Posted by admin | Posted in Green Energy | Posted on 07-02-2010
Tags: electronics, energy, green, power, technology
some energy and power questions?
Whenever energy is transformed, some energy is converted to
a) nuclear energy
b) electrical energy
c) thermal energy
d) mechanical energy
Coal stores energy from the sun as
a) chemical energy
b) electromagnetic energy
c) mechanical energy
d) electrical energy
True and False questions
Kinetic energy is due to the position of the object.
Gravitational potential energy depends on weight and height.
Green plants convert the electromagnetic energy of the sun into mechanical energy.
A device that has three times the power of another can do the same amount of work in one third the time.
c
a
f
t
partially true for wind turbines and some other types, but net result is electrical energy
t
.
Portugal opens the world’s first wave power farm
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Smart Strip SCG3 Energy Saving Power Strip with Autoswitching Technology $21.00 This Smart Strip 7-outlet power strip The Smart Strip SCG3 provides a safe, uninterrupted power supply, auto-switches devices on and off to save energy, uses less than one watt of power when fully energized, offers an EMI/RFI filter and 15 AMP circuit breaker, and delivers 1225-joule and 48,000 AMP protection…. |
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Smart Strip LCG3 Energy Saving Surge Protector with Autoswitching Technology, 10-Outlet $27.00 With patented auto-switching technology that saves you money on electrical bills, the Smart Strip LCG3 Energy Saving Power Strip features 10 outlets that work in sync to efficiently power your electrical devices. This unique energy-saving power strip automatically switches devices on and off and uses less than one watt of power when fully energized. And with premium EMF/RFI filtering and 2225-joul… |
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Black & Decker EM100B Energy Saver Series Power Monitor $24.99 Includes Power Monitor – EM100B, Cordless In-home Display Unit, Weatherproof Electricity Meter Sensor, Alignment Guide & Instruction Manual… |
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iGo PM00011-0001 Green Power Smart Tower $40.99 The average home wastes 10% of their energy consumption through standby (vampire) power loss. The iGo PM000110001 Power Smart Tower Surge Protector helps to reduce wasted standby power by up to 85% with the integrated iGo Green® Technology. Automatically. Plug your devices into any of the 4-active green outlets (that rotate for all sizes of plugs) to begin reducing wasted energy…. |
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Belkin BG108000-04 Conserve Energy-Saving Surge Strip $33.92 Belkin Conserve energy-saving 8-Outlets Surge Suppressor BG108000-04 Surge Suppressors… |
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PowerCost Monitor TM $99.99 As unobtrusive as a small electric clock, the PowerCost MonitorTM is a powerful real-time direct feedback display device that measures home electricity usage. It tells at a glance, in real-time, how much electricity your home is using in dollars and cents and in kW. Domestic energy use studies have demonstrated that real-time feedback yields energy savings anywhere between 10 and 20 percent. The … |
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Duracell 813-0281-07 100 Watt DC to AC Pocket Power Inverter $24.95 The Duracell Pocket Inverter 100 is a popular member of the Duracell Power family of ultra-compact, lightweight and modern power inverters and chargers manufactured by Battery-Biz Inc. The Duracell Pocket Inverter 100 efficiently converts 12-volt DC current from a vehicle’s cigarette lighter or power port into safe, reliable standard 120-volt household AC electricity. This versatile inverter i… |