Physics - June 2007

2007-06-17 07:57:00 · 3 answers · asked by lighted_mind 1

If I had 10 litres of helium in a balloon how much will it carry. I know the weight of the balloon will effect the payload but you simply deduct the balloons weight from the heliums lift.

2007-06-17 07:54:41 · 3 answers · asked by mort_the_apprentice 2

A basketball player is throwing the ball in the air. The Basketball is thrown directly upward from the ground and returns to its starting postition in 0.80 secs.

a) How long did the ball take to reach its maximum hieght?

b) What was the initial velocity of the ball?

c) How high did the ball go?

2007-06-17 07:45:59 · 3 answers · asked by None 1

Physics question?
iF u place a stethoscope on an unmagnetized iron nail and then slowly move a strong magnet toward the nail, you can hear a faint crackling sound use the concept of domains to explain the sound ?

2007-06-17 07:36:19 · 1 answers · asked by Anonymous

Theoretically, if a human accelerated gradually to the speed of light, and sustained that speed for a given period of time, would it be humanly possible to withstand the g-forces exerted?

Also, if you know, please give the approximate g-force rating lightspeed would exert in such a manner? Thanks

2007-06-17 07:23:11 · 11 answers · asked by B Z 4

Is there a way to find out where I asked(Im new to this) Thank you.

2007-06-17 07:22:04 · 3 answers · asked by ididittu 1

1) In order to have a vector quantity, what two things do you need to show?
2) What can you say about the slope of a line in a distance-time graph?
3) When calculating the area under a speed/time graph, what are you actually determining?

2007-06-17 07:18:23 · 2 answers · asked by Anonymous

a 2300kg rocket shuts off its engine 494km above earths surface.its velocity at burnout is 3000m/s directly upward.ignoring air resistence, what maximum height will the rocket reach?
the answer is 1.1 x 10^6 metres
thx!!

2007-06-17 07:16:51 · 1 answers · asked by Anonymous

I have to do a demonstration on MagLev trains, and I was wondering how I could demonstrate this.

I was thinking of getting 2 donut magnets and slipping them thru a wooden dowel so the top magnet levitates over the bottom one.

Any other ideas?

2007-06-17 07:16:06 · 2 answers · asked by Hindu Guy 2

how long would it take for the penny to reach the ground? AND
If the penny hit the roof of a parked car what, if any, damage would be done to the car's roof?

2007-06-17 06:31:27 · 11 answers · asked by Anonymous

2007-06-17 06:27:06 · 19 answers · asked by nick 1

2007-06-17 06:22:53 · 6 answers · asked by wondering 1

2007-06-17 05:47:18 · 3 answers · asked by vignesh 1

What happened 14.7 billion years ago is not helping with the weed problem on my farm. seems if scientist could even alter the genetics of these agravating weeds and turn them into food producers we would be better off?

2007-06-17 05:43:51 · 2 answers · asked by james h 2

New Scram-Jet engine tested in Australia can reach Mach 10..sow what is that in MPH?

2007-06-17 05:10:13 · 4 answers · asked by Robert B 7

2007-06-17 05:03:24 · 8 answers · asked by muchukund 2

can u comment on,,

the effect thermal energy acting on an objects' surface area,colour,shape,size and the material itself?

like black color attracts more thermal energy,,

2007-06-17 02:51:06 · 1 answers · asked by gunkedar 2

when will it reach to 3/4h from the time we drop it?
1)1/2t 2)3/4t 3)2/5t 3/7t

2007-06-17 02:03:39 · 2 answers · asked by Nb 2

the vectors
u = (-1, -2, 1)
v = (3, 0, -2)
w = (5, -4, 0)

2007-06-17 01:35:09 · 4 answers · asked by whatever 1

I was doing my physics revision for a test tomorrow, and one of the questions was whether the forces acting upon a satellite in geostationary orbit were equal or not. The textbook says that they're not, as when a force causes something to change direction it requires constant acceleration. I think that they would be, as it is not a force causing it to change direction, but a combination of the gravitational orbit of the planet and the kinetc energy of the satellite that causes it to curve. My Dad also thinks that they would be balanced, too. Also, where would the satellite be getting acceleration from in the first place?

Best Answer given out as applicable, of course.

2007-06-16 22:56:59 · 6 answers · asked by Peter B. 2

I carried out an experiment to find the friction of different materials.

I have an angled surface. I rolled a pingpong ball down the surface and recorded specifically how long it took to reach the bottom. The material that friction I wanted to measure was placed on top of that surface.

My aim of the experiment was: To measure the friction of different materials
So with this data, how would i produce my results. Be very specific, as I'm not the greatest scientific mind.

2007-06-16 21:50:35 · 2 answers · asked by Rahhot 2

2007-06-16 21:10:03 · 3 answers · asked by david d 1

I need a vague sentense about why AC is used for radio recievers. I came up with this, but i'm not sure if it's accurate.

Radio’s are dependant on the oscillation of electrons in the antenna caused by a radio wave producing AC electricity with a frequency the same as that of the radio wave.

2007-06-16 20:58:04 · 5 answers · asked by Anonymous

I notice when I stop in a car, the front dips down. It's not just my car, it's all vehicles with brakes. What are the physics behind this frontal dip?

2007-06-16 20:37:28 · 8 answers · asked by Ian 2

?

2007-06-16 20:09:57 · 6 answers · asked by Hector C 1

voltage like 220 440

2007-06-16 19:52:19 · 8 answers · asked by gaurav s 1

Is there any reason that we should believe the String Theory?
And also can a powerful microscope be invented ever in the near or distant future to see smaller particles than "Quarks"?

2007-06-16 19:38:01 · 7 answers · asked by Anonymous

2007-06-16 19:15:44 · 16 answers · asked by eikeren1 1

Can someone give me an easy-to understand lowdown of the Direc equation? (Quantum Physics)

2007-06-16 19:09:26 · 1 answers · asked by late_night_movie 1

An intro physics question... should be pretty simple and I'd really appreciate any help!

The mast of a sailboat is supported at bow and stern by stainless steel wires, the forestay and backstay, anchored x = 10.0 m apart.

a) The L = 12.4-m long mast weighs 817 N and stands vertically on the deck of the boat. The mast is positioned 3.70 m behind where the forestay is attached. The tension in the forestay is 520 N. Calculate the tension in the backstay.

b) Calculate the force that the mast exerts on the deck.

Thanks so much. I will be checking frequently for answers. Thank you so so so much!

2007-06-16 18:15:56 · 5 answers · asked by YoDaddyHoe 1