Exploring waves lab

The first video shows a transverse pulse wave, It is a non-repeating wave where the spring is pulled perpendicular to its regular direction.

The second video shows a periodic transverse wave, it is the same as the last one, but instead of only one disturbance, it is repeating.

The third video shows a pulse longitudinal wave, the wave travels in the same direction of the spring, we bunched u[ some of the spring to make this wave.

The last video shows a periodic longitudinal wave, it is the same as the third wave, but it is repeating, while the last video only had one wave.

Wave interference videos

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This video shows two crests colliding with each other. This is called constructive interference. When the two crests collide for he moment, they combine to create one bigger wave

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this video demonstrates destructive interference where a crest collides with a traugh. When they collide they cancel each other out.

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in this last video, we attempted to create a standing wave. In the video you can see the nodes where the destructive interference occurs, and also the crests and traughs where you can see the constructive interference.

How do noise cancelling headphones use wave interference to eliminate unwanted sound?

A microphone inside the ear cup will sense an incoming wave, it will then send and equal negative wave in the other direction towards the incoming wave to eliminate it. The headphones use destructive interference to eliminate incoming sound waves.

Physics 11 – Newton’s Laws

This first video represents Newton’s first law: Inertia. An object will stay in motion, and an object at rest will stay at rest. I used the cart to show an object in motion. According to Newton’s law, in perfect conditions, the cart will never stop rolling after I push it, but it will stop due to friction slowing it down (in the video it hit something). I used a weight to show that it will take more force to get the object to start moving, if I used more force it would have moved.

The second video represents Newton’s second law: F=ma. This law shows the relationship between Net Force, Mass, and Acceleration. You can use this equation to calculate how much force it would take to accelerate an object with a certain mass at that speed. I used two pineapples with different masses. To get both of the pineapples to accelerate at the same speed I would need to apply more force to the heavier pineapple. If I were to use the same force on each of the pineapples, the smaller one would accelerate faster than the larger one. Another example, is if you had two cars, one heavier than the other, it would take more force to move the larger car at the same speed of the smaller one.

This last video shows a example of Newton’s third law: F1=-F2. Every action will have an equal and opposite reaction. With an object resting on the ground, you would have the force of gravity pushing downwards, and also the normal force, equal to the gravitational force, holding the object up. In my example, I used a ball of silly putty to show the opposite force, when the ball hits the desk, it bounces back upwards. But then why, for example, does my textbook not bounce when I drop it? The bouncing happens die to the elasticity of the object, it depends on the objects ability to deform and reform upon impact, even if the object does not bounce, the upward force is still there.

Perfect Person

What is my version of a perfect human being? Well my definition of a perfect person is someone who is willing to do what is necessary, someone who is nice, intelligent, generous, and has a personality of their own. Really it is impossible for somebody to be perfect, but you can get close, but even then it is really hard to even be considered as a perfect person.

Kelly Technology TED Talk Reflection

         The question, “Has technology gone too far?”, comes up all the time, and it really is an interesting subject to discuss, there are many different arguments you can make for, and also many arguments you can make against technology. Overall technology will always be good because, technology gives us knowledge, it makes life much easier, and even the most dangerous things will always find a place they belong. As humans, we all have an unavoidable urge to obtain all the knowledge we can, and without the technology we have, it will not be possible, and if it weren’t for knowledge, we wouldn’t really have any place in this world at all. Why do we have technology? Humans use technology simply because it makes life easier, with technology we can communicate much more easily, we can get from one place to another very quickly, and also the food we eat id brought to us by technology, so without technology everyone’s lives would be much harder. Arguably the biggest argument against the advancement of technology is that it will eventually destroy us. In the TED Talk we were given the example of, nuclear energy. It was invented purely for destructive purposes, and that was the original use of nuclear energy, but instead of using it only for bombs, we started using it in power plants as a much better energy source than what we had before. In the end, without technology all our lives would be unimaginably different, and I believe with the advancement of technology, we will be able to solve all our current problems, and life would be much better for us.

“Technology has its own agenda, it wants to give us things, and what it gives us is basically progress.” (10:48-11:16)