorder" is applicable to several eating disorders that are of an unhealthy nature, some resulting in unhealthy eating practices, some resulting in a score of health...

Latest answer posted December 13, 2015, 10:12 pm (UTC)

1 educator answer

Science

The figure is below. a) The difference of the two vectors, `Delta(P) = P_f -P_i` is found by drawing the two vectors (initial and final momentum) from the same point. The above difference is the...

Latest answer posted October 19, 2013, 7:02 pm (UTC)

1 educator answer

Science

Microbiology is the branch of life science that concentrates on very small life forms. In Microbiology you would study bacteria, viruses, and microscopic invertebrates. Many microbiology courses...

Latest answer posted June 29, 2012, 5:18 pm (UTC)

1 educator answer

Science

I do not think there is any way we could know the center of the universe. How can we, when we do not even really know the full extent of the universe? Do you know where the universe ends? So if...

Latest answer posted September 24, 2012, 2:45 am (UTC)

2 educator answers

Science

As the previous person said, mass and weight are related. When you use a Newton meter it is measuring Force. But with any weight measuring device it stretches or compresses a spring in the device...

Latest answer posted June 17, 2015, 2:47 am (UTC)

2 educator answers

Science

Initially the ball has kinetic energy. When it goes up potential energy will increase. Since energy can neither destroy nor created the kinetic energy will reduce. It will result in decreasing the...

Latest answer posted February 28, 2013, 4:13 am (UTC)

1 educator answer

Science

Molar mass of NaOH = 40g/mol Number of NaOH moles in 8.5g = 8.5/40 mol = 0.2125 mol number of NaOH moles in 686ml of 0.25M = 0.25/1000*686 mol...

Latest answer posted September 6, 2012, 2:16 am (UTC)

1 educator answer

Science

Because the vertical and horizontal forces are perpendicular to one another, we can find the net force in each direction independently of the other. So, the net force in the horixontal (X)...

Latest answer posted November 7, 2011, 8:29 am (UTC)

1 educator answer

Science

Depending on the time of the year, the hemisphere you are in may be closer or farther away from the sun. This "seasonal" time could have an influence on the height of the high tide and the lowness...

Latest answer posted December 28, 2011, 5:13 am (UTC)

1 educator answer

Science

Keeping detailed and accurate biodiversity inventories is one means in which biodiversity conservation is researched. Such an inventory is kept by Harvard within their Harvard Forest. Biodiversity...

Latest answer posted February 16, 2016, 1:35 pm (UTC)

1 educator answer

Science

"Sickle cell anemia is an autosomal recessive genetic disorder caused by a defect in the HBB gene, which codes for hemoglobin. The presence of two defective genes is needed for sickle cell...

Latest answer posted May 10, 2010, 12:17 am (UTC)

1 educator answer

Science

Biological molecules are those molecules that are associated with the life functions and primarily happening in every cell. These molecules are essential in order to pursue metabolism and...

Latest answer posted May 29, 2013, 5:45 pm (UTC)

1 educator answer

Science

Please see the link below for more information.

Latest answer posted November 3, 2009, 3:03 am (UTC)

1 educator answer

Science

Diabetics need to be very watchful of what they eat. Proteins are considered to be a fairly safe food choice for diabetics. They do not raise sugar levels and they are not incredibly high in...

Latest answer posted June 16, 2010, 8:34 am (UTC)

2 educator answers

Science

The half life of a first order reaction can be solved using the expression: `t(1/2) = (ln(2))/(k)` since we are given the value of the t1/2, we can solve the value of k. `k = (ln(2))/(t 1/2)` `k...

Latest answer posted November 30, 2012, 2:01 am (UTC)

1 educator answer

Science

Heart disease or cardiomyopathy is endemic in the U.S. and is a major contributing factor of premature death and disability. There are numerous types of cardiomyopathy with varying etiologies...

Latest answer posted May 8, 2010, 7:01 pm (UTC)

2 educator answers

Science

Cleaved DNA fragments from 2 sources can only recombine artificially. This does not occur naturally. Recombination is accomplished by chemically altering one strand, resulting in the removal of a...

Latest answer posted November 27, 2008, 9:05 am (UTC)

1 educator answer

Science

A cation is a positively charged ion. The type of cation present in a salt can often be identified by the color of the precipitate formed when various chemicals are added to the salt. Cations can...

Latest answer posted March 6, 2016, 5:08 pm (UTC)

1 educator answer

Science

A number of human activities are degrading our natural capital. Deforestation for timber is one such activity and is a potential cause of soil erosion, apart from loss of habitat for various...

Latest answer posted December 14, 2015, 2:24 am (UTC)

1 educator answer

Science

The spots of butterflies are adaptive features, that is, they are a result of adaptation. These spots indicate to predators that such butterflies may contain toxic materials and be dangerous to...

Latest answer posted March 13, 2016, 2:38 pm (UTC)

1 educator answer

Science

The term incommensurable comes from the Greek for having no common measure and originated in the field of mathematics. As applied in science, theories are commensurable if they can be directly...

Latest answer posted May 19, 2016, 2:15 pm (UTC)

1 educator answer

Science

The energy of a photon is given by the formula `E = (h*c)/lambda` where c is the speed of light, h is Planc's constant and `lambda` is the wavelength of the electro-magnetic radiation. This gives...

Latest answer posted September 3, 2013, 4:11 am (UTC)

1 educator answer

Science

Population changes take place due to a number of factors, such as food and resource availability, predation and environmental factors. When the availability of food reduces, population decreases....

Latest answer posted October 2, 2015, 1:10 am (UTC)

1 educator answer

Science

Humidity is the amount of water vapor in the atmosphere. Air usually contains invisible water vapor, not to be confused with clouds and fog which are visible condensed water droplets. Relative...

Latest answer posted December 21, 2015, 4:46 am (UTC)

1 educator answer

Science

With the earth spinning at over one thousand miles per hour and hurtling around the sun at 67,000 miles per hour, it may seem strange that we can't feel that movement. The simple explanation is...

Latest answer posted November 28, 2018, 1:35 am (UTC)

1 educator answer

Science

If you are looking at the rate of flow this is usually measured as volume per unit time. Most burettes are marked with mL. Did you think about measuring the flow in terms of mL of water left in...

Latest answer posted June 10, 2010, 11:57 pm (UTC)

1 educator answer

Science

I would have to think that the space race is a thing of the past. With the economies of the two leading nations the way that they currently are I would think either government would have a...

Latest answer posted October 18, 2010, 4:05 pm (UTC)

6 educator answers

Science

Global warming itself is not necessarily a controversy. However, people are arguing about what causes it. That is the controversial part. Some say it is caused by humans, others say it is a...

Latest answer posted February 28, 2012, 2:29 pm (UTC)

5 educator answers

Science

Metals constitute the majority of elements in our periodic table of elements. They are extremely useful for a number of application due to their unique properties, especially, electrical...

Latest answer posted January 28, 2016, 11:44 am (UTC)

1 educator answer

Science

Physical therapists make good money, but physical therapy assistants do not. They often make minimum wage. So you will want to be careful about deciding fully on your career path, because going...

Latest answer posted February 23, 2012, 2:14 am (UTC)

2 educator answers

Science

Endosymbiosis is a condition of existence where one organism literally lives within another organism. This condition has been used to explain the existence and production of lots of structures,...

Latest answer posted May 12, 2012, 6:29 pm (UTC)

1 educator answer

Science

This is a problem of converting units. I prefer to do these with fractions. I first set up the unit I am starting with, and write the unit I want to get to. `(1.33g)/(1cm^3)` ...... `[kg]/m^3`...

Latest answer posted July 17, 2016, 12:02 am (UTC)

1 educator answer

Science

Humans have a total of 46 chromosomes. 23 chromosomes come from each parent. There are 23 homologous chromosomes. Males contain an XY pair, whereas females contain an XX pair. 47,XYY is a condition...

Latest answer posted November 18, 2015, 5:36 pm (UTC)

1 educator answer

Science

A Darwinian would say that we did not evolve from apes but share a common ancestor with apes. That Darwinian scientist would tell you that we did not "create" our own species but evolved through...

Latest answer posted September 24, 2012, 6:03 pm (UTC)

1 educator answer

Science

There is a considerable difference between the biblical account of the origin of the world and that of modern science. According to Genesis the world was created by God around six thousand years...

Latest answer posted November 4, 2012, 4:18 pm (UTC)

1 educator answer

Science

That would be an electrical current. Current is the flow of electrons in an electrical circuit. One thing that makes metals good conductors of electrical charge is they have loose electrons in...

Latest answer posted December 15, 2015, 8:25 pm (UTC)

1 educator answer

Science

One important concept that applies to all populations is that of limiting resources. In any ecological niche, the availability of certain resources will fix the upper limit of population growth....

Latest answer posted January 12, 2013, 4:48 am (UTC)

1 educator answer

Science

Hurricanes and typhoons are the same type of weather event, occurring in different areas. Depending on its location and strength, a tropical cyclone is referred to by names such as hurricane,...

Latest answer posted February 16, 2012, 7:10 am (UTC)

1 educator answer

Science

The word placebo comes from the Latin and means I shall please. The placebo effect is a positive response to the placebo (their condition is improved) despite the fact that the placebo is inert....

Latest answer posted December 11, 2015, 6:09 pm (UTC)

1 educator answer

Science

Both membrane channel proteins and membrane enzyme proteins are proteins found on the phospholipid bilayer of cell membranes and form class of cell surface receptors. Thus they play a major role in...

Latest answer posted September 7, 2013, 12:11 am (UTC)

1 educator answer

Science

Epigenetics are the "markers" that determine which portion of our DNA is meant to be used at a given time, by a given cell. Since each cell contains a complete copy of the entire organism's DNA,...

Latest answer posted February 15, 2020, 11:47 am (UTC)

1 educator answer

Science

Matter can be divided into two main types, pure substances and mixtures. Pure substances are elements and compounds. Elements exist as atoms (or molecules of the same type of atom) and compounds...

Latest answer posted January 10, 2016, 9:14 am (UTC)

1 educator answer

Science

The answer is calcium bromide, `CaBr_2` . Calcium has 2 valence electrons, as seen from the electron dot formula. It readily donates them to achieve stable electronic configuration and forms the...

Latest answer posted October 7, 2015, 11:43 pm (UTC)

1 educator answer

Science

I find this a little creepy, but it might be necessary. Some examples of geo-engineering include artificial trees to suck more carbon dioxide out of the air, mirrors in space used to deflect a...

Latest answer posted March 4, 2012, 4:42 am (UTC)

3 educator answers

Science

In any scientific investigation, you must first pose a question or problem. In this case it would be, which drug is better at relieving excess stomach acid, Pepcid or Gaviscon? Next, you will...

Latest answer posted September 24, 2010, 9:42 am (UTC)

1 educator answer

Science

Calorie comes from the Latin, calor, meaning heat. A Calorie is a measure of heat energy. In many countries, Calories are a measure of the energy stored in the foods we eat. A definition for the...

Latest answer posted September 30, 2010, 7:33 am (UTC)

1 educator answer

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