What is an optical fibre - Study guides, Class notes & Summaries

BTEC Applied Science Unit 1 Chemistry Exam 271 Questions with Answers How many electrons can an s subshell hold? - CORRECT ANSWER 2 How many electrons can a p subshell hold? - CORRECT ANSWER 6 How many electrons can a d subshell hold? - CORRECT ANSWER 10 Which subshells are available in the first energy level? - CORRECT ANSWER s Which subshells are available in the second energy level? - CORRECT ANSWER s and p Which subshells are available in the third energy level? - CORRECT...

In an investigation into taxis, termites were split into 3 groups Group A had their eyes covered (moved straight up) Group B had their antenna covered (moved straight to light) Group C were the control (moved diagonally up and towards light) What does Group A show about the factors controlling termite movement? Antenna involved in response to gravity Don't respond to light as eyes are covered In a graph of membrane permeability against time, the line for Na+ ions increases rapidly betwee...

1. How many electrons can an s subshell hold? 2 2. How many electrons can a p subshell hold? 6 3. How many electrons can a d subshell hold? 10 4. Which subshells are available in the first energy level? 5. Which subshells are available in the second en- ergy level? 6. Which subshells are available in the third energy level? s s and p s, p and d 7. What is Hund's rule? (Think bus seats!) Every orbital in a sub- shell must be singly filled with an electron before any one orbital can be d...

BTEC IT Level 3 - Unit 1 Exam 698 Questions with Verified Answers What is a digital device? -CORRECT ANSWER Piece of physical equipment that uses digital data, such as by sending, receiving, storing or processing it. What 9 types of digital devices are there? -CORRECT ANSWER 1. Personal Computers 2. Mobile Devices 3. Servers 4. Entertainment Systems 5. Navigation Systems 6. Multifunctional Devices 7. Digital Cameras 8. Data capture and Collection Systems 9. Communication device...

State what is meant by the term analogue signal (1 mark) - Correct answer-A signal that can have any value State what is meant by the term digital signal (1 mark) - Correct answer-A signal that has 2 values only which are 0 and 1. Explain 2 advantages of using digital signals instead of analogue signals to transmit television programmes. (2 marks) - Correct answer-1. Digital Signals can carry more info than Analogue signals. 2. Less interference so better quality is produced. Give 2 othe...

Amplitude - Correct answer-The maximum value of displacement in the oscillation cycle Displacement - Correct answer-How far the quantity has moved from its rest value at any given time Period - Correct answer-The time taken for one whole cycle of an oscillation Oscillation - Correct answer-A regularly repeating motion about a central value Wave speed equation - Correct answer-Wave speed = frequency x wavelength / v=fλ Transverse waves - Correct answer-The displacement of the wave is at ri...

BTEC Applied Science - Physics Exam Questions. State what is meant by the term analogue signal (1 mark) - ANSWERA signal that can have any value State what is meant by the term digital signal (1 mark) - ANSWERA signal that has 2 values only which are 0 and 1. Explain 2 advantages of using digital signals instead of analogue signals to transmit television programmes. (2 marks) - ANSWER1. Digital Signals can carry more info than Analogue signals. 2. Less interference so better quality is prod...

Application Software Application software is what allows the end user of an IT system to perform taks productivity software Productivity software is used to allow users to perform their work-based tasks more efficiently E.g. Word processing/Spreadsheet/Database/Presentation Graphics and Multimedia Software Graphics and Multimedia software is used to produce graphics and multimedia products on your computer system E.g. CAD/graphics editing/desktop publishing/video editing software Persona...

AQA a level physics paper 1 100% SOLUTIONS REVISED 2023//2024 What is meant by work function (2) - ANSWER Minimum energy required by an electron to escape from (1) a metal surface (1) What is meant by ionisation energy? (2) - ANSWER Minimum energy required to remove an electron from an atom (1) from the ground state (1) Why do emitted electrons have a kinetic energy that varies up to a maximum value? (4) - ANSWER Energy of a photon is fixed/constant (1) Energy is required for ele...

A Wave - Correct answer-is something that transfers energy from one place to another without transferring any matter over that distance Longitudinal waves - Correct answer-A wave where the oscillations are parallel to the direction that the wave transfers energy. Examples; Sound waves, P-waves after earthquakes Transverse waves - Correct answer-A wave where oscillations are perpendicular to the direction that the wave transfers energy. E.g. all Electro magnetic waves on the EM spectrum. e...