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.
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
"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...
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...
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...
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...
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...
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...
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??
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?
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...
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?
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...
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. ??
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...
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...
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...
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
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...
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...
[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...
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...
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...
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...
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...
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...
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...
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...
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...
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
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...
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...