What three processes occur in every heat engine? Explain the heating effect of electric current. What is the cause of the conductivity of an atmosphere? Explain the terms convection and conduction? Define what is a particle accelerator. What are the causes and effects of acid rain? What causes...
1. Principle of Convection Convection transfers heat through fluid (liquid or gas) movement. It occurs due to temperature differences within the fluid, with hotter, less - dense fluid rising and cooler, denser fluid sinking, forming a convection current. For instance, in a radiator - heated roo...
Mrs. Johnson's kid is trying to drink with a straw that runs through an airtight cork in the top of a bottle of water. Explain to her kid why he won't get any water. Mrs. Johnson's kid is trying to drink with a straw that runs through an airtight cork in the top of a bottle...
What we've done here is pass an electric current through empty space from one coil of wire to another. This is called electromagnetic induction because the current in the first coil causes (or "induces") a current in the second coil. We can make electrical energy pass more efficiently from...
Each one is treated as being a bodily measure of the scientist after which they are named, rather than describing/estimating the eponymous feature within the scientist's field of study. Interestingly, of the manyunits named for people, only one is actually a measurement of its namesake: the...
What do you understand by the free convection boundary layer and how does it affect heat transfer? An electrostatic field line is a continuous curve. That is, a field line cannot have sudden breaks. Why not? Mountain roads are curved and not straight up the slope, ...
Explain why an air conditioner must cycle on and off to keep the room cooled to a preset temp?Convection:Convection is one of the processes of heat transfer that happens in liquids and gasses. Here, the hot gasses expand and become less dense, and rises upwa...
Heat transfer can occur between two objects only when there is a temperature difference between the two objects. The flow of heat is from objects at a higher temperature region to a cooler region object. Transfer of heat can be through either con...
Explain how heat is transferred by the following mechanisms: a. Conduction b. Convection c. Radiation Describe how an understanding of the working of the Earth a system relates to our ability to predict how that system might respond to a large scale distu...
Why must you put an air conditioner in the window of a building, rather than in the middle of a room? Explain with physics based terms. What is the difference between the specific humidity and the relative humidity? Distinguish between humidity and relative humidity. ...