Physics - October 2007

2007-10-26 10:37:05 · 21 answers · asked by LULU 1

A dive bomber has a velocity of 265 m/s at an angle below the horizontal. When the altitude of the aircraft is 2.15 km, it releases a bomb, which subsequently hits a target on the ground. The magnitude of the displacement from the point of release of the bomb to the target is 3.30 km. Find the angle.

2007-10-26 10:31:52 · 1 answers · asked by azajan 1

I'm trying to help my 10 years old niece for her Science Fair. What is the term used to explain this occurence? Would you say thermal conductivity? Thank you.

2007-10-26 08:51:09 · 1 answers · asked by cappuccino_lava 6

2007-10-26 08:41:51 · 5 answers · asked by xo_kayla_444 2

If atoms are just energy did energy create all matter

2007-10-26 08:10:31 · 5 answers · asked by Ken 1

1. A 0.50 kg block, starting at rest, slides down a 30.0° incline with kinetic friction coefficient 0.24 (the figure below). After sliding 82 cm down the incline, it slides across a frictionless horizontal surface and encounters a spring (k = 38 N/m). What is the maximum compression of the spring? and After the compression of part (a), the spring rebounds and shoots the block back up the incline. How far along the incline does the block travel before coming to rest?

2.A crate of mass m1 on a frictionless inclined plane is attached to another crate of mass m2 by a massless rope. The rope passes over an ideal pulley so the mass m2 is suspended in air. The plane is inclined at an angle = 36.9°. Use conservation of energy to find how fast crate m2 is moving after m1 has traveled a distance of 1.4 m along the incline, starting from rest. The mass of m1 is 13.4 kg and the mass of m2 is 18.8 kg.

Any kind of help would be really really appreciated. Thanks

2007-10-26 07:18:37 · 1 answers · asked by Amanda P 1

He left behind a Bulova, not sure of it's age... (<30) My 8-yr daughter would like to wear it. Having gone to WalMart, and then a few places in the mall, none of which would touch the thing (battery-wise). Ended up at a local jeweler's repair shop to tell me that the watch needed a mercury battery that was out dated (out lawed) some time ago. Isn't there some cell that satisfies the watch's requirements? Somebody tell me the technicality of this. Does it have to do with voltage or polarity?

2007-10-26 07:05:27 · 2 answers · asked by Christopher D 2

...either gainst or with the rotation of the planet could we slow down/speed it the planets rotation? we disscussed this in physics A-level some years back it was fairly interesting so I just wanted to see what you guys thought even though I do know the answer

2007-10-26 07:01:46 · 10 answers · asked by vorash 3

2007-10-26 06:50:12 · 7 answers · asked by abel13111 2

Ok i need to know how to right a equation that will represent the parabolic motion of a catapult!!!! Or the parabolic motion of the projectile that comes out of a catapult

If your not quite sure about my project go here and read anything that talks about waterfountain project or projectile motion
http://www.abhs.k12.nm.us/classes/Math/Stacey/11th%20Grade/Staceys11thGrade.htm

2007-10-26 06:03:33 · 2 answers · asked by BlahBluhBlahBluhBlah 2

At a playground, a 18.0 kg child plays on a slide that drops through a height of 2.21 m. The child starts at rest at the top of the slide. On the way down, the slide does a nonconservative work of -312 J on the child. What is the child's speed at the bottom of the slide?

2.A particle moves under the influence of a conservative force. At point A the particle has a kinetic energy of 14 J; at point B the particle is momentarily at rest, and the potential energy of the system is 24 J; at point C the potential energy of the system is 6 J.
(a) What is the potential energy of the system when the particle is at point A?
J
(b) What is the kinetic energy of the particle at point C?

2007-10-26 05:14:11 · 1 answers · asked by Anonymous

If a point on the wheelhas a centripetal acceleration of 1.2 m/s^2, what is the point's tangential speed?

2007-10-26 04:46:20 · 2 answers · asked by Pascal 4

If we are going around a corner in a fast car, we feel like we are being thrown outward, we call it outward centrifigal force. But in terms of Newton's laws this false force doesn't exist. Can you explain why?

Hint. start with Newton's first law.

2007-10-26 04:39:28 · 6 answers · asked by Pascal 4

what is its average angular speed in rad/s?
if two people were on it one at 4.0 m and one at 5.0 m from the center, what would there their tangential speeds?

2007-10-26 04:36:15 · 2 answers · asked by Pascal 4

Is there any good sites explaining the physics of air bags, this is for a research assignment. Any ideas, or explanations would be appreciated.

2007-10-26 04:16:52 · 1 answers · asked by Anonymous

what giudlines help you think that your answer is right.

2007-10-26 03:45:12 · 1 answers · asked by Anonymous

once u find the center of a cell or atom u come across mostly space right? so whats inside that space? do u ever get to an actual center point of an atom? or would it go on forever into its self? i think u know what i mean... any ideas?

2007-10-26 03:43:56 · 5 answers · asked by Anonymous

2007-10-26 03:42:11 · 8 answers · asked by Anonymous

In an article today, 1/3 of Americans believe in ghosts, so I ask: at the atomic level, just what are ghosts comprised of? If people can see them and/or feel them, they must be comprised of atoms, but what kind would you figure?

2007-10-26 03:21:52 · 8 answers · asked by Expat 6

2007-10-26 03:17:04 · 10 answers · asked by ralph 1

2007-10-26 02:57:32 · 3 answers · asked by ralph 1

probably his short bio and contributions..help plz..

2007-10-26 02:50:26 · 1 answers · asked by nep_boi 2

what is the speed of dark .. i want a real answer thistime

2007-10-26 02:39:28 · 10 answers · asked by fredisred08 1

If antimatter and matter collide, annihilate each other and turn into energy, can we do it in reverse?

2007-10-26 02:14:00 · 6 answers · asked by honourableone 3

We broke the atom... now it's quarks, will this ever end? or would we keep on breaking the constituents.

2007-10-26 01:55:19 · 1 answers · asked by BigG 2

Mr Smith has a 3kW. water heater containing 120kg. of water initially as 20°C, and a clock radio which consumes 5W. No other appliances are using any electricity. There is 41p. of credit remaining on his electricity meter.

The alarm is set to sound after 8 hours, but if the meter runs out sooner than that then Mr Smith will oversleep.

What is the hottest temperature that his thermostat could be set to without running the electricity meter out of credit?

Specific Heat Capacity of water = 4200 J kg-1 K-1.
Price of electricity = 8p/kWh.
Assume the water heater is thermally insulated, and neglect its own heat capacity.

2007-10-26 00:58:35 · 1 answers · asked by sparky_dy 7

what are called molicular orbital is there any existance of this kind of orbital in chemistry.

2007-10-26 00:21:49 · 4 answers · asked by Anonymous

a drive belt has a power P proportional to Tv - (w v^3)/g

v is speed of belt, T is tension and w is weight per unit length of the belt.

find the speed at which power is transmitted??

i am totally lost with this, the only thing i supposedly know is that differentiation is involved although i dont know what with respect to what.

2007-10-25 23:28:38 · 1 answers · asked by fpa06mr 5

The electric field in a 2.0 mmX 2.0 mm square aluminum wire is 0.0012 N/C. What is the current in the wire?

2007-10-25 22:39:53 · 1 answers · asked by biscuits 2

A train slows down as it rounds a sharp horizontal turn, slowing from 97.4 km/h to 47.8 km/h in the 12.9 s that it takes to round the bend. The radius of the curve is 136 m. Compute the acceleration at the moment the train speed reaches 47.8 km/h. Assume that it continues to slow down at this time at the same rate.

FIND: Magnitude & Direction °

2007-10-25 22:24:33 · 1 answers · asked by Justin 3