Standing Waves

When Fire and Music Meets Physics we get the Pyro Board The Pyro board is a metal box with speakers attached to it and propane ran into it. There are holes strategically placed throughout the top depending on the boxes overall size and design for the flames. After the Pyro board is built it can be used to demonstrate sound waves. The Pyro board is an adaptation of the Rubens tube. The Rubens tube was invented in 1905 by Heinrich Ruben to demonstrate the relationship between sound waves and sound pressure.

k called the “spring constant” is the variable we are trying to find as well is the total of the stress made on the object. Stress is the force on unit areas in a material that develops a result in externally applied force. The reason why k must be multiplied by two is because modern versions of the slingshot are designed to have a Y-shaped handle with two rubber straps and a pouch attached to the points. Since I pull the rubber band back to increase its displacement both individual strand is parallel producing the same spring constant. F would be measured the same since it would be calculated from both spring constants.

Then using the radiation sensor to measure the thermal radiation (4 surfaces). Also take notes of the voltage across the cube (voltmeter). Then using the target thermistor resistance at temp of 125 ͦC, 120 ͦC, 115 ͦC etc. (use a fan to cool the leslies cube) Theory: Stefan-Boltzmann law is defined as J=ɛσT4 Where T= radiates energy with radiant heat flux σ= 5.67x10-8 Wm-2 K-4 ɛ= (0,1) the ɛ is equal to when 1 when the object is a black body. In this experiment we are using a sensor that is emitting radiation and we must take into account the corresponding

An increment of 3cm for every x coordinate (x=0, 3, 6, 9, 12, and 15) and voltage readings of .25, .30, .50, .75, and 1.00 will be measured. Below are two tables (because two different metal plates are used) of data that illustrate the voltage readings collected during the experiment. The readings on the voltmeter measure the electric potential of two different charge distributions and this measurement can be used to find the electric field. Electric field lines starts on a positive charge and end on a negative charge. The number of electric field lines tells us the amount of

Testing the Strength of the Electromagnet by Changing the Number of Coils Aim The aim of this experiment is to investigate how the strength of an electromagnet is affected by the number of coil turns around the iron c-core. Hypothesis As the number of wire coils increases, the strength of the magnetic field (the electromagnet’s strength) will also increase. This means that the number of paper clips that attach to the electromagnet will increase. Explanation of Hypothesis/background: When a DC (Direct Current) electric current flows through a wire, a magnetic field is created. Wrapping the wire in a coil concentrates and increases the magnetic field, because the additive effect of each turn of the wire.

This stage is where the most errors happen in the processes of collecting blood. “pre-analytical errors predominated in the laboratory, ranging from 31.6% to 75%.” (Julie A. Hammerling, 2012) some of the errors are misidentifying the patients, Incorrect labeling of specimen, not using the right tube for testing, and not treating the specimen right. How you prevent some of these things from happing are simple. You

Physics, period 3 Malak Mokhles Data collection: Jan To measure the period of a swinging stopper for three selected radii in order to calculate the centripetal force Data Table Calculations Calculate the centripetal force acting on the stopper. (Fc=mac) 50 cm radius: (0.025kg)(50m/s2)=1.3N 35 cm radius: (0.025kg)(43m/s2)=1.1N 25 cm radius: (0.025kg)(39m/s2)=1.3N State the weight of the washers 50 cm radius: 15 washers=0.75N 35 cm radius: 15 washers=0.75N 25 cm radius: 10 washers=0.50N Calculate the percent error for each radius (% error =|theoretical - experimental /( theoretical ) | × 100%) 50 cm radius: |0.75 – 1.3 /(0.75) | × 100% = 73% 35 cm radius: |0.75 – 1.1 /(0.75) | × 100% = 47% 25 cm radius: |0.50 – 1.0 /(0.50) | × 100% = 100% Analysis/Discussion

Density Function ( ) ( ) ( ) ∫ ( ) ( ) ( ) ∫ ( ) ( ) { } ∫ ( ) b) Summarize the importance of Gaussian random variable The Gaussian density enters in all areas of science and technology. Accurate description of many practical and significant quantities which are the results of small independent random effects. The importance stems from its accurate description of many practical and significant real-world quantities. c) Draw the Gaussian density function ( ) ( ) √ ( ) Where and are real constants. Its maximum value √ occurs at .

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The form of Take Five is usually the introduction, the chorus, the improvisation (drums, piano, saxophone or bass), another improvisation (drums, piano, saxophone or bass), head and the ending. Texture The texture is how the melodic, rhythmic, and harmonic materials are combined in a composition, determining the overall quality of the sound in a piece. It is the connection between the tune and the balance in a piece of music, it is an element. In Take Five, the texture is monophonic, it's very light and clear. The melody in the saxophone is explicit and noticeable from the piano, double bass and the drums.