Physics - November 2006

2006-11-09 00:04:33 · 8 answers · asked by anaconda 1

2006-11-09 00:03:55 · 9 answers · asked by robertf_9999 1

1.A car's velocity as a function of time is given by Vsubscript of x(t)=alpha+beta*t^2,where alpha=3m/s & beta=0.100m/s^3.a.)calculate the average acceleration for the time interval t= 0 to t=5 sec.b.)calculate the instanteneous acceleration for i.)t=0;ii.)t=5 sec

2.A dog running in an open field has components of velocity Vsubscript x=2.6 m/s and Vsubscript y=-1.8 m/s at tsubscript 1 =10 s .For the time interval from t subscript 1 =10 s to t subscript 2 = 20 s,the average acceleration of the dog has magnitude 0.45 m/s^2 and the direction 31 degree measured from the +x-axis toward + y-axis. At tsubscript 2 =20 s, a.)What are the x and y components of the dog's velocity? b.)what are the magnitude and direction of the dog's velocity

3. Jillian angrily throws her engagement ring staright up from the roof of a building,12 m above the ground, with an initial speed of 5 m/s.you may ignore air resistance.For the motion from herhand to the ground,what are the magnitude & direction of a.)the average velocity of the ring? b.)the average acceletarion of the ring? c.)in how many seconds after being thrown does the ring strike the ground? d.) what is the speed of the ring just before it strikes the ground?

2006-11-09 00:01:43 · 2 answers · asked by khenzkey_wawa08 1

"briefly describe how greater wing thickness will cause a greater Pressure Difference above and below the wing?" i have this Question for college physics work, and cant find the answer, any help?

2006-11-08 23:59:18 · 2 answers · asked by JinMu 2

2006-11-08 23:56:12 · 7 answers · asked by matrix 1

2006-11-08 23:32:22 · 5 answers · asked by anisia17 1

2006-11-08 23:25:30 · 4 answers · asked by Hermione 2

I mean a regular toy balloon, filled with Helium. How high up does it go? What happens at maximum altitude? Please cite your source, if you don't mind. My 3 year old let his "Trader Joe's" balloon fly out of his hand in the front yard yesterday, and is demanding a full explanation as to why Daddy was unable to retrieve it. No kidding.

2006-11-08 23:21:41 · 10 answers · asked by Anonymous

instead of saying that the car is accelerating?

2006-11-08 22:00:44 · 10 answers · asked by Anonymous

a good physics website would be nice... ; )

2006-11-08 21:57:58 · 12 answers · asked by Anonymous

I bet it has to do something with oxygen, right? Would you please explain it?

2006-11-08 21:57:01 · 6 answers · asked by Anonymous

2006-11-08 21:51:05 · 7 answers · asked by lucky07 1

2006-11-08 21:49:48 · 2 answers · asked by Vahidreza A 1

I normally see it when the enironment is dark and when I wasn't wearing glasses...It looks like tv snow in the dark.Is it some kind of optical illusion? Is it normal and natural?

2006-11-08 21:28:15 · 8 answers · asked by joe 4

...Since you would be travelling at the same speed as the light around you?

2006-11-08 20:53:59 · 18 answers · asked by TVP 2

2006-11-08 19:02:14 · 17 answers · asked by Anonymous

What are we missing?Is there somethings in these other spectrums that we can see such as dimensions where the ghost figures that people seem to see from time to time when there is a split moment or maybe the light hits the other specturms just so ,and we are able to see within those spectrums? If there are so many things we cannot see what else are we missing?

2006-11-08 18:03:40 · 5 answers · asked by LL B 2

A chain of length L and mass M is held up above a table. The lowest part of the chain slightly touches the top of the table. When we let go of the chain, it starts falling on the table and we assume that each link comnes to rest the instant it reaches the table.
Find the force exerted by the table on the chain after this has fallen through a distance x.

The distance fallen = x so the rest of the chain that is still in 'upright' position is L-x.
At first when we hold the chain up, the force F=mg is 0 since no mass is touching the table. I understand that the force depends on the length that lies on the table at that moment but how do I calculate this?? Can it be something like Mgx/2L ?

2006-11-08 17:51:09 · 5 answers · asked by dutchess 2

i remember when some school had balloon day and released hundreds of helium inflated baloons. i just thought that can't be good.
isn't it the opposite of littering. instead of the falling to the ground it goes up in the sky. but what goes up must come down right? so does it ever come back down to earth or what. and what about planes. i'm choc full of questions here. :)

2006-11-08 17:37:36 · 5 answers · asked by Shadow of a girl 3

2006-11-08 17:26:24 · 2 answers · asked by helmi h 1

What if a series of trains or vehicles fit into each other like a Russian doll, accelerating one after another so that the more inside the train, the more speed. Would not the speeds add to each other, eventually hitting the speed of light? Or is this not possible?

2006-11-08 17:22:57 · 5 answers · asked by Ricardo 1

I need it for a scince project, links, information anything would work.. thank you..

2006-11-08 17:19:41 · 8 answers · asked by Attu 2

2006-11-08 17:13:53 · 2 answers · asked by sharafudheen k 1

Is it possable to melt a hole in glass with a propane blow torch.

2006-11-08 17:03:39 · 7 answers · asked by Anonymous

2006-11-08 16:48:53 · 5 answers · asked by teekay 1

Is it possible to melt a hole in glass with a normal blow torch.

2006-11-08 16:40:57 · 3 answers · asked by Anonymous

Is it possible to melt a hole in glass with a normal blow torch.

2006-11-08 16:38:56 · 2 answers · asked by Anonymous

Im not too good with friction and newtons laws, so i dont know where to start with this. I was able to figure out all but two problems on my HW packet, and i dont have a book so if someone can show me how to do this last problem, i will be very greatful (and can finally get some sleep :)

A 100kg fireman is being lowered from a floor 10 meters above the ground by a rope whose breaking strength is 800 N. The fireman starts from rest and the person lowering the frieman knows the 800 N limit must be adhered.
Draw a free body diagram showing all the forces exerted on the fireman.
What is the fireman velocty when he touches the ground?
The fireman moves 20 cm during his stopping. What is the average normal force exerted on the fireman during the stop?


Thats the question. Since i dont have a book, for the past hour iv been trying to find similar questions and forumlas online to no luck, so i had to resort to asking here. I hope someone here can please help with this question.

2006-11-08 16:28:35 · 2 answers · asked by mryabin 2

i need the formula and procedure, thank you :D

2006-11-08 16:14:50 · 4 answers · asked by teekay 1

2006-11-08 16:00:04 · 9 answers · asked by Howard H 1