Friday

November 28, 2014

November 28, 2014

Total # Posts: 463

**chemistry**

105 of is initially at room temperature (22.0). A chilled steel rod at 2.0 is placed in the water. If the final temperature of the system is 21.3, what is the mass of the steel bar?
*February 26, 2011*

**Maths**

How do you work out and show difference between 2 numbers i.e 60 students and 40 students out of 100
*February 16, 2011*

**Physics URGENT**

A tennis ball with a velocity of +10.7m/s to the right is thrown perpendicularly at a wall. After striking the wall, the ball rebounds in the opposite direction with a velocity of -5.9 m/s (to the left). If the ball is in contact with the wall for 0.009s, what is the average ...
*February 14, 2011*

**Physics URGENT**

A speeder passes a parked car at 35.0 m/s. The police car starts from rest with a uniform acceleration of 2.41 m/s^2. A.) How much time passes before the speeder is overtaken by the police car? B.) How far does the speeder get before being overtaken by the police car?
*February 14, 2011*

**Physics**

A range in a national park is driving at 47 km/h when a deer jumps onto the road 70m ahead of the vehicle . After a reaction of t seconds, the ranger applies the brakes to produce an acceleration of -2.00 m/s^2. What is the maximum reaction time allowed if the ranger is to ...
*February 14, 2011*

**Physics**

A small first aid kit is dropped by a rock climber who is descending steadily at 1.5 m/s. A.)After 3.1s, how far is the kit below the climber?
*February 14, 2011*

**algebra**

3x+4>9 3(2)+4>9 6+4>9 10>9 The value x=2 is a solution to the inequality. A value of x that would not be a solution would be any value lesser than 2, such as 1,0, or -1.
*February 14, 2011*

**math 8th please help**

First, find the total amount of students in the class. 10+15=25. There are 10 girls so the odds of choosing a girl are 10/25, reduced to be 2/5 There are 15 boys so the odds of choosing a boy are 15/25, reduced to be 3/5 The answers are 1. 2/5, or 2 out of 5 2. 3/5, or 3 out ...
*February 14, 2011*

**physics**

A plastic ball has a volume of 300 cm3 and a mass of 30 g. What fraction of the ball's volume will float above the surface of a lake of fresh water?
*February 13, 2011*

**Physics HELP ASAP PLEASE**

A hawk is flying horizontally at 10 m/s in a straight line 200m above the ground. A mouse it was carrying is released from its grasp. The hawk continues on its path at the same speed for two seconds before attempting to retrieve its prey. To accomplis the retrieval, it dives ...
*February 11, 2011*

**Pysichal Therapy Aide**

A PTA CAN ASK A SW TO HELP WITH ALL OF THE FOLLOWING EXCEPT: A. TO ASSES THE PATIENT'S HOME ENVIRONMENT AND INSTRUCT THE PATIENT AT DISCHARGE FROM THE HOSPITAL B. TO ARRANGE FOR HOME HEALTH SERVICES AT THE PATIENT DISCHARGED FROM THE HOSPITAL C. TO ARRANGE FOR MEALS-ON-...
*February 10, 2011*

**7th grade introduction/conclusion**

Okay, so: An intro should have a "hook," or something that grabs the reader. It should introduce the topic you're talking about. The conclusion should basically be like your intro, wording it differently and wrapping it up, adding an end statement which may be ...
*February 10, 2011*

**Physical therapy aide**

A pta can supervise a physical therapy aide to perform all of the following except
*February 9, 2011*

**Physics**

A 1000kg car accelerates from 3m/s East to 24m/s East at a rate of 3m/s. If the force of friction is 500N West; how much ower must the car exert? If heat and mechanical losses make the car only 60% efficient, what total power must be exerted to accomplish the acceleration in ...
*February 8, 2011*

**Physics**

A 60kg biker on a 20kg bike exerts 600W of power to accelerate from 1m/s to 9m/s in a distance of 40m. What is the force of friction acting on the bike and biker?
*February 8, 2011*

**Physics**

A stopped 100okg car exerts 160kW of power as it accelerate. If it is only 75% efficient, how far will it travel in 4 seconds?
*February 8, 2011*

**Chemistry**

Calculate the amount (volume) of 6.25% (wt./vol.) NaOCl solution (commercial bleach) required to oxidize 150 mg of 9-fluorenol to 9-fluorenone. Whenever appropriate, use balanced chemical equations as a part of your calculation.
*February 1, 2011*

**math**

my credit card charges me 1.575% interest per month on my average daily balance this month. Average daily balance for Jan.$810. What interest will i pay for Jan.
*January 23, 2011*

**physics**

a stunt car driver testing the use of air bags drives a car at a constant speed of 25m/s for a total of 100 meters. he applies his brakes and accelerates uniformlu to a stop just as he reaches the wall 50 meters away. SKETCH THE A GRAPH SHOWING POSITION V.S TIME and VELOCITY v...
*January 20, 2011*

**physics**

The punter on a football team tries to kick a football so that it stays in the air for a long "hang time." If the ball is kicked with an initial velocity of 23.0 m/s at an angle of 58.5° above the ground, what is the "hang time"?
*January 16, 2011*

**reimbursement methodologies**

Nadya what is the exam number you are doing? what course are you taking? Melody yes I will email you....
*January 4, 2011*

**reimbursement methodologies**

Nadya which book from Penn Foster are you looking at? I think I can help you with thes problems.
*January 4, 2011*

**math**

A landscaping company is laying a triangular flower bed. The height of the trangle is 15ft. What lengths of the base will make the area at least 255ft squared?
*December 21, 2010*

**Math**

Describe a situation using proportions or ratios in a financial or geometric problem. describe the situation in detail and provide a problem to illistrate it. What is the importance of this calculation in this situation..
*December 17, 2010*

**adult education**

describe why it is important to consider each domain in the study of adult development, provide an example of how one domain of development impacts the other two.
*December 10, 2010*

**Maths**

How to work out the comparison 13 out of 39 as a percent
*December 8, 2010*

**MATH urgent!!!**

My problem: From 1992 to 1996, the annual income for all the private golf courses in the United States can be approximated by the model: I=59t^2+2254, where I is the annual income in millions of dollars and t is the year, with t=0 corresponding to 1990. 1. In which year did ...
*December 7, 2010*

**MATH**

The path of a large stone fired from a catapult can be modeled by y= -0.00545x^2+1.145x where x is the distance the stone traveled (in yards) and y is the height of the stone (in yards). 1. find the distance the stone traveled. 2. find the maximum height of the stone. AND (...
*December 7, 2010*

**Math**

Please Help I am confused :)
*December 5, 2010*

**Math**

If P(B)=1/5 compute P(not B)? So I am thinking it may be P(not B)=0.2? Is this right?
*December 5, 2010*

**Math**

Ok so it would be P(B)=0.8, the probability that the grade is not a B.? I hope this is right now, if it isn't I give up....lol !
*December 5, 2010*

**Math**

Oh ok I think I get it, so P(B)=0.5, 1/2, and P(not B)=0.5,1/2??? Is that right?
*December 5, 2010*

**Math**

If a grade was drawn at random from the data shown below, what is the probability that the grade is not a B? Grade Frequency A 2 B 8 C 11 D 2 F 1 I think it is 1 out of 5 or 4 but I am not sure? Please help :) Thank you much!
*December 5, 2010*

**math**

a country has 221 mobile cellular telephones per 250 inhabitants. if the country's population is about 2,800 how many mobile cellular telephones does the country have? in your own words, using complete sentences solve the problem
*December 4, 2010*

**math**

Thanks, L. I know - the "why" is a bit tricky, especially for 5th graders, and my daughter is well ahead of grade level. I think your answer will probably work well enough.
*December 1, 2010*

**math**

We figured that part out. The girl was given $3.58 in change. Why was the error made (this is part of the original question).
*December 1, 2010*

**math**

Hanna bought 4 pencils for $.09/each, two notebooks for $1.58 each, and one pack of paper for $3.17 each. She paid with $10 and got $3.58 in change. Is this amount correct, and if not, why? Just need the WHY part of the answer. The correct change should be $3.31
*December 1, 2010*

**child care**

which of the following is an obstacle to learning for a begininning mover? A.knowledge of what elements of the movement to focus on B.chronic indifference characteristics between birth and age three C.shorter time to monitor perceptual input from the visual system D.difficult ...
*November 30, 2010*

**child care**

which of the following is an obstacle to learning for a begininning mover?
*November 30, 2010*

**6th grade**

how do u change a ratio into a percent
*November 28, 2010*

**Confidentiality in Allied Health Essay**

Writeteacher can you delete this whole questions please. I will find all the information on my own thanks and have a good day!!
*November 28, 2010*

**Confidentiality in Allied Health Essay**

Can anyone help me find other resources to the graded project for Penn Foster? I have the AMA, and the Peen foster books. Anything else would be great.
*November 28, 2010*

**Algebra**

Thank You!
*November 24, 2010*

**Algebra**

Find the equation of a line parallel to the line y=3/4x-5?? I am not sure how to do this problem, can someone Please help :) Thank You in advance!
*November 24, 2010*

**Chemistry**

a certain brand of laundry aid called "Oxydoodle" is 12.5% (w/w) sodium percarbonate and 87.5% (w/w) sodium carbonate. Calculate the % (w/w) h2o2 in Oxydoodle
*November 22, 2010*

**math**

A car radiator has a 6-liter capacity. If the liquid in the radiators 40% antifreeze, how much liquid must be replaced with pure anitfreeze to bring the mixture up to a 50% solutions? If I told you the answer is 1 liter, in your own words, using complete sentences explain how ...
*November 17, 2010*

**algebra 1**

What is value of x? What are you suppose to do with problem.
*November 16, 2010*

**business ethics**

Thanks for your response. I do not want you to do the homework for me. I guess I need a starting poing.
*November 16, 2010*

**business ethics**

CONFLICT OF INTEREST Big Company is a large manufacturer of health-care products that is under fire from the government to lower costs. Big Company has an excellent reputation and is widely acknowledged as one of the best managed companies in the country. In spite of its ...
*November 16, 2010*

**business information systems**

Are the alternative methods and tools: agile development, end-user development, and component-based development. I'm unsure how they differ from SDLC. Can you help me with this.
*November 16, 2010*

**business information systems**

list the alternative methods and tools for system development. How do they differ from SDLC?
*November 16, 2010*

**Physics**

Starting from rest, a 98-kg firefighter slides down a fire pole. The average frictional force everted on him by the pole has a magnitude of 720 N, and his speed at the bottom of the pole is 3.8 m/s. How far did he slide down the pole?
*November 16, 2010*

**MATH**

A rectangular prism has a volume of 6,090 cm3, a width of 14 cm, and a length of 15 cm. What is the height of the rectangular prism?
*November 11, 2010*

**HUM/205**

What is the role of an artist?
*November 5, 2010*

**math**

the problem is 15x(7-7)+(5x2)= i got the answer 10 but im not sure what order i should do the operations in to get my answer? Help?
*November 3, 2010*

** Geometry**

Triangle FGH has the following side lengths: FG = 5 ft, GH = 10 ft, HF = 12 ft Triangle PQR is similar to triangle FGH. The longest side of triangle PQR, RP = 7.2 ft.
*November 3, 2010*

**Physics**

7 m/s
*November 2, 2010*

**Medical English essay**

Debby, Can you tell me were you got all your infromation for this essay?? I have to do the sameone and I am coming up empty handed.
*October 31, 2010*

**chemistry 110**

what combinations of Zn, Al, ZnSO4 and Al2(SO4)3 would you make to illustrate that Zn is less active than Al?
*October 28, 2010*

**chemistry**

write chemical equations for the reactions when you put each Al, Fe, Cu in 0.5M Al2(SO4)3
*October 28, 2010*

**chemistry**

Zn is less active than Mg. Write the equations describing what occurs when ou mix: a)Zn with 0.5M magnesium chloride, MgCl2 b)Mg with 0.5M ZnCl2
*October 28, 2010*

**elementary**

1.)Measurement of a television if it is approx. 18.5 inches high and just over 26 inches wide, How should the size be advertised in a store, rounding to the nearest whole number? 2.)A TV store owner wanted to make a shelf to display television sets. How long should he make the...
*October 28, 2010*

**Science**

What is an area without pressure called?
*October 27, 2010*

**Physics**

ok and if i have more then two distances then do i add all 3 then divide??
*October 13, 2010*

**Physics**

A person walks 8.4522x10^1 m East, then turns around and walks 7.8409x10^1 m West. The total time to walk this distance was 8.7343x10^2 s. What is the speed of the walker, expressed to 3 significant figures?
*October 13, 2010*

**Physics**

In 1998, NASA launched DS-1 (Deep Space 1). This spacecraft successfully flew by the asteroid 1992 KD. The propulsion system worked by ejecting argon ions at high speed. The propulsion system could increase the velocity by 7.2284x10^0 m/s per day. What was the average ...
*October 13, 2010*

**Physics**

In 1998, NASA launched DS-1 (Deep Space 1). This spacecraft successfully flew by the asteroid 1992 KD. The propulsion system worked by ejecting argon ions at high speed. The propulsion system could increase the velocity by 7.2284x10^0 m/s per day. What was the average ...
*October 13, 2010*

**Math**

An experiment has three possible outcomes: A,B, and, C. If P(A)=P(B) and P(C)=2P(A)what is the probability of each event? Hint: We know that in this case, P(A)+ P(B)+P(C)=1; therefore,P(A)+P(A)+2P(A)=1 Please Help :)
*October 12, 2010*

**chemistry**

when a student removed the crucible cover afer the first strong heating in creating magnesium oxide, some of the white was knocked from the cover to the floor and was lost. did this loss cause the calculated number of moles of oxygen in the compound to be too high or too low?
*October 4, 2010*

**9th grade**

The islamic ...and Arabic ... held the empire together
*September 28, 2010*

**economics**

What is one kind of monopol that the U.S. government generally permits?
*September 24, 2010*

**vocabulary**

i need to put outwit in a sentence
*September 23, 2010*

**algebra**

Solve by the elimination method: 0.3x-0.2y=4 0.4x+0.5y= -29/19 (fraction)?? Please Help I do not understand Algebra!!
*September 18, 2010*

**geology 101**

how do fossils help in determining the relative age of strata? Are the three different localities around the same relative age? Explain your response
*September 17, 2010*

**math**

name three numbers between 0.33 and 0.34
*September 15, 2010*

**science**

what is a control?
*August 26, 2010*

**Math**

$100 is deposited in a savings account that pays 4% interest compounded annually. A) how much is in the account after 5 years? B) use logarithms to determine how many years it will take for the account to grow to $1000. Could someone show me how to do this step by step? Thank you
*August 23, 2010*

**Math Word Problem**

The area of a rectangle is 99 ft2 , and the length of the rectangle is 7 ft more than twice the width. Find the dimensions of the rectangle.
*August 22, 2010*

**Chemistry**

Suppose you are given a sample of a homogeneous liquid. What would you do to determine whether it is a solution or a pure substance?
*August 15, 2010*

**computer science**

hi i'm taking compsci and I need someone to give me some examples of these classes, thanks! You will have to write a class to represent one of the following items. Note that each class must a proper constructor even though the constructor is not explicitly named. 1. a ...
*May 28, 2010*

**calculus**

p(x)=5x^3-4x^2+20-16 use synthetic division to show that x=2i is a zero of p(x)
*May 26, 2010*

**chemistry**

what type of intermolecular force describes the interaction between Ca2+ and Mg2+ with water? a. dipole-dipole b. hydrogen bonding c. ion-dipole d. London dispersion
*May 11, 2010*

**chemistry**

if you burned a marshmallow with a net mass of 0.8g and you heated 49.1 g of water from an initial temperature of 24C to a final temperature of 28C what is the heat energy per gram of marshmallow? (express your answer in J/g) a. 822 J/g b. 1027 J/g c. 4.184 J/g d. 7210 J/g
*May 10, 2010*

**chemistry**

the answer I got was 52.9... right??
*May 10, 2010*

**chemistry**

when a 0.4-g almond sample is burned the heat gained by the water is 7525.4 J and the temperature of the water increased from 24 C to 58 C what was the mass of the water in grams? a. 50 b. 100 c. 45 d. 52.9
*May 10, 2010*

**nutritian**

What is responsible for one food item to have higher energy content than another? a. lower fat content b. higher fat content c. lower carbohydrate content d. higher carbohydrate content
*May 9, 2010*

**nutritian**

what is responsible for one food item to have higher energy content than another? a. lower fat content b. higher fat content c. lower carbohydrate content d. higher carbohydrate content
*May 9, 2010*

**chemistry**

is the burning of a marshmallow a(n) endothermic or exothermic process?
*May 9, 2010*

**science**

Create A 7- To 10-Slide Powerpoint® Presentation That Describes Environmental Benefits And Challenges Of Urbanization. In Your Own Words, Include Descriptions Of Two 1996 Award Winners, Discussing How They Overcame One Of The Challenges Mentioned In Your Presentation.".
*April 13, 2010*

**science**

Create A 7- To 10-Slide Powerpoint® Presentation That Describes Environmental Benefits And Challenges Of Urbanization. In Your Own Words, Include Descriptions Of Two 1996 Award Winners, Discussing How They Overcame One Of The Challenges Mentioned In Your Presentation.".
*April 13, 2010*

**world liturature and language**

Write a three-paragraph comparison between themes in Márquez's "Old Man" and Kafka's "The Metamorphosis".
*April 8, 2010*

**8th grade**

is a shortage of tyrosine the cause of albinism? can u explain the answer.
*April 4, 2010*

**Microbiology**

If a culture starts out with 1000 cells and after 8 hours there are 64000 cells, how many generations have occurred? A. 4 B. 32 C. 6 D. 64 E. impossible to determine
*March 30, 2010*

**computers**

Average typing speed for middle school
*March 20, 2010*

**Penn Foster**

X-rays or are diagnostic tools used to visualize internal organs
*March 17, 2010*

**chemistry**

How do I find n?
*March 8, 2010*

**chemistry**

What volume of O2 gas, measured at 297K, is needed to completely burn all the methane (CH4) in a 3.00L container at the same T and P?
*March 8, 2010*

**chemistry**

A gas that occupies a volume of 6.75L at 89.0atm will occupy what volume at 68.55mm Hg if the temperature remains constant? (89.0atm/0.09atm)*6.75=6,680 V2=6680 Is this right??
*March 8, 2010*

**chemistry**

how do I convert 17.4 cubic ft into liters?
*March 8, 2010*

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