Why is it called the water cycle? The water cycle is called the hydrologic cycle. In the hydrologic cycle, water from oceans, lakes, swamps, rivers, plants, and even you, can turn into water vapor. Water vapor condenses into millions of tiny droplets that form clouds. Clouds lose their water as rain or snow, which is […]
Do real gases have attractive forces?
Do real gases have attractive forces? Real gas interactions, such as attractive and repulsive intermolecular forces, are more complex than perfectly elastic collisions; the significance of these contributions varies with the gases’ conditions. Do real gas molecules interact with each other? All gas particles are in constant motion and collisions between the gas molecules and […]
What is the law of momentum?
What is the law of momentum? One of the most powerful laws in physics is the law of momentum conservation. For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after […]
What different species can interbreed?
What different species can interbreed? According to the most widely used species definition, the biological species concept, a species is a group of organisms that can potentially interbreed, or mate, with one another to produce viable, fertile offspring. In this definition, members of the same species must have the potential to interbreed. Can a horse […]
What are examples of steam engines?
What are examples of steam engines? In general usage, the term steam engine can refer to either complete steam plants (including boilers etc.) such as railway steam locomotives and portable engines, or may refer to the piston or turbine machinery alone, as in the beam engine and stationary steam engine. What is the contribution of […]
What is the first thing you should do before beginning a lab activity?
What are the ideas of Aristotle about motion?
What are the ideas of Aristotle about motion? Summary: Basically, Aristotle’s view of motion is “it requires a force to make an object move in an unnatural” manner – or, more simply, “motion requires force” . After all, if you push a book, it moves. When you stop pushing, the book stops moving. What is […]
Is the North Star dying?
Is the North Star dying? The North Star, a celestial beacon to navigators for centuries, may be slowly shrinking, according to a new analysis of more than 160 years of observations. The data suggest that the familiar fixture in the northern sky is shedding an Earth’s mass worth of gas each year. Why hasn’t the […]
Which example would most likely decrease friction?
Which example would most likely decrease friction? using cleats, rather than gym shoes, on a field using shaving cream, rather than shaving on dry skin using a wide parachute, rather than a narrow parachute, when skydiving using sandpaper, rather than regular paper, on wood. Why does a skydiver reach terminal velocity? As the skydiver gains […]
What is the sum of an expression?
What is the sum of an expression? The “sum” is the answer to an addition of values. An expression is a maths sentence which conveys information. Note that no answer is given, so we cannot write and equation, only an expression stating that the two given values are being added together. What is the product […]