Energy Conversion and Conservation: Laws, Examples, and Calculations
Energy conversion and conservation
Energy Conversion Energy can be converted from one form to another. The process of changing energy from one form to another is energy conversion. Energy conversions are constantly taking place all around you, often without you noticing. Light bulbs convert electrical energy into thermal energy and electromagnetic energy. In some cases, energy is converted from one form into another in a series of steps. Friction between the match and the matchbox converts some of
Read MoreUnderstanding Sound, Magnetism, and Light: A Comprehensive Overview
Sound
1. Electromagnetic wave (light) vs. mechanical (sound)
Light does not require a medium, while sound does.
2. Types of Waves
Longitudinal, Transverse, Surface
3. Factors Affecting Sound Travel
Density, temperature, and particle quantity
4. How Sound is Processed by the Ear
Function of the outer ear, ear drum, and cochlea
5. Effects of Air Temperature on Sound Travel
Hotter air=faster sound travel, colder air=slower sound travel
6. Relationship Between Frequency and Wavelength
Inverse relationship
7. Loudness
Read MoreAnalysis of Percy Bysshe Shelley’s Ode to the West Wind
seyey belongs to te younger generation of englis romantic poets,te generation tat came to prominence wile wiyiam wordswort and samuel taylor coleridge.Opposition to britain’s monarxical government as a form of tyranny.Believing firmly in democracy and individual rigts,e supported movements to reform government.In 1819,england’s nobility feared tat working-class citizens—besieged by economic problems,including ig food prices—would imitate te rebels of te frenx revolution and attempt to overtrow
Read Morescience 10 physocs
Energy Energy forms can be transferred into an object or transformed into an object System anything under observation surrounding anything that’s not system. universe = system + surroundings
kinetic engergy Mechanical kinetic energy: energy of an object that is in motion Radiant energy: energy of electromagnetic waves from an energy source (UV, solar visible light, infrared)Thermal energy: energy of random motion of particles in a substance (heat) Sound energy: energy of vibrations of particles
food and nutrition
2. NUTRTIONAL NEEDS
We need food to obtain nutrients and to satisfy a rage of needs.
-Structural: we need proteins to help us grow and to maintain our bodies.
-Providing energy: we need carbohydrates and lipids in order to do sports or to move about.
-Regulatory: we need a range of minerals for our bodiesto function properly.
2.1. STRUCTURAL NEEDS
The most important structural nutrients are proteins, although certain lipids are also important, such as the ones that form cell membranes, as are certain
f
Q # 1. The potential is constant throughout a given region of space. Is the electric field zero or non zero in
this region? Explain.
Ans. The electric field intensity is described by the relation:
According to the relation, the electric field is negative gradient of electric potential. If the electric
potential is constant throughout given region of space, then change in electric potential , hence .
Q # 2. Suppose that you follow an electric field line due to a positive point charge. Do electric field