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Flashcards 2022-02-17 Metadata date: 2022-02-17 17:04 tags: - '@?public' - '@?school' - '@?further-maths' - '@?decision' - '@?year-2' title: Further Maths - Crticial Path Analysis

Flashcards 2022-02-10 Where is all radiation emitted from?? An unstable nucleus. What are the four different types of radiation?? Alpha Beta-minus Beta-plus Gamma What particle is emitted in beta-minus radiation?? An electron. What particle is emitted in beta-plus radiation?? A positron. What instrument do you use to detect radiation?? A Geiger-Muller counter. What must you subtract from every Geiger-Muller counter in order to accurately determine the radioactivity of a substance?? The background radiation.

Flashcards 2022-02-08 Where does the definition for $1 \text{au}$ come from?? The average earth-to-sun distance. What does the definition for $1 \text{ly}$ come from?? It’s the speed light travels per year in a vacuum. What’s “parsec” short for?? “parallax arcsecond” What is $1$ degree in arcminutes (READ)?? $$ 60 \text{arcminutes} $$ What is $1$ arcminutes in arcseconds (READ)?? $$ 60 \text{arcseconds} $$ What is $1$ degree in arcseconds (READ)?? $$ 3600 \text{arcseconds} $$ What is the notation for one arcminute?

Flashcards 2022-02-07 What is the first step in using the decimal search method?? Rearranging to get 0 on one side. How can you find a good estimate to start with for decimal search?? Draw a sketch. What should you say when an identifying a root using decimal search?? “Gee wiz! The function $f(x)$ is continuous in the interval $[a, b]$ and there is a change of sign, so a root lies near $x$”. How would you show that $1.

Flashcards 2022-02-07 What are the two types of beta decay?? Beta minus Beta plus How should you write an electron in a beta decay equation?? $$ _{-1}^0 e $$ When denoting particles in a beta decay equation, such as $_y^x \alpha$, what does $y$ represent?? The charge. When denoting particles in a beta decay equation, such as $_y^x \alpha$, what does $x$ represent?? The nucleon number. What two quantities are conserved in a beta decay equation?

Flashcards 2022-02-07 Can you use SUVAT in two dimensions?? Yes. Backlinks [[Maths - Syllabus]]S Metadata date: 2022-02-07 12:34 tags: - '@?mechanics' - '@?maths' - '@?year-2' - '@?school' - '@?public' title: Mechanics - Further Kinematics

Flashcards 2022-01-31 What are the four fundamental forces?? Strong nuclear force Weak nuclear force Electromagnetic force Gravitational force In what context does the strong nuclear force show up?? Holding nucleons together. When does the electromagnetic force act?? When two charged objects interact. In what context does the weak nuclear force show up?? Beta decay. When does the gravitational force show?? When any particles have mass. What is the relative strength of the strong nuclear force?

Flashcards 2022-01-26 What simplifying model do we use when talking about emitters and absorbers of electromagnetic radiation?? Black bodies. What two main assumptions are made about a black body?? They are perfect emitters and absorbers of electromagnetic radiation They emit radiation at all wavelengths Why is the sun yellow if it can be modelled as a near-perfect black body?? Because it is hotter than its surroundings and so is glowing. What is special about how a black body emits radiation at all wavelengths?

Flashcards 2022-01-25 What is this?? A Hertzsprung-Russell diagram. What is on the $x$-axis of a Hertzsprung-Russell diagram?? Temperature. Which out of luminosity and temperature goes in the wrong direction on a Hertzsprung-Russell diagram?? Temperature. What is on the $y$-axis of a Hertzsprung-Russell diagram?? Luminosity. What is sometimes confusing about the temperature values on a Hertzsprung-Russell diagram?? They measure “effective temperature”, not the temperature of the core. What are the units for luminosity measured on a Hertzsprung-Russell diagram?

Flashcards 2022-01-25 What is the cross product useful for?? Finding a normal vector to two other vectors. What is another name for the cross product?? The vector product. Does the cross product give you a scalar or a vector answer?? A vector. How can you work out the direction of the cross product of two vectors?? Using the right hand rule. In the right hand rule for working out the direction of the cross product, what is the first vector $a$ represented by?

Flashcards 2022-01-20 What did J. J. Thomson discover in 1897?? The electron. What model did J. J. Thomson propose for the atom?? The plum pudding model. What is the plum pudding model?? The idea that an atom contains negative electrons embedded in a uniform sea of positive charge. What is the one-sentence summary of the alpha-scattering experiment?? Fire alpha particles at a thin gold film and see where the alpha particles are deflected to using a microscope.

Flashcards 2022-01-19 What’s the reducible differential equations topic about?? Transforming complicated differential equations into simpler ones using a substitution. If $z = \frac{y}{x}$, or $y = xz$ what is $\frac{\text{d}y}{\text{d}x}$?? $$ \frac{\text{d}y}{\text{d}x} = z + x\frac{\text{d}z}{\text{d}x} $$ What’s the first stage in doing a first-order reducible differential equations question?? Working out how to substitute the derivative by differentiating. If a reducible differential equations question asks you to substitute $z = \frac{y}{x}$ then what is the first step?