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

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

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!

___________________
Indiana Clones Upcoming Sets
[ I May Upload Something Someday ]

Last edited by Lira on Dec-17-2006 at 06:26

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<

B
B
C

quote:

Originally posted by JM wOOt wOOt!!! nice one Lira. nice to see a quality post from an old skool TA ! >JM<

Cheers

___________________
Indiana Clones Upcoming Sets
[ I May Upload Something Someday ]

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

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.

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?

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.

___________________
"We live in a primitive time, don't we? Neither savage nor wise."
Team Techno™
AMP Featured Artist Nominations have started

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.

drop an ant and a buick, see what happens

___________________
Get Killed.
Get Noticed.
Keine Schoenheit Ohne Gefahr

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!'