根据第二段第一句“Once,he heard a friend say that something black in colour absorbs the heat better than something white in colour.(有一次,他听到一位朋友说,颜色较深的东西比颜色较浅的东西更能吸收热量。)”可知,是一个朋友告诉他的,所以答案为A friend。3.【答案】It was winter.【解析】:题干...
If {eq}He {/eq} gas has an average kinetic energy of {eq}7050\;J/mol {/eq} under certain conditions, what is the root mean square speed of {eq}O_{2} {/eq} gas molecules under the same conditions? ...
Answer to: How do you find the number of moles of a gas if the pressure is 1.00 atm, the volume is 800 L, the temperature is 325 K, and KE = 4.05...
Answer to: A sample of 0.25 moles of an ideal gas expands from 72 milliliters to 10 liters. If the gas expands adiabatically and reversibly,...
A. heat, gas, and flames B. fuel, heat, and oxygen C. heat, nitrogen, and fuel D. fuel oil, nitrogen, and oxygen 查看完整题目与答案 放映室装有60瓦照明灯5盏,倒片台电动机50哇,扩音机消耗功率250瓦,电扇60哇,观众厅由装100瓦灯泡10盏,40瓦灯泡8战,20瓦日光灯11盏,如使用电压220V,...
hard—working hard—working 解析：问题中的candidate指求职者，本题做法亦和第57题相同，销售经理招聘要求第四条。
When ice melts, it absorbs 0.33 per gram. How much ice is required to cool a 12.0 mL drink from 72 degrees to 37 degrees, if the heat capacity of the drink is 4.18? (Assume that the heat transfer is 1 How many grams of ice at -23.9^\circ C can be ...
How much heat needs to be released if a 95 g sample of ethyl alcohol condenses? Heat of Vaporization The heat of vaporization is the required heat that will be added to a substance so that it will evaporate. Every liquid substance has a property needed to change to ...
Answer to: What is the specific heat of an unknown substance if a 2.31 g sample releases 12.5 cal as its temperature changes from 24.9 degrees C to...
B. The liquid loses enough energy to change to a gas. C. The What is the caloric value of 1 liter of 5% dextrose in water (D5W) and how is it calculated? How much heat must 575 grams of water absorb to change from ice at...