hey guys, i'm in the middle for revising for a dynamics paper in January. I'm in the middle of a 1st year BSc Physics degree. Looking through some past papers, there are questions that i can do, and there are questions that i am unable to do. These are usually question where you have to derive...
hey guys, just wanted to know, in the graph of the OTTO cycle in the link
are stage (2-3) and (1-4) adiabatic or not, if so why are they
the reason i ask is that i have a graph showing that these stages are...
are these dimensional analysis questions correct
A = area
V = volume
v = speed
p = density
1. VA / v = L3 L2 L-1 T-1 = L4T-1
2. V2/3 A = (LT-1)2/3 L2 = L2/3 T-2/3 x L2 = L10/3T-2/3
3. 3A3 + 2V2 = A3 = L6
V2 = (L/T)2 = L2T-2 = L4T-2
are these correct
a gas contains 2 kinds of atoms 4x105atoms of type A and 8x105 atoms of type B. it is known that the mass of type A atoms is 5x10-26kg and the mass of the gas is 2.8x10-20kg. what is the mass of type B atom?
2.8x10-20kg - 5x10-26kg = 2.8x10-20kg - 0.00005x10-20 = 2.799995x10-20kg...
A substance consists of equal numbers of tow kinds of atoms, with masses m1 and m2 respectively.
a) what is the mass of the substance is 2x106 atoms of each kind are present, where m1 = 3.4x10-26kg and m2 = 1.6x10-26kg?
3.4x10-26kg + 1.6x10-26kg = 5x10-26 x 2x106 =...
if u wana find the frequency, which is the number of cycles per second, find out how many breaths u take in 1 sec and put it in2 the formula, it is basic conversion thats all, it is easier that you think, just stop thinking "complicated", think basic :) hope this helps :)
how do i go about answering this question guys, send me in the right direction please :)
"when a diode allows a positive current to flow it has a resistance of 0.5kohms. It does not allow negative flow, i.e. the resistance is infinate. using ohms law, sketch a graph of current I against...
hey guys, i can see where u are coming from, i spend an hour or 2 just going through questions and found that if you know the formula for of something for example (Force) = m x a, then is is just stripping it down to its most basic units, m = M and being that a = change in velocity per unit time...
i need help with the following quesitons;
a) log_3 27x^2
b) ln (x^2 / y^2)
c) ln (xe^x)
d) log (2x + 3y)
i dont mind if you could direct me in the right direction and i will do my best to go from there :)
USING THE RULES FOR LOGS, SPLIT THE FOLLOWING UP INTO SEPERATE...
hey guys, i have a question, then i will show my solution, is there any chance you guys could help me find an easier way to get to the answer, cheers
log_a (yx) = log_a (y) + log_a (x)
log_3 (3) + log_3 (x)
log_a (y) = x -> y = a^x -> log_a (a) = 1...
it is suspected that cells in a sample are dividing so that the number of cells present at any one time t (measured in seconds) is growing exponentially according to the relationship y = 64 x 2^2t. it would be hard to check this relationship accurately by plotting measurements of y against t, so...
hey guys, i was wondering if you guys could help me with a few things.
1st, how to work out dimensional formulae questions, i can not get my heard around it, and im sure with some help i can nail it,
how do u give the dimensions for ENERGY
give the dimensions of the...