Drop Definition and 876 Threads

A drop tower or big drop is a type of amusement ride incorporating a central structure or tower. Drop towers vary in height, passenger capacity, lift type, and brake type. Many are custom-made, although there are some mass-produced designs. Riders experience free-fall initially, followed by rapid heavy deceleration.
With most drop towers, a gondola carrying riders is lifted to the top of a large vertical structure, then released to free-fall down the tower. Brakes slow the gondola as it approaches the bottom of the ride. Some designs expand on this concept with features such as rotating gondolas, or several bounces before coming to rest.
Most drop towers require child riders to exceed a minimum height; limits vary widely depending upon the nature of the tower, with a 9-metre (30 ft) tower for smaller children from 95 centimetres (37 in) tall, and a 35-metre (115 ft) tower having a 130-centimetre (51 in) restriction.Drop towers use a magnetic braking system to slow the carriage quickly and smoothly once it reaches the bottom of the tower. This system is fail-safe because magnets do not need to be powered by electricity or other sources; they work intrinsically by the laws of magnetism.

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  1. M

    How do I calculate pressure drop in a pipeline?

    Anybody can help me for calculating pressure drop in pipeline. I really appreciate the suggestions from your side. i have the values of dp for equipments and valves...i want to know how to interlink with these dp values for calculation...i want to know, how to calculate the dp of scrubber. i had...
  2. Y

    Oil Drop Electric Field Problem

    Homework Statement An oil drop is charged negatively. How much charge is on the drop if the Electric Field is 6,400 N/C at a distance of 1.2 m? Homework Equations E=k q/r^2 I don't know if I should be using that equation for this one. The Attempt at a Solution I tried to do E/(k x r^2) = q...
  3. H

    Drop in pressure, what volume is left?

    Homework Statement There is a vessel with 10 Liters of Liquid Nitrogen. The normal pressure is 100 Psi. After a couple hours the pressure is dropped to 47 Psi because of leak in the vessel. How much of the Liquid Nitrogen did we lose/is left in the vessel? Homework Equations I'm really not...
  4. L

    Potential drop across capacitor after very long time

    Homework Statement For the circuit shown in the figure, the switch has been open for a very long time. (a) What is the potential drop across the 15.0-mH inductor just after closing the switch? (b) What is the potential drop across the 70.0-µF capacitor after the switch has been closed for a...
  5. H

    Voltage drop question - need check/advice

    1. Homework Statement What do you predict the voltage will be measured from B to D directly? Vtot = 1.0 V peak-peak Two parallel branches, one with two 1.5 kOhm resistors in series, one with a 1.5 kOhm resistor and a 0.1 μF capacitor in series (see attached diagram) Homework Equations V=IR...
  6. S

    Trying to compare two different weights during drop test

    Hi guys, I am working on a project at work where we make part a which weighs 10 pounds and part b which weighs 13 pounds. Parts a and b both get packaged in a foam container. I have test data on part a that says it will survive drop tests, I was hoping to do analysis to say part b will also...
  7. S

    Trying to compare two different weights during drop through analysis.

    Hi guys, I am working on a project at work where we make part a which weighs 10 pounds and part b which weighs 13 pounds. Parts a and b both get packaged in a foam container. I have test data on part a that says it will survive drop tests, I was hoping to do analysis to say part b will also...
  8. D

    Flowmeter Problems: Investigating a 12l/min Difference

    Hi there, I am currently doing leak testing for a piece of equipment. In order to do so I have a flowmeter at the inlet and outlet (of what is essentially a long cylinder) and have air drawn through by a vacuum pump. Now, the problem is that even with no obvious signs of leaks the two flows...
  9. G

    Calculate Distance Dropped to Reach Speed of 10m/s

    I am looking at all these speed and acceleration equations on the net but can't find what I need. What I want to calculate is how far do i have to drop water for it to reach a certain speed? The only equations i see involve asking parameters that I don't know. the only thing i do know is...
  10. A

    Two Balls Drop, what happens to the distance?

    Homework Statement Ball A is dropped from the top of a building. One second later, ball B is dropped from the same building. As time progresses, the distance between them A) increases. [<-- Correct Answer] B) remains constant. C) decreases. D) cannot be determined from the information given...
  11. J

    Does Pipe Size Reduction Affect Flow Rate and Pressure Drop Significantly?

    0http://math.stackexchange.com/questions/946493/solve-for-pressure-drop-across-and-orifice# I'm running 1/2" pipe but the only way to connect a 9/16" flow switch is with a 1/4" adapter. I'd have to go from 1/2" down to 1/4" to the 9/16" flow switch down to 1/4" back to 1/2". I was wondering if...
  12. steves1080

    How do I calculate the pressure drop of air across an orifice?

    I am trying to size an orifice to place on an outlet of an air vent line. The reason for this is that I am installing a noise suppressing muffler, but it is only rated for 300 psig. Since I am venting a line that will be pressurized to 1600 psig, I'd like an orifice restrictor in order to...
  13. Z

    Should I just drop my physics class?

    Trying to keep this as short as possible, I'd like to be an engineer, and I'm currently taking an algebra-based physics course. It's not a class I need for my major (of course, I will need calc-based), but I've already passed the drop deadline, so I'll receive a "W" on my transcript. It's been...
  14. Rugile

    AC circuit - voltage drop and resonance

    Homework Statement An AC voltmeter connected to the nodes A and B shows the same value as when connected to the nodes A and D (refer to attachment). What is the inductance of the inductor? What value does the voltmeter show? The inductor is ideal. U = 70sin(314t) V, C = 80 μF, R = 500 Ω...
  15. S

    Why does a pressure drop in a pipe cause a force on the pipe?

    Hi, I just started a course in drilling and the first chapter is about various situations where pressure drops in the drill string (pipe) causes forces on the pipe. I understand that a pressure drop due to friction causes a downward force on the pipe. The fluid is "pulling" the pipe down...
  16. S

    Engineering Help with circuits (Current, Voltage Drop, and Power Dissipation)

    Homework Statement Basically, I need to know the power dissipation (W) for three resistors using aw 12V battery: 120, 80, and 50 ohms. https://webwork2.uncc.edu/webwork2_files/tmp/Fall2014-Engr1201-Common/img/2ff2f0ce-cb10-3786-8109-c42346130316___1a2e5eeb-8657-3983-941f-b7d8a9123afa.gif...
  17. BeautifulLight

    I don't understand how I am "calculating for the voltage drop"

    Assume I have connected a single light-emitting diode (2V, 30mA) and resistor to a standard 9V battery. Ohm's Law is used to calculate the value for the resistor. The observed relationship between voltage, current, and resistance is as follows, V=IR. I intuitively understand there will be a...
  18. ilovescience85

    Inductance, volt drop and time constant? Help

    Good evening all, I am looking for some clarity on a question I am answering at the moment. An inductor of negligible resistance and an inductance of 0.2H is connected in series with a 330ohm resistor to a 12v d.c. Supply determine: A - the time constant of the circuit B - the voltage...
  19. Saladsamurai

    Pressure Drop due to Vortex Shedding

    Take a cylinder in cross flow. We know that for Reynolds number greater than 40, we will start to see vortex shedding occur. Using the Strouhal number, we can determine the frequency at which vortices will shed. Using the coefficients of drag and lift, we can determine the steady loadings on...
  20. ranju

    Finding Output Voltage, Resistance Drop & Current in a Circuit w/ Zener Diode

    In the given circuit we have to find the output voltage , the voltage drop across resistance RL (RL = 10KΩ) and the current through the zener diode having zener voltage VZ = 50V By this question I want to be clear about the way to solve circuits with zener diode...please explain the...
  21. S

    Does Sheet Thickness Affect Voltage Drop Measurement?

    Hi I am very confused how can measure voltage drop of a sheet if 1 Ampere is passed and the sheet has a resistance of 0,01 ohm in sq does it matter the thickness of the sheet ?
  22. 1

    Should I drop all lab (2nd/3rd year)?

    I'm a student of physics at the University of Edinburgh in the UK. I'm going into my third year of a four year bachelors course. I now need to decide whether to continue with an ordinary physics degree or whether to choose the theoretical stream, which involves replacing all remaining...
  23. L

    The physics of blood pressure drop

    Hello everybody. I have seen many people asking questions on this forum about the reason to why blood pressure drops as you get farther from the heart. But honestly, not a single answer satisfied me. My major is physiology, so it's quite funny that I still don't know this "trivial" detail. What...
  24. N

    Pressure Drop Testing - Too Many Unknowns?

    Hello there, I am having a discussion with a co-worker about a pressure drop test. I have two different 'boxes' for which I don't know the pressure drop. What I want to know is the difference in pressure drop between the two 'boxes'. Knowns 1) PA1 = PA2 = PA = Inlet Pressure for...
  25. K

    Understanding Pressure Drop Calculations in Fluid Mechanics

    Hello. I have had an attempt at solving this pressure drop problem, but I have been told it is incorrect. I am very much a beginner in the area of fluid mechanics, so if you could please define any terms that you are using, that would be so helpful! I thought using the Hagen-Poiseuille would...
  26. J

    If there is really a potential drop across resistors

    How come capacitors receive the full emf In a circuit with a resistor in it? I plugged in 100000 into -t in the rc transient and it gives me the emf. Why? I thought you actually "lost" potential through resistors?
  27. D

    How can I improve my approach for calculating temperature drop in a quartz pipe?

    Hi there, I'm trying to find out the temperature drop of flue gas in an uninsulated quartz pipe in ambient air. I am fairly confident with my approach but receive erroneous answers. I have approached the problem as follows: 1) Calculate the prandtl number 2) Calculate the Re number 3)...
  28. J

    Dramatic voltage drop at voltage regulator output

    First time posting a problem on here. Be gentle on me :) So I ran into this problem when I was testing the power supply block for my senior project.I attached a pic...
  29. O

    Oil drop experiment electron charge

    The problem is based on the experiment conducted by Millikan to find the elementary charge. In the experiment, charged oil droplets are suspended between two charged plates with a known electric field between them. In this way, the charge of each droplet can be calculated (the mass is known)...
  30. J

    Why do electrons drop energy levels?

    I understand that a photon can be 'absorbed' by an electron resulting in the electron jumping to a higher energy level within an atom. I also understand that a photon is emitted when an electron jumps to a lower energy level within an atom. But why does the electron jump to a lower energy...
  31. curious bishal

    How Does X-Ray Ionisation Impact Millikan's Oil Drop Experiment?

    What is the use of X-ray in Millikan's oil drop experiment? It ionises the oil but what does the ionisation help in? If it creates charge, then the oil's charge keep on increasing it creates error in calculation as the oil drop is attracted upward after sufficient amount of charge.
  32. S

    Pressure drop across an orifice (Orifice pressure drop in meters?)

    Homework Statement ΔP = 1000 x 9.81 x (Orifice pressure drop in m) Pressure drop across orifice = 470.72 Pa 2. Homework Equations 3. The Attempt at a Solution I am not sure how this works. How can pressure be converted to meters? It does not make sense to me. Any...
  33. S

    Pressure drop across an orifice (orific drop in meters?)

    Homework Statement ΔP = 1000 x 9.81 x (Orifice pressure drop in m) Pressure drop across orifice = 470.72 PaHomework Equations The Attempt at a Solution I am not sure how this works. How can pressure be converted to meters? It does not make sense to me. Any help would be much appreciated...
  34. C

    Egg Drop Contraption: A Physical Science Project Report

    Hi, I am working on an Egg Drop Contraption as a Physical Science project. I need some help on a 1 page report I need to make. First, let me explain how my project will work so you can know how to answer my questions. I will have a box a bit bigger than the egg itself. The walls, floor, and...
  35. Duderonimous

    Excess Electrons, Milikan Oil Drop

    I am writing out the lab for the Milikan Oil Drop experiment and punching out the numbers has shown that my measured charge is off by a factor of 5 from the theoretical amount. theoretical: 1.6e-19 experimental: 3.16e-14 See if I divide this number by 2e5 (which means I am saying there are...
  36. KingCrimson

    What is it that causes electric current to drop after a step up ?

    what is that causes the current in the wire that has a stepped up voltage * in the transformer , the wire with more coils * to have a lower current ?
  37. K

    Electric potential difference vs. voltage drop

    Are these the same thing? Or does the electrical potential difference refer to the voltage source only?
  38. gfd43tg

    Calculating Pressure Drop in a Fluidized Bed of Spheres Using the Ergun Equation

    Homework Statement Air at 100 F is flowing through a packed bed of spheres having a diameter of 0.5 inches. The void fraction (ε) of the bed is 0.38 and the bed diameter is 2 feet. The bed height is 8 feet. If the air enters at 16.2 psia at a rate of 47.5 lb / min calculate the pressure drop of...
  39. S

    Pressure drop across a filter medium vs. time modelling

    Hello guys, I am a computer science PhD student. But my project somehow requires some knowledge about computational fluid dynamic modelling (both discrete and continuous). nowadays I am abit stucked in an issue. I want to model pressure drop across a filter medium dynamically. i assume i have...
  40. M

    Gas Flow Rate Calculation using Pressure Drop

    Homework Statement Hi everyone, I'm trying to calculate the flow rate of air in straight tubing that is 30cm long and has a diameter of .1875 in and has an outlet into a 100 mL vial which is vented to the atmosphere. The starting of the system pressure is 20 psi and the ending psi is 14.6...
  41. J

    How can I find the smallest positive integer number without dividing q by e?

    I've got mg=kvf, when the e-field is zero, (taking downwards direction as positive), k is some constant and vf is the terminal velocity of an oil drop. Then when the e-field is on, mg+kve=Eq, where Eq is the force from the electric field, and k is the same constant and ve is the drift velocity...
  42. gfd43tg

    Pressure drop at power station pumping power law fluid

    Homework Statement The Black Mesa pipeline transports 660 tons / hr of solid coal ground to 8 mesh (2.4 mm) as a 50 wt % slurry in water with an estimated sg of 1.26 for 273 miles across northern Arizona. The pipeline ID is 18 inches and the slurry flow rate (coal and water) is 4200 gal/min...
  43. M

    Getting the voltage to drop in a battery?

    Homework Statement Suppose that you have a 9.0-V battery and wish to apply a voltage of only 3.5 V. Given an unlimited supply of 1.0-Ω resistors, how could you connect them to make a “voltage divider” that produces a 3.5-V output for a 9.0-V input r=resistance of 1 resistor=1 R=Total...
  44. R

    Engineering Voltage drop w/ series/parallel circuit

    Homework Statement Find the voltage drop (V0) across the 3 kΩ resistor Circuit Pic: http://i.imgur.com/kX7hlQK.png CS1= 14mA CS2= 27mA R1 = 7kΩ R2 = 7kΩ R3 = 3kΩ Homework Equations Ohms Law & Current Division The Attempt at a Solution 1) First thing I did was combine the two...
  45. O

    Drop a ball - where does the energy go?

    Hi - If I lift a bowling ball in the air, so that it has potential energy, then drop it on the dirt, it makes a sound and a dent. Where did all the energy go? It did not all go to sound, since there's a dent, right? A small bit went to heat... what else? Thanks
  46. N

    Placing x-markers to drop water balloon on students

    Homework Statement You and your roommate plot to drop water balloons on student entering your dorm. your window is 20m above the side walk. You plan is to place an x on the side walk to mark the spot a student must be when you drop the balloon. You note that most student approach the dorm at...
  47. D

    How Do You Calculate the Correct Aiming Angle to Compensate for Bullet Drop?

    I'm hoping that someone on this board can tell me where I'm going wrong here. Basically, I'm trying to calculate the upward angle at which one would need to aim a gun in order to fire a bullet to perfectly compensate for the effect of gravity on the bullet during the course of its flight over a...
  48. L

    SEMF Liquid Drop Model Homework: Struggling with (ii)

    Homework Statement See attachment. Only struggling with (ii). Homework Equations The Attempt at a Solution So ultimately after doing everything, calculating B(ε)-B(0) & assuming z>>1 and z2/A > 47 I find that B(ε)-B(0) > 0.048ε2A2/3 I don't really see how this tells me if the nuclei will...
  49. P

    Calculating the pressure drop in a contraction?

    Homework Statement Water flows at room temperature in a horizontal pipe with mean velocity of 1 m/s. Then a sudden contraction of the pipe changes the diameter to half the upstreams diameter (##\frac{D_1}{D_2} = 2##). What is the pressure drop (##p_1 - p_2##) from a point (1) upstream of...
  50. B

    Does using the em field generated by flowing elctricity cause V drop?

    I was wondering if you were to use the em field caused by electricity flowing through a wire or coil to push a magnetic or object would you effect the flow of power in the line. Like if you were to wrap a one phase of transmission lines around a solenoid type device to use the em field to push...
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