Science Questions and Answers

Science

The Inquisition was an arm of the Roman Catholic Church that was supposed to make sure that Catholics held to correct, orthodox beliefs. When Galileo started to publish his works about the idea...

Latest answer posted February 3, 2010, 9:48 am (UTC)

1 educator answer

Science

Chronic renal failure means you have a serious problem with your kidneys. You need a kidney transplant or you will die. Eventually your kidneys will go out. Acute renal failure means some...

Latest answer posted February 24, 2012, 9:04 am (UTC)

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Science

The rungs of the ladder consist of complementary base pairings between adenine and thymine, cytosine and guanine in the DNA double helix. When DNA unwinds, either side can be used as a template to...

Latest answer posted April 27, 2012, 2:24 am (UTC)

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Science

Vertigo is a balance disorder. It can result in dizziness as well as a feeling of nausea and sometimes even vomiting. Vertigo is classified as either central or peripheral. Central vertigo can be...

Latest answer posted October 10, 2010, 9:55 am (UTC)

1 educator answer

Science

An ubiquitous feature of fairs and amusement parks is the Ferris Wheel. As the name implies, it is an enormous wheel. Standing vertically, there are seats or platforms for people to stand. These...

Latest answer posted April 24, 2014, 5:11 pm (UTC)

2 educator answers

Science

Answer: In a magnetized material, the domains are parallel one with each other. Explanation: Magnetism comes from the spins of valence electrons of atoms. In magnetic materials, these spins are...

Latest answer posted October 15, 2013, 9:32 am (UTC)

1 educator answer

Science

Kinetic energy is the energy of motion. You are describing two different types of energy here, one being kinetic energy, the other being electrostatic energy by induction. Kinetic energy is...

Latest answer posted May 18, 2012, 5:01 pm (UTC)

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Science

Human beings are currently at the top of food chains, whether it is plant-based (for vegetarian diets) or meat based (for non-vegetarian diets). We should be concerned with the constraints faced by...

Latest answer posted November 27, 2015, 4:26 am (UTC)

1 educator answer

Science

There are multiple steps involved in the treatment of waste water to return it to its pristine, usable quality as fresh water. I will list a few of them here, you can consult the resource I have...

Latest answer posted June 25, 2012, 1:05 pm (UTC)

1 educator answer

Science

Pygeum is a treatment for benign prostatic hypertrophy (BPH). In other words, this is a treatment for prostate gland hypertrophy (increase in cells or cell size) that is not cancerous. BPH can...

Latest answer posted January 10, 2016, 6:05 pm (UTC)

1 educator answer

Science

Actually, chemical weathering is what caused the Karst topography to be present in the first place. Karst topography is defined by features that result from the dissolving of certain minerals from...

Latest answer posted March 24, 2013, 8:38 pm (UTC)

1 educator answer

Science

Your reference organic molecule is showing one double bond between the two carbon atoms. Because of this double bond the compound is considered to be unsaturated - meaning it could contain more...

Latest answer posted December 26, 2010, 9:06 am (UTC)

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Science

The second trimester of pregnancy (the fourth, fifth, and sixth months) may be best described as the time when the fetus really begins to look like what we think of as a baby. During the first...

Latest answer posted June 8, 2016, 11:15 am (UTC)

1 educator answer

Science

A machine that is used to seal pieces of plastic material using heat is called a heat sealer. There are two main types of heat sealers: Impulse Heat Sealers: Impulse heat sealers use a pulse of...

Latest answer posted May 11, 2016, 12:19 am (UTC)

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Science

The law of multiple proportions states that for a given chemical compound made up of multiple elements, the elements will combine with fixed ratios of whole numbers. This is denoted in a...

Latest answer posted October 9, 2012, 2:46 am (UTC)

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Science

There was a researcher named Larry Kusche from the University of Arizona who wrote a book named Bermuda Triangle: Mystery Solved. Through his extensive research he found that most of the things...

Latest answer posted May 14, 2010, 11:53 pm (UTC)

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Science

Osmotic pressure obeys the following formula: `Pi V = nRT` (sometimes the formula `Pi = iMRT` is also used where i is referred to as the van't Hoff factor, a dimensionless constant assumed to be...

Latest answer posted May 15, 2013, 12:17 pm (UTC)

1 educator answer

Science

The power station burns coal at 45.5 tonnes per hour and it is assumed that the coal is pure carbon and that all of the coal is oxidized completely to carbon dioxide gas on combustion. The...

Latest answer posted January 8, 2012, 8:33 pm (UTC)

1 educator answer

Science

It sounds as though you are doing what is called an energy audit - a review of how much energy you use. For everyday electrical devices you need to determine how much power they use and how many...

Latest answer posted June 10, 2010, 9:23 pm (UTC)

1 educator answer

Science

Since the temperature is constant we can use Boyle's law here. It says that when temperature is constant an ideal gas would have its pressure(P) inversely proportional to volume(V). In other...

Latest answer posted June 11, 2013, 6:00 pm (UTC)

1 educator answer

Science

Marshmallows are just actually made up of gelatin, sugar, salt, water, flavorings and/or corn syrup. Sometimes they add eggs in it. Usually, there are no artificial preservatives used in...

Latest answer posted June 26, 2013, 8:27 am (UTC)

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Science

The pufferfish is in the family Tetraodontidae. When these fish feel threatened or frightened, they are able to inflate themselves. The reason that they inflate themselves is to scare predators...

Latest answer posted June 21, 2010, 11:53 am (UTC)

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Science

Global warming is generally thought of as real. Is what scientists do not agree about is why global warming is occurring. Some scientists will say that global warming is a naturally occurring event...

Latest answer posted July 4, 2010, 2:42 pm (UTC)

3 educator answers

Science

When you speak of k-species, you are talking about r/k selection theory with r and k representing two ends of the offspring spectrum. R-type species choose quantity over quality. They produce a...

Latest answer posted January 9, 2013, 2:19 am (UTC)

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Science

The specified current in the problem text is the total current `I_T =10 A` shown in the figure. Because there are 3 components of the current (total, resistive and reactive), the voltage drop over...

Latest answer posted September 11, 2013, 5:15 am (UTC)

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Science

First, let's calculate the radius of the orbit of your ship, which is the distance between the ship and the center of the Death star. So it is the sum of the radius of the Death star and the...

Latest answer posted December 14, 2015, 4:02 am (UTC)

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Science

Necrotizing fasciitis, or soft-tissue gangrene, can be caused by a number of different bacteria. One of them, the bacteria Streptococcus pyogenes, is also called the "flesh-eating" bacteria. It...

Latest answer posted February 25, 2012, 5:56 am (UTC)

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Science

Neurons are nerve cells. They are found in eukaryotes, specifically multi-cellular organisms. They are found in animals. They are specialized to carry information quickly from one part of the...

Latest answer posted December 23, 2015, 3:59 pm (UTC)

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Science

Let's take a specific example, not with disease but with an injury that involves inflammation whether it is tendonitis or some kind of sprain, etc. Someone might take an anti-inflammatory whether...

Latest answer posted August 4, 2010, 7:56 pm (UTC)

2 educator answers

Science

Yes, your teeth can affect your heart. I have an example for you. Years ago I was told I had a heart murmur. A few years after that, at a routine dentist visit, I was asked if I had any heart...

Latest answer posted August 10, 2010, 3:48 am (UTC)

4 educator answers

Science

Assume the ball is thrown in a direction perpendicular to the horizontal. The ball reaches a maximum height of 98 m. If the initial speed at which the ball was thrown upwards is U, `0 - U^2 =...

Latest answer posted September 12, 2013, 5:57 am (UTC)

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Science

No units for the radius of circle are given. Let us assume that the units are centimeters or cm and hence the radius is 1 cm. The velocity of any body is given as the ratio of displacement to time...

Latest answer posted December 24, 2015, 8:51 am (UTC)

1 educator answer

Science

A half reaction equation is used to show either the oxidation or the reduction process in the equation. For the given example, hydrochloric acid dissociates as `HCl -> H^+ + Cl^-` . The...

Latest answer posted September 28, 2013, 6:14 am (UTC)

1 educator answer

Science

Just because the study didn't produce any significant benefits does not mean there aren't any. The best thing to do is try it (assuming your doctor says there is nothing wrong with you taking it),...

Latest answer posted March 3, 2012, 1:39 pm (UTC)

3 educator answers

Science

In nature, the function of bugs is to eat other bugs. So it makes sense that wasps could be used as a pesticide, just as people now use lady bugs to eat aphids. The biggest problem I see is the...

Latest answer posted March 1, 2012, 3:44 pm (UTC)

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Science

Holozoic nutrition is a type of heterotrophic nutrition. Autotrophic nutrition is where an organism can produce its own food, like plants with photosynthesis. Heterotrophic nutrition is where an...

Latest answer posted October 7, 2013, 9:00 pm (UTC)

1 educator answer

Science

Hello! I suppose we speak about falling near Earth's surface and that the air resistance is ignored (in practice, it cannot be ignored). Then the only force acting on a body is the gravity force....

Latest answer posted February 1, 2016, 5:01 pm (UTC)

1 educator answer

Science

This is one of those slippery slope issues. If we start out small, there may not be a lot of serious ethical issues. However, starting out small can lead to more genetic meddling in the future,...

Latest answer posted February 28, 2012, 12:14 pm (UTC)

3 educator answers

Science

In the United States, most organic milk is UHT ultra pasteurized. Although it lasts longer, up to nine months unopened, it does not taste the same. It also does not require refrigeration. It can...

Latest answer posted February 24, 2012, 8:38 am (UTC)

2 educator answers

Science

Global warming is a serious threat to us and the scientific community is trying to study how this will affect the environment and our lives. One of the main areas of concern is its effect on our...

Latest answer posted April 10, 2016, 8:54 am (UTC)

1 educator answer

Science

Topography refers to the physical features of an area. This includes any areas with a steep gradient versus a flat, level land mass. Water flows from high to low altitudes due to force of gravity....

Latest answer posted October 28, 2015, 7:12 pm (UTC)

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Science

The acceleration of an object is simply the rate of change of velocity. It can also be written as, a = dv/dt = (v2 - v1)/(t2 - t1) here, a is the acceleration of the object, v1 and v2 are its...

Latest answer posted January 26, 2016, 1:39 am (UTC)

1 educator answer

Science

Crude oil is composed of many different kinds of hydrocarbons, and can be broken down or refined to produce a wide spectrum of things. The main product of petroleum is gasoline. This is used to...

Latest answer posted July 25, 2016, 8:08 pm (UTC)

1 educator answer

Science

Science is derived from word scientia which means knowledge in Latin. In ancient Greek, episteme was a word for a type of knowledge. It has to do with the workings of natural things. Man has long...

Latest answer posted July 18, 2012, 3:32 pm (UTC)

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Science

Direct current was first used commercially by Thomas Edison to power his newly invented light bulb. The limiting factor was it was not able to be sent very far away from the generating facility....

Latest answer posted July 28, 2012, 5:49 pm (UTC)

1 educator answer

Science

Hello! Theoretically, the answer is no, you cannot see such an object in water. It would be no refraction of light between such plastic and water. Refraction occurs when an inclined ray approaches...

Latest answer posted August 12, 2016, 4:43 pm (UTC)

1 educator answer

Science

This question almost certainly refers to the boundaries between lithospheric plates, also called tectonic plates. The outermost, solid part of the Earth is called the lithosphere. Large regions of...

Latest answer posted January 27, 2018, 7:38 am (UTC)

1 educator answer

Science

Density is the ratio of mass to the volume of a body, thus in current case: Mass = 200.0 gm Volume = 50 cm^3 Density = mass/volume = 200.0/50 = 4 g/cm^3 In case of multiplication or division, the...

Latest answer posted September 1, 2015, 11:23 pm (UTC)

1 educator answer

Science

This question can be answered in a variety of ways, so I'd like to briefly highlight some of those various pathways for this answer. Animals see humans exactly the way that you see humans because...

Latest answer posted February 7, 2020, 1:04 am (UTC)

1 educator answer

Science

What a cool question! I am sorry to disappoint you, but neurologists and sleep specialists aren't entirely sure why we dream. As a physical process or bodily function, it is hard to say precisely...

Latest answer posted May 4, 2016, 4:25 pm (UTC)

1 educator answer

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