Physics - November 2006

I know some have "sling shots", but what I dont understand is if gravity is the answer, how rollercoasters can do loop the loops that are higher than the top of the chain lift where the roller coaster is first released. Example is Kumba at Busch Gardens Tamps, its loop the loop is higher than the point in which the rollercoaster released.....is this possible?

2006-11-14 08:35:44 · 3 answers · asked by Stuart J 2

2006-11-14 08:34:57 · 2 answers · asked by Anonymous

If there was a remote control plane up in mid-air, inside a truck, but it was just still in one place, and all of a sudden the truck started to move, then would the plane move with the air inside the truck, or would it hit the back of the truck since it was still?

2006-11-14 08:28:21 · 3 answers · asked by suniti 2

I'm interested in the curve as a function of the radius r. I have two guesses at this point. Either a parabola or a catenary. I'm not sure about it because I don't fully understand the magnitude of the force that causes the water to move upwards in the first place.

(Assume gravitational force on the water is constant throughout the glass, don't bother to figure in the slight variation from that)

2006-11-14 08:22:43 · 1 answers · asked by Anonymous

I have heard that sailboats can travel faster than the windspeed but nobody has ever been able to tell me how this is possible. Due to the drag of the boat in the water I would think that the boat would always travel slower than the windspeed.

2006-11-14 08:18:06 · 5 answers · asked by Anonymous

I would like to be able to argue this intelligently, but don't know the correct terminology or 'science' behind it. If it's true, than how can this be argued? It seems to me that a burst of electricity at each turn on may increase the cost of per/timeframe usage, however maybe not with today's more energy efficient bulbs. Anyhow, is it true that it costs more to switch than to keep it on, and if so, is there a time when both equal out?

2006-11-14 08:01:46 · 6 answers · asked by C A 1

of radius, R = 58.05 cm at the bottom. The cube starts from rest and slides freely down the ramp and around the loop. Find the speed of the block when it is at the top of the loop.

A uniform solid cylinder (m=0.530 kg, of small radius) is at the top of a similar ramp, which has friction. The cylinder starts from rest and rolls down the ramp without sliding and goes around the loop. Find the speed of the cylinder at the top of the loop.

2006-11-14 07:46:36 · 2 answers · asked by Anonymous

A 700-N man stands on a scale on the floor of an elevator. The scale records the force it exerts on whatever is on it. What is the scale reading if the elevator has an acceleration of (a) 1.8 m/s^2 up? (b) 1.8 m/s^2 down? (c) 9.8 m/s^2 down?


Please answer all three senarios. Be detailed as possible. Thank you.

2006-11-14 07:38:20 · 1 answers · asked by Katie 2

An elevator starts from rest with a constant upward acceleration. It moves 2.0 meters in the first .60 seconds (that's a decimal in front of the 6, in case it's difficult to see). A passenger in the elevator is holding a 3.0-kg package by a vertical string. What is the tension in the string during the accelerating process?


I'm in a basic high school physics class, and i'm having some dificulty. Can you help? Be as detailed as possible please.

2006-11-14 07:34:18 · 2 answers · asked by Katie 2

What metric system would you use would you used for the following objects:

Mass of a lipstck:
Mass of a pingpon ball:
The mass of a person:

2006-11-14 07:31:51 · 3 answers · asked by conew508 1

In a lab where we boiled a flask of water, pluged it, tipped it over then set a bag of ice on the bottom(now the top), why does the water boil?
Please include as much detail as possible.

Thank you

2006-11-14 07:25:33 · 2 answers · asked by Truthitude 1

2006-11-14 07:07:25 · 8 answers · asked by heartiagram 2

Is it possible to make an gun where the projectile is moved using elctromagnets. if sucessful can replace the use of explosive material in the ammunition.

2006-11-14 07:06:07 · 5 answers · asked by BABU K 2

is the shape of the charged particle different? How does a proton (for example) differ in looks etc from a positron ? A particle with mass curves the space-time continuum around it. What does a charged particle curve and/ or bend the space-time continuum around it?

2006-11-14 06:36:48 · 1 answers · asked by homeworknetguru 1

2006-11-14 06:25:50 · 5 answers · asked by hanna k 1

2006-11-14 06:06:36 · 12 answers · asked by Anonymous

When reaching it's starting point after exactly 1 hour, what would the circle's radius be if measured in metres.

2006-11-14 05:56:38 · 5 answers · asked by samanthavanheerden 1

2006-11-14 05:37:31 · 4 answers · asked by Anonymous

A sample of nitrogen gas was collected over water at 20.°C and a total pressure of 1.50 atm. A total volume of 2.20 102 mL was collected. What mass of nitrogen was collected? (At 20.°C the vapor pressure of water is 17.5 torr.)
i got 0.003766grams
why i am wrong

2006-11-14 05:27:46 · 1 answers · asked by smile 1

how do I make a cold fusion rector, my electric is getting way too expensive, I could keep it in my shed right?

2006-11-14 05:25:10 · 7 answers · asked by SCOTT B 4

Imagine that there is something in space "x" amount of distance from the sun. At what speed or acceleration would the object travel towards the sun due to its gravity. Like wise, if the same object was the same distance from Mercury at what speed or acceleration would it travel towards Mercury due to its gravity. need this for all the planets and the sun.

I am making an interactive model of the solar system and I need to know the gravity values of all the planets and the sun.

If it is easier, I would love to know the actual gravity values of all the planets and the sun.

2006-11-14 05:20:36 · 3 answers · asked by dragon_maker123 2

2006-11-14 05:14:43 · 3 answers · asked by Mark L 1

2006-11-14 05:14:04 · 2 answers · asked by Mark L 1

2006-11-14 05:12:49 · 1 answers · asked by Mark L 1

2006-11-14 05:11:38 · 11 answers · asked by Nefandus 2

2006-11-14 05:08:19 · 3 answers · asked by goring 6

F = ma; Is acceleration possible without any motion?

2006-11-14 04:53:38 · 6 answers · asked by Anonymous

I mean, if our universe is expanding, is there another universe that is contracting because ours is expanding?

2006-11-14 04:46:58 · 6 answers · asked by rajurenjitgrover 1

2006-11-14 04:43:04 · 3 answers · asked by goring 6

I just cannot believe that we will ever be able to explain EVERYTHING with one simple equasion. Take human emotions. No single equasion will ever be able to explain the feeling of "love."

2006-11-14 04:40:40 · 5 answers · asked by BOO! 2