Physics - May 2007

when a person's height is measured at sunrise, he is taller than his measured height in the evenings

2007-05-13 23:16:33 · 9 answers · asked by vkays 2

Could anyone help me to solve these four physics problems:


1) Boat's engine during 1 second can give speed v to L litres of water. What is the maximum speed of boat, if its mass is equal to M?


2) A comet flys to Earth with speed v. The angle between the speed vector and the straight, which connects Earth and the comet, is equal to alfa. What the value of speed v should be, that the comet:

a) would become a satellite of Earth;
b) would hit the Earth;
c) would escape from the gravitational influence of Earth;


3)A heavy metal ball starts to fall from 1 meter height, ant this ball hits a light tennis-ball on the table. After the hit, metall ball rises nearly to 1 meter height. To what height does a light tennis-ball rise?


4) A dumbbell (distance between balls is l) stands upright on a flat. This dumbbell is released to move. What speed will have each ball when the dumbbell hits the flat (there is no friction).

Thanks in advance.

2007-05-13 22:59:36 · 2 answers · asked by Pythagor 1

2007-05-13 22:15:53 · 15 answers · asked by Maria K 1

2007-05-13 21:48:07 · 6 answers · asked by phy2006 1

What is the period of a pendulum whose length is 1.3m/s, whose amplitude is 10cm and whose mass is 250g? Thanks!!

I really just need to know the appropriate equation for this..

2007-05-13 19:39:20 · 1 answers · asked by billf39 2

A tunnel connects two points A and B on the earth's surface as shown at the right. the surface distance from A to B is 200mi. Use two terms of the power series for cosx to approximate the maxiumum depth of the tunnel. use the approximation 2000 mi for the radius of the earth

2007-05-13 19:20:59 · 1 answers · asked by andy ROO 1

Also, what is max work?

2007-05-13 19:20:17 · 1 answers · asked by ron g 2

2007-05-13 17:28:26 · 4 answers · asked by Anonymous

I know the answer is aluminum but I don't understand why?

2007-05-13 17:24:48 · 5 answers · asked by Anonymous

2007-05-13 17:10:44 · 3 answers · asked by Anonymous

Can u use scinetific words?

2007-05-13 16:35:11 · 3 answers · asked by Anonymous

alright im in a somewhat advanced physics class and there is an extra credit assignment to build something that demonstrates some of the principles of physics that we have gone over in class.

any ideas of simple things to build / make

2007-05-13 16:31:25 · 8 answers · asked by BCS 2

2007-05-13 16:27:44 · 4 answers · asked by sp0ngeb0bwanab 1

if somebody took a plasma ball (the ball that you put your finger to and the electricity follows) what would happen if the glass was cracked or broken and then the switch was turned on?
would it shock people?

2007-05-13 16:05:58 · 4 answers · asked by D3V!N 5

concusion waves back in the direction of inner universe. Wouldnt this extreme power conteract the acceleration and in turn redirect this power and if so wouldnt the universe not be flat but instead have bulges that are growing because of this phenomenum.

2007-05-13 15:48:53 · 2 answers · asked by nanomajor 1

2007-05-13 15:36:25 · 6 answers · asked by Thomas G 2

2007-05-13 14:22:25 · 7 answers · asked by Raymond O 1

Any website which I could use as refence? Thanks :)

2007-05-13 13:48:13 · 2 answers · asked by wonderwoman 1

I really hope somebody can give me an extensive answer to this. A link to a website where I can find resources would greatly help. Thanks :)

2007-05-13 13:46:40 · 3 answers · asked by wonderwoman 1

2007-05-13 13:39:36 · 4 answers · asked by Love.Angel.Music.Baby 3

2007-05-13 12:53:06 · 1 answers · asked by knowhow 1

2007-05-13 12:52:45 · 6 answers · asked by spindymindi 3

Two condensers of capacity 4microfarad and 2microfarad are charged to 50V and 100V.These are connected tsuch that likely charged plates are joined together.then the energies stored before and after joining will be in multiples of10^-2 Joule will be
1. 1.33 and 1.5
2. 1.5 and 1.33
3. 2.67 and 3
4. 3 and 2.67

2007-05-13 12:49:22 · 1 answers · asked by godisgreat 1

I was wondering what the flaws of modern day physics are. As I learn more about physics, I've been seeing that things don't connect like they are supposed to.

2007-05-13 12:12:50 · 6 answers · asked by Innovater Jill 3

Ok here are 2 questions that i really need help with on my review....they both deal with centripetal force.

Can you plz show the work too! thankyou....

Problem 1
A dirtbiker rides over hills. If one hill had a radius of 2 meters, what is the minimum speed he must be travelling to feel motionless?


Problem 2
A ride spins ppl in a vertical circle. The radius of the ride is 3 meters and spins the ppl at a constant speed of 8 m/s.

(a) what is the NORMAL FORCE the ride exerts on a 70kg person at the TOP of the vertical loop.

(b) what is the NORMAL FORCE the ride exerts on a 70kg person at the BOTTOM of the vertical loop.

....please show me how to do it & THANKYOU sooooooooooo much for helping me!!!!!

2007-05-13 11:46:52 · 1 answers · asked by John D 2

2007-05-13 11:43:58 · 1 answers · asked by JEFFREY S 1

how would you go about shielding a strong magnet such as that from a car speaker? What materials are there or any links to more information would be useful. Thanks.

2007-05-13 11:29:15 · 1 answers · asked by Gobi K 2

Anwser is not 25X

Please help.

2007-05-13 11:21:56 · 5 answers · asked by Anonymous

Please i need this now and explain a little i need help badly u will be rewared greatly

2007-05-13 10:26:39 · 4 answers · asked by Shawn 1

Certain types of black and white film are not sensative to red light. They can be developed with a red "safelight" on. Explain this on the basis of the photon theory of light ?

2007-05-13 09:20:09 · 2 answers · asked by K_K 1