問題一覧
1
capacity of doing work
energy
2
unit of energy
joule
3
measured watt rate time
power
4
unit of power
watts
5
commonly used type of energy source
conventional sources
6
list the conventional sources
coal , oil , gas , hydro , nuclear , firewood
7
list the non conventional sources
solar , wind , tidal , geothermal
8
formed in nature by dead plants what under pressure and temperature for million of years
coal
9
highest grade of ignitable coal
anthracite
10
hard , black , glossy type of coal
anthracite
11
type of coil that is dense , black and most available
bituminous
12
type of coal that is brownish black , low quality and used in power plants
lignite
13
a type of coal that is brownish in color and very low grade , it burns like wood
peat
14
formed when large quantities of dead animals buried under rocks , seabed, or earth core for years
oil
15
what are the most oil produced countries(3)
saudi arabia , iran , canada
16
available deep inside the earth
gas
17
it is rich in hydrocarbon mainly methane
gas
18
used as fuel in power plants, automobile and domestic purpose
gas
19
is stored and used for power generation after passing over the turbine
hydro
20
what country is currently producing maximum hydro energy
china
21
it is a highly radioactive material composed of uranium 235
nuclear
22
alar cells are manufactured from the second most abundant element in the earth's crust, what is this element
silicon
23
which of the energy in burning coal reaches the consumer as electricity
1/3
24
type of fossil fuel is mined from the ground
coal
25
fossil fuels are considered nonrenewable sources because of _______
how long they are formed
26
what method of generating electricity does not use alternative energy resource
burning coal in a power plant
27
when large nucleus is split into two smaller nuclei, the process is nuclear ______
fission
28
what is the unit of force
newton
29
unit of work
joule
30
work is defined as
force over distance
31
power is defined as
work per unit time
32
the amount of something that may become available for use
resources
33
energy sources derived from natural organic materials are called _____
fossil fuels
34
whatis the first law of thermodynamics
conservation of energy there explains that the energy can change forms but it is neither be created or destroyed
35
gasoline is produced by refining which fossil fuel
petroleum
36
other than being fuel for combustion, what are the other use for natural gas
fertilizer
37
the entropy low is ______
second law of thermodynamics
38
what year did the electricity reach the country
1890
39
when was meralco established
1903
40
when was national power corporation established
1936
41
in a pn junction, the n-side is a bite more ____ than the p-side
positively charged
42
in a pn junction, the p-side is a bite more ____ than the n-side
negatively charged
43
p-side has an excess of _____
holes
44
n-side has an excess of ________.
electrons