Is souring of milk a chemical change? The souring of milk is classified as a chemical change because it results in the production of sour-tasting lactic acid. Is Melting Point chemical or physical? physical and chemical properties. Examples of physical properties are: color, smell, freezing point, boiling point, melting point, infra-red spectrum, attraction (paramagnetic) or […]
Is symbiosis important to an ecosystem?
Is symbiosis important to an ecosystem? Symbiotic relationships are important because they are a major driving force of evolution. This networking and cooperation among species allows them to survive better than they would as individuals. How can symbiosis hurt the ecosystem stability? In symbiotic relationship such as mutualism and commensalism, both the organism survived and […]
How would you classify the change in matter when wood is burned?
How would you classify the change in matter when wood is burned? Burning of wood is a chemical change as new substances which cannot be changed back (e.g. carbon dioxide) are formed. For example, if wood is burned in a fireplace, there is not wood anymore but ash. Other examples include burning of a candle, […]
How do you stretch your thigh muscles?
What are the 5 sources of heat energy?
What are the 5 sources of heat energy? Here are only some of your many choices for heating energy sources: natural gas, propane (LP), oil, coal, wood, electricity, heat pumps, ground source heat pumps and solar energy. Why sound is important in our daily life? Everything we know is founded upon the human body’s ability […]
Is smoking once a month OK?
Is smoking once a month OK? A person who smokes one or two cigarettes a few times a month may be less likely to trigger a full-blown addiction to nicotine. However, they are playing with fire by introducing this highly addictive substance into their bodies. Will 1 cigarette a week harm you? Simon Chapman, Emeritus […]
Which of the following is paramagnetic N2?
Which of the following is paramagnetic N2? The electronic configuration of boron has been shown which tells us that it is paramagnetic. Same applies to nitrous oxide. Is N2+ more stable than N2? Bond order of both N2+ and N2- is 2.5, but according the molecular orbital theory, N2- has more antibonding electrons than N2+. […]
What are the 4 types of thermodynamic processes?
What are the 4 types of thermodynamic processes? The four types of thermodynamic process are isobaric, isochoric, isothermal and adiabatic. What is an example of thermodynamic process? In this process energy may be transferred form or into the system and also work can be done by or on the system. One example of a thermodynamic […]
Which force helps swimmers float in water?
Which force helps swimmers float in water? Buoyancy Why is it better for a swimmer to be higher in the water? Wave resistance will be reduced proportionally by any amount of water that can go over the top of the swimmer. This is the reason why swimmers progress better underwater (at approximately a depth of […]
When can the addition of two vectors be zero?
When can the addition of two vectors be zero? Yes, two vectors of equal magnitude that are pointing in opposite directions will sum to zero. Two vectors of unequal magnitude can never sum to zero. If they point along the same line, since their magnitudes are different, the sum will not be zero. What does […]