Physics - October 2006

Person, Place, or Thing

2006-10-22 09:03:35 · 3 answers · asked by Anonymous

How long will it take her to reach the bottom of the hill, assuming she starts from rest and accelerates uniformly, if the elevation change is 340 m?

What does it mean "the elevation change is 340 m" ?

My answer was 12.43 s
Is it right? If not how do I do it?

2006-10-22 08:59:07 · 5 answers · asked by sleepy 1

(a) A skier is accelerating down a 30.0° hill at a = 4.40 m/s2 (Fig. 3-36). What is the vertical component of her acceleration?
_______ m/s2 down.

I dont' get what to do with the acceleration. Would I be using the sin, cos, and tan stuff?

2006-10-22 08:40:32 · 2 answers · asked by beast 1

Calculate the energy of one photon of this radiation in joules.


I want to use c=(wavelength) V

But I'm not sure how to get that into J after i find v.. Ideas?!

2006-10-22 08:02:59 · 3 answers · asked by Anonymous

Two vectors have magnitude V1= 4 km and V2= 7.5km. What are the maximum and minimum magnitudes of thier vector sum?

I don't get how to do this, can someone explain it to me?

2006-10-22 07:55:38 · 3 answers · asked by beast 1

Two billiard balls of equal mass move at right angles and meet at the orgin of an xy coordinate system. One is moving upward along the y axis at 2.0m/s, and the other is moving to the right along the x axis with a speed 3.7 m/s. After collision (assumed elastic), the second ball is moving along the positive y axis. What is the final direction of the first ball and what are thier two speeds?

Usually when working with billiard balls one is at rest during collisions, so the two balls being initially moving is confusing me.

2006-10-22 07:50:35 · 2 answers · asked by bippidibopiddi 2

2006-10-22 07:49:10 · 1 answers · asked by Ainur K 1

PROBLEM: What are the temperatures for freezing water and boiling water on the Kelvin temperature scale?

Please show your work how you get it. Thanks

2006-10-22 07:45:14 · 5 answers · asked by Gordito 1

C = Means Degrees

And please, show me how you get it.

2006-10-22 07:42:07 · 2 answers · asked by Gordito 1

A Ferris wheel that has a diamter of 40 feet makes one revolution every two minutes. What is the speed of the seat on the rim of the wheel (miles per hour)? If you are the last person to get ont he Ferris whell, what will the coordinates of your location be after 3 minutes? (Assume taht at t=0 you are at the lowest point on the ride.)

Thank you JSAM for everything

2006-10-22 07:21:27 · 3 answers · asked by Glenn T 1

2006-10-22 06:50:55 · 2 answers · asked by Anonymous

Time is linear but there are ppl i.e. my lecturer that says time is circular.
To me time can be divided into past, present & future BUT he saying that time is more than that, it is always the same (present)but the only thing that changes is matter

WHAT DO YOU SAY?

2006-10-22 06:50:30 · 7 answers · asked by mørbidsшεεŧnεss 5

the application of force only once can also cause acceleration

2006-10-22 06:22:27 · 6 answers · asked by behroz_ahmedali 2

I know that matter and anti matter cannot coexist without canceling each other out in a violent manner. But are there more stable forms such as antihydrogen that could be created in more than just trace amounts. Could a form of antimatter ever be used as a power source?

2006-10-22 06:06:21 · 10 answers · asked by Anonymous

If in the space i.e an ideal condition where there is no gravity, a ball is hit with some force and the ball accelerates, so does its kinetic energy also increase constantly with the increase in velocity?
Where does that energy come from?
How can we calculate the work done?

I will be thankful to you all for ur answers.

2006-10-22 06:03:18 · 6 answers · asked by behroz_ahmedali 2

2006-10-22 05:58:50 · 2 answers · asked by bellabambina25 1

what makes it easy to be straight up when I ride my bicycle and why is it so difficult if I am not moving?

2006-10-22 05:00:42 · 7 answers · asked by cdnmakesi 2

The displacement of the car at the end of this 1.0 second interval is?
A, 20. m
B, 20. m/s
C, 20. meters east
D, 20. m/s east

2006-10-22 04:55:21 · 9 answers · asked by KUMAR 2

How fast can you set the Earth moving? In particular, when you jump straight up as high as you can, what is the order of magnitude of the maximum recoil speed that you give to the Earth? Model the Earth as a perfectly solid object. In your solution, state the physical quantities you take as data, and the values you measure or estimate for them.

2006-10-22 04:29:07 · 2 answers · asked by Anonymous

I am the atom great “Universe”, I divide myself in three forces: Prótons, Elétrons and Nêutrons. To the Prótons it is the positive power, but with the negative return, and to electrons it is the negative power, but with the positive return. In what it says respect to the Nêutrons is the responsibility to act the end to unbalance the positive forces or the negative in its related limits. Thus it neutralizes the start and the extremity of all the sources of being able of the universe (mainly the sun, the planets and the Interstellar system). The energies that come of the place for where to go, and go for the place of where they come.

2006-10-22 04:19:11 · 2 answers · asked by britotarcisio 6

i have given A=60 deg. N of E, and B=60 deg. S of E what will i do if it asks A+B, A-B, and B-A in triangle method?

2006-10-22 04:08:25 · 1 answers · asked by Anonymous

what is divergevce of a vector field?

2006-10-22 04:06:14 · 1 answers · asked by aritra 2

2006-10-22 03:40:39 · 11 answers · asked by Rusty Pitt 4

2006-10-22 03:36:42 · 12 answers · asked by shee ram 1

2006-10-22 03:33:30 · 7 answers · asked by shee ram 1

I build an ion-powered spacecraft. It has an Ion engine on the back, which accelerates Xenon ions electromagnetically and shunts them out the back, eventually allowing my little craft to pick up to a significant fraction of light speed after a few hundred years.
I also have a particle accelerator on my ship. It is pointing forwards. I wait until we are nearer to light speed, say 80%. I then accelerate an antiproton or a Higgs Boson or similar makeyuppyon to 30% of light speed, which I believe is possible in a linear accelerator, and fire it forwards. Why won't it be doing 110% of light speed?
I am sure my little plan is full of complex holes but am keen to know what they are (financial considerations not included).

2006-10-22 03:24:48 · 13 answers · asked by MindlessVandal 1

2006-10-22 02:56:15 · 7 answers · asked by Melissa 2

This is my first physics class I've ever taken and I'm only halfway through it... maybe this is simple and I'm just missing it, but if anyone knows the answer and can explain it to me, I would be very grateful. =)

2006-10-22 02:37:01 · 2 answers · asked by Anonymous

2006-10-22 02:26:23 · 9 answers · asked by Anonymous

From Jack (16)
Within the visible spectum of things, pure white reflects all "colours", & black absorbs them.
So what is "grey", a mixture of the two.
Cheers, interesting answers & thoughts ?
Jack

2006-10-22 01:52:28 · 17 answers · asked by Bob the Boat 6