Reflection is the change in direction of a wave front at an interface between two different mediums so that the wave front returns into the medium in which it originated. Common examples of this include the reflection of light, sound and water waves. In acoustics, reflection causes echoes. This is why when you go to a school concert, there are those white barriers behind the performers. They are there to reflect the sound from coming from the instruments to the crowd. Acoustics also play an impo
Physics is also used back in the times of WW2 where submarine warfare became used. There would be these submarine hunter ships equipped with sonar technology that would patrol the water s searching for submarines. They would send out constant pulses into the water and if they sensed something out of the ordinary, they would drop depth charges. By detecting the enemy submarine, you can determine the depth in which the sub is at and then you can set the depth charges to the nearest 10 meters of th
The Doppler effect is where the frequency of waves sound different because of an approaching or disappearing sound. For example, a fire trucks siren is blaring as they drive down cooper. While driving down cooper getting closer to the school, the sound waves come toward the school and have a higher frequency. And as the fire truck passes the school, the sound waves move away from the school causing a different pitch in sound. The Doppler effect also determines the speed in moving cars. Radar gun
When I first heard we were making speakers in physics class, I got pretty excited because I've never done anything like this before and I was very interested in how we could make them ourselves. First electrical energy from the in the Ipod turns into magnetic energy which converts to sound waves that travels through our ear buds or speakers and eventually hits against our ear drums which then converts again to pulses in our brain so we can understand the music. We made a very simple speaker out
Slinkeys and springs are a great example of the production and visualization of waves. First, there are two types of waves, transverse and longitudinal. By making bigger waves/ adding a bigger pulse to the slinkey, the amplitude will increase and by increasing the speed in which you produce waves, the frequency will also increase. Interference also occurs when two waves meet. If a person at the end of the slinkey creates a wave at the same time you make another wave, the waves will interfere cau
I have always had the dream of one day skydiving somewhere in the world. And since physics is everything, there is physics involved in skydiving. As you fall towards earth there are a few things that are involved in pulling you towards the surface of earth. Your weight is something that is involved in your fall to earth. The greater you weigh (mass), the faster you will fall to earth. Another thing that is involved directly with that is gravity. With the force of gravity pulling on you too, you
When the first snow of the year comes, we all make that first snowball. And getting into a snowball fight is a staple of the winter season. A lot of people I know can't throw very well or cant throw at all. I tell them that because of all the things we learned in physics, we can fix the way they throw a snowball so they can become a better thrower. First, throwing the snowball at a 45 degree angle will maximize the distance of the snowball. Along with that, having a good follow through will ensu
There are a lot of different things within physics that apply to the game of football. One of these is momentum. In football, its all about hitting the guy with the ball or just hitting the guy in front of you to make the block. A tip that most people say is that right before you get in the collision, you must relax your body to reduce injury. This also helps the shift in momentum because when you do this, you are allowing all the energy in your body to be transferred into the other player (Shi
I currently have a job at wegmans as a cashier and it is quite the job. meeting and greeting those who come through my line. It is easy to see that there is plenty of work being done. My manager came to me the other day with a fun face that I life about 700lbs or 317.5Kg. To determine the amount of work that I do at work, I can use the formula W=Fd. This formula also breaks down into W=(m)(g)(h). To determine the amount of work I do in placing the groceries into the cart I can use this formula.
So in the past few weeks, I have witnessed a few car accidents throughout the Rochester area and I thought doing the physics of crashing a car would be quite the topic. When a car and a truck collide, there is a change in momentum. Momentum is equal to the mass multiplied by the velocity of the object. When the car with a smaller mass hits a truck with a higher mas but , there is a shift of momentum between the two objects. therefore an heavier object can cause a larger impact due to the greate
Throwing anything typically involves us to pick up that object and manually throw that object in any direction. As we learned in physics, if you throw an object forward at a 45 degree angle, the object will have a greater dstance. We used this method and smarts during the construction and launching of our catapults last week. My group members along with myself built out catapult to our belief that we were gonn shoot for 80 yards. ha...silly people we are. Once our dream became more relistic, we
Hello, my name is Paul and I am currently a senior at IHS and I am taking physics because i thought it would be an interesting and hands on class. So far this year it is living up to standards. Overall, im taking physics to help understand why acts the way it does like jicking a soccer ball. I've been playing soccer since I was 3 and now with the help of physics, I can now know what kind of forces and such act on a ball as its kicked.
As we know physics is involvoed with everything especial
The pages of APlusPhysics.com, Physics in Action podcasts, and other online media at this site are made available as a service to physics students, instructors, and others. Their use is encouraged and is free of charge. Teachers who wish to use materials either in a classroom demonstration format or as part of an interactive activity/lesson are granted permission (and encouraged) to do so. Linking to information on this site is allowed and encouraged, but content from APlusPhysics may not be made available elsewhere on the Internet without the author's written permission.
APlusPhysics.com, Silly Beagle Productions and Physics In Action materials are copyright protected and the author restricts their use to online usage through a live internet connection. Any downloading of files to other storage devices (hard drives, web servers, school servers, CDs, etc.) with the exception of Physics In Action podcast episodes is prohibited. The use of images, text and animations in other projects (including non-profit endeavors) is also prohibited. Requests for permission to use such material on other projects may be submitted in writing to firstname.lastname@example.org. Licensing of the content of APlusPhysics.com for other uses may be considered in the future.