Physics - November 2007

What are the steps to built one?

2007-11-28 11:36:17 · 2 answers · asked by mari 6

Paul shoots a hockey puck, its initial velocity is 6.0 m/s, the coefficient of friction is .02. how far does the puck travel before it comes to a stop?

2007-11-28 11:33:15 · 1 answers · asked by eric_morris9 2

I really love physics when it comes to theory: the laws of motion, the priniciples of weight distribution, the speed of light, etc but math is an alien language to me. anyone else like this?

2007-11-28 11:31:51 · 12 answers · asked by Anonymous

2007-11-28 11:27:50 · 1 answers · asked by Anonymous

b) How long does it take the sun to lose mass equal to that of the earth?

Thanks

2007-11-28 11:26:04 · 1 answers · asked by Anonymous

... Having a tough time with this.

The dimensions are as follows: 20mm*20mm*45mm with a mass of 0.078kg ...

How do I calculate the density. From my work I believe my calculation failed with units of mf dimensions; Hence mm^3 to m^3.

2007-11-28 11:24:44 · 3 answers · asked by bouncing_soul_geuse 2

does anyone know the method of capturing gas is???

2007-11-28 11:07:39 · 14 answers · asked by Pre lives on 5

A car is traveling at 2.3 m/s and a mass of 250 g is hanging from the ceiling in the car on a string 1.2 m in length. What angle does the string make with the vertical?

2007-11-28 11:04:28 · 1 answers · asked by eric_morris9 2

A car is accelerating at a rate of 2.3m/s^2. a mass of 250 g is hanging from the ceiling on a string 1.2m long. What is the angle that the string makes with the verticle

2007-11-28 10:54:20 · 1 answers · asked by Anonymous

How do u solve this problem

2007-11-28 10:32:55 · 1 answers · asked by ArmaniCode 1

OK so I have these questions but I also want to know how to do them. My teacher couldn't explain to me how to get the answers to these questions. Please help!

1. Work = 20N X 100m

2. 60J = 30N X distance?

3. 20J = force? X 2m

4. Work? = 10N X 500m

5. Work? = .2N X 600m

6. 5,000J = 500N X distance?

7. Work? = 82N X 76m

8. Work? = 820N X 205m

9. Work? = 20N X 0m

10. 200 W = 2000 J / Time?

11. 15 W = Work? / 10 sec

12. Power? = 56 J / 2 sec

13. Power? = 324 J / 18 sec

14. Power? = 500 J / 50 sec

15. Power? = 2,400 J / 60 sec

Thanks

2007-11-28 10:27:58 · 2 answers · asked by Anonymous

i need help on my homework.
who discovered the atom?
who thought that atoms took random paths?
and
who thought that atoms were hard dence spheers?
NEED HELP BY TODAY.

2007-11-28 10:22:40 · 2 answers · asked by Anonymous

the ball is hit at an angle of 37.3 degrees to the horizontal, and air resistance is negligible. assume the ball is hit at a height of 1.1 m above the ground.
a) what is the initial speed of the ball? Answer in units of m/s.
b) How much time does it take for the ball to reach the wall? Answer in units of s.
c) Find the speed of the ball when it reaches the wall. Answer in units of m/s.

2007-11-28 10:14:00 · 2 answers · asked by love psychedelico 1

Your weight is the result of the gravitational force on Earth on your body. What is the corresponding reaction force?

2007-11-28 10:08:32 · 4 answers · asked by ღ 5

a) 246.94Hz, 220.00Hz, 261.63Hz, and H.

This is supposed to be a composer, but I don't know how.

b) 440.00Hz, 523.25Hz, and 659.26Hz

How are these three frequencies related?

2007-11-28 10:08:27 · 1 answers · asked by Anonymous

The relationship E= (1.24 *10 ^3) / λ, where E is the energy of a photon in electron colds and λ is the wavelength in nanometres, is a handy form of the equation E = (h*c) / λ. Substitute E=(h*c) / λ and make any necessary unit conversions, to show that E= (1.24*10^3) / λ, is valid for nanometres and electron volts.

Basically, i have to solve for h*c.. i did that and i got:

hc= (6.63 * 10 ^-34 J/s) * (3.0 * 10^8 m/s)
= 1.989 * 10 ^ -25 J/m

I now need to convert that into nanometres and electron volts (eV).
1 nm = 1.0 * 10^9 m and 1eV = 1.60 * 10^ -19 J

I'm having difficulty...anyone know how to solve this?

2007-11-28 10:06:12 · 1 answers · asked by Anonymous

I understand that the brain interprets this and turns it right-side-up.......but WHY? is it just something we are born with?

2007-11-28 10:00:48 · 9 answers · asked by tennis_tacos 1

how are they different and what's the meaning of each??

2007-11-28 09:56:20 · 1 answers · asked by nunyabuzinesz732 1

based on science

2007-11-28 09:25:13 · 1 answers · asked by Someone 2

an object is hit given the initial velocity of 6m/s. if the coefficient of kinetic friction between object and surface is .02 . how far will the object travel before stopping

2007-11-28 08:46:15 · 2 answers · asked by Anonymous

The plane's horizontal velocity was 125 m/s at the instant the hamper was dropped. The acceleration of gravity is 9.8 m/s/s. What is the magnitude of the overall velocity of the hamper at the instant it strikes the surface of the ocean? answer in units of m/s

2007-11-28 08:43:16 · 2 answers · asked by love psychedelico 1

A good approximation is that the smallest wavelength possible for a sound wave in a gas is the separation distance between molecules. Find the highest-frequency sound wave possible in an atmosphere in which the wave speed is 403 m/s, the density 1.18 kg/m3, and the average molecular mass is 4.82 10-26 kg. Assume that the molecules form a cubical grid.



assume the air molecules are spherical and that they touch so that the
distance from center of one molecule to the center of another molecule is 2rmolecule

2007-11-28 08:35:19 · 1 answers · asked by thegenuwineone 2

2007-11-28 08:14:20 · 3 answers · asked by haja101 1

A 60.0 kg runner expends 335 W of power while running a marathon. Assuming that 11.0% of the energy is delivered to the muscle tissue and that the excess energy is primarily removed from the body by sweating, determine the volume of bodily fluid (assume it is water) lost per hour in cm^3. (At 37.0°C the latent heat of vaporization of water is 2.41 x 10^6 J/kg.)

2007-11-28 07:55:29 · 3 answers · asked by Sasha 1

A cylinder contains 270 L of hydrogen gas (H2 at 0.0° C) and a pressure of 10 atm. How much energy is required to raise the temperature of this gas to 25°C?

2007-11-28 07:11:39 · 2 answers · asked by Jerry M 1

4. You measure a distance from diffraction to screen to be 285[mm]. What should be the angle to the first spot measured off axis, if the distance from the center spot is 1.204E+02[mm]?
angle = __________________ [degree]
Use three significant figures or N/A, if not enough information is given.


--------------------------------------...
5. What is the previous answer in radian?
angle = _____________[radian]
Use three significant figures or N/A, if not enough information is given.

PLEASE HELP AND EXPLAIN STEP BY STEP THANKS, HAVING A HARD TIME!!

2007-11-28 06:59:51 · 1 answers · asked by Anonymous

i Cant figure out how to solve these 3 questions please help.Please help i dont understand and please dont just give me the answer. try to explaine the steps to me thank you very much

A force of 825NIS NEEDED FOR TWO PEOPLE TO PUSH A CAR 35 M. How much work is done? HOW MUCH ENERGY DID THE PEOPLE EXPEND?

Sarah pulls her little red wagon along a path a distance of 16 m. She exerts a force of 95 N at an angle of 35 degrees with respect to the direction of motion. How much work does she do?

An electric motor develops a 65 KW of power as it lifts an elevator 17.5 m in 35 sec. What average force does the motor ecert?
Please help i dont understand and please dont just give me the answer. try to explaine the steps to me thank you very much

2007-11-28 06:46:44 · 5 answers · asked by ajnsdsjafnsafu 1

Okay, every one now a day's seem to talk about Nuclear atom craft werks. See Russia, China, North Korea and Iran. What is it all about? Is it really just to create a more efficient way of energy consumption? Or just another way to blow up at each other faces when we do not agree about something? Whats your opinion on that matter?

2007-11-28 06:08:04 · 2 answers · asked by angelikabertrand64 5

For what value of v does gamma = 1.0295? Observe that for speeds lower than this value, time dilation and length contraction are effects amounting to less than 2.95%.

2007-11-28 05:55:06 · 1 answers · asked by Anonymous

Does anyone know of any suppliers or manufacturers of superconductors that work at normal temperatures?

2007-11-28 05:54:42 · 6 answers · asked by Anonymous