Recent content by zell_D

when light goes from a less dense media to a more dense media (air to glass), it is refracted. if its a glass slab, it will be refracted again as it exits the slab. S = lateral displacement of the incidence ray. t = the width of the slab, theta 1 is the angle of incidence while theta 2 is the...

my book is only introductory and they only gave me the equation S = t*sin( theta1 -theta2)/cos(theta2), i like to know how its derived so i can better understand and memorize this... i know i can probably work this out myself but i don't know where to start i am assuming it has something to...

bump :X

in class today, we hit a tuning fork and tried to match it with a humming. now what I Want to know is that is this even possible? we tried a lot of times and tried to produce a sine wave but failed horribly. although at the max amplitude, the frequency of our hum matched with that of the tuning...

edited, but do things seem right or are they wrong 2b and 3a, b are the ones I am not sure on

Homework Statement see question 2a, b Homework Equations a) v=f(wavelength) b) v= sqrt(F/(m/L)) The Attempt at a Solution a) f=2.5 Hz, t=1.0 s and one wavelength on the graph is I guess 0.4 m? v=2.5(.4)=1 m/s b) f=5.0 Hz, tension same v= sqrt(F/(m/L)) means that a change in frequency will not...

only thing i can guess is that the book is wrong, the number substitution proves this

i did: its 14m6n2 / 2mn and the answer being 7m5n

i know with the same base i can reduce, but i don't get 7m5n

ok so then i do not know how i would arrive at the right answer: 14m6n2 / 2mn i know what the right answer is, and i know how they did it. but i can't seem to grasp the reasoning PS: the answer is 7m5n I was under the impression that you can only subtract the powers through the same base...

I haven't been taking math for 3 years so I have a question about the following: is 14m6n2 the same as 2mn x 7m5n basically asking this because I am not sure whether or not I can factor the terms out like this if this information is insufficient I can post the whole problem. Thanks in advance.

how would i measure it though without a measuring tool? and estimating/eyeballing it wouldn't give me an answer to separate the two answers within the 70's.

the possible answers are very apart other than two of the answers. one of which contains the right answer, one around 71.6 (the right answer) and hte other 79.3 or close to those numbers.

well this is on a KaplanDAT practice problem and i can't get it. and they don't explain it either so i don't know lol

I have basically arrived at the answer of arctan(3) = theta, but the thing is, we are not allowed to use a calculator and the choices are numbers with decimals. I have no idea how to estimate these things, is this even possible?