Physics - July 2007

2007-07-18 10:58:36 · 7 answers · asked by John R 2

2007-07-18 10:53:52 · 3 answers · asked by robert c 1

Calculate the wavelength of radio waves if their frequency is 5x10^6Hz.
v=fλ
λ=v/f=(3 x 10^8)/(5x10^6)
= 60

So, my answer is 60. Is this correct?
Thanks for your help!!

2007-07-18 10:53:29 · 5 answers · asked by Chikita 1

what is the magnitude of the force?
a) is it static or kinetic friction? why?
b) what is the max acceleration the truck can have before the crate starts slipping?

2007-07-18 08:43:09 · 2 answers · asked by CHRISTINA Y 1

High-speed stroboscopic photographs show that the head of a golf club of mass 200g is traveling at 55.0 m/s just b/f it strikes a 46.0-g golf ball at rest on a tee. After the collison, the club head travels (in the same direction) at 40.0 m/s. Find the speed of the golf ball just after impact.

2007-07-18 08:04:27 · 6 answers · asked by Anonymous

2007-07-18 07:51:37 · 9 answers · asked by TuongNguyen 1

is there a way to counter gravity to enable a object to float free in the earths atmosphere

2007-07-18 07:19:17 · 7 answers · asked by Anonymous

2007-07-18 07:19:12 · 7 answers · asked by JAMES 4

is it possible this allows us to travel into the future don't u think yes ?

2007-07-18 07:13:10 · 14 answers · asked by Anonymous

I need to know if the weight of a pebble would remain constant in air and in water. Thanks!

2007-07-18 06:41:13 · 11 answers · asked by Anonymous

2007-07-18 06:31:17 · 14 answers · asked by Don't Fear the Reaper 3

Seems that earthquake scientist have the information much closer to them ?

2007-07-18 06:14:39 · 4 answers · asked by james h 2

Means how and why it blast ? By what action or reaction a blast take place?

2007-07-18 05:56:59 · 7 answers · asked by fha_chafzeto 2

I want to know about the nuclues, protons, nutrons etc.etc.
Is it just an imagination?
Detail if plz.

2007-07-18 05:53:41 · 9 answers · asked by fha_chafzeto 2

So, let's take a "fair" quarter. We would expect heads and tails to both come up 1/2 the time. Basic math says the chance of getting 10 heads in a row is (1/2)^10. I know this. BUT, are there any theories that say no, if p(A) = 0.5, in a fair system you will NEVER see more than X in a row, pragmatically?

2007-07-18 05:26:17 · 5 answers · asked by CTEEG 1

2007-07-18 04:40:37 · 3 answers · asked by chris h 1

does this mean it can no longer be used? why?

2007-07-18 04:31:28 · 2 answers · asked by cutejhynxsmile_026 1

A uniform plank of length 5.0m and weight 225N rests horizontally on two supports, with 1.1m of the plank hanging over the right support. To what distance (x) can a person who weights 450N walk on the overhanging part of the plank before it just begins to tip?

The answer is .70m.
My friend and I tried to do this one yet we could never come up with the answer. We thought it would be pretty simple but it ended up not being. Any help anyone can give will be seriously appreciated

2007-07-18 04:30:55 · 2 answers · asked by dreamer_babe15 1

was energy conserved? explain.

2007-07-18 04:27:38 · 3 answers · asked by cutejhynxsmile_026 1

A 0.100-kg ball is thrown straight up into the air w/ an initial speed of 15.0 m/s. Find the momentum of the ball (a) at its maximum height and (b) halfway up to its maximum height.

2007-07-18 04:14:16 · 4 answers · asked by Anonymous

This is ahypothetical question? Please enumerate the answer in layman terms

2007-07-18 03:55:52 · 3 answers · asked by J K 1

2007-07-18 03:53:41 · 16 answers · asked by J-x 1

a) its velocity is doubled?
b) its velocity is tripled?
c) its mass were doubled?
d) both its velocity were doubled and its mass were doubled?

2007-07-18 03:24:31 · 4 answers · asked by abyy 1

suppose I got a gas which has a break down voltage of 40000V at 1 inch. Now suppose i have two plates facing each other one is at 25000v other is neutral and they are at 1 inch away. Now suppose the neutral plate gas induced with 20000v (not 25000 because of the distance factor). The gas will reach its break down voltage and charge will leak...right?

Now suppose i increase the distance to 2 inch....and still i have 25000v in one plate. now will the induced charge on the neutral plate will become 10000v?...and also for that distance will the breakdown voltage increase to double...that is 40000v?

2007-07-18 03:04:40 · 1 answers · asked by Anonymous

atoms have electrons(negative) and protons(positive)...and they said that opposite attracts each other. The nucleus of an atom contains protons. The electrons now orbit around the nucleus? why is it like that? why isn't the electron attracted by the nucleus eh it contains the protons?

2007-07-18 02:20:58 · 11 answers · asked by Anonymous

Is the Canada designed CANDu reactor really as safe as they say??

2007-07-18 02:20:43 · 2 answers · asked by PK 2

example 1 : If someone is on a school bus travelling at 60 MPH, and then she gets up and walks forward, her speed is 1 MPH, how do you record the speed of the person?

Is her speed 60 mph, 61 mph or should you list it at both velocities : 60 mph + 1 mph.

My thought on this is that speed is relative. Someone on the bus observes her travelling at 1 mph, but someone off the bus observes her at 61 mph (I'm assuming). To account for this you record the speed at 60 +1 mph so that someone looking at the record sees there are two different velocities.

Second example: Someone is travelling in a car and fires a gun that is perfectly perpendicular to their forward direction.

Not accounting for any wind resistance, will the bullet continue to move in the direction of the car?

My guess is that bullets leaving this moving object would form a diagonal (triangle with direction of car, intended direction of bullet and actual direction of bullet. Thoughts from physics students?

2007-07-18 02:17:55 · 5 answers · asked by loboconqueso 2

Which has low dielectric constant but high break down voltage?

Break down voltage -- Potential at which the dielectric material suddenly becomes a conductor

2007-07-18 02:05:55 · 1 answers · asked by Anonymous

Actually the question is will the charge "leak"

I got 2 plates .5 inch close one having a potential difference of 3 million volts(static). Will air break down at this voltage?

2007-07-18 02:02:54 · 1 answers · asked by Anonymous

i have been wondering if there are a set number of nerves not for square inch but for...like one average person would have the same number of nerves as an incredibly short person or an incredibly tall person. So really if i pinch a person of the same age with different hieghts in the same spot, would it hurt the shorter one more? please if i am completely wrong don't be completly rude, i am only in the eighth grade...any help would be nice...thank you

2007-07-18 01:48:08 · 3 answers · asked by Tom 4