Posts by kem

Total # Posts: 29

Analytic geometry
Find the equation of set of all points P(x,y) that is twice as far from (-8,8) as from (-2,2).

physics help
The distance between the midponts of two metal balls.P and Q,respectively of masses 55 kg and 70 kg is 80 cm calculate the gravitational force that P exerts on Q7 (b)give only the magnitude of the force that Q exerts on P (c)if Q Is now replaced by a ball that 1/2 its ...

science chemistory
Limestone is mostly calcium carbonate(CaCO3.john wants to know how much calcium carbonate is in a sample of mass 3,5 g of limestone.to the limestone he then adds concentrated hydrochloric acid (HCl).the products that form are carbon dioxide (CO2),calcium chloride (CaCl2) and ...

science chemistory
CaCO3 2HCl forms CO2 CaCl2 H2O 1.calculate the molar mass of calcium chloride produce 2.calculate the number of moles of calcium carbonate 3.calculate the mass of calcium carbonate

physical science chemistry
Thanks i would be thankfull

physical science chemistry
Fill in the missing words Ionisation energy, water, melting point, electronegativity, non-polar, solvent, pair, boiling points, polar A covalent bond is formed when a 1________ of electrons is shared between the bonding atoms.when the electrons are shared equally,a 2_______ ...

trigonometry math help
If cos 20=m determine the values of the following in terms of m. (a)sin 250 (b)sin 20 thanks

math trigonometry
Simplify cos180*sin225*cos80/sin170*tan135

math
F(x)=-(x+1)^2+4 determine the nature of the roots

melissa
How did you find f1,f2 and f3?

math
It's 3x^2+kx-k=3k

math
3x^2 kx-k=3x

math
Its 3x^2 kx-k=3x prove that this equation has rational roots for all rational values of K.

math
3x^2 kx-k=3x prove that this equation has rational roots for all ration values of K thanks

physics
A rocket of mass 5 000 kg is launched upwards into the sky at an acceleration of 20 m.s^-2. (a) Calculate the magnitude (b) calculate the direction of the thrust of the rocket's engines thanks in advance

math
How did u get 24 11=35

math
After finding the differences how will i find the tenth term?

math
Yes i do

math
0,3,8,15,24 how do i calculate the tenth term

physics
A block of 25 is pulled horizontally on a rough surface by the force 120N.the coefficient of friction between the surface is 0.34 how do i calculate the accelation of the block

chemistry
How do i calculate a,b and c please help me

chemistry
Sorry My mistake it's 300m^3

chemistry
14g of lithium hydroxide dissolves in 500cm^3 of water.in titration ,300m7^3 is used to neutralise sulphuric acid of 0,2mol.dm^-3 how do i calculate (a)concentation of a base and calculate for (c)volume of the acid and (c)which mass of Alkaline was used thanks in advance.

Geography
What are the causes of the pressure belts

math
As a part of a unit on weather students recorded the outroor temperature at 8:30 AM what was the difference between the weeks highest and lowest morning temperatures

Math help NOW!!!!! Plz
How to solve by completely the square. X^2+18x+10=0

chemistry
A CUBIC PIECE OF METER MEASURES 3.00CM ON EACH EDGE. IF THE METAL IS NICKLE WHOSE DENSITY IS 8.90G/CM^3.WHAT IS THE MASS OF CUBE

english
Select the sentence that has correct pronoun usage. Julie plans to travel this summer with Oscar and me. Julie plans to travel this summer with Oscar and I.

physics
l=(T^2*g)/4 yapýcan