Design of Customer Input Form
Design of Input/Output Design of Customer Input Form Design of Sports Hall Reservation Form Design of Menu System Design Of Customer Report (Sorted by surname) 102 ADG Brown 116 High Street, 028 £120 Family 5 Belfast 9012 5477 125 SR Collins Farm house, Farm 028 £60 Single 2 Street, Saintfield 9154 4625 116 AJR Drennan 12 Portaferry Road, 028 £40 Single 4 Greyabbey 4277 8514 Reservation List 01 15.00,12/11/02 02 12.00,15/11/02 12 11.00,05/01/01 Member Labels These can be printed onto a page of labels, which can then be stuck to envelopes and sent out to the members of the gym. These addresses can be retrieved from many sources, so you could either use all the members or create a query and search for a specific reason to send out letters. Data Checking & Controls I will be using many validation checks in my system, including input mask, length checks and character type checks. Input Masks This is a way of ensuring only the correct characters are input into the field, and also in
The aim of my investigation was to explore the viscosity of golden syrup using stokes law to calculate the viscosity of the liquid.
Stokes's law is the basis of the falling-sphere viscometer, in which the fluid is stationary in a vertical glass tube. A sphere of known size and density is allowed to descend through the liquid. If correctly selected, it reaches terminal velocity, which can be measured by the time it takes to pass two marks on the tube. The aim of my investigation was to explore the viscosity of golden syrup using stokes law to calculate the viscosity of the liquid. Apart from superfluids, liquids and gasses have the property of viscosity. Viscosity is measured in Pascal-seconds; this describes its resistance to deformation and the ease that which it flows. Viscosity is internal friction this is due to intermolecular forces, this is affected by temperature and pressure if gas but just temperature if liquid. Newtonian fluids viscosity stays the same regardless of temperature or any other force. Liquids with a high viscosity flow slowly (like golden syrup), whereas liquids which have lower viscosities flow faster (like water). There are many ways to measure viscosity. However I chose to do so by using a chrome ball bearing as this was the only sphere shaped object available to be used in the lab. Stokes Law was derived by George Gabriel Stokes in 1851. This describes the drag force which is exerted on a sphere in a Newtonian fluid. The frictional force is measured in Newton's which is
The experiment involves the determination, of the effective mass of a spring (ms) and the spring constant (k).
Investigation of the Properties of a Spring 14/11/99. Introduction The experiment involves the determination, of the effective mass of a spring (ms) and the spring constant (k). It is known that the period (T), of small oscillations of a mass (m) at the end of a helical spring is given by the formula: T= 2??(m+ms) k In this experiment the same clamp was used for all readings to make sure there were no miss-readings taken due to differences in the way the clamp and stand reacted to the movement of the mass. Also the spring in all readings was the same as, after all the ms and k of two different springs is going to be different and lead to different readings. The things that were varied in the experiment were, the number of slotted masses on the end of the spring and the number of oscillations of the mass to be counted. The number of oscillations (T) will be measured using a stopcock. Which was varied to give a number between 20 and 30. To keep the number of oscillations, for every mass as similar to each other as possible. To help keep the experiment fair. So to find ms and k the following experiment was devised and carried out: A clamp and stand were used to hold a spring in position, onto which varying sizes of mass were placed. These masses were allowed to bob on the bottom of the spring and a specified number of oscillations were timed using a stop
Modeling a basketball shoot in the lab
Modelling and investigating the farthest range from which a basketball can be shot into a ring By Janice Lau (U6th) Content Page Aim Background Information Calculations and Diagram- prove that it's a parabola Theory- PROJECTILE MOTION AT AN ANGLE How to model a basketball shot? Apparatus Force vs. Compression - Spring Loaded Plunger Prediction/Safety Experiment 1 - Preliminary investigation Experiment 2 Research about Basketball Experiment 3 Experiment 4 Experiment 5 Conclusion Evaluation Source 3 3 4 5 6 6 6-10 0 1-12 3-14 5 5-17 7-18 9-20 20-21 21 21 The AIM of my investigation is to find the optimum angle for the maximum range for a basketball shot by modeling it in the lab. Background- PROJECTILE MOTION Definition: "An object launched into space without motive power of its own is called a projectile. If we neglect air resistance, the only force acting on a projectile is its weight, which causes its path to deviate from a straight line."1 The projectile has a constant horizontal and vertical velocity that changes uniformly when it is influence by acceleration and gravity. Diagram: Fig 1 &2 shows that basketball shots are projectile motions, however, how can we show it mathematically? Calculations Consider the horizontal and vertical motion individually. Initially, Ux = u cos ? ----- (1) Uy = u sin ?----- (2) The horizontal
Physics Investigation Aim: To investigate the variables which effect the strength of an electromagnet and find the effect of a particular variable.
Physics Investigation Aim: To investigate the variables which effect the strength of an electromagnet and find the effect of a particular variable. The variables, which would effect the strength of an electromagnet, are: ) Current 2) Number of turns 3) Type of core. ) Current has an effect on the strength because a bigger current makes a stronger magnetic field. 2) Number of turns; the more turns on the nail the stronger the magnetic field. The number of turns depend on the length of wire. The longer the wire, the more turns. 4) Soft iron core to increase the strength of the magnetic field. In this investigation, I am going to investigate what the effect of the number of turns will have on the strength of an electromagnet. Prediction: I predict that in this investigation, the higher the number of turns, the stronger the magnetic field. This assures that the other variables are kept constant. Apparatus: ) Insulated wire - wire to make the electromagnet. 2) Nail - to make the core. 3) Ammeter - to check if the current is constant. 4) Force meter - to check the Newtons. 5) Lead - to connect. 6) Crocodile clips - to join the leads together. 7) Clamp stand - to hold the nail. 8) Battery - to put on the volts. Method: After getting the apparatus ready we put 10 turns of the wire on the coil. Then we turned on the ammeter and wrote down the current and at the
Building a hovercraft with household objects.
Building a hovercraft with household objects. Abstract The coefficient of static and kinetic friction between a board and the ground is very high. Therefore trying to slide this board across the ground would be quite difficult. It is thought that if there is a pocket of air between the board and the ground, the coefficient of friction will go down, therefore the force due to friction also will, and the board will be moved easier. Although the force of friction is essentially impossible to completely get rid of, it can be minimized substantially. With this pocket of air between the board and the ground, the board will glide above the floor with very little friction. This device would be known as a hovercraft, because it is "hovering" above the ground. Purpose To build a functioning hovercraft, efficient enough to carry the weight of a person using household objects. Design The hovercraft will be built using only materials that can be found in the typical Muskokan home. A leaf blower will be used to supply the airflow, a piece of plywood will serve as the base, and a tarp will be used to bladder the air, and to pressurize limit the airflow. Duct tape, industrial staples, and spray adhesive will be used to hold the tarp to the plywood. Materials * 16 square foot sheet of 3/8 inch thick plywood * Large industrial tarp * Leaf Blower * Frisbee * 2 inch,
Hockey Skills
Hockey Skills Introduction Hockey, or Field Hockey as it is known in some parts of the world, is a stick and ball game with origins dating back thousands of years. It is traditionally played on grass, but more often these days - especially at the top levels and in certain countries - hockey is played on synthetic surfaces. In hockey, two teams of 11 players compete against each other using their 'hooked' sticks to hit, push, pass and dribble a small, hard, usually white, ball, with one aim in mind - to score by getting the ball into the opponents' goal. To do that, they have to get the ball past the other team's goalkeeper, who protects the goal, and logically, tries to keep the ball out! Player positions As already mentioned, every team must have a goalkeeper. The other 10 players are referred to as 'field players', and are dispersed over the field of play. The field players can be put into three general categories - attackers, defenders and midfielders. While no player (other than the goalkeeper) has an exclusively defined role, the attackers are generally on attack, the defenders are generally on defence, and the midfielders do a bit of both! Stick handling An essential skill necessary for playing hockey is the ability to control, pass, push, stop and shoot the ball with your hockey stick. This is known as stick work, or stick handling. It is both beautiful
Objective of Experiment. To use a search coil and CRO to investigate the magnetic field due to a straight wire carrying an alternating current
Daswani 7A (27) Magnetic fields around electric currents I - straight wire Objective To use a search coil and CRO to investigate the magnetic field due to a straight wire carrying an alternating current Apparatus Search coil, lateral and axial CRO Signal Generator Ammeter Low voltage power supply PVC-covered copper wire Rheostat Slotted base Perspex strip Crocodile clips Connecting leads Theory The magnetic field due to the electric current in a long straight wire is such that the field lines are circles with the wire at the centre. The experiment should show that the magnetic field B at a point near a long straight wire is directly proportional to the current I in the wire and inversely proportional to the distance r from the wire. This relation is valid as long as r, the perpendicular distance to the wire, is much less than the distance to the ends of the wire (i.e. the wire is long). The proportionality constant is written as ?o/2? , thus, The value of the constant ?o, which is called the permeability of free space, is 4? ? 10-7 H m-1. Procedure The circuit was set up as shown below. The signal generator was set to 5 kHz. The CRO was adjusted such that a trace was displayed. The frequency was changed to find out how the trace on the CRO was affected. The output of the signal generator was adjusted to produce a current. The time base was
Using a search coil and CRO to investigate the magnetic fields generated by alternating currents (A.C.) through a straight wire and a slinky solenoid.
Name: Pyrrhus Choi Tsz Kiu Date: 01-03-2010 Class: 6S Class no.: 8 Marks: /10 C15. Investigation of Magnetic Fields by Search Coil (Brief Report) In the report, all the number will be taken in exact or 3 sig. fig. Objective: Using a search coil and CRO to investigate the magnetic fields generated by alternating currents (A.C.) through a straight wire and a slinky solenoid. Part A. Magnetic field around straight wire Measuring the magnetic field generated 2cm away from the centre of the straight wire by search coil. Result Table of the Induced E.M.F. (?) of the Search Coil against Current (I) Induced E.M.F. (?) / V 0.5 0.6 0.7 0.8 0.9 .0 .1 .2 .3 .4 .5 Current (I) / A 0.8 .0 .12 .28 .40 .56 .80 2.0 2.1 2.3 2.5 Relationship between the potential different across the capacitor and the time From the above V-t graph, the curve is a straight line passes through origin. Hence, the potential difference across the capacitor is directly proportional to the time for the CRO trace to rise in steps of 1V and the slope () which represented the charging rate, is constant. Relationship between the charge stored in the capacitor and the potential different across it when the charging current is constant The area of the graph (Vt) represented the charge stored in the capacitor. As the rate
To see how the number of coils on an electromagnet affect its strength.
Title: Electromagnet Investigation Aim: To see how the number of coils on an electromagnet affect its strength. Scientific Knowledge: An electromagnet is a temporary magnet, meaning that it only goes and is in use, when you feel like it. Magnets have interesting properties. They can pull pieces of iron, cobalt or nickel towards them but not affect any other materials, even other metals such as copper or aluminium. When a magnet is freely suspended, it always comes to rest with the same pole facing north. This term is referred to as the 'north pole'; the other is the 'south pole'. If the north pole of a magnet is brought near to a south pole of a magnet, it will attract. However, if two poles are the same, they will repel meaning they will push away one another. This is where the saying is used, "Opposites attract." All of these things happen because they have magnetic fields around them. This 'field' can be easily seen if iron filings are shaken around a magnet. If you place a bar magnet with iron filings surrounding them, you can observe that the filings will be going around towards their respective poles on the other side. When you place iron fillings round a coil or solenoid, you will notice that the magnetic field round the solenoid has the same shape as the field round the bar magnet. You will also notice that the field inside the solenoid will be very strong and