Longitudinal Waves Longitudinal Waves A longitudinal wave is one where the particles oscillate?parallel?to the; Propagation of the wave Direction of energy transfer Longitudinal waves show areas of...
The Wave Equation The Wave Equation This equation links wave speed, frequency and wavelength Where: v?= velocity of the wave (m s–1) f?= frequency of the wave (Hz) λ?= wavelength (m) The wav...
Properties of Waves Waves are generated by?oscillating sources These oscillations travel?away?from the source Oscillations can propagate through a?medium?(e.g. air, water) or in a?vac...
Area Under a Force-Extension Graph For a material which obeys Hooke's law, the elastic strain energy,?Eel?can be determined by finding the area under the force-extension graph Since this are...
Core Practical 5: Investigating Young Modulus of a Material To measure the Young Modulus of a metal in the form of a wire requires a clamped horizontal wire over a pulley (or vertical wire a...
Stress-Strain Graphs Stress-strain curves give an indication of the properties of materials such as Up to what stress and strain they obey Hooke's Law Whether they exhibit elastic and/or pla...
Force-Extension Graphs The way a material responds to a tensile or compressive force can be shown on a force-extension, or a force-compression graph Although compression can be put into?equa...
Stress & Strain Stress Stress is the?applied force per unit cross sectional area?of a material Forces can be; Tensile forces, which pull on an object and extend it Compressive forces, which pus...
在申請過程中，成績往往是一個門檻，擁有豐富的背景才能提升自己的核心競爭力，而背景提升里，各種國際學術活動獎項便是一把利刃。 化學學術活動則是為一些化學學習的優秀人才提供表現和學習的平臺，通過知識的碰...
好消息！2022年中國學生終于可以直接參加BMO了，不需要再參加SMC了。 在2022年以前，想要參加BMO英國數學奧賽，就必須參加SMC(Senior Maths Challenge)并且取得優異成績，但是SMC不接受個人報名，只能通過注冊為U...
FBLA（Future Business Leaders of America）始于1942年，迄今為止已有超過70年歷史，由哥倫比亞大學的教授發起，是全球最大的學生職業發展組織和商業素養教育組織之一，也是美國高中影響力最大的商科賽事，堪稱...
Hooke's Law When a force?F?is added to the bottom of a vertical metal wire of length?L, the wire?stretches A material obeys Hooke’s Law if: The extension of the material is directly proportional to...
