Physics - February 2007

My dog ran out of the house and it took . one hour an a half later I caught the dog, at a park three miles East and four miles South of my house. What was the net distance traveled by my dog? What was my dog's average speed?

2007-02-01 08:13:15 · 3 answers · asked by nana g 1

Assume that 4.20 x 106 kJ are needed to heat a swimming pool. If this energy is derived from the combustion of methane (CH4) at standard conditions (25 oC and 1 atm) what volume in liters of methane must be burned?




The heat of combustion of methane is 889.967 kJ/mol. The density of methane is 0.0680 kg/m3


Enter a numeric answer only. Do not enter units.

2007-02-01 08:11:38 · 1 answers · asked by Whatever 1

the micrometer is what part of a millimeter?

2007-02-01 08:05:33 · 2 answers · asked by flaca 3

I know there is no limit to how many zeros we can write between "1" and "hertz". Is there a limit on what can actually be emitted based upon the properties of known elements (or any other criteria)?

2007-02-01 07:54:57 · 10 answers · asked by A Toast For Trayvon 4

I was talking to someone who read a book and remembered the distance ..or measurement of stars etc .
I want to learn it so when people ask me i have an idea of it all .
it was neat .. light travels at ..such and such speed ..or .. if it is this far away it takes the light this amount of time to reach us.

any websotes or lessons someone knows or from your own experiences?

2007-02-01 07:47:30 · 6 answers · asked by Chef Dane 2

any websites you can find?

2007-02-01 07:42:31 · 1 answers · asked by Chef Dane 2

2007-02-01 07:42:26 · 5 answers · asked by jenn 1

Right i really dont understand this but thought someone else on here might! Well i have this worksheet. This is one of the questions see if you get it:

1. Work out the power of these electric fires, to the nearest watt, if they produce 1000 kj in these amounts of time
a) 200 seconds
b) 8 minutes
c)10 minutes

Do you understand them, there are loads more by the way im not tryna get h/w awnsers of people! lol
If you do get them could you please tell me how you worked them out in a easy way to understand as i have 2 worksheets to complete on this lol

Thank You
(10 points will be rewarded)

P.S- I also have these notes
Joules: 1KJ = 1000J
Find P if Wd = 60 J and t = 10

2007-02-01 07:36:33 · 2 answers · asked by § gαввαηα § 5

Further to this question, if displacement and force are given in terms of their i,j and k components, how can the power be calculated?

2007-02-01 07:28:43 · 3 answers · asked by tiri 1

2007-02-01 06:57:27 · 4 answers · asked by goth :) 1

2007-02-01 06:49:18 · 3 answers · asked by naveed 1

Is there a device to slow down the vibration of molecules using microwaves rather than making them vibrate faster? Is this what they call Flash Freezing or is that just another form of the regular refridgeration process?

2007-02-01 06:47:38 · 3 answers · asked by Rust 2

Plz give reference or site.............

2007-02-01 06:45:07 · 1 answers · asked by chandan27_sachin 1

a. A car climbs a steep hill with its speed dropping from 60 km/h at the bottom to 15 km/h at the top
b. A car climbs a steep hill and goes over the crest and down on the other side, all at the same sped of 40 km/h
c. A car climbs a steep hill at the constant speed of 40 km/h
d. A car turns a corner at the constant speed of 20 km/h

2007-02-01 06:36:50 · 8 answers · asked by kacwccj 3

I was just wondering what common, practical inventions Einstein's discvoeries led to. I've heard that they led to things like toothpaste, the atomic clock, and television. Is there anything else he had his fingerprints on?

2007-02-01 06:36:39 · 2 answers · asked by mrfuzzy64 1

what does E mean?
what does = mean?
what does m mean?
what does c mean?
what does 2 mean?

Now alltogether what does it mean?

2007-02-01 06:35:37 · 7 answers · asked by Anonymous

ive looked everywhere and can't find these. a link to where u found them would be helpful. cheers

2007-02-01 06:11:23 · 3 answers · asked by Anonymous

A electron moving along the x axis has a position given by x = 20 te-2.4 t m, where t is in seconds. How far is the electron from the origin when it momentarily stops?

2007-02-01 06:08:41 · 1 answers · asked by In love with love 2

This question has been haunting me since childhood. I don't expect u people to give the correct answer or explanation to me but still let me see.

From our school studies we have studied that this universe came as a result of the 'big bang' of a dense spherical ball. Before that something might have happened and i don't care about that. What i want to know is that when did all these physical activities start taking place. There was no one no god or someone who said " Go! the time starts now" and suddenly everything came into existence. No. But there must have been some kind of start. Did u get to the depth of my question?? Plz give scientific explanations.

I wonder i have never found anybody wondering about this puzzle. But may be some Einstein has already given an explanation to this. If so plz let me know.

2007-02-01 06:00:49 · 15 answers · asked by Anonymous

requires a 81 N horizontal force to set it in motion. However, after the crate is in motion, a horizontal force of 51 N is required to keep it moving with a constant speed. Find the coefficients of static and kinetic friction between crate and floor.

Lets see how fast you can do this one guys ;)

2007-02-01 05:35:42 · 4 answers · asked by cosmo 1

If you know the answer could you explain why please? Thanks

2007-02-01 05:22:04 · 4 answers · asked by Anonymous

What happens to the light;inside the diamond when it's all lit up;by say direct sunlight???...Thanks for your detailed answer...Tom Science 4

2007-02-01 05:10:03 · 2 answers · asked by Anonymous

Thanks for your detailed answer...Tom Science 4

2007-02-01 04:59:17 · 3 answers · asked by Anonymous

What was the change in the potential energy of the system?

2007-02-01 04:52:13 · 3 answers · asked by Anonymous

Ok Genius people.. here is the Question for You:) don't work hard:)

A man dug a hole straight down into the earth and surfaced at the other side of the earth. If he were to jump into the hole, how far down would he fall?

2007-02-01 04:34:48 · 14 answers · asked by kashmala 1

I went round to this guy's house & this guy had a portrait hung over his mantelpiece. I asked him who it was in the portrait to which the guy replied 'Brothers & Sisters have I none but that man's Father is my Father's Son'. Who was in the portrait?

2007-02-01 04:27:40 · 15 answers · asked by BillyBoyNic 1

How is the energy per fission calculated?

2007-02-01 04:24:00 · 5 answers · asked by Anonymous

I ordered Magnetite Crystals from a Rock Shop. Three came from South Africa and I immediately had my epiphany. The tetrahedrons are magnetite crystals. I latter learned that the crystals are Pi the noun. It is written hieroglyph as a twisted loop. Could the Egyptian 's know about magnetism and Electricity?

2007-02-01 04:16:26 · 16 answers · asked by blueridgemotors 6

2007-02-01 04:12:10 · 4 answers · asked by KC O 2

A seagoing crane lifts a sealed safe from a sunken ship in the Great Lakes. The average density of the safe is 5.3 grams/cc and its mass is 120 kg. What is the tension in the ifting cable when the safe is still submerged?

2007-02-01 04:07:54 · 3 answers · asked by ARE JAY 1