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Conceptual Physics Question
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| SuPeRSaW2005 |
I have a big physics examination coming up, very basic, introductory physics...any physics pros in here that can help me answer these few questions?
1) Which light spreads out most (or fastest)(not sure which makes more sense)?
a) laser light
b) flashlight light
c) sunlight
2) Two objects, object A and B, free fall together from a high altitude. Assume Object A weighs less and both object A and object B have the same shape. Which object will reach terminal velocity quicker?
a) Object A
b) Object B
c) Both at same time
d) Not enough information
3) If you throw a baseball up to the sky, there is ________ air pressure at the bottom of the ball than at the top of it, which means there is ______ velocity under the ball than there is at the bottom.
a) more, less
b) less, more
c) more, more
d) less, less
Any one sure about any of these?
Thanks in advance |
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| ASFSE |
im gonna go with a...not much of a choice there...
EDIT: ok now you put the answers in... |
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| Lira |
There's a lot of spreading in the Red Light District :p
EDIT: ok now you put the answers in... but my answer is still correct! :toothless |
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| JM |
| quote: | Originally posted by Lira
There's a lot of spreading in the Red Light District :p |
wOOt wOOt!!!
nice one Lira. nice to see a quality post from an old skool TA !
>JM< |
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| Lira |
| quote: | Originally posted by JM
wOOt wOOt!!!
nice one Lira. nice to see a quality post from an old skool TA !
>JM< |
Cheers :D |
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| SuPeRSaW2005 |
| im sorry, but do u guys know for sure or are u guys just guessing? because i really need to know this stuff for sure...thanks |
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| tubularbills |
| quote: | Originally posted by SuPeRSaW2005
im sorry, but do u guys know for sure or are u guys just guessing? because i really need to know this stuff for sure...thanks |
1)
B - visible light, in the form of the full specturm [i.e. white light] spreds out more than any color does individually [i.e., the sun]. the laser light is infrared, and does not scatter as much, since it's of a different wavelength.
2)
B - since the objects are not in a vaccum, the heavier object [object B] will reach terminal velocity faster.
3)
C - there is more pressure underneath the ball because pressure decreases with heigh in the atmosphere. the second part of the question is worded awfully awkward. i don't know what they're getting at. but, it has to be either A/C so pick one.
its been awhile since i've had physics like this, but that was the quick and dirtay rationale i had on those questions. |
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| SuPeRSaW2005 |
for number 2, when u say object b will reach terminal velocity faster.....
i know for sure that the heavier object (object b) will hit the ground first, but is that the same thing as saying it will reach terminal velocity faster THATS why itll hit the ground first? |
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| gtron |
| quote: | Originally posted by SuPeRSaW2005
im sorry, but do u guys know for sure or are u guys just guessing? because i really need to know this stuff for sure...thanks |
you need to know for sure so you ask a message board. :haha: |
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| Zenchowdah |
| quote: | Originally posted by tubularbills
2)
B - since the objects are not in a vaccum, the heavier object [object B] will reach terminal velocity faster.
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drop an ant and a buick, see what happens |
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| DJ Mikey Mike |
| quote: | Originally posted by SuPeRSaW2005
any physics pros in here that can help me answer these few |
Yea, because the questions asked here would make even Einstein sit back for a second and say 'hang on, WOAH!' |
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