Physics - April 2007

2007-04-06 03:14:45 · 3 answers · asked by Tyler Witt 1

i am in my 12th std and very slow in calculations

2007-04-06 02:53:26 · 3 answers · asked by Anonymous

Hi, i'm trying to rearrange the equation
g = GM/r^2 for r,
however i don't have the mass M, i do have a quantity for density, and with
mass = density (p) x volume (4/3 pi r^3),
so i've managed to get the equation
g = G (p x 4/3 pi r^3)/r^2, and i'm slightly confused as to where to go from here. Would the equation end up as
g = G x p x 4/3 x pi x r, and if so, to find r would the equation end up as r = G x p x 4/3 x pi /g ?
Thanks.

2007-04-06 02:52:44 · 4 answers · asked by David M 1

The 1994 Winter Olympics included the aerials competition in skiing. In this event skiers speed down a ramp that slopes sharply upward at the end. The sharp upward slope launches them into the air, where they perform acrobatic maneuvers. In the women's competition, the end of a typical launch ramp is directed 58° above the horizontal. With this launch angle, a skier attains a height of 14 m above the end of the ramp. What is the skier's launch speed?

2007-04-06 01:31:04 · 2 answers · asked by Anonymous

2007-04-06 01:02:38 · 9 answers · asked by ani 1

If i put a plate in the sun, in the atmosphear the electrons will scatter right?

If it does scatter what is the avrege range, maximum range and minimum range of the electrons?
Also can u please notify the loss of KE of electrons in air

2007-04-06 00:15:16 · 2 answers · asked by Anonymous

According to Newton, gravity is an instantaneous force acting on an object. As such if the sun was to vaporise completely, Earth should move out of her orbit immediately. However Einstein has work out that nothing can surpass the speed of light. Since light takes approximately 8 mins to travel from the sun to the earth, how can it be possible that Earth can move out of her orbit immediately the sun vaporise? Is Newton concept of gravity questionable?

2007-04-06 00:01:45 · 16 answers · asked by ninjatortise 2

2007-04-05 23:51:04 · 8 answers · asked by parthi 1

a particle of charge 1 coulomb is at rest. a body of mass 200 mg and charge 1 coulomb is approaching this particle with velocity 1.5*10^5 m/s. then this body will---
a. stick to charge
b.carry the charge with
c.cross the charge
d.stop at a distance of 4m from the charge

2007-04-05 21:43:36 · 3 answers · asked by godisgreat 1

Can anyone date and briefly describe the first low frequency audio filter. It was effective below 500 Hz with limited enhancment of higher audio frequencies.

2007-04-05 21:19:27 · 2 answers · asked by Caretaker 7

The core of the Earth is very hot, sufficient to convert seawater into superheated steam. Does it blow out at both ends, preventing seawater from flowing into the hole, or does it blow out only one way, creating a nonstop geyser on the dry land side, thereby providing a source of geothermal energy? Is this analyzable as a physics problem?

2007-04-05 21:06:12 · 5 answers · asked by Scythian1950 7

a semicircular wire has length L and mass M. a particle of mass m is placed at the crntre of the circle. find the gravitational force of attractionon the particle.

2007-04-05 20:30:34 · 4 answers · asked by Anonymous

Can 24th century technology create artificial gravity by heating closed containers of gas so that relativistic molecular velocities are attained, thereby creating enormous relativistic mass? If this is fundamentally not possible, give your reasons why.

2007-04-05 18:22:29 · 7 answers · asked by Scythian1950 7

A spring is hung from the ceiling. A 0.482-kg block is then attached to the free end of the spring. When released from rest, the block drops 0.222 m before momentarily coming to rest.
a) What is the spring constant of the spring?
b) Find the angular frequency of the block's vibrations

2007-04-05 18:09:18 · 2 answers · asked by Anonymous

for example a ferris wheel a clocks hands a child on a swing

2007-04-05 16:45:56 · 3 answers · asked by Anonymous

I need 6 credits to keep my teaching certification valid and also need 6 credits to add physics to my chemistry certification. I am looking for a class or two not in the standard 3 course sequence because I already took those as an undergraduate. I've seen them on 'how objects work' or maybe modern physics (quantum/ cosmology?). Plus I need the courses to be on-line. The ones I come up with on google seem to be from a few years ago. Preferrably not too expensive. Am I asking too much?

2007-04-05 15:52:33 · 1 answers · asked by Cindy B 5

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2007-04-05 15:49:25 · 2 answers · asked by spiffy_mcbang13 1

This question is about absorbing of heat or you can say albedo.

I have this two shirts.
One is BLACK and the other one is WHITE.
i put same amount of light on both shirts to heat them up.
it seems that black shirt is hot.
I can find the temperature using the thermometer..
but guys can you find a sophisticated way to find temeperature without using the thermometer.

2007-04-05 15:31:27 · 3 answers · asked by Anonymous

Free energy as in the ether or vacuum energy. Nicola Tesla's free energy. Magnets have energy, lightning, static shock. These are forms of energy that exist in abundance. Obviously the device to collect this energy may indeed cost something, but then provide more energy than we could ever need. The impact this technology would be for the greater good of all on this planet. When we have this energy source there would be no more fossil fuels to buy. How much money do you think you would save every month when this is possible? No light bills, no gas for your car, you could grow your own food faster than you could eat it, everything would cost less if no one had to pay electricity for their company's or their company vehicles. So on and so on. These are just a few examples. If you don't believe......why not?

2007-04-05 15:07:03 · 13 answers · asked by God!Man aka:Jason b 3

at QED Feynman's book he claims that anti-particles can be seen as matter traveling backward in time.
Can anyone help me picture this? Can it be a simple movement and the time-dimension be "felt" as normal?

there is a similar post with the question "Anyone of you ever hear a theory that anti-particles are merely ordinary matter traveling backward in time?" but there isn´t really an answer there

2007-04-05 14:55:38 · 8 answers · asked by elcabong 2

the man is showing doing pushups. His weight is 615N. The length from his feet to his center is .827m and from the center to to his hand is .363m. What I need to find out is how to calculate the normal force exerted by the floor on each hand, assuming that the person holds the position

2007-04-05 12:50:50 · 4 answers · asked by bhjesusfreak101 2

must be built from scratch, no kits, can only be powered by mousetrap spring, no engines or things like that

2007-04-05 12:35:36 · 4 answers · asked by Anonymous

if R1 is 518.95 cm and R2 is 1200 cm, what is the force F is required to lift a mass of 60 kg at constant speed?

2007-04-05 12:33:17 · 3 answers · asked by judykharrison 1

a rubber ball whose mass is 3.5 kg is moving with a velocity of 34.4 at 210 degrees meters per second. it collides with and embeds itself in a 2.4 kg block of clay that is moving with a velocity of 12 at 130 meters per second. what is the velocity of the combined mass just after the impact?

2007-04-05 12:26:09 · 2 answers · asked by mandy 1

2007-04-05 12:08:36 · 1 answers · asked by lord_andys_new_id 1

But how does physics explain that something much more massive than an electron, like a proton, has an equal in magnitude charge as the electron?

2007-04-05 10:12:28 · 8 answers · asked by Anonymous

A good camera lens contains optical components in which two pieces of glass are glued directly together to form a single transparent object. These two-element optical components are important because they?????

2007-04-05 10:04:45 · 2 answers · asked by Anonymous

i need some science project ideas on solar energy and if possible some hypothesis on the topic solar energy
Thanks

2007-04-05 10:02:17 · 5 answers · asked by TiTi 1

2007-04-05 09:39:54 · 12 answers · asked by Voight-Kampff 3

can you graph the change in volume from 0 degrees Celsius to 100 degrees celsius?

2007-04-05 09:23:53 · 4 answers · asked by spamboy 1