Recent content by mimi.janson

Ok i meant mmole and nmole. However did i understand it right, the way to solve it?

Homework Statement Hi i need to just check if i have understood this. The problem statement is that i need to find out what [OH-] is in micromolar/L and nanomolar/L for pH 6 Homework Equations The equation I am using is that 10pH-14 The Attempt at a Solution My attempt was using the pH i was...

Homework Statement Hi i need to use V'(h) to find out how many liter of water are used when the water falls 1 cm c) from 100 to 99 cm Homework Equations I know that V'(h)=(∏*(h2)+212,6/6)+(∏*h2)/3 The Attempt at a Solution I know that i need to solve the differential...

Homework Statement Hi I have a question about integrating to find the volume of a sphere but before that i need to tell all other results i got or it will not make sence. 1. I needed to show how you get the formula for finding the volume of a sphere by the help of a cirkle with radius r . I...

so if i divided -10 by -10 it would also be the right and same result?

I said the 10th root of 200/10...but i know its wrong now...i just tried again and got a = 0,741 isn't that right and b=2,3? I know i might be irritating because i keep asking and i really don't hope I am bothering you too much but i really still don't get the exponent rule you used last...

i don't get how you go from a-10 to -1/10 ? how do you get the 1 ? ok so i got the 10th root of 20 to be 1,349 and i put it in the expression for b so 200/1,349-15=1,783*104 and 10/1,349-5=44,675 but this shows i did something wrong since my two attempts at finding b...

well I am not sure about how to use the logarithm, but i tried solving it with a program that we also use, and what do i do if i get 5 relsults put in a parensesis and under each other 0 0 1,075 -0,538+0,93li (i don't know what li strands for) -0,538-0,93li i believe i should use...

then i say -15 + 5 which would be -10? but you know its the - infront of 10 that's bugging me...because it can't be a minus since i have to take the square root of it later

that would be a-75? so then i solve a 200=10*a-75 a=-75th √(200/10) but is there not a rule saying that i cannot take the -xsquaroot of something and i have -75? and should i also keep going and find b like or does one thing need to be undefined to have a function?

thank youu but sorry i cannot see on which step of the ones i have to do it but is it right if i think what you are telling me is what happens in the third last of my steps? 200*a-5*a5 =10*a-15*a5?? but i don't know how to solve it when it is written like this

Homework Statement Hi I need to determine ragulatory for f, where the expiration time is measured as the function of the temperature. The function type is f(t)=b*at i get two pair of datas which are that for -15 °C the expiration day will be after 200 and by -5 ° the expiration...

so you mean i just have to isolate x in the circle by putting 2x-5 in the place of y and then find x? i just did and it says 5 over 2.6 ...thats not right it should be 4,4

but that is also what the formula i had shows. it shows you the distance between the centre of the circle and the line. Then you will know if that distance is bigger than the radius it doesn't intersect the circle if its smaller than the radius it means it does intersect it two times and if it...

sorry i am not sure if i understand what you mean with what point i should plug in if you mean what i think i should write in the formula then i believe it is G =l -2*7+0*1+5 l/√a-2+02 but that just comes out wrong for a reason. with asking if i know how to compute the answer if it...