Stopwatch Reports Samples For Students

Abstract

The main aim of performing this experiment was to study the behaviour of the voltage across a capacitor as it charge and discharge through a known resistor. From the experiment, it was seen that charge/ discharge of a capacitor follows an exponential function. We also studied about the time constant RC of the circuit.

Introduction

We carried out a lab experiment on an RC circuit recorded and calculated the results so as to determine the time constant. We found out that as capacitance decreases, time constant also decreases and increase in resistance lead to increase in time constant

Objective

Investigating the behaviour of a charged capacitor ...

TORSION LABORATORY

Objective
The objective of this experiment was to determine the relationship between load and angular deflection of a mild steel bar, the maximum shear stress applied to the bar and its modulus of rigidity.

Apparatus

- Torsion test rig
- Weight hangers
- Masses
- Rule
- Calipers

Procedure

- A distance L was set between two angle indicators. Then the fixings were tightened to make sure that it was not moving. The indicators were set to zero on both the scales.
- The effective radius of the pulley and the diameter of the steel shaft ...

Introduction

The experiment was conducted to examine the validity of Bernoulli’s Principle as applied to the flow of water in a tapering circular duct. It employed the use of Bernoulli’s Theorem Demonstration Apparatus, hydraulics bench and a stopwatch to gather relevant data. The volume of water was measured and its flow was timed using the stopwatch. The two values were used to calculate the flow rate of the fluid. Additionally, the manometer readings were collected and used to compute the velocity of the fluid at each tapping position. The values were used to calculate the theoretical velocity head ...

Investigating How Temperature Affects The Breathing Rate Of Goldfish

IntroductionAim
The aim of this experiment is to find out whether varying temperature of the surrounding environment of a goldfish would affect its breathing rate. Research question
Does the breathing rate of goldfish change with changes of the surrounding temperature? If it does, how does it? Would increasing the temperature of water containing a goldfish lead to high breathing rates or vice versa? A beaker containing aquarium water will be used as the environment in which a goldfish will be placed. The temperature of the water in the beaker will be altered successively by serially adding crushed ice to obtain ...

Abstract

Chunking, the technique of grouping similar concepts together in order to aid memory, has long been associated with better working memory performance. The purpose of this research was to investigate the effects of chunking on the memorization of words. A total of 18 participants were given a list of 18 words to remember, with nine of these being informed about the technique of chunking before attempting the memory task. The results of an independent samples t-test show that chunking has a significant (p=0.05) effect on the word memorization skills of the participants (t=8.390). This supports previous research that suggests ...

Introduction

The kinetic characteristics are important for the design of chemical engineering processes. They allow assessing the time required for the reaction and choosing the temperature range suitable for the reaction.
The reaction path is observed by measurments the transmittance of the Crystal Violet solution that reacts with sodium hydroxide. The concentration, and the color of the solution changes with the reaction flow, and this is measured by the spectrophotometer.

The data are plotted as concentration - time and logarithm concentration time, and the reaction rate is:

Rate = [Crystal Violet] [Sodium Hydroxide].
Using the excess concentration of one of the reagents, the reaction rate with respect to the other reagent is found from logarithmic plot (Rahul & Chakrabarti ...

Objective

In this experiment, we examined the motion of a simple pendulum constructed from a bob hanging from a long, thin string attached to the ceiling. We wish to confirm that the period of the pendulum depends not on the mass of the bob, but only on the length of the string and the acceleration due to gravity. We also wish to obtain an experimental value for earth's gravitational constant, g, which is known to be 980.35 cm/s2.

Discussion

Two approaches were used to make an experimental determination of the value of g. The first approach involved measuring a single period 100 times, using a stopwatch. ...

Experiment 13

Simple Harmonic Motion
Introduction
The purpose for this experiment was to measure spring’s constant of a spring. In part 1, extension of the spring when a mass is hanged on it was measured. Six measurements for the extension were obtained for each mass used. All the measurements were used to determine the spring’s constant by plotting a graph of weight against extension. In part 2, six measurements of period were taken using different masses (same masses used in part 1). The measurements were then used to plot a graph of square of periods against mass. The equation of the ...

Descriptive Title

In a human body, exercises significantly affect the heart rate. When exercising by climbing and descending in a staircase, the heart rate seems to change, and breathing is affected. This experiment is used to make an analysis on the ups and downs on the staircase.

Introduction

Aerobic exercise that includes the ups and down on the staircase, is an extended activity-involving key group of muscles and increased heart and respiratory rate. Stair case climbing involves some muscles such as the calf muscles and Quadriceps in the legs. It is an exercise that requires few materials and hence becomes the best heart rate ...