We also need a stopwatch to measure the time duration and a measuring tool to determine the length of each experiment. Once the bob is attached to the string and the string is secured to the anchor we take a measurement of the distance from the anchor to the center of the bob. Next we hold the stopwatch and pull the bob out about a few inches and as we let it swing we start the stopwatch and let the bob swing from side to side ten times and stop the time when the bob reaches the starting point on the tenth swing. Once the stopwatch is stopped record the time measurement and move the decimal place to the left one place or divide by ten to average the ten complete swings. Next we will take two raps of the string on the anchor point and measure the distance from the anchor to the center of the bob and record that measurement.
Short bursts of ultrasound waves can be used to measure the depth of the sea. The waves are produced by a crystal vibrating at a very high frequency. (a) Which of the following frequencies could be ultrasound? Circle the correct answer. 15 Hz 250 Hz 15 000 Hz 25 000 Hz (1) (b) Why can humans not hear ultrasound?
After we had taken all of our measurements we had to decide which setting we were going to fire the ball at. We chose long. We took turns firing the ball out of the spring loaded gun and calculated the velocity by recording the position degree at which the pendulum swung after the ball had collided with it. We repeated this experiment for five trials and recorded our data. Data: Procedure 1 m = .0657kg | M= .2426kg | y1= .059cm | Trial | p | y2 (m) | y2-y1 (m) | V (m/s) | Xvo (m/s) | 1 | 39⁰ | .145 | .087 | 1.31 | .315 | 2 | 38.5⁰ | .144 | .086 | 1.30 | .315 | 3 | 38.5⁰ | .143 | .084 | 1.28 | .311 | 4 | 38.5⁰ | .144 | .085 | 1.29 | .313 | 5 | 38.5⁰ | .144 | .085 | 1.29 | .313 | Our m is the mass of our ball and M is the mass of the pendulum just by itself.
Displace the masses to cause oscillation 5. Measure the time taken for 10 oscillations, therefore get the time for 1 oscillation Set up the experiment as shown below: Results: length | Time | Ball size | 138.5 | 2.48 | S | 45.8 | 1.39 | S | 39.2 | 1.19 | S | 32.5 | 1.2 | M | 42.8 | 1.25 | M | 36.5 | 1.18 | M | 33.4 | 1.15 | M | 26.4 | 0.94 | L | 19.2 | 0.8 | L | 12 | 0.63 | L | Analysis: The graph of pendulum is shown on the page enclosed. The graph of the time taken for 1 oscillation and length of pendulum is a linear graph. The above table shows that time period of a pendulum varies with the length of the pendulum.The time taken for 1 oscillation is calculated by dividing the time for 10 oscillations. Question discussion: Why did we time 10 oscillations of the pendulum?
Research Question : What is the terminal velocity of a ball bearing in glycerin? Independent Variable: Distance travelled Dependent Variable : Time Controlled Variable(s): Height of Release Apparatus : * Glass Tube * Glycerin * Ball Bearings (3-4 mm in diameter, iron) * Clamps * Meter Stick * Stand * Iphone’s “Stopwatch app” Using a meter stick every 5 cm incresements were pointed out on to the side of the tube. Care was taken to start the measurements at the top level of glycerin, the bearing was released at the top of the tube. The time was measured by a group of Three people , one releasing the bearing ,second carefully observing the bearing as it fell through glycerin, third handling the stopwatch .Second person called out “lap” every time the bearing passed one of the 5 cm marks on the tube, after this call a person holding a stopwatch was supposed to obtain the split time between each of the 5 cm markers. The uncertainty in the distance is ±0.5 cm because the ruler had 1 cm markings.
The test facility was made to run for 3 min before the test to attain steady condition. The duration of each record is 2 seconds, which gives a number of samples per second. All the nozzles are convergent with a circular inlet having diameter of 13 mm which varies smoothly along the length of the nozzle to a different geometrical exit cross-section except circle-circle
What is your average speed? 8) Michael Phelps swam at average of 1.85 m/s for the first half of his race. What is the average speed of the second half of the race if he tied the record which was at an average of 2.05 m/s 9) A horse canters away from its trainer in a straight line, moving 116 m away in 14.0 s. It then turns abruptly and gallops halfway back in 4.8 s. Calculate (a) its average speed and (b) its average velocity for the entire trip, using “away from the trainers” as the positive direction. 10) A bowling ball traveling with constant speed hits the pins at the end of a bowling lane 16.5 m long. The bowler hears the sound of the ball hitting the pins 2.50 s after the ball is released from his hands.
Measure the weight on the ruler and record it in the data table 7. Put the third mass in the spring and wait until it stops bouncing 8. Measure the weight on the ruler and record it in the data table 9. Repeat the measurement two to three time to get accuracy on the readings. Recording Raw Data: Mass/g (+/- 0.1) | (+/- 0.1) cm/1 | (+/- 0.1) cm/2 | (+/- 0.1) cm /3 | Average cm | 0 | 0 | 0 | 0 | 0 | 49.9 | 1.3 | 1.5 | 1.2 | 0.15 | 99.7 | 5 | 4.8 | 4.4 | 0.30 | 199.9 | 13.5 | 13.7 | 13.2 | 0.25 | 499.2 | 38.7 | 38.5 | 38.9 | 0.20 | Processed Raw Data: Force/newton’s | Average extension m | Error bar (+/-
Once done we then did the same thing but going counterclockwise. This gave us the Angles of Reflection. FromThe two Angles of Reflection we were able to calculate the average Angles of Reflection, listed in Table 1. For the Law of Refraction, we replaced the mirror with a Acrylic cylindrical lens. We rotated the ray table clockwise by increments of 10̊ again.
In this experiment we studied the motion of a vibrating spring. For the first part of the experiment we hooked a 50 g mass holder to the spring and recorded the total mass on the spring as the reference point 〖 M〗_0. The reference or equilibrium position, x_0, of the spring was then observed and measured to be 21.2 cm. The mass load was then increased by 10 g until the total mass load was 110g. I found that as the mass load was increased the displacement from the reference position increased.