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Questions (126)

A girl starts at A and walks 2km south to B.she then walks 3km west to C.find the distance and bearing of C from A.
1. 6 answers
2. asked by Gift
3. 2,285 views
A 10uf capacitor is charged from a 30v supply and then connected across an uncharged 50uf capacitor.Calculatea. The final
1. 5 answers
2. 19,073 views
How many moles of silver will be deposited from a silver (i) trioxonitrate (v) solution by 16.0g of copper (Ag=108,Cu=63.5)
1. 4 answers
2. asked by Gift
3. 1,702 views
A girls walks 12m northwards 5m eastwards and 7m southwards her total displacement is?
1. 5 answers
2. 2,398 views
the distance covered by a falling ball varies as the square of the time taken. If a ball falls through 1800m in
1. 4 answers
2. 913 views
The second term of a GP is 4, the fifth term is 81. Find the seventh term
1. 2 answers
2. 697 views
State whether each of the following will increase,decrease or unchange when catalyst is added to the reaction and give an
1. 2 answers
2. 523 views
By using the bond enthalpies and bond energies in thermochemical equations to calculate the reaction enthalpy of; H + Br=2HBr
1. 1 answer
2. 523 views
Use the bond enthalpies and bond energies in the data book in themochemical equations to calculate the reaction enthalpy of:
1. 2 answers
2. 548 views
Use the bond enthalpies and bond energies from the data book in themochemical equations to calculate the reaction enthalpy
1. 1 answer
2. 506 views
Standard enthapies of formation are not always like bond enthalpies.Explain
1. 1 answer
2. 801 views
Xenon is one of the noble gases, and is generally quite unreactive.in fact,it was long believed that all the noble gases were
1. 1 answer
2. 517 views
When water falls from the top of the waterfall,at the victoria falls in zimbabwe,the temperature of the water at the top is less
1. 2 answers
2. 571 views
a)Hydrogen has a much higher specific heat capacity than milk. What can you say about the specific heat capacity of
1. 2 answers
2. 517 views
A piece of metal has a density of 0.20g/cm^3.what is the volume in cm^3 of a 1g sample of a substance?
1. 1 answer
2. 396 views
Wrap a cotton wool around a thermometre,will its temperature rise? Explain your answer please
1. 3 answers
2. 361 views
What is the boiling and freezing points of celsius scale and kelvin
1. 2 answers
2. 753 views
Using the form of energy diagram,make a concept map of the two different methods of calculation of reaction enthalpy(via the
1. 2 answers
2. 1,039 views
Calculate using the enthaly of formation,the enthalpy of combustion of methanol,CH3OH
1. 3 answers
2. 1,588 views
Calculate the enthalpy of combustion of acetylene(per mol acetylene)using bond enthalpies and energy diagram
1. 2 answers
2. 546 views
Calculate the enthalpy of combustion of acetylene(per mol acetylene) using bond enthalpies and energy diagram
1. 1 answer
2. 1,075 views
Glycine is the amino acid used to make proteinsa)for each mole of glycine that burns,973.49k/mol of which is libarated eqution
1. 1 answer
2. 489 views
Calculate the pH of 0.0115M acetic acid solution at 25 degrees celcius with Ka = 1.75*10^-5
1. 1 answer
2. 483 views
Calculate the pH of 0.0115M acetic acid solution at 25 degrees celcius with Ka=1.75*10^-5
1. 3 answers
2. 424 views
Define the terms 'weak acid' and 'catenation'
1. 1 answer
2. 433 views
1)Define the term'geometric isomers'2)Give geometric isomers and corresponding names for the following condensed structural
1. 2 answers
2. 732 views
Write down (a) condensed and (b) skeletal structural formulas for isomers of an organic substance whose chemical formula has 5
1. 2 answers
2. 768 views
Skeletal structural formulas of pentane,2 methyl butane and 2,2 dimethyl propane
1. 2 answers
2. 617 views
Malaan is travelling from Makhado to Polokwane by taxi at a speed of 120km/h.A Nissan bakkie passes the taxi while it is on its
1. 3 answers
2. 419 views
The time required by workers to complete an assembly job has a mean of 50 minutes and a standard deviation of 8 minutes. To spot
1. 2 answers
2. 1,070 views
A car is moving at a constant velocity when it is involved in a collision.the car comes to rest after 0.45sec with an average
1. 1 answer
2. 854 views
Idemtify 3 enviromental health hazards that causes ill health,accidents,crises and disaster within a community in South Africa
1. 1 answer
2. 912 views
Pb3(ASO4)2.the solubility product expression
1. 3 answers
2. 891 views
Two force,3N and 4N act on a body in the direction due north and east respectively. Calculate their equilibrium?
1. 3 answers
2. 558 views
N=a+bT^2
1. 1 answer
2. 284 views
A researcher performs an experiment to test a hypothesis that involves the nutrients niacin and retinol. She feeds one group of
1. 2 answers
2. 977 views
A constant force of 40newton is applied tangentally to the rim of the wheel with 20cetimetre radius the wheel hs moment of
1. 2 answers
2. 485 views
Two chords in a circle are equal in lengh.The distances from the centre of the circle can be represented by x2 and 4x
1. 2 answers
2. 695 views
M varies directly as n andinversely as the square of p. Given that m=3 when n=2 and p=1, write down an equation connecting gmnp
1. 1 answer
2. 393 views
A 40degree Celsius thermometer reads 0.7degree Celsius at it boiling point of water. Evaluate the correct thermometerwhen it
1. 1 answer
2. 513 views
A bank charges 2 1/2% commission for issuing a bank draft. If a customer obtained a bank draft for #84,000 from the bank,
1. 5 answers
2. 732 views
The reproductive system of a male mammal is made up of... A. Claspers, prostrate gland, sperm duct and vas deference. B. Festis,
1. 6 answers
2. 692 views
What a....! The more you look, the less you see.A. Wonder B. Miracle C. Challenges D. Paradox
1. 4 answers
2. 544 views
The name given to program that is stored in the system or in a diskette is known as...A. Index B. Icon C. File name D. None of
1. 5 answers
2. 449 views
Which of the practices will lead to losses in electrical power transmission?A. Using transmission cables of large diameter B.
1. 3 answers
2. 595 views
Which of the following substances does not conduct electricity?A. Graphite B. Glass C. Sulphuric acid D. Table salt solution
1. 2 answers
2. 605 views
What are the two electronic structural conditions for the stability of an atom?
1. 1 answer
2. 427 views
The quantity is partly constant and partly varies inversely as the square of x. When w=1,x=11 and when w=2,x=5. Find the formula
1. 2 answers
2. 587 views
The quantity is partly constant and partly varies inversely as the square of x. When w=1,x=11 and when w=2,x=5 find the formula
1. 3 answers
2. 608 views
What is the formular of kenetic energy
1. 1 answer
2. 425 views
4 friends have 5 chocolates and they want to share equally.
1. 4 answers
2. 399 views
Calculate the linear expansivity ofbrass length 120m that assume two new length of 120.06m when heated through a temperature of
1. 1 answer
2. 431 views
The angle of elevation on the top of radio mask from a point due east of it and 96m away from the base is 30degree from another
1. 4 answers
2. 499 views
What is the balanced equation for the reaction between dilute tetraoxosulphate (vi) acid and sodium hydroxide solution
1. 4 answers
2. 1,489 views
What extent the government institution have currently supporting communities affected by human trafficking
1. 1 answer
2. 439 views
imagine you are the Senior prefect of your school .write a speech to be delivered at your morning assembly on the need for
1. 1 answer
2. 409 views
Evaluate the impact of risky behaviour on your personal expectations in relation to the career you want to follow
1. 1 answer
2. 487 views
Evaluate the impacts of risky behaviour on your personal expectations in relation to career you want to follow
1. 3 answers
2. 656 views
Evaluate and discuss the negative impact on your self and other
1. 1 answer
2. 177 views
Description of six risky situation to which our youth is frequently exposed to
1. 1 answer
2. 346 views
How to calculate the perimeter of the triangle given your answer to correct to the nearest metre
1. 1 answer
2. 152 views
determine the value of x and y for the sequence : 3;x;11;21;y
1. 2 answers
2. 181 views
A student eat a dinner containing 8.0 * 10 of energy. He wishes to do an equivalent amount of work in a nearby gym by lifting a
1. 1 answer
2. 257 views
How do i make x the subject formular in this equation a(x+b)=c
1. 1 answer
2. 195 views
A car five marked 15A and operates normally on a 12v battery calculate the resistors of the fuse wire
1. 4 answers
2. 254 views
2logₐx- 3logₐ2x + 2logₐx²
1. 2 answers
2. 66 views
How can I calculate the mass and volume of oxygen released when 29, 4 potassium chlorate discomposed to form potassium chloride
1. 1 answer
2. 162 views
The range of target is found to be 20km.A shell leaves a gun with a velocity of 500m/s. What must be the angle of elevation of
1. 1 answer
2. 112 views
Five important subjects that are related to home economic
1. 1 answer
2. 81 views
If the sum of a number is 3 times the other number given is 21, the product of two numbers is 30 find the number
1. 2 answers
2. 60 views
What are the two main characteristics of a shunt motor?
1. 1 answer
2. 106 views
What are the twomain characteristics of a series motor?
1. 1 answer
2. 94 views
Briefly explain overload and short circuit rating
1. 1 answer
2. 97 views
What are the ratings of a switchgear?
1. 1 answer
2. 86 views
Function of the carbon brushes
1. 1 answer
2. 120 views
Function of the brushes in DC motor
1. 1 answer
2. 117 views
Function of the brushes in Dc motor
1. 1 answer
2. 114 views
The Operation of a DC motor
1. 1 answer
2. 84 views
Fictions of a commutator in a dc machine
1. 1 answer
2. 74 views
Two functions of a commutator in a Dc machine
1. 1 answer
2. 77 views
Characteristics of a series motor
1. 1 answer
2. 83 views
Main characteristics of a series motor
1. 1 answer
2. 79 views
Main characteristics of shunt motor
1. 1 answer
2. 121 views
Differences between a shunt field coil and a series field winding
1. 3 answers
2. 107 views
In a shunt motor why do we have thin winding compete to that of a series motor
1. 1 answer
2. 89 views
If it happens we have a little current...what must we do to increase it?
1. 1 answer
2. 72 views
If we have a little current in a series motor what must we do to increase it?
1. 1 answer
2. 64 views
Function of a no volt relay coil
1. 1 answer
2. 83 views
Disadvantage of a separately excited generator
1. 1 answer
2. 131 views
Disadvantage of a series generator
1. 1 answer
2. 78 views
What must be kept in mind when using a shunt generator
1. 1 answer
2. 87 views
Advantages of a single phase transformers
1. 1 answer
2. 84 views
Why is the core in a transformer is laminated
1. 1 answer
2. 94 views
Functions of the magnetising and a core-loss components
1. 1 answer
2. 185 views
Operation of a contactor
1. 1 answer
2. 118 views
What is a day-night switch
1. 1 answer
2. 96 views
In what temperature should a Gel battery be stored
1. 1 answer
2. 80 views
Material of which the two electrodes of a lithium -ion battery is made of
1. 1 answer
2. 102 views
Purpose of a interpole
1. 1 answer
2. 115 views
Function of an interpole in a DC machine
1. 1 answer
2. 82 views

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