Drop Definition and 835 Threads

Forgive my naivety. I used to know math, but have sort-a fallen off the bicycle some 30 years ago. I hope I don't go all ballistically ignorant. I have a problem trying to calculate muzzle velocity for pellet rifles. Specifically, I assume there is a way to do it without a chronograph and come...

If I drilled a hole all the way through the earth, and then dropped a ball down one end, what do you think the speed versus distance plot would look like? I am interested in the centre point of the Earth primarily - instinct tells me it would overshoot by quite a bit, but how far? assume...

OK well as the title says I have to do an egg drop using only a foot of tape, 3 sheets of computer paper, and 2 straws (they have the bendable end). So is there any suggestion of what will work best? The egg will be dropped from 10cm to begin with, and then the drop height will increase until it...

Homework Statement Water drips from the nozzle of a shower onto the floor 215 cm below. The drops fall at regular (equal) intervals of time, the first drop striking the floor at the instant the fourth drop begins to fall. a) Find the location of the third drop as measured from the nozzle of...

For a science project we have to make an ''egg protector''. It has to have: -parachute and -base to hold egg in (I just joined 30 minutes ago and could not find a forum like this. So sorry if this is a duplicate.) Aaaaaanyways, our group has to drop it from a 5m tall height, the...

http://www.flickr.com/photos/39972563@N04/3674854817" Its for my physics project and i have tried searching everywhere but couldn't find it. It is drop zone of kings dominion and i want to find the weight of the object people are sitting on. Basically the whole circular thing. can...

Hi, I am currently trying to do a project for my final year in engineering.I have not been able to find any software that's helping me in simulating and obtaining results for pressure drop through an orifice plate. i have tried the fluid option in ansys v10 dinn't understand how to use it...

Anyone here in the states going to be watching the ball drop on television tonight? I am.

Hi all, This is my first time making a somewhat complicated circuit, with the help of an online schematic. (http://www.dprg.org/tutorials/2005-11a/index.html ) My goal is to make a New Year's Eve ball-drop, which has a motorized controlled-release lit-up ball (on a separate power...

I have a question about network flow pressure drop. In a piping system with several identical components in parallel, is the pressure drop across the supply and return header equal to the pressure drop across one of the components? Or is it the inverse of the sum of the inverses? To use...

so I'm working on a physics lab report, and I've derived the following formula V=-N∫dB/dt(dot)dA then I used the chain rule to turn it into V=-N∫dx/dt * dB/dx(dot)dA my question is, can I pull the dx/dt out of integral? I was doing the experiment, and measured the voltage drop, and...

I am trying to help a student understand the concept of voltage drop but I'm not sure I fully grasp the concept myself. From Conceptual Physics 9th edition "The total voltage impressed across a series circuit divides among the individual electrical devices in the circuit so that the sum of...

Homework Statement A fluid of relative density 0.86 and viscosity 0.003 pa flows through a pipe of 12cm diameter. The flow rate is measured using an orifice plate with a 6cm diameter orifice, with pressure tapping connected to a differential U-tube manometer using mercury (density = 13600 kg...

Dear all can anyone explain to me the semi-empirical mass formula and liqiud drop model, I really don't understand what is the difference between them and which one came before the other. I really confused

Homework Statement Our lab was to predict the distance a bungee jumper will fall before coming to rest. I already found the spring constant When we have the spring constant we had to find the minimum safe drop height for a bungee jumper before being stopped by the spring. The following...

greetings what is the difference between voltage and voltage drop? in text i read as follows and i could not get When the voltage on the base is very close to 0.6v, the transistor is just at the point where it is turned ON and the voltage on the collector will be say 8v for a 9v supply...

Homework Statement Hi all, i have a question on thin film interference. Lets say there is an oil drop on the surface of water. Light reflected from the oil drop is observed from above. Explain why interference fringes are not seen when the thickness of the oil drop increases...

Homework Statement [PLAIN]http://img87.imageshack.us/img87/9964/impactforceonbike.png A roller is rolling with a constant speed before and after the drop. How do i figure out the impact force exerted on the wheel when it just touch the floor from a height h? Assume, angular velocity...

I don't understand the Vce voltage drop of a BJT. If I try to think of the BJT as 2 diodes - Base emitter diode and base collector diode. Vce is the voltage across the cathode of the base-collector diode and cathode of Base-emitter diode. How can it be 0.2V(when the BJT is saturated). I don't...

Hi everyone, So I'm doing some research on fluorescence and I'm puzzled. I understand that running a current through fluorescent gasses like neon cause the valence electrons to jump up an energy level, and I understand that photons are emitted when they fall back down into their default...

Homework Statement What is the focal length of a drop of water in the form of a sphere with radius 4mm given that the refractive index of water = 4/3 Homework Equations The Attempt at a Solution Here, i think i will need to assume that the light rays are coming from infinity...

Homework Statement The top of the roller coaster is 77.7m above the earth. From this height what speed can be reached when it reaches the bottom of the drop? This problem must be solved using work and energy equations not kinematic equations.. Homework Equations Wg=-(mgyf-mgyi)...

Homework Statement Ram/Ballistic = 6 Foot long 225 lbs Suspended 12 Feet by 2 Cables Homework Equations Drop required to achieve 10 fps Velocity at lowest point? The Attempt at a Solution = 10*10 / 5.36

An egg is hard, but yet delicate food that people have been making contests of, for many years. But i am part of one that i lack the physics to figure out the perfect device here are the simple rules of this contest. Holy Omelets Batman… It’s the Egg Drop Contest! Design a egg protection...

If I drop a box of the side of a building (20m) that is 5kg, what is the G shock that this will experience? F=mg is the force, obviously. Based on basics, I'm coming up with 1G, but that doesn't make sense - the shock is going to be bigger based on the height. Say I determine the energy...

Homework Statement Find the terminal velocity of an oil drop with radius 1x10^-6 m at 20 degress under zero field conditions. How long would it take to fall 5mm (range of microscope graticule)? Homework Equations Terminal velocity; Weight = Drag Weight = mg Assuming Stokes law holds...

Suppose I have finite wire of known resistivity. I know voltage is 0 volts at x=-1 and x=1, and 1 volt at x=0. How do I find voltage at intermediate points?

I'm doing an electromagnetic fields and waves course. The first part of the course was mainly about transmission line's, using the Smith chart and a host of equations that comes with transmission lines...we had a mid semester exam and i got 13/30, which i wasn't happy about but i didn't put in...

Homework Statement Suppose you want to run some apparatus that is 75m from an electric outlet. Each of the wires connecting your apparatus to the 100V source has a resistance per unit length of 0.0055 ohms/m. If your apparatus draws 2.5 Amps, what will be the voltage drop across the connecting...

I'm currently going into my second year of A-levels and my A-levels are Maths, Further Maths, Physics and Chemistry. I didn't take Further Maths from the beginning though so I'm doing the entire A-level in one year on top of A2 Maths. My predicted grades are: Maths: A* Further Maths: A...

When a golf ball goes round the hole and doesn't drop (bit like an orbit), it often appears to leave the hole faster than it went in. My understanding of physics tell me that this is not possible, as any speed gained from gravity when it dips slightly into the hole, is lost when it gains height...

I m solving the problem in which the drop is falling from some height and its size is increasing with the rate dm/dt=kMv where v is the velocity of the drop at that instant , so we have to find the terminal velocity of the drop gained due to air drag, The problem is that if the drop gains...

Preface: Newbie here. Sorry if this has been asked before - I did have search but couldn't quite find what I was after. Also, I'm not putting this into the electrical engineering section because I don't want what will inevitably be an electrical engineer's answer =) Here goes: Voltage across...

we are required to do an egg drop. all we are allowed to use is 2 news paper spreads, 2 m string, and masking tape. what's the best way to use these materials in order to be able to drop a hardboiled egg from a 4th floor without any cracks. thanks!

Hi all, This is what I currently have. Water chiller with a flowrate of 2GPM (Choked to 2GPM) Ti= 50F H20 Pi=55-60psi It is a closed loop system. I am looking to split 1 line at 2 GPM (55-60psi) into 8 smaller lines that will run into my cooling jacket. All 8 lines are same length...

Homework Statement A pair of horizontal parallel plates are placed a small distance, 4.50 mm, apart in air. Each plate is rectangular with a width of 10.0 cm, and length of 46.0 cm. The potential on the upper plate relative to the lower plate is 1.03 × 103 V. A tiny drop of oil with an...

Trying to calculate this for work. Have 160,000 lbs drop 45 ft with mud weight of 16.5

Hi, I am hoping you can help me understand this concept. I've always known that generators operating a leading power factor lowers voltage drop and a lagging power factor increases voltage rise (as seen here...

According to my knowledge, I am able to apply Newton's second law on an egg for an egg drop; the resulted force from that can would be the force which occurs when it hits the ground. That force would also be reflected when it hits the ground according to Newton's third law. What is confusing...

As previously described,* might one drop a 10x10x10 ft cement cube at 15-20 ft from Gulf of Mexico oil/gas conduit. The intent is to seal up such conduit extending down ~1000 ft below sediment surface. The non-compressible fluid collapsing and sealing soft metal casing and compressible gaseous...

Core Drop As previously described, might one drop a 10x10x10 ft cement cube at 15-20 ft from Gulf of Mexico oil/gas conduit. The intent is to seal up such conduit extending down ~1000 ft below sediment surface. The non-compressible fluid collapsing and sealing soft metal casing and...

Hi guys, I'm looking at potentially dropping my computer engineering degree from my dual degree plan (EE is my other degree). I would still maintain an emphasis in computer engineering for my degree, but do you think by doing this I will be harming my chances to be employable after...

Homework Statement The Tower of Doom at Six Flags America lifts its riders to a height of 42.7 m, then releases them to free fall for 21.6m. How fast are the riders traveling before the magnetic induction braking system starts to slow them down?Homework Equations t = \sqrt{}2d/g The Attempt...

Homework Statement A little while ago I made a thread about the drop of a bullet due to gravity on a bullet with a constant velocity. Constant velocity is unrealistic, so I am going for a little more realism here. I am doing this assuming that I have detailed information about distance...

when Robert Millikan did the oil drop experiment to measure the charge of an electron . they balanced the gravitational force of the oil drop with the electric field . did they use F=qE , did they know how many electrons were in their oil drops .

so the reason why alternating current is used to deliver energy to households is because for a given wire, the voltage drop is always less with ac rather than dc right? but when i calculate the voltage drop it coumes out to be the same! v=IR R=P(length of wire)/(cross section area of wire) i...

Homework Statement I want to know that if there is a voltage drop across a resistor, why is it that voltage increases as resistance increases (Ohm's law)? Homework Equations None. The Attempt at a Solution N/A

Homework Statement The circuit has a battery Voltage of 30V, a resistor of R1(8ohms), R2 (2Ohms) and R3 (4ohms) in series. Calculate the voltage drop over R1 Homework Equations Please give me the proper equation of this? The one I've got says you take 30-8I-2I-4I=0 Wich gives you...

Hello, What would happen if I sent an electron into a neutral black hole? Assume basic (undergraduate) knowledge about black holes. I have studied in some details the Reissner-Nordstrom solution including maximal extension using Kruskal coordinates. Thank you!

http://www.associatedcontent.com/article/2695965/dsmv_aspergers_syndrome_to_be_eliminated.html?cat=5 The Proposed Changes to the DSM Will Move the Category of Asperger's Syndrome in with Autism In a draft released February 10, 2010, the American Psychiatric Association's DSM-V...