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Mass x Gravity Mass x Gravity x Height Mass x 9.8 E = mc2 As force = ma, and in this case a is acceleration due to gravity, the answer must be 'Mass x Gravity.' Some people may be tricked into thinking [c] is the answer, but on other planets, and indeed even earth, gravity is not always equal to 9.8, making [a] the most correct answer.
Mass x Gravity Mass x Gravity x Height Mass x 9.8 E = mc2
As force = ma, and in this case a is acceleration due to gravity, the answer must be 'Mass x Gravity.' Some people may be tricked into thinking [c] is the answer, but on other planets, and indeed even earth, gravity is not always equal to 9.8, making [a] the most correct answer.
Satellites do not have GPE GPE is always positive The maximum value for GPE is zero. GPE is asymptotic to zero. This is a tricky one. [a] is obviously wrong. Some people may assume [b] is correct, but as Einstein stated, "since the GPE of an object drops to zero only at an infinite distance from a planet, it must be negative as GPE increases with increased height." For that reason, GPE is always negative, not positive, ruling out [b]. Others may assume [c] is correct based on the above statement by Einstein. However, GPE only reaches zero at an infinite distance from a planet. This is because 1 over infinity is so close to zero it's not funny. But the fact remains that one over infinity is still just a very small fraction, not zero, meaning GPE can never reach zero. By deduction from this previous explaination, [d] must be the answer as GPE will get closer and closer to zero but never actually make it.
Satellites do not have GPE GPE is always positive The maximum value for GPE is zero. GPE is asymptotic to zero.
This is a tricky one. [a] is obviously wrong. Some people may assume [b] is correct, but as Einstein stated, "since the GPE of an object drops to zero only at an infinite distance from a planet, it must be negative as GPE increases with increased height." For that reason, GPE is always negative, not positive, ruling out [b]. Others may assume [c] is correct based on the above statement by Einstein. However, GPE only reaches zero at an infinite distance from a planet. This is because 1 over infinity is so close to zero it's not funny. But the fact remains that one over infinity is still just a very small fraction, not zero, meaning GPE can never reach zero. By deduction from this previous explaination, [d] must be the answer as GPE will get closer and closer to zero but never actually make it.
Delayed Human Reaction Height above sea level Air Resistance None of the Above All of the above statements could have accounted for his inaccurate result. A poor human reaction would create inaccurate timings, meaning the value for 'g' would be calculated using wrong values. [b] could also be a legitimate reason as the value of 'g' varies with altitude. And of course [c] could have contributed as air resistance would slow down the pendulum, increasing the period of motion, hence leading to an incorrect value for 'g.' [d] must therefore be the answer.
Delayed Human Reaction Height above sea level Air Resistance None of the Above
All of the above statements could have accounted for his inaccurate result. A poor human reaction would create inaccurate timings, meaning the value for 'g' would be calculated using wrong values. [b] could also be a legitimate reason as the value of 'g' varies with altitude. And of course [c] could have contributed as air resistance would slow down the pendulum, increasing the period of motion, hence leading to an incorrect value for 'g.' [d] must therefore be the answer.
It is the same on all planets It is proportional to the mass of the planet It is 9.8 on earth It is proportional to the radius of the planet [a] is obviously wrong. [c] is a common answer but it is wrong because the value of 'g' varies at different places on the earth due to altitude. [d] is also wrong because the value of 'g' is inversely proportional to the radius, not proportionally. [b] therefore must be the answer. This question could be solved easily by having the formula sheet in front of you.
It is the same on all planets It is proportional to the mass of the planet It is 9.8 on earth It is proportional to the radius of the planet
[a] is obviously wrong. [c] is a common answer but it is wrong because the value of 'g' varies at different places on the earth due to altitude. [d] is also wrong because the value of 'g' is inversely proportional to the radius, not proportionally. [b] therefore must be the answer. This question could be solved easily by having the formula sheet in front of you.
It will travel the same horizontal distance if fired at 40 degrees or 50 degrees Projectiles follow a parabolic path The maximum range of a projectile is acquired by firing at 45 degrees to the horizontal All of the above All of the above statements are true. If we neglect air resistance, a projectile will fly the same horizontal distance if fired at 40 degrees or 50 degrees. This applies for any set of degrees that is symmetrical about 45 degrees (eg: 35 and 55, 15 and 75). [b] is also true as stated by Galileo. [c] is also true. [c] can be proven by deriving Cartesian equations of motion for a projectile's path. This is beyond the scope of the Physics course but extension maths students should be able to do this. For that reason, [d] is the answer.
It will travel the same horizontal distance if fired at 40 degrees or 50 degrees Projectiles follow a parabolic path The maximum range of a projectile is acquired by firing at 45 degrees to the horizontal All of the above
All of the above statements are true. If we neglect air resistance, a projectile will fly the same horizontal distance if fired at 40 degrees or 50 degrees. This applies for any set of degrees that is symmetrical about 45 degrees (eg: 35 and 55, 15 and 75). [b] is also true as stated by Galileo. [c] is also true. [c] can be proven by deriving Cartesian equations of motion for a projectile's path. This is beyond the scope of the Physics course but extension maths students should be able to do this. For that reason, [d] is the answer.
Projectiles follow a parabolic path A cannon ball and a feather would reach the ground at the same time in a vacuum Horizontal and vertical components of projectile motion occurred independently of one another but simultaneously If a projectile is fired at a high enough velocity it will escape the gravitational field of a planet and begin to orbit All the above statements were made by Galileo except for [d], which was an idea proposed by Newton.
Projectiles follow a parabolic path A cannon ball and a feather would reach the ground at the same time in a vacuum Horizontal and vertical components of projectile motion occurred independently of one another but simultaneously If a projectile is fired at a high enough velocity it will escape the gravitational field of a planet and begin to orbit
All the above statements were made by Galileo except for [d], which was an idea proposed by Newton.
To take advantage of the spin of the earth and receive a velocity boost To avoid the Van Allen radiation belts So as to not launch towards the sun So astronauts are not subjected to the 'g' forces that occur when launching East to West This is a pretty easy question. By launching rockets from West to East, rockets receive a velocity boost courtesy of the earth's spin.
To take advantage of the spin of the earth and receive a velocity boost To avoid the Van Allen radiation belts So as to not launch towards the sun So astronauts are not subjected to the 'g' forces that occur when launching East to West
This is a pretty easy question. By launching rockets from West to East, rockets receive a velocity boost courtesy of the earth's spin.
Water Cannons A re-entry degree between 5.2 and 7.2 degrees Television Communication with Houston This is the easiest question in the test. Has to be [b]
Water Cannons A re-entry degree between 5.2 and 7.2 degrees Television Communication with Houston
This is the easiest question in the test. Has to be [b]
Albert Einstein Galileo Sir Isaac Newton Neils Bohr
Tension on a string that is being swung with a weight on the end Friction between tyres and the road on a corner Spin on a sliced golf ball Gravitational pull on a satellite [a], [b] and [d] are all examples of a centripetal force because they are pulling the object towards the centre of the circular motion. Gravity pulls the satellite towards a planet, friction keeps the car from skidding off the outside of the road and the tension on the string stops the weight on the end from flying off. The slice on the golf ball is caused by a movement of air, not a centripetal force.
Tension on a string that is being swung with a weight on the end Friction between tyres and the road on a corner Spin on a sliced golf ball Gravitational pull on a satellite
[a], [b] and [d] are all examples of a centripetal force because they are pulling the object towards the centre of the circular motion. Gravity pulls the satellite towards a planet, friction keeps the car from skidding off the outside of the road and the tension on the string stops the weight on the end from flying off. The slice on the golf ball is caused by a movement of air, not a centripetal force.
They orbit between an altitude of 250km and 1000km They orbit above the Van Allen radiation belts They take about 90 minutes to complete an orbit They are used to survey the surface All the above statements are true except [b]. Low-earth orbits are below the Van Allen radiation belts.
They orbit between an altitude of 250km and 1000km They orbit above the Van Allen radiation belts They take about 90 minutes to complete an orbit They are used to survey the surface
All the above statements are true except [b]. Low-earth orbits are below the Van Allen radiation belts.
There is a geostationary satellite above Sydney They orbit perpendicular to the equator They orbit at the upper limits of the Van Allen radiation belts They complete an orbit in 12 hours [a] is wrong because geostationary satellites must orbit above the equator, and Sydney is not on the equator. [b] is wrong because they orbit parallel to the equator, not perpendicular. [d] is wrong because a geostationary satellite must complete and orbit in 24 hours in order for it to stay above the same point on the earth. [c] is the correct answer as geostationary satellites orbit at the upper limits of the Van Allen radiation belts, meaning they do have some problems with interference.
There is a geostationary satellite above Sydney They orbit perpendicular to the equator They orbit at the upper limits of the Van Allen radiation belts They complete an orbit in 12 hours
[a] is wrong because geostationary satellites must orbit above the equator, and Sydney is not on the equator. [b] is wrong because they orbit parallel to the equator, not perpendicular. [d] is wrong because a geostationary satellite must complete and orbit in 24 hours in order for it to stay above the same point on the earth. [c] is the correct answer as geostationary satellites orbit at the upper limits of the Van Allen radiation belts, meaning they do have some problems with interference.
The Universal Gravitational Constant Radius of the orbit Mass of the planet being orbited Mass of the satellite Once again, a very easy question is you use the supplied formula sheet.
The Universal Gravitational Constant Radius of the orbit Mass of the planet being orbited Mass of the satellite
Once again, a very easy question is you use the supplied formula sheet.
Houston, we have a problem Ionisation Blackout Radio Wave Interference RECL (Re-Entry Communication Loss)
4 8 20 28
Slingshot Effect Gravity Assist Manoeuvre Orbital Swing Planetary Swing-by Technique The slingshot effect, gravity assist manoeuvre and planetary swing-by technique are all terms used to describe this technique.
Slingshot Effect Gravity Assist Manoeuvre Orbital Swing Planetary Swing-by Technique
The slingshot effect, gravity assist manoeuvre and planetary swing-by technique are all terms used to describe this technique.
It permeated all matter It had high density It was luminiferous It was invisible The aether was proposed as a medium which permeated all matter, was invisible and luminiferous.
It permeated all matter It had high density It was luminiferous It was invisible
The aether was proposed as a medium which permeated all matter, was invisible and luminiferous.
The movement of the earth through the aether would create an aether wind The aether should bend light Einstein had said it would work The Speed of Light in a vacuum The premise behind the Michelson-Morley experiment was that the movement of the earth through the aether should create an aether wind. This aether wind would slow down beams of light that were fired into it. The fact that no change in light inference patterns was observed meant that the experiment was given a null result, as it violated the premise on which the experiment was based.
The movement of the earth through the aether would create an aether wind The aether should bend light Einstein had said it would work The Speed of Light in a vacuum
The premise behind the Michelson-Morley experiment was that the movement of the earth through the aether should create an aether wind. This aether wind would slow down beams of light that were fired into it. The fact that no change in light inference patterns was observed meant that the experiment was given a null result, as it violated the premise on which the experiment was based.
Galilean Relativity Newtonian Relativity Special Relativity Einstein's Relativity It was Galileo who proposed that the same laws of physics apply in both inertial and non-inertial frames of reference.
Galilean Relativity Newtonian Relativity Special Relativity Einstein's Relativity
It was Galileo who proposed that the same laws of physics apply in both inertial and non-inertial frames of reference.
Space becomes relative Time becomes relative Speed of light becomes constant Both a & b In Newtonian relativity, space is relative but time is constant. However, in Special Relativity, space and time are both relative, meaning that the main difference between Newtonian and Special relativity is that time becomes relative.
Space becomes relative Time becomes relative Speed of light becomes constant Both a & b
In Newtonian relativity, space is relative but time is constant. However, in Special Relativity, space and time are both relative, meaning that the main difference between Newtonian and Special relativity is that time becomes relative.
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