Friday

July 31, 2015

July 31, 2015

Number of results: 61,499

**college stats**

iN manoa Valley on the island of Oahu Hawaii the annual rainfall averages 43.6 inches with a standard diviation 7.5 inches. for a given year, find the probability that the annual rainfall will be..(solve for a,b,and c) show work a)more than 53 inches b)less than 28 inches c)...
*March 21, 2013 by luvmmmath*

**Physics**

If an automobile had a 100%-efficient engine, transferring all of the fuels energy to work, would the engine be warm to your touch? Would its exhaust heat the surrounding air? Would it make any noise? Would it vibrate? Would any of its fuel go unused? Discuss.
*September 22, 2013 by Miss Angie*

**Calculus**

you have 1000 yards of fencing and you plan to use the fencing to make 2 enclosures, one circular and one a square. How much of the 1000 yard of fencing should be used for each region if you want to maximize the combined area of both regions Let x yards of fence be used for ...
*April 30, 2012 by James*

**Calculus**

you have 1000 yards of fencing and you plan to use the fencing to make 2 enclosures, one circular and one a square. How much of the 1000 yard of fencing should be used for each region if you want to maximize the combined area of both regions Let x yards of fence be used for ...
*April 30, 2012 by James*

**maths**

In a test there were 25 multiple-choice questions. They were marked as follows: 2 marks for each correct answer 0 marks for a non-attempt 1 mark for an incorrect answer. Sarah attempted 4 5 of the questions and received 22 marks. How many questions did she answer correctly?
*October 12, 2010 by Jannie*

**maths**

In a test there were 25 multiple-choice questions. They were marked as follows: 2 marks for each correct answer 0 marks for a non-attempt -1 mark for an incorrect answer. Sarah attempted 4 5 of the questions and received 22 marks. How many questions did she answer correctly?
*October 15, 2010 by Jannie*

**Language Arts CHECK ANSWERS**

3. Everyone admired the grandeur of A. the rose garden. B. the mountains. ** C. the car. 10. Which sentence corrects the following sentence? Isnt that she by the side of the pool? A. Is that her by the side of the pool? B. Is that hers by the side of the pool? C. The sentence ...
*May 29, 2014 by Anonymous*

**Biotech**

The dynamic method is used to measure kLa in a fermentor operated at 30degC. Data for dissolved-oxygen concentration as a function of time during the re-oxygenation step is given (table with time (s) and CAL (% air saturation)). The equilibrium concentration of oxygen in the ...
*October 30, 2012 by MGob*

**algebra**

Can someone please help me with these problems? Write (27a^-3)^-2/3 in simplest form. Solve log(6x+11)=2. thanks Let me see your work, we can start from there. Alright! :D (27a^-3)^-2/3 =the cubed root of (27a^-3)^-2 =the cubed root of 27^-2a^6 i figured out how to do the ...
*June 2, 2007 by Lillian*

**biology**

Explain how respiration and the circulatory system work together when an individual is exercising. Does tissue need oxygen at a higher rate? Does tissue need to void CO2 at a higher rate? Does the heart pulse speed up? Does the breathing rate increase?
*June 7, 2007 by Gabrielle*

**physics**

A basketball player makes a jump shot. The 0.650-kg ball is released at a height of 1.90 m above the floor with a speed of 8.00 m/s. The ball goes through the net 3.10 m above the floor at a speed of 3.90 m/s. What is the work done on the ball by air resistance, a ...
*October 30, 2007 by Taylor*

**Algebra**

Steve is making crafts to sell at a benefit. It takes him 3/4 of an hour to make a trivet and 1/2 hour to make a wooden spoon, He has 3 hours to work. Write an equation to show the relationship between how many trivets and how many spoons Steve can make in 3 hours.
*January 17, 2008 by Keishia*

**Math**

At a club play, 117 tickets were sold. Adults' tickets cost $1.25 and children's tickets cost $0.75. In all, $129.75 was taken in. How many of each kind of ticket were sold? I don't know how to set up the equation. Work Done Is it: 1.25x + 0.75y=129.75 this is what I've done ...
*October 26, 2009 by Esther*

**Physics**

A single conservative force acts on a 5.00 kg particle. The equation Fx = (2x + 4) N describes this force, where x is in meters. As the particle moves along the x axis from x = 1.40 m to x = 5.80 m, calculate the following. (a) the work done by this force on the particle (b) ...
*February 6, 2010 by ucieng*

**AP PHYSICS**

A basketball player makes a jump shot. The 0.700 kg ball is released at a height of 1.90 m above the floor with a speed of 7.00 m/s. The ball goes through the net 3.10 m above the floor at a speed of 3.70 m/s. What is the work done on the ball by air resistance, a ...
*November 13, 2010 by Indina*

**AP PHYSICS**

A basketball player makes a jump shot. The 0.700 kg ball is released at a height of 1.90 m above the floor with a speed of 7.00 m/s. The ball goes through the net 3.10 m above the floor at a speed of 3.70 m/s. What is the work done on the ball by air resistance, a ...
*November 14, 2010 by Brennan*

**AP Physics**

A basketball player makes a jump shot. The 0.700-kg ball is released at a height of 2.00 m above the floor with a speed of 7.70 m/s. The ball goes through the net 3.00 m above the floor at a speed of 3.10 m/s. What is the work done on the ball by air resistance, a ...
*November 21, 2010 by Sierra*

**Math**

A string is cut in half,and one of the halves is used to bundle newspapers. Then one fifth of the remaining string is cut off. The piece left is 8 feet long. How long was the string originally? Please work this out. The anwser is 20 ft. THANKS
*December 7, 2010 by Melea*

**Small Group Communication**

Regulating participation, climate making, and maintaining mutual respect are all part of the ___________. task domain, interpersonal domain, procedural domain, work domain, or life skills domain. I believe this is the life skills domain.
*December 29, 2011 by Jazmyne*

**Statistics**

2. You are given the following data. Number of Absences Final Grade 0 93 1 90 2 79 3 66 4 60 5 56 - Find the correlation coefficient for the data. - Find the equation for the regression line for the data, and predict the final grade of a student who misses 3.5 days. Show all ...
*December 30, 2011 by Lauren *

**Probability**

A card is drawn from a standard deck of cards. Find P(A U B) in each part. A= {getting a heart}, B= {getting an even number} A= {getting a club}, B= {getting a red card} A= {getting an ace}, B= getting a black card} A= {getting a prime}, B= {getting a diamond} Can you please ...
*February 15, 2012 by christy*

**physics**

A basketball player makes a jump shot. The 0.585 kg ball is released at a height of 2.14 m above the floor with a speed of 7.15 m/s. The ball goes through the net 3.10 m above the floor at a speed of 4.19 m/s. What is the work done on the ball by air resistance, a ...
*February 19, 2012 by Harry*

**business**

Can anyone tell me where i might be able to print a copy of a proposal for a small construction job. In my business class we need to bid on a job and I have been looking for sample proposal bid or a proposal where I can simply add the work that will be performed Thank you,
*July 17, 2012 by RT*

**physics**

A basketball player makes a jump shot. The 0.581 kg ball is released at a height of 2.02 m above the floor with a speed of 7.14 m/s. The ball goes through the net 3.10 m above the floor at a speed of 4.07 m/s. What is the work done on the ball by air resistance, a ...
*October 18, 2012 by Anonymous*

**work and energy(physics)**

A mass m = 12.0 kg rests on a frictionless table and accelerated by a spring with spring constant k = 4597.0 N/m. The floor is frictionless except for a rough patch. For this rough path, the coefficient of friction is μk = 0.49. The mass leaves the spring at a speed v = 3...
*November 2, 2012 by Anonymous*

**Physics **

One mole of an ideal gas initially at a temperature of Ti = 7.4C undergoes an expansion at a constant pressure of 1.00 atm to eight times its original volume. (a) Calculate the new temperature Tf of the gas.______J (b) Calculate the work done on the gas during the expansion....
*November 26, 2012 by Sally*

**physics**

A 2 kg mass falls 40 m and buries itself into the ground 0.40 m. Find: a) How much work was done by gravity, b) How much potential energy was lost, and c) What was its speed when it hit the ground, and d) the average force causing the mass to stop once it hit the ground.
*November 28, 2012 by Ted*

**Math ~CHECK MY WORK~**

You have $60 in your wallet and want to buy some new CDs. If the CDs are $11 each, what number of CDs, x, can you buy? Write and solve an inequality. Then explain your answer. My Answer: 11x <= 60 divde by 11 x <= 60/11 or 55/11 x is an integer x<=5 5 CD's, which will...
*January 16, 2014 by Wendy *

**Algebra II**

help please There are 12 red checkers and 3 black checkers in a bag. Checkers are selected one at a time, with replacement. Each time, the color of the checker is recorded. Find the probability of selecting a red checker exactly 7 times in 10 selections. Show work.
*April 23, 2014 by Me and I*

**Algebra ll**

Help me with this please There are 12 red checkers and 3 black checkers in a bag. Checkers are selected one at a time, with replacement. Each time, the color of the checker is recorded. Find the probability of selecting a red checker exactly 7 times in 10 selections. Show your...
*April 24, 2014 by Me and I*

**physics**

A basketball player makes a jump shot. The 0.600-kg ball is released at a height of 2.13 m above the floor with a speed of 7.55 m/s. The ball goes through the net 3.10 m above the floor at a speed of 3.95 m/s. What is the work done on the ball by air resistance, a ...
*October 3, 2014 by Anonymous*

**physics**

A basketball player makes a jump shot. The 0.610-kg ball is released at a height of 1.90 m above the floor with a speed of 7.08 m/s. The ball goes through the net 3.04 m above the floor at a speed of 4.29 m/s. What is the work done on the ball by air resistance, a ...
*October 10, 2014 by Anonymous*

**Physics**

A basketball player makes a jump shot. The 0.580-kg ball is released at a height of 1.90 m above the floor with a speed of 7.18 m/s. The ball goes through the net 3.05 m above the floor at a speed of 4.23 m/s. What is the work done on the ball by air resistance, a ...
*October 11, 2014 by Steven*

**Physics Help Please**

A 35-mm camera equipped with a 40-mm focal length lens is used to photograph a tree 17 m tall. If a 32-mm high image of the tree on the CCD sensor is required, how far should the camera lens be from the tree? Show Work Please! Thank you so much!
*May 2, 2015 by Need Help Urgent*

**Physics Help Please**

A 35-mm camera equipped with a 40-mm focal length lens is used to photograph a tree 17 m tall. If a 32-mm high image of the tree on the CCD sensor is required, how far should the camera lens be from the tree? Show Work Please! Thank you so much!
*May 3, 2015 by Need Help Urgent*

**Math**

What is the definition or theorem if ray nm perpendicular to line gh, then angle nmp and angle pnh are complementary? I'm not entirely sure where you have p situated, but I 'think' I know from the context of the question. That would be one definition of complementary angles. ...
*September 19, 2006 by Brandan*

**Chemistry**

write the balanced chemical equation for reaction the following chemical reaction ozone gas, O3 , reacts with 3,3,4,4,5,5-hexamethyl-1-hexyne, H-CC-C(CH3)2-C(CH3)2-C(CH3)2-CH3 to produce carbon dioxide gas, CO2 , and water gas , H2O . When balancing the equation , use the ...
*March 12, 2012 by Susan*

**English**

Can you please tell me if the following sentences are correct? They all refer to Shakespeare's The Merchant of Venice. Thank you. 1) The man who marries Portia will be the one who chooses the correct casket. 2) Shylock is notorious for charging very high interest rates. 3) He ...
*September 6, 2010 by Franco*

**Business-EASY**

5. Click on the Show Chart link to the right of the company name and description. Select the monthly share price graph and take a screen shot. Include the screen shot in your submission. Describe what has happened to the share price in the last year I chose the Company Avon, ...
*March 18, 2011 by Anonymous*

**Elem. Ed.**

Which requires a child's coordination with speech and movement? A. puppet play and storytelling B. finger plays and flannel boards C. flannel boards and storytelling D. finger plays and puppet play I am thinking (A) puppet play and storytelling, but not real sure. Please,help!
*September 18, 2007 by Anonymous*

**Math Please Help me!!!**

3x^2+17x+10 *You have to factor completley but I don't know how too.Please help.! (3x+2 )(x + 5) Factoring asks this question: what two factors of 10 add to 17 when one is multiplied by three? Here is how you factor. Place two sets of parentheses. ( ) ( ) To get 3X^2, we may ...
*January 24, 2007 by margie*

**physics**

A student conducted an experiment to determine the resistance of a lightbulb. while performing the experiment the student noticed that the lightbulb began to glow and became brighter as she increased the voltage. of the factors affecting resistance, which factor caused the ...
*May 20, 2007 by koeit*

**Algebra II**

Find the solution if possible. If there is not enough information to solve the problem or if it has no solution, say so. If extra information is given, identify it. 14. A collection of 30 coins worth $5.50 consists of nickels, dimes, and quarters. There are twice as many dimes...
*August 24, 2008 by Emily*

**Chemistry**

Write balanced equations for the formation of [Ni(NH3)6][BF4]2 starting from an anhydrous sample of nickel(II) choride hexahydrate. (3 equations necessary) I am slightly confused by this. I think the starting sample has the formula [Ni(H20)6]Cl2 Would this react with ammonia...
*March 11, 2009 by Alice*

**Pre-Calc**

An open box is formed by cutting squares out of a piece of cardboard that is 22 ft by 27 ft and folding up the flaps. What size corner squares should be cut to yield a box that has a volume of less than 235 cubic feet? I know that the size corner squares are .42 and 9.46. My ...
*September 24, 2009 by MUFFY*

**Social Studies**

1.Who were the members of the Triple Alliance? The Triple Entente? 2. What single event set in motion the start of world war 1. 3. Which of the forces at work in Europe played the greatest role in helping to prompt the outbreak of World War 1? 4. Do you think World War 1 was ...
*September 2, 2009 by Chris*

**physics**

A massless spring with spring constant 16.7 N/m hangs vertically. A body of mass 0.220 kg is attached to its free end and then released. Assume that the spring was unstretched before the body was released. How far below the initial position does the body descend? please show ...
*May 4, 2011 by Joan*

**AP Chem**

An aqueous solution contains 4.50 g of calcium chloride, CaCl2, per liter. What is the molarity of CaCl2? When calcium chloride dissolves in water, the calcium ions, Ca^+2, and chloride ions, Cl^-, in the crystal go into the solution. What is the molar concentration of each ...
*November 3, 2008 by Anna*

**PLZ help!! Stats....**

In testing a new drug, researchers found that 10% of all patients using it will have a mild side effect. A random sample of 14 patients using the drug is selected. Find the probability that: (A) exactly two will have this mild side effect (B) at least three will have this mild...
*October 25, 2011 by Jennifer*

**Can u plz help me PsyDag?? Stats**

In testing a new drug, researchers found that 10% of all patients using it will have a mild side effect. A random sample of 14 patients using the drug is selected. Find the probability that: (A) exactly two will have this mild side effect (B) at least three will have this mild...
*October 25, 2011 by Jennifer*

**Calculus**

The power P (in W) generated by a particular windmill is given by P = .015 V^3 where V is the velocity of the wind (in mph). Find the instantaneous rate of change of power with respect to velocity when the velocity is 5.7 mph. P = 0.015 V^3 dP/dV = 0.045 V^2 (in units of Watts...
*February 13, 2007 by Anonymous*

**Math: Calculus**

Estimate the area under the graph of f(x)=3x^3+5 from x=-1 to x=4, first using 5 approximating rectangles and right endpoints, and then improving your estimate using 10 approximating rectangles and right endpoints. I'm having problem with using the midpoint to find the area. ...
*November 12, 2010 by REALLY NEED HELP!!!!*

**AP Calculus AB**

the temperature of a 10m long metal bar is 15 degrees celcius at one end and 30 degrees celcius on the other end. Assuming that the temperature increases linearly from the cooler end to the hotter end, what is the average temperature of the bar? Also, explain why at least one ...
*February 13, 2011 by Destinyyy*

**calc**

a ball with mass 0.15 kg is thrown upward with initial velocity 20 m/sec from the roof of a building 30 m high. there is a force due to air resistance of |v|/30, where velocity v is measured in m/sec. a. find the maximum height above the ground the ball reaches. b. find the ...
*November 9, 2008 by cyrus*

**calculus**

1. Consider a projectile, say a frictionless teddy bear, which is thrown at an angle of theta with an initial velocity of v0. a) For a fi xed angle, and the maximum height of the teddy bear. b) Calculate the distance that the teddy bear travels before returning (gently, ...
*April 2, 2011 by andrew*

**calculus**

Find a unit vector U such that the rate of change of f in the direction of U at the given point is maximum. point being (3,5,pi) I know hos to do this when given a direction but since im asked to ind the unit vector first it kinda throws me off. do i just use my point? like ...
*March 8, 2012 by Joe*

**calc**

I was given a decreasing concave down graph of the integral F(x) from 0-8. i have to say whether the following are greater then, less then,equal to, or unable to determine each other 1. T (greater then) M 2. T (greater then) R 3. M (less then) S 4. S ? actual integral where t=...
*January 30, 2008 by sarah*

**CALC**

I was given a decreasing concave down graph of the integral F(x) from 0-8. i have to say whether the following are greater then, less then,equal to, or unable to determine each other 1. T (greater then) M 2. T (greater then) R 3. M (less then) S 4. S ? actual integral where t=...
*January 30, 2008 by sarah*

**metric system**

say you have a level container that is 10cm by 10cm by 10cm. full of water, it would weight one kg. but say you can put no more than 400g into it. say you have only a metric ruler to determine this. how high can you fill the container? my partial answer: i am not sure at all ...
*June 20, 2010 by amy*

**Calculus**

using the demand function p = 41 − 0.04 q instead of the one given in your book. Round your numeric answers to one decimal place. a) Write the revenue as a function of production, q. R(q) = b) What production level maximizes revenue? q = c) What price corresponds to this...
*November 3, 2010 by Erika*

**Calculus**

using the demand function p = 41 − 0.04 q instead of the one given in your book. Round your numeric answers to one decimal place. a) Write the revenue as a function of production, q. R(q) = b) What production level maximizes revenue? q = c) What price corresponds to this...
*November 3, 2010 by Erika*

**Pre Calculus**

The logistic growth function P(t)= 160/ 1 + 9e^-0.165t describes the population of the endangered species of elk "t" years after they were introduced into the habitat. a. How many elk were initially introduced into the habitat? b. How many elk are expected after 6 years? What ...
*November 20, 2014 by Brianna*

**Pre Calculus**

Use one of the identities cos(t + 2k) = cos t or sin(t + 2k) = sin t to evaluate each expression. (Enter your answers in exact form.) (a) sin(17/4) (b) sin(−17/4) (c) cos(17) (d) cos(45/4) (e) tan(−3/4) (f) cos(7/4) (g) sec(/6+2) (h) csc(2 −/3)
*March 10, 2012 by Stephanie823*

**Pre Calculus**

Use one of the identities cos(t + 2k) = cos t or sin(t + 2k) = sin t to evaluate each expression. (Enter your answers in exact form.) (a) sin(17/4) (b) sin(−17/4) (c) cos(17) (d) cos(45/4) (e) tan(−3/4) (f) cos(7/4) (g) sec(/6+2) (h) csc(2 −/3)
*March 10, 2012 by Stephanie823*

**Grammar ***CHECK MY WORK PLEASE*****

What are the three main parts of a research report? a) Title, body, conclusion ********* b) Introduction, body, sources c) Introduction, body, conclusion d) Introduction, evidence, conclusion
*February 6, 2014 by Jenny*

**geometry**

you have been asked to help build a rectangular play area at the new tracy elementary school. you arrive at the site eager to begin. much to your suprise, the only things available to work with are two pieces of rope. Explain how you can use the rope to find the vertices of ...
*January 16, 2012 by Zeus*

**geometry**

you have been asked to help build a rectangular play area at the new tracy elementary school. you arrive at the site eager to begin. much to your suprise, the only things available to work with are two pieces of rope. Explain how you can use the rope to find the vertices of ...
*January 16, 2012 by Zeus*

**Chem**

In procedure B2, you will titrate a saturated solution to find out how much of the anion dissolved. Assume you we're able to dissolve about 0.12g of potassium hydrogen tartrate in 25.0 mL of water. For the titration, you will use 10.00mL of this sample. How many mL of 0.0500M ...
*March 8, 2013 by K*

**Math- fraction equations**

How would I solve this equation? d-1 = -1 1 ____ ___ 4 2 (d-1) divided by 4 = -1 and 1/2 Thanks, Ok, I'll set up your problem this way: (d-1)/4 = -1 1/2 -1 1/2 is the same as -3/2. Therefore: (d-1)/4 = -3/2 Multiply each fraction by a common denominator, which is 4: 4 [ (d-1)/...
*March 6, 2007 by Sarah*

**algebra**

simplify the expression. Use only positive exponents. 8x^2y^-2/x^-2y * (4xy^2)^-1/x^2y Something does not seem right in your terms. Are you saying that 8x is being taken to the 2y power and that all this being taken to the -2x power? Please clarify your terms, and we will do ...
*March 7, 2007 by kayla*

**biology**

If you have a gene pathway with three activities, say A, B and C, and you have a mutant where an area of the pathway is affected, what kind of experiment would allow you to distinguish if A, B or C is affected? Does it make sense to plate the mutant starting with the C source ...
*February 11, 2009 by CM*

**Science/Math**

If a barrier island that is 1km wide and 10km long loses 1.5 m of its width per year to erosion by a longshore current, how long will teh island take to loose one-fourth of its width. Please show step by step how to work this problem. Thank you
*February 27, 2009 by Dan1*

**chemistry**

Here is a following practice question on my study guide. i have no idea on how to do it. Any help would be appreciated! Thanks you. A solution contains 26.5g NaCl in 75.0g H2O at 20 degrees Celsius. Determine if the solution is saturated, unsaturated, or supersaturated. (The ...
*March 1, 2009 by Viki*

**Phyical Science**

I have several problems where I have the answer, but I need to know how to work it out. You guys are amazing. Any help would be appreciated. Problem: A series of ocean waves, each 6.0 m from crest to crest and moving past an observer at a rate of 2.0 waves per sedcond, has ...
*July 19, 2010 by Sam*

**intermediate algebra**

Evaluate the logarithmic equation for three values of x that are greater than 1, three values of x that are between 0 and 1, and at x=1. show your work. use the resulting ordered pairs to plot the graph. State the equation of the line asymptotic to the graph (if any) y= -log5...
*September 6, 2010 by chihuahualover2010*

**algebra**

Please help, very lost Evaluate the exponential function for three positive values of x, three negative values of x, and at x=0. Show your work. Use the resulting ordered pairs to plot the graph; submit the graph via the Dropbox. State the domain and the range of the function...
*September 11, 2010 by mar*

**Physics **

A fighter jet is launched from an aircraft carrier with the aid of its own engines and a steam-powered catapult. The thrust of its engines is 2.1 105 N. In being launched from rest it moves through a distance of 87 m and has a kinetic energy of 3.8 107 J at lift-off. What is ...
*November 13, 2010 by Patty*

**Physics**

A fighter jet is launched from an aircraft carrier with the aid of its own engines and a steam-powered catapult. The thrust of its engines is 2.10 105 N. In being launched from rest it moves through a distance of 87 m and has a kinetic energy of 4.30 107 J at lift-off. What is...
*November 11, 2012 by Donald*

**Physics**

A fighter jet is launched from an aircraft carrier with the aid of its own engines and a steam-powered catapult. The thrust of its engines is 3.82 x 105 N. In being launched from rest it moves through a distance of 57.2 m and has a kinetic energy of 5.71 x 107 J at lift-off. ...
*December 14, 2012 by Ricardo*

**Math**

Jackie has a babysitting business and works 4 days a week.She works 4 hours on Mondays afternoon , 3 hours on Tuesdays evenings, 5 hours on Fridays ,and 8 hours on Saturdays. She makes $16 an hour. How much money will Jackie have made after 6 weeks? Please show work!!!!!!!!!!!
*January 14, 2013 by Gorge *

**math**

solve the compound inequalities as demostrated being careful of how a negative x- term is handled in the solving process show all math work arriving at the solutions display a simple line qraph for each solution set as demostrated. -1<3+2x<11 (Your and compound ...
*March 5, 2013 by mace*

**chemistry **

MASS (GRAMS) Nac1- 0.9992 C12H22O11- 0.9822 NH4C1- 0.9510 C6H5OH- 0.9723 C9H20- 1.0038 *Find the Molar Mass (g/mol) for each * *Find the Moles of each element for each * *Find the Atoms of each element for each * - if possible show work and or equation set up to find answers
*November 8, 2013 by Jessica*

**Help Please!!!- Physics**

A plane flies due north (90 from east) with a velocity of 100 km/h for 3 hours. During this time, a steady wind blows southeast at 30 km/h at an angle of 315 from due east. After 3 hours, where will the planes position be relative to its starting point? Show your work.
*November 22, 2013 by Jacob*

**Physics**

A 1300kg car going 20m/s has to stop suddenly. The driver locks the brakes, and the car skids to a halt in a distance of 64m . What was the car's acceleration while stopping? How much work was done by friction to stop the car? What is the coefficient of kinetic friction ...
*October 9, 2014 by Anonymous*

**CHEMISTRY **

how to calculate the weight of solute req'd to prepare 1 liter of 1 normal of: a.) LiOH b.) phosphoric acid my work: formula= gew/L or w/ewxL i get their mw then divide it to their H/OH so i can get EW then multiply it to 1. a.) 24 g/mol/1 b.) 98g/mol/3 i dont know what's next...
*October 12, 2014 by Selle*

**Chemistry**

I'm having trouble understanding Boyle's Law and Dalton's law of partial pressures. Can anyone help me work this please? Thank you A sample of propane gas, C3H8, was collected over water at 22.5 C and 680. torr. The volume of the wet gas is 3.89 L. What will be the volume of ...
*November 8, 2014 by Katie*

**physics**

A 18.4 kg block is dragged over a rough, horizontal surface by a constant force of 126 N acting at an angle of 34.1 ◦ above the horizontal. The block is displaced 20 m, and the coefficient of kinetic friction is 0.123. The acceleration of gravity is 9.8 m/s 2 .Find the ...
*January 6, 2015 by allan*

**Homework Help Calculus**

Use linear approximation to estimate the amount of paint in cubic centimeters needed to apply a coat of paint 1/100cm thick to a hemispherical dome with a radius of 18 meters. I tried it but I keep getting the wrong answer.Here's what I did below: sphere: V = ⁴/₃&#...
*October 15, 2013 by Molly*

**science**

The following is a periodic table below All the letters are in squares The S = an empty square 13 Colums in total Questions: 1. What pair of elements is in the same period? D and R 2. Which pair of elemetns is in hte same family? K and F 3. Which element has the smallest ...
*November 4, 2007 by liz*

**chemistry PLEASE HELPPPP**

10.0 grams of carbon dioxide and 20.0 grams of oxygen are mixed in a 50.0 L container at 30.0 degrees celcius. What is the pressure of this mixture in mm Hg? I defined my variables. so i had Mass=30.0g Volume=50.0L Temperature=303 Kelvin pressure=x. then i used PV*GFM=mRT. (x...
*March 18, 2008 by Miley*

**chemistry please help!!**

4{C3H5(NO3)2}(l)--->6N2(g)+O2(g)+12CO2(g)+10H2O(g) If a dynamite of 100mL needs 3.5atm to explode, what minimum mass of C3H5(NO3)2 do I need to put in at 25 degree celcius? I tried to do this by finding the number of moles by the formula PV=nRT and then convert that into ...
*October 22, 2008 by ashley*

**math**

Sally invests some money at 6%/a compounded annually. After 5 years, she takes the principal and interest and reinvests it all at a 7.2%/a compounded quarterly for 6 more years. At the end of this time, her investment is worth 14,784.56.how much did sally originally invest? I ...
*January 13, 2009 by Mae*

**Spanish**

What do the following people like? Write the correct form of the verb gustar in each sentence. 1. A m la cena que prepara Sebastin. 2. A Patricia las hamburguesas, las papas fritas y los refrescos. 3. A nosotras la comida nutritiva. 4. A ustedes las manzanas y las uvas. 5. ...
*April 18, 2011 by Cierrah*

**Spanish**

What do the following people like? Write the correct form of the verb gustar in each sentence. 1. A m la cena que prepara Sebastin. 2. A Patricia las hamburguesas, las papas fritas y los refrescos. 3. A nosotras la comida nutritiva. 4. A ustedes las manzanas y las uvas. 5. ...
*April 18, 2011 by Cierrah*

**Chemistry**

A student began adding titrant to the acid solution, but stopped when she suddenly realized that she forgot to add the 3 drops of phenolphthalein. When she did, the solution immediately turned dark red! What can the student do to correct this error and salvage this trial, so ...
*October 27, 2013 by Matt*

**Calculus**

When air expands adiabatically (without gaining or losing heat), its pressure and volume are related by the equation where is a constant. Suppose that at a certain instant the volume is cubic centimeters and the pressure is kPa and is decreasing at a rate of kPa/minute. At ...
*October 26, 2010 by Jason*

**calculus**

An airplane flying west at 300 miles per hour goes over the control tower at noon, and a second airplane at the same altitude, flying north at 400 miles per hour, goes over the tower an hour later. How fast is the distance between the airplanes changing at 2:00 P.M.?
*January 17, 2012 by becca*

**Calculus**

What would the values of A, B, and C be in this problem? The tides in a particular bay can be modeled with an equation of the form d= A cos (Bt) + C, where t represents the number of hours since high-tide and d represents the depth of water in the bay. The maximum depth of ...
*August 22, 2012 by Jillian*

**Calculus**

According to the National Health Survey, the heights of adult males in the United States are normally distributed with mean 69.0 inches and standard deviation 2.8 inches. A. What is the probability that an adult male chosen at random is between 61 inches and 71 inches tall? B...
*November 3, 2013 by Robin*

**calculus**

No idea where to start The cost in dollars of producing x units of a particular camera is C(x) = x2 - 10000. (10 points) Find the average rate of change of C with respect to x when the production level is changed from x = 100 to x = 101. Include units in your answer. Find the ...
*December 16, 2014 by John*