Physics - June 2007

"photon" model?

2007-06-09 19:55:00 · 3 answers · asked by Anonymous

you are on board a ship. A lighting bolt strikes your ship and you see it strike your fork on the table. but the fork isn't magnetised. instead, it is the spoon and knife which are magnetised. their handles have reverse polarities. why are steel cutleries arranged in a certain orientation not magnetised by a huge electric current?

2007-06-09 19:46:42 · 3 answers · asked by destinysapphire99 1

Plz check this link to see my circuit.
http://img124.imageshack.us/img124/9342/12631269km1.png
Can u solve it?
It's very important.
Every <
find RT=?

thnx

2007-06-09 19:46:13 · 5 answers · asked by eri 1

The morning after a winter ice storm in Dallas, a 1400 kg automobile going west on Chestnut Street at 35.0 km/h collides with a 2800 kg truck going south across Chestnut Street at 50.0 km/h.

Part A: If they become coupled on collision, what is the magnitude of their velocity after colliding? You can ignore forces between the vehicles and the icy road.

Part B: What is the direction of their velocity after colliding?

NOTE: I got 3.86 for part A but it doesnt seem right, can someone check my awnser. Maybe I am doing it wrong. Someone explain how you do both part a and b.

2007-06-09 19:07:46 · 4 answers · asked by garagelu 2

a tortoise can run with a speed of .1 m/s and a hare can run 20 times as fast. in a race, they both start at the same time but the hare stops to rest for 2.0 minutes. the tortoise wins by a shell (20 cm). a) how long does the race take? b) what is the length of the race?

2007-06-09 17:45:42 · 3 answers · asked by lenny b 1

If a cat always lands on its feet and buttered toast always lands butter side down. Could I get a cat and attatch one piece of buttered toast butter side up to each paw of the cat then picked the cat up and dropped it would the butter side up toast and the cat paws kinda act like like poles of a magnet and repel each other leaving the cat to kinda levitate a few inches above the floor or possibly rotate constantly along its latitudinal axis thus creating an anti gravity machine?

2007-06-09 17:42:11 · 6 answers · asked by Anonymous

every action has an equal and opposite reaction,,

then why do the objects move?
in the sense,,if an object is moving in 3 N force,,then there is an equal and opposite force ,,so why does it continue to even move in any force,,???

if a rocket is moving upwards,,some force pushes it downward,,which is equal in magnitude,,and opposite in direction,,so why does it still moves upward???why does it even move??
why it doesnt stop without any motion??

it really seems to be unclear abt newton's 3rd law of motion,,even my physics teacher couldnt answer,,he was finding excuses to avoid this question,,
can u explain me the newton's 3rd law of motion clearly??

2007-06-09 16:59:31 · 14 answers · asked by gunkedar 2

So why are scientists creating theory on subatomic ?

2007-06-09 16:19:28 · 10 answers · asked by Anonymous

2007-06-09 15:03:57 · 7 answers · asked by Anonymous

what stops them as the move through medium?

2007-06-09 14:51:57 · 5 answers · asked by Ha!! 2

how do we really know what time is, how do we really know what an hour is or even an day is? We cant measure time in our head, only with a clock. we depend on others to tell us the time, so how do we know that the people that tell us what the time is, is lying or not. Who set all the clocks in the first place. Do you get what i am saying?

2007-06-09 14:50:59 · 13 answers · asked by john6778890 2

When a 60 kg person climbs into a 1020 kg car, the car's springs compress vertically by 2.9 cm. What will be the frequency of vibration when the car hits a bump?

2007-06-09 13:11:25 · 2 answers · asked by tjmierzwa 2

A gardener exerts a force of 1.5E2 N [22 derees below the horizontal] in pushing a large 18 kg box of flower seeds a distance of 1.6 m. The coefficient of kinetic friction between the box and the floor is 0.55.
The answer is supposed to be 1.4 m/s.

2007-06-09 13:02:02 · 1 answers · asked by Malvern100 1

when a person is alone in a small room where its really quiet he might hear some kind of ear piercing sound
why is that?

2007-06-09 11:54:30 · 4 answers · asked by ya 1

Why cant we pick up our self's if we are sitting in a chair with our legs also on top, what is stopping us from doing this?

2007-06-09 10:39:29 · 4 answers · asked by Anonymous

The relative humidity should remain about the same but the air temperature will rise from natural inefficiencies in both.

Am I right?

2007-06-09 10:05:01 · 3 answers · asked by Anonymous

I would appreciate any helpful input on this physics problem. I am really confused on this one. Thanks for any help :)

Consider a series RC circuit for which R = 9.0 MΩ, C = 8.0 µF, and E = 27 V. Find the charge on the capacitor 15 seconds after the switch is closed (The answer is in µC).

2007-06-09 10:04:23 · 2 answers · asked by Anonymous

Is an atom technicly stationary; if so would that mean absolute zero which is said to be impossible?

2007-06-09 09:39:14 · 7 answers · asked by Anonymous

Given that radio activity is energy why can we not use the energy given off by the spent rods (I think theyare called that) from a nuclear power station or a submarine

2007-06-09 09:27:55 · 5 answers · asked by Scouse 7

as in, what does the directions mean when i am asking a yes or no question???

clockwise.... anti-clockwise..... side to side.... etc... please help!!!

2007-06-09 08:57:29 · 5 answers · asked by Gia Star 2

2007-06-09 08:51:09 · 12 answers · asked by Grinning Football plinny younger 7

Does light weigh anything, and if so, how do you measure it?

2007-06-09 08:33:48 · 25 answers · asked by twopigbus 1

2007-06-09 08:09:46 · 6 answers · asked by beygi 1

1.a) use the method of components to find the magnitude and direction of the vector sum R1 = A + B. The vector A = 7.56 m at an angle o=180 from the positive horizontal axis, and B=14.3 m at an angle g= 70.3 from the positive horizontal axis. what is the angle, i, from the positive horizontal axis of the vector sum R1?

B) what is the magnitude of the vector difference R2, where R2=A-B? what is the angle H of the resulting vector?

C) what is the magnitude of the vector difference where R3=B-A? What is the angle G of the resulting vector?

Just need the answer no need for simplification. Thanx !!

2007-06-09 07:54:54 · 1 answers · asked by f4bulous1985 2

...then won't increased levels of CO2 in the atmosphere actually cool the planet by reducing the amount of heat that gets in? By that same logic, won't reducing CO2 levels actually warm the planet up even more?

2007-06-09 07:33:03 · 5 answers · asked by Richard S 5

E=MC^2 is the bit in special relativity that laymen like me had heard of. After reading a bit on SR I understand (at a primitive level) the postulates and consequences re spacetime and EM radiation. The descriptions then jump to E=MC^2 without any explanation as to where it fits in and why c is again the critical factor. I am interested to kow what and where the link is connecting relativity as in c and frames of reference and relativity as in c and energy.

2007-06-09 07:26:06 · 3 answers · asked by Andrew H 2

are hiroshima and nagasaki still radio active?

2007-06-09 06:42:00 · 4 answers · asked by Anonymous

2007-06-09 06:39:07 · 18 answers · asked by KELSEA K 1

and i saw the proofes that it's right and i saw the proofs that it's wrong...... i think it's right .. what about u and why?

2007-06-09 06:33:57 · 4 answers · asked by mhd1995 1

2007-06-09 06:26:45 · 2 answers · asked by Anonymous