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DONE WITH PHYSICS PAPER 11

Lizzie P

Lizzie P

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alsurimi2012 said:
the c
Correct answer is C
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Right. Please explain to me why I should trust an anonymous person on the internet over my physics teacher and a reliable source (physics.info). I'm not going to enter into any more discussions, the answer is A. Elevation is not the same as change in speed, whereas deceleration is.

nothing said:
what is the answer for the damp cloth and the thermometer question
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Temperature falls (option D I think), due to latent heat of evaporation.
 
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Baher Al-3rene

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For The Fuse
Answer Was The Lamps Will Glow But Cables Could Melt
For The Acceleration , The Answer Was A (Da Braking Thing)
For The Car Thing , It Will Speed UP
For The Solenoid Thing , Both Attraction (A)
 
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Wolfgangs

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For the acceleration. I answered according to the statement in a site that says:
Since accelerating objects are constantly changing their velocity, one can say that the distance traveled/time is not a constant value. A falling object for instance usually accelerates as it falls. If we were to observe the motion of a free-falling object, we would observe that the object averages a velocity of approximately 5 m/s in the first second, approximately 15 m/s in the second second, approximately 25 m/s in the third second, approximately 35 m/s in the fourth second, etc. Our free-falling object would be constantly accelerating. Given these average velocity values during each consecutive 1-second time interval, we could say that the object would fall 5 meters in the first second, 15 meters in the second second (for a total distance of 20 meters), 25 meters in the third second (for a total distance of 45 meters), 35 meters in the fourth second (for a total distance of 80 meters after four seconds).
 
Lizzie P

Lizzie P

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Wolfgangs said:
For the acceleration. I answered according to the statement in a site that says:
Since accelerating objects are constantly changing their velocity, one can say that the distance traveled/time is not a constant value. A falling object for instance usually accelerates as it falls. If we were to observe the motion of a free-falling object, we would observe that the object averages a velocity of approximately 5 m/s in the first second, approximately 15 m/s in the second second, approximately 25 m/s in the third second, approximately 35 m/s in the fourth second, etc. Our free-falling object would be constantly accelerating. Given these average velocity values during each consecutive 1-second time interval, we could say that the object would fall 5 meters in the first second, 15 meters in the second second (for a total distance of 20 meters), 25 meters in the third second (for a total distance of 45 meters), 35 meters in the fourth second (for a total distance of 80 meters after four seconds).
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...

Terminal velocity is the speed when a falling object is no longer getting faster. It is when the force due to gravity, called weight, is equal to the opposing force of air resistance. An object continues to fall steadily until air resistance becomes so great that it equals with the pull of gravity and the object can fall no faster. The first place ever, that humans witnessed this was at the Empire State Building. It was the first man-made object that if you threw something off of it, it would take so long to get to the bottom, that it could not speed up any more. Most people believe that this is where the "throw-a-penny" of the Empire State Building will kill someone myth came from. That myth was proven to be false. The Updraft created by the Empire State building would drastically slow down the pennny. Terminal velocity differs for each and every object that reaches it, but for humans, their "max speed" is 210 MPH.

Source: http://simple.wikipedia.org/wiki/Terminal_velocity
 
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fatima hussein

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guys what was the answer for the count rate in 5 hours? i put 0 counts per minute? how can it be anything else??? TELL ME ITS RIGHT
 
SherlockHolmes221B

SherlockHolmes221B

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fatima hussein said:
guys what was the answer for the count rate in 5 hours? i put 0 counts per minute? how can it be anything else??? TELL ME ITS RIGHT
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The answer is 150 counts per minute. Sorry.
Wolfgangs said:
What was answer for the question that involved lifting the weight. It was moving one of the forces to the left or right I assume
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Moving the force to the left was what I answered.
 
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Wolfgangs

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There was the uses for the infrared and the other electromagnetic waves. What were there correct uses? I assume 2 and 4 were the right ones
 
SherlockHolmes221B

SherlockHolmes221B

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fatima hussein said:
what? can you please explain? :( 3 mistakes so far! hope they stay that way...
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I don't remember the original number of counts, but all you had to do was divide it by two. The product also has to be divided by two. This is done five times and the result will be 150 counts per minute. Don't worry! There's always a curve, and from what I've seen a lot of people who did silly mistakes, including me. C:
 
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