Saturday
August 2, 2014

Posts by Lisa


Total # Posts: 2,968

physics
a football is kicked 40 meters. if the ball is in the air for four seconds what is the intial speed it was kicked

physics
a 1 kg dart moving horizntally at 10 m/s sticks to a wood block of mass 9 kg which slides across a friction free level surface. what is the speed of the block and dart after collision?

probability
1. A large video rental chain recently decided to change its rental policy, allowing an unlimited return date instead of requiring that movies be returned the next day. The marketing team reasoned that this would greatly increase the popularity of their stores, and also that 8...

physics
At what temperature do the molecules of nitrogen gas have an rms speed of 34 m/s? 34 m/s is a typical highway speed for a car.

math
Robert Mason's account of $98.50 has been delinquent for three months. According to the office procedures manual, after 90 days a 2% service charge, compounded monthly, is added to future bills. What will be the amount owed after nine months?

Medical Assisting
Steri-strips cost $4.95 per box, there are 100 per box. If an orthopedic surgical group uses 200 Steri-strips a month, how much would be saved in a year by making a single purchase for a year's supply rather that 12 monthly purchases.If large lots of 1,000 or more, the man...

Business Communications
Im not sre of the answer

Business Communications
Which of the following would be an example of an emotional appeal that is part of a persuasive message? (Points: 5) "All of the ingredients we use are home-grown in the United States." "We can save 20% in labor costs if we relocate our plant to the Midwest."...

Business Communications
Which of the following is NOT a question you need to answer to choose a persuasive strategy? (Points: 5) What do you want readers to do? What points will the audience agree with? How strong a case can you make? What kind of persuasion does your organization value? IM CONFSE I ...

Business Communications
What is the BEST reason to omit the reason for the refusal in a negative message? (Points: 5) The reader may not think of the reason. The reason reflects poorly on the company. The reason benefits the reader, but not the writer. The reason is watertight. im not so sre of the a...

chemistry
i think I am not doing this part right (1/n5^2 - 1/n1^2)

math
donna runs 7 miles in 75 minutes. At the same rat, how many miles would she run in 45 minutes?

chemistry
i think I am not doing this part right (1/n5^2 - 1/n1^2)

chemistry
I think I am doing something wrong. I keep coming up with 8.72x10^17 and it is telling me I am wrong. I know D E=2.18x10^-18 x (1/1^2-1/5^2)

chemistry
calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from n=5 to n=1 how do I do this?

chemistry
If 4.0 L of a 4.9 M SrCl2 solution is diluted to 40 L, what is the molarity of the diluted solution?

chemistry
A chemist wants to make 5.5 L of a 0.250 M CaCl2 solution, what mass of CaCl2 (in g) should the chemist use?

College Chem
How many mL of concentrated ammonia (14M) should be diluted to 250 mL to make a 0.75 M NH3 solution?

physics
Suppose I have a spring. I add a mass (m = 1.0 kg) and it is displaced by 15 cm. What is the spring constant k in units of (N/m)?

Chemistry
Explain, in terms of subatomic particles, the difference between S-32 and S-34

Physics
I have a spring on a horizontal frictionless surface. Initially it is un-stretched and at x = 0 cm. I then pull it back 10 cm and release it. What is the amplitude of the oscillations (the object has mass m)?

Organic Chemistry
why wash the organic layer with distilled water?

Statistics
Assume the body temperature of healthy adults are normally distributed with a mean of 98.2 degrees F and a standard deviation of .62 degrees F. If you have a temperature of 99.0 what is your percentile score?

Chemistry
Explain, in terms of subatomic particles, the difference between S-32 and S-34

english
Okay this is my Thesis:The Internet is better in terms of providing access journals, special collections and it is quicker when searching informations than Library.While in library resources can't be checked our or be available. Is my thesis good? And the four examples I h...

english
I have to wrtie a paragraph in which I make claim, state thesis, can not use "For instance or for example and support with 4 examples.I choose this prompt "The internet is a much better resource for students than a library" Please tell me how to start this witho...

geology
what is the primary basis for differentiating the eras?

2 biology terms
Morphology refers to the structure of something : land masses, body parts, shells, etc. Anatomical refers to anatomy which is the structure of a body (be it human or otherwise). So morphology is a more general term. You could say that anatomy is the study of the morphology of ...

Physics
With the energy needed to warm up some amount of water from 40C to 64C, how high could you lift it?

college
A dog bites a large chunk of flesh from a man's leg. The large, open wound will likely heal by the process of?

Math
I have two different questions. what is the set built notation of -11x-24<27-10x and write the slope intercept equation for the line with slope -5/6 and y intercept (0,4)

Math
Write the slope intercept equation for the line that passes through (14,-2) and is perpendicular to 7x-10y=18

College Chemistry
I DO NOT understand the following! Please HELP :) 1st Part Substances A, B, and C can all act as oxidizing agents. In solution, A is green, B is yellow, and C is red. In the reactions in which they participate, they are reduced to A-, B-, and C- ions, all of which are colorles...

College Chemistry
Substances A, B, and C can all act as oxidizing agents. In solution, A is green, B is yellow, and C is red. In the reactions in which they participate, they are reduced to A-, B-, and C- ions, all of which are colorless. When a solution of C is mixed with one containing A- ion...

Physics
change in pressure=density*length*gravity

anatomy and physiology
When you swallow a peanut, the peanut first comes in contact with the?

anatomy and physiology
what cellular process involves mitosis?

teacher aide
still need help..

Chemistry
What mass of H2O is required to form 1.2 L of O2 at a temperature of 310 K and a pressure of 0.950 atm? 2H2O (l) ---> 2H (g) + O2 (g)

math
What is the time to double when the initial investment is $1000 and the annual rate is 3.5%

Chemistry
A gas mixture with a total pressure of 750 mmHg contains each of the following gases at the indicated partial pressures: , 265 mmHg; Ar 134 mmHg; and ,O2 157 mmHg; The mixture also contains helium gas.

Chemistry
A weather balloon is inflated to a volume of 29.6 L at a pressure of 734 mmHg and a temperature of 27.0 C. The balloon rises in the atmosphere to an altitude, where the pressure is 360 mmHg and the temperature is -13.6 C.

Managerial Accounting
What is your view of the business economics of the Thoroughbred Horse Industry? What are the risk? How should the industry measure success?

Business Communications
anyone else have an opinion please?

Business Communications
ok i dnt think A wold be correrct is because in my textbook it says that sentence implies both that your message did not answer all questions and the reader will hestiate to contact you and that its negative

Business Communications
ok i would think its C because its a new client and would want to provide all the positive aspects to the client so that he/she would not regret their decision of being apart of the organization

Business Communications
Which is an effective strategy for ending an informative letter to a new client? (Points: 5) Stress that the reader is welcome to call you anytime if more information is needed. Refer to your company's future relationship with the reader's organization. Mention your co...

Business Communications
Which of the following statements about how the standard pattern for informative and positive messages should be applied is essential? Use all five of the elements of the basic organizational pattern. Present each element in a separate paragraph of its own. Present the organiz...

Business Communications
thanks you very much

Business Communications
Which statement presents a negative element in a positive way? (Points: 5) The part can be replaced at no charge only if your unit is less than two years old. If your unit is too old, you will have to pay $49 for a replacement part. We cannot replace the part for free on those...

anatomy and physiology
Which one of the following is an example of epithelial tissue?

Chemistry
How much heat, in kilojoules, is associated with the production of 273kg of slaked lime, Ca(OH)2? CaO(s)+H2O(l)-->Ca(OH)2(s) delta H=-65.2kJ

Chem
formation enthalpy of ethane -> –83.8 kJ/mol formation enthalpy of water -> −291.83 kJ/mol formation enthalpy of ethanol -> –277.7 kJ/mol I got 97.93 and got it wrong I only have one try left. I dont know whats wrong.

Physics
Two identical metal plates with small holes are aligned a distance L=7.2 cm apart. They have a potential difference of 141 Volts. An electron can enter through the hole in the negative plate and exit through the hole in the positive plate. If it enters with a velocity of 3680 ...

Accounting
Attached is the actual Financial Statements, Cash Flow, and Taxes associated with the assignment questions below. 2007 & 2008 statements below. We are working on a comprehensive/spreadsheet problem (financial statements, cash flow and taxes). A balance sheet for a company call...

Chemistry
thank you so much. I needed a mind referesher ;-)

Chemistry
For the reaction shown, compute the theoretical yield of the product (in grams) Ti(s)+2Fe(g) = TiF2(s) 6.0 g Ti, 6.0g F2

Chemistry
thank you .38 M is right

Chemistry
now i got a different answer .38 M

Chemistry
so would the answere be .43 M in two significant figures?

Chemistry
If 4.0 L of a 4.8 M SrCl2 solution is diluted to 50 L , what is the molarity of the diluted solution?

Chemistry
A chemist wants to make 4.5 L of a 0.310 M CaCl2 solution what mass of CaCl2 (in g) should the chemist use

Physics
An electron travels at a speed of 1.0×104 through a uniform magnetic field whose magnitude is 1.2×10−3 . What is the magnitude of the magnetic force on the electron if its velocity and the magnetic field are perpendicular?

Chemistry
If 4.0 L of a 4.8 M SrCl2 solution is diluted to 50 L , what is the molarity of the diluted solution?

Physics
Calculate the radial acceleration of an object on the ground at the earth's equator in m/s2, turning with the planet.

Medical English essay
I have the same exact questions to answer and in same format. how do i come up with my own version?

Chemistry
NaI(aq)+Hg(C2H3O2)2(aq) complete and balance complete equation

Chemistry
Give your answer as an ordered set of numbers , , , ... Use the least possible integers for the coeffiients Consider the following unbalanced equation for the neutralization of acetic acid: HC2H3O2(aq)+Ba(OH)2(aq)=H2O(l)+ this has the werid sybols and I can not type it out for...

Chemistry
It's oksy i got the answer 7.4 mol Al Thank you, Maybe you can help me with the next question. :-)

Chemistry
4al(s)+3o2(g)---->2o3(g) limiting reactant 7.4 mol Al or 6.5 mol O2

physics
A force of 5.00 N to the left causes a 1.35 kg book to have a net acceleration of 0.76 m/s2 to the left. What is the frictional force acting on the book?

physics
A girl pulls a sled along a level dirt road by means of a rope attached to the front of the sled. The mass of the sled is 40kg the coefficient of friction is. 600, and the angle between the rope and the road is 30 degrees. What pull must the girl exert to move the sled at cons...

Chemistry
Write balanced complete ionic equation for HC2H3O2(aq) + K2CO3(aq)-----> H2O(l)+CO2(g)+KC2H3O2(aq) I put 2H+(aq)+2C2H3O2-2(aq)2K+(ag)+CO3-2(aq)------>H2O(l)+CO2(g)+2K+(aq)+C2H3O2-2(aq) and said it was wrong, but I got this part right. 2H+(aq)+CO3 2-(aq)----->H2O(l)+CO...

Calc
The area of a circular sinkhole increases at a rate of 420 square yards per day. How fast is the radius of the sinkhole growing when its radius is 50 yards?

Math
find values for r and t such that the inequality r < S < t best describes s, the length of the third sides of a triangle for which the lengths of the other two sides are given. 11. 2 and 4 thanks for the help !

geometry
find values for r and t such that the inequality r < S < t best describes s, the length of the third sides of a triangle for which the lengths of the other two sides are given. 11. 2 and 4 thanks for the help !

science
the carrying capacity for a population is estimated at 500. the population size is currently 400 and r max is 0.01. what is dN/df?

Science
if the large piston of a hydraulic press has an area of 60"(squared), what will be the total force upon it if a pressure of 15 psi is produced by the small piston?

Science
assume the pressure is kept constant if the volume of a gas quadruples, how does the absolute temperature change?

Science
the small cylinder of a hydraulic press has an area of 2"(squared). If a force of 10# is applied to the small piston, how much is the pressure within the larger cylinder increased, according to pascal's principle.

Chem
A 11.9-g sample of a gas has a volume of 5.25L at 30 degrees celsius and 762mm Hg. If 2.4g of the same gas is added to this constant 5.25-L volume and the temperature raised to 64 degrees celsius, what is the new gas pressure?

Physics
An object of mass 1.25 kg on a flat surface has two forces acting on it, F1 and F2 in the horizantal direction. F1 acts in the positive direction, F2 acts in the negative direction. The magnitude of F1 is 26.75 N. The object moves strictly along the horizontal x-axis, which we...

Chemistry
i don't understand the question though.

Chemistry
What incorrect information is given by the formula MgOH2 instead of the correct formula, Mg(OH)2 ?

Physics
suppose that the net external force exerted on the car is 350 N parallel to the ground, and the mass of the car is 1800 kg. What is its acceleration?

Physics
suppose that the net external force exerted on the car is 350 N parallel to the ground, and the mass of the car is 1800 kg. What is its acceleration?

preap physics
velocity = 0 m/s acceleration = 9.8 m/s^2

medical law and ethics
You are a health care professional working in a large office. Your administrator has asked you to prepare a poster summarizing the public duties of the physician as specified by law. The poster will be set up in the waiting room and will have a heading "We commit to these...

Physics
A force F=180 N pulls a crate at a 60 degree angle on a rough surface. The weight of the crate is 296 N and the friction force between the crate and the surface is 90 N. What state of motion might the crate be in?

Physics
Suppose that the coefficient of kinetic friction of the rubber of a car tire and the street is Uk = 0.8. What is the deceleration of the car on a flat street if the driver brakes sharply, so all the wheels are locked and skidding?

Physics
A brick of mass 1.0 kg slides down an ice roof inclined at 30 degrees with respect to the horizantal. If the brick starts from rest, how fast is it moving when it reaches the edge of the roof 0.90s later? Ignore friction

Statistics
The standard deviation of GPAs (grade point averages) of all male students at a college is .35 and the standard deviation of GPAs of all female students at the same college is .34. Suppose we take one sample of 40 male students and another sample of 50 female students from thi...

Chemistry
1. When a potassium atom reacts with a bromine atom, the bromine atom will a) lose 1 electron and form a positive ion b) lose 2 electrons and form a positive ion c) gain 1 electron and form a negative ion d) gain 2 electrons and form a negative ion I know its either C/D but im...

chemistry
How much of a 100mM solution do I need to add to a 2.5mM solution to make a solution with a final concentration of 10nM? Is there a formula for this? Please HELP!

Orientalism
I do not understand what Orientalism has to do with Arab and Muslim Americans. Can someone please explain

math
define standard form

chemistry
HELP

probability
icrobes in a certain colony exposed to radiation have a 1/6 chance of being mutated. a. If ten microbes from the colony are sampled, what is the probability that at most 4 will be mutated? b. If microbe from the colony is examined one by one, what is the probability that the f...

Physics
Assume cathy has to drag her suitcase along the floor of the airport terminal by a rope. The rope makes a 40.0 degree angle with the horizantal. The suitcase has a mass of 36.0 kg and Cathy pulls on the rope with a force of 65.0 N. a) What is the magnitude of the normal force...

probability
Microbes in a certain colony exposed to radiation have a 1/6 chance of being mutated. a. If ten microbes from the colony are sampled, what is the probability that at most 4 will be mutated? b. If microbe from the colony is examined one by one, what is the probability that the ...

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