Category: Physics

Should I unplug appliances when not in use? The energy costs of plugged-in appliances can really add up, and unplugging these devices could save your up to $100 to $200 a year. Another benefit of unplugging your appliances is protection from power surges. Should I unplug microwave when not in use? People typically remember to […]

What are limiting factors for humans? Limiting factors are resources or other factors in the environment that can lower the population growth rate. Limiting factors include a low food supply and lack of space. Limiting factors can lower birth rates, increase death rates, or lead to emigration. What are three limiting factors for human population? […]

How do you light a film? Here’s how to do it: Place your main and strongest source of light, called a key light, off to one side of the actor to create a slight shadow on the opposite side of their face. Add a second light, called a fill light, on the opposite side of […]

How do I get rid of reactive power? Inductive reactive power can be reduced by applying a capacitor bank. With an active dynamic filter, all types of reactive power can be reduced and the derating of the transformer or generator is limited. What exactly is reactive power? Reactive Power can best be described as the […]

Which of the following is an assumption of the molecular clock? The “molecular clock” method assumes that changes in DNA accumulate at approximately constant rates over time. One explanation is that species might undergo genetic changes long before those changes are reflected in the body plan. What does the molecular clock used to determine how […]

What group is the smallest level of classification? Species is the smallest and least inclusive of the taxonomic categories. Kingdom, Phylum, Class, Order, Family, Genus, Species. Which is not a category? Phylum, Species, and Class are taxonomic category. But, Glumaceae is not a category. It is a botanical name assigned to order including the family […]

Which nerve carry messages from ear to brain? The cochlear nerve, also known as the acoustic nerve, is the sensory nerve that transfers auditory information from the cochlea (auditory area of the inner ear) to the brain. How do you fix auditory nerve damage? Once damaged, your auditory nerve and cilia cannot be repaired. But, […]

What is difference between current and drift velocity? Current is the flow of free charges, such as electrons and ions. Drift velocity vd is the average speed at which these charges move. What is the relation between drift velocity and area? Current IenA=v where v is drift velocity , e is the charge of an […]

How do you change the concentration of a solution? The concentration of a solution can be changed: concentration can be increased by dissolving more solute in a given volume of solution – this increases the mass of the solute. concentration can be increased by allowing some of the solvent to evaporate – this decreases the […]

What are the three main resources needed for basic human development? The significance of food, water and energy to economic and social well-being. There are natural resources that are essential to human survival, these being food and water, but if we add energy to that list we have the resources that are fundamental to human […]