Physics - November 2006

2006-11-13 05:45:28 · 2 answers · asked by Brittany K 1

Have to answer a question on whether a piston in a car engine on a short connecting rod to the crankshaft, executing circular motion, is executing simple harmonic motion or not. What is a crankshaft and is it executing SHM?

Thanks for all your help xXx

2006-11-13 05:39:54 · 6 answers · asked by Star dust 4

2006-11-13 05:15:58 · 6 answers · asked by R L 1

2006-11-13 05:10:01 · 3 answers · asked by Joe the poe 1

i need to calculate the time it takes for a telephone signal to be transmitted to a satellite and then from a satellite to the receiver telephone. i have all the information except for this little part- the speed of telephone signals in an electric wire. cud u help me?

2006-11-13 04:50:15 · 6 answers · asked by amandac 3

2006-11-13 04:50:03 · 2 answers · asked by shaunhaigh2004 1

If we didn't have rods and cones in our eyes, we wouldn't be able to see color. How does the camera compensate for this?

2006-11-13 04:37:40 · 6 answers · asked by Joey L 1

i need answers for physical science.

2006-11-13 04:29:16 · 1 answers · asked by kcbear120 1

Supposed that a 1000 kg car is traveling at 25 m/s Its brakes can apply a force of 5000n what is the minimum distance required for the car to stop?

2006-11-13 04:16:39 · 4 answers · asked by Anonymous

2006-11-13 04:11:25 · 7 answers · asked by smile 3

it is currently impossible to achieve manned supersonic or even sub sonic travel under water due to the mass of water right? And the pressures that depth can create,it limits how fast we can go... we could currently go faster with the subs we have by adding horse power.even if we could get enough power into a submersible to go supersonic it would just rip apart like hitting a brick wall. Do any of you think that by basically creating a submersible that looked similar in desighn to an aircraft, with the same wing lift and drag ratios. That by useing air or a lighter element to create and keep a virtual air buble around the ship that it would correct and illiminate the heavy mass problem.Thin making it PROBABLE to achieve MACH + speeds???? INPUT PLEASE thanks

2006-11-13 03:59:43 · 8 answers · asked by anthony conant 2

In 9.5 s a fisherman winds 2.5 m of fishing line onto a reel whose radius is 3.0 cm (assumed to be constant as an approximation). The line is being reeled in at a constant speed. Determine the angular speed of the reel.

2006-11-13 03:41:03 · 4 answers · asked by Alan l 1

After 10.0 s, a spinning roulette wheel at a casino has slowed down to an angular velocity of +1.72 rad/s. During this time, the wheel has an angular acceleration of -4.05 rad/s2. Determine the angular displacement of the wheel.

2006-11-13 03:39:50 · 5 answers · asked by Alan l 1

The shaft of a pump starts from rest and has an angular acceleration of 2.00 rad/s2 for 15.0 s.

(a) At the end of this interval, what is the shaft's angular speed?

(b) What is the angle through which the shaft has turned?

2006-11-13 03:39:29 · 2 answers · asked by Alan l 1

A projectile (mass = 0.24 kg) is fired at and embeds itself in a target (mass = 2.61 kg). The target (with the projectile in it) flies off after being struck. What percentage of the projectile's incident kinetic energy does the target (with the projectile in it) carry off after being struck?

2006-11-13 03:38:24 · 2 answers · asked by Alan l 1

An 86.0 kg climber is scaling the vertical wall of a mountain. His safety rope is made of nylon that, when stretched, behaves like a spring with a spring constant of 1.20 x 10^3 N/m. He accidentally slips and falls freely for 0.750 m before the rope runs out of slack. How much is the rope streched when it breaks his fall and momentarily brings him to rest?

My Approach:
1/2(86)(3.38 m/s) + (86)(9.8)(0) = 1/2(86)(0) + 1/2(1200)x --- i solved from the middle and the bottom

145.3 = 600x

x = .242 m

I found PE and KE at the middle and PE(elastic) and PE at bottom...the answer is wrong for sure though--it doesn't even come close to the book answer at 1.95m

2006-11-13 03:22:14 · 2 answers · asked by Anonymous

I was thinkig about the digging to China thing, wouldnt you have to come out feet first? BTW - I know it isnt possible, lets talk physics of the improbable.

2006-11-13 03:21:17 · 14 answers · asked by shifty67 3

in construction of homes,to prevent noise polution,cardboards are used as noise preventer. but this is not done in cinema theatres.why is it so?

2006-11-13 03:12:47 · 5 answers · asked by Anonymous

Take a beaker filled with water.pressure at its surface will be equal to atmos. pressure.now insert in it a bent pipe which connects it to another beaker L meter above the first one and having its surface parralel to the first one. it will too have pressure equal to atmos. pressure.but according to formula P = Heg the pressure at upper beaker should be (atmos.P)- (Leg )

2006-11-13 02:57:58 · 3 answers · asked by archit p 1

what are the main factors which caused the bridge to swing violently.

2006-11-13 02:24:05 · 3 answers · asked by me ! 1

how about its structure, nature etc.. etc..of the ice....do these take part on the effect?

2006-11-13 02:18:21 · 8 answers · asked by Anonymous

for me...time is nothing...is not a matter...but how about you? i'll happy if you share your opinion about time to me...whether you agree or not...here is free for you to write...

2006-11-13 02:03:03 · 6 answers · asked by San 2

A simple pendulum is made from a 0.71 m long string and a small ball attached to its free end. The ball is pulled to one side through a small angle and then released from rest. After the ball is released, how much time elapses before it attains its greatest speed?

I found the period, which is 1.69. I figured the fastest speed would come at 1/2 that, which is .84 s. But it's wrong! I can't figure out what to do next!

2006-11-13 01:58:42 · 2 answers · asked by sglass359 1

One mass is 102 kg, one mass is 407 kg, and they are separated horizontally by 0.475 m. Midway between them is an object that is 21.7 kg.

Find the magnitude of the net gravitational force exerted by the larger objects on the 21.7 kg object in units of N. The universal gravitational constant is 6.672 x 10^-11 N m^2/kg^2.

Also, If the distance bettween the 102 kg and the 407 kg masses remains fixed, at what distance from the 407 kg mass (other than infinitely remote ones) does the 21.7 kg mass experience a net force of zero (in units of m).

2006-11-13 01:57:42 · 1 answers · asked by Anonymous

.It is a dark and stormy night. our secret agent, 008 is behind enemy lines at a fuel depot. she walks over to a cylindrical tank, w/c is 20 ft. tall and 8 feet in diameter. the tank is full. our agent opens a 2 inch diameter circular nozzle. she knows that the volume of the fuel leaving the tank is

volume lost(ft3)=velocityx(area of nozzle)xtime <----( i dont know if this is a the formula..? what do you think??)

and that,
__________________
volume(ft/sec)=8.02x #8730;height of the fluid tank

our agent must radio in a report giving the approximate height of the fluid in the tank minute by minute until the tank is empty. she can first calculate the volume lost over one minute and assume taht the loss of fluid is constant. next she can then subtrat the volume from the tank and determine the new height of the fluid inside the tank at the end of the minute. then she can calculate the loss for the next minute. these calculations must be repeated over and over until the tank is dry.

2006-11-13 01:33:40 · 1 answers · asked by Freddie F 1

2006-11-13 00:33:29 · 10 answers · asked by raine01_21 1

2006-11-13 00:23:27 · 22 answers · asked by Kate M 1

2006-11-13 00:09:39 · 3 answers · asked by Mr.Cool 2

2006-11-13 00:04:58 · 1 answers · asked by doom_thursday_666 1

2006-11-12 23:37:19 · 5 answers · asked by nixson 1