Lab Report Physics

Students in an AP Physics lab perform an electrostatics experiment involving two charged spheres suspended

This is a process similar to the process that bats use sound to “see” in order to locate food. Understanding the process used by bats helps us understand the technology used in diagnostic medical sonography. First, the bat emits a sound then the sound waves bounce off of objects and reflect back to the bat. The direction where the sound returns tells the bat which direction the food is, and the time it takes for the sound waves to reach the food and return to the bat tells it how far the food is. Therefore, the longer the sound wave takes to return, the farther the food is. A sound is a vibration that is transmitted. In the case of humans, the ear is the medium by which sound is transmitted. All vibrations, including sounds, have a frequency. For our purposes, a frequency as it relates to sound is a measure of how often an object vibrates per second and is expressed in Hertz (Hz). The human ear can hear frequencies from 20 Hz to 20,000 Hz. Frequencies below 20 Hz are referred to as Infra Sound, and frequencies over 20,000 Hz are Ultra Sound. 1,

The clarinet is a woodwind instrament consisting of a cylindrical wood, metal, or ebonite pipe with a bell-shaped opening at one end and a mouthpiece at the other end, to which a thin reed is attached. The clarinet has five different sections, the mouthpiece, the barrel, the upper section, the lower section, and the bell. The length of the entire instrument is 60 cm long. The mouthpiece section consists of a slotted cylinder, to which a reed is attached by a metal clamp called a ligature. The mouthpiece plugs into the next section which is a barrel. The barrel is simply a connecting cylinder to which the mouthpiece and the upper section plugs into. The upper section is a cylindrical pipe consisting of 4 holes and 9 keys placed in

The sound waves are produced by a random oscillating crystal, and are inaudible to humans. A instrument called a

The purpose of this experiment is to measure the speed of sound in air and to determine the effects of frequency on the speed of sound.

Sound waves are nothing more than an energy transfer through a medium be it through a liquid, solid, or a gas. Sound pressure or intensity is measured on logarithmic scale in decibels dB which increases on an order of magnitude. For instance a quiet conversation would be around 30 dB and whereas the human pain threshold would be just over 100 dB. While the pitch or frequency of the sound is measured in hertz or Hz, the higher the hertz the higher the pitch of the sound and vice versa (Hildebrand, 2004).

Detects different physical characteristics of pressure waves: • Pitch: perception of the frequency of sound waves (umber of wavelengths that pass a fixed point in a unit of time) • Loudness: the perception of the intensity of sound (the pressure exerted by sound

This science fair project will test which antacids are most potent in neutralizing lemon juice. When an acid and a base combine the base will neutralizing the acid in a chemical reaction; this is how antacids work as well. Antacids are substances that will neutralize stomach acidity which in return relieves heartburn, indigestion, or stomach pain.

Sound waves are caused by disturbances in the air. These disturbances are usually caused by a vibrating object. In the case of the MTCC, the CTA train railroad is right above the MTCC. As the train is traveling along

Pickups convert the mechanical energy of the vibrating strings into electrical energy through electromagnetic induction. The permanent magnet of the pickup creates a steady magnetic field that changes as the strings vibrate. The coil wrapped within the magnetic field is induced with a current and voltage as said magnetic field alternates due to the vibrating strings. The output is an alternating current since the voltage alternates between positive and energy as the

Sound is a very interesting topic that many people do not fully understand. There are lots of questions on why or why not we can hear certain things and how do we process different sounds and vibrations. The first thing that is important to know before getting into all the details is that sound is release of energy and the energy is released in the form of vibrations. Then , the vibrations will emit from whatever has made the sound in what is known as a longitudinal wave. A longitudinal wave is a wave that travels in a sing direction.

The snail like shape of the cochlear effectively boosts the strength of the vibrations caused by sound, especially for low pitches. When sound waves hit the ear drum, tiny bones in the ear transmit the vibrations to the fluid of the cochlea, where they travel along a tube that winds into a spiral. The tube’s properties gradually change along its length, so the waves grow and then die away, much as an ocean wave travelling towards the shore gets taller and narrower before breaking at the beach.

It is within this framework that I consider important to study the way in which sound is

As a cellist for over six years, I wanted to understand the fundamental idea of why notes were audible. I asked myself, why do I press down on certain parts of the strings on a cello to produce certain notes? How are sound waves calculated? With these two questions in mind, I dove in with the desire to apply a different perspective of music.

The ears are one of the most complex and interesting systems thats human body has and the sounds we hear are actually in many different parts deflected, absorbed, and also filtered by our different body parts. It's then collected by our pinnae (the external part of or ears), whose dimensions further affect the sound on its way into ear. There, vibrations are translated into signals, which are interpreted by your brain. In the 1930s, two scientists at Bell Labs, Harvey Fletcher and Wilden A. Munson researched this process and what they discovered has changed and affected how we as humans understand the hearing process.