Why is once-through cooling bad? The use of once-through cooling systems causes severe environmental impacts, killing billions of fish, degrading aquatic ecosystems, and increasing the temperature of our rivers, lakes, and ocean waters. What are the different types of cooling towers? Types of Cooling Towers Mechanical draft cooling tower. Atmospheric cooling tower. Hybrid draft cooling […]
Which type of motion is most often measured by the use of a polar coordinate system?
Which type of motion is most often measured by the use of a polar coordinate system? The initial motivation for the introduction of the polar system was the study of circular and orbital motion. Polar coordinates are most appropriate in any context where the phenomenon being considered is inherently tied to direction and length from […]
Is a TV AC or DC?
Is a TV AC or DC? Batteries and electronic devices like TVs, computers and DVD players use DC electricity – once an AC current enters a device, it’s converted to DC. A typical battery supplies around 1.5 volts of DC. Which current is used in railways? alternating current Why do trains run on DC current? […]
Can you register a car in NJ with an out of state license?
Can an echocardiogram detect blocked arteries?
Can an echocardiogram detect blocked arteries? Your doctor might recommend a stress echocardiogram to check for coronary artery problems. However, an echocardiogram can’t provide information about any blockages in the heart’s arteries. What is normal echo report? The normal percentage of blood ejected from the heart is in the range of 50-70% depending on different […]
Why do elements have different emission spectra?
Why do elements have different emission spectra? As the energy levels have different values, each of the possible electron transitions within an atom will produce a photon with a different energy. As a result each produces photons with different energy and so the line spectra for different elements will be different. What do you mean […]
What are the different types of explosives and their characteristics?
What are the different types of explosives and their characteristics? Explosive, any substance or device that can be made to produce a volume of rapidly expanding gas in an extremely brief period. There are three fundamental types: mechanical, nuclear, and chemical. A mechanical explosive is one that depends on a physical reaction, such as overloading […]
Can we group elements based on their physical properties alone?
Can we group elements based on their physical properties alone? We cannot group metals and non-metals on the basis of their physical properties only because there are many exceptions both in metals and non-metals. For example, (ii) Metals have generally high melting points but gallium and caesium have very low melting points. Why do groups […]
How did Aristotle explain matter?
How did Aristotle explain matter? Aristotle famously contends that every physical object is a compound of matter and form. This doctrine has been dubbed “hylomorphism”, a portmanteau of the Greek words for matter (hulê) and form (eidos or morphê). What year did Aristotle discover about the atom? All matter is made of indivisible particles called […]
What must do before it begins the production process?
What must do before it begins the production process? The crop would need land, water, and people as well as money and technology to begin the process. These elements need to be collected before going forward or the composition would fail. What are the three main questions of economics addresses who should? Economists address these […]