EWriter Forum
Physics
Posted by Kuzwayo
I would like to know how are black holes created and can they be destroyed.
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Answered by Pending
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Physics
Posted by M.Bradley
✓How to master physics questions based on Newton's and work energy .is there any difference between the two ?
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Yes, a major difference indeed!
Please click on the Physical Science link from the homepage, and go to those specific topics. You can contact me directly by direct message from the My Messages section. Look for my name.
Answered by V. Gokal
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Social Science
Posted by BAHATI
discus are the roles of mass media in kenya today?
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Answered by Pending
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Mathematics
Posted by M.Bradley
✓Help me factorise this equation 2cos^2+4sinxcosx+1=0
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Hi
This is answered by a colleague, Mr. S. Deonarain.
Please contact us for any inappropriate content.
Answered by V. Gokal
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Physics
Posted by Abigail
✓Does vapour pressure affect dynamic equilibrium.Explain fully
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yes,according to the Le chatelier's principles,the equilibrium will move(change the position)in order to withstand/reduce the pressure in the system.example,in this case of having more molecules on the right hand side than on the left side,increasing pressure will cause the equestion to move to the left side to balance the pressure molecule and vice-versa
Answered by enock apwoka
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Life Sciences
Posted by M.Bradley
✓What is the influence of isolating mechanisms?
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Isolating mechanism is a form of sympatric speciation. (Formation of a new species due to a mechanism of reproductive isolation). This does not allow for the reproduction bet diff species to take place due to: Temporal isolation, courtship behaviour, Adaptations to different Pollinating Agents, prevention of fertilisation because of diff copulatory organs and hybrid infertility.
PS: will email you more info on it, if I have your email address???
Answered by Madam Eve
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Mathematics
Posted by NOEL
What are some of the basics to approach a hyperbola and parabola function given the graphs drawn in the same axes?
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Answered by Pending
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Physics
Posted by Mohamed Abbas
✓Hi Mr gokal.....what's your WhatsApp number
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Hi
Cannot put it here.
Email me.
Address is at bottom of your worksheets.
:-)
Please contact us for any inappropriate content.
Answered by V. Gokal
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Physics
Posted by Hussain Basha
✓What are a few examples of Action-reaction pairs and what are the properties of action-reaction pairs? Thanks
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The forces are of the same magnitude, act in opposite directions on different objects.
Since they act on different objects, they obviously cannot cancel out.
Every force has a reaction force, which is sometimes not very obvious.
Easy examples:
rocket taking off -
rocket applies force on gas, and gas applies force on rocket.
(rocket and gas takes off in opposite directions!)
firing a gun -
gun applies force on bullet, and bullet applies force on gun (hence gun recoils)
(bullet and gun takes off in opposite directions)
(this can get a little complex if you start thinking about the compression gases, but this is an ok explanation)
Answered by V. Gokal
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Physics
Posted by nthabi
✓an unknown mass x of sodium carbonate is dissolved in a 200 cubic centimetres of distilled water. in a titration15 cubic centimetres of the solution was used to neutralise 24 cubic centimetres to neutralise 24 cubic centimetres if a 0.12 mol.dm3 hydrochloric acid solution.1. determine the concentration of sodium chloride solution?2. calculate the unknown mass x?3. what is the appropriate indicator for the solution.
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1.
sodium chloride concentration? You sure? (0,07 mol.dm-3)
2.
2,0352g
3.
strong acid + weak base
indicator = methyl orange
(i will check with the developers if images can be allowed here. Then I will upload my full solution.)
Answered by V. Gokal
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Mathematics
Posted by tebatso
✓is zero a number? If zero is a number why they say that any number to the exponent zero is one, but when you use zero to the exponent zero it gives you error?
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This is a very long explanation!
Regarded as indeterminate.
Google it. You get some crazy explanations!
Answered by V. Gokal
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Physics
Posted by karin H kelder,Derick Govender and Jagathesan Govender
✓Explain briefly hw doppler effect functions nd what it may be used for?
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example:
If a car approaches with a siren on, each new pulse from the siren has a shorter and shorter distance to travel to reach you (the car is getting closer to you). This creates a higher frequency of pulses for the listener. Hence a higher frequency is heard.
Uses include:
1) to measure the rate of blood flow
2) or the heartbeat of a foetus in the womb
3) speed traps (radar type)
4) used to measure the speed at which stars and galaxies are approaching or receding from us
Answered by V. Gokal
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Mathematics
Posted by Faaizah Kader
✓Some take pi as 22/7 which will be termed a rational number. Some take it as 3.14.... non-recurring or non-terminating. That be irrational.Question to anybody interested in answering: What do we classify pi as??? Which value do we introduce from point of initiating it's use?P.N: Grades 8 and 9 learners do not use programmable calculators that have the pi button.
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Pi is rational. An answer to my own question.
Answered by Faaizah Kader
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Physics
Posted by V. Gokal
To use DualView .... preferred browsers 1) Chrome (all OS) 2) Edge (Windows 10)
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Answered by Pending
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Business Studies
Posted by Lubbe
Greetings may it be possible for the business studies teachers to post some tests for the learners to engage in as it may benefit us?
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Answered by Pending
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History
Posted by Elder Etieneobong Ekereuke
✓Who was the First National President of The Apostolic Church Nigeria?
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D.P. Williams
https://en.wikipedia.org/wiki/The_Apostolic_Church_Nigeria
Please be aware of malicious links that may be posted, the full adress name is pasted here for you to see.
Answered by K Naicker
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Chemistry
Posted by Az. Khan
✓What is the ester used to give the smell of icecream ?🍦
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Vanillin-a flavouring agent
Answered by Phyllistar
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Chemistry
Posted by shubham
✓demo
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Hi!
Demo answer.
Answered by V. Gokal
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Physics
Posted by Shankar
✓What is a "retarding force"? I've seen this in a couple of past year papers and was not sure what they meant. They mostly asked it like :" Find the retarding force... "
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A retarding force is a force that is opposing the motion of the object.
A good example would be friction force.
Answered by V. Gokal
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Physics
Posted by Vilashni
✓when working withthe mechanical energy formulae , how do you kmow when to indicate potential energy as zero?
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The "h" is zero.
Or there is no height h in the question.
Answered by V. Gokal
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Accounting
Posted by Jaya Gupta
✓question by jaya account
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testing answers by another account
Answered by Honey Gupta
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Business Studies
Posted by Jaya Gupta
✓dfgdfgdf fgdfgfg dfgfgdfgdf
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hello this is my answer corrected my jaya account
google.com
Please be aware of malicious links that may be posted, the full adress name is pasted here for you to see.
Answered by Honey Gupta
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Accounting
Posted by Jaya Gupta
✓what is account?
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account is a subject
Answered by Jaya Gupta
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Posted by Meloshnee
✓What is the motor effect
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The motor effect occurs when a current carrying conductor experiences a force in the presence of a magnetic field.
Answered by V. Gokal
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Physics
Posted by Suvan Naidu
✓What does effective resistance mean ?
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Effective resistance is also called total resistance.
But be careful since a question can ask for the effective resistance (total resistance) of just a parallel section of an entire big circuit. The you calculate just for that parallel.
Answered by V. Gokal
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Posted by ahmedsetar
✓when drawing graphs in electrodynamics for ac or dc (current and voltage). ..should we write a zero on the graph?. ..my teacher said not to
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Zero is written at the origin. Not elsewhere.
You can find such examples in CatView.
Answered by V. Gokal
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Physics
Posted by ahmedsetar
✓in electricity when asked "what does an emf of 12V mean" how do u explain it in terms of joules per coulomb ?
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12J of energy are transferred to (work done on) each coulomb of charge (per C) charge passing through the battery
(Nov 2013)
V = W/Q
Answered by V. Gokal
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Physics
Posted by Y.Jaglal
✓Hey E-forum!:)
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Hey there!
Answered by V. Gokal
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Physical Science
Posted by Meloshnee
✓What is dynamic equilibrium?
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The rate of the forward reaction equals to the rate of the reverse reaction. (The reaction rates have not stopped, just equalised.)
Answered by V. Gokal
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Answered by nokwanda magwenyana
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Physical Science
Posted by Kershlyn
✓Test
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Thank you, Kershlyn.
Answered by V. Gokal
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Physical Science
Posted by V. Gokal
✓Hi.Testing the Forum.
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Hello
Answered by Kershlyn
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