# Posts by Newton

Total # Posts: 18

**physics**

In an experiment to estimate the diameter of an oil molecule,an oil drop of diameter 0.05cm spreads over a circular patch whose diameter is 20cm. ¡)determine the volume of the oil drop.

**calculus.can you help me on these as well@sir collins**

thanks you

**calculus.can you help me on these as well@sir collins**

integrate sin^7xdx

**calculus thank you very much@sircollins**

thank you very much sir collins

**calculus very hard help**

integrate:cos^10xdx even with the previous hint a tutor here gave me i still don,t know it

**calculus help**

integrate cos^10xdx.. .plz show working i really wanna learn these thanks anyway

**maths plz help!!**

A hose ejects water at 80cl/s through a hole 2mm in diameter.the water implinge a wall and drop off without rebounding.what is the force on the wall? working plz thanks

**maths help!**

find the mass of the earth assuming the radius is 6400km

**Chemistry**

A mixture of powdered carbon and an oxide of lead was heated producing lead metal and carbon dioxide.when 13.70g of the lead oxide was reduced to lead by carbon,960cm^3 of carbon dioxide measured at r.t.p was formed. Calculate the empirical formular of the lead oxide???

**Chemistry**

A student was asked to prepare a sample of copper(ii)sulphate crystals(CUSO4.5H2O) given 5g of of copper (ii)oxide (CUO) as the starting material.if 10g of dry crystals of CUSO4.5H2O were obtained,calculate the percentage yield???

**Trigonometry**

First start by converting the angle in radians to degrees, hence will have Sin(90-x)=cos x =sin90cosx-cos90sinx, sin 90=1 and cos 90=0 =1(cos x)- 0(sin x) =cos x (proved)

**physics**

the volume v of a sphere of radius r is given by v=4/3pie r^3 what is the fractional change in v for a fractional change in r

**math place value**

how many tens if there were no hundred dollars for eg:200=what?

**math**

how many tens if there were no hundred dollars?

**programming**

Declare a string variable name myName

**Java progamming 1**

I want the program to ask for and get the price of a book from a user. The program will then multiply the price by 7% sales tax and display both the sales tax and final price of the book (price + sales tax) on the screen. using Netbeans

**physics**

what is an e.m.f

**Physics**

2. On the inside of an airplane the air pressure is about 85% of the atmospheric pressure at sea-level while outside, when it is cruising, the pressure is about 25% of the sealevel atmospheric pressure. If a window is 0.46 m in diameter, what is the net outward force on the ...