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What are ligtning rods?
Invented by Ben Franklin lighting rods are just what they sound like they are rods on a roof to take lighting instead of it hitting a house and burning it down.
Who controlled California in 1840?
The Spanish controlled California in 1840. They built a lot of missions there and used them for more than just religious reason. The missions operated sort of like economic centers, and the Spanish also used them to keep political control.
What is indirect light?
Indirect lighting is a light fixture that has been concealed. They are not always easily accessible like a light bulb is.
What did the electric lighting service increase in the late 1800s?
Industrial growth just like the telephone service did
What are some of the methods used by white southerners to keep free African Americans?
It was done by lighting places like homes and churches on fire, lynching people, and shooting them.
Why is the fan not working in heating mode whereas it works in cooling mode?
Sounds like a bad switch or solenoid.
Why should you not flicker the lights?
It may cause damage to the circuit to be repeatedly used like that. Sort of like heating and cooling an iron pan.
How does unequal heating and cooling of the earth's surface cause severe weather events like tornadoes and hurricanes?
Uneven heating and cooling causes differences in air pressure. To maintain equal pressure, a breeze picks up. These winds can be a strong as a tornado or just a gentle breeze.
Yellow light symbol that looks like a tank with a wheel on the top?
Shows that there are errors present in the Heating/Cooling control unit.
Why heating isn't working even though we have replaced the thermostat?
sounds like the heater core is out or you have an air bubble in the cooling system
Do any businesses use single phase power?
Single phase power is good for small loads like lighting fixtures and heating devices.
A sweet odor in your car?
this sweet smell sounds like you have an antifreeze leak in your heating/cooling system. most of the time it is the heater core
Geothermal pumps can be used for heating or cooling?
Geothermal (ground source) heating systems are a very rapidly growing technology in the residential / commercial heating and cooling market. Even though it does cost a little bit more in the beginning to install rather than traditional HVAC system it repays itself quickly because of its low maintenance cost. Ground source heat pumps can be applied to a wide range of both domestic and commercial applications, ranging from heating a small residential property with a swimming pool to heating and cooling a large commercial building like a hotel. True
What is the average cost of the household appliances?
On average an household will spend about 50% on heating and cooling bills, 25% on lighting appliances and the reminder is split between various appliances like washing machine, dryer, TV etc. The average cost for a family of four is around $270 a month.
Why human body does not expands and contracts on heeting and cooling?
The human body does not expand and contract with heating and cooling like water, Because the body usually maintains a constant internal temp (By sweating, teeth chattering, etc.)
What is the common substance which can be easily changed from one state to another state by heating or cooling?
That's true of most substances around us, like air, iron, plastics, glass, and rocks.The most common is probably water .
What was like in the 1800s?
what is it like in the 1840's
