1. Introduction
When we say equilibrium, it is a state of balance. It is a condition where there is no change in the state of motion of a body. Equilibrium also may be at rest or moving within a constant velocity. A simple mechanical body is said to be in equilibrium if no part of it is accelerating, unless it is disturbed by an outside force. Two conditions for equilibrium are that the net force acting on the object is zero, and the net torque acting on the object is zero. Thus, the following objectives were emphasized in this experiment: to determine the equilibrant force using the force table and the component method, to determine the unknown forces using the first condition and second conditions for equilibrium, to locate the centre of
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Percent error was computed after.
For activity 3, the group used a circle of diameter 10cm and a square of side 10 cm from the card board. The circle and the square was weighed and recorded as Wc and Ws. The group determined the center of gravity of the composite figure by using the balancing method and composite method. In balancing method, a pen was placed in the middle of the composite figure wherein the plumb method, the group used a string with a coin at the end then hung it from any point and measured where it intersects on the composite figure. Figure 2: Balancing Method Figure 3: Plumbing Method
For activity 4, the group first located the center of gravity of the aluminum bar by balancing it on a pencil. The cylinder used in activity 2 was hung 5.0 cm from one end of the bar. Using the force board, the aluminum bar was supported by means of a spring scale on the end and a string on the other end until the bar assumes a horizontal position. The group used the second condition for equilibrium to determine the weight of the bar and the tension in the string. Percent error was also computed. Figure 4: Set-up for Activity 4
4. Results and Discussion
Activity 1
Tensions Magnitude (N) Position(°)
TA 1.3105 30°
TB 1.7962 200°
Experimental Equilibrant 0.6241 360°
Theoretical Equilibrant 0.5545 356°
% Error 13%
Table 1: Results of Activity 1
Table 1 shows the magnitude and the positions of the equilibrants and the tensions acting on the pans.
The
The purpose of this lab is to test substances and to determine the physical and chemical properties of substances.
Aim: The aim of the lab “Chemical Equilibrium” is to observe the effects of changes in concentrations of products and reactants on the position of the equilibrium of given chemical reactions.
The objective of the experiment is to apply Le Chatelier's Principle, which is a system that responds to an external stress and then adjusts itself in order to alleviate the stress when it is at equilibrium. A reactant is added, and the equilibrium is reestablished, resulting in more products and fewer reactants, and thus, the position of equilibrium is shifted to the right. When a product is added, the equilibrium position is shifted to the left because there are more reactants and fewer products.
The objective of this lab was to explore the behavior of centripetal acceleration and identify the relationships between the acceleration and several forces acting on the object.
Using Gravitational Force as a Measurement Tool Answer the following questions about the results of this activity. Record your answers in the boxes. Send your completed lab report to your instructor. Dont forget to save your lab report to your computer Activity 1 Record your data from Activity 1 in the boxes below. Enter the data for the sample you used in each trial (5000 rpm, 10000 rpm, etc) in the appropriate columns and the corresponding g-force, number of layers, and position of layers position results. You will need to use the following formula to assist with your laboratory report G-force 0 00001118 x radius of centrifuge arm x (rpm)2 The radius of the centrifuge arm for this instrument is 10 cm. Speed 5000 rpm 10000 rpm 15000 rpm
Students will carefully observe acts of aggression and prosocial behavior on television, report their observations, and analyze their data to draw conclusions.
1) Since the [OH⁻] would double, half the required number of drops would be needed.
First, we will set up the force table. The table comes in three separate pieces the base, stand and table once we connect and fasten all three parts we must use a circular level to make sure the table is balanced. If the force table isn’t balanced then we must adjust the base’s feet to the appropriate levels on each leg till the bubble on the level is centered. We must then assign where the positive & negative x, y axis are on the force table as a point of reference and label them with tape .Then for part I we must apply 1.96 N in the positive x – direction, and 2.94 N in the positive y-direction then we must balance the two with a third force and record the magnitude and direction of it and a draw a diagram showing all three forces. Part II
2. Lift the spring scale just until the mass is hanging from the scale. Now slowly
C. An unknown, rectangular substance measures 3.6 cm high, 4.21 cm long, and 1.17 cm wide.
Seven various household objects were chosen to measure using a digital gram scale. Each object’s mass was estimated by lab students and recorded in data table 4. A quarter, ball point pen, rubber bulb, large paper clip, green crayon, house key and a copper penny masses were estimated and recorded in data table 4. Each object was placed on the scale individually and its actual measurement was recorded in data table 4. As we started estimating the household objects we were often not correct in our estimations. As we measured more and more objects, we got better in our estimations by comparing objects with known masses and comparing them with the unknown
The forces that are involve with the experiments are basically focused on the concurrent forces. The experiment also allows us to develop the condition of balancing or arranging the angles both sides on a force table. This laboratory experiment allows us to take the mathematical abstraction of a vector to make it tangible as possible. This experiment will look into two ways of
Below are two tables in which I have recorded the data which I obtained during the experiment. The first table reflects the Relationship between the deflection/flexion of the cantilever and the mass of the load and the second table reflects the relationship between the flexion of the cantilever and the length of the cantilever.
Table 1 & 2: First, find the mass of the wooden block and record the data. Then place the wooden block on the inclined plane (at 0o) with the wide side down. The height of the pulley should be the same height as the screw location on the wooden block. Then hang a weight on the opposite side of the hanger and add weights until block starts to move with a constant velocity (push block to overcome fs¬). Then record the resulted weight of the hanger in Table 1 (as F). Add 500 g to the wooden block and repeat the process. Replace 500 g with 1 kg on the wooden block. Repeat the process described above.
The apparatus shown in Figure 1 will be used. It consists of a quarter circle block attached to a cantilevered arm with a rectangular surface on the other end. The pivot point on the arm corresponds to the center of radius of the block. With no water in the tank, and no weights on the scale, the arm is horizontal. As weights are added one by one to the scales, water can be added to the tank so that the hydrostatic force balances the weights and bring the arm back to horizontal.