What is experimental research in education?
Experimental research is a method used by researchers through manipulating one variable and control the rest of the variables. The process, treatment and program in this type of research are also introduced and the conclusion is observed. The aim of experimental research is to predict phenomenons.
What is an experimental control example?
Experimental controls are used in scientific experiments to prevent factors other than those being studied from affecting the outcome. For example, suppose a researcher feeds an experimental artificial sweetener to thirty laboratory rats and observes that eight of them subsequently die of dehydration.
How do you identify an experimental group?
An experimental group is the group in an experiment that receives the variable being tested. One variable is tested at a time. The experimental group is compared to a control group, which does not receive the test variable. In this way, experimental groups are used to find answers in an experiment.
What are the three experimental variables?
There are three main variables: independent variable, dependent variable and controlled variables.
Is pressure independent or dependent variable?
Explanation: If you manipulated (changed) the pressure and measured the volume as a result, the pressure would be the independent variable and the volume would be the dependent variable because the volume was dependent on the pressure
Is pressure independent of temperature?
For example, temperature and specific volume are always independent. However, temperature and pressure are independent only for a single-phase system; for a multiphase system (such as a mixture of gas and liquid) this is not the case. (e.g., boiling point (temperature) depends on elevation (ambient pressure)).
What are the four variables used to describe gases?
In this activity, you will explore four variables that quantify gases—pressure (P), volume (V), temperature (T), and moles (n) of gas. These four variables can be related mathematically so that predictions about gas behavior can be made.
Is Pressure vs volume linear?
Volume and Pressure: Boyle’s Law. When a gas occupies a smaller volume, it exerts a higher pressure; when it occupies a larger volume, it exerts a lower pressure (assuming the amount of gas and the temperature do not change). Since P and V are inversely proportional, a graph of 1/P vs. V is linear.
Why is the relationship between pressure and volume not linear?
Because there is so much empty space between gas molecules, it is easy to see why a gas is so compressible. As pressure is applied to the pump, the same number of gas molecules are squeezed into a smaller volume. The dependence of volume on pressure is not linear
Which plot will give a straight line?
If all curves are hyperbolas the gas obeys Boyle’s law at the given temperatures. By plotting V versus 1/P (or P versus 1/V), we obtain a straight line with slope = const. Therefore, a gas is ideal when the plot of V versus 1/P (or P versus 1/V) yields a straight line.
What happens to the volume as pressure increases?
Boyle found that when the pressure of gas at a constant temperature is increased, the volume of the gas decreases. when the pressure of gas is decreased, the volume increases. So, at constant temperature, the answer to your answer is: the volume decreases in the same ratio as the ratio of pressure increases
