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precious Mlangeni (based at Not registered at a university)

General question question under Physics
Hy guys i need a physics and chemistry tutor and I'm going to rewrite so i need all the help I can get

November 17 2017, 10:15 am

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Nhlapo Mbuyiseni (based at Not registered at a university)

General question question under main group
Guys I need help on physics.... Drop your WhatsApp number if you're interested
NB:Girls only


October 30 2017, 6:27 pm

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Joshua (based at Other institution)

Hiv/aids vs Dogs question under main group
Can dogs get Hiv

May 1 2017, 3:56 am

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Ntokozo (based at University of KwaZulu-Natal)

General question question under Physics
What causes an object to float in water besides weight effect

April 27 2017, 8:03 am

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Jean Malik Harold Gouza (based at Not registered at a university)

Video's question under Physics
Sorri but none of the video's is playing...does anyone else have a problem with this or is it just me

April 19 2017, 4:41 pm

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Njabulo (based at )

Videos question under Physics
I tried to watch videos and they responde by " This is private video" help plz

March 9 2016, 3:07 pm

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Ramunenyiwa Thabelo (based at Not registered at a university)

about grade 11 question under main group
can you also discuss about grade 11 stuff's

October 2 2015, 5:36 pm

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Shanah Carlson (based at University of Witwatersrand)

Circular motion question under Physics
The circular motion of a particle in the x-y is given by the equations:
r(t)= 7.23m
Theta(t)= (6.33rad/s)t
Where r is the distance from the origin and Theta is the polar angle measure counterclockwise from the positive x-axis. Calculate the x-coordinate of the particle at time t=2.50s


April 15 2015, 9:03 am

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Shanah Carlson (based at University of Witwatersrand)

Checking question under main group
Did my question post?

April 15 2015, 8:51 am

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Shanah Carlson (based at University of Witwatersrand)

Tutorial workshops question under Physics
Are you guys going to organize tutorial workshops for Physics as well? They are extremely helpful for Maths.

April 15 2015, 8:41 am

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Tafadzwa Mudondiro (based at University of Witwatersrand)

General question question under Physics
an athlete runs 100m in 10.0 seconds. assume that he accelerates uniformly from rest for the 20m and then he runs at constant velocity for the remainder of the race. find the final velocity and the time taken accelerating

March 14 2013, 9:00 pm

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Onkarabile Tiro (based at University of Witwatersrand)

General question question under main group
When a 0.998g sample of CuSO4.xH20 was heated strongly,so that the waters of hydration were given off,the mass of the anhydrous salt remaining was found to be 0.638 g.What is the experimental value of the percent water of hydration?

April 21 2013, 10:15 pm

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Motaung Lebohang (based at University of Witwatersrand)

General question question under main group
Subject: Heat of mixingnnnHi Therenn[Sigurd Skogestad, page 113, question 4.7b].I ve tried this question at it is on the textbook,but i get a different answer,where am I going wrong? nn For the following assume the same initial temperatures before mixing.(20°C) a. Calculate the adiabatic temperature rise when we mix 0.5kg sulphuric acid with 1kg water. nYou are given the following information: nHeat of mixing = -96kJ/mol H2SO4nMolecular weight for the acid = 98.1g/mol Specific heat capacity of water= 4.18 kJ/kg K nnnnn Solutionsna. 500g =500/98.1 = 5.09 mol H2SO4 nn1kg = 1000/18 = 55.5 mol H2OnEnthalpy mix = -96*5.09 = -489.3 kJ/kg solution (used -96kJ/mol because mol of water >10) Temperature change = -489.3/4.18=117 K.nnTextbook answer is 72 K

April 21 2013, 9:55 am

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Previous questions

Hy guys i need a physics and chemistry tutor and I'm going to rewrite so i need all the help I can get...

Subject: Heat of mixingnnnHi Therenn[Sigurd Skogestad, page 113, question 4.7b].I ve tried this question at it is on the textbook,but i get a different answer,where am I going wrong? nn For the follow...

an athlete runs 100m in 10.0 seconds. assume that he accelerates uniformly from rest for the 20m and then he runs at constant velocity for the remainder of the race. find the final velocity and the ti...

The circular motion of a particle in the x-y is given by the equations: r(t)= 7.23m Theta(t)= (6.33rad/s)t Where r is the distance from the origin and Theta is the polar angle measure counterclockw...

I tried to watch videos and they responde by " This is private video" help plz...

When a 0.998g sample of CuSO4.xH20 was heated strongly,so that the waters of hydration were given off,the mass of the anhydrous salt remaining was found to be 0.638 g.What is the experimental value of...

Did my question post?...

can you also discuss about grade 11 stuff's...

Guys I need help on physics.... Drop your WhatsApp number if you're interested NB:Girls only...

Are you guys going to organize tutorial workshops for Physics as well? They are extremely helpful for Maths....

Sorri but none of the video's is playing...does anyone else have a problem with this or is it just me...

What causes an object to float in water besides weight effect...

Can dogs get Hiv...

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