1) How much energy is needed in lifting 5 m3 of water to a height of 20 m and projecting it horizontally at a speed of 10 m/s?What must be the power of an engine capable of performing this amount of work in 12.3s?(Take g = 9.81 m/s2 and density of water = 1000 kg/m3) ...
As housing is a basic need for people, government should provide free housing for everyone who cannot afford it. To what extent do you agree or disagree? Give reasons for your answer and include any relevant examples from your own knowledge or experience. Write at least 250 words. Task 2 ...
According to theDCCEEW, “A single offshore wind turbine can provide up to 66 gigawatt hours of energy per year, enough to power 10,000 Australian households.” Small Wind Energy Systems There are small wind turbines marketed for residential use, but most homeowners choosesolar panelsystems to...
When wind passes through turbines, the ones at the front, or upstream, extract some energy from the wind. As a result, the wind slows down and becomes more turbulent behind the turbines. This means the turbines downstream get slower wind, sometimes resulting in lower power generation. The wak...
1) How much energy is needed in lifting 5 m3 of water to a height of 20 m and projecting it horizontally at a speed of 10 m/s?What must be the power of an engine capable of performing this amount of work in 12.3s?(Take g = 9.81 m/s2 and density of water = 1000 kg/m3)2)...
有这样一句话:“How much solar energy will the solar panels transform into electrical energy if the efficiency is 90%?” 想问这句话到底是要求什么,是太阳能还是电能‥我个人觉得是太阳能吧…假如是电能的话, 相关知识点: 试题来源: 解析 求的是solar energy ...
We do not often consider how much energy goes into creating comforts like hot showers and cold beer. A more efficient refrigerator will give us the same cold beer while using less energy. A more water-efficient showerhead will give us the same hot shower while using less water: less water...
How Much Energy Does 1 Solar Panel Produce in a Day? The rated power of a solar panel in watts represents the maximum level of electricity generation potential as determined in a laboratory under Standard Test Conditions. STCs only exist in a lab and provide specifications based on ideal condi...
2.Energy always increases in cold weather, but many are unaware of just how much oil and gas they every day. (consume 相关知识点: 试题来源: 解析 【答案】consumption;consumers;consume【核心短语/词汇】increase 增加【翻译】在寒冷的天气里,能源消耗总是增加,但是许多消费者并没有意识到他们每天消耗...
Concept: Efficiency (η) = (Output power)/(Input power) Energy = (Power) (Time) Calculation: Output power = (Input power) (Efficiency) = 2 x 0.8 Outpu