Science

Refine Search

How many city blocks equal one mile?

In order to determine how many blocks are in a mile, it is necessary to know the average size of a block in the city in question. Urban planners suggest that pedestrian friendly blocks are 300 to 600 feet long. A mile is 5,280 feet. Using the mean of 450 feet from the recommended 300 to 600 feet range, a mile would be 11.73 blocks.\nLength of blocks varies greatly, however. In New York, for instance, a the average city block is about 750 feet in long, while in Philadelphia the average city block is 400 to 500 feet long, and in Portland, Ore., the average block is only about 200 feet long.\nSo ..

Continue Reading

What is seismology?

Seismic waves are caused by the sudden breaking or cracking of rocks beneath the Earth's surface. Tectonic plates are constantly moving, though slowly, and cause earthquakes when they collide or rub against each other. The subsequent waves of energy move through the Earth and are recorded on seismographs. Earthquakes occur every day but are often too small to be felt by humans. Earthquakes produce two main types of waves, known as body waves and surface waves, which move differently through the Earth.

Continue Reading

What is the function of the labium minora?

A part of the female genitalia, the labia minora are two folds of soft tissue that are folded lengthwise on either side of the vaginal canal. Comprised mainly of connective tissue, they are also richly supplied with blood vessels, according to Inner Body. The labia minora are pinkish in color. They merge towards the back of the vulva, near the anus, and they extend forward to converge over the clitoris, forming a hood-like structure.\nThe labia minora are just one of several parts of the external female reproductive anatomy. The labia majora, found outside of the labia minora, help protect the..

Continue Reading

What are the different stages of rigor mortis?

On average, during rigor mortis, within zero to eight hours, the body starts to stiffen, but is still able to be moved, according to Education Portal. Eight to 12 hours after death, muscles become stiff and stay stiff for up to 24 hours from the time of death. Between 24 and 36 hours after death, the stiffness of muscles begins to decrease, and the muscles are more flexible.

Continue Reading

How long does hurricane season last?

A hurricane is defined as a tropical cyclone containing winds of at least 64 knots, or 74 miles per hour. While the official length of hurricane season has remained the same over the past few years, during the last couple of decades, big storms have been coming earlier. Although climate change has not been labeled as a cause, the dominant view among climatologists is that warmer ocean temperatures have resulted from increases in atmospheric greenhouse gases.

Continue Reading

What is the size of Uranus?

Uranus has 27 moons and faint rings. It is unable to support life and has an atmosphere of mostly helium and hydrogen with a scant amount of methane. More than 80 percent of Uranus' mass is made up of icy materials, including water, methane, and ammonia. It rotates east to west, like Venus, which is called retrograde rotation. It spins horizontally and rotates on its side. Uranus takes 84.3 Earth years to orbit the sun.

Continue Reading

What are the different kinds of motion?

Motion is movement, and it can also be defined as a continuous change in the position of an object along a specific vector. Each type of motion is controlled by a different type of force.\nThere are two types of basic motion. Translation means motion along a path and is defined by the net force (the sum of different forces) acting on an object, while rotation means motion around a fixed axis and is defined by torque (force that causes the rotation of an object).\nMany mechanisms take one type of input motion and output it as a different type of motion. For example, a chain and sprocket changes..

Continue Reading

How can decay caused by microorganisms be both helpful and harmful?

The University of Minnesota notes that dry-rot is the onset of microcellular decay. These organisms are known as brown-rot fungi, and they cause decay in living trees and wooden structures used by man. There is also a correlation between wood loss and the spreading of diseases, especially in urban areas.\nThe Scientist notes that good bacteria living at the root level has a beneficial impact on plant growth. Negative bacteria, however, hampers plant growth.\nAccording to WebMD, bacteria in the mouth breaks down teeth, which causes such problems as gum disease and toothache. Tooth decay is also..

Continue Reading

What is the internal resistance of a cell?

Batteries are not perfect circuits. Battery manufacturers build an internal resistor into them for a reason. This internal resistor regulates the output of the battery so that it can supply the desired amount of energy for a particular use. The measured output of a battery, be it DC load or AC conductance, is the energy of the cell minus the amount of resistance it must travel through. Energy is put into the circuit by the cell, but then some of this energy is taken out of the circuit by the internal resistor, in the form of heat, before it reaches the battery's output. This process is wh..

Continue Reading

What molecule carries amino acids to the ribosomes?

The production of proteins in the body involves two stages: transcription and translation. Transcription is the process of transporting genetic information contained within the deoxyribonucleic acid or DNA to the protein/RNA complexes called ribosomes. Translation entails the interpretation of the transcribed information to build specific proteins. The three major types of RNA molecules that serve as the driving forces in protein synthesis include the messenger RNA or mRNA, ribosomal RNA or rRNA and tRNA.Transcription begins in the formation of mRNA. RNA polymerase enzymes replicate one strand..

Continue Reading
Showing 1501 to 1510 of 10000 (1000 Pages)