Physics - March 2007

If someone or something was sitting in front of (not below, behind or beside) an object approaching them at speeds higher than the speed of sound, would the sound they hear be reversed and slowed down? Would the sound they hear begin when the object passes them and continue in slowed-reverse until it fades out?

2007-03-03 18:47:48 · 3 answers · asked by Foodeefunk 2

I am not a religious nut but I think it unwise to write of the idea that there is something beyond us.

2007-03-03 17:51:40 · 7 answers · asked by melbournewooferblue 4

in a physics experiment i measured voltage using a digital voltmeter and current using an ammeter for a light bulb, which has a non-ohmic behavior. Why does the needle of the ammeter overshoot for about a second before stabilizing?

2007-03-03 17:42:16 · 3 answers · asked by KrazySweetie 4

In a physics experiment i measured voltage using a digital voltmeter and current using an ammeter so that i could calculate a resistor's resistance and i would like to know what is the major source of error, either voltage or current. your help would highly be appreciated!!!!

2007-03-03 17:37:48 · 3 answers · asked by KrazySweetie 4

ILLUSTRATE BY USING A RAY DIAGRAM

LAW of refraction

2007-03-03 17:26:45 · 1 answers · asked by jppd12689 3

y=6cos(5t-0.009x+0.4) find the distance between two consecutive crest.find the phase difference at two points separated by a distance of (a) 0.2m (b)

2007-03-03 16:47:01 · 2 answers · asked by veena n 1

a man is taking a 100 m race. would it be a good idea to ask an observer from a spaceship travelling at near light velocity to measure the time interval? (since time dilates)

2007-03-03 16:35:19 · 6 answers · asked by prs1145 1

2007-03-03 16:33:29 · 11 answers · asked by jimmy_0ng 1

where can i find reliable and free online journal on sagnac interferometer...

2007-03-03 16:33:07 · 1 answers · asked by jy 1

Why should the coating of ice be removed from the cooling unit of a refrigerator at frequent intervals?

2007-03-03 16:23:34 · 2 answers · asked by auv529 1

Explain why the liner of a thermos bottle silvered,and why does it have a vacuum between its two walls.

2007-03-03 16:21:51 · 3 answers · asked by auv529 1

A person cannot long remain in a swimming pool if the temperature is greater than 37 degrees celcius.Apply your explanation to the thermal pollution on fish in a lake.

2007-03-03 16:20:00 · 2 answers · asked by auv529 1

The category is Hydromagnetic Magnetoidal Dimensions. When travelling at a subsonic speed during the last one hour of hypersleep, which vector of the Romulan Nebula will suffer the wrath of the impenetrable quickening? And for extra points, how many wraths to the nearest moulton?

2007-03-03 16:02:02 · 1 answers · asked by dragongml 3

The category is Hydromagnetic Magnetoidal Dimensions. When travelling at a subsonic speed during the last one hour of hypersleep, which vector of the Romulan Nebula will suffer the wrath of the impenetrable quickening? And for extra points, how many wraths to the nearest moulton? Be specific, this is a real question.

2007-03-03 16:01:45 · 1 answers · asked by dragongml 3

There a lot of movies made on this subject but none of the science that exist today can even touch the surface. Maybe when teleportation is invented we could some day teleport to better worlds/exoplanets out there.

2007-03-03 15:55:29 · 5 answers · asked by Farady 1

There are several movies made about time travel .Is this still science fiction or is there a fesability to construct such a machine ?

2007-03-03 15:34:14 · 9 answers · asked by ROBERT P 7

2007-03-03 15:23:26 · 8 answers · asked by Golden Toilet Chairman 2

For a project : 'Will the aesthetic appearance of your rocket help with the flight distance? Explain your answer in detail'

(we are making a small model rocket)

2007-03-03 15:22:23 · 4 answers · asked by sapphire 2

A battery with an emf (a source of electromotive force) of 12.0V shows a terminal voltage of 11.8V when operating in a circuit with two lightbulbs rated at 3.0W(at 12.0V) which are connected in parallel. What is the battery's internal resistance?


Thanks!

2007-03-03 15:21:13 · 4 answers · asked by Billie 1

If you slosh water in a bathtub at the correct frequency, the water rises first at one end and then at the other. Suppose you can make a standing wave in a 150 cm long tub with a frequency of 0.30 Hz. What is the velocity of the water wave?

Please help me with this problem
I don't understand it.

2007-03-03 15:18:56 · 1 answers · asked by swimmertommy 1

Each of the coil springs of a car has a spring constant of 25,000 N/m. How much is each spring compressed if it supports one-fourth of the car's 12,000-N weight?

I recently asked this question, but nobody answered me.
I don't understand this question.
Please help me.

2007-03-03 15:16:11 · 4 answers · asked by swimmertommy 1

A fly travels at 5 mph in an Easterly direction and is in collision with a locomotive traveling at 80 mph in a Westerly direction. Presumably, the fly must decelerate (E-W) to zero speed in an Easterly direction and then accelerate (W-E) to say, 80 mph in a Westerly direction. (Give or take!).

If the hapless fly, therefore, continues through a state of being-at-zero mph (stationary) during this process …

DOES THE LOCOMOTIVE ALSO, NECESSARILY EXPERIENCE THIS (stationery) STATE - at this time?

[Note: this is really as philosophical question to which I should genuinely read answers. But, FOR THE SMART-ARSES of this world, who would love to postulate things like 'air cushions' and rotary courses on behalf of the poor fly: PLEASE ASSUME THE EXPERIMENT IS CONDUCTED WITHIN A VACUUM!!]

2007-03-03 15:16:02 · 9 answers · asked by Girly Brains 6

2007-03-03 14:50:49 · 12 answers · asked by Anonymous

What made Newton decide to investigate gravity?

2007-03-03 14:46:13 · 11 answers · asked by Airbear 1

A woman of mass 55kg jumps off the bow of a 75kg canoe that is initially at rest. If her verlocity is 2.5m/s to the right, what is the velocity of the canoe after she jumps?

2007-03-03 14:45:22 · 4 answers · asked by cute b 1

1. A 40-kg. crate is at rest on a level surface. If the coefficient of static friction between the crate and the surface is 0.69, what horizontal force is required to get the crate moving?

2007-03-03 14:40:59 · 3 answers · asked by cj440288 1

If for example a light source has a 10cm wavelength and the same source changes to 100 nm. How does this effect defraction and interference. I believe that the lower the wave length, the lower the defraction…yes

2007-03-03 14:39:29 · 2 answers · asked by Anonymous

I have read places that If you travel the speed of light, space time would virtually stop. Is this true? What do quantum mechanics say about this?

2007-03-03 14:33:51 · 10 answers · asked by fatcat988 2

2007-03-03 14:17:10 · 3 answers · asked by a fellow human 2

A mass m1 on a horizontal table is attached by a thin string that passes over a frictionless & massless pulley to 2.5 Kg mass m2 that hangs over the side of the table 1.5 Meter above the ground.The system is released from rest at t=0 & the 2.5 Kg mass m2 strikes the ground at t=0.82 Sec.
The system is now placed in its initial position & a 1.2 Kg mass is placed on top of the block of mass m1.
Released from rest , the 2.5 Kg mass now strikes the ground
1.3 Sec. later, Determine the mass m1 & the coefficient of kinetic friction m1 & the table.

2007-03-03 14:16:57 · 1 answers · asked by cute b 1