How Do Fire Pumps Work?

Fire pump systems contain a sensor which monitors the water pressure in the sprinkler pipes. When the sensor detects a small drop in the water pressure which is not enough to indicate a sprinkler was activated, it will start the jockey pump in order to drive the pressure up to the required standard. If a larger pressure drop is detected, and the jockey pump can’t keep the correct pressure, the main fire pump automatically starts up and feeds water under high pressure into the system.

Photo Credit:

morristownsprinkler.com link

Further Reading:

when is a fire pump required? – http://www.ehow.com/facts_7719685_fire-pump-required.html

How Does Exercise Help the Skeletal System?

Exercise helps the skeletal system by increasing bone density and building on bone strength. Target activities light muscle training exercises and weight lifting exercise are some of the best ways through which bone mass can be developed. Without regular exercise, the skeletal system will suffer from bone loss over time and the result of this can be diseases like arthritis.

Photo Credit:

healthtap.com link

Further Reading:

How does exercise help the skeletal system? – http://wiki.answers.com/Q/How_does_exercise_help_the_skeletal_system

How Does Hormone Adrenaline Affect the Body?

The hormone adrenaline affects the body by increasing the heart-rate, and other effects such as flight response. Adrenaline is normally produced by the body when performing stressful or exhilarating tasks or when in danger of some sort. Adrenaline is also used as an anaphylactic shock when a person exhibits an allergic reaction that is severe.

Photo Credit:

dtc.ucsf.edu link

Further Reading:

what body parts does adrenaline affect? – http://www.ehow.com/list_6864054_body-parts-adrenaline-affect_.html?ref=Track2&amp%3Butm_source=ask

How Do Fabric Softeners Reduce Static Electricity?

Static electricity easily builds up on fiber while washing. Adding fabric softeners lessen the friction between fiber threads. Some are also infused with anti-static formulas for fabrics that have high static tendencies.

Reference:

www.bigsiteofamazingfacts.com

Photo Credit:

grade9static.wikispaces.com source

Further Reading:

How does fabric softener reduce static electricity? – http://wiki.answers.com/Q/How_does_fabric_softener_reduce_static_electricity

How do Get a List of Doctors in My Area?

The best way to find a list of doctors and GPs in your area is to visit the NHS website. You can also contact the NHS via mail or phone. This section of their website can be accessed at: http://www.nhs.uk/servicedirectories/Pages/ServiceSearch.aspx?WT.mc_id=51107

Photo Credit:

www.cancer.gov source

Further Reading:

How to Find a Doctor in my Area? – http://answers.ask.com/Health/Other/how_to_find_a_doctor_in_my_area

Effects of Exercise on the Skeletal System?

JedJuggles

Exercise helps to prevent and relieve arthritis (which inhibits movement due to pain and inflammation) in the skeletal system. Exercise also strengthens muscles and increases flexibility and this in turn takes excess pressure off joints. More so, regular exercise improves the density and strength of bones and this helps to reduce the likelihood of fractures especially as people age.

Photo Credit:

www.livestrong.com source

Further Reading:

What are the effect of exercise on the skeletal system? – http://wiki.answers.com/Q/What+effect+does+exercise+have+on+the+muscles+and+the+skeletal+system

How Does HIV Attack the Immune System?

HIV attacks the immune system by attaching itself to a T cell. Once that happens, it enters the cell and begins to multiply. That leads to the T cell being destroyed and the more the T cells are destroyed, the weaker the immune system becomes.

Reference:

www.aidsvancouver.org

Photo Credit:

humanbody.global2.vic.edu.au source

Further Reading:

How does HIV Attack the Immune System? – http://answers.ask.com/Health/Diseases/how_does_hiv_attack_the_immune_system