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OksanaZ

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Blog Entries posted by OksanaZ

  1. OksanaZ
    We all listen to music daily and share a large appreciation for it however we don't necessarily stop to think about how music travels in sound waves or how they work. We all know that waves transfer energy but sound waves are considered mechanical waves because they require a medium in which they travel through which could be any substance or material that carries the wave along from one location to another and in this case, air would be the medium for sound waves. They travel through the air and our ears pick up the energy from these waves which vibrates against our eardrum and is converted to a nerve impulse which sends that signal to our brain. Sound waves are also considered longitudinal because the wave compression move left or right and the vibrating air particles as well move parallel to the direction the sound wave is travelling. Most of us listen to our music extremely loudly with our headphones blaring, and that means that the sound waves travelling have a high amplitude while when we listen to music as we're trying to fall asleep, its at a much lower volume to form a tranquil setting and those waves have a low amplitude, producing sound at a quieter volume. Also when listening to songs we notice that some singers have higher pitched tones than others and some lower. Having a high pitch indicates a higher frequency of a wave and those singing with a lower pitch indicate a lower frequency of a sound wave.
  2. OksanaZ
    We all listen to music daily and share a large appreciation for it however we don't necessarily stop to think about how music travels in sound waves or how they work. We all know that waves transfer energy but sound waves are considered mechanical waves because they require a medium in which they travel through which could be any substance or material that carries the wave along from one location to another and in this case, air would be the medium for sound waves. They travel through the air and our ears pick up the energy from these waves which vibrates against our eardrum and is converted to a nerve impulse which sends that signal to our brain. Sound waves are also considered longitudinal because the wave compression move left or right and the vibrating air particles as well move parallel to the direction the sound wave is travelling. Most of us listen to our music extremely loudly with our headphones blaring, and that means that the sound waves travelling have a high amplitude while when we listen to music as we're trying to fall asleep, its at a much lower volume to form a tranquil setting and those waves have a low amplitude, producing sound at a quieter volume. Also when listening to songs we notice that some singers have higher pitched tones than others and some lower. Having a high pitch indicates a higher frequency of a wave and those singing with a lower pitch indicate a lower frequency of a sound wave.
  3. OksanaZ
    When operating a vehicle, physics is involved in numerous ways. For instance when a car is parked and at rest it represents having an initial velocity of zero meters per second. Also, you have the forces of gravity and normal forces acting upon the car to keep it from moving on earth's surface. Since the vehicle is at rest, it also contains potential energy because its energy is stored and currently not at use. As soon as the car starts moving, you now have kinetic energy which represents the energy of motion and movement. The car is also accelerating and gaining speed, initially increasing its velocity as well. The first law of motion therefore affects us because while we are in a car, no matter how fast the car is going, we are also going that fast and we continue to go that fast until acted upon by an outside force. Therefore if while driving you crash your car, your body will resist the change in motion and unless something else stops it first, your body will crash as well. The invention of seat belts helps protect people from this danger/future accidents. Seat belts provide an outside force that slows down/or stops your body by decreasing the force of impact that could injury/kill you.
  4. OksanaZ
    While running on a treadmill one day I noticed that a lot of physics actually took place while running. When one engages in running, you use kinetic energy because your body is now in movement and using energy. When you first begin to jog or start running, your initial velocity is zero meters per second because your body is still at rest and hasn't fully begun to move yet. As you begin to engage in the activity, you begin to jog at a light constant pace which means you maintain a constant velocity. After awhile you might accelerate and gain speed, causing your velocity to increase steadily as well as your distance because your covering more ground. If you wanted to calculate your time while running, you could do so due to the information you know and by using a formula such as v=at. Another important thing to consider is posture and bending your arms and legs while running. Everyone runs with bent knees and arms at about 90 degree angles because its more efficient and makes the individual run faster compared to running with your knees locked and arms stretched out, swinging by your side but not being bent.
  5. OksanaZ
    When analyzing dance and the specific movements of dance, you realize that a lot of physics are actually involved in this activity. For instance, when looking at a dancer, you realize they maintain very good balance because its essential in being a good dancer. Having balance means that a dancer's center of gravity must remain directly above the area of contact with the floor because it will ensure positive vertical posture and balance that will keep you from tipping and falling over. Maintaining balance on flat foot is simple and easy, however it gets more difficult when there is less and less contact between your foot and the floor. For instance when dancing en pointe or up on your toes, balance becomes more difficult to reach. Also spinning in dance is affected by your rotation speed and resistance. When spinning with arms and legs freely open and swinging, your speed rotation decreases and resistance increases because your body is in a more open position. When spinning with arms and legs pulled in tight against the body, you'll notice that the speed of your rotation is much quicker and the resistance decreases because your body is in a closed position allowing you to turn more quickly and efficiently.
  6. OksanaZ
    Everything we do in life involves physics in one way or another and sports illustrate physics in many ways, especially in a game of kickball. To begin with, you have a person pitching the ball which they use the force of their arm to pitch the ball at a steady, constant pace. Depending on how much force the pitcher used, the ball either rolls all the way to the kicker's foot or it slows down and comes to a rest. This represents Newton's first law of motion because the ball keeps rolling until its acted upon by an outside force. Then the kicker responds by kicking the ball into the air which travels in a parabolic form and eventually comes down due to the force of gravity pulling it back down to earth. When kicked, the ball travels up at an angle, remains in the air for a split second where the velocity is zero meters per second and then comes back down. Also depending on the amount of force behind the kick, it determines the distance the ball will travel.
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