Which of the following are most affected by changing
the surface area of an object?
Weight
Drag
Force
Inertia
density
Which of the following is most affected by a change
in volume?
Weight
Density
Air
Resistance
Heat
loss
Why does an elephant have big ears?
To
swat flies!
To
balance his tail.
To
balance his trunk
To
cool off
A "Mad Scientist" gives you a chemical that makes
you proportionally increase in size by a factor of 3 (all dimensions increase
times 3). Which of the following are true?
Your
surface area increases by a factor of 6.
Your
surface area increases by a factor of 9.
Your
volume increases by a factor of 9.
Your
volume increases by a factor of 27.
If a person is scaled up on all dimensions by
a factor of 3, then your bones will have a strength that is
the
same
3
times stronger
9
times stronger
27
times stronger
For a giant (scaled up by a factor of 3), one
of the problems that such a big person would have is that
The
bones ( 9 times as strong) have to support weight that is 27 times as
much!
The
bones ( 3 times as strong) have to support weight that is 6 times as
much!
The
bones ( 3 times as strong) have to support weight that is 27 times as
much!
The
bones will be too long to support much weight.
In the movies, we often see where people shrink
to a small size due to some magical potion or type of radiation. Which
of the following would be true if you were to shrink to a scaled person
1/10 your size.
Your
bones would be 1/10 as strong
Your
bones would be 1/100 as strong
Your
weight would be 1/100 as much.
Your
weight would be 1/1000 as much.
If people were to shrink to a small size due to
some magical potion or type of radiation. What would be true about such
small people.
They
would have trouble jumping because of their weight.
They
would have less air resistance (porportional to weight) than a normal
sized person!
They
would be very strong for their size because their ratio of weight to
bone strength has decreased!
They
would be very strong for their size because their ratio of weight to
bone strength has increased!
We lose heat through
surface
area
bone
length
volume
hair
folicules
Which of the following would be true about nanoparticles?
Gravity
does not greatly affect them.
They
have a large surface area (proportionally) for chemical reactions.