Physics - November 2006

You are shadowing a nurse in the emergency room of a local hospital. An orderly wheels in a patient who has been in a very serious accident and has had severe bleeding. The nurse quickly explains to you that in a case like this, the patient's bed will be tilted with the head downward to make sure the brain gets enough blood. She tells you that, for most patients, the largest angle that the bed can be tilted without the patient beginning to slide off is 32.0 degrees from the horizontal.

a. on what factor does this angle of tilting depend?
b. find the coefficient of static friction between a typical patient and the bed's sheets.

This problem is giving me trouble.
Please help me to understand it.

I have asked this question before, and have got confusing results.

2006-11-08 12:02:28 · 2 answers · asked by swimmertommy 1

Why do we need air resistance? Why is it important?

2006-11-08 12:01:28 · 1 answers · asked by blondie_879 3

PLEASE HELP GIVE DETAIL RESAULTS

2006-11-08 11:58:46 · 2 answers · asked by newgirl 1

According to a legend, a horse learned Newton's laws. When the horse was told to pull a cart, it refused, saying that if it pulled the cart forward, according to Newton's 3rd law there would be an equal force backwards. Thus, there would be balanced forces, and, according to Newton's 2nd law, the cart wouldn't accelerate. How would you reason with this horse??


--- i understand u all hate giving out answers,, I don't want u to ... (if u dont want to lol) but can someone explain this question to me??? what does it mean and what should i be focusing on ????

2006-11-08 11:57:16 · 1 answers · asked by Sheyna 1

A particle of mass 0.4kg is subjected to two forces F1=2Ni-4Nj and F2= -2.6Ni+5Nj. If the particle starts from rest at the origin at t=0 find its position and velocity at t=1.6 sec.

2006-11-08 11:48:08 · 4 answers · asked by lpfanz89 1

The mass of both objects are exactly the same

2006-11-08 11:42:12 · 1 answers · asked by Anonymous

--- If you find a pendulum clock running slightly fast, how can you adjust it to keep better time?(what exactly is a pendulum clock?)

--- From the top of a tall building, you drop 2 table tennis balls, one filled with air and the other w/ water. Both experience air resistance as they fall. Which ball reaches TERMINAL VELOCITY first? Do both hit the ground at the same time?
( i know the answer to the second question, but i read wut terminal velocity is but how do u kno which one reaches first?) .....




only if u want to explain:

Ok, its often said that 1 kg = 2.2 lb (right?)... what does this sentence mean??? and what would be the proper way of making the comparison (if u had to)??\



thnx.. a LOT

2006-11-08 11:20:55 · 3 answers · asked by Sheyna 1

A person is standing on a spring bathroom scale on the floor of an elevator which is moving up and slowing down at the rate of 2.24 m/s^2. The acceleration of gravity is 9.8 m/s^2. If the person's mass is 83.8 kg, what does the scale read? Answer in untis of n.

2006-11-08 11:20:34 · 1 answers · asked by Anonymous

A person stands on a scale in an elevator. The maximum and minimum scale readings are 771.7 N and 318.8 N, respectively.
The acceleration of gravity is 9.8 m/s^2.
Assume the magnitude of the acceleration is the same during starting and stopping, and determine the acceleration of the elevator. Answer in units of m/s^2.

2006-11-08 11:15:46 · 2 answers · asked by Anonymous

the question is:
A can of pop is gfiven a shove. It slides across a table, eventually coming to a stop. If its initial velocty is 2.0 m/s, and the coefficient of kinetic friction between the two surfaces is 0.20, how far will it travel across the table?

errr im struggling with this, i dont know how to find mass and im left with a whole bunch of unknown variables...please help, thanks!

2006-11-08 11:06:11 · 3 answers · asked by DOWNCAST 1

i need to build a catapult no greater than 1.5-meter X 1.5-meter X 1.5-meters for physics. i cant buy a kit. It will be launching ballons. no motors or any type of fuel may be used. It must have a trigger that realeases the projectile. Any ideas? Any help will be greatly appreciated.

2006-11-08 10:54:57 · 5 answers · asked by mexshadyfan 1

2006-11-08 10:50:18 · 3 answers · asked by goring 6

In other words, is there anything that can influence the force of gravity? (besides something huge like another planet.)

2006-11-08 10:33:40 · 12 answers · asked by somerslats 2

Why not just stick to newtons laws?

2006-11-08 10:29:11 · 3 answers · asked by goring 6

An airplane flies in level flight at constant velocity, eight miles above the ground. (Assume the earth is flat.) The flight path passes directly over a point P on the ground. The distance from the plane to P is decreasing at the rate of 4 miles per minute at the instant when this distance is 10 miles. Compute the velocity of the plane in miles per hour.

2006-11-08 10:24:46 · 1 answers · asked by iamthehandcuff 1

2006-11-08 10:20:24 · 5 answers · asked by goring 6

I have to create a container in which i will put an egg and it will be thrown against the wall. The container that keeps the egg safe and is the lightest will be given the highest grades any ideas what i should do?

I was thinking of using a styrofoam ball and cutting a hole on the top and sliding the egg into it and fill it with some of that stuff that when you inject it it gets hard (insulation i think)

2006-11-08 10:05:24 · 2 answers · asked by strawberrylollipop12345 1

if spring had energy stored to make it move at light speed?

2006-11-08 09:42:22 · 2 answers · asked by goring 6

2006-11-08 09:31:17 · 4 answers · asked by goring 6

ok lets all be daft how long is a piece of string

2006-11-08 09:22:01 · 6 answers · asked by hjd 2

i am working on my science homework. and i need to find the density of some liquids. the first question is: find the density of-liquid with the volume of 48 L and 36 kg..
what would i do??
please help me, i left my book at school. and no other website has helped.

2006-11-08 09:13:47 · 11 answers · asked by moosemaroose97 1

2006-11-08 09:13:23 · 3 answers · asked by music lover 1

Wouldnt construction of buildings be more safe that way by using more accurate calculation?

2006-11-08 09:09:20 · 3 answers · asked by goring 6

When the pollin falls in the pond as stated earlier and the water particals bombard it, is a random act or is it some kind of magnetic attraction?

2006-11-08 09:02:05 · 1 answers · asked by happylife22842 4

every object has the force of grvity cating on it, and objects are also attracted to each other so within what part of an object or atom if u may is gravit produced

2006-11-08 09:01:37 · 8 answers · asked by luqman P 1

2006-11-08 08:51:06 · 4 answers · asked by Icefire 3

2006-11-08 08:41:49 · 9 answers · asked by andy k 1

can someone suggest a formula? where the variables are
v= velocity in m/s (what we want to know)
D=internal diamter of pressure vessel (mms)
L = length of pressure vessel
d= internal diameter of barrell (also i.d of valve leading to pressure vessel)
l = length of barrell
M = mass of projectile in grammes
P = pressure of pressure vessel in psi (which i will covert to bar....anyway know how to convert bar to pascals?)
T = time valve is open in seconds
the spud gun will consist of a pressure vessel storing compressed air, with a valve in front of it leading to the barrel. when the valve is opened air will be released pushing a projectile out the barrell
couls soem one build me an equation to calculate the velocity of the projectile using these variables? i see all these spud gun sites on the net and id love to know how fast they go...
also whats the speed of sound?

2006-11-08 08:39:22 · 2 answers · asked by mrx 1

All EM waves travel at the speed of light, but for example an Xray has more energy than a microwave.

So were has the 'extra' energy of the Xray come from? It can't be kinetic because both waves have the same speed

help please

2006-11-08 08:37:05 · 3 answers · asked by benabean87 2

2006-11-08 08:25:07 · 2 answers · asked by goring 6