Science Questions and Answers

Science

Mosquitos bite and suck your blood, as opposed to stinging. One way you can keep them away is with candles that produce smoke. You can also use fans. If you don't want to stay inside a net, you...

Latest answer posted March 3, 2012, 1:23 pm (UTC)

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Science

Recycling used to be the norm, not the exception. It was not until the modern industrial age, around the 19th century, that we started making things disposable and if became necessary to throw...

Latest answer posted March 1, 2012, 3:33 pm (UTC)

4 educator answers

Science

We see things because light reflects off of them and enters our eyes. The light passes through the pupil and into the lens of the eye. The lens is filled with a dense, clear gel which slows the...

Latest answer posted April 12, 2012, 6:54 pm (UTC)

1 educator answer

Science

People typically move from rural areas to urban areas for a number of reasons. These include better access to employment and educational facilities, entertainment facilities, medical and healthcare...

Latest answer posted March 23, 2016, 1:17 pm (UTC)

1 educator answer

Science

The immune system is an incredibly complex system, and there are many different types of white blood cells that have different roles in responding to a pathogen such as a virus. I will discuss two...

Latest answer posted May 3, 2016, 4:27 pm (UTC)

1 educator answer

Science

The atmosphere serves several purposes for us here on Earth. For starters, 21% of its composition is oxygen, which all animals must have to conduct cellular respiration, the process that helps...

Latest answer posted May 12, 2012, 6:01 pm (UTC)

1 educator answer

Science

There are many factors which put an individual at risk for cardiovascular problems. Many of these factors are controllable. The first is obesity. American have a high rate of obesity which causes...

Latest answer posted March 3, 2010, 9:54 am (UTC)

2 educator answers

Science

A diode is an active device that consist of a pn junction that was made on s semiconductor. The junction is usually realised by consecutive diffusion of acceptor and donor dopants one one side of a...

Latest answer posted October 18, 2013, 7:15 am (UTC)

1 educator answer

Science

Hydrogen bonds are found between fluorine, oxygen and nitrogen atoms when each try to bind with a hydrogen bond. Because of the size difference between the atoms, the attraction of electrons...

Latest answer posted June 5, 2012, 12:34 am (UTC)

1 educator answer

Science

Fossilization occurs in animals that died and were buried very quickly, perhaps in mud, a body of water, or a sand storm. Over time, more sediment continues to pile on top of the animal. Most of...

Latest answer posted March 15, 2010, 1:34 am (UTC)

1 educator answer

Science

Well, I can't explain all of the things you study in physics here. I can point you in some good directions. I don't know how much math you have had, but if you intend to do quantum physics with...

Latest answer posted July 6, 2016, 9:18 pm (UTC)

1 educator answer

Science

Nursing caps, as you are aware, come in many shapes and sizes and are often unique to different learning institutions. Initially they all had the same function; to cover the hair completely. The...

Latest answer posted November 6, 2009, 12:27 pm (UTC)

1 educator answer

Science

As odd as this may seem, in 1887 U.S. tariff laws made vegetables taxable, but not fruits. This caused some legal concerns regarding the tomato. In 1893, the U.S. officially declared the tomato a...

Latest answer posted March 29, 2010, 11:25 am (UTC)

2 educator answers

Science

Weddell seals can live further south than any other animals in Antarctica. Females give birth from September through November. For the first seven weeks, the young nurse from mother's mammary...

Latest answer posted November 19, 2010, 9:53 pm (UTC)

1 educator answer

Science

The fact that Australia consumes more oil than it produces leads to a reliance on imported energy. The implication for the future lies in the fact that Australia is faced with the challenge of...

Latest answer posted April 18, 2010, 11:55 pm (UTC)

2 educator answers

Science

I know that Arsenic is a semi-metallic poisonous element. Used in the past as rat poison, and is commonly found in insecticides and other pesticides. Element 33 Symbol As, Atomic mass 75. It's...

Latest answer posted March 15, 2013, 10:12 pm (UTC)

1 educator answer

Science

Nitrous oxide has the chemical formula N2O and is composed of two atoms of nitrogen and one atom of oxygen. It is a greenhouse gas but is only very sparingly present in the Earth's atmosphere. It...

Latest answer posted November 21, 2015, 4:24 pm (UTC)

1 educator answer

Science

Professional language is necessary to convey precise meanings in all specialized fields, but the use of such language can also create barriers between professionals and members of the groups that...

Latest answer posted March 25, 2021, 5:58 am (UTC)

1 educator answer

Science

In case of multiplication or division, the answer cannot have more significant digits than the number with least number of significant figures. Here, 80 has the minimum number of significant...

Latest answer posted September 1, 2015, 11:19 pm (UTC)

1 educator answer

Science

120 volts means voltage that the iron operates. 600 watt means the work done or the amount of electric power. Electric power(P), voltage(V) and current(I) is combined with the follwing equation....

Latest answer posted October 18, 2012, 9:38 am (UTC)

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Science

Eye complications are very common with people who suffer from diabetes. While some people with diabetes will develop blindness, most will suffer minor eye complications. The earlier eye problems...

Latest answer posted May 27, 2010, 12:41 pm (UTC)

3 educator answers

Science

This can be called postural hypotension. Some effects that are felt from postural hypotension is light headedness, dizziness, and faintness. This is a result of a drop in blood pressure when you...

Latest answer posted May 30, 2010, 12:00 am (UTC)

3 educator answers

Science

If you assume the atom is not ionized, then yes, you can deduce the location on the periodic table and the reactivity. However, electrons are extremely fickle. If an atom is not ionized, it will...

Latest answer posted July 18, 2019, 2:28 am (UTC)

1 educator answer

Science

You are mixing units. Your distances and velocities are in feet/second but you used 9.8 m/s/s for the value of g. The value of g is 32.174 ft/s/s. 32.174/9.8 = 3.28 172.1/3.28 = 52.6 feet.

Latest answer posted January 18, 2012, 8:43 am (UTC)

1 educator answer

Science

One certainly has noticed that some things heat or cool more quickly than other things. A careful, controlled observation would reveal that each pure substance has its own rate of gaining or...

Latest answer posted January 23, 2012, 8:06 am (UTC)

1 educator answer

Science

The system responsible for balance in humans is known as the vestibular system. It is composed of a series of parts that the human body uses to determine balance by sensing directional change, and...

Latest answer posted December 9, 2015, 7:42 pm (UTC)

1 educator answer

Science

Usually the reaction of `NaNO_2 ` is made from the alkaline solution of `NaOH` . If we used `NaOH ` as the alkali solution the reaction can be written as: `NaNO_2 + Zn + NaOH -> Na_2ZnO_2 + H_2O...

Latest answer posted July 17, 2013, 9:40 am (UTC)

1 educator answer

Science

Many times when scientists dig for fossils in an area, the fossils seem to be adapted to a different climate, environment, habitat, etc. This is due to the fact that although presently as in your...

Latest answer posted August 24, 2010, 7:11 am (UTC)

1 educator answer

Science

To auscultate means to listen, auscultation is the act of listening to body sounds with a stethoscope. The health care provider can and should auscultate many things. Heart tones or sounds can be...

Latest answer posted August 26, 2010, 4:49 pm (UTC)

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Science

High blood pressure or hypertension is called the "silent killer" because most individuals who have it don't feel sick. A minority of people will have signs and symptoms such as headache,...

Latest answer posted August 28, 2010, 7:25 pm (UTC)

2 educator answers

Science

The driver of a car cannot withstand an acceleration of more that 3g. g is the acceleration due to gravity and equal to 9.8 m/s^2; 3g is an acceleration equal to 29.4 m/^2. If the driver is...

Latest answer posted September 28, 2013, 6:38 am (UTC)

1 educator answer

Science

Some scientists in China are attempting to use insect wings as a model for nanoscale structure patterns. Apparently, they used the wings of cicadas. The wings of these insects are characterized...

Latest answer posted March 3, 2012, 1:20 pm (UTC)

1 educator answer

Science

Pascal's triangle is pretty neat. Apparently the ancient Chinese were able to construct it using counting rods, so it was actually around before Pascal named it. However, since he named it and we...

Latest answer posted March 1, 2012, 3:31 pm (UTC)

3 educator answers

Science

In the medical world, a prion is a proteinaceous infectious protein called cellular prion protein (PrPc). PrPc is naturally located on cells that are found within the central nervous system, but it...

Latest answer posted January 26, 2016, 8:36 pm (UTC)

1 educator answer

Science

There are four major types of macromolecules; carbohydrate, protein, lipid and nucleic acid. Carbohydrate functions as structure maintenance, transportable and storage forms of energy. Glucose is a...

Latest answer posted June 5, 2012, 12:41 am (UTC)

1 educator answer

Science

The clear covering of the eye is called the cornea. The cornea itself is composed of five distinct layers, which (from outside to inside) are the corneal epithelium, Bowman's membrane, Corneal...

Latest answer posted May 7, 2016, 7:22 pm (UTC)

1 educator answer

Science

It has used the right formula, but it has not replaced the correct angle. Note that the magnetic field is directed to the South and the electric current to 30 degrees over the West direction. In...

Latest answer posted January 24, 2016, 10:25 pm (UTC)

1 educator answer

Science

Lipstick is composed of wax, oil, moisturizer and pigment. The exact recipe varies from manufacturer to manufacturer. However, a mixture of several different types of waxes is normally used,...

Latest answer posted May 19, 2016, 1:56 am (UTC)

1 educator answer

Science

For the first compound, Bi stands for bismuth which makes a 3+ cation. SO4 is the sulfate anion and has a 2- charge. So Bi2(SO4)3 stands for bismuth sulfate. For the second compound, Rb stands...

Latest answer posted November 5, 2012, 2:37 am (UTC)

1 educator answer

Science

Solubility is a term describing the capability of solutes to be dissolved in water. Cholera, Vibrio cholerae, is a living bacteria that can affect person who ingested food contaminated with...

Latest answer posted May 27, 2013, 5:58 am (UTC)

1 educator answer

Science

Every force field (be it gravitational, electric, magnetic, etc) make its presence felt by the fact that it acts with a force on a so called test object. In fact the intensity of the field is...

Latest answer posted October 22, 2013, 7:19 am (UTC)

1 educator answer

Science

Compared with the atmosphere with the Earth, Venus is denser thus containing higher amounts of air particles suspended in the atmosphere. It contains mostly of Carbon dioxide (~96%) and Nitrogen...

Latest answer posted December 18, 2012, 6:02 am (UTC)

1 educator answer

Science

Neurons, which are nerve cells are unable to carry out mitosis once they are formed. They are referred to as amitotic. It is thought that they have switched off much of the cell's machinery needed...

Latest answer posted February 10, 2013, 2:56 pm (UTC)

1 educator answer

Science

Radiometric or radioactive dating is a technique in which radioactive elements are used to determine the age of a rock or a fossil, etc. All radioactive elements decay, at a certain rate, into more...

Latest answer posted March 9, 2016, 1:30 am (UTC)

1 educator answer

Science

In America, even though we are one country there is a wide variety of cultures. These cultures tend to be varied based on geographic region. People in the South, especially South-east, have very...

Latest answer posted March 5, 2012, 12:15 pm (UTC)

1 educator answer

Science

Yuck. When the gum tissue around your back teeth become infected, that is Pericoronitis. As others have mentioned, the reason it usually occurs with kids in the late teens and young adults is...

Latest answer posted March 3, 2012, 1:16 pm (UTC)

3 educator answers

Science

In A and B, both devices are the classic "Perpetual Motion Machine." Both are supposed to have a way to theoretically harness an energy to do work. Unfortunately, for any energy to be transferred...

Latest answer posted October 29, 2013, 4:13 am (UTC)

1 educator answer

Science

Local Group is a term used in astronomy. It refers to the group of about fifty galaxies that includes our own, the Milky Way. The Milky Way has about 400 billion stars and is 120,000 light years...

Latest answer posted January 27, 2016, 3:59 am (UTC)

1 educator answer

Science

To all who have lost someone to cancer (which is probably all of us), you have my sympathy. In reply to the original question, there is no one answer because there is no one type of cancer. Every...

Latest answer posted June 8, 2011, 10:12 pm (UTC)

7 educator answers

Science

The field of psychotherapy does not have a universal licensing body or board. There is no specific set of standards to which all psychotherapists are accountable. Some therapists are psychiatrists...

Latest answer posted August 7, 2011, 8:34 am (UTC)

1 educator answer

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