Random Facts That Should Be Memorized

[TheBoneDoctah]

Let's post random facts and calculations that would help with speed on this exam.

For example, it's good to memorize that cos 30 and sin 60 = .87 as it will help you to move through kinematics problems quicker.

Also, square root of 2 =1.4 since it comes up a lot.

If anyone has any other calculations that they have come across a lot in their studying, post em here!

---

Members don't see this ad.

 

[madmuttal]

log 2=0.3
log 3=0.47

 

[BeancheBlanco]

manholes are circular because that's the only shape that will prevent the cover from falling through the hole, no matter what orientation it is in.

 

[TheBoneDoctah]

manholes are circular because that's the only shape that will prevent the cover from falling through the hole, no matter what orientation it is in.

Huh?

 

[Sean Lee]

Huh?

What if you encounter the same line of reasoning on the MCAT verbal and asked to answer what it means?

I am pretty sure "Huh?" isn't going to be one of the answer choices.

 

[TheBoneDoctah]

Is anyone else going to contribute?

 

[petyr_baelish]

sin 15 = 0.26
cos 15 = 0.97

sin 30 = 0.5
cos 30 = 0.86

sin 45 = 0.71
cos 45 = 0.71
tan 45 = 1

sin 0 = 0
cos 0 = 1

 

[gettheleadout]

Is anyone else going to contribute?

I memorized the squares up to 25: 12^2 = 144 and so on to 25^2 = 625

 

[BeachBlondie]

For conservation of energy problems, the velocity of an object is:

v=√2gh

Saves a little time.

 

[TheBoneDoctah]

For conservation of energy problems, the velocity of an object is:

v=√2gh

Saves a little time.

Good one

 

[jcb123]

coefficient of static friction= tan x

(idk how common object on a slope problems are but this is one of my fave time saving equations)

 

[Blueprint MCAT Tutor]

If X, then Y implies if Not Y, then Not X but does not imply If Not X then Not Y.

Believe it or not that ^^^^^ seems to come up pretty often when reasoning your way through bio experiment passages and verbal reasoning

 

[TheBoneDoctah]

coefficient of static friction= tan x

(idk how common object on a slope problems are but this is one of my fave time saving equations)

Can you explain this one please?

 

[jcb123]

Can you explain this one please?

Yeah
Here's a pic that explains it better than I can. It's pretty much a simplification of how u would normally solve this. But a super quick shortcut

http://hyperphysics.phy-astr.gsu.edu/hbase/imgmec/frictcoef.gif

 

[TheBoneDoctah]

Yeah
Here's a pic that explains it better than I can. It's pretty much a simplification of how u would normally solve this. But a super quick shortcut

http://hyperphysics.phy-astr.gsu.edu/hbase/imgmec/frictcoef.gif

Ohhhh got it. Thank u

 

[orangeblue]

ICE is less dense than water;
water is the only compound whose solid form is actually more expansive/has more volume than its liquid form

 

[orangeblue]

amide, amine, ester, ether, ketone.....the shapes of these guys

 

[ipmed]

manholes are circular because that's the only shape that will prevent the cover from falling through the hole, no matter what orientation it is in.

Her is my reasoning: A circle is the only shape for which the diameter is always the same ( remember a straight line between any two points on a circle is always the same length) and all other shapes have diameters or sides that are of varying length. Thus a circle has no side (obviously) and no diameter that is less than the any other diameter.

 

[Blueprint MCAT Tutor]

ICE is less dense than water;
water is the only compound whose solid form is actually more expansive/has more volume than its liquid form

Close but "only" doesn't fit. Per Wikipedia: "Other substances that expand on freezing are silicon, gallium, germanium, antimony, bismuth,plutonium and also chemical compounds that form spacious crystal lattices with tetrahedral coordination."

http://en.wikipedia.org/wiki/Properties_of_water#Density_of_water_and_ice

 

[TheBoneDoctah]

Close but "only" doesn't fit. Per Wikipedia: "Other substances that expand on freezing are silicon, gallium, germanium, antimony, bismuth,plutonium and also chemical compounds that form spacious crystal lattices with tetrahedral coordination."

http://en.wikipedia.org/wiki/Properties_of_water#Density_of_water_and_ice

Interesting. Wasn't aware
Of this