Registered: May 2005
Location: Glendale, California
Conceptual Physics Question
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
Last edited by SuPeRSaW2005 on Dec-17-2006 at 06:19
Dec-17-2006 06:14
ASFSE
Supreme tranceaddict
Registered: Aug 2005
Location: the bay
im gonna go with a...not much of a choice there...
EDIT: ok now you put the answers in...
Last edited by ASFSE on Dec-17-2006 at 06:22
Dec-17-2006 06:16
Lira
Ancient BassAddict
Registered: Nov 2001
Location: Brasilia, Brazil
There's a lot of spreading in the Red Light District
EDIT: ok now you put the answers in... but my answer is still correct!
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Last edited by Lira on Dec-17-2006 at 06:26
Dec-17-2006 06:18
JM
Supreme tranceaddict
Registered: Dec 2000
Location: Seattle, USA
quote:
Originally posted by Lira
There's a lot of spreading in the Red Light District
wOOt wOOt!!!
nice one Lira. nice to see a quality post from an old skool TA !
>JM<
Dec-17-2006 06:24
tubularbills
Max Power!
Registered: Apr 2003
Location: Middle of fucking nowhere
B
B
C
Dec-17-2006 06:24
Lira
Ancient BassAddict
Registered: Nov 2001
Location: Brasilia, Brazil
quote:
Originally posted by JM
wOOt wOOt!!!
nice one Lira. nice to see a quality post from an old skool TA !
>JM<
Cheers
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Dec-17-2006 06:26
SuPeRSaW2005
Senior tranceaddict
Registered: May 2005
Location: Glendale, California
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
Dec-17-2006 06:32
tubularbills
Max Power!
Registered: Apr 2003
Location: Middle of fucking nowhere
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.
Dec-17-2006 06:39
SuPeRSaW2005
Senior tranceaddict
Registered: May 2005
Location: Glendale, California
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?
Dec-17-2006 06:45
gtron
Junior tranceaddict
Registered: Dec 2006
Location: Chicago
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.
