Science


Refine Search

What is the difference between warm-blooded and cold-blooded animals?

To generate heat, warm-blooded animals turn the energy of food into warmth. To keep a constant temperature, they have to eat much more food that their cold-blooded counterparts. Much of the energy from those calories goes directly to providing warmth. When warm-blooded animals get too warm, they pant or sweat to allow evaporation to take away excess heat, and they also reduce their temperature by entering water or finding shade. Heat is generated through their long coats. Shivering and other instinctive responses also generate heat.\nCold-blooded animals get hot when their surroundings are war..

How much does a yard of river rock weigh?

The yardage is calculated by multiplying the length by the width in feet times the desired depth in inches. The product is divided by 324 to determine cubic yards. For example, 6 feet times 10 feet times 3 inches equals 60 square feet; 60 divided by 324 equals 0.54 cubic yards, or the equivalent of one scoop from a skid loader. River rock comes in a variety of sizes and colorations and is useful for many projects, such as landscape beds, dog runs, patios, driveways, walks and water features.

What role do bile salts play in the digestion of fat?

According to Colorado State University, bile salts are generated in the liver, where they are released along with several waste products into the gallbladder. The gallbladder, in turn, removes a significant amount of water from the bile mixture before secreting it during digestion. The bile enters through the biliary ducts into the small intestine. In addition to allowing the body to digest fat, the bile salts also carry waste cholesterol, which is otherwise highly insoluble in water.\nColorado State University explains that the structure of a bile salt has both hydrophilic and hydrophobic end..

When did Sheila Jackson Lee photograph the Mars Rover?

Representative Lee was apparently unaware of the fact that Neil Armstrong had planted a flag on the moon, not Mars. As of 2014, she is the Democratic congresswoman that represents the 18th district of Texas. She was first elected to office in 1994. During her tenure in Congress, opponents have accused her of having a volatile temper and an "entitlement mentality."

What is the formula for bromine gas?

The chemical formula of a substance does not depend on its state of matter. Bromine is typically a reddish brown liquid at standard temperature and pressure, but it easily evaporates into an amber-colored gas, even at normal room temperature. Its chemical properties are similar to other halogens such as chlorine and iodine. Human exposure to bromine gas is typically fatal, which is why special care should be taken when manipulating this highly toxic substance.

What is the definition of pH paper?

Litmus paper is often used to differentiate an acid from a base. When pH is less than 4.5, the paper turns red. This indicates that the substance is an acid. If pH is greater than 8.3, the paper turns blue, indicating that the substance is a base. In neutral conditions, pH paper is a purple color. The exact pH of a substance can be determined with a pH meter.

How might a person use the chemical compound sodium bicarbonate in the home?

Sodium bicarbonate acts as a leavening agent by reacting with the acidic components in batter, releasing carbon dioxide and causing the batter to expand. Ancient Egyptians used it as a cleaning agent as well. In addition, the novel "Captains Courageous" by Rudyard Kipling mentions its extensive use during the 1800s in commercial fishing to prevent freshly caught fish from spoiling. \nSodium bicarbonate is naturally found dissolved in mineral springs. It is also produced in pure form from sodium carbonate, water and carbon dioxide or by reacting carbon dioxide with an aqueous solution of sodium..

How can you raise your testosterone?

Even though testosterone replacement therapy is often the answer to low testosterone production, MayoClinic warns that it may result in breast enlargement, acne, an increased risk of having a heart attack or pulmonary embolism, limited sperm production, and testicle shrinkage. For men who do not want to take those risks, Healthline states that there are multiple ways to boost testosterone levels naturally.\nIf a man is overweight or sedentary, a combination of weight loss and exercise may raise his testosterone levels. Healthline recommends supplementing the diet with more beans and nuts to bo..

What color is carbon in a flame test?

The amount of oxygen reaching the carbon also affects the flame color, with more oxygen leading to a cooler yellow flame. Combustion reactions, such as the one used to produce a flame in the flame test, already involve the combustion of carbon, so the color produced during a carbon flame test is very similar to the color of the flame itself.

What causes a short circuit?

A short circuit exists when positive and negative terminals of a current connect on a low-resistance conductor. This contact causes more electrical energy to be produced within a short time. Since a short circuit can lead to unintentional fires, electrical devices are installed with fuses or circuit breakers to prevent the surge of destructive electrical energy.

Showing 9861 to 9870 of 10000 (1000 Pages)