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) ...
Concept: Efficiency (η) = (Output power)/(Input power) Energy = (Power) (Time) Calculation: Output power = (Input power) (Efficiency) = 2 x 0.8 Outpu
Recent data from the Department of Energy indicates that average household consumption in watts hasn’t changed much since 2020.According to the EIA,“In 2022, the average annual amount of electricity sold to (purchased by) a U.S. residential electric-utility customer was 10,791 kilowatt-hours...
Schock, R.NBrown, M.LFulkerson, WMartin, R.L. San
百度试题 结果1 题目Unit for messuring how much energy the food can give us.其中energy 是“能量”的意思. 相关知识点: 试题来源: 解析 股messuring多少能量的食物能给我们.反馈 收藏
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)...
5. How much energy is required to melt 47.2kg of ice? Quote your answer to 2 decimal places and in Joules - but don't include the actual units in your submitted answer! 把47.2千克的冰融化需要多少能量? 单位用克 保留小数点后2位有效数字 但是回答总体问题的时候不需要单位. ...
How much heat energy is in a small calorie 正确答案 点击免费查看答案 试题上传试题纠错TAGS关键词试题汇总大全本题目来自[12题库]本页地址:https://www.12tiku.com/newtiku/919881/40696849.html相关题目:What is the basic unit of heat in the Metric system 免费查看参考答案及解析 How much work ...
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 ...
If an appliance consumes 2 kilowatts of electricity in 5 hours, how much energy does it consume per hour? A. 0.4 kilowatts B. 2.5 kilowatts C. 10 kilowatts D. 5 kilowatts 相关知识点: 试题来源: 解析 A。用总能耗除以时间可得每小时能耗,2÷5=0.4 千瓦。