Pulse Definition and 323 Threads

One of the funniest oneliners I've seen in a technical paper: " It is therefore impossible to have a Laser deliver more than about a GigaJoule of coherent light. The implied limitations to military systems, such as those inspired by SDI, are so tragic they shouldn’t even be contemplated. "...

In another thread I murmured something about asymmetric climate problems at the end of the last ice age. Here, I’ll show three studies that form a big conflict together around a sudden sea level rise that is known as “Melt Water Pulse 1A”. Curiously enough one person, Prof Clark of the Oregon...

The electron densities, ne, at any height h < 300 km on the lower side of an F2 layer can be described by a scale height relationship: n_{e}(h) = n_{e}(300) \exp\left(\frac{0.75(h-300)}{H_{O}}\right) where HO is the neutral atomic oxygen scale height. If the ionosphere has an isothermal...

I have tried this problem many times using different equations and none of them have worked how do I solve this? A cord of mass 0.51 kg is stretched between two supports 26 m apart. If the tension in the cord is 148 N, how long will it take a pulse to travel from one support to the other?

Doppler Radar?? Please can someone help me with doppler radar...need to know bandwidth?? Is it usually continuous wave or pulse?? or can it be both?? pretty much just after some general knowledge on doppler radar? thanks in advance!

Hi, a. A free-running, flashlamp-pumped Nd:YAG laser produced pulses having a duration of 500 microseconds at a repetition frequency of l00Hz. Deduce the pulse power in this type of operation if the average power of the laser is 5W. (100W) b. This laser is then Q-switched and the average...

What does it mean by laser pulse 10 nanosecond?

Hi, I am coming into my senior design project and I have a question. Originally, my group was going to design a new cylinder head design without using poppet valves. Being that we only have 15 weeks, we figure we don't have nearly enough time. Wanting to keep an automotive related project, I...

I'm trying to design a simple circuit that will enable a magnet passing by an induction coil to send an IR pulse to a simple receiver plugged into a Linux box. This will be used to measure the speed of a turning wheel without having to worry about batteries or a power block of any sort. Any...

I have problem figuring out the reflection of a pulse on a rope with a fixed point. Do you know some websites to find animations about it?

Hi, I am wondering if anyone here has a way to calculate the surface temperature of an object as it gets hit by a radiation (laser) pulse of known power and duration, (and wavelength...). Thanks.

We currenlty have a circuit that takes a pulse from a 555 chip and goes through two divide by ten 7490 switchs to create a binary counter that counts up to ten. We are trying to figure out how to convert this binary which we have displayed in regular leds into a 7 segment LED - (LN514rk) any...

Hey dearest people Who can help me solve the following problem? A wave pulse is described by, y = 0.04exp(-0.6(68x - 7600t)2) [m]. Here t is measured in seconds, x and y are measured in meters. a) What is the velocity of this wave pulse? Be careful to get the sign of the velocity...

Can anyone help me attempt such a project? I basically need to be able to sense the injection pulse in the injector pipe (1/4 inch / 6mm dia.) and convert it to an electrical pulse so that a normal ignition timing light (strobe light) can read the input as it would on a petrol/spark ignition...

Voltage pulse from ignition coil ?? Hi, Does anyone know the voltage of the pulse from a typical ignition coil? thanks. tyler

Can anyone tell me where i might find plans for a valve less pulse jet engine, with a thrust of about 80 to 100lbs, i want to use it to power a novel gocart. i want to use gas as the fuel if possible.

I can't figure out how to find the mass of the clothesline, even though given the density, because the radius or crossectional area is not given. Any input on this would be appreciated. A clothesline of length 10m is stretched between a house and a tree. The clothesline is under a tension of...

A nylon rope of length 80 ft. is under a tension of 3000 lb. The total weight of this rope is 6 lb. If a wave pulse starts at one end of this rope, how long does it take to reach the other end?

Does anyone know how emps work and how to construct one?

what is meant by SINGLE PULSE in the output of Q-sWITCHED laser source?

Hello, I have a question concerning electromagnet coils and static electricity. If one were to generate a static charge and store it up some how (like in a Leyden jar or something), and that charge was then dumped over a small electromagnet, would there be enough energy to provide a small...

why we should use the pulse function in function generator when we need to check the speed of electromagnetic wave in coaxial line ?? why we can't use the other like sawtooth function??

I would like to ask why a radio-wave pulse with defined frequency was used in NMR, why it can excited different proton in sample measured. Is it related to so-called "lifetime boarding" ?? Thx :frown: