Recent content by faisal

if my methods are correcct why are all my answers wrong?

common guyz I'm dying

assistance required for following please 3 questions that have driven me up the wall Homework Statement 0.5km2 is the same area as a)5x10*6m2 b)5x10*12mm2 c)5x10*9cm2 d)5x10*13mm2 Homework Equations 10*6m=1km2 The Attempt at a Solution 0.5x10*6= 500,000 the answer is a) i...

sir i'd like to know a step by step approch to tackle this question, can you please provide one thank you

Homework Statement (* to the power of) 20m3 equals to a)2x10-8km3 b)2x10*6cm3 c)2x10*5dm3 d)2x19*9mm3 Homework Equations ok 1000m=1km so 1km3 is equal to 1000x1000x1000=10*9 so 10*9/20m3=50,000,000 1km3/50x10*6=20 from here I'm confused ........ The Attempt at a Solution...

can potato skin affect the rate at which catalase in potato discs breaks down hydrogen peroxide? does potato skin contain the polysacharide cellulose?

Hello, how can large variation between sets of different Ph results be scientifically explained, i am investigating the effects of Ph on enzyme activity, there are small error bars in my results between ph1,2,3,4 &5 however there is larger error bars between ph-6,7,8,9 & 10. there's an...

thanx for the info, i have another question how does the mass of the substrate affect the rate of the reaction? whats the advantage of meassuring the volume of gas released from the rate of a reaction to +/-0.1cm3?

hello every 1, i have a few questions -i'd like to know what error bars are & how did i plot them on a graph? -can some one please give me a scintific explanation to why small drops of substrate are introduced into a enzyme when trying to find its activity, all i know is that if all the...

a 1 tailed and 2 tailed hypothesis ?? a 1 tailed and 2 tailed hypothesis can some 1 provide me an example of a 1 tailed and 2 tailed hypothesis thank you What IS A Wilcoxson test, Manny whitney, Sign Test & chi squared test

quick question WOULD high melting points and boiling points be a property of petrolium aka crude oil.

When your increase the concentration do you increase the yield of products? And if you increase temperature will the system oppose this change and reduce the temperature applying le-chitaliers principle, and how much yield would you get if temperature is increased/reduced?

i DONT understand this example given to me q.1 A 9v battery with an internal resisrance of 0.1 ohms is connected to a 3 ohm resistance. What current flows across the circuit and what is the P.D. across the terminals of the battery E=I(R+r) I=E/(R+r) answer 2.9A (i understand this part) PD...

I Still don't understand here's my answer a)2/9.5=0.2 amps b)0.2X 9.5= 1.9v (V=IR)

A battery of e.m.f. 4.5V is connected across a 12 ohm resistor, if the Pd. Across the resistor is 3V calculate a)the current in the circuit ? b)internal resistance of the battery? iv tried my best but i can't do it