The Physics Classroom. Nave, C. Power per Unit Area of Surface. Retrieved May 23, Jameco Electronics n. Science Buddies. How to use a Multimeter. Note: A computerized matching algorithm suggests the above articles. It's not as smart as you are, and it may occasionally give humorous, ridiculous, or even annoying results! Learn more about the News Feed.
You will need the following items from the kit. Photoresistor Digital multimeter Alligator clip leads 2 You will also need the following items not included in the kit : Lamp and lightbulb Tape measure Tape Cardboard box, or other item to make a platform so you can rest the photoresistor level with the lightbulb Dark room in which to do the experiment; the room should have as few external light sources as possible.
Figure 2. How to connect your multimeter to the photoresistor. Figure 3. Experimental setup. Photonics Engineer. Log in to add favorite More Menu Read More. Variations How does the resistance of the photoresistor change with distance? Make a plot of resistance versus distance. What is the mathematical relationship between resistance and distance? If you just glance at the graph, it might appear quadratic resistance increases with distance squared , but is that actually the case?
Equation 1 is derived from the graph on the photoresistor's datasheet. Can you derive Equation 1 yourself using the graph? This will require knowledge of log-log plots. The graph only shows a calibration range for the sensor from 1— lux. Skip carousel. Carousel Previous. Carousel Next. What is Scribd? Did you find this document useful? Is this content inappropriate? Report this Document.
Flag for inappropriate content. Download now. Save Save Words For Later. Related titles. Carousel Previous Carousel Next. Jump to Page. Search inside document. The benchmark for clarity and rigor, influenced by the latest in education research. University Physics with Modern Physics weaves exciting, contemporary physics throughout the text with coverage of the most recent research by the authors and others in areas such as energy, medicine, and the environment.
OpenStax's University Physics, 1st edition, is now enriched with WebAssign homework questions and student learning resources covering all 3 volumes, and is available as a low-cost option. Free essays, homework help, flashcards, research papers, book reports, term papers, history, science, politics Loading. As smart word, never ever judge the words from who speaks, yet make the words as your inexpensive to your life.
Start here to discover the ideal match for your teaching and learning needs. Hugh D. Tauck take a fresh and innovative approach to the university physics course. Young The Student Solutions Manual provides detailed, step-by-step solutions to more than half of the odd-numbered end-of-chapter problems from the text. Achieve University Physics coaches you through key physics concepts and applications with hints, answer-specific feedback, and fully worked solutions. Ling, William Moebs Rent Buy.
Douglas C. It is very helpful. This is an alternate ISBN. The Student Solutions Manual provides detailed, step-by-step solutions to more than half of the odd-numbered end-of-chapter problems from the text.
Dozens of exercises are included at all levels of complexity, many involving computer work. Get Prezi account access by signing into Prezi here, and start working on or editing your next great presentation. If an object is heavier the force of gravity is greater, but since it has greater mass the acceleration is the same, so it moves at the same speed if we neglect air resistance.
Free-body diagrams have been used in examples throughout this chapter. Westfall — 2nd Edition Milo D. View step-by-step homework solutions for your homework. Koretsky — 2nd Edition Maplesoft is a world leader in mathematical and analytical software. These textbooks are available for free by following the links below. Thank you so much crazy for study for your amazing services. This textbook survival guide was created for the textbook: University Physics, edition: Find Physics solutions and problems explained in educational videos on Numerade.
Hugh Young. Student solutions manual : University physics, second edition: 1. Physics concepts are clearly discussed and highlighted. Mats Selen earned B. An example is a car traveling at constant speed in a straight line.
E-book from. They combine their experience teaching biology Tauck and physics Kesten to Mats Selen. We review their content and use your feedback to keep the quality high. November 23, D, Science Buddies. You may have seen an odd "bending" effect when you put a straw or pencil in a glass of water: the straw appears to bend at the boundary between the air and the water.
Compare the two images in Figure 1 and see if you notice anything different between them. The straws in Figure 1, above, seem to bend because of a phenomenon called refraction , the bending of a wave as it passes from one material into another.
Waves travel at different speeds through different mediums such as air and water , and this speed difference makes the wave refract when it passes from one material into another. As light waves travel from the water into the air, the wave refracts, which makes the straws in Figure 1, above, look bent or broken. Can you see the refraction is different in the two parts of Figure 1, above? This is because one glass is filled with a denser solution than the other.
The denser the medium, the slower the wave travels through the medium. The speed at which a light wave travels through a medium is quantified in the index of refraction , n , of that medium. It represents the ratio between the speed of light in a vacuum and the speed of light in the medium of interest.
For example, the index of refraction of air is 1. The amount of refraction, or how much a light wave bends when it travels from one medium to another, is related to the indices of refraction by a mathematical formula called Snell's Law. We will use Figure 2, to understand Snell's Law. Figure 2 shows a ray of light the red line in Figure 2 passing from air white to water blue.
Note that both the angle of incidence and the angle of refraction are measured from a line perpendicular to the surface the light interacts with. This line is called the surface normal, or simply, the normal dashed gray line in Figure 2. Snell's Law tells us that the greater the difference between the indices of refraction of two materials, the more the light bends. If dissolving sugar in water creates a solution with a higher density than water alone, can you tell which glass in Figure 1, above, contains plain water and which one has sugar water?
If a light wave would travel through a prism filled with water, can you draw how the wave would be refracted? In this science project, you will use the physics of refraction to measure the sugar content of a clear liquid solution e. Figure 3, shows a picture of the basic setup of the experiment.
When there is no liquid in the prism, the laser will seem to shine straight through to a wall. See Figure 4. Refraction does happen as the laser beam crosses the prism walls, but the prism walls are so thin that we cannot see the refraction.
But, when the prism is filled with liquid, the laser is refracted twice, as shown in Figure 5. The diagram shows a top-down view of a laser from a laser pointer shining into a triangular prism filled with a clear liquid.
When the laser beam enters the prism it is refracted and turns upward. The laser beam turns upward again when it exits the prism and the emergent ray hits a wall above the original starting point of the laser.
The angle of minimum deviation is the smallest possible angle between the incident ray red line and emergent ray orange line , and it occurs when the light passing through the prism solid blue line is parallel to the base of the prism, as shown in Figure 5, above.
You can derive Equation 2 by applying Snell's Law twice once for each time the light wave changes mediums , and then using algebra, trigonometric identities, and the fact that the prism is equilateral. Equation 2, above, looks complicated at first, but it is actually not so bad. Then take the sine of the result, and multiply by 2. To do this project, you should do research that enables you to understand the following terms and concepts:. A simple summary of Snell's Law the "plug in the numbers and calculate" version required for this project :.
A fairly comprehensive tutorial that builds an intuitive understanding of Snell's Law using high school-level math:. These specialty items can be purchased from our partner Home Science Tools :. Proceeds from the affiliate programs help support Science Buddies, a c 3 public charity, and keep our resources free for everyone.
Our top priority is student learning. If you have any comments positive or negative related to purchases you've made for science projects from recommendations on our site, please let us know. Write to us at scibuddy sciencebuddies. Note: Do this project in an area where you can put a table close to a flat wall or window, and where taping paper to the wall or window is allowed.
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