Watts Definition and 143 Threads

Watts is a neighborhood in southern Los Angeles, California. It is located within the South Los Angeles region, bordering the cities of Lynwood and South Gate to the east and southeast, respectively, and the unincorporated community of Willowbrook to the south.
Founded in the late nineteenth century as a ranching community, the arrival of the railroads and the construction of Watts Station saw the rapid development of Watts as an independent city, but in 1926 was consolidated with Los Angeles. By the 1940s, Watts transformed into a primarily working class African-American neighborhood, but from the 1960s developed a reputation as a low-income, high-crime area, following the Watts riots and the increasing influence of street gangs. Watts has become a predominantly Hispanic neighborhood with a significant African American minority, and remains one of the most impoverished neighborhoods in Los Angeles despite falling crime rates since the 1990s. Notable civic activities by residents of Watts include the "Toys for Watts" toy drive, the Watts Christmas parade, and the "Watts Summer Games" athletic tournament, as well as a local theatre and a dance company, in an effort to improve the neighborhood.Watts is noted internationally for the landmark Watts Towers by Simon Rodia, which are a Los Angeles Historic-Cultural Monument and also listed on the National Register of Historic Places. The neighborhood has also been featured or referenced in numerous forms of media, particularly West Coast hip-hop music, and movies and television shows set in Los Angeles.

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  1. steves1080

    How many Watts do I need to heat this pipe?

    Reference attached image. In this simple system, I have a large reservoir of water that feeds a small section of 4" dia. pipe. There is about 1 ft of length until there is a gate valve to isolate the flow. When not flowing water, this 1-ft x 4-in section is at risk of freezing when...
  2. W

    Power and Speed Relationship for Lifting Objects

    Homework Statement The maximum power your body can deliver in lifting an object vertically is 78 W. How fast could you lift, at constant speed, a 2L full water container? P=78W m=2kg t=? v=? Homework Equations P=ΔE/t E=1/2mv2 The Attempt at a Solution 78W=(.5*m*v2)/t...
  3. A

    Change in watts and power dissipated

    One of my homework questions is giving me trouble: "In, the US, the rms voltage from power outlets (known as line voltage) is 120 V. In the United Kingdom, line voltage is 230 V. If you take a lamp with a standard 100 W incandescent light bulb from the US, how much power will it dissipate if...
  4. marcophys

    Gravity is std. therefore can we rate a 'mass at height' by watts?

    For example... wind turbines are primarily listed by their wattage (1.5MW etc.) Presumably their output is varied according to rotational speed, so I'm guessing that the rating is simply a guide. However, for a given mass, at a given height; due to standard gravity, can we state that this...
  5. Sneakatone

    Find watts from rotational kinetic energy

    a)I used the equation KE=1/2Iw^2 I=mR^2 ---> 1.5x10^30*20000^2 w=2.1*2pi KE=1/2(1.5x10^30*20000^2)(2.1*2pi)^2=5.2x10^40 J t=2.1 rev/s / 1.4x10^-15 rev/s^2=1.5x10^15 seconds 5.2x10^40 J/1.5*10^15 seconds =3.4x10^25 watts B)1.15*10^15 s=1.1*10^18 years I feel like this method is...
  6. J

    What is the acoustic power output of a blue whale in Watts?

    I didn't think it would be this hard to find the answer to this, but 1 hour of googling has come up with nothing that I can make sense of. The main cause of my confusion is that there's about a dozen different ways of measuring sound power in decibels with different units or reference powers...
  7. J

    How to culculate rms current using Watts in a Household Curcuit

    Homework Statement Three lamps are connected in a household curcuit. Lamps 1 and 2 have 150W bulbs and lamp 3 has a 100W bulb. What is the Current (I) and Resistance (R) of each bulb? Homework Equations V=IR P = W/t = (V*q)t = V*I I= q/t V= W/q The Attempt at a Solution Lamp...
  8. N

    How do I calculate watts for household appliances?

    Hi, for a physics project we have to find the power usage of household appliances. My charger says "60W inputAC 100-240V 1.5A output 16.5-3.65V" Would the watts just be 60W? Or would I have to calculate the amount by using P=AMPsx120volts (provided by my teacher)? My other charger says...
  9. T

    The force of 9.8 Newtons. torque equated to watts

    Im makeing a hydro gravity genoratetor I need to no how much air to release to give 800w
  10. K

    Can a Peltier Work Against 315 Watts Heat Load? Graphs Inside!

    I'm planning to work on a water cooling device for physiotherapy using a peltier. For this, I should be able to cool 500 g of water at a temperature of 35°C to 18° C. This gives me a heat load of 315 Watts if I take time to be 3 mins. Is it possible for a peltier to work against such a...
  11. P

    What's more important amps,r watts or volts?

    Last night i did an experiment with a halogen bulb, rated at 12v 100w (8.33amps) dc. The exact model is this: http://inpcars.com/spotlights/motortrendmts43707-i.jpg I used to turn that bulb on, 3 serial batteries 1.5v "aaa" @ 0.4ah = 4.5 @ 0.4ah (1.8watts), and it turn on a little bit...
  12. Z

    Is the Calculated Current of 1.3 Amps Correct in a Parallel Circuit Problem?

    Homework Statement Homework Equations What is the current leaving the cell. The Attempt at a Solution Since all the resistors have the same drop in watts, I assumed both "sections" will lose drop 6V. So each side of the the parallel section drops 6V and the single resistor...
  13. C

    Finding the force on a shaft when given Watts - shaft design

    Homework Statement I think I did this right, but for some reason I am second guessing myself. I don't need help with the whole question, just this part: The question says "In this exercise, you will design and analyze a shaft and the bearings for use in a power transmission mechanism. You...
  14. A

    Gamma Ray Decay to potential watts

    I'm interested in calculating how much power (in Watts) could be produced (assuming a 100% conversion efficiency between Gamma Rays and electrical power) from gamma decay of a 60 Co -> 60 Ni. How long would this reaction last? Just a few seconds or longer? Are there any decays that last for a...
  15. S

    Can the force exerted by a perm magnet be equated to electro magnet watts?

    Hey guys, sorry if this is wrong place to post this. If it is let me and I will try and find the right place. It was the only category where I saw something about energy and physics. This is also probably a basic question but I hope you don't mind me asking. Let's say you have an electro...
  16. J

    How to convert AC Watts to DC Watts

    I do not work with this type of conversion so I am not familiar on how to understand so here is my problem I have a electrical supply line putting out DC current at .6 amps by 17 volts which equals 10.2 watts here is my question if I take a 125 volt AC bulb rated 10 watts will this be enough...
  17. S

    Air conditioner specs: watts vs Btu/hr

    Hello, I am confused about air conditioner Btu specs. When I try to match the power input in watts, to power out in Btu/hr, the numbers don't come out even close. Example: This 6000 Btu window unit has the following specs: Volts 115 Amps 5.4 So the power input in watts is: 115 x 5.4 = 621w...
  18. C

    Can I Replicate Watts WP5-50 Premier RO System? An Analysis

    "Watts WP5-50 Premier Five-Stage Manifold Reverse Osmosis Water Treatment System" sells for $170 on Amazon. Replacement filter kit for it sells for $30 - pretty cheap. Now, suppose I have got a low key electro-mechanical workshop and I want to go into business competing with Watts making...
  19. jaketodd

    Converting Watts, Distributed Over An Area, To Energy Density

    Is there a way to get energy density from watts, with the resultant energy density not involving time, as watts do? Thanks, Jake
  20. R

    Covert to Watts, Input and Output Values provided, Covert it to Watts

    I have this Sony Laptop, the adapter has the following specifications: These are the input and output values of laptop charger. 19.5V written in bold on top Input:100-240V~1.3A 50-60Hz Output: 19.5V---4.7A, the dotted line also has straight line above it, I don't know what's that symbol...
  21. T

    Heating 800 watts nichrome wire with a battery.

    hi guys.. I'm new here and this is my first post.. my friends told me that the title of this post is impossible and i need a car battery to heat the 800W nichrome wire, and i believe them.. they also said that AC will solve the problem.. but i need to use DC so i came up with using diodes.. the...
  22. R

    Is 500 Watts Typical for Toilet Motion Sensors? Experts Answer Ramone

    Dear Experts I come across a website showing specifications of a PIR motion sensor for toilets. I quote the specs : Type 180° Motion Sensor Application Toilet, WC, Bathrooms, Restroom, Cloakroom Technology Wall mount Passive Infrared PIR motion sensor Reach 10 meters Time...
  23. B

    Converting an electrical appliance with DC motor to AC watts

    Hi, I'm comparing two electrical appliances, one with a DC motor and the other with an AC motor. The AC appliance has 250 watts. The DC appliance has 0.6 amps and 120 volts, and its wattage is 72. Given these specs, I would like to know which appliance would have a more powerful motor? In...
  24. ckirmser

    Calculating Ship Thruster Accel (G) from Watts

    I'm working on a table for a SciFi RPG to construct ship thrusters. The thrusters have a certain output in watts and I need a formula to figure out how many Gs acceleration for a certain mass of ship can be gained by a certain wattage of energy. I'm working from; W = m * d^2 / t^3 Since...
  25. S

    Why do we call a zero watts bulb as it so?

    why do we call a zero watts bulb as it so?? a zero watts bulb is common in houses,commonly called as 'night lamp'.., if v say it as zero watts lamp., then is it conducts zero current or zero voltage? what is the power consumption by modern led lamps and by other fluorescent lamps??
  26. M

    Calculating Joules from Watts: 4000 Watts for 30 Seconds

    1 Watt = 1 Joule/Second So does that mean if I input 4000 watts for 30 seconds that will output 12000 Joules?
  27. G

    Yes, Determine Current From Watts

    Can you determine current given only the watts? Ex) if you have a lightbulb with 120 Watts, can you determine the current (charge) that flows through it in a second, for example?
  28. M

    Declared Net Capacity in Mega Watts Electrical

    If a nuke units has a DNC of 1000 MWe, is this capacity per sec, hour, day, or year? I'm "assuming" this capacity is per hour but then again a Watt is a unit of seconds. In other words, If a nuke unit has declared net capacity (DNC) of 1000 MWe, how long would the unit have to run at...
  29. J

    Measuring Watts on 24HP Electric Generator

    My friend has a 24 HP electric generator and wants to know the number of watts being delivered. My understanding is that the 24 HP refers to the power input to the generator and he wants to know the output power generated. Can someone tell me how to measure it?
  30. C

    Calculate Power Consumption: 600W Device at 220V to 160V | 1W Precision

    Homework Statement An electrical device consumes 600 W of power, when connected to 220 V voltage. Homework Equations Calculate the power consumption of the device, when it is connected in 160 V voltage. Give the answer in 1 W precision. The Attempt at a Solution I tried and found...
  31. B

    What is the required wattage to achieve a velocity of 300m/s with 1kg of mass?

    How many watts of power would it take to get a a mass of 1kg up to 300m/s? Leaving out friction, drag, etc.. Just how much power in watts to get 1kg to 300m/s. ??
  32. Z

    Understanding Wattage, Amps & Volts for a 1000w Light With Ballast

    I have a question about the power usage of a light with a ballast. If the light is rated as a 1000w light and must be run through a ballast. I believe the ballast is like a transformer, because I saw somewhere that the bulb runs at 300 volts. So since Watts = amps x volts, does the wattage...
  33. D

    Calculating Thermal Coefficient of a Resistor: Tips and Advice

    So I am an engineering student working on co-op and I ran into a problem. I have a resistor like the image above. I placed this resistor in free space, leads in vertical position (Ambient: 296K ) and I placed 10W of electrical power into it. What I need to find is the thermal coefficient...
  34. T

    Calculating Talk Time for a 1050mAh Mobile Phone Battery Pack

    Homework Statement A primary energy source is able to provide 0.7 Watts power in order to charge a mobile telephone battery pack. The telephone operates at 3.5 V, and the mobile telephone’s 3.5 V battery pack has a capacity of 1050mAh. In “talk” the mobile phone draws an average current...
  35. M

    Convert Watts to Watt-hours - Marianne

    I have a survey with data on electricity consumption per month in Watts. How can I convert the numbers into Watt-hours to compare it with another survey? Thank you very much for your help. Marianne
  36. C

    How Does Waste Heat from Nuclear Plants Affect River Temperatures?

    Homework Statement A nuclear power plant on the Connecticut River produces 2.00x10^2 megawatts of power, but also releases 1.00x10^11 kJ/day of waste heat into the river. assume that the average rate of flow of the river is 9.00x10^4 kg/s. a. What is the maximum temperature increase in the...
  37. L

    Here we go again Newtons and Watts

    Hi! So I thought I knew the laws of physics and electronics, but I've recently stumbled on to a puzzling bit of "Math vs Pratical application". I'm messing up the forces and equations in my strained little head, so I'll let you guys have a go. I'll go into practical applications of this...
  38. W

    Heat engine, how much power does it use in watts?

    [b]1.A heat engine is rejecting 200btu/h and 30% efficient, how much power does it use in watts? [b]2. QH=w+QC and power=energy/time (1kwh=3412btu) and a power diagram: QC= wasted heat, w=work QH l 30%l---->W l QC [b]3. 200btu/h(1kwh/3412btu)(1000w/1kw)=58.6watts...
  39. Monocerotis

    Calculating Power Usage for Devices

    Homework Statement The question asks for us to go around our house, figure out the power usage of different devices, based on the estimated time use of these devices and calculate the total power usage per month. Homework Equations Energy = Power X Time Power = kW Time = hours...
  40. A

    Mass + time + acceleration => watts

    Hello, this is my first real post here =) I'm working on an in-car-accelerometer that I want to display Torque, Horsepower and more.. I can do all the calculations when I calculate power, but here is the thing : Power(w) from acceleration(in m/s^2) I am not sure about. I plan to...
  41. seb7

    Maximizing PV Panel Output with MPPT and Microinverters

    Im wondering if its possible to 'pull' more watts out of PV solar panels as to charge batteries quicker. The maximum watts from the panels must depend on the load its given. So what if we find the optimum load draw, and create some kind of modified DC-DC converter which cleverly controls the...
  42. T

    How Much Power Does a Cheetah Generate During Acceleration?

    Homework Statement The cheetah is one of the fastest-accelerating animals, because it can go from rest to 3.4 m/s (about 8 mi/h) in 0.5 s. If its mass is 112 kg, determine the average power developed by the cheetah during the acceleration phase of its motion. Express your answer in watts and...
  43. C

    Refrigeration: The Equivalent Rate of Transport of Heat in Watts?

    A 1.2 ton air conditioner has the capacity to freeze 2400 lb of ice at 0°C in a day. What is the equivalent rate of transport of heat in watts? QH(out)= QL(in) + Wi Coefficient of Performance= QL/ (QH-QL) Coefficient of Performance of an Ideal System: TL/ (TH-TL) QL/QH= TL/TH I...
  44. T

    Can You Convert Watt-hr to Watts? Exploring the Mechanics of Energy Conversion

    Homework Statement An automobile gets 20 miles per gallon when traveling at 60 miles per hour. With the energy content of gasoline at 36,000 watt-hr per gallon, convert this amount of power into watts. Homework Equations W h (watt hours) | ([length]^2 [mass])/[time]^2 | energy W...
  45. T

    How can I convert watt-hrs per gallon to watts?

    I'm trying to figure out how to convert watt-hrs per gallon to watts. If anyone can help it would be much appreciated! Thanks. ^_^
  46. B

    Current in the curcuit from watts and volts

    Homework Statement A circuit has a 50 V battery, and 3 resistors. they are all 25 Watts, 1 is in series, 2 are parallel. Find the current of the circuit. Homework Equations V=IR P=IV The Attempt at a Solution I know how to do these fine when I'm given the resistances or the...
  47. W

    How to: compute Watts and Calories for for a bicycle, up a hill

    At 6'5", 300 lbs. and old as dirt, I am a walking and rolling testimate to F=ma. This part of my project is difficult for me, because I have never taken a physics class. All the examples I have in books and PF, deal mostly with force moving down a hill. I am trying to compute Watts and Calories...
  48. J

    Is current measured in Watts or kW?

    Homework Statement I'm using the following equation: Is Vs = Ip Vp Is the current measured in Watts or kW? Homework Equations n/a The Attempt at a Solution n/a
  49. E

    Average power consumption in watts

    Homework Statement (a) If you follow a diet of 2140 food calories per day (2140 kilocalories), what is your average power consumption in watts? (A food or "large" calorie is a unit of energy equal to 4.2*10^3 J; a regular or "small" calorie is equal to 4.2 J.) Note for comparison that the...
  50. B

    Using watts to help determine velocity?

    Here's what I know about an abstract object: *mass *position *all external forces acting upon it (gravity ;) *that it is exerting force upon itself *direction of said force *number of joules per second being used in said force (watts) Can I use these to determine the velocity of the...
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