IB DP Physics: HL復習筆記7.1.5 Background Radiation
Background Radiation It is important to remember that radiation is a natural phenomenon Radioactive elements have?always?existed on Earth and in outer space However, human activity has added to the...
IB DP Physics: HL復習筆記7.1.4 Isotopes & Radioactive Decay
Isotopes AZX Notation A nuclide is a group of atoms containing the same number of protons and neutrons For example, 5 atoms of oxygen are all the same nuclide but are 5 separate atoms Atomic symbol...
IB DP Physics: HL復習筆記7.1.3 Emission & Absorption Spectrum
Emission & Absorption Spectrum Line Spectra Line spectra is a phenomenon that occurs when excited atoms emit light of certain wavelengths which correspond to different colours This comes from d...
IB DP Physics: HL復習筆記7.1.2 Calculating Discrete Energies
Transitions Between Energy Levels Difference in discrete energy levels The difference between two energy levels is equal to a specific photon energy The energy (hf) of the photon is given by: ΔE?=?...
IB DP Physics: HL復習筆記7.1.1 Discrete Energy Levels
Discrete Energy Levels The Photon Model Photons are fundamental particles that make up all forms of electromagnetic radiation A photon is a massless “packet” or a “quantum” of electromagnetic energ...
IB DP Physics: HL復習筆記6.2.3 Gravitational Field Strength
Gravitational Field Strength There is a universal force of attraction between all matter with?mass This force is known as the ‘force due to gravity’ or the?weight The Earth’s gravitational field is...
IB DP Physics: HL復習筆記6.2.2 Circular Orbits
Circular Orbits Since most planets and satellites have a near circular orbit, the gravitational force?FG?between the sun or another planet provides the?centripetal force?needed to stay in an orbit ...
IB DP Physics: HL復習筆記6.2.1 Newton’s Law of Gravitation
Newton's Law of Gravitation The gravitational force between two bodies outside a uniform field, e.g. between the Earth and the Sun, is defined by Newton’s Law of Gravitation Recall that the mass of...
IB DP Physics: HL復習筆記6.1.4 Applications of Circular Motion
Applications of Circular Motion Horizontal Circular Motion An example of horizontal circular motion is a vehicle driving on a curved road The forces acting on the vehicle are: The?friction?between ...
IB DP Physics: HL復習筆記6.1.3 Centripetal Acceleration
Centripetal Acceleration For an object moving in a circle: The acceleration is towards the centre of the circle The magnitude of the centripetal acceleration?a?is: Where: a =?centripetal accelerati...
美國留學STEM專業有哪些大學可以選擇？
STEM專業因為集聚發展潛力，世界各國都把培養更多相關專業人才作為今后發展的目標。中國留學生中超過40%選擇了STEM專業。它意味著更多、更好地就業機會，以及三年OPT簽證。 美國留學STEM專業有哪些大學可以選擇？...
美本申請Commom App開放，美本申請怎么準備？
8月1日，2022-2023年美本申請Commom App平臺將按承諾開放注冊，這意味著美國大學申請正式開始，大部分學生將在未來一段時間內經歷提前申請，UC申請、常規申請等階段，直到收獲夢想學校Offer。在這段時間里，我們...
