Sunday

April 20, 2014

April 20, 2014

Total # Posts: 91

**Physical sciences**

Help me please!

**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?

**home econs**

what are the factors to consider when making a stitch

**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

**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)

**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?

**grade 12 life orientation**

please help i'm clueless

**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.

**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

**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.

**ENG1511**

I dnt hav a clue

**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

**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

**Mechanics**

Find the moment L about a perpendicular axis through the rod at a distance L/3 from the centre of mass.

**Mechanics**

Find the moment L about a perpendicular axis through the rod at a distance L/3 from the centre of mass.

**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

**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

**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

**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

**Mechanics**

What is Viscosity

**Mechanics**

What is Viscosity

**Mechanics**

What is Viscosity

**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.?

**physics**

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

**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 sh...

**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 sh...

**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 sh...

**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 sh...

**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.

**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.

**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 ...

**.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.

**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?

**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

**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?

**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?

**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

**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?

**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?

**life orientation**

describe five sentences the importance of mananging ones finances.

**life orientations **

suggest 5 recommendations on how to address the pollution

**chemistry**

How can you prevent or stop eutrophication

**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

**Physics**

I cant solve this can someone help me please

**Life Orientation**

In which ways does air pollution impact on communities within South Africa

**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

**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

**algebra**

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

**Algebra 2**

Tell how many solutions this system has x-4y=2 x+4y=2

**Algebra 2**

Solve the linear system 4x+4y=-2 y=-x show work

**Algebra 2**

Solve the system y=-4x+4 y=-x-5 show work

**Algebra 2**

Determine the solution to the system y≤x+6 2x+y≤-6 show work

**Algebra 2**

Determine the solution to the system y≤2x-2 y≥-x-3 Show work

**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 ...

**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 ...

**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 ...

**Algebra**

Wat is the factorization of 2x^4+3x^3-38x^2-27x+180=0

**tx, history**

give three examples of how humans effect geography.

**simultaneous equation**

13x+6y=41

**chemistry**

Why are standard solutions of reductants less often used for titrations than solutions of oxidants?

**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:

**math**

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

**Math**

Great thanks

**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.

**math**

what was the population of the world in 1500 in billions if it is 0.5

**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?

**Penn Foster Writing Assignment Writing Skills**

It is not dump maybe you did some mistakes

**4th grade math**

wat is the method

**crt 205**

what is capital punishment

**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?

**Accounting**

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

**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 . . . ...

**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 ...

**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 i...

**Essay**

Thank you again,I thank God for you and this site.

**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 re...

**Essay**

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

**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 i...

**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 situa...

**Essay**

Do I have any errors? Is this essay a good one? How can I improve this?

**Essay**

Please let me know how I can write better.

**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 i...

**Essay**

Please help me to improve this essay.

**(Writeacher)Writing Skills--Essay**

This is the revise version.

**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 i...

**Writing Skills--Essay**

People are changing everyday because of the changes in this world. The economy changes everything that we have become accustomed to,like the way we spend our money, and the choice to become adjustable to whatever the situation is. I use to buy over three hundred dollars in gr...

**essay**

I was wondering if anyone can provide a essay topic? Then I can post it and you tell me what u think.

**Accounting 102**

Turner and Isham agreed to form a partnership. Turner contributed $ 200,000 in cash, and Isham contributed assets with a fair market value of $ 400,000. The partnership, in its initial year, reported net income of $ 120,000. Assume that the partnership agreement states that Tu...

**social studies**

which state in the U.S. is closest to the North Pole?

**world history**

thank yew so much...

**world history**

where on earth is a place that is uninhabited by humans... in other words... where can a civilization not exist???

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