Match the vocabulary word with its definition.

1. a prediction made or conclusion drawn from insight gained from an established principle or law

theory

2. an initial proposed explanation for a phenomenon

subjective

3. a statement that explains what something does under similar conditions and is broadly agreed upon by the science community.

deductive reasoning

4. real reasoning based on facts

quantitative

5. initial idea which is believed to be true

presupposition

6. generalized descriptions based on senses

qualitative

7. description based on numbers, mathematics, or measurements

objective

8. ideas resulting from the personal feelings, emotions, or bias

hypothesis

9. a generalized model that explains how something happens and is used to explain observations

law

plasma is the state of matter where the substance is ionized and has no definite shape or volume. the fact of being ionized makes the substance a good electrical conductor.

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.

answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5  m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.