WEILAI Online Academic assistant
WEILAI Online Academic assistant
Back to 课程

Maths Gcse Wjec-Eduqas Higher

0% Complete
0/0 Steps
  1. Scatter-Graphs-And-Correlation Wjec-Eduqas Higher
    2 主题
  2. Cumulative-Frequency-And-Box-Plots Wjec-Eduqas Higher
    4 主题
  3. Histograms Wjec-Eduqas Higher
    3 主题
  4. Statistical-Diagrams- Wjec-Eduqas Higher
    6 主题
  5. Averages-Ranges-And-Data Wjec-Eduqas Higher
    8 主题
  6. Combined-And-Conditional-Probability Wjec-Eduqas Higher
    3 主题
  7. Tree-Diagrams- Wjec-Eduqas Higher
    1 主题
  8. Simple-Probability-Diagrams- Wjec-Eduqas Higher
    3 主题
  9. Introduction-To-Probability Wjec-Eduqas Higher
    3 主题
  10. Transformations Wjec-Eduqas Higher
    5 主题
  11. Vectors Wjec-Eduqas Higher
    6 主题
  12. 3D-Pythagoras-And-Trigonometry Wjec-Eduqas Higher
    1 主题
  13. Sine-Cosine-Rule-And-Area-Of-Triangles- Wjec-Eduqas Higher
    4 主题
  14. Pythagoras-And-Trigonometry Wjec-Eduqas Higher
    4 主题
  15. Area-And-Volume-Of-Similar-Shapes Wjec-Eduqas Higher
    1 主题
  16. Congruence-Similarity-And-Geometrical-Proof Wjec-Eduqas Higher
    5 主题
  17. Volume-And-Surface-Area- Wjec-Eduqas Higher
    3 主题
  18. Circles-Arcs-And-Sectors- Wjec-Eduqas Higher
    2 主题
  19. Area-And-Perimeter- Wjec-Eduqas Higher
    4 主题
  20. Circle-Theorems Wjec-Eduqas Higher
    7 主题
  21. Bearings-Scale-Drawing-Constructions-And-Loci Wjec-Eduqas Higher
    5 主题
  22. Angles-In-Polygons-And-Parallel-Lines Wjec-Eduqas Higher
    3 主题
  23. Symmetry-And-Shapes Wjec-Eduqas Higher
    6 主题
  24. Exchange-Rates-And-Best-Buys Wjec-Eduqas Higher
    2 主题
  25. Standard-And-Compound-Units- Wjec-Eduqas Higher
    5 主题
  26. Direct-And-Inverse-Proportion- Wjec-Eduqas Higher
    2 主题
  27. Problem-Solving-With-Ratios Wjec-Eduqas Higher
    2 主题
  28. Ratios Wjec-Eduqas Higher
    3 主题
  29. Sequences Wjec-Eduqas Higher
    4 主题
  30. Transformations-Of-Graphs- Wjec-Eduqas Higher
    2 主题
  31. Graphing-Inequalities- Wjec-Eduqas Higher
    2 主题
  32. Solving-Inequalities- Wjec-Eduqas Higher
    2 主题
  33. Real-Life-Graphs Wjec-Eduqas Higher
    4 主题
  34. Estimating-Gradients-And-Areas-Under-Graphs Wjec-Eduqas Higher
    2 主题
  35. Equation-Of-A-Circle- Wjec-Eduqas Higher
    2 主题
  36. Graphs-Of-Functions Wjec-Eduqas Higher
    6 主题
  37. Linear-Graphs Wjec-Eduqas Higher
    4 主题
  38. Quadratic-Equations Wjec-Eduqas Higher
    4 主题
  39. Linear-Equations- Wjec-Eduqas Higher
    1 主题
  40. Algebraic-Proof Wjec-Eduqas Higher
    1 主题
  41. Rearranging-Formulae Wjec-Eduqas Higher
    2 主题
  42. Coordinate-Geometry- Wjec-Eduqas Higher
    4 主题
  43. Functions Wjec-Eduqas Higher
    3 主题
  44. Forming-And-Solving-Equations Wjec-Eduqas Higher
    3 主题
  45. Iteration Wjec-Eduqas Higher
    2 主题
  46. Simultaneous-Equations Wjec-Eduqas Higher
    2 主题
  47. Algebraic-Fractions- Wjec-Eduqas Higher
    4 主题
  48. Completing-The-Square Wjec-Eduqas Higher
    1 主题
  49. Factorising Wjec-Eduqas Higher
    6 主题
  50. Expanding-Brackets Wjec-Eduqas Higher
    3 主题
  51. Algebraic-Roots-And-Indices Wjec-Eduqas Higher
    1 主题
  52. Introduction-To-Algebra Wjec-Eduqas Higher
    4 主题
  53. Using-A-Calculator Wjec-Eduqas Higher
    1 主题
  54. Surds Wjec-Eduqas Higher
    2 主题
  55. Rounding-Estimation-And-Bounds Wjec-Eduqas Higher
    2 主题
  56. Fractions-Decimals-And-Percentages Wjec-Eduqas Higher
    3 主题
  57. Simple-And-Compound-Interest-Growth-And-Decay Wjec-Eduqas Higher
    4 主题
  58. Percentages Wjec-Eduqas Higher
    3 主题
  59. Fractions Wjec-Eduqas Higher
    4 主题
  60. Powers-Roots-And-Standard-Form Wjec-Eduqas Higher
    4 主题
  61. Prime-Factors-Hcf-And-Lcm- Wjec-Eduqas Higher
    4 主题
  62. Number-Operations Wjec-Eduqas Higher
    10 主题
课 Progress
0% Complete

Exam code:C300

Speed, density & pressure

What are speed, density and pressure?

  • Speed, density and pressure are frequently used compound measures

    • Speed is equal to distance divided by time

    • Density is equal to mass divided by volume

    • Pressure is equal to force divided by area

Formula Triangles for Speed, Density and Pressure

What should I know about speed, distance and time?

  • Speed is commonly measured in metres per second (m/s) or kilometres per hour (km/h)

    • The units indicate speed is distance per time
      Speed equals Distance over Time

  • ‘Speed‘ (in this formula) means ‘average speed‘

  • In harder problems there are often two journeys or two parts to one longer journey

What should I know about density, mass and volume?

  • Density is usually measured in grams per centimetre cubed (g/cm3) or kilograms per metre cubed (kg/m3)

    • The units indicate that density is mass per volume
      Density equals Mass over Volume

  • You may need to use a volume formula to find the volume of an object first

What should I know about pressure, force and area?

  • Pressure is usually measured in Newtons per square metre (N/m2)

    • The units of pressure are often called Pascals (Pa) rather than N/m2

    • The units indicate that pressure is force per area
      Pressure equals Force over Area

  • Remember that weight is a force

    • It is different to mass

Examiner Tips and Tricks

  • Look out for a mixture of units

    • Time can be given as minutes but common phrases like ‘half an hour’ (30 minutes) could also be used in the same question

    • Any mixed units should be those in common use and easy to convert, e.g., g to kg or m to km etc

Worked Example

A box exerts a force of 140 newtons on a table.
The pressure on the table is 35 newtons/m2.

p equals F over A <img alt=”p space equals space pressure
F space equals space force
A space equals space area” data-mathml='<math ><semantics><mrow><mi>p</mi><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><mi>pressure</mi><mspace linebreak=”newline”></mspace><mi>F</mi><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><mi>force</mi><mspace linebreak=”newline”></mspace><mi>A</mi><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><mi>area</mi></mrow><annotation encoding=”application/vnd.wiris.mtweb-params+json”>{“language”:”en”,”fontFamily”:”Times New Roman”,”fontSize”:”18″,”autoformat”:true}</annotation></semantics></math>’ height=”74″ role=”math” src=”data:image/svg+xml;charset=utf8,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20xmlns%3Awrs%3D%22http%3A%2F%2Fwww.wiris.com%2Fxml%2Fmathml-extension%22%20height%3D%2274%22%20width%3D%2296%22%20wrs%3Abaseline%3D%2236%22%3E%3C!–MathML%3A%20%3Cmath%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmi%3Ep%3C%2Fmi%3E%3Cmo%3E%26%23xA0%3B%3C%2Fmo%3E%3Cmo%3E%3D%3C%2Fmo%3E%3Cmo%3E%26%23xA0%3B

Responses

您的邮箱地址不会被公开。 必填项已用 * 标注