~A harrrdd past hsc question on first module~ (1 Viewer)

[kooltrainer]

i dun understand the first question.. wot is it asking?.. can someone write an answer for me? its 6 marks .. omg.. and theres not much u can write about..

the second one is also hard..

 

[me121]

Yes, I think question 19 is hard. I'm not entirely sure of the answer but here goes:

Observation:
Discovery of electromagnetic waves and understanding that light is a kind of electromagnetic wave by Maxwell and Hertz.

Problem raised:
- What is the speed of light relative to, as found from Maxwell equations?
- What is the medium in which light travels?

Hypothesis:
- Ether was proposed
- It was possible to make use of the ether to measure the speed of the Earth in absolute space (i.e. relative to the ether)

Experiment to test hypothesis, Collection of data and Analysis:
- Michelson-Morley experiment

Lack of support:
- Null result

New theory/theories:
- Einstein proposed special relativity and abandoned ether.
- Some ether die-hards modified ether theory

With new hypotheses(plural), the whole cycle is repeated. New experiments to test hypotheses: Eventually, many other experiments rejected all other theories one by one, except Einstein‘s Relativity which has stood the test of experimental scrutiny for over 100 years. Experiments include time dilation of muon decay, atomic clocks in a flying aircraft, mass increase for very fast electrons, and release of nuclear energy in a nuclear bomb.

-Above quote available from http://andrew.harvey4.googlepages.com/

For 5-6 out of 6 marks your answer you must,
"Demonstrates a thorough knowledge of scientific method and Einstein‘s Theory of Special Relativity and the evidence supporting it
- Identifies the evidence to support Einstein‘s Theory of Special Relativity
- Outlines the development and acceptance of the theory
- Links the development of the theory and the evidence supporting it to the steps in the model of scientific method
- Demonstrates coherence and logical progression and includes correct use of scientific principles and ideas"

Q18c. in the attachment

 

[namburger]

2nd question

let's call m0 = M

1.0037M = M /[Root (1 - v^2/c^2) ]
[Root (1 - v^2/c^2) ] = 10000/10037
1 - v^2/c^2 = 0.993
v^2/c^2 = 7.3 x 10^-3

Therefore v = [root (7.3 x 10^-3)] x c
= 0.086 c
= 2.57 x 10^5

 

[aussiechick007]

lmao ok so i just wanted to see if i could do these... and i sure did some stupid mistakes with that mass question... i need to read properly