Physics - December 2006

In the 1500's the Frigates and Galleons were able to cross the Atlantic ocean from either direction. I was lead to believe the masts and sails were positioned so they could travel foreward against the wind. Is this true? Or would they just have to maintain the best heading they could until more favorable wind conditions came?

2006-12-02 14:14:07 · 6 answers · asked by ? 1

so my teacher is testing us on these two topics...
need an any length of explaination of energy and how it relates and differs from momentum...
i really need to be tutored on energy...but my teacher doesnt teach us too well

2006-12-02 14:12:30 · 3 answers · asked by EstacioA 1

Could time actually be non-existant? it is just a measurement? how can it be a thing than

2006-12-02 14:00:27 · 5 answers · asked by conƒused-little-man 2

At a carnival, you can try to ring a bell by striking a target with a 9.00-kg hammer. In response, a 0.400-kg metal piece is sent upward toward the bell, which is 5.00 m above. Suppose that 25.0% of the hammer's kinetic energy is used to do the work of sending the metal piece upward. How fast must the hammer be moving when it strikes the target so that the bell just barely rings?

Please show your work with all formulas used. (conservation of energy formula I believe)
Show your answer in terms of the variables given and a numerical answer.

Thanks.

2006-12-02 13:51:17 · 3 answers · asked by blcklabelx 1

2006-12-02 13:31:23 · 27 answers · asked by tallat m 1

The most basic law of thermodynamics states that energy can neither be created nor destroyed: http://en.wikipedia.org/wiki/Energy.

Since it is obvious we all have body energy to do work, what happens to this body energy once you die since it cannot be destroyed nor created??

(please don't give me a dumb answer like static electricity or anything like that)

2006-12-02 12:59:07 · 20 answers · asked by ohnoitsadel 2

2006-12-02 12:49:04 · 2 answers · asked by Sequel log item 3546 Pub Search 1

A sphere of mass 0.3 grams is suspended from a 30cm cord. A steady horrizontal breeze pushes the sphere so that is makes an angle of 37 degrees with the vertical. Find the magnitude of the wind force and the tension in the cord.

Best answer gets 10 points!!
Please show how you got to the answer
Have Fun!!

2006-12-02 12:38:37 · 6 answers · asked by Brody 3

2006-12-02 12:37:53 · 10 answers · asked by michaeljoyzer 2

A sphere of mass 0.3 grams is suspended from a 30cm cord. S steady horrizontal breeze pshes the sphere so that is makes an angle of 37 degrees with the vertical. Find the magnitude of the wind force and the tension in the cord.

Best answer gets 10 points!!
Please show how you got to the answer
Have Fun!!

2006-12-02 12:37:48 · 6 answers · asked by Brody 3

If a two legged object (such as a person) were to attempt to run on the top of liquid water (like a lake), how fast would they have to run to be able to acomplish it?

2006-12-02 11:41:50 · 10 answers · asked by Anonymous

i have to include: motion, force, center of gravity, lever, inertia, friction, and resistance. my bobblehead is a pipecleaner with a head on one end and lil fuzz balls on the other (counter weights). its a book worm. we drilled a hole thru 2 pieces of wood, put a hook in the hole, and the worm hangs on the hook and bobbles. its saturday, and the paper is due on monday!! please help me, i have NO clue what to write!!!

2006-12-02 11:12:39 · 3 answers · asked by yknsblondie_17 1

no electricity means no fan... one idea could be air, but blowing air is too simple, and i might get points taken off of my project...

2006-12-02 10:33:36 · 12 answers · asked by Prii 1

A 1.2kg object hanging from a spring of force constant 305N/m oscillates with a maximum speed of 33cm/s. (Choose U=0 when the object is in equilbrium). If the maximum displacement is 2.1cm, the total energy of the system is 0.065J and the gravitational potential energy is -0.247J.

What is the potential energy in the spring?

2006-12-02 10:13:23 · 3 answers · asked by Dan L 1

2006-12-02 10:06:31 · 14 answers · asked by Nick H 2

Physics speaks of the conservation of energy, etc....how does all of this fit together with the science of information

2006-12-02 10:03:59 · 2 answers · asked by stevetempo 1

a bullet is fired horizontally @ a speed of 200m/s at a target that is 100m away. help me to calculate:
-how far the bullet has fallen when it hits the target
-the angle that it then makes with the horizontal.

step up step methods plz. thx
i am only intersted in answers that uses suvat equations. acceleration shud be taken as 9.8ms^2

2006-12-02 09:32:13 · 1 answers · asked by BJ 1

If you can connect three 9V batteries in series to obtain a 27V DC source, can you do the same thing with AC input to DC output power supplies? What are the potential problems with the power supplies themselves (ie: can you ruin them doing this)?

Can you stack unlike DC outputs? Will a 12VDC supply connected in series with a 4.8VDC supply give you a 16.8VDC supply? Are there potential problems with the supplies themselves if each has different power outputs, say 12VDC @ 500 mA with a 4.8VDC @350 mA?

2006-12-02 09:23:36 · 4 answers · asked by Anonymous

I know it got something with pressure or electricity...

2006-12-02 08:53:49 · 5 answers · asked by delorayn1 2

it has to do with physics and chemistry

2006-12-02 08:16:49 · 3 answers · asked by Chana M 1

A 3.0 m long rigid beam with a mass of 110 kg is supported at each end. An 80 kg student stands 2.0 m from support 1. How much upward force does each support exert on the beam?

Diagram: http://i137.photobucket.com/albums/q208/infinitbelt/p13-56.gif


I tried doing T = -(190 kg)(9.8)(-0.5 m) = 931 but that appears to be the wrong answers for support 2.

Any ideas?


Thanks!

2006-12-02 08:08:40 · 2 answers · asked by Anonymous

A copper block is dragged across a wooden desk by a spring scale. given that the copper block has a mass of 6kg and that the spring scale reads 12N, find the coefficient of kinetic friction.

what would the answer be?

...Thanks

2006-12-02 07:39:20 · 3 answers · asked by knicksfan000 1

2006-12-02 07:34:34 · 2 answers · asked by eunice c 1

2006-12-02 07:30:25 · 7 answers · asked by eunice c 1

insect A has mass 250g and is moving south at 10.0 cm/s , while insect B is 120g initially moving north at 60.0 cm/s . (Answer must be in Joules)

2006-12-02 07:27:57 · 3 answers · asked by Anonymous

2006-12-02 07:25:10 · 4 answers · asked by eunice c 1

Please also explain why or why not?

2006-12-02 06:47:56 · 4 answers · asked by Slightlynorth 2

I heard that WW2 German snipers had 5mm tempered peaks on their helmets to prevent pentration but wouldn't the force bust a neck anyway?

2006-12-02 06:35:29 · 4 answers · asked by Thx 4 All The Fish 2

we knew that deuterium is primarily used as fuel for the rocket propelled engine of a rocket ship. We also knew that Norway is the only country that is extracting deuterium, so i want to know if the deuterium present in the Philippine deep can also be extracted or not. This has been a very big question that the Filipino people would wanted to know. The Filipino people would be gratified if this can be answered with a positive result. The presence of deuterium in the Philippines brings hope to the Filipino populace way back 30 years ago but suddenly the hope was diminished because there is no country like the U.S. or Japan that can help us explore this very precious mineral. At present, the Filipino people does not have the technical ability to extract this, so we are asking for the support of any country that can help us find ways to solve this problem. I knew personally that this is possible because, how come that Norway could pump out their deuterium and we couldn't.It's a shame!

2006-12-02 06:33:38 · 4 answers · asked by spiderbenj 1

2006-12-02 06:16:07 · 9 answers · asked by Isabel P 1