Physics Test Notes
Society has become increasingly dependent on electricity over the last 200 years
Random Keywords:
Independent Variable: variable that is changed
Dependent Variable: thing that changes with independent variable, it is what you measure
Control Variables: variable held constant for reference
Validity or valid: the extent to which a measurement accurately reflects the concept, which is intended to measure
Accuracy: how close your measurement or results are to the true value
Reliability: the extent to which a measurement yields consistent stable and uniform results over repeated observations or measurements.
Domestic energy and how it has changed * The first sources of electrical energy were batteries, which provided low voltage DC power.
* Electromagnetism was discovered in the 19th century, which ultimately leads to the ability to generate electricity, and also to be able to distribute it over wide areas. Thomas Edison in New York in opened the first public electricity utility 1882-marking the first time that electricity was available for domestic and industrial use.
Impacts of the changes in sources of energy
* The use of coal has had a particularly large impact on our society * Coal could burn hot fires which made steel * Steel was one of the factors that lead to the industrial revolution * Coal lead to the development of the steam engine * Pollution and global warming was created
The production of electricity
* In 1831, Michael Faraday discovered electromagnetic induction, which lead to the development of the electrical generator * The generator consists of a rotating coil or wire in a magnetic field * Most power stations burn fuel to obtain this energy. * Nuclear Power stations, hydroelectric power station, wind power, tidal energy are used to save non renewable energy.
Electrostatics * Electrostatic is the study of bodies with stationary electrical charges
Materials that
Random Keywords:
Independent Variable: variable that is changed
Dependent Variable: thing that changes with independent variable, it is what you measure
Control Variables: variable held constant for reference
Validity or valid: the extent to which a measurement accurately reflects the concept, which is intended to measure
Accuracy: how close your measurement or results are to the true value
Reliability: the extent to which a measurement yields consistent stable and uniform results over repeated observations or measurements.
Domestic energy and how it has changed * The first sources of electrical energy were batteries, which provided low voltage DC power.
* Electromagnetism was discovered in the 19th century, which ultimately leads to the ability to generate electricity, and also to be able to distribute it over wide areas. Thomas Edison in New York in opened the first public electricity utility 1882-marking the first time that electricity was available for domestic and industrial use.
Impacts of the changes in sources of energy
* The use of coal has had a particularly large impact on our society * Coal could burn hot fires which made steel * Steel was one of the factors that lead to the industrial revolution * Coal lead to the development of the steam engine * Pollution and global warming was created
The production of electricity
* In 1831, Michael Faraday discovered electromagnetic induction, which lead to the development of the electrical generator * The generator consists of a rotating coil or wire in a magnetic field * Most power stations burn fuel to obtain this energy. * Nuclear Power stations, hydroelectric power station, wind power, tidal energy are used to save non renewable energy.
Electrostatics * Electrostatic is the study of bodies with stationary electrical charges
Materials that