Thursday

July 24, 2014

July 24, 2014

Total # Posts: 643

**physics**

A 13.0 {\rm g} plastic ball is dropped from a height of 2.80 {\rm m} and is moving at 3.20 {\rm m/s} just before it hits the floor. How much mechanical energy was lost during the ball's fall? delta E mech = ____ J

**physics**

A racing dog is initially running at 20.0 m/s, but is slowing down. Question: How fast is the dog moving when its kinetic energy has been reduced by half? Question: By what fraction has its kinetic energy been reduced when its speed has been reduced by half?

**physics**

A constant horizontal pull of 8.25 N drags a box along a horizontal floor through a distance of 19.1 m. Q How much work does the pull do on the box? Ans: i got the answer as W = 158 J But i have problem with the second question? Question: Suppose that the same pull is exerted ...

**world history**

For the period from 1500-1830, compare North American racial ideologies and their effects on society with Latin American/Caribbean racial ideologies and their effects on society

**physics**

A racing dog is initially running at 20.0 , but is slowing down. Q1. How fast is the dog moving when its kinetic energy has been reduced by half? Q2. By what fraction has its kinetic energy been reduced when its speed has been reduced by half?

**Algebra II**

Help, Im stuck.... I cannot remember what to do. (x+6)(x-7)(x+4)>0 The solution set is....{x, } Thank you:)

**Algebre II**

Help, Im stuck.... I cannot remember what to do. (x+6)(x-7)(x+4)>0 The solution set is....{x, } Thank you:)

**algebra**

Yes!, Thank you. It is (-6v^2 + 2v +4) Thank you for reminding me of the - sign.

**algebra**

(-6^2 + 2v + 4) - (6v^2 + 4)= Is the solution: 12v^2 + 2v?

**chemistry**

what is a standard solution? and what is a function of an indicator in a titration?

**chemistry**

what is a standard solution?

**physics**

When the thigh is fractured, the patient's leg must be kept under traction. One method of doing so is a variation on the Russell traction apparatus. (See the figure.) Please place period in place of (dot) oi53(dot)tinypic(dot)com/2a0b7yx(dot)jpg If the physical therapist s...

**Algebra**

5 and p more

**Algebra II**

I should know where to start, but I have a brain freeze. Will someone get me started? a^2 + b^2 = f^2, solve for a thanks :)

**College Algebra**

m = 60(30) = 1800 m = 60(42) = 2520

**physic**

indentify at least two ereas of physic involved in the following: a) building a louder stereo system in your car b)bungee jumping c)judging how hot an slectric stove burner is by looking at it. d) cooling off on a hot day by diving into a swimming pool.

**physics**

Identify the area of physics that is most relevant to each of the following situations. a)A high school football game b)Food preparation for the prom c)Playing in the school band d)Lightning in a thunderstorm e)Wearing a pair of sunglasses outside in the sun

**Algebra B**

Yes, You explained it very well. Thanks for taking the time.

**Algebra B**

Oh, reverse FOIL! Thank you.

**Algebra B**

The left, Thanks

**Algebra B**

x^2 - 5/2x + 25/16 = -4 + 25/16 = (x-5/4)^2 = -64/16 + 25/16 = (x-5/4)^2 = -39/16 Would someone please explain how we arrived at (x - 5/4)^2 = -64/16 + 25/16 from x^2 - 5/2x + 25/16 = -4 + 25/16 Thanks in advance for your help.

**chemistry**

Consider a gas that has a molar mass of 100.21 g/mol. What mass of this gas would occupy a 150 mL container under a pressure of 1.00 atmosphere and a temperature of 25 degrees centegrade?

**chemistry**

Consider a gas that has a molar mass of 100.21 g/mol. What mass of this gas would occupy a 150 mL container under a pressure of 1.00 atmosphere and a temperature of 25 degrees centegrade?

**algebra B**

Using the formula, w = cr^-2, solve for r. An object weighs 100lbs. What value of C will result in r = 3963? I have another question similar, but if someone could guide me in this one, I can figure out the other one. Thanks,

**Math**

A bucket that weighs 3.2 pounds and a rope of negligible weight are used to draw water from a well that is 82 feet deep. The bucket is filled with 42 pounds of water and is pulled up at a rate of 2.3 feet per second, but water leaks out of a hole in the bucket at a rate of 0.3...

**Algebra B**

I am confused as to what the nth power is. Is it any number as an exponent that leaves the radicand the same? Could you please show me an example? thanks,

**Algebra B**

What is 1.11211211111221312211131122211113213211 What are the next digits. I saw a diagram but it was in french, so I did not understand the progression.

**Algebra B**

When a root is not a real number, what kind of number is it?

**Algebra B**

x-4/x+3 = x-1/x+2 Solve the equation for x. Thank you

**chemistry**

how many mL of watel should be added to yeild a soultion that has a concentration of .125 M when you start with a 250 mL soultion of 1 M AgNO3?

**business**

Thank you

**business**

You are writing to alumni of fraternity raising money for a scholarship. if you cannot personalize the letters, what would be the best salutation? A) Dear Brother B) Dear Sir C) Dear wealthy Alumnus D) Dear Alpha Kappa Psi Member My answer is D, but i am not really sure.

**Algebra II**

The base of a triangle is 8 cm greater than the height. The area is 24cm^2. What is the base and height?

**algebra**

a^2 + a - 240

**Algebra II**

Suppose a market research company finds that at a price of p = $20, they would sell x=42 tiles each month. If they lower the price to p = $10, them more people would purchase the tile, and they can expect to sell x = 52 tiles in a month's time. Find the equation of the lin...

**english**

what is the subject and veb in this sentence? a rumor has been spreading about the possible closing of the plant.

**Algebra B**

Is 25+20y+ 4y² a trinomial square?

**term paper**

what is the significance of prayer in school.

**Algebra**

Thank you, I could not remember the formula to use. this is what I got: M = 1 + 7/ 9 - 10 = 8/-1 I'm still not sure what the slope is. Thanks in advance for you help.

**Algebra**

Find the slope, if it exists, of the line containing the pair of points (9,1) and (10,-7) The slope m = __ or the slop is undefined

**algebra**

Train A and B are traveling in the same direction on parallel tracks. Train A is traveling at 100 mph and train B is traveling at 110 mph. Train A pases a station at 4:10 a.m. If train B passes the same station at 4:22 a.m., at what time will train B catch up to train A?

**Algegra**

-3y and postive 3y cancel each other out, leaving 4 = 9, which is false. So that means that there is not solution?

**Algegra**

I didn't mention... Is the solution an ordered pair or is there no solution

**Algegra**

Solve the following systemof equations x + 3y = 9 x = 4 - 3y

**Business communications 1**

thanks

**Business communications 1**

1. develop, reduce, increase 3. come, share, express 4. pay, fill out i will go for number 4

**Business communications 1**

which of the following is not an example of a parallel structure? 1. yoga can help you develop flexibility, reduce stress, and increase relaxion. 2. Learn hot to analyze business audiences, improve your style, and edit thouroughly. 3. you are all encouraged to come and share i...

**physics**

The Earth has a radius of about 6.38 ´ 103 kilometers at the equator and rotates 360° every 24 hours. The angular displacement of a person standing at the equator for 8.0 hours is:

**Business**

the primary audience for your mrssage is made up of? a. decision makers or opinion molders in an organization b. everyone who receives it c. individuals with highest status in an organization d. people who represent the opinions or attitudes of the majority

**Spanish**

46. A 47. C 48. A 49. D you were right on them

**calc.**

The centripetal acceleration of a particle moving in a circle is a=V^2/r where V is the velocity and r is the radius of the circle. Approximate the maximum percent error in measuring the acceleration due to errors of 3% in velocity and 2% in radius.

**Calc.**

Find the minimum cost of producing 20,000 units of a product, where x is the number of units of labor (at$48 per unit) and y is the number of units of capital (at $36 per unit). P(x,y)=100x^.6y^.4

**statistics**

The average math SAT score is 500 with a standard deviation of 100. A particular high school claims that its students have unusually high math SAT scores. A random sample of 50 students from this school was selected, and the mean math SAT score was 530. Is the high school just...

**ap physics**

189 m/s

**Physics**

a soccer ball kicked with a force of 14.1 N accelerates at 6.8 m/s^2 to the right. What is the mass of the ball? in units of Kg.

**Statistics**

Suppose x is a uniform random variable with c=10 and d=90. Find the probability that a randomly selected observation exceeds26.

**chemistry**

how many moles of SO3 will be produced from 9.1 mol O2

**geometry/algebra**

I asked this question yesterday, and I'm trying to understand it since I got the wrong answer - please explain: You need to make a soda can with a volume of 29 cubic inches. Find the surface area. calculate the following: a) How much material is needed if the can's rad...

**Geometry**

Find the measure of each side of equilateral triagnle RST with RS = 2x + 2, ST = 3x, and TR + 5x -4.

**algebra**

Thank you!!

**algebra**

Express the amount of material needed to make a can as a function of the radius. In other words, find a function A(r) such that A represents the surface area (in square inches) of hte cylinder and r is the radius (in inches). my answer (not sure) A(r) = r^2 + 2r + 29 ?

**algebra/geometry please correct me**

sorry: ð = pi

**algebra/geometry please correct me**

You need to make a soda can with a volume of 29 cubic inches. Find the surface area. calculate the following: a) How much material is needed if the can's radius is 2 inch? Answer with the help of Reiny, but doing it with a different radius to make sure I got it. let the he...

**Finance**

Sauerfood company has decided to buy a new computer system with an expected life of 3 yrs. the cost is 150,000.the comapny can borrow $150,000 for 3yrs at 10% annual interest or for one yr at 8% annual interest. How much wld sauer save in interest over the 3 yr life of the com...

**Algebra**

= 64.28319 in^2 thank you!

**Algebra**

You need to make a soda can with a volume of 29 cubic inches. Find the surface area. calculate the following: a) How much material is needed if the can's radius is 1 inch?

**Science-Organelle**

What is the structure of chromatin?

**U.S. Government**

1st Amendment help. How can one argue persuasively that the status quo of Defamation (i.e., New York V. Sullivan) should be changed. Any help or direction one could give, would be appreciated.

**Biochem**

When trying to purify a protein using column chromatography, what happens to the mass of the protein eluted from the column if you accidentally run it dry? Would it be more or less? Thanks.

**U.S. Government**

1st Amendment help. How can one argue persuasively that the status quo of Defamation (i.e., New York V. Sullivan) should be changed. Any help or direction one could give, would be appreciated.

**math**

clue#1 You will use exactly eleven base-ten blocks. Clue#2 The number is less than 300. Clue#3 The digit in the tens place is one less than the digit in the ones place. Who am I? Mom of second grader, can't help her with this!! Can you explain how to figure the answer?

**8th grade**

Ryan left musuem and drove south. Gab left 3 hrs later driving 42 km/h to catch up to him. After 2 hrs gab finally caught up. find Ryan's averae speed?

**Chemistry **

You have a stock solution of 13.4 M NH3. How many milliliters of this solution should you dilute to make 100.0 mL of 0.100 M NH3

**spelling**

what is meaning of groan

**business law**

In what jurisdiction, state and/or federal, and venue will a driver from Florida sue a driver from Washington who collided with him/her in Oklahoma?

**Physics**

I need help with this question...A skateboarder, starting from rest, rolls down a 12.0-m ramp. When she arrives at the bottom of the ramp her speed is 8.90 m/s. (a) Determine the magnitude of her acceleration, assumed to be constanIf the ramp is inclined at 21.5° with resp...

**health**

What are the limitstions of what an organizational chart communicates

**algebra**

The heights, h of the students in the chorus at Central Middle School satisfy the inequality absolute value of h-57.5/2< or = 3.25. Determine the interval in which these heights lie.

**3rd gr math**

tyrell says $750 is about $800. Sara says $750 is about $700. Who is correct? Explain? Its number sense.

**3rd grade math**

Mrs.jones has 30 tomatoes plants. she wants to plant the same number of plants in each row of her garden. explain how she could decide the number of rows to plant.

**algebra**

explain why 1,734 is greater than 175?

**algebra**

here is the question: I am confused about the steps I need to follow to be able to complete this question some explanation will be appreciated :) In a Multiple - choice examination of 25 questions, four marks are given for each correct answer and two marks are deducted for eac...

**math**

whats the sum of a number and -5 and a number

**health**

Post a 250- to 300-word response to the following: What are the major differences between inpatient and outpatient hospital services? Describe how these differences affect the coding process and provide examples.

**social studies**

What do you call maps thatshow features that humans have created on Earth's surface?

**social studies**

What are maps called that focus on specific ideas?

**Nutition**

"The body absorbs lipids mostly within the small intestine. The gallbladder secrets a chemical called bile to aid in the breakdown of this fat. From there the fat is broken down farther by the enzymes the pancreas makes. The mixture of "fatty acids, partially digeste...

**Nutrition**

How do lipids move through the body do they can be digested and absorbed? How are lipids stored in the body?

**Essentials of Managerial Communication**

Thank you that helped!

**Essentials of Managerial Communication**

Discuss how technology could be used to facilitate cross-cultural communication.

**biology**

thanks : )

**biology**

What is the source of energy driving the hydrolic cycle? a. evaporation of the ocean water b. heat conducted from the earth's core to the surface c. radiant heat from the sun d. air currents returning to the earth's surface I chose a) evaporation of the ocean water. bu...

**science**

a 5.o kg book is sitting on a table. which describes the forces acting on the book? a)there are no forces acting on the book b)the net force on the book is zero Since the weight of the book is cancelled out by the support of the table. does that mean a) there are no forces act...

**science**

a certain's plant root contain higher concentrations of nitrate than the soil that surrounds them. Which mechanism explains the movement of nitrates form the soil into the plant's roots? a)osmosis b)facilitated diffusion c)active transport d)filtration I chose c) activ...

**English**

Thank you : )

**English**

Deep (1)cognition deep thinking, is vital. (1) a)no change b)cognition, deep thinking, is vital. c)cognition, deep thinking is vital. d cognition: deep thinking, is vital. On this one I answered a) using a comma to separate each description. was that correct?

**English**

wonderful --thanks ; )

**English**

(1)Once the lecture starts:let your mind dart (2)ahead during pauses to anticipate what is next. (1) a) No change b)Once the lecture starts, let your mind c)Once the lecture starts; let your mind I chose b) (2) a)no change b)ahead (during pauses) c)ahead, during pauses d)ahead...

**English**

yayy I got it right then : ) thanks!

**English**

no storms in the ______ future. a)forseable b)foreseeable I chose b)foreseeable but when I looked it up online both came up in the spelling. which is correct? thanks

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