Power-on hours (POH) is the length of time, usually in hours, that electrical power is applied to a device. A part of the S.M.A.R.T. attributes (originally known as IntelliSafe, before its introduction to the public domain on 12 May 1995, by the computer hardware and software company Compaq), It is used to predict drive failure, supported by manufacturers such as Samsung, Seagate, Toshiba, IBM (Hitachi), Fujitsu, Maxtor, Kingston and Western Digital. Power-on hours is intended to indicate a remaining lifetime prediction for hard drives and solid state drives, generally, "the total expected life-time of a hard disk is 5 years" or 43,800 hours of constant use. Once a drive has surpassed the 43,800 hour mark, it may no longer be classed as in "perfect condition". Google tested over 100,000 consumer grade serial and parallel ATA hard disks, finding evidence that S.M.A.R.T. attributes like POH played a heavy role in device failures. (Wikipedia).
What is a kilowatt hour (kWh) and how it is used to determine electricity usage
A kilowatt hour is a unit of energy that electricity companies use to determine your electrcity usage. This video discusses in plain language what a kilowatt hour is. Suitable for the physics student and even the lay person Support me on www.patreon.com/HighSchoolPhysicsExplained
From playlist Electricity and Magnetism
Physics - E&M: Ch 41.1 Ohm's Law & Resistor Circuit Understood (30 of 42) What is a Kilowatt Hour?
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain what is a kilowatt hour. A “kilowatt hour” is a unit of energy. It is the unit of energy the electric company charges. Next video in this series can be seen at: https://youtu.be/EFo4I-6MEL8
From playlist PHYSICS 41.3 OHM'S LAW AND RESISTORS UNDERSTOOD
Physics 13.3.3a - The Kilowatt hour
The kilowatt-hour, a unit for energy. Where the unit comes from and how it is used. From the Physics course by Derek Owens
From playlist Physics - Electric Circuits
This physics video provides a basic introduction into the kilowatt hour unit. It's a unit of energy and not power. Kw or kilowatt is the unit of power. Energy is power multiplied by time. The kilowatt (unit of power) multiplied by hours (unit of time) will you give you a unit of energy
From playlist New Physics Video Playlist
Finding the Cost to Power Light Bulbs (Example Problem) and Defining KiloWatt Hour
Here we test the money saving advice given on a package of energy efficient light bulbs. We also define KiloWatt Hour; a term that often confuses students. Oh, we also determine the resistance of the light bulbs, ya know, just because we can. 0:00 Intro 0:19 The Advertisement on the Pac
From playlist All of AP Physics C: Electricity & Magnetism!
Explanation of how kilowatt-hour meters work (electromechanical)
I take apart an electromechanical power meter and describe how it uses magnetic fields to measure power consumed. The voltage coil's numerous turns of wire already provide some phase shift -- the copper ring adds additional shift to bring the total up to 90 degrees.
From playlist Electronics
Energy, Work & Power (24 of 31) Power, An Explanation
Gives an explanation of what power is in physics. Includes a explanation of horsepower and one worked example. Power is the rate a which work is done. Also stated as how fast work is done. Power is calculated as the amount of work done divided by the time it takes to do the specified amo
From playlist Kinetic Energy, Potential Energy, Work, Power
🔋 Battery amp-hour, watt-hour and C rating tutorial
A guide to battery capacity measurement including amp-hours, watt-hours, C ratings and more. Website: http://www.afrotechmods.com/ The Amp Hour podcast: http://www.theamphour.com/
From playlist All about batteries
Energy, Work & Power (31 of 31) Power Output When Doing a Chin-Up or Pull-Up
Shows how to calculate the power output of a person when they do a chin-up or pull-up. Worked example. Power is the rate a which work is done. Also stated as how fast work is done. Power is calculated as the amount of work done divided by the time it takes to do the specified amount of w
From playlist Kinetic Energy, Potential Energy, Work, Power
This video explains the relationship between electrical power and electrical energy and uses the relationship (and others) to derive and use an equation relating power to current and electrical potential difference. You can find more information that supports this video on our website:
From playlist Electric Circuits
EEVblog #1009 - Voltage vs Power vs Energy
Fundamentals video explaining the difference between voltage, power, and energy. The difference between Power & Energy is probably the most misunderstood and misused terminology in engineering! DC Fundamentals Playlist: https://www.youtube.com/playlist?list=PLvOlSehNtuHtVLq2MDPIz82BWMIZcu
From playlist Electronics Tutorial - DC Fundamentals
Battery Capacity - Amp-Hours, mAh, and Watt-Hours
This video tutorial discusses the basics of battery capacity - specifically energy capacity and charge capacity. Charge capacity is typically reported in Amp-Hours (Ah) or mAh. Energy capacity is usually reported in Watt-Hours or Wh. My Website: https://www.video-tutor.net Patreon Dona
From playlist New Physics Video Playlist
EEVblog #945 - Thermal Powered Smartwatches Are GIMMICKS!
Thermal powered smartwates are nothing more than gimmicks. Dave runs the numbers on the Matrix Powerwatch from Indieigogo. Also some exercise testing shows up an unusual and undesired effect when using thermoelectric generators on your wrist. Thunderf00t's video: https://www.youtube.com/w
From playlist Debunking
PreCalculus - Exponential Function (5 of 13) Find Bacteria Growth After 12 Hours
Visit http://ilectureonline.com for more math and science lectures! In this video I will find the number of bacteria after 12 hours if the culture doubles and triples hourly. Next video in the Exponential Function can be seen at: http://youtu.be/dNULxlTR1TY
From playlist Michel van Biezen: PRECALCULUS 1-5 - ALGEBRA REVIEW
In this video, we learn about and derive equations for electric power using Ohm's law. We explore the relationship between electric power, electric potential difference, electric current, and resistance. We also discuss the unit of kilowatt-hour and its connection to energy. Finally, we di
From playlist All of AP Physics C: Electricity & Magnetism!
Energy Use In Electrical Appliances | Energy | Physics | FuseSchool
Do you ever have arguments at home about leaving appliances on and wasting electricity? In this video we are going to look at measuring energy use, in electrical appliances. The unit of energy is the Joule (J). However, when dealing with electricity, we actually use Watts (W). A Watt is
From playlist PHYSICS: Energy
EEVblog #724 - Home Solar Power System Analysis & Update
Dave looks at his 3kW home solar power system after being in operation for 18 months and analyses the results. Original video: https://www.youtube.com/watch?v=VGENVguQQmo Timelapse install video: https://www.youtube.com/watch?v=fQAd7nposJQ How much energy was produced? How does net and gro
From playlist Solar Power Systems