haboozin
Do you uhh.. Yahoo?
- Joined
- Aug 3, 2004
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- 2005
16. From nearest to furthest, the four satellite moons of Jupiter first observed by Galileo in the year 1610 are called Io, Europa, Granymede and Callisto. For the first three moons, the orbital period T of each is exactly twice the period of the one orbitting immediately inside it. That is, T_Europa = 2xT_Io, T_granymede = 2xT_Europa.
The mass of Jupiter is 1.90x10^27kg and the orbital radius of Io is 421600 Km
a. Use Kepler's Law of periods to Calculate Ganymede's orbital radius 2MARKS
b. Calculate Ganymede's orbital speed.
17,
Einstien's 1905 theory of special relativity made several predictions that could not be verified for many years.
a, state one such prediction 1 MARK
b. describe an experiment to test this prediction 2MARKS
c. Explain how technological advances since 1905 have made it possibe to carry out this experiment
18,
The idea of a universal aether was first proposed to explain the transmission of light through space. Michaelson and moreley attempted to measure the speed of Earth trhough the aether.
Evajualte the impace of the result of the michelson and morely experiment on scientific thinking 4MARKS
19.
In 1970 NASA launched Apollo 13, their third mission planned to land humans on the moon. Half way to the moon a huge explosion crippled the spacecraft. The only wayhome for the astronaut was to fly around the back of the moon and then fire the rocket engine to takt eh craft out of lunar orbit and put it ino an earth bound trajectory. At the completion of the rocket engine burn, mission leader jim lovell washeard to say "we just put isaac newton in the driver's seat"
Given that the spacecraft returned safely to the Earth, justify Jim Lovell's statement.
4MARKS
20. In your corurse you had to gather information to explain how inductin is used in certain applications. With erference to TWO applications, describe how you assessed the reliability of information you found. 6 MARKS
21, Two thin metal tubes one metre long were supported in a vertical wooden rack as shown in the diagram (if u had the sheet haha)
the two ends were connected together, then the other two ends were connected preifly to a car battery as shown in the diagram. It was observed that one of the tubes jumped upwards as the connection was made.
a. explain why only one tube jumped upwards 2 MARKS
b. Each tube has a mass of 1x10^-2 kg and the tube lie on the rack 10cm apart. What minimum current flows when one tube jumps? 3 MARKS
c. what is the implication of this result for power distribution netwrks? 1 MARK
22.
A schematic diagram of a system to supply electricity to a house is shown below
Powerplant ----> step-up transformer --> high voltage tranmission line --> step-down transformer (11000 V) (substation) --> step down transformer 240V
The step down transformer in the substation has a turn ratio of 30:1
a. What is the votlage carried by the high voltage tranimission line. 1 MARK
b. Identify the causes of the two main energy losses in the tranmission of electricity between the power plant and the house. 2 MARKS
c explain how the application of superconductivity could minimize energy loss in a system 2 MARKS.
Q23. Explain how an understanding of black body radiation changed the direction of scientific thinking in the early twentieth century. 3 MARKS.
Q24. Using Labelled diagrams and text, explain how superconductivity occurs according to the BCS theory. 4 MARKS
The mass of Jupiter is 1.90x10^27kg and the orbital radius of Io is 421600 Km
a. Use Kepler's Law of periods to Calculate Ganymede's orbital radius 2MARKS
b. Calculate Ganymede's orbital speed.
17,
Einstien's 1905 theory of special relativity made several predictions that could not be verified for many years.
a, state one such prediction 1 MARK
b. describe an experiment to test this prediction 2MARKS
c. Explain how technological advances since 1905 have made it possibe to carry out this experiment
18,
The idea of a universal aether was first proposed to explain the transmission of light through space. Michaelson and moreley attempted to measure the speed of Earth trhough the aether.
Evajualte the impace of the result of the michelson and morely experiment on scientific thinking 4MARKS
19.
In 1970 NASA launched Apollo 13, their third mission planned to land humans on the moon. Half way to the moon a huge explosion crippled the spacecraft. The only wayhome for the astronaut was to fly around the back of the moon and then fire the rocket engine to takt eh craft out of lunar orbit and put it ino an earth bound trajectory. At the completion of the rocket engine burn, mission leader jim lovell washeard to say "we just put isaac newton in the driver's seat"
Given that the spacecraft returned safely to the Earth, justify Jim Lovell's statement.
4MARKS
20. In your corurse you had to gather information to explain how inductin is used in certain applications. With erference to TWO applications, describe how you assessed the reliability of information you found. 6 MARKS
21, Two thin metal tubes one metre long were supported in a vertical wooden rack as shown in the diagram (if u had the sheet haha)
the two ends were connected together, then the other two ends were connected preifly to a car battery as shown in the diagram. It was observed that one of the tubes jumped upwards as the connection was made.
a. explain why only one tube jumped upwards 2 MARKS
b. Each tube has a mass of 1x10^-2 kg and the tube lie on the rack 10cm apart. What minimum current flows when one tube jumps? 3 MARKS
c. what is the implication of this result for power distribution netwrks? 1 MARK
22.
A schematic diagram of a system to supply electricity to a house is shown below
Powerplant ----> step-up transformer --> high voltage tranmission line --> step-down transformer (11000 V) (substation) --> step down transformer 240V
The step down transformer in the substation has a turn ratio of 30:1
a. What is the votlage carried by the high voltage tranimission line. 1 MARK
b. Identify the causes of the two main energy losses in the tranmission of electricity between the power plant and the house. 2 MARKS
c explain how the application of superconductivity could minimize energy loss in a system 2 MARKS.
Q23. Explain how an understanding of black body radiation changed the direction of scientific thinking in the early twentieth century. 3 MARKS.
Q24. Using Labelled diagrams and text, explain how superconductivity occurs according to the BCS theory. 4 MARKS
