detection is the process of identifying potentially hazardous gas leaks by means of various sensors. These sensors usually employ an audible alarm to alert people when a dangerous gas has been detected. Common sensors used today include Infrared Point Sensor‚ Ultrasonic gas detectors‚ electrochemical gas detectors‚ and Semiconductor Sensors. More recently‚ infrared imaging sensors have come into use. All of these sensors are used for a wide range of applications‚ and can be found in industrial plants‚ refineries
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Motion 1 The table gives values of distance and time for a child travelling along a straight track competing in an egg and spoon race. Time (seconds) |0 |5 |10 |15 |20 |25 | |Distance (metres) |0 |8 |20 |20 |24 |40 | | a Copy the graph axes below on to graph paper. Plot a graph of distance against time for the child. [pic] (3) b Name the dependent variable shown on the graph. (1) c What type of variable is this? (1) d Use your graph to estimate
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Motion in 2D Simulation Go to HYPERLINK "http://phet.colorado.edu/simulations/sims.php?sim=Motion_in_2D" http://phet.colorado.edu/simulations/sims.php?sim=Motion_in_2D and click on Run Now. 1) Once the simulation opens‚ click on ‘Show Both’ for Velocity and Acceleration at the top of the page. Now click and drag the red ball around the screen. Make 3 observations about the blue and green arrows (also called vectors) as you drag the ball around. When the ball is stopped there isn’t any changes
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c. How far down is the water surface? 4. Aunt Minnie didn’t get her wish‚ so she goes to a deeper wishing well and throws a penny straight down into it at 10 m/s. How far does this penny go in 3 seconds? 75 m CONCEPTUAL PHYSICS Chapter 4 Linear Motion 13 Straight Up and Down The sketch is similar to Figure 4.9 in the textbook. Assume negligible air resistance and g = 10 m/s2. • Table 1 shows the velocity data of the figure for t = 0 to t = 8 seconds. Complete the table. Distances traveled are
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Substances Ø 9 & 10 Worksheets 6. Changes Around Us Ø 11 &1 2 Worksheets 7. Getting to Know Plants Ø 13 & 14 Worksheets 8. Body Movements Ø 15 & 16 Worksheets 9. The Living Organisms and Their Surroundings Ø 17 & 18 Worksheets 10. Motion and Measurement of Distances Ø 19 & 20 Worksheets 11. Light‚ Shadows and Reflections Ø 21 & 22 Worksheets 12. Electricity and Circuits Ø 23 & 24 Worksheets 13. Fun with Magnets Ø 25 & 26 Worksheets 14. Water Ø 27 & 28 Worksheets
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graph is to describe the acceleration of a free-falling object as being either constant or changing; as being directed upward‚ downward or both (depending on some other variable); and as having a particular numerical value.This lab deals with the motion of an object falling freely (assuming negligible air friction) under the force of gravity. The position of a falling object will be measured as a function of time‚ and its acceleration will be determined from those data. In regard to
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How Ultrasonic proximity sensor works An ultrasonic proximity sensor uses a piezoelectric transducer to send and detect sound waves. Transducer generate high frequency sound waves and evaluate the echo by the detector which is received back after reflecting off the target. Sensors calculate the time interval between sending the signal and receiving the echo to determine the distance to the target. When the target enters the operating range the output switches. The ultrasonic proximity switches are
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others. It also can be use at bath room. SENSING ELEMENT TYPE OF SENSOR: Proximity sensor NAME OF SENSOR: IR distance sensor w/cable (10cm-80cm) - GP2Y0A21YK0F MEASURED: Distances between a pipe and disturbance. RANGE: 20-80cm VOLTAGE OUTPUT: 1V-15V TEMPERATURE: -10°C to 60°C The sensors that have been chosen have a distance range around 10cm – 80cm where the sensors only works around that range. The size of the sensors also should be consider due it will fluency the size of pipe. If the cable
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Curvilinear Motion Projectile Motion When the player hits the “Sepak”‚ the motion of the “Sepak” is called projectile motion. The “Sepak” itself is called projectile. The “Sepak” will follow a parabolic path called trajectory especially if air resistance is negligible. Two coordinates are usually used to describe projectile motion: horizontal and vertical axes. The horizontal distance traveled by the projectile is called the range. While the vertical distance‚ that is‚ the distance from where
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projectile motion. A projectile is an object flying through the air that is only under the force of gravity (neglecting air resistance). A projectile moves both horizontally and vertically‚ which creates a parabolic flight path. In vertical projectile motion there is a constant velocity since there are no forces in the horizontal direction (neglecting drag due to air resistance). Consequently‚ there is no acceleration in horizontal projectile motion. In vertical projectile motion gravity is
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