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# GCSE: Waves

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1. ## Industrial Visit to USL

This is a conflict between acceleration and the mass of the support. * But more crucially the specifics of the ultrasound technique. How sound is used to build up a picture of the inside of solid metal objects. Mechanics To enable the application of ultrasound testing it was desired by industry to have a fast rate of examination per object. Take the example of the fan blades for jet engines, before companies like USL developed machines to mount the transducers on, it took a man 2-3 hours to cover the entire surface of a fan blade, but now the same area can be covered in just 25 minuets, thanks to machine operated arms supporting the transducer.

• Word count: 1238
2. ## Investigation Into How the Depth of Water Affects the Speed of a Wave

5cms is a good height because it is high enough to cause a strong wave, but not high enough to create water to spill over the container's edge. I chose 3 laps because after that the wave starts to lose momentum and slows down. Apparatus 1 Container 1 Stopwatch 1 Ruler Water Prediction I predict that the greater the depth of water, the faster the waves will travel. The reason for this is that when the water is shallow, the container bottom begins to interfere with water motion.

• Word count: 1054
3. ## Electromagnetism Investigation

* Size of compass * Coating on wire (PVC) * Thickness of wire * Size of voltage - 12V * Type of nail Dependent Variables * Distance from electromagnet to the object. We will be measuring the distance of a compass attracted to the electromagnet. We will change only the amount of turns of the coil. We have chosen this because it the easiest variable to change therefore our results will be more precise. Prediction I predict that the more turns on the coil, the stronger the magnetic force, the further the compass will be.

• Word count: 1024
4. ## IB Physics Practical - Stubbiephone Wind Band

Therefore, to vary the length of the standing wave will require the length of the bottle to be changed. One way to do this is to fill the bottle with water. Referring to figure one(b), we can see that when a bottle is filled with water, the length of the bottle is reduced from L to L2. The frequency of a note (i.e. the pitch) is determined by the frequency of the standing wave. That is, if the frequency of the standing wave is of a high value, the pitch of the note will also be high and vice-versa.

• Word count: 1480
5. ## Factors Affecting The Strength of An Electromagnet

By introducing more current, the magnetism will increase. I also think more and more domains in magnetism will increase the magnetism in the core. The reason why I think this will happen is because solenoid are electromagnets and they creates magnetic fields when current flows through them which mean when the current increase then the flow of the current will increase the magnetism in the coil of wire. Equipment This is the list of the apparatus I will need and why it is needed: Variable resistor: -Fine control Ammeter: -Control decimal place (0.20, 0.30.)

• Word count: 1030