Why are heating fluids less dense? When a liquid or gas is heated, the molecules move faster, bump into each other, and spread apart. Because the molecules are spread apart, they take up more space. They are less dense. The molecules move more slowly and take up less space. Can water’s density change? The density […]
Why are triathletes so muscular?
Why are triathletes so muscular? Realize that physique is primarily a consequence of genetics, not training. Triathletes have more muscle mass than runners because running selects atheltes with low muscle mass. Swimming itself does not add muscle mass. Do push-ups build muscular strength? Traditional pushups are beneficial for building upper body strength. They work the […]
Is dementia hereditary yes or no?
Is dementia hereditary yes or no? Many people affected by dementia are concerned that they may inherit or pass on dementia. The majority of dementia is not inherited by children and grandchildren. In rarer types of dementia there may be a strong genetic link, but these are only a tiny proportion of overall cases of […]
What happens when light is absorbed by an object?
What happens when light is absorbed by an object? The light wave could be absorbed by the object, in which case its energy is converted to heat. The light wave could be reflected by the object. And the light wave could be transmitted by the object. When this occurs, objects have a tendency to selectively […]
What do you mean by a potential difference?
What do you mean by a potential difference? Potential difference is the difference in the amount of energy that charge carriers have between two points in a circuit. A potential difference of one Volt is equal to one Joule of energy being used by one Coulomb of charge when it flows between two points in […]
What are the 6 sources of electricity?
What are the 6 sources of electricity? Different Sources of Energy Solar Energy. The primary source of energy is the sun. Wind Energy. Wind power is becoming more and more common. Geothermal Energy. Source: Canva. Hydrogen Energy. Tidal Energy. Wave Energy. Hydroelectric Energy. Biomass Energy. What is a source of electricity called? Source of electricity […]
What are control variables examples?
What are control variables examples? Examples of Controlled Variables Temperature is a common type of controlled variable. If a temperature is held constant during an experiment, it is controlled. Other examples of controlled variables could be an amount of light, using the same type of glassware, constant humidity, or duration of an experiment. How do […]
What is the difference between floating and sinking?
How did the pioneers solve their problems?
How did the pioneers solve their problems? However, because of the freed land and rich wildlife and soil, the pioneers were willing to overcome the challenges. Because of no trees or stone to build with, pioneers had to rely on prairie sod. Farmer’s in the 1800s used mules, oxen or horses, and special plows to […]
Where do we use convex mirrors?
Where do we use convex mirrors? These convex mirrors are used for cars because they give an upright image and provide a wider field of view as they are curved outwards. Convex mirrors are also often found in the hallway of various buildings including hospitals, hotels, schools, stores and apartment building. What is the concave […]