What is independent variable in research PDF?
Independent Variables are defined as a characteristic that we (ones who are conducting the experiment) manipulate to identify a particular factor. Independent variables are also known as factor or prediction variable. Only the researchers who are conducting the experiment are allowed to control and change it.
How do you tell the difference between independent and dependent variables?
The independent variable is the one the experimenter controls. The dependent variable is the variable that changes in response to the independent variable. The two variables may be related by cause and effect. If the independent variable changes, then the dependent variable is affected.
Is pressure an independent 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.
What is the independent variable in Boyle’s law experiment?
What happens to the volume as the pressure decreases? Plot your results as a graph of pressure versus volume (in other words plot pressure on the x-axis and volume on the y-axis). Pressure is the independent variable, which we are changing to see what happens to volume.
Is blood pressure a dependent or independent variable?
The independent variable in the study is the type of pill the patient is given (placebo or Brackenolol). The experimenter determines whether a patient receives the placebo or Brackenolol. Thus, the dependent variable in the study is the measure of blood pressure.
What is the dependent variable in Boyle’s law experiment?
BOYLE’S LAW. – he wanted to investigate the relationship between pressure and volume. ▪ independent variable = pressure. ▪ dependent variable = volume. ▪ controlled variables = temperature and number of moles (no gas enters.
Is pressure dependent on volume?
The state of a gas is defined by various properties which we can observe with our senses, including the gas pressure (p), temperature (T), mass (number of moles – m), and volume (V) which contains the gas. The value of pressure and temperature does not depend on the amount of gas used in the measurement.
What is the dependent variable in Charles Law?
Charles’s law states that for a gas at constant pressure, volume in directly proportional to temperature. The volume of a mass of gas is dependent on the temperature and pressure. Therefore, these conditions must be given along with the volume of a gas.
Is pressure dependent on temperature?
Pressure, Volume, Temperature, Moles The force exerted by the particles per unit of area on the container is the pressure, so as the temperature increases the pressure must also increase. Pressure is proportional to temperature, if the number of particles and the volume of the container are constant.
Why is temperature and pressure directly proportional?
Gay Lussac’s Law – states that the pressure of a given amount of gas held at constant volume is directly proportional to the Kelvin temperature. If you heat a gas you give the molecules more energy so they move faster. This means more impacts on the walls of the container and an increase in the pressure.
Why is pressure equal in all directions?
Pressure at any point below the upper boundary of fluids, such as air and water, is uniform in all directions due to the fluid molecules being in constant motion and continually bumping into one another.
Why is volume and temperature directly proportional?
So, that means that volume is directly proportional to temperature. Even then, since we increase the temperature inside a material, the molecules’ kinetic energy increases and they start to vibrate more and move around further from each other, therefore accounting for an increase in volume.
Is volume and temperature directly proportional?
The volume of a given gas sample is directly proportional to its absolute temperature at constant pressure (Charles’s law). The volume of a given amount of gas is inversely proportional to its pressure when temperature is held constant (Boyle’s law).
How is volume and temperature related?
Charles’s law states that the volume of a given amount of gas is directly proportional to its temperature on the kelvin scale when the pressure is held constant.
How does temperature affect gas volume?
This law states that the volume and temperature of a gas have a direct relationship: As temperature increases, volume increases, when pressure is held constant. Heating a gas increases the kinetic energy of the particles, causing the gas to expand.
Does a gas have a definite shape and volume?
Three states of matter exist – solid, liquid, and gas. Solids have a definite shape and volume. Liquids have a definite volume, but take the shape of the container. Gases have no definite shape or volume.
What happens to volume and pressure when temperature increases?
when the pressure of a gas at constant temperature is increased, the volume of the gas decreases. when the pressure is decreased, the volume increases. the volume of a gas is directly proportional to its temperature(in kelvin) at constant pressure.
What are the 3 gas laws?
The gas laws consist of three primary laws: Charles’ Law, Boyle’s Law and Avogadro’s Law (all of which will later combine into the General Gas Equation and Ideal Gas Law).