Tuesday

April 28, 2015

April 28, 2015

**math**

The batting averages of the first three batters in the Eureka College women’s softball team lineup are .310, .301, and .277. If the first three batters are considered as the “lead-off group”, what is the batting average of the group? A. .301 B. .296 C. There is ...
*Wednesday, April 15, 2015 at 8:41pm*

**Math (ASAP)**

Write out the first 4 terms of the following sequence that is define recursively. a1=32 ak+1=1/2ak
*Wednesday, April 15, 2015 at 8:22pm*

**Chemistry**

Suppose you are assigned to prepare a buffer of 0.10M HNO2 (Ka=1.7 x 10^-4) and 0.10M NaNO2 by mixing equal volumes of both solutions. What is the pH of the resultant solution? How would I first start this question? I have no clue what the steps are to be frank.
*Wednesday, April 15, 2015 at 5:17pm*

**Science/Physics **

My question is you walk 3.9 kilometers to school. In gym, you do the 12 minute run and actually make it 2.4 kilometers. After school you walk your friend home first and then go home it is 3.1 kilometers farther than your morning walk to school. What was your total distance ...
*Wednesday, April 15, 2015 at 3:36pm*

**writting skills**

1. Which one of the following comes first in an online catalog entry? A. Title of the book B. Year of publication C. Call number of the book D. Author's last name Student Answer: B Answer: Incorrect Reference: 2. You've located three books on a topic you're ...
*Wednesday, April 15, 2015 at 3:30pm*

**english**

Hello I am having quite a bit of trouble trying to figure out a better way to answer this. 1. In the video, The Fates Present: Pyramus & Thisbe,There are parts of the animated version in which there is a character, who appears at the beginning of the animation first, and who ...
*Wednesday, April 15, 2015 at 12:08pm*

**science **

1. What do bone marrow and the epidermis have in common? They are both sites of new cell formation. They both contain structures that assist the body in cooling down if overheating occurs. They both contain or are associated with sensory neurons. They are both involved in ...
*Wednesday, April 15, 2015 at 10:43am*

**6th Grade Science Experiment**

Hi, forget my first post. Can someone please explain what a dependent and independent variable is? Thanks and I don't have too much time either.
*Wednesday, April 15, 2015 at 10:03am*

**statistics**

A tennis player makes a successful first serve 51% of the time. if she serves 9 times, what is the probability that she gets exactly 3 first serves in? assume that each serve is independent of the others.
*Wednesday, April 15, 2015 at 1:59am*

**Math**

How would you fine the relative extrema of f(x)=x+8^-x ? I know the first step is to find the derivative, which when I did I got f'(x)=1+[(-1)(ln(8))(8^-x)] Did I find the derivative correctly? And if I did, how do I find the zeroes of that??
*Tuesday, April 14, 2015 at 10:39pm*

** Writing Skills, **

1. Which one of the following comes first in an online catalog entry? A. Title of the book B. Year of publication C. Call number of the book D. Author's last name 2. You've located three books on a topic you're researching for an essay. The first thing you should ...
*Tuesday, April 14, 2015 at 10:05pm*

**6th grade math**

While battling a forest fire , Samuel was only able to get three hours of sleep during the first day. What was the percent of the day was Sam awake F. 87.5% G. 37.5% H. 90% J. 10%
*Tuesday, April 14, 2015 at 9:13pm*

**calculus multiple choice**

1.The region in the first quadrant bounded by the x-axis, the line x = ln(π), and the curve y = sin(e^x) is rotated about the x-axis. What is the volume of the generated solid? a: 0.906 b:0.795 c:2.846 d: 2.498 2.Find the average value of f(x)=2/x over the interval [1, 3...
*Tuesday, April 14, 2015 at 9:00pm*

**Chemistry**

when titrating 50 mL of .10M H2SO45 with .10 M NaOH, how many mL of NaOH will you have added to reach first equivalence point?
*Tuesday, April 14, 2015 at 8:43pm*

**Chemistry**

I am working on a five-part question and I just need help with the last part. I'm not sure where to begin with that one. I pasted the question and answers (for a-d) to the other parts below. Thank you! Consider the proposed mechanism for the reaction between nitrogen ...
*Tuesday, April 14, 2015 at 6:53pm*

**math**

find the first 3 term s of an arithmetic sequence in which the 21 term is -54 and the fifteenth term is -170
*Tuesday, April 14, 2015 at 5:25pm*

**Math**

Neil needs to cut 3 long boards into 9 smaller boards. The first is 10 ft, the second is 16 ft, and third is 18 ft. The table lists the smaller boards Neil needs. Use a drawing to show how he can divide the 3 boards so there is no waste.
*Tuesday, April 14, 2015 at 5:06pm*

**math**

Neil needs to cut 3 long boards into 9 smaller boards. The first is 10 ft, the second is 16 ft, and the third is 18 ft. The table lists the smaller boards Neil needs. Use a drawing to show how he can divide the 3 boards so there is no waste. Length of board Number needed 4 ft ...
*Tuesday, April 14, 2015 at 4:45pm*

**Reading**

This is the last question! OK here it goes. In which sentence about A Christmas Carol is the word conveyed used correctly? Marley first conveyed through Scrooge's doorknocker The Thin and Portly men conveyed donation's in Scrooge's office Marely conveyed the ...
*Tuesday, April 14, 2015 at 4:14pm*

**Maths**

Two flares are launched from a life raft. The height h of the first flare in metres above the sea is modelled by the formula h1= t2+t+1meters,and the second flare is h2=4-t where t is the time 12 in seconds after the flare is launched. Determine (i) Time taken and (ii) Height ...
*Tuesday, April 14, 2015 at 8:39am*

**Physics**

A train accelerates from the rest at the station A at a rate of 0.8 m/s2 for 25 s, the travels at constant velocity for 77.5 s before it comes to rest at the station B after period of retardation lasting 20 s. What is the distance between stations A and B, and the average ...
*Tuesday, April 14, 2015 at 4:16am*

**physics**

Choose one of the Laws of Thermodynamics (zeroth, first, second, or third) and give a brief summary of its development. Who is credited with "discovering" it and when? How did the four laws come to be ordered as they are? Please explain in detail
*Tuesday, April 14, 2015 at 2:55am*

**physics**

A particle starts moving from rest with uniform acceleration.It travels a distance x in first 2 sec and a distance y in the next 2 sec.Then Answer) y=3x
*Tuesday, April 14, 2015 at 12:46am*

**L.A**

The word aloof is an English word borrowed from Dutch. It's meaning is "at a distance". In which of the following sentences is the word used correctly? A. Anne's sociable nature made her aloof in new situations. B. When he first arrived at the secrete Annex, ...
*Tuesday, April 14, 2015 at 12:29am*

**calculus**

The base of a solid is the region in the first quadrant bounded by the graph of y = 3/(e^x) , the x-axis, the y-axis, and the line x=2. Each cross section of this solid perpendicular to the x-axis is a square. What is the volume of the solid?
*Monday, April 13, 2015 at 9:39pm*

**Mia**

A Screamingly Good Science Lesson Elizabeth Kibler 1Amusement park rides give us thrills, exhilaration, and delight. If you pay attention, these rides can give you something else—a science lesson. Roller coasters are amazing rides that can twist and veer until you scream...
*Monday, April 13, 2015 at 7:14pm*

**math**

A professor gave his 40 students a test with three questions. Every student answered at least one question. Ten student did not answer the first question, 14 did not answer the second question, and 12 did not answer the third question. If 18 students answered all three ...
*Monday, April 13, 2015 at 5:02pm*

**criminal justice**

In 1970, the District of Columbia passed the first __________ statute which authorized denial of bail to "dangerous" persons charged with certain offenses for up to 60 days.
*Monday, April 13, 2015 at 4:57pm*

**Algebra**

How do I answer this? Robert needs to cut four shelves from a board that is 2.5 meters long. The second shelf is 18 centimeters longer than twice the length of the first shelf. The third shelf is 12 centimeters shorter than the first shelf. The remaining shelf is 4 centimeters...
*Monday, April 13, 2015 at 4:37pm*

**Physics**

Ann, Sam and you take a trip to the orbiting International Space Station, bringing along a hula hoop that is 1.02 m in diameter (= 2R) and has a mass Mh = 2.0 kg. You are watching from a viewport while Sam and Ann go outside for a (space) walk. You see both Sam and Ann ...
*Monday, April 13, 2015 at 8:25am*

**Statistics **

I'm stuck on this homework question. If someone can just help get me started with the first one I'm sure I can do the rest. I'm just not sure how to begin. Thanks! 1. A production process produces 90% non-defective parts. A sample of 10 parts from the production ...
*Sunday, April 12, 2015 at 8:27pm*

**social studies 8th**

1. What was the cause of American leaders’ initial refusal to enter World War I? (1 point) They wanted to maintain the country’s isolationist policy.*** They were not certain the country had the resources to fight. The United States did not wish to side with the ...
*Sunday, April 12, 2015 at 5:30pm*

**Pre-calculus **

The sum of the first two terms of an arithmetic series is 13 and the sum of the four terms is 46. Determine the first six terms of the series and the sum of the first six terms.
*Sunday, April 12, 2015 at 2:44pm*

**physics- Space**

How does the amount of dark matter in the Universe compare to the amount of ordinary matter? In what way is dark matter similar to ordinary matter? In what way are they different? I got the first one which dark matter is 23% of the universe. But for the other questions, the ...
*Sunday, April 12, 2015 at 1:40pm*

**Maths help **

Two flares are launched from a life raft. The height h of the first flare in metres above the sea is modelled by the formula h1= t2+t+1meters,and the second flare is h2=4-t where t is the time 12 in seconds after the flare is launched. Determine (i) Time taken and (ii) Height ...
*Sunday, April 12, 2015 at 6:14am*

**Math**

As of the 2012 Summer Olympics, the world record for women's long jump is 24 feet, 8 inches. How much longer is the world record than Sheila's first jump? Express your answer in yards. Sheila first jump measured 3 yards, 2 feet, 8 inches. Do I convert to inches or ...
*Saturday, April 11, 2015 at 9:38pm*

**business mgmt**

A company looking for venture capitalist funding is deciding on the design of its operating system for its new phone. The first option is to simply buy the OS from another company. This would result in sales of either 10,000 units if the market is not crowded with similar ...
*Saturday, April 11, 2015 at 3:08pm*

**MATHSS PLESE HELP**

Two flares are launched from a life raft. The height h of the first flare in metres above the sea is modelled by the formula h1= t2+t+1meters,and the second flare is h2=4-t where t is the time 12 in seconds after the flare is launched. Determine (i) Time taken and (ii) Height ...
*Saturday, April 11, 2015 at 4:28am*

**algebra**

find 3 consecutive integers such that the sum of the squares of the first and second is 2 more than the third
*Friday, April 10, 2015 at 10:51pm*

**Math**

As of the 2012 Summer Olympics, the world record for women's long jump is 24 feet, 8 inches. How much longer is the world record than Sheila's first jump? Express your answer in yards. Sheila first jump measured 3 yards, 2 feet, 8 inches. Do I convert to inches or yards
*Friday, April 10, 2015 at 9:45pm*

**Math**

A manufacturer has determined that the weekly profit from the sale of x items is given by the function below. It is estimated that after t days in an week, x items will have been produced. Find the rate of change of profit with respect to time at the end of 7 days. P9x) = -x^2...
*Friday, April 10, 2015 at 8:58pm*

**Math Homework**

Sheila's first jump was 3 yards 2 feet 8 inches her second was 2 yards 1 foot 10 inches how much longer was her first jump? express your answer in inches I'm having a hard time setting this up
*Friday, April 10, 2015 at 7:03pm*

**Finance**

A bank is willing to give you a Rs1,000,000 home mortgage at 12% interest, compounded semiannually. The loan will be amortised over 25 years, but the interest rate is fixed for only the first 5 years. What is the monthly mortgage payment for the first five years? Rs 1000,000...
*Friday, April 10, 2015 at 12:59pm*

**statistics**

A nutritionist wants to conduct a study to validate the efficacy of an herb as an aid in weight loss. She randomly assigns half of a group of overweight persons to a treatment group who are given the herb with instructions for its use and a planned diet for six weeks. The ...
*Friday, April 10, 2015 at 9:19am*

**physics**

a car moves from A to B covering a distance of 1000km it covers the first 300km at 60km/h the next 400km at 80 km /h at what speed it should it cover the remaining distance so that achieve an average speed of 70km/h?
*Friday, April 10, 2015 at 7:19am*

**physics**

a car moves from car A to B covering a distance of 600km/h if it covers first 400km at 80km/h and the other remaining at 100km/h .What is the average speed for entire journey
*Friday, April 10, 2015 at 6:01am*

**Calculus**

During a certain epidemic, the number of people that are infected at any time increases at rate proportional to the number of people that are infected at that time. 1,000 people are infected when the epidemic is first discovered, and 1,200 are infected 7 days later. Write and ...
*Thursday, April 9, 2015 at 8:52pm*

**Math**

A manufacturer has determined that the weekly profit from the sale of x items is given by the function below. It is estimated that after t days in an week, x items will have been produced. Find the rate of change of profit with respect to time at the end of 7 days. P9x) = -x^2...
*Thursday, April 9, 2015 at 8:04pm*

**English**

Which of the following correctly uses a transitional word or phrase? A. First impressions are so important in both personal and professional life. Addison shaved off his beard. B. Kara has been happily trying lots of new activities lately. For example, she took up needlepoint ...
*Thursday, April 9, 2015 at 8:00pm*

**maths**

A G.P had its third term as 9 times its first term and its second term is one-twenty-fourth of its fifth term. what is its fourth term?
*Thursday, April 9, 2015 at 6:42pm*

**Calculus**

A manufacturer has determined that the weekly profit from the sale of x items is given by the function below. It is estimated that after t days in an week, x items will have been produced. Find the rate of change of profit with respect to time at the end of 7 days. P9x) = -x^2...
*Thursday, April 9, 2015 at 6:21pm*

**algebra**

How do I state which property of exponents justifies each step of this simplification?: 3^2x^6z^10/2^2y^18*x^4y^4z^4/5z^3*27z^6/2^2x^2y^3 Im really stuck on this problem, I've managed to figure out the first 5 problems but this one is troubling me.
*Thursday, April 9, 2015 at 5:12pm*

**math**

The 1st,5th,13th term of an arithmetic sequence are the first 3 terms of geometric sequence with a common ratio of 2. If the 21st term of the arithmetic sequence is 72, calculate the sum of the first 10 terms of the geometric sequence.
*Thursday, April 9, 2015 at 4:20pm*

**Calc AB**

Remember that f(x) must be one-to-one (only one y-value for each x-value) over the domain where f –1(x)is defined as a function. So, in some cases you must restrict the domain of f(x) so that it's one-to-one. There might be more than one section of domain that's ...
*Thursday, April 9, 2015 at 1:28pm*

**Chem**

If a .750g sample of magnesium chloride is dissolved in water and then treated with a silver nitrate solution how many grams of silver chloride should be collected? I don't understand what my first step should be. The balanced equation is MgCl2+2AgNO3=2AgCl+Mg (NO3)2 Do I ...
*Thursday, April 9, 2015 at 1:11am*

**physics**

An object is released from rest at an unknown height h above the ground. One second later a second object is released from rest at the same height. When the first object strikes the ground, the second is 20 m above the ground. What is the initial height h?
*Wednesday, April 8, 2015 at 8:58pm*

**History**

The question is based on "Democracy in America" by Alexis de Tocqueville: "Although private interest directs the greater part of human actions in the United States as well as elsewhere, it does not regulate them all. I must say that I have often seen Americans ...
*Wednesday, April 8, 2015 at 8:28pm*

**Accounting**

Adelphia Corporation, which uses absorption costing, just completed its first year of operations. Planned and actual production equaled 13,000 units, and sales totaled 11,700 units at $184 per unit. Cost data for the year are as follows: Direct material (per unit) $ 37 ...
*Wednesday, April 8, 2015 at 8:22pm*

**Math**

Which of the following is an example of an independent event? A. Choosing one sock at random from your drawer, putting it on and then choosing another at random. B. Flipping a coin and rolling a number cube. C. Choosing students at random for basketball teams. D. Removing a ...
*Wednesday, April 8, 2015 at 6:16pm*

**math**

these marbles are placed in a bag and two of them are randomly drawn what is the probability of drawing two pink marbles if the first one is placed back in the bag before the second draw thebag has 10 marbles.2 yellow.3 pink.5 blue
*Wednesday, April 8, 2015 at 2:34pm*

**Accounting**

Adelphia Corporation, which uses absorption costing, just completed its first year of operations. Planned and actual production equaled 13,000 units, and sales totaled 11,700 units at $184 per unit. Cost data for the year are as follows: Direct material (per unit) $ 37 ...
*Wednesday, April 8, 2015 at 2:31pm*

**reading**

In both "Miracles" and "in just-," the poets use images that appeal to the senses. In a paragraph, compare the use of imagery in the two poems. First, present images in each poem that appeal to the sense of sight, sound, and touch. Then state at least one ...
*Wednesday, April 8, 2015 at 1:51pm*

**science (chemistry)**

why does the pH of the acid solution initially increase very slowly when metal is first added to the acid solution, but gradually increase at a faster rate as the reaction proceeds to completion? I thought it may be because the metal is just then being completely dissolved but...
*Wednesday, April 8, 2015 at 1:38pm*

**english**

Identify the complements in the following sentences. Then, tell whether each complement is a predicate nominative, a predicate adjective, a direct object, or an indirect object. If a sentence does not contain a complement, write no complement. [1] My brother made Mom a ...
*Wednesday, April 8, 2015 at 1:33am*

**Art**

Drawing: girl in a southern German folk costume it's the first picture in Google search. How did the designer of the German folk dress use the principles of art? A. The designer repeats colors throughout the apron to create unity. B. The designer uses different colors to ...
*Tuesday, April 7, 2015 at 9:11pm*

**physics**

A worker has to move a rock with mass 50 kg on a stairway from the first floor to the second floor of a house. The second floor is 4.6 m above the first floor and the stairway has 18 steps. The rock is lifted from step to step. How much energy (in Joule) has to be spend to ...
*Tuesday, April 7, 2015 at 5:27pm*

**Physics**

A rescue helicopter is lifting a man (weight = 868 N) from a capsized boat by means of a cable and harness. (a) What is the tension in the cable when the man is given an initial upward acceleration of 1.83 m/s2? (b) What is the tension during the remainder of the rescue when ...
*Tuesday, April 7, 2015 at 3:23pm*

**check my answers please**

"President Lincoln’s Declaration of Emancipation, January 1, 1863" by Frances E. W. Harper 1 It shall flash through coming ages, 2 It shall light the distant years; 3 And eyes now dim with sorrow 4 Shall be brighter through their tears. 5 It shall flush the ...
*Tuesday, April 7, 2015 at 12:54pm*

**Math**

An airplane climbs 100 feet during the first second of takeoff. In each succeeding second it climbs 100 feet more than during the previous second. How many seconds does it take for the plane to reach an altitude of 12000 feet?
*Tuesday, April 7, 2015 at 12:21pm*

**Science**

1. What do bone marrow (the soft connective tissue that fills the internal spaces in bone) and the dermis (layer of the skin under the epidermis and over the hypodermis) have in common? (1 point) • They are both sites of new cell formation. • They both contain or are...
*Tuesday, April 7, 2015 at 9:09am*

**math**

In a contest , 2 participants were asked about their age . To test the strength of their math , they are asked to add their ages together. One answer 44 and the other gives 1280. The first obtained from the parse age with one another , while the second can multiply both their ...
*Tuesday, April 7, 2015 at 1:37am*

**social studiesssssssssssssssssssssssssssss**

2. Why did the United States enter World War I? (Choose all that apply.) (2 points) U.S. leaders wanted German territory. U.S. leaders wanted to aid German efforts in the war. U.S. leaders believed Germany had violated international law. The U.S. economy depended on ...
*Monday, April 6, 2015 at 11:18pm*

**ss need help**

1. Which four states seceded from the Union after Fort Sumter? (1 point) Kansas, Missouri, Arkansas, and Kentucky Virginia, Maryland, Kentucky, and West Virginia North Carolina, South Carolina, Georgia, and Florida Arkansas, Tennessee, Virginia, and North Carolina 2. What ...
*Monday, April 6, 2015 at 11:09pm*

**Accounting **

Bus Acquired Cost Salvage Value Useful Life in Years 1 1/1/13 $98,100 8,000 5 (straight-line) 2 1/1/13 129,000 11,900 5 (decline balance) 3 1/1/14 79,780 8,200 4 (units-of-activity) For the declining-balance method, the company uses the double-declining rate. For the units-of-...
*Monday, April 6, 2015 at 10:59pm*

**PLEASE HELP?????LANGAGUE ARTS**

13. What is the best paraphrase of the first stanza? (1 point) I have a special place at the river where the wind goes through my hair and the ripples run across the river. I sometimes fish at the river. Sometimes I think about my life when I look at the river. I sit on the ...
*Monday, April 6, 2015 at 10:02pm*

**Physics**

A rescue helicopter is lifting a man (weight = 868 N) from a capsized boat by means of a cable and harness. (a) What is the tension in the cable when the man is given an initial upward acceleration of 1.83 m/s2? (b) What is the tension during the remainder of the rescue when ...
*Monday, April 6, 2015 at 9:37pm*

**LA/READING(:**

13. What is the best paraphrase of the first stanza? (1 point) I have a special place at the river where the wind goes through my hair and the ripples run across the river. I sometimes fish at the river. Sometimes I think about my life when I look at the river. I sit on the ...
*Monday, April 6, 2015 at 9:33pm*

**history**

what are three things about Washington that made him the overwhelming favorite for the first president of the United States?
*Monday, April 6, 2015 at 9:24pm*

**Reading//LA**

"President Lincoln’s Declaration of Emancipation, January 1, 1863" by Frances E. W. Harper 1 It shall flash through coming ages, 2 It shall light the distant years; 3 And eyes now dim with sorrow 4 Shall be brighter through their tears. 5 It shall flush the ...
*Monday, April 6, 2015 at 9:16pm*

**algebra II**

if a pitcher is just as likely to throw a ball as a strike, find the probability that t11 of his first pitches are balls.
*Monday, April 6, 2015 at 8:05pm*

**AP CALC**

At any time t=>0 , in days, the rate of growth of a bacteria population is given by y' = ky, where y is the number of bacteria present and k is a constant. The initial population is 1500 and the population quadrupled during the first two days. By what factor will the ...
*Monday, April 6, 2015 at 7:36pm*

**English**

2.The child was reluctant to (access/venture) into the closet at night because he was unsure whether child-eating monsters really inhabited it in the dark Venture? 3.Th Members of the student council(circulated/convened) promptly affter school to finish their plans for the ...
*Monday, April 6, 2015 at 5:34pm*

**physics**

When using a double slit with light of wavelength 504 nm, it is observed that the 4-th order maximum of the interference pattern occurs at the positions of the first minimum in the diffraction pattern. If the width of the slits is 0.24 mm, what is in mm the separation of the ...
*Monday, April 6, 2015 at 1:47pm*

**Physics**

The university skydiving club has asked you to plan a stunt for an air show. In this stunt, two skydivers will step out of opposite sides of a stationary hot air balloon 2,500m above the ground. the second skydiver will leave the ballon 20 seconds after the first skydiver but ...
*Monday, April 6, 2015 at 11:36am*

**mastering quantum mechanics**

Problem 4: Variational principle and bounds (3 parts, 30 points) PART A (15 points possible) Consider a particle of mass m in a box of size L so the wave function vanishes at x=±L/2. Find an upper bound E∗ on the ground state energy Egs using a simple trial ...
*Monday, April 6, 2015 at 11:30am*

**physics**

A car speeds up uniformly from rest so that it has a velocity of 30ms -1 after 20 second.How far does the car travel in first 10 seconds?
*Monday, April 6, 2015 at 9:27am*

**physics**

A car speeds up uniformly from rest so that it has velocity of 30 ms-1 after 20 seconds. Question/ How far does the car travel in first 10 seconds?
*Monday, April 6, 2015 at 9:17am*

**physics**

A car speeds up uniformly from rest so that it has a velocity of 30 ms-1 after 20 second. How far does the car travel in first 10 second?
*Monday, April 6, 2015 at 8:58am*

**Physics**

Could someone show me how to work this? It's for a study guide I'm practicing, and I just can't seem to get the correct answer. The position of a 0.63 kg object attached to a spring is described by [x = (1.09 m) cos(3.11πt)] a) Find the object’s position ...
*Monday, April 6, 2015 at 8:24am*

**Physics**

The university skydiving club has asked you to plan a stunt for an air show. In this stunt, two skydivers will step out of opposite sides of a stationary hot air balloon 2,500m above the ground. the second skydiver will leave the ballon 20 seconds after the first skydiver but ...
*Sunday, April 5, 2015 at 11:52pm*

**physics **

A 2.0-gram bullet is shot into a tree stump. It enters at a speed of 3.00 x 104 cm/s and comes to rest after having penetrated 0.05 m in to the stump. What was the average force during the impact? Show all calculations leading to an answer. KE 1= 1/2*0.002kg*300^2m/s=30 j KE2=...
*Sunday, April 5, 2015 at 9:20pm*

**PHYSICS**

A net force of 47.0 N acts on a 53.0 kg body initially at rest. Compute the work (in joules) done by the force in the first second of time. Not sure where to start at all :(
*Sunday, April 5, 2015 at 8:19pm*

**Writing Skills, Part 3**

6. You have found an article in the Readers' Guide that you want to locate. What information would be least important in finding it? A. Subject heading B. Volume and page numbers C. Author's name D. Title of the article Student Answer: B Answer: Incorrect Reference: 7...
*Sunday, April 5, 2015 at 7:33pm*

**chemistry**

Why is the second derivative of a titration curve more accurate method to determine endpoints and equivalence points than the first derivative?
*Sunday, April 5, 2015 at 5:44pm*

**Math **

On Joe Martin's graduation from college, Joe's uncle promised him a gift of $12000 in cash or $900 every quarter for the next 4 years after graduation. If money could be invested at 8% compounded quarterly, which offer is better for Joe? I have done this problem but I ...
*Sunday, April 5, 2015 at 5:13pm*

**Probability**

Let Θ1 and Θ2 be some unobserved Bernoulli random variables and let X be an observation. Conditional on X=x, the posterior joint PMF of Θ1 and Θ2 is given by pΘ1,Θ2∣X(θ1,θ2∣x)= 0.26, if θ1=0,θ2=0, 0.26, if &#...
*Sunday, April 5, 2015 at 10:30am*

**chemistry ap**

Assume that 29.7 g of Al react with HCl according to the equation Al(s) + HCl(aq) −→ AlCl3(aq) + H2(g) at STP. How many moles of Al react? Remember to balance the equation first. Answer in units of mol. How many moles of H2 are produced? Answer in units of mol. How...
*Friday, April 3, 2015 at 9:51pm*

**pre calculus**

the downhill ski club is organizing a ski trip. group tickets for the ski trip are priced at 20 for the first 100 skiers and a discount of 5.00 for each of the skiers over 100. a) write a formula to find the average cost of x skiers. b)write a formula to find the average cost ...
*Friday, April 3, 2015 at 6:38pm*

**American History**

American soldiers first faced guerilla tactics during which war? A. Philippine-American War B. World War II C. Vietnam War D. Korean War I believe its A
*Friday, April 3, 2015 at 6:05pm*

**pre calculus**

the downhill ski club is organizing a ski trip. group tickets for the ski trip are priced at 20 for the first 100 skiers and a discount of 5.00 for each of the skiers over 100. a) write a formula to find the average cost of x skiers. b)write a formula to find the average cost ...
*Friday, April 3, 2015 at 3:54pm*