EATS1010ASSIGN1ANS1

EATS1010ASSIGN1ANS1 - ANWSER KEY Hubble (25 marks) A1 Plot...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
ANWSER KEY Hubble (25 marks) A1 Plot the data. This graph should be a polished figure. (12 marks) Use a full page of graph paper and graph this data by hand. By convention, Hubble data is plotted with V on the vertical axis, and D on the horizontal. Draw a straight line, by eye that best fits the points. The slope of this line will lead to the age of Universe. On a two dimensional plot, a straight line means the vertical change is proportional to the horizontal change. Rise/Run is assumed to be consistent through the whole set of data. Velocity (km/s) 650 900 1300 300 580 1100 400 940 810 500 Distance (Mpc) 1.52 2.05 2.37 0.52 1.2 2.35 0.57 1.74 1.49 1 Plot of a subset of Edwin Hubble’s 1929 data showing Linear Relationship between Recessional Velocity and Distance to Galaxies 0 200 400 600 800 1000 1200 1400 0 0.5 1.0 1.5 2.0 2.5 Recessional Velocity (km/s) Point1(1200 km/s, 2.3 Mpc) Point2(100 km/s, 0.2 Mpc) Distance (Mpc)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
i) Title and axis labels (4 marks) 2 points for title if it is well thought out and is representative of the figure. minus 1 if title is just a few words with no real meaning. minus 2 if missing, or fully inadequate (eg “V vs D”) 2 points for axes labels: (0.5 point for each label and each unit) ii) axes (3 marks) minus 3 if: computer generated (flag these) include origin ( minus 1 if not) equal increments for axes ticks (minus 1 per axis if not) sensible subdivision of ticks(eg, 0,5 Mpc, 0.3333 might be acceptable if the graph fits on the whole page) (minus 0.5 per axis if not) iii) Points (3 marks) minus 3 if: computer generated (flag these)
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 4

EATS1010ASSIGN1ANS1 - ANWSER KEY Hubble (25 marks) A1 Plot...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online