Saturday

February 13, 2016
Total # Posts: 119

**physics**

what are the dangers of radioactive isotopes?
*February 7, 2016*

**life science**

I need to know hw cn i use examples to ,describe predation,competition and symbiosis,explaining how each interaction influences the population size of the organisms involved.
*October 16, 2015*

**life science**

Organisms involved
*October 16, 2015*

**life science**

Using examples,describe predation,competition and symbiosis,explaining how each interaction influences the population size of the organisms involed.
*October 16, 2015*

**izazi**

identify four environment issues that cause ill-healht to the community
*September 7, 2015*

**math help please**

Find the area of the Rectangel. . 7x+1 ------------- | |8x | | | | ------------- A.15x+1 B.56x^2+8x C.56x+8 D.15x^2+9x I don't know what to do please help me. I don't understand.
*May 13, 2015*

**math help please**

Thank you😂
*May 13, 2015*

**math**

Find the product. (2x)(10x) A.20x B.12x C.20x^2 D.-5x Is the answer A?? Thanks
*May 13, 2015*

**math**

Thank you so much.
*May 12, 2015*

**math**

Write the expression using a single exponent. 2^2*2^8 A.4^10 B.2^10 C.4^16 D.4^16 Is the answer C??
*May 12, 2015*

**math help please**

So it's C then? Thank you😀
*May 12, 2015*

**math help please**

How many terms are in the following polynomial? 6x^4+3x^3-2x^2+15x-14 A.5 B.4 C.3 D.2 Is the answer A??
*May 12, 2015*

**math**

Find the degree of-5w^3-4w^2+7w+16 A.-5 B.16 C.14 D.3 I don't know how to do this you please help me? Thank you
*May 11, 2015*

**geometry**

Draw an equilateral triangle ABC with side length 4cm to scale and then draw dotted lines to show all axes of symmetry of this triangle
*April 14, 2015*

**Math**

144=Length
*January 29, 2015*

**Math**

144=Length
*January 29, 2015*

**SCIENCE**

From the following data ,calculate the percentage of KCl in sample of chloride weight of the sample 0.1865, volume of AgNOS required 26.50mL and Ag of AgNO3 =0.008700gram
*January 16, 2015*

**SCIENCE**

ALuminum can be determined gravimetricaly by the reaction with solution of 8-hydroxyquinoline (C9H7NO3).The net ionic equation . A mass of 0.1248g of Al(C9H6NO)3 WAS obtained by precipitating all of the the Al3+ from a solution prepared by dissolving 1.8571g of a mineral. what...
*January 15, 2015*

**GEOMETRY**

write the following composition as one translation: T3,5 0 T4,-4
*December 8, 2014*

**Chemistry**

what PH would mark the end-point of a weak acid having a ka value of 0.000005 assume the salt formed to be at a molar concentration of 0.05 at the end
*August 3, 2014*

**algebra**

Twice the first number is eleven more than the sum of the other two numbers. The sum of twice the first number and three times the third number is one more than the second number. The second number is equal to the sum of the first number and the third number. Find the three ...
*June 17, 2014*

**math**

What is the area of a parallelogram where the base= 3x+1 and the height= 9. I know the area is base*height but does that mean you distribute the 9?
*May 9, 2014*

**biochemistry**

The following data describe the binding of oxygen to human myoglobin at 37oC. P02 (mm Hg) = 0.5 1 2 3 4 Theta = .161 .277 .434 .535 .605 P02 (mm Hg) = 6 8 12 20 Theta = .697 .754 .821 .885 From these data, estimate: a). P50 b) the fraction saturation of myoglobin at 30 mm, the...
*November 7, 2013*

**math**

600,000=_______ten thousands
*October 23, 2013*

**math**

600,000=
*October 23, 2013*

**8th Grade Language Arts**

might be
*September 5, 2013*

**physics**

Car A negotiates a curve of 60 m radius at a constant speed of 50 km/h. When A passes the position shown, car B is 30 m from the intersection and is accelerating south toward the intersection at the rate of 1.5 m/s2. Determine the acceleration which A appears to have when ...
*April 14, 2013*

**Life orientation**

I want to know all 5 ways in which the human or environment Nutrition impacts on the community.
*March 18, 2013*

**Math**

Calculate the height of a triangle with base equal to 142cm and area equal to 62,48cm
*March 14, 2013*

**Math**

Calculate the area of a triangle with base equal to 18cm and height equal to 9cn
*March 14, 2013*

**Math**

Calculate the side lenght of square with area 25m
*March 14, 2013*

**math**

Calculate the breadth of a rectangle with lenght 120mm and area 960m
*March 14, 2013*

**math**

Calculate the breadth of a rectangle with lenght 120mm and area 960m
*March 14, 2013*

**math**

Calculate the lenght of a rectangle with area 350cm and breadth 50mm.
*March 14, 2013*

**life orientation**

1, Identify five practice that are in contravention of the basic conditions of employment ACT. 2,What according to the basic conditions of employment ACT applies with regard to the contravention that you have identify
*March 10, 2013*

**life orientation**

1, Identify five practice that are in contravention of the basic conditions of employment ACT. 2,What according to the basic conditions of employment ACT applies with regard to the contravention that you have identify
*March 10, 2013*

**Calculus**

F(x) = (x^3 - x + 1)^4 f'(x)=
*February 23, 2013*

**chemistry**

What's the equation written in a sentence for nh4no3(s)=n2o(g)+2h2o(g)
*December 16, 2012*

**algebra**

a piece of wire measuring 20 feet is attached to a telephone pole as a guy wire. the distance along the ground from the bottom of the pole to the end of the wire is 4 feet greater than the height where the wire is attached to the pole. how far up the pole does the guy wire reach?
*December 2, 2012*

**Calculus**

g(x)=5x^2+3x+2 Compose g(g) and find domain
*October 29, 2012*

**Business English**

Which of the following sentences is the refusal implied rather than directly stated
*October 21, 2012*

**math**

162.5 miles
*October 21, 2012*

**math**

Find n if S(sub n) is approximately 15,408.15.
*May 22, 2012*

**social health**

5 ways in which human problem impacts on community.and the relavent sources to support claims.
*May 11, 2012*

**life orientation**

identify and describe one environmental problem that causes ill health,accidents,crises,and disasters within south africa
*April 22, 2012*

**Life orientation**

how can i answer a question that i do not even know the answer
*April 21, 2012*

**Pre-Calc**

Fill in the blank; •In the process of polynomial division (Divisor)(Quotient)+_______=_______ •When a polynomial function f is divided by x-c, the remainder is _______. •If a function f, whose domain is all real numbers, is even and if 4 is a zero of f, then ...
*February 27, 2012*

**Pre-Calc**

Oh yes the first one was a typo it was supposed to be X^2+y^2+ax+by+c=0
*January 10, 2012*

**Pre-Calc**

True or False: •Every equation of the form X^2+y^2+ax+by+c=c •The radius of the circle x^2+y^2=9 is 3 •The center of the circle (X+3)^2+(y-2)^2=13 is (3,-2)
*January 10, 2012*

**Pre-Cal**

Find the distance d(P1,P2) between the points P1 and P2. P1= (-2,1); P2= (0,0) P1= (-1,1); P2= (2,2) P1= (-1,0); P2= (2,4) P1= (2,-3); P2= (4,2)
*January 8, 2012*

**pre-calc**

True or false: Perpendicular lines have slopes that are reciprocals of one another.
*January 8, 2012*

**pre-calc**

Two nonvertical lines have slopes m1 and m2, respectively. The lines are parallel if ___ and the ___ are unequal; the lines are perpendicular if ___.
*January 8, 2012*

**Math ( Word Problem )**

i lke math.
*October 25, 2011*

**CHEMISTRY**

A geologist discovered a new rock which he suspected contained an oxide of an element called mysterium. He gave thr ock to a chemist who ground it up and heated a sample with carbon at a high temperature. No metal was produced in this experiment. 1.Why did the chemist grind ...
*September 20, 2011*

**Chemistry !**

A geologist discovered a new rock which he suspected contained an oxide of an element called mysterium. He gave thr ock to a chemist who ground it up and heated a sample with carbon at a high temperature. No metal was produced in this experiment. 1.Why did the chemist grind up...
*September 20, 2011*

**MATH HELP**

Two functions g and h are defined as : g:x--> 2x+3/x-4 h:x --> 1/x Write expressions for : a) hg(x) b) g inverse 1(x)
*September 8, 2011*

**MATH HELP**

Two functions g and h are defined as : g:x--> 2x+3/x-4 h:x --> 1/x Write expressions for : a) hg(x)
*September 7, 2011*

**MATH**

Two functions g and h are defined as : g:x--> 2x+3/x-4 h:x --> 1/x Write expressions for : a) hg(x) b) g inverse 1(x)
*September 7, 2011*

**MATH**

MR. BOB PURSLEY HELP ?/
*September 7, 2011*

**MATH**

Two functions g and h are defined as : g:x--> 2x+3/x-4 h:x --> 1/x Write expressions for : a) hg(x) b) g inverse 1(x)
*September 7, 2011*

**MATH !!**

still dont understand how to combine this . can u show me ?
*September 7, 2011*

**MATH !!**

how to combine ?? thats wat i have problem withh ??
*September 7, 2011*

**MATH !!**

Given that f:x -->3-x g:x --> x+2/x-5 derive the expression for gf(x)
*September 7, 2011*

**MATH**

Given that f:x -->3-x g:x --> x+2/x-5 derive the expression for gf(x)
*September 7, 2011*

**Englist**

QUICKLY AND THOROUGHLY N DAILY ?
*September 7, 2011*

**Englist**

easily
*September 7, 2011*

**MATH**

Two functions g and h are defined as : g:x--> 2x+3/x-4 h:x --> 1/x Write expressions for : a) hg(x) b) g inverse 1(x)
*September 7, 2011*

**MATH**

how do u get the 3 ?
*September 7, 2011*

**MATH**

The function f and g are defined by : f:x --> 3x+1 g:x --> 9-x Determine the expression for the function gf(x) .
*September 7, 2011*

**Physics HELPP !!**

The antireflecting coating works best if its refractive index is the square root of the refractive index of the lens inthe eye glasses. a) determine the refractive index of the lens that gives the best results
*September 6, 2011*

**Physics**

How to find refractive index ?
*September 6, 2011*

**Physics**

How to find refracticive index ?
*September 6, 2011*

**MATH **

Ok when your plotting a graph of Sin angle i against Sin angle r , which of those goes on the y axix and which goes on x axis??
*September 6, 2011*

**Physics**

Ok when your plotting a graph of Sin angle i against Sin angle r , which of those goes on the y axix ??
*September 6, 2011*

**Technical Drawing**

1. Construct a triangle with dimension 5cm, 6cm and 75 degrees. 2. Construct a triangle with two sides 5cm, 6cm and an included angle of 120 degrees.
*July 29, 2011*

**Physics**

How much energy would your body need to provide for the following : a)sweating and evaporation of 1kg of water from your skin. b)heat loss by radiation at the rate of 100 wats for 12 hours. (the specific latent heat of vaporisation of water is 2.3MJkg-1)
*June 2, 2011*

**Physics**

An Electricity account shows that a household has used 1400 units of electrical energy during a three month period. Calculate : a)the number of joules of energy used in this time. b)the average number of joulesof energy used perday . c)the average power consumption in watts. d...
*June 2, 2011*

**Physics**

drwls here it is : How much energy would your body need to provide for the following : a)sweating and evaporation of 1kg of water from your skin. b)heat loss by radiation at the rate of 100 wats for 12 hours. (the specific latent heat of vaporisation of water is 2.3MJkg-1)
*June 1, 2011*

**Physics**

Can someone plz answer my 2 previous question ???
*June 1, 2011*

**Biology**

ThankYou Sra (:
*June 1, 2011*

**Biology**

Wha advantage could the following traits be to the organism ? a) Larger leaves b)Green Leaves c) More seeds d) Brightly coloured flowers
*June 1, 2011*

**Physics**

An Electricity account shows that a household has used 1400 units of electrical energy during a three month period. Calculate : a)the number of joules of energy used in this time. b)the average number of joulesof energy used perday . c)the average power consumption in watts. d...
*June 1, 2011*

**Physics**

How much energy would your body need to provide for the following : a)sweating and evaporation of 1kg of water from your skin. b)heat loss by radiation at the rate of 100 wats for 12 hours. (the specific latent heat of vaporisation of water is 2.3MJkg-1)
*June 1, 2011*

**Geometry**

A science lab needs a right circular cylindrical container that holds 15 gallons of liquid & is 24in tall. A reference manual states that 231 cubic inches is equivalent to one gallon. What is the approximate radius, in inches, or the container?
*April 5, 2011*

**Maths**

Okk ! SO I am not completly suree about this : The No. of overtime worked = the overtime wage / overtime rate :) Someone Plz Clarify
*March 23, 2011*

**programming**

How to integrate / combine two different programs together ??? :/
*March 23, 2011*

**English**

:) Well !!
*March 22, 2011*

**English**

Second one ! [I think] :)
*March 22, 2011*

**Physics**

lOl okk thenn :)
*March 22, 2011*

**Physics**

:D Thank Yoouu !!
*March 22, 2011*

**Physics**

What provides the centripetal force : i)on the elctron orbiting the proton in a hydrogen atom ii)satellite orbiting the planet iii)on the child being whirled round in a chair on the end of a chain in the fairground ride ? Ayuada por favorr :)
*March 22, 2011*

**science**

I am guessing its Friction :)
*March 22, 2011*

**Physics**

Why is it 200v ??Is the formula used : m1v2+m2v2=(m1+m2)v ??? Confusedd
*March 22, 2011*

**Physics**

A cannon of mass 200kg, fires a cannonball with a mass of 10kg. The cannon ball leaves the barrel of the cannon with a velocity of 60 m/s. Using the law of conservation of momentum , explain what happens to the cannon when the cannon ball is fired. (Answer should include ...
*March 22, 2011*

**Computer**

How to write an algorithm to find the fibonacci series ??? Help:/
*February 24, 2011*

**physics**

thanx
*February 23, 2011*

**physics**

Two planes of the same mass collide head-on and becomes tangled so that they move on together. If the engines of both were stopped at the moment of impact and the speeds of the planes at impact were 120m/s and 200 m/s, find the joint velocity immediately after collision.
*February 23, 2011*

**physics**

A railway track travelling along a level at 9 m/s collides with, and becoms coupled to a stationary truck. Find the velocity of the coupled trucks immediately after the collision if the stationary truck has a mass which is : A ) equal to the mass of the moving truck B) twice ...
*February 23, 2011*

**Physics**

Vector ~A has a magnitude of 7 and points in the positive x-direction. Vector ~B has a magnitude of 21 and makes an angle of 30â—¦ with the positive x-axis. What is the magnitude of ~A âˆ’ ~B ?
*September 6, 2010*