Drop Definition and 835 Threads

Hello, I have abnormal situation on a site, there are installed 3 valves in parallel (cascade) in Fuel gas skid, upstream pressure of the valve is 30 bar, downstream pressure 25-26 bar, when 2 GTG starts up to load 40 MWt (100 %) the downstream pressure of the control valves decreses to 21 bar...

How I am currently imagining it: In a simple circuit with just a battery and resistor the voltage of the battery sets the electrons off through the circuit at some speed and that speed is proportional to the voltage. The electrons then encounter the resistor. From these forums my...

I have a question about calculating the pressure drop in a large flow meter across an array of nozzles. Basically its inside of a tunnel... air flows in this tunnel until it reaches a "gate" which is blocked off except for six nozzles of different size, which discharge back into an open...

If specs on a 300Hp electric motor; 480 Volts 3 Phase 60Hz The full load Amps of the motor is 361A, which I found in the NEC table. My distance is 700ft to a control center and I can't seem to figure out what copper conductor size to use. In order to find the Voltage drop I have to know...

Homework Statement Voltmeter has a internal resistance of 10M ohms and the resistor has a resistance of 100,000ohm. The current through the resistor is 1mA. a)What is the voltage drop across the voltmeter? b)What is the current through the voltmeter? Homework Equations V=IR is all you...

Homework Statement Find the voltage drop across a resistor and capacitor in parallel. I am trying to understand how to deal with this using complex numbers. I may have a completely wrong notion of complex impedance. I thought I could treat the complex impedance like resistance, then take the...

Hello, I have the following system (see enclosed figure): A viscous (non Newtonian) fluid at high temperature is going trough a tube at a known mass flow, at the exit there is an inclined plane at a given angle (b). I would like to estimate in some way how the inclined plane at the exit...

Homework Statement So I have a problem that I am working on that requires me to find the voltage drop across a 1000 mA current source, and two 2000Ω resistors that are in parallel. I've added a picture of a circuit diagram for this below. Homework Equations V = I * R The Attempt at a...

Homework Statement A raindrop is falling through a cloud, collecting water as it falls. If the raindrop has mass m and velocity v, show that mg = vdm/dt +mdv/dt. Assume that the drop remains spherical and that the rate of accretion is proportional to the cross-sectional area of the drop...

Hey everyone, I could do with a hand checking my understanding of calculating the current loss in cables just to make sure I am doing it right. First up, is power loss. From my understanding of ohms law and P=VI it is possible to calculate the power loss in cables by using the formula power...

Relevant equations: V = I*R ε = I*(R+r) Then, V = {ε/(R+r)}*r V = potential difference, ε = electromotive force, R = resistance of external load resistor, r = internal resistance of the battery. So say the external load resistor's resistance is a constant for two batteries of the...

I'm currently studying electric circuits and can't find the answer to my question anywhere so far. I realize current is the flow of positive charge even though positive charges stay put in reality and that this is an old historic concept that is still around today because Benjamin Franklin...

[Mentor's note: these posts were split off from jduster's "best/worst US presidents" thread to keep that thread from being derailed completely from its original topic.]How could anyone praise Truman the destroyer of Hiroshima and Nagaski to impress the Soviets with American Might.

Homework Statement Explain why the temperature gradually drops as the solution is in the process of freezing? Homework Equations None The Attempt at a Solution No idea how to start!

In a simple zener shunt circuit consisting of a zener diode in parallel to the input voltage and load how does the regulator compensate for a drop in input voltage? In other words the zener will conduct or 'shunt' when the source voltage exceeds the breakdown voltage of the zener diode. How...

I want to work out the dynamics of a compressed air system consisting of a filter/regulator unit some spool valves and a rotary actuator with all the associated fittings. Essentially I have a 2" nominal bore compressed air line at roughly 7.5 bar, I have a system which feeds off this air main...

I am really struggling with my Calculus 1 class. I have a book and everything for it I do all the problems from the book including the homework that the teacher provides us. I find the homeworks very hard and I have no clue how to solve some of them. The thing is when I took a placement test I...

Hello, I am a computer engineer that specialized more in software but I am trying to remember the electronics part. In the book I read there is an exercise where a diode (forward-biased) is connected in parallel with a resistor and then both of them are connected in series with another...

Hi, we are doing an egg drop contest in my Physics class and I was hoping to get some ideas for the best capsule possible. Here are the rules: - No pre constructed containers (cans, boxes, bottles, glass, uncut plastic bags, egg containers etc) -capsule dimensions must not exceed 6 inches in...

Impulse Momentum Theorem + Egg Drop?? I have to explain how the impulse momentum theorem relates to my egg drop. My egg was padded with a styrofoam cup and tissues and a plastic bag parachute. Honestly, I don't understand the impulse momentum theorem and I am in need of help! I have fall times...

Voltage Drop Between Sender & Receiver ...( help needed ASAP , Thanks in advance ) hello every body I'm EE student and I'm new member here ... in a deep need for your help & knowledge I'm doing some reading about the power transmitted from the sender to the receiver end , As we all know...

Assuming strings are real, how many would fit in a drop of water? Perhaps this is a basic math question, or that the question itself does not make sense given the hypothetical and (currently) unobservable nature of strings. According to...

Say the voltage drop of a diode is .7 volts. Once the voltage drop has been reached, and it begins conducting electricity, can the voltage be backed off to around .3 volts and it will continue to conduct electricity? Or does the amount of electricity need to be a constant .7+ volts?

Dear Forum: I am a senior chemistry major that has the typical science/engineering background in math - 2 quarters of single variable calculus, 2 quarters of multivariable calculus and vector analysis, 1 quarter of linear algebra and 1 quarter of differential equations. I am currently...

[b]1. Wondering if there are any different equations out there for free fall drop. [b]2. The only one I received was H=1/2gt^2 [b]3. I don't know if there are any others, someone said ΔX=ViTf+1/2aTf^2, but I don't think that's for free fall?

Hi I am wondering would ye be able to help me out? I am instructed with the task of calculating the pressure drop and flow coefficient for a valve. Please see basic diagram attached for layout of valve. I need to find the pressure drop and flow coefficient when the ram is closed at different...

Homework Statement i need to make sample calculations of momentum using the mass of a standard egg (.05kg) dropped from 1 2 and 3 meter heights. but i have no clue how to do this

Hi. I'm currently a first-year Master's student in EE. I just wrapped up my first quarter and, in all likelihood, my GPA is going to be below a 3.0. In my school, that means that I'll be put on academic probation for the next quarter. If I don't get a 3.0 or above in the next quarter, I'll be...

Homework Statement The egg protecting device cannot slow down the natural descent of the egg in any form: The mechanism used to protect the egg cannot rely on buoyancy (i.e. no inflated balloon-based solutions) or air resistance (i.e. no parachutes or solutions designed to increase the air...

My class has been assigned the egg drop project, and I need some help/info on how to go about it. Objective: to design a container which will protect a raw egg, when dropped. Apparatus: 1. Each container must meet the following specifications: a. Maximum mass- 20g...

My physics class is doing the popular egg drop experiment. We may only use wooden strips no larger than a 1/4" by 1/4" in cross section (ex: toothpicks, popsicle sticks). We may not use bamboo as it is a grass not a wood. We can only use glue, cement, superglue, or hot glue to hold it...

I have a fixed object of known mass (12kg) being impacted by an air pistion of known force (), I desperatly need to be able to calculate what height an object would have to be dropped to have the same force imparted to it that a specific known piston would. what equations do i use and what...

How did he determine the mass of an oil drop and the charge of the electron?

Homework Statement You drop a stone from rest into a well that is 7.35 m deep. How long does it take before you hear the splash? d=7.35 m v=343 m/s (because the disturbance is air molecules and the medium is air not water) Homework Equations d=\dfrac{1}{2}gt_{1}^{2} \lambda=4d and v=\lambda...

I have an egg drop project, in which we make a container on the ground that can cushion the fall of the egg. The limits are: 8 cm height max, and 45 x 45 cm box max area and the egg must not break even if it bounces out after hitting the container. It'll be dropped first from a height of 2...

Homework Statement A 1.50x10-14 kg oil drop accelerates downwards at a rate of 1.80 m/s2 when placed between two horizontal plates that are 9.40 cm apart. The potential difference between the two plates is 980 V. Determine the magnitude of the charge on the oil drop. Homework Equations...

I have to design an egg drop experiment for a teaching project. I'll describe the project and how everything works, then the students have about half an hour to create a container to shelter the egg so that it doesn't break from a fall of about 20 feet. The sticking point is the time limit. I...

Hi, I'm prototyping a non electrical refrigeration system and need some help with a calculation. I have a 2 litre bottle. I pump in air until the internal pressure is 5 bar. I allow the heat increase to dissipate back to the ambient 20 C. I release the air. What will the temperature of...

I was taking with my dad and we got on the subject of what would happen if you dropped a spring into the ocean. Well, I said nothing it would sink to the bottom and not compress because pressure is pushing on it equally from all directions. He agreed. Then I said what would happen if you...

Hello Ok, there's been another news in my area that a young woman was drying her hair, while she was in bath. Smart, huh. And the dryer fell out of her hands, and now she's dead. My kids hear those news and they're shocked and all, but I'd like to explain my kids what actually happened...

Hi I working on a 2 cell lipo pack and need to drop the volts from 8.4 to under 6 volts. I have been using diode to do this but now I need to know what amps it will handle and which diodes to use. the setup I have now runs one servo that might pull 0.25 amps but now going to a system that will...

Homework Statement an oil drop carries six electronic charges, has a mass of 1.6 x 10^-12 g, has a mass of 1.6 X10^-12g, and falls with a terminal velocity in air. what magnitude of vertical electric field is required to make the drop move upward with the same speed as it was formerly moving...

Homework Statement Hello! I'm looking at a situation where there is a finite potential Vo for x<0, but zero potential for x>0. For a particle moving from left to right, I'm wondering what coefficients for the solution to the Schrodinger equation are equal to zero, and also how to prove that...

Homework Statement I'm doing Millikan's oil drop experiment in a lab. I've got a set of measurements and all that, but in analysis of the data I can't seem to get values for the charges on individual drops that seem reasonable. I find that each drop is carrying between 10 and 300 elementary...

Homework Statement In my honours lab we are performing the Milikin drop experiment, and we've come into a slight problem, where when calculating the radius of the drops and the charge on the drops, the charge seems to vary with change in E-field. When performing the experiment we first...

Homework Statement An ice cube, weighing 100g, is dropped in 1kg of water at 20 degrees C. Does the ice melt? If not, how much remains? What is the final temperature? The latent heat of fusion of ice at 0C is 6.025 kJ/mol, and the molar heat capacity of water is 75.3 J/K mol Homework...

This is not a homework question. Why is the voltage drop on an inductor opposite the electron flow? "When the current through an inductor is increased, it drops a voltage opposing the direction of electron flow, acting as a power load. In this condition the inductor is said to be charging...

So the voltage drops across closed circuits I get that is P = V^2/R to get the power and then you will use P=I^2/R to get the current running through the circuit and in the case the current flowing through the closed circuit is equal in every resistor and so is the voltage drop. The part that I...

Egg Drop Project Help! I have to make a egg drop from approximately 25 meters. The egg has to be directly covered by: 1 latex glove 3 pieces of newspaper 2 rubber bands 1 piece of string (30cm) 1 zip lock bag 12 inches masking tape 100 tooth picks glue only to connect bits and pieces...

Homework Statement Revered members, Kindly see my attachment. Homework Equations The Attempt at a Solution When the charged oil drop is balanced, electric force = weight of oil drop. Eq = mg Eq = F + U, where F is the viscous force and U is the upthrust force. Since the oil...