Physics - October 2006

an electron accelerates from rest in a uniformelectric field to a speed of 2900000m/s(2.9*10^6m/s) in a distance of 14cm. What is the magnitude of the electric field?

2006-10-24 22:11:39 · 3 answers · asked by maria d 1

Just think, if they had mastered this, they would be many, many years older than we are. Could they be from our future here on earth. Are they or could they be spiritual beings? The little ant creatures with big eyes, what if they are just robots? What do you think about this? This question is part Spirituality and Science. Thanks.

2006-10-24 21:55:08 · 7 answers · asked by shardf 5

2006-10-24 21:44:35 · 11 answers · asked by johnnysmooth 1

2006-10-24 21:40:48 · 15 answers · asked by johnnysmooth 1

2006-10-24 21:30:23 · 136 answers · asked by johnnysmooth 1

A(n) 1406.8kg car is coasting along a level road at 22.9m/s. A constant braking force is applied, such that the car is stopped in a distance of 58.4m.
What is the magnitude of the braking force? Answer in units of N.

2006-10-24 20:43:47 · 2 answers · asked by Anonymous

An elevator starts from rest with a constant upward acceleration and moves 1m in the first 1.5s. A passenger is holding a 9kg bundle at the end of a vertical cord.
The acceleration of gravity is 9.8m/s^2.
What is the tension in the cord as the elevator accelerates? Answer in units of N.

2006-10-24 20:15:48 · 4 answers · asked by Anonymous

3 points question
Physics o-lvel

2006-10-24 19:20:24 · 10 answers · asked by Anonymous

for a school project, i need to boil cold water using a vacuum pump. I did some research, but i still didn't find what i needed. I need to know what kind of pump i need for this, and where i can get one for cheap, since i will only use it for this project. if you know how to actually use it, you can throw that in as well. thanks!

2006-10-24 18:42:20 · 8 answers · asked by HoldYourColor 3

2006-10-24 18:05:06 · 8 answers · asked by Random is my passion 4

I remember in physics my teacher said that running and walking ended up burning the same calories according to the formula intensity = rate * time....like if you run 6 miles and it takes 20 minutes that eqals an intensity of 120.... which is the same as if you walk 4 miles and it takes 30 minutes since that equals to be an intensity of 120? I mean it seems common sense that its harder to run than walk, but then again this formula makes sense too...

2006-10-24 17:55:07 · 8 answers · asked by Sarah 4

I need to know for a science experiment.

2006-10-24 17:54:47 · 4 answers · asked by lilcrazydazy 1

A boat begins on the east side of a river and heads straight WEST acress the river with a speed of 3.7m/s(realtive to the water). The river flows SOUTH at a speed of 1.8m/s(realtive to the shore). The resultant velocity of the boat (realtive to the shore) is approxmately__m/s at __degrees (CCW from east).

A. 1.90 B. 4.11 C. 5.50 D. 203.6 E. 205.9 F. 209.1
G. 222.0 H.227.7 I. 228.0 J. 240.9 K. 244.1 L. 246.3
M. None of these are even close to the correct magnitude.
N. None of these are even close to the correct direction.

2006-10-24 17:36:03 · 3 answers · asked by "G" 1

Given the formula: wave velocity= wavelength/period
Please determine the velocity of this wave in FEET PER SECOND and MILES PER HOUR. Assume the wavelength is 30 feet and the period is 10 seconds. Remember 1 mile= 5280 feet.

I need to know how to do this. I am confused. Thanks!!!

2006-10-24 17:23:44 · 4 answers · asked by Anonymous

If a physical body gains more mass as it reaches the speed of light, where does that extra mass come from?

2006-10-24 17:10:19 · 12 answers · asked by Kren777 3

The force of gravity on a 2 kg rock is twice as great as that on a 1 kg rock. Why then doesn’t the heavier rock fall faster?

2006-10-24 16:57:21 · 11 answers · asked by Anonymous

a box of mass 2.00kg is on a smooth frictionless ramp which makes an angle of 30.0 degree with the horizontal. A force P = 15.0N which makes an angle of 25.0 degree with the vertical is applied to the box. calculate the normal force component that the ramp exerts on the box.

2006-10-24 16:57:09 · 2 answers · asked by Galaxy D 2

A red air track glider of mass 228 g moving with initial velocity +5.60 cm/s collides elastically with a blue air track glider of the same mass moving with an initial velocity of -37.90 cm/s. What will the red glider's velocity be, in cm/s, after the collision? Please give your answer to TWO DECIMAL PLACES. Don't forget the +/- sign! HINT: Do all of the algebra first, before you do any calculations with numbers. If you calculate with the numbers first, you are likely to get an answer that is not quite correct.

2006-10-24 16:55:42 · 3 answers · asked by Anonymous

A golf ball is hit from the ground with an initial velocity at 30.0 degree above the horizontal at t = 0.00s. At t =1.50s, it has a speed of 22.0m/s. calculate initial speed of the ball.

2006-10-24 16:53:36 · 2 answers · asked by Galaxy D 2

2006-10-24 16:35:44 · 3 answers · asked by Ray S 1

This question is for someone with the knowledge and the ability to express the answer simply. I've always seen the insinuation that the two branches are not compatible with each other...never quite understood WHY though, seeing as BOTH seem to work pretty well.
Could it be that the answer of "everything" might be found in BIOLOGY?...seeing as neither branch delves into the appearance of life in the universe and how it relates to physics.

2006-10-24 16:25:54 · 5 answers · asked by Anonymous

If a vehicle with a mass of 1200 kg has a speed of 120 km/h, what is the vehicle's kinetic energy as determined by someone at rest alongside the vehicle's road?

2006-10-24 16:15:04 · 5 answers · asked by Anonymous

A disk with a radial line painted on it is mounted on an axle perpendicular to it and running through its center. It is initially at rest, with the line at (theta0) = -90°. The disk then undergoes constant angular acceleration. After accelerating for 3.1 s, the reference line has been moved part way around the circle (in a counterclockwise direction) to (thetaF) = 130°.

Given this information, what is the angular speed of the disk after it has traveled one complete revolution (when it returns to its original position at -90°)?

2006-10-24 16:06:16 · 1 answers · asked by Anonymous

If a cylinder of 100 kg has a radius of 2 m has a smaller cylinder cut out with a radius of 1 m, what is its mass? How would I find this?

2006-10-24 15:58:23 · 2 answers · asked by Anonymous

Find the coefficient of kinetic friction between the tires and the road

2006-10-24 15:55:22 · 2 answers · asked by Dan L 1

2006-10-24 15:42:26 · 6 answers · asked by Dave R 1

can you take an actual picture, not just a computer drawing. Like a teloscopic picture of of an actual atom?

2006-10-24 15:35:22 · 9 answers · asked by some guy 1

a small sports car is also driving at 60mph, with the wind applying a pressure of 50N/m<2. the front of the sports car has a surface area of 2.5m<2.

2006-10-24 15:25:03 · 2 answers · asked by foxy lady 2

If tension can be expressed as force (F=ma), is it possible to yield a negative tension value under the law of physics? Example, you have a negative acceleration multiplied with a mass that gives you a negative number.

2006-10-24 15:19:19 · 4 answers · asked by andrew c 1

A box of books weighing 319 N is shoved across the floor by a force of 48s N exerted downward at an angle of 35 degrees belown the horizontal.
a) ifthe coefficient of kinetic friction between teh box and the floor is 0.57, how long does it take to move the box 4 m, starting from rest
b) if coefficient of kinetic friction between the box and the floor is 0.75, how long does it take to move the box 4 m, starting from rest?

A 3 kg block starts from rest a the top of a 30 degree incline and accelerates uniformly down the incline, moving 2 m in 1.5 s
a) Find the magniutde of the acceleration of the block
b) find th coefficient of kinetic frction between the block and the incline.
c)Find the magnitude of the frictional force acting on the block
d) find the speed of the block after it ha slid a distance of 2 m

2006-10-24 15:15:43 · 1 answers · asked by nmrufus 1