2 (a) State what is meant by kinetic energy.相关知识点: 试题来源: 解析 动能是物体由于其运动而具有的能量。物体运动得越快,其动能就越大。例如,一辆快速行驶的汽车比一辆缓慢行驶的汽车具有更大的动能。 问题要求解释动能的含义。参考答案“动能是物体由于其运动而具有的能量”简洁明了地回答了这个问题,是...
(a)(i) Use the unit MJ kg-1 to deduce what is meant by energy density... [1 1](ii) Determine the rate of consumption of natural gas in the power stations.rate...kg s-1 [2](b) The radiant power of the Sun is 3.90 x 1026 W. The average radius of the Earth's orbit about...
4 (a)Explain what is meant by the internal energy of a gas.[1](b) An ideal gas has a volume of 1.8×10-3 m3 at a pressure of 3.3×105 P a and a temperature of 37 C.(i)Show that the number of molecules in the gas is 1.4× 1023.[1](ii)The gas expands so that its v...
百度试题 结果1 题目(a) State what is meant by a gravitational field. bó 1...。[1] 相关知识点: 试题来源: 解析 Region of space in which a mass experiences a force 反馈 收藏
(a) (i) What is meant by the term enthalpy change of hydration, △H_1°_(2)=30°(ii) Write an equation that represents the AHayd of the Mg2+ ion.(iii) Suggest a reason why AHfy a of the Mg2+ ion is greater than AHyd of the Ca2+ ion.(iv) Suggest why it is impossible to...
结果1 题目(c) What is meant by the term unsaturated hydrocarbon?unsaturated hydrocarbon 相关知识点: 试题来源: 解析 (contains) double bond/ triple bond/ multiple bond(s)/not all bonds are single(contains) carbon and hydrogen only 反馈 收藏 ...
解析 The frequency of a progressive wave is the number of cycles of the wave that pass a fixed point per unit time. 频率是指单位时间内波形重复的次数。对于进行波来说,频率指的是单位时间内波形经过某一点的次数。 简而言之,频率代表了波的振动速度,它决定了波的音调或颜色。
(a) State what is meant by the specific latent heat of fusion (melting) of a substance.[2] 相关知识点: 试题来源: 解析 (a) energy/heat needed to change state of substance/melt(from solid to liquid at constant temperature/ melting point) per kg/per unit mass ...
The ground state of an atom refers to its lowest energy state, where the atom's electrons occupy the lowest energy levels possible, resulting in the most stable configuration for the atom. 原子的基态是指原子处于最低能量状态,此时原子中的电子占据着能量最低的轨道,即最靠近原子核的轨道。这是原子...
What is meant by nouveau ficheA.People with refined taste.B.Conspicuous consumers.C.The newly rich.D.People with responsibilities.的答案是什么.用刷刷题APP,拍照搜索答疑.刷刷题(shuashuati.com)是专业的大学职业搜题找答案,刷题练习的工具.一键将文档转化为在线题