Use the report pages below to record your data. Answer questions A-G found on pages 46 and 47. Name: _________________________ Lab 2 Report Data: Data Table 1: Length Measurements | Object | Length (cm) | Length (mm) | Length (m) | CD or DVD | 12.1 cm | 121 mm | .121 m | Key | 5.1 cm | 51 mm | .051 m | Spoon | 16.1 cm | 161 mm | .161 m | Fork | 18.5 cm | 185 mm | .185 m | NOTE: The instructions indicate to measure the objects to “one degree of uncertainty.” The degree of uncertainty is a property of the instrument used. All three recorded values will have the same precision. On page 29 is the explanation of uncertainty.
The type of characteristic and how well it measures is determined. When it comes to validity, the VMI utilizes the construct-related validation. The validation support here requires a demonstration of what it claims to measure. Another statistic to be aware of is the standard error of measurement (SEM). This will report any margin of error within individual testing due to imperfect reliability.
The motion of these components can be described as d=vt for constant horizontal motion, and d=1/2at² + Vit. The initial velocity with no angle will be found first, and then will be used to find the distance at which we place the bin. Apparatus: You will need: -Projectile launcher -Plumb Bob -Metric Tape Measure -Carbon Paper -White Paper Setup: * Part I * Part II Part I: Determine Muzzle velocity 1. Firmly attach the Launcher Base to a table by using a C-clamp, with the “launch point” (marked on the side with a circle and a cross) hanging over the edge. Make sure the launch range is clear of any obstructions.
The projectile was launched three times and an average velocity was found. Part One: This part of the lab was to accurately predict how far the projectile launcher would launch the projectile when it is fired perfectly horizontally off a table. The distance from the ground to how high the ball would be fired from was measured. Then, the equations were used to solve for the time that it would take from the time the ball was being fired to when it hit the ground. Next, using the equations the total distance the ball would travel was found.
Purpose: When light travels through different mediums, it is being refracted. The purpose of this lab is to test Snell’s law of refraction. Hypothesis: The angles of refraction that I predicted from the angle of incidences by using Snell’s Law are below on the predicted angle Column. To obtain these values I used the index of refraction of crown glass because it is more likely close to the glass (plexiglass) that we are using. Angle of Incidence 0° 10° 20° 30° 40° 50° 60° Predicted angle of refraction 0 6.56° 13.0° 19.2° 25.02° 30.27° 34.74° Variables and Controls: Independent Variable: The angle of the light coming from the ray box or the angle of incidence Dependent Variable: The angle of refraction on the plexiglass.
Because the length of a pendulum L, and the square of the period of the pendulum T2 are directly proportional, we were able to determine g by calculating the slope of the T2 vs L graph. From our calculations, this value turned out to be 10.3m/s2, while the accepted value for the acceleration is 9.8m/s2. Percentage Difference = 10.3−9.8 9.8 = 5.10 % There are a few reasons for the small error in our estimation: 1. There was some uncertainty in measuring the length of the pendulum L.
However, if an object were shot out of a gun for example , in a horizontal direction , then the force of gravity would directly act upon the object on its descent . When an object is projected at a specific angle, then your v is no longer v. In other words your final velocity is not equal to your initial velocity . The equation v=v cos is used. Experiment overview: In this lab , my partner and I performed multiple attempts to calculate the average distance a projectile would travel before hitting the ground when shot out of a gun in a horizontal direction . In the first trial , we shot the circular metal ball out of the gun at an angle parallel to the ground(0).The gun , itself , had three levels of compression .
Objective The purpose of this experiment is to prove the laws of reflection and refraction, and to determine the angle of the total internal reflection and the index of refraction in the experiment. Theory The theory being experimented in this procedure is that of Willebrord Snell. From his theory we understand that the incident ray, the normal line and the refracted ray all lie on the same plane. We also understand that the relationship is defined in a ratio with the following equation; Which means that the ratio of the sine of the angle of incidence to the sine of the angle of refraction, I equal to the ratio of the speed of light in the original medium and the speed of light in the refracting medium. Procedure We set up the optics track, light source and the ray table.
Hence the formula h= ½ gt^2 can be used in order to help obtain an accurate estimation of the tables height from the ground. Purpose: The purpose of this experiment is to provide the materials to investigate the relationship between the horizontal speed of the marble and the total (Elapsed time) time. Through this experiment the relationship between the different
The explanation approach makes use of structural or epidemiological models of mortality considering causes of death for which the key exogenous variables are known and can be measured from available data (Janssen and Kunst, 2007). The expectation approach is the week approach in this context as it is based on the subjective opinions of experts involving varying degrees of formality. It should be noted that some mortality forecasting methods include aspects of one or more approaches (Stoeldraijer et al,