PK-S Lab 03 – Lab Report Name: ____________________ Section: ___________________ EXPERIMENT 3: Trigonometric Measurements Procedures: 1. Experimental measurement of the angles and sides of a right triangle: A. Create a triangle by taping a string against a wall and taping the bottom of the string to the floor or a table set against the wall. Make sure that the wall is perpendicular to the floor or table by measuring angle C, which should be 90o. B.
Jessica Yan Rick St. Denis, Tyler Wiseman 13 September 2012 Projectile Motion: Ball in the Bin Purpose: The purpose of the experiment is to determine the velocity of a ball launched from the Projectile Launcher device, and then to use that velocity to find where on the floor the ball will land given a specific angle. Theory: Two-dimensional motion is as it sounds, made of the two components of Vertical velocity and Horizontal Velocity. Horizontal Motion can be described as constant, neglecting air resistance, and Vertical Motion is characterized by the acceleration of gravity pulling at 9.8m/s². In this particular experiment, the total velocity will be split into the two components in order to find the time in the air, and horizontal distance from the launcher. The motion of these components can be described as d=vt for constant horizontal motion, and d=1/2at² + Vit.
5. Compute a linear least-squares-fit of the calibration data and plot the resulting line on the same graph as the calibration data. Comment on the linearity of the pressure transducer and scannivalve. Part 3: Calibration of the Tunnel 1. Connect the micromanometer (calibrated in Part 2) across the wind-tunnel contraction in order to measure the static pressure drop.
16. Observe well #1 while a reaction occurs. Stop your watch when you can no longer see the X sign through the bottom of the well. Record the exact time in seconds under the Trial 1 column in the Data Table 1. 17.
A ball was diameter was taken of the ball (in cm). The projectile launcher had to be leveled by the inclinometer. Afterwards, using the projectile ball, and the ram rod, the projectile had to be shot onto the clip board with the carbon paper attached to it. The geometric center of the trials was taken; this height was the initial height of the projectile. The launcher had to be relocated to an appropriate distance that will let the projectile strike the lower portion of the target.
The scientist has a double slit of known separation. Describe the measurements that need to be taken and explain how they are used to find the wavelength of the light. Discuss any necessary safety precautions and how you would arrange the apparatus to improve accuracy. Measurements * w measured with vernier calliper * D measured with a meter rule Finding the wavelength * Use λ=wsD to obtain value for λ Accuracy * Several fringe spaces measured * Centres of fringes used * Five or more fringes measured * Large value for D * D greater or equal to 2m * Dark room * Repeat measurements Safety * Avoid shing laser at a person * Laser safety goggles * Avoid reflections * Warning sign or light Figure 4 shows a stationary wave on a string. The string is tied onto a thin metal bar at A and fixed at B.
Replace the ramp as in Figure 3.1. Figure 3.1: Equipment Setup Mark with pencil Photogate Use a plumb bob to determine the point directly below where the ball will leave the edge of the table after rolling down the ramp. Measure the distance from the floor to the top of the table at the point where the ball leaves the table and record this value as dy. Ramp Ramp To measure the position where the ball will strike the floor after rolling down the ramp, tape a piece of plain paper onto the floor with a piece of carbon paper on top. The impact ® LED comes ON LED goes OFF Figure 3.2: Measuring Dd 9 Photogate Timers 012-06379A of the ball will leave a clear mark for measuring
e) Determine the mass of the slug by subtracting the mass of the beaker alone from the mass of the beaker + slug. Part II. Using the electronic balance Electronic balance: Direct weighing a) Left click on the beaker + slug from part 1. b) Select transfer to new container, and choose electronics balance using the dropdown in the new window. c) Record the mass that appear on the front of the balance. Electronic Balance: Weighing by Difference a) Select the balance with the slug.
The first test tube will be control, the second will be substrate and indicator dye, the third will be dilute extract, the fourth will be the same contents as the second, the fifth will be medium concentration of extract, the sixth will be the same contents as the second, and the seventh will be concentrated extract. 3) Add stock solutions to each tube using the corresponding graduated 5 ml pipette or dispensing device. 4) Adjust the spectrometer to zero absorbance at 500nm. Pour contents of test tube 1 into a cuvette. ) Make sure to keep time, read the spectrometer, and record the data.
Place the clean cuvette containing the “yellow” sample into the spectrometer, orienting the cuvette so that the clear sides of the cuvette line up with the white arrow in the cuvette. Click the “Collect” button on the LoggerPro software to begin collecting spectrum data. After a few seconds, the spectrum should appear on the software. Click “Stop” to end the data collection. Repeat the steps used to collect the spectrum data from the “yellow” sample for the “green” and “blue” solutions.