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Why is outer space dark?

The light created by all the stars in the universe is not enough to illuminate space. Stars are far enough apart from each other that the space between them appears dark. The universe is constantly expanding, meaning that every object in space is increasingly farther away from every other object. Because light wavelengths become longer when moving away from something, these light waves appear red from Earth or do not enter the visible spectrum if they are far enough away and are not visible at all.\nUntil the 20th century, people believed that the number of stars in the universe was infinite, ..

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How many electrons does phosphorus have?

Phosphorus is a nonmetal that is fairly reactive and usually shares electrons with other elements. This element is never found free in nature. Phosphorus is extremely poisonous and corrosive; it can spontaneously start burning when exposed to oxygen.\nA number of compounds contain an ion of phosphorus called phosphate, which consists of one atom of phosphorus and four atoms of oxygen. Phosphate ions are negatively charged and can combine with electropositive elements, such as calcium.

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How does the potential energy of an object change when its height is tripled?

Potential energy is equal to mgh, or mass multiplied by acceleration due to gravity multiplied by the height of the object. It exists whenever an object with mass holds a position above the ground. This form of energy is closely related to kinetic energy. As an object moves from one height to another, it will either gain or lose kinetic energy in order to conserve total energy. The equation for the conservation of total energy is potential energy plus kinetic energy.

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What are the two branches of the trachea?

The trachea is colloquially known as the windpipe because it is the anatomical structure that allows air to flow in and out of the lungs. It is a small tube that is less an inch in diameter and approximately four inches long. The trachea begins underneath the larynx and runs behind the sternum until it reaches the lungs. Here it branches into two bronchi which then enter the lungs and branch into more bronchi and eventually terminate into alveoli.

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What is the molecular weight of glycine?

Glycine is an organic compound that has a hydrogen side chain. It is the smallest amino acid of the 20 commonly found amino acids in proteins. As an amino acid, it can be formed from four codons: GCU, GGC, GGA and GGG. These four codons are part of the genetic code, and each causes glycine to be translated and inserted into a protein chain.

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What are the body parts of the octopus?

Inside the mantle, most octopuses have a brain, a digestive gland, salivary glands, gonads, a kidney, an anus, an ink sac, a funnel and three hearts. Some species of octopus have vestigial shells inside their mantles, although octopuses generally do not have bones or skeletons of any kind. Octopuses have eyes very similar to human eyes and have excellent vision that helps them target and hunt their prey. The rows of suckers on their muscular arms enable octopuses to move easily across the ocean floor and hang on tightly to their next meal. If an octopus needs to move quickly, it can take in wa..

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What is a silent mutation?

Silent mutations, also called synonymous mutations, have long been thought to be a benign process because no changes occur in the amino acid sequence, resulting in the production of the normal protein. Recent studies, however, show that even though the protein remains the same, silent mutations can cause changes in the shape of mRNA, resulting in the interruption of its interaction with ribosomes. This interruption can cause a decrease in the production of the protein as well as a change in its shape, causing it to work improperly, states the FDA.\nScientists are now able to use the presence o..

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Abduction takes place around which axis?

Abduction opposes adduction. Adduction is the movement of an object toward the midline of the body and also occurs in the frontal plane of the body around the sagittal axis. Both abduction and adduction are anatomical terms used in the medical field to describe the movement of limbs or muscles. There are specific muscles in the body, known as abductors and adductors, that are responsible for abductive and adductive movements.

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How many Earth-sized planets can you fit inside the red spot on Jupiter?

The Great Red Spot is the most powerful storm in the solar system. It is thought to have been first observed by the astronomer Cassini, who described the storm as early as 1665. Observations of the storm over the centuries have revealed that it is gradually losing strength and shrinking, having lost more than half its size since the late 1800s.

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How do pigs reproduce?

Pigs have considerable reproductive potential according to Mississippi State University. Wild pigs become sexually mature around six months of age, and they produce a litter size between three and eight piglets. Female pigs can give birth twice a year. Young female hogs go into heat when it is time for them to mate. According to Mother Earth News, in domestic mating on farms, male partners can mate with between 12 to 50 sows in stalls. The gestation period of sows is around 113 days.

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