Physics (Science & Mathematics) - February 2007

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which is harder to move? explain your reasoning.?

A. a woodend box across a wooden floor
B. a steel box(of the same weight) across a steel floor

values for wood on wood = statitic friction = .58 kinetic = .40
values for steel on steel .75 .48

2007-02-25 02:30:21 · 6 answers · asked by howdy 2

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Why do we need measurements in science?

2007-02-25 02:25:09 · 3 answers · asked by Anonymous

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An elevator (mass 4025 kg) is to be designed so that the maximum acceleration is 0.0900g.?

An elevator (mass 4025 kg) is to be designed so that the maximum acceleration is 0.0900g.
What is the maximum force the motor should exert on the supporting cable?
N
What is the minimum force the motor should exert on the supporting cable?
N

2007-02-25 02:23:17 · 1 answers · asked by nafiseh g 1

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what is relation between in time machine and in matrix?

matrix is a program and time machine is an instrument by which we can travel through time with speed of light

2007-02-25 02:17:30 · 6 answers · asked by samar k 1

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Where does sound end?

Is it absorbed, or does it travel through space forever?

2007-02-25 02:14:16 · 9 answers · asked by fredinski_1 1

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Where did spiders learn how to build webs.?

I am not a mathematician but i imagine the maths involved would fill volumes and the engineering impossible by humans.When you watch a spider spin a web it makes our human advances in science and physics seem pitiful.

2007-02-25 02:10:32 · 8 answers · asked by john j 1

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physics question - help please?

A gas is contained in a chamber such as that in Figure 15.5. Suppose the region outside the chamber is evacuated and the total mass of the block and the movable piston is 135 kg. When 2050 J of heat flows into the gas, the internal energy of the gas increases by 1735 J. What is the distance s through which the piston rises?
___________ m

figure 15.5: http://s29.photobucket.com/albums/c252/nevatrav/?action=view¤t=15_05.gif

2007-02-25 02:01:40 · 3 answers · asked by neverconsiderlifeonascale 1

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Can anyone help me with this please?

http://aycu17.webshots.com/image/10376/2001049186150686768_rs.jpg

2007-02-25 01:55:22 · 2 answers · asked by Anonymous

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Does it help in getting an egg full boiled faster by adding a pinch of salt with the water? How?

2007-02-25 01:53:26 · 3 answers · asked by baban 2

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Math vs Observation?

How often do math calculations differ from observations?
Which is then is the accepted part of an experiment?
The math or the observation?

2007-02-25 01:51:12 · 2 answers · asked by Tony 2

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carry out an investigation of the relation between the length of a metallic conductor e.g nictrome wire?

and its resistor for above.
junior cert science experiment to find out

2007-02-25 01:42:07 · 2 answers · asked by Caroline C 2

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How does an electrical circuit work?

2007-02-25 01:36:48 · 5 answers · asked by murphy 2

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error calculation help?

in a table of results i have columns of mass, tension, possible minimum mass, possible maximum mass, possible minimum tension, possible maximum tension, negative errors of tension and positive errors of tension. however i cant work out how to get the negativ and positive errors of tension. any help? thanks

2007-02-25 01:34:27 · 1 answers · asked by Andy P 1

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why is there a sudden drop of binding energy around low mass in nuclear binding energy?

2007-02-25 01:33:32 · 1 answers · asked by nerdsss 1

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why is there a sudden drops of binding energy in nuclear binding energy?

2007-02-25 01:30:16 · 1 answers · asked by noob 2

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What type of lever is capstain?

2007-02-25 01:15:45 · 6 answers · asked by Anonymous

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What type of lever is capstain?

2007-02-25 01:14:32 · 1 answers · asked by Anonymous

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What is the difference between science and technology ?

2007-02-25 01:10:33 · 5 answers · asked by Zarina J 1

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If iron and copper rods are held over a flame, the tip of iron rod becomes red hot while that of copper doesn'

2007-02-25 01:09:31 · 3 answers · asked by Avinash S 1

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why is there a sudden dropping in the energy binding curve?

2007-02-25 01:07:44 · 1 answers · asked by nerdsss 1

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Specific Heat Capacity?

What is the final temperature of 100 g of water at 25 K is mixed with 40g of water at 90 K (SHC water 4200 J/kg K)?

2007-02-25 01:05:47 · 3 answers · asked by Chocolate Strawberries. 4

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what should the world in future use as a renewable energy source?

2007-02-25 00:56:20 · 7 answers · asked by abdur r 1

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How do you do this problem? It's about a stone being whirled around.?

I really don't know how to do this problem, can someone please teach me? Also, PLEASE explain to me how to do them. I really want to know how to do them.

http://aycu25.webshots.com/image/9504/2001750964479605721_rs.jpg

2007-02-25 00:34:06 · 1 answers · asked by Anonymous

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How can you make an aerofoil (airfoil) using materials at home?

Or things that are easy to buy in normal shops.
Just a small one, to test lift, i'm not trying to build a plane.

2007-02-25 00:27:40 · 2 answers · asked by THJE 3

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Is there a way to measure the amount/quantity of static electricity being used? what device should be used?

2007-02-25 00:26:27 · 1 answers · asked by Anonymous

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In your opinion, did Newton discover gravity or invent it?

Gravity is, in my opinion, a concept or a theory - an abstract idea. You cannot observe gravity, but you can observe its effects. The theory was invented, and facilitated calculations to confirm the observed effects. Personally, therefore, I consider gravity, or more correctly the Theory of Gravity, to be an invention.

2007-02-24 23:26:26 · 26 answers · asked by Anonymous

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