Survey on Bicycle riding practices?

Hunta

I have to take a survey for my drivers ed class please help ty

Drivers
List five ways to prevent traffic conflicts with bicyclists.

Bicyclists list five safe bicycle riding practices.

Answer
Watch for bicycle riders turning in front of you without looking or signaling.

Allow plenty of room when passing a bicycle rider.

Watch out for bikes coming out from driveways or from behind parked cars or other obstructions.

Honk your horn briefly as a signal that you're going to pass if you are about to pass a bicycle on a narrow roadway.

Avoid passing between a bicyclist and oncoming vehicles on a two-lane road. Slow down and allow vehicles to pass. Then move to the left to allow plenty of room to pass the rider safely.


Maintain control of your bicycle.

Protect yourselfâReduce the risk of head injury by always wearing a helmet.

Be visible, alert, and communicate your intentions.

Ride with traffic.

Ride far enough away from parked vehicles to avoid being hit by an opening door...........

Physics of bicycle helmet?

Q. I really need help. I have a science assignment due this week about bicycle helmets and why they're used to help prevent injury. I have to design my own helmet and it has to explain about the distribution of force and why it helps. Please help if you know what I'm talking about, thanks.

:)

Answer
I do not design them but....
The principle is that the helmet material will deform and absorb the impact force and distribute it over the whole of the surface in contact with the head. By that means the pressure or impulse on the head/brain is reduced.
I think the main material inside the helmet (outside - just a shiny shell) is polystyrene which also is low density.

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could someone please answer the following stat's question?

bicycle helmets prevent head injuries image

Mary

There has been debate about the effectiveness of bicycle helmets in preventing head
injuries to bicyclists involved in accidents. In a group of 22 accidents where the
bicyclist suffered injuries, of the sixteen who were wearing a helmet three suffered
head injuries whilst of the six who were not wearing a helmet two suffered head
injuries. Determine if there is a difference in the incidence in head injuries between
those bicyclists who do and do not wear a helmet.

Answer
Let P1 be the proportion of those wearing a helmet that suffered head injuries
Let P2 be the proportion of those not wearing a helmet that suffered head injuries

H0: P1 = P2
Ha : P1 â  P2

p1-hat = 3/16
p2-hat = 2/6

Sample 1 proportion x1/n1 = 0.1875
Sample 2 proportion x2/n2 = 0.3333
Pooled proportion pi= (3+2)/(16+6) = 0.2273

Variance of difference in proportions = pi*(1-pi)*(1/n1+1/n2)
= (0.227273)(0.772727)(1/16+1/6) =0.0402462

Standard error of (p1hat-p2hat) = 0.200615

z = (p1hat-p2hat) / sqrt[pi*(1-pi)*(1/n1+1/n2)]
z = -0.145833 / 0.200615 = -0.726933

P( |z| > 0.726933) = (0.2327)(2) = 0.4654
P-value = 0.4654

Assume the significance level is 0.05
Since P-value > significance level, we do not reject the null hypothesis.

There is no evidence of a difference between the two groups.

What usually happens if you have to stay in the hospital for observation?

Jackie Bro

for a head injury. can you be observed at home?

Answer
You can be observed at home, but if you start to show signs of bleeding or pressure in the brain, it will be an awful lot longer before you get help. This significantly increases the chance of death or brain damage.

In most cases, the odds of a further problem are very low, probably less than 1%. But the consequences of not being in the hospital when your brain starts to bleed or swell can be pretty serious.

If you have symptoms of a severe head injury such as persistent headache, vomiting, or less of consciousness for more than a minute at the time of the accident, you really want to be in the hospital if things go wrong.

There was an 8 year old boy in Sacramento who fell off his bicycle, no helmet, seemed to only have cuts and scrapes. Doctors noticed that he had loss of memory around the time of the accident and the doctors felt that his speech and reasoning didn't seem right. He did stay in the hospital for observation, had a brain bleed, and it took immediate surgery to prevent serious brain damage.

Let the doctors do their job.

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How do bicycle helmets work?

bicycle helmets prevent head injuries image

Forgetful

There is a "shell" and a "liner" in a bicycle helmet, right? what is the purpose of those things? Is the shell supposed to stop it from breaking or is the liner supposed to be crushed?
Simple language please.
thanks!!!!!

Answer
There are variations depending upon the quality of the helmet and the purpose... for example, some DH helmets are practically MX helmets now but, in general...

Bike helmets have the liner and shell as you've mentioned, the liner actually does the majority of work in saving you from a fall. The shell is really just there to prevent things like stick and such on the tral from penetrating the liner and stabbing you in the head, or to keep the liner from coming apart on hard impacts. The liner is what handles the energy transfer that prevents you from sustaining severe injury. When you take an impact, the liner is supposed to get crushed... in doing so, it converts the kinetic energy (the energy of an object in motion) of the impact into thermal energy (heat) as the liner is crushed. Remember, energy can never be created or destroyed, it can only change forms... The type of material used in the liner and the overall quality of the helmet determine just how effective it is but that's the basic principle in ALL helmets actually. Most common helmets use an EPS liner, Expanded PolyStyrine, and are good for just one serious impact... Once the liner has been crushed, it no longer has the capacity to be crushed much further to allow for the conversion of energy needed to protect your head. Some other helmets use materials that allow the energy conversion to take place repeatedly and only need to be replaced if the shell material is compromised... these are typically MX helmets or very high-end downhill helmets.

Also, it's worth noting that essentially all bike helmets pass the same certifications so there isnt a whole lot of difference in protection between a $40 helmet and a $140 helmet... Most of the extra money that you pay goes into what was spent on R&D to figure out a way to incorporate more vents into the helmet without lessening the protection offered.

Do I need a permit or license for cycling in NYC?

YD

I am a cycling newbie that recently get a hybrid bike, so I just wonder if I need any bike license or need to follow any bicycle traffic rules? Like helmet is required or what if there is no bike route and something else. And how can I prevent bike stolenï¼ I bought an U-lock and cable lock, and I am gonna bring off the the front wheel and saddle every times, is it good enough?
Many thanks

Answer
Nope, you wouldn't need any permit or license or any of them trouble things to ride a bike in NYC. Just get on it and revolutionize the crank and pedal! But as a cyclist, you do need to follow the traffic lights, such as stopping at red lights. And because you're cycle, you are gonna need a helmet for sure to minimize the risk of having a head injury. There's no such thing as a "No Bicycle Route", just cycle on the roads and follow the traffic rules, do not ride on the pavement like a jerk. No, that's really too troublesome, just get three U-Locks and lock both of your rear and front wheels to the frame and another lock to lock the frame to a permanent structure.

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my friend skates with a football helmet on?

bicycle helmets prevent head injuries image

cy p

this way he says you do not break a tooth if you fall is this true or do you think he likes to stand out?

i do not know how to skate once tried wound up with 14 stiches so i really do not know maybe i shoulda worn a helmet.

Answer
Your friend is smart as many people who skate will fall and break a tooth or hit their head and some will sustain a concussion. Wearing a football helmet may be going a little to the extreme as there are bicycle helmets that look better than a football helmet and function well and protect one from head injuries although breaking ones teeth may not be protected by a bicycle helmet as it is with a football helmet or an ice hockey helmet. Too bad you didn't know this before you fell and needed 14 stitches as were you to have worn a helmet you may have prevented injury. Your friend may stand out and he may or may not want to stand out although he does want to prevent himself from breaking a tooth or his head were he to fall too hard.

does anyone know the symptoms and preventive care to myoclonus?

Alice N

Answer
Treatment depends on the cause.

The causes are many: Possible causes include:

* A lack of oxygen or nutrients
* Certain medications or toxins
* Nervous system disorders such as:
o Head or spinal cord trauma or injury
o Tumors of the brain or spinal cord
o Multiple sclerosis
o Parkinson's disease
o Alzheimer's disease
o Creutzfeldt-Jakob disease
o Huntington's disease
o Encephalitis
o Stroke
o Epilepsy
o Coma
* Metabolic disorders such as:
o Lipid storage disease (a congenital disorder that usually occurs in children)
o Electrolyte imbalance
o Respiratory failure
o Liver failure
o Kidney failure
o Malabsorption syndromes such as Whipple's disease or celiac disease.

Guidelines for preventing myoclonus depend on the cause. In many cases, myoclonus is not preventable. For example, if you have a family history of myoclonus, there is no known way to stop the disorder from developing.

Some cases that may be prevented include:

* Brain injuryâTake care to prevent accidents or injury. For example, wear a helmet when riding a bicycle or motorcycle.
* Medication side effectsâIf twitching begins after starting on a new medication, tell your doctor. Your provider may be able to lower your dose or switch to a different medication.

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