Monday
November 24, 2014

Posts by Precious


Total # Posts: 106

Chemistry
Please help.!!!!!
November 18, 2014

Chemistry
I mean the specific heat capacity of the material being measured and the material used is hot mineral oil which was transferred into the cold water in the calorimeter. For question 1, what Effect would be on the specific heat capacity of the oil if the calorimeter is not ...
November 18, 2014

Chemistry
1. What happens if our calorimeter is not properly insulated..what effect will it have on our calculated specific heat capacity I.e too large, too small or no effect....explain. 2. If our partner forgot to cover the coffee cup calorimeter while the temperature was being ...
November 18, 2014

scientist
I need 10 example objects that use energy in my house... What are they? Also can you help me?!!!!!!
October 29, 2014

Science Physics
Ok steve so I did 120(1.74x10^6)/(6.67x10^-11)(7.35x10^22)=2.300869565E19
October 9, 2014

Science Physics
On the surface of the Moon an astronaut has a weight of Fg = 120 N. The radius of the Moon is Rm = 1.74 x 106 m, the gravitational constant is G = 6.67 x 10-11 N m2kg2 and the mass of the Moon is Mm = 7.35 x 1022 kg. Solve numerically for the mass of the astronaut ma in kg
October 9, 2014

Industrial Psychological Research
what is the proportion of students with a raw score less than 10? if information was collected from fellow students the rating on a 5 point scale on 5 different questions. given a normally distributed population with a mean of 13, a standard deviation of 3, and 50 as the ...
September 23, 2014

chemistry
write half reaction for KMnO4 and (COMM)2 and balance the equation.calculate the atomic mass of M in14.0g/dm3 of solution
September 21, 2014

Physics
A box is sliding down a frictionless plane inclined at an angle of 30° width the horizontal. What is the acceleration of the box?
September 10, 2014

Edward Phatudi
Am doing physical science.life science.geography and maths lit i want to know which career can i do
July 2, 2014

Chemistry
How would you prepare pure dry crystals of pottasium trioxonitrate (v) ?.
June 9, 2014

physics
a flying bat emits squeaks of frequency 80 kHz.if a stationary observer hears the frequency of the squeaks as 78kHz,is the bat moving towards or away from the observer?determine the speed at which the bat is flying.
May 28, 2014

speech
traditional african marriage is an advantage for men only not women?
May 5, 2014

speech
traditional african marriage is an advantage for men only not women,?
May 5, 2014

Physical sciences
Help me please!
April 16, 2014

Physical sciences
A factory siren emits a sound at 900hz.what frequency will be heard by the driver of a car traveling at 100km.h away from the factory?
April 16, 2014

home econs
what are the factors to consider when making a stitch
February 13, 2014

Science
A force of 650N is acting upwards and a force of 850N is acting downwards along the same line,state the magnitude and direction of the resultant force and the equilibrant force
February 10, 2014

life orientation
identify and dercribe 3 environmental health hazards that cause ill health,crises,and or disasters within ur community or any other community within s.a and globally.include evidence that is current of the identified issues(e.g graphs and statistics)
July 23, 2013

TRIG Help help help test tommarow
A TV tower stands on top of the Empire State building. From a point (on the ground) 1150 feet from the base of the building, the angle of elevation to the top of the TV tower is 52 degrees. If the building is 1250 feet tall, what is the length of the TV tower?
May 22, 2013

economics
no, because many people die because of poverty
April 5, 2013

grade 12 life orientation
please help i'm clueless
March 30, 2013

Heat energy
CORRECTION (a). 500g of copper is heated from 30 degree celcius to 120 degree celcius, what is the quantity of heat supplied?(b). If the same quantity of heat is supplied to 300g of water initial at 30 degree celcius. What will be the final temperature.
March 19, 2013

Heat Energy
A container holds 3kg of water at 25 degree celcius. If 0.5kg of iron at 80 degree celcius is added to the water in the contain. What is the? (i) final temperature of the container. (ii) Quantity of heat gained by water
March 19, 2013

Heat Energy
1. (a) 500g of copper is heated from 30 degree celcius - 120 degree celcius?. (b) if the same quantity of heat is supplied to 300g of water initial at 30 degree celcius,what will be the final temperature.
March 19, 2013

ENG1511
I dnt hav a clue
February 28, 2013

Mechanics _ physics
A uniform bar 1m long is pivoted at the centre has a mass of 3kg. It is acted upon by a conquer which cause to possess an angular acceleration of 6rad/sec^2; calculate a. The moment of inertia of the bar b. The torque on the bar
February 14, 2013

Mechanics _ physics
A wheel rotating with an angular velocity of 16rad/sec is slowed to an angular velocity of 4rad/sec by an angular acceleration of 2rad/sec^2.find a. The angle turned in the process of slowing down b. The time required
February 14, 2013

Mechanics
Find the moment L about a perpendicular axis through the rod at a distance L/3 from the centre of mass.
February 14, 2013

Mechanics
Find the moment L about a perpendicular axis through the rod at a distance L/3 from the centre of mass.
February 14, 2013

Mechanics
An areoplane propeller has a 100kg and radius of gyration of 0.6cm.find its moment of inertia.how large a torque is required to give it angular acceleration of 20rad/sec^2
February 14, 2013

Mechanics
An aeroplane propeller has a 100kg and radius of gyration of 0.6cm.find its moment of inertia.How large a torque is required to give it angular acceleration of 20rad/sec^2
February 14, 2013

Mechanics
An aeroplane propeller has a 100kg and radius of gyration of 0.6cm.find its moment of inertia.How large a torque is required to give it angular acceleration of 20rad/sec^2
February 14, 2013

Mechanics
An aeroplane propeller has a 100kg and radius of gyration of 0.6cm.find its moment of inertia.How large a torque is required to give it angular acceleration of 20rad/sec^2
February 14, 2013

Mechanics
What is Viscosity
January 17, 2013

Mechanics
What is Viscosity
January 17, 2013

Mechanics
What is Viscosity
January 17, 2013

Mechanics_physics
An argon atom has a mass of 6.64 x 10kg has 5.5 x 108J of kinetic energy. At what velocity is it moving.?
January 17, 2013

physics
if a car moving 180km/h reduces to 72km, what is the percentage change in kinetic energy?
January 9, 2013

mechanics- physics
An electron moving at a speed of 5 x 10 raise to power 6m/s was shot through a sheet of paper which is 2.1 x 10 raise to power 4cm thick. The electron emerges from the paper with a speed of 2 x 10 raise to power 6 m/s. Find the time taken by the electron to pass through the ...
January 6, 2013

mechanics- physics
An electron moving at a speed of 5 x 10 raise to power 6m/s was shot through a sheet of paper which is 2.1 x 10 raise to power 4cm thick. The electron emerges from the paper with a speed of 2 x 10 raise to power 6 m/s. Find the time taken by the electron to pass through the ...
January 6, 2013

mechanics- physics
An electron moving at a speed of 5 x 10 raise to power 6m/s was shot through a sheet of paper which is 2.1 x 10 raise to power 4cm thick. The electron emerges from the paper with a speed of 2 x 10 raise to power 6 m/s. Find the time taken by the electron to pass through the ...
January 6, 2013

mechanics- physics
An electron moving at a speed of 5 x 10 raise to power 6m/s was shot through a sheet of paper which is 2.1 x 10 raise to power 4cm thick. The electron emerges from the paper with a speed of 2 x 10 raise to power 6 m/s. Find the time taken by the electron to pass through the ...
January 6, 2013

mechanics_ physics
1.20kg mass is dropped from a height of 0.9M unto a spring with force constant K= 120N/m and negligible mass. Find the maximum distance the spring will compressed pls show full working and indicate formular.
January 6, 2013

mechanics_ physics
1.20kg mass is dropped from a height of 0.9M unto a spring with force constant K= 120N/m and negligible mass. Find the maximum distance the spring will compressed pls show full working and indicate formular.
January 6, 2013

mechanics_ physics
A trolley is use in pushing a book 1.20m along a horizontal table top with a horizonta force of 3.0N. The opposing force of friction is 0.6N. 1. How much work does his 3.0N force 2.what is the work done on the book by the friction? The total work done on the book pls indicate ...
January 6, 2013

.physics
correction of question. A lorry of mass 1000kg moving initially at 10m/s increases to 25m/s. In 5sec the impluse on the lorry is 15,000Ns; calculate 1. Acceleration 2.The distance covered.
January 5, 2013

physics
An argon atom has a mass of 6.64 x 10 kg has 5.5x108 joules of kinetic energy. At What velocity is it moving?
January 5, 2013

mechanics-physics
A lorry of mass 1000kg moving initially at 10m/s increases to 25m/s. In 5sec the on the lorry is 15,000Newtons; calculate: (a) Acceleration (b) The distance covered
January 5, 2013

mechanics - physics
A bullet of mass 3.0g moving at 500m/s hits a tree and pierced 20cm into the trunk of the tree.what is the resistimg force offered by the tree?
January 5, 2013

Mechanics - physics
A car of mass 400kg moving initial at 36km/h increases to 120km/h in 6sec, what is the force acting on the car?
January 4, 2013

Mechanics_physics
A soccer player kicked a ball at an angle of 37 degrees to the horizontal.if the range covered by the ball is 240.3m; calculate (a) The initial velocity of projection ? (b) The time of flight (c) The maximum height attained
January 4, 2013

Physics
Help imediately please very urgent! A stone is dropped from a cliff 200m high,if a second stone is thrown vertically upwards 1.50sec after the first was released,strike the base of the cliff at the same in stant as the first stone,with what velocity was the second stone thrown?
January 4, 2013

mechanics -physics
A car moved at 15m/s for 2minutes, afterwhich it moved at 18m/s for 45seconds,calculate the average velocity of the car?
January 2, 2013

life orientation
describe five sentences the importance of mananging ones finances.
July 23, 2012

life orientations
suggest 5 recommendations on how to address the pollution
May 1, 2012

chemistry
How can you prevent or stop eutrophication
April 29, 2012

life orientation
critically discuss 8 way in which the environmental problem impact on the within your community or any other community within south africa or globally
April 19, 2012

Physics
I cant solve this can someone help me please
April 17, 2012

Life Orientation
In which ways does air pollution impact on communities within South Africa
April 10, 2012

life orientation
critically discuss 8 ways in which the environmental problem impact on the within your community or any other community within south africa or globally
March 30, 2012

chemistry
i need a conclusion for experimenting a tin oxide compound my result for the emperical formula of compound is 2 which will be SnO2
March 16, 2012

algebra
The perimeter of triangle ABC is 4x+1,if 2 sides are x+2 and x-1,find the 3rd side
February 27, 2012

Algebra 2
Tell how many solutions this system has x-4y=2 x+4y=2
January 31, 2012

Algebra 2
Solve the linear system 4x+4y=-2 y=-x show work
January 31, 2012

Algebra 2
Solve the system y=-4x+4 y=-x-5 show work
January 31, 2012

Algebra 2
Determine the solution to the system y≤x+6 2x+y≤-6 show work
January 31, 2012

Algebra 2
Determine the solution to the system y≤2x-2 y≥-x-3 Show work
January 31, 2012

Algebra 2
A factory is producing DVD and Blu Ray discs. For each case of DVDs they make $180 profit. For each case of Blu Ray they make $250. The DVDs take 3 minutes of machine time and 7 minutes of labor. The Blu Rays take 4 minutes of machine time and 12 minutes of labor. The maximum ...
January 31, 2012

Algebra 2
A factory is producing DVD and Blu Ray discs. For each case of DVDs they make $180 profit. For each case of Blu Ray they make $250. The DVDs take 3 minutes of machine time and 7 minutes of labor. The Blu Rays take 4 minutes of machine time and 12 minutes of labor. The maximum ...
January 31, 2012

research&writing
Due Week 2 and worth 100 points Your sister owns a small clothing store. During a conversation at a family dinner, she mentions her frustration with having to manually track and reorder high demand items. She would like an automated system but has a very small budget. Write a ...
January 9, 2012

Algebra
Wat is the factorization of 2x^4+3x^3-38x^2-27x+180=0
November 22, 2011

tx, history
give three examples of how humans effect geography.
September 25, 2011

simultaneous equation
13x+6y=41
August 23, 2011

chemistry
Why are standard solutions of reductants less often used for titrations than solutions of oxidants?
July 13, 2011

social science
a sociological theory concerned with the issues of who benefits from particularcsocial arrangements and how the powerful maintain their positions is known as:
April 25, 2011

math
three groups of students are sharing left over pizza all the same size in witch group does each student get the most pizza
March 2, 2011

Math
Great thanks
February 3, 2011

social studies
I am one of the United States' most famous attractions. I am 279 milies (449 km) long and 1 mile (1.6 km) deep. People come from all over to hike in and around me.
May 21, 2010

math
what was the population of the world in 1500 in billions if it is 0.5
May 10, 2010

com. 140
What kind of unwanted reactions might you encounter when trying to convince the business committee to except your proposal for a new service?
March 26, 2010

Penn Foster Writing Assignment Writing Skills
It is not dump maybe you did some mistakes
March 24, 2010

4th grade math
wat is the method
November 3, 2009

crt 205
what is capital punishment
October 25, 2009

Accounting
I'm tryng to draft a End of the Month Income Statement and I'm not sure what items to look for to record under the Revenue section. Can anyone please help or advise me what to look for?
February 28, 2009

Accounting
Thank you so much, it's more than what I had at first.
February 25, 2009

Accounting
*I don't know where to begin, please HELP* Use the following adjusted trial balance of Webb Trucking Company to prepare a classified balance sheet as of December 31, 2005. Account Title Debit Credit Cash . . . . $ 7,000 AR . . . . . 16,500 Office Supply 2,000 Trucks . . . ...
February 25, 2009

Accounting
The Ritz Manor is a popular seaside resort. A double room costs $220 for one night. In order to reserve a room, guests must pay one night’s stay in advance. On each floor of the hotel, Vendalite Company operates vending machines with energy bars, juices, and other snacks ...
February 19, 2009

Physics
A woman on a bridge 75.0m high sees a raft floating at a constant speed on the river below. She drops a stone from rest in an attempt to hit the raft. The stone is released when the raft has 7.00m more to travel before passing under the bridge. The stone hits the water 4.00m ...
December 28, 2008

Essay
Thank you again,I thank God for you and this site.
July 25, 2008

Essay
This is the edited version! The economy has changed everything that we have become accustomed to, such as the way we spend our money. We make choices that meet our standards in budgeting the income we receive. Adjusting to situations that are beyond our control forces us to ...
July 25, 2008

Essay
thank you, sorry I reposted the essay before i read your reponse. Thank you again.
July 25, 2008

Essay
The economy has changed everything that we have become accustomed to, such as the way we spend our money. We make choices that meet our standards in budgeting the income we receive. Adjusting to situations that are beyond our control forces us to rethink those decisions. For ...
July 25, 2008

Essay
I have corrected the spelling errors, please help me become a better writer! The economy has changed everything that we have become accustomed to, such as the way we spend our money. We make choices that meet our standards in budgeting the income we receive. Adjusting to ...
July 25, 2008

Essay
Do I have any errors? Is this essay a good one? How can I improve this?
July 25, 2008

Essay
Please let me know how I can write better.
July 25, 2008

Essay
The economy has changed everything that we have become accustomed to, such as the way we spend our money. We make choices that meet our standards in budgeting the income we receive. Adjusting to situations that are beyond our control forces us to rethink those decisions. For ...
July 25, 2008

Essay
Please help me to improve this essay.
July 25, 2008

(Writeacher)Writing Skills--Essay
This is the revise version.
July 25, 2008

Writing Skills--Essay
The economy has changed everything that we have become accustomed to, such as the way we spend our money. We make choices that meet our standards in budgeting the income we receive. Adjusting to situations that are beyond our control forces us to rethink those decisions. For ...
July 25, 2008

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