Essays Tagged: "per second"

HDTV

body else watch them. Today in America our current broadcast standard is a 525 line/60 field per second based system called the NTSC (National Television systems Committee) . This committee was ... TV's general manager then stated, 'With advanced digital high-definition television, viewers will experience unmatched picture quality and superior sound resolution.' There are many pro's and c ...

(3 pages) 72 1 3.2 Jun/1996

Subjects: Science Essays > Technology

A resistance Investigation

ble is changed. Are shorter, fatter wires or longer, thinner wires best for transferring the energy per second in the context of designing a heating element?Investigation 1) To find out how the length ... Resistance:I think that the variables of the resistance are: The wire lengthThe wire diameterThe temperatureThe material of wireThe wire diameter affects the resistance because the area within the wir ...

(24 pages) 176 2 4.2 Apr/2002

Subjects: Science Essays > Physics

basic essay on computers from pc to mainframe with case study on networking

alan hamilton 1998From Desktop to super computerToday's desktop personal computers, or PCs, are many times more powerful than the huge, ... more powerful than the huge, million-dollar business computers of the 1960s and 1970s. Most PCs can perform from 16 to 66 million operations per second, and some can even perform more than 100 million ... even perform more than 100 million. These computers are used not only for household management and personal entertainment, but also for most of the automated tasks required by small businesses, inclu ...

(6 pages) 275 0 4.2 Apr/2002

Subjects: Science Essays > Technology

ISDN vs. Cable modems

highlightedthe limited Internet access speeds available to residential users. Even at 28.8Kilobits per second (Kbps)--the fastest residential access commonlyavailable at the time of this writing--the ... idential Internet access, each introduced in the spring of1994:· Continental Cablevision and Performance Systems International (PSI)jointly developed PSICable, an Internet access service deploy ...

(11 pages) 217 0 4.7 Aug/1996

Subjects: Science Essays > Technology

The Effect of Speed of Word Presentation on the Primacy and Recency Effect in Free Recall: A report done for an experimental psychology class

of Word Presentation on the Primacy and Recency Effect in Free RecallAbstractThe purpose of this experiment was to replicate the free recall experiment done by Murdock (1962). The experiment included ... resented ant a rate of one word every two seconds, while list 2 was presented at a rate of one word per second. There were 18 subjects used in this experiment. A dependent measures t-test was used and ...

(7 pages) 67 0 4.5 Dec/2002

Subjects: Social Science Essays > Psychology

What is a black hole?

the closer you are, the higher the escape velocity. The Earth's escape velocity is 11.2 kilometers per second (about 25,000 m.p.h.), while the Moon's is only 2.4 kilometers per second (about 5300 m.p ... e, this distortion of space is extremely severe and causes black holes to have some very strange properties. In particular, a black hole has something called an 'event horizon.' This is a spherical su ...

(3 pages) 89 2 3.9 May/2003

Subjects: Science Essays > Astronomy

Do Cell Phones Cause Health Risks? Radiation's Effects on the Human Body.

ehind cell phone risk. Numerous companies, including the United States Government, have conducted experiments dealing with the dangers of this type of radiation, and the results of these tests usually ... uency or RF (US FDA, 1), and is expressed in a unit called a hertz (HZ), which is equal to one wave per second. More commonly, RF is measured by means of its power density, or the power per unit area, ...

(6 pages) 194 2 4.6 Mar/2004

Subjects: Social Science Essays

The sun

s. One flare can be the size of a sunspot or the size of a whole sunspot group. It usually has a temperature similar to that of the sun's photosphere. The amount of time it takes for a flare to last v ... an last up to one full hour. The energy released during a flare is normally equivalent to 1027 ergs per second. Large flares can release up to 1023 ergs of energy, which is 10 million times greater th ...

(2 pages) 65 0 3.0 Apr/2004

Subjects: Science Essays

Brief Overview on the Physics of Music

eardrum. The subsequent physical and neurological processing and interpretation, give rise to the experience called sound. Most sound that people recognize as "musical" is dominated by periodic or reg ... d that people recognize as "musical" is dominated by periodic or regular vibrations rather than non-periodic ones (called a definite pitch and we refer to the transmission mechanism as a "sound wave". ...

(2 pages) 41 0 5.0 May/2004

Subjects: Science Essays > Physics

A lab report of an object in freefall and the effects of gravity.

d with a meter stick next to it. While the ball was dropped, a strobe light was flashing 3000 times per second, which created measurable points of the balls descent. Then we did a few different graphs ... y against a black background2. Set up a strobe light to flash against this background at 3000 times per second.3. Focus a camera to take in the entire length of the meter stick to ensure that the ball ...

(3 pages) 32 0 3.0 Oct/2005

Subjects: Science Essays > Physics

Explaining sound: Subject:s cience, acoustics

ster it vibrates and the higher the pitch. Frequency is measured in Hertz (the number of vibrations per second). Humans are typically sensitive to frequencies between 20 and 20,000 hertz (20hz-20khz). ...

(1 pages) 22 0 3.0 Dec/2005

Subjects: Science Essays

Black Holes.

, or the point in the black hole where objects can no longer return to space, of 299,792,458 meters per second. They can be as tiny as the point of a pin or as massive as fifty billion times the mass ... formed, space around the event horizon. Last, is the static limit, or the boundary between the ergospere and the normal space.According to popular thought, there are three types of black holes - super ...

(4 pages) 39 1 2.3 Dec/2005

Subjects: Science Essays > Astronomy

A Breif History of the Hard Drive

ne hundred tracks for recording. The disk spun at 1200 RPMS, had a data transfer rate of 8800 bytes per second and a total capacity of five megabytes. The computer that contained the hard drive leased ... tal capacity of five megabytes. The computer that contained the hard drive leased for 3,200 dollars per month. IBM continued to release update versions of the drive through the 1950s. The IBM 353 and ...

(4 pages) 30 0 3.0 Mar/2006

Subjects: Science Essays > Computer Science

Ruby Throated Hummingbirds

eason people really call them hummingbirds is because their wings can beat up to seventy-five times per second, but a ruby throated-hummingbird can beat its wings up to 700 times per second, and there ... sects or the nectar, or honey-like sap, of flowers. The insects are caught on the wing from lookout perches or in and around the flowers. To extract the nectar, the bird inserts its long tube like ton ...

(3 pages) 27 0 3.0 Jun/2006

Subjects: Science Essays > Zoology

Measuring the Speed of Sound. Physical Science lab write-up.

ory by plugging in the accepted value of sound in air and the knowledge that sound travels two feet per second faster for every degree rise in temperature.The wavelength is computed with several equat ... s sound and when the sound reaches its loudest point, the wavelength has been found.To begin this experiment, first the diameter of the tube must be measured. The diameter is then plugged into the fol ...

(3 pages) 14 0 3.0 Feb/2007

Subjects: Science Essays > Physics

Reseach On Superconductors

ll to preform tasks from simple word processing. Transistors can carry out millions of instructions per second on a small and simple chip. Space shuttles, medical equipment, TVs & computers all us ... to develop information. However now with transistors, microprocessors are the main function of our personal computers.Silicon chips Most integrated circuits are based on a silicon chip. Silicon is a ...

(2 pages) 818 0 0.0 Sep/2001

Subjects: Science Essays > Chemistry

Ultaviolet Rays

um. It has wavelengths shorter than Visible light but longer than X-rays. It moves at 186,000 miles per second, the speed of light. The difference between ultraviolet rays and any other one is their w ... waves, which can burn your skin.Most of the waves are blocked by the Ozone layer, in the earth's upper atmosphere. The Ozone layer in the earth's upper atmosphere, as well as atmospheric oxygen and n ...

(2 pages) 14 0 0.0 Nov/2001

Subjects: Science Essays > Environmental Science

Computer Technology

ch as a battleship (Encarta Encyclopedia). Then in 1977, Apple was the first company to develop the personal computer, which was small enough to fit on a desk. Finally in the last twenty years computi ... ery eighteen months due to faster processors, which enable computers to do billions of calculations per second, and new storage devices that can hold entire libraries on a single device. Our everyday ...

(3 pages) 25 0 4.0 Feb/2002

Subjects: Businesss Research Papers