What is Drop: Definition and 875 Discussions

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. C

    Pressure drop expansion valves

    I'm having trouble understanding expansion valves. Gas leaving a diffuser increases its pressure as the cross-section increases (i.e as the gas expands), like in a compressor. We convert kinetic energy in potential energy. That I understand. But in a expansion valve, pressure drops as the...
  2. A

    Calculate air-flow using pressure drop

    At what speed (flow/volume for that matter) does air leave an outlet when you know it holds x bars in the pipe? (It goes from x to zero (or athmospheric) -- you know the pressure difference) I assume you can neglect relative roughness, resistance, and so on as the pressure drop is over...
  3. A

    How to find the flow rate trough a pipe using pressure drop

    Hi, I want to know how high the flow rate trough a pipe is (outlet), but I only now the pressure difference (0.7MPa or 7 bar), and the diameter of the pipe. At what speed (or for that matter volume) does air leave a pipe when the pressure difference is 7 bar, and the diameter is 25.4mm...
  4. U

    Voltage Drop and Power: Exploring the Difference

    Just curious: is the voltage drop across a load an expression of how much energy that device uses? If it is, what is the difference between voltage drop and power? Power is also used to determine the energy usage of a device, right? These aren't very important questions. I've just been...
  5. D

    Solving Fluid Problems: Distance of Water Drop

    Fluid Problems :( 1. Water is running out of a faucet, falling straight down, with an initial speed of 0.500 m/s. At what distance below the faucet is the radius of the stream reduced to one-half its value at the faucet? I tried doing this by using Bernoullis equation and replacing r with...
  6. A

    What Are the Coefficients and Stable Ratios in the Nuclear Liquid Drop Model?

    I have a number of difficult questions regarding this topic! 1. How to find the coeffients of the Liquid Drop model? I have a table of atoms with their masses, and total binding energies. Do I just fit the curve of the B/A vs A to get the coefficients? 2. In a Liquid Drop model, what...
  7. C

    Drop of water in slow motion - explanation needed

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  8. M

    Egg Drop Challenges: Ensuring Safe Delivery of 3 Grade A Eggs

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  9. A

    Shape of a drop on a flat surface

    Homework Statement Dear all, I am trying to find find out the shape of a drop on a flat surface. The requirement is the constant volume of the drop. Any help is greatly appreciated! Homework Equations The Attempt at a Solution I know that for the solution I must find out the...
  10. R

    Which class should I drop for an easier semester?

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  11. M

    Calculating Charge on Drop with Excess Electrons

    Oil drop weighs 5.8 x 10^(-15)N. It is suspended in a uniform field produced by a pf of 363V between 2 parallel plates 6cm apart. 1. Calculate charge on drop. 2. How many excess electrons does it carry? My question is, why are the electrons excess? The answer is 6, which is basically the...
  12. S

    Egg Drop Design Using Only Paper

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  13. X

    Confused: potential difference vs. voltage drop?

    Homework Statement In Fig. 28-5a calculate the potential difference across R2, assuming = 14 V, R1 = 6.0 , R2 = 3.0 , and R3 = 2.0. (image isn't working online, but it's a simple circuit- all the resistors are in series) Homework Equations V = IR The Attempt at a Solution Req...
  14. D

    Can Car B Make it Past the X in Time to Avoid Disaster?

    Car A is dropped at 4000 ft where directly below is an x on the road. At the instant Car A is dropped Car B is exactly 4000 ft from the x driving down the road at a constant velocity of 142 mph. Does Car B make it past the x in time to avoid disaster? It's such a simple kinematics problem...
  15. R

    NPN 2N3904 Transistor Voltage Drop

    Does anybody happen to know what it is, or how to find out the voltage drop of a particular transistor?
  16. B

    What is the formula for finding pressure drop in pipe flow?

    Hi, Which equation should i be using to find the pressure drop across a channel. I know the length of the channel, the hydraulic diameter and the reynolds' number. Thank you
  17. B

    Voltage drop calculation in 3 phase unbalance circuit

    Dear All, I’m facing some problem when I try to determine the total voltage drop (%) from the source to the load. Assume the condition as follow: 1. DB-A is serving 3 number of individual load (#1,#2 and #3) , each 100m away from DB-A, single phase, 5kw, pf=0.85, V=240V,by using...
  18. A

    Why Is There a Pressure Drop Across Valves Despite Bernoulli's Equation?

    Hi guys, i want to ask why is there pressure drop across valves? Because if you look at bernoulli's equation, the head will be the same in 3 points, before the valve, at the valve and after the valve. The only thing changes when a fluid flow through a valve is its pressure and velocity at the...
  19. R

    Solving Voltage Drop Problem on Robotics Project

    22 Dec 2009 21:16 Voltage drop question Hi All; Total noob, first post:smile: I'm working on a small robotics project. I have an embedded computer (5V) and 2 motors with a controller. It's all powered from a 4.8V NIMH battery. The problem I'm having; As the battery gets...
  20. S

    Solving Current Drop on TIP 31 NPN Transistor in Project

    Im working on a project that involves me making a electrical circuit that will supply initially around .52 amps of current for and then drop the current to at least .40 amps of current to a actuating wire that uses current to cause wire to contract. The way i have my circuit made is that i have...
  21. S

    Transmission Line, voltage drop

    Homework Statement Prove that for a line having resistance R, and reactance X, and supplying load of P+jQ has an approximate voltage drop of: Vr = [RP+XQ]/Vs Homework Equations none given. The Attempt at a Solution I made a diagram, with R, X, and P+jQ in series. Vr is the...
  22. S

    Voltage Drop: Source A to B in a Circuit?

    Is voltage the potential energy difference between source A and B in a circuit? If so in absense of resistance and the presence of a 3V battery does point A have 3V to begin with and at point B there is 0 volts. Is all potential energy converted to kinetic energy when moving from A to B? A is...
  23. S

    Voltage Drop in Diode: Exploring Causes & Amplifier Doubts

    the depletion region is resposible for voltage drop all that is fine but in forward bias there is no depletion region hence there can be no voltage drop but it is mentioned in my book that the voltage will drop by .7 volt how come this can happen also i have many doubts in transistor...
  24. B

    Spherical drop of oil question

    Homework Statement A spherical drop of oil, 1 mm in diameter, falls on a water surface. The oil spreads out to cover a circular patch of diameter 60 cm. The oil spreads out until it forms a uniform layer on top of the water, only one molecule thick. What is the thickness of this layer...
  25. R

    Fluctuating voltage drop in radio

    Hi Experts :!), I tried to use a 5v dc voltage source to power a normal handheld 3v radio using a resistor to regulate the voltage. The voltage drop across the resistor seems to fluctuate constantly by about +/- 0.8 volts. So, the voltage drop across the resistor fluctuates between 1.5v...
  26. brainpushups

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  27. B

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  28. L

    Find the Function of a Bungee Cord for Egg Drop

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  29. L

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  30. Spinnor

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  31. U

    What is the difference between voltage drop and wattage?

    Voltage drop is how much energy a device uses. Wattage is the rate of energy transferred into the device per unit of time. Aren't both essentially the same thing? Or am I just confused?
  32. O

    Projectile Motion Ball Drop: Solving for Initial Velocity with Given Angles

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  33. W

    How can the ranch hand successfully jump onto the galloping horse?

    Homework Statement A ranch hand sitting on a tree limb wishes to drop vertically onto a horse galloping under the tree at the speed of 9.28 m/s and the distance from the limb to the saddle is 3.84m. a) What must be the horizontal distance (m) between the saddle and the limb when the ranch...
  34. J

    Calculating Voltage Drop in an AC circuit

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  35. P

    Calculate Horizontal Ball Drop at 41.3m/s Velocity

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  36. M

    Pressure Drop vs Velocity in a Rectangular Pipe

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  37. N

    Stuck in a Lab Course - Should I Drop or Settle for a C?

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  38. P

    Calculating Pressure Drop Across Valve in Horizontal Pipe

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  39. N

    Calculate Power Margin Required to Prevent Satellite Link Drop

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  40. T

    Voltage Drop across multiple resistors

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  41. T

    Understanding resistors and voltage drop

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  42. D

    Water drop in electric field of the Earth

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  43. A

    Calculating the drop of a fleeing deer

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  44. H

    Egg Drop Challenge: Solving the Dilemma with Limited Materials

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  45. J

    Equation relating mass flow rate to pressure drop

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  46. R

    Is 1/R^3 descriptive of magnetic force drop off?

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  47. M

    Lab help (Millikan oil drop experiment)

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  48. K

    Can Rain Drops Power Our Homes? A Theoretical Calculation

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  49. E

    Why do water drops bounce on hot surfaces?

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  50. S

    Pressure drop across a packed bed

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