Physics - September 2006

2006-09-19 09:19:27 · 12 answers · asked by mickey 2

Can you tak a clear bottle, blow cigar smoke into it, put a cork on it really fast, and be able to see the smoke inside the bottle as long as the cork in secure? Will the smoke somehow dissappear overtime?

2006-09-19 08:20:40 · 6 answers · asked by Josh 3

An RC circuit has one resistor R = 6.7kohms and one capacitor C = 6.0micro farads (F). The capacitor is at voltage V0 at t=0, when the switch is closed. How long does it take the capacitor to discharge to 1.0 percent of its initial voltage?

Help is appreciated.

2006-09-19 08:08:06 · 4 answers · asked by Anonymous

At t = 0, a stone is dropped from a cliff above a lake; 1.8 seconds later another stone is thrown downward from the same point with an initial speed of 41 m/s. Both stones hit the water at the same instant. Find the height of the cliff.
m

2006-09-19 08:02:06 · 6 answers · asked by lovelee252 1

Well I was studying and came up with this example, which I cant solve.

A 70kg astronaut is loaded so heavily with equipment that on Earth he can jump only to a height of 10 cm. How high can he jump on the moon? The force generated by the legs unloaded is twice the weight of the person Aka 2W.

2006-09-19 07:58:52 · 2 answers · asked by storyguy13 2

2006-09-19 07:55:50 · 6 answers · asked by Anonymous

A. 314 J
B. 6,573 J
C. 1,314,718 J
D. 4,187,000 J

Any help would be greatly appreciated.

2006-09-19 07:51:39 · 3 answers · asked by Katherine M 1

2006-09-19 07:40:15 · 4 answers · asked by Wim 2

2006-09-19 07:31:55 · 7 answers · asked by Wim 2

I think I did. And then it came true.

2006-09-19 06:55:43 · 17 answers · asked by donkiemaster2000 1

2006-09-19 06:42:34 · 3 answers · asked by Anonymous

You are a passenger in a car and not wearing your seat belt. Without increasing or decreasing its speed, the car makes a sharp left turn, and you find yourself colliding with the right-hand door. Which is the correct analysis of the situation and why?

A. Before and after the collision, there is a rightward force pushing you into the door.

B. Starting at the time of the collision, the door exerts a leftward force on you.

C. While the car is turning, a force throws you to the right, where you hit the door.

2006-09-19 06:42:06 · 11 answers · asked by Anonymous

It bouces up and down continuously from bottom to top. Why does it do this? Please back your answer up with hard evidence, possibly a website explaining the phenomenon. If it is the bubbles pushing the grape UP, why don't the bubbles KEEP it there? Why does it come back down again? Why doesnt it just sit somewhere in the middle of the glass?

2006-09-19 06:35:46 · 7 answers · asked by Anonymous

2006-09-19 06:11:58 · 6 answers · asked by Anonymous

since in quantum cryptography the care is taken only while distributing the key and the info is sent over an unsecure channel then by applying various key combinations we can decode the info as how we expect things to be decoded by the use of quantum computers. then how is quantum cryptography unconditionally secure when it is not computationally secure.

2006-09-19 05:22:13 · 4 answers · asked by rashed 1

In an historical movie, two knights on horseback start from rest 74.3 m apart and ride directly toward each other to do battle. Sir George's acceleration has a magnitude of 0.264 m/s2, while Sir Alfred's has a magnitude of 0.300 m/s2. Relative to Sir George's starting point, where do the knights collide?

2006-09-19 05:15:50 · 4 answers · asked by Anonymous

please can u give as many properties of matter as possible about 20 will be fine or any amount you can

2006-09-19 05:14:50 · 7 answers · asked by marissa b 1

2006-09-19 05:09:34 · 6 answers · asked by lonelysky0809 1

2006-09-19 05:08:11 · 8 answers · asked by lonelysky0809 1

Consider a voltaic cell kept in an open circuit.Now tell me in the following regions,will the electric field exist/not exist and why?
i)Inside the voltaic cell
ii)Outside the voltaic cell.

2006-09-19 05:05:55 · 4 answers · asked by i_Abhishek 2

2006-09-19 04:22:20 · 7 answers · asked by Jimbo 6

I have a no frost fridge with a freezer compartment. When I put water in the ice trays into the freezer they turn into ice after a couple of hours. If i do not use the ice for a couple of weeks, the ice starts to shrink and then it disapears from the ice tray, why? where does it go?

2006-09-19 04:21:54 · 11 answers · asked by Anonymous

cells? is this forming of a cell a compound. Why do we need to take in oxygen atoms for ATP. Why is the sun and light given plants food Is light a atom it self and if so if it came in contect with antmatter would it be the same result with are matter. in theorys on dark matter or dark enrgy?

2006-09-19 04:16:54 · 3 answers · asked by Anonymous

2006-09-19 04:09:05 · 14 answers · asked by GUNNS 1

A bee flying around the lamp in a train without seating anywhere is travelling with us, whereas we are sitting in a seat or a sleeper.

2006-09-19 04:08:16 · 11 answers · asked by I D 1

2006-09-19 04:05:55 · 17 answers · asked by ღ 4

Hi. How hard is the vacuum over the mercury in a barometer. Unless the mercury goes into some level of vapor phase I would think it was nearly perfect.

2006-09-19 04:03:25 · 4 answers · asked by Cirric 7

I refer you to Chapter 4 of The Elegant Universe (but the experiments are in many references).
1. Figure 4.10 showing Feynman's 'every possible path' would seem to fall victim to astute philosophical scrutiny. If each photon could follow every possible path on the source side of the barrier then wouldn't all photons passing through the slits also be constrained to follow every possible path on the event side of the barrier (in any reducto ad adsurdum) and therefore yield no pattern at all? Due to random distribution wouldn't the pattern be that of a 'normal curve'?
2. Is it technically possible to conduct the experiment as shown in Figure 4.8 and have results meaningful on the quantum level considering reflection and refraction caused by the inside edges (the barrier must be thicker than a photon) of the slots on a quantum fluff level, much less considering the effects of the uncertainty principle and unpredictable nature of restricted particles?
Have these experiments been done?

2006-09-19 03:59:40 · 4 answers · asked by Nightstalker1967 4

i've heard that it's a surprizingly small amount. don't really know how to look this one up.

2006-09-19 03:45:10 · 3 answers · asked by stockett87701 1

And if sound travels indefinitely, why dont we hear stars exploding?

2006-09-19 03:41:12 · 14 answers · asked by Jimbo 6