Questions Asked on
April 3, 2014

Chemistry Help Please!!!
Find Net Ionic equation for hydrolysis , Expression for equilibrium constant (Ka or Kb) and Value of (Ka or Kb) Net Ionic equations I've got NaC2H3O2 == CH3COO^+H2O >CH3COOH+OH^ Na2CO3 ==== CO3 + 2H2O → H2CO3 + 2OH Kb = [H2CO3] [OH]2 / [CO3]. Kb =
asked by Ahmed 
Math help!!!! Thanks in advance!!!!!!!!!!!
Activity BoysGirls Total Walk3 6 Bike 5 3 Skateboard 2  1 Total 1. How many students chose walking as their preferred method of transportation? 6 3 9 none of these 2. How many total students participated in the survey? 10 20 15 none of these 3.
asked by MsBadBut 
Algebra
A model rocket is launched from a roof into a large field. The path of the rocket can be modeled by the equation y = –0.06x² + 9.6x + 5.4 where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters,
asked by Sandra 
probability
The lifetime of a typeA bulb is exponentially distributed with parameter λ. The lifetime of a typeB bulb is exponentially distributed with parameter μ, where μ>λ>0. You have a box full of lightbulbs of the same type, and you would like to know
asked by A 
Algebra
A catapult launches a boulder with an upward velocity of 184 feet per second. The height of the boulder, (h), in feet after t seconds is given by the function h(t) = –16t² + 184t +20. How long does it take the boulder to reach its maximum height? What
asked by Sandra 
Spanish Sin a or a
I have to chose whether or not the sentence needs preposition a or no a (sin a) 1) ¿Conoces__ alguien que organice fiestas de aniversario? 2)Busco__ alguien que me ayude a organizar la mía. 3)Necesito __ un grupo musical que sea bueno. 4) Lo siento, no
asked by Tina 
Science  Check my answers
1. Which of the following statements best defines tides? when waves get bigger because of an approaching storm the rise and fall of ocean water that occurs about every 12.5 hours **** the rise of ocean water that occurs 12 times a day a giant wave that can
asked by Helena 
Probability
The random variable X is uniformly distributed over the interval [θ,2θ]. The parameter θ is unknown and is modeled as the value of a continuous random variable Θ, uniformly distributed between zero and one. Given an observation x of X, find the
asked by A 
chemistry
Based upon the intermolecular forces present, rank the following substances according to the expected boiling point for the substance: MgF2, H2O, HCl, N2
asked by sara 
Chemistry
(NH4)2S is a strong electrolyte. Determine the concentration of each of the individual ions in a 0.200 M (NH4)2S solution. [NH4] = M [S] = M
asked by Natalie 
Calculus1
The strength, S, of a rectangular wooden beam is proportional to its width times the square of its depth. Find the dimensions of the strongest beam that can be cut from a 12 inch diameter cylindrical log.
asked by ACDub 
Probability
We have k coins. The probability of Heads is the same for each coin and is the realized value q of a random variable Q that is uniformly distributed on [0,1]. We assume that conditioned on Q=q, all coin tosses are independent. Let Ti be the number of
asked by A 
Probability
Let X=U+W with E[U]=m, var(U)=v, E[W]=0, and var(W)=h. Assume that U and W are independent. The LLMS estimator of U based on X is of the form U^=a+bX. Find a and b. Express your answers in terms of m, v, and h using standard notation. a= unanswered b=
asked by A 
math 7
grade 7 students were surveyed to determine how many hours per day they spent on various activities. The results are shown in the circle graph below. about how many hours per day altogether were spent on watching TV and homework?
asked by dakota 
Probability
Let N be a geometric r.v. with mean 1/p; let A1,A2,… be a sequence of i.i.d. random variables, all independent of N, with mean 1 and variance 1; let B1,B2,… be another sequence of i.i.d. random variable, all independent of N and of A1,A2,…, also with
asked by A 
physics (clear answer)
Two children hang by their hands from the same tree branch. The branch is straight, and grows out from the tree trunk at an angle of 26.1° above the horizontal. One child, with a mass of 43.6 kg, is hanging 1.31 m along the branch from the tree trunk. The
asked by jason 
chemistry
Sodium metal adopts a bodycentered cubic structure with a density of 0.97g/cm3. A. Use this information and Avogadro's number to estimate the atomic radius of sodium. B. If it didn't react so vigorously, sodium could float on water. Use the answer from
asked by Anonymous 
chemistry
Sodium metal adopts a bodycentered cubic structure with a density of 0.97g/cm3. A. Use this information and Avogadro's number to estimate the atomic radius of sodium. B. If it didn't react so vigorously, sodium could float on water. Use the answer from
asked by Liz 
Physics
Alice is going on a picnic and is aware that it will be easier to carry the picnic basket if it balances at the center where the handle is attached. She has placed a 1.55kg container of potato salad at one end and a 0.675kg package of hot dogs at the
asked by Germane 
Statistic ASAP Please
Some people believe in the force (yes, like in Star Wars). To test if young Anakin Skywalker has the force with him, he is told that some cards that Yoda can see but Anakin cannot contain a picture of a planet, a lightsaber, a laser rifle, or a spaceship.
asked by helen 
physics
. A sonar signal is sent from a ship and the signal returns from the bottom 3.65 s later. How deep is the ocean if the speed of sound in water is 1,530 m/s?
asked by Benji 
Science
To solve the problem of a polluted stream a scientist traced where the pollution came from. She determined that the pollution was coming from many small sources. She worked on a plan to help reduce the pollution to the stream. This is an example of
asked by Anonymous 
math
6/16 of children have freckles. of those 1/12 have red hair. how many have red hair and freckles?
asked by sky 
English II B
Deana created a computerassisted slide show. To make the slide show legible, what is one thing she needs to avoid? A)typing bullets in a small font B)adding color and effects to the font C)printing handouts on paper D)adding tables and graphics
asked by Mike 
Physics
A turntable rotates counterclockwise at 63 rpm. A speck of dust on the turntable is at θ = 0.57 rad at t = 0 s. What is the angle of the speck at t = 9.5 s? Your answer should be between 0 and 2π rad.
asked by Jack 
Algebra
If an object is dropped from a height of 144 ft, the function h(t) = –16t² + 144 gives the height of the object after t seconds. When will the object hit the ground? • 1.5 s • 3 s • 6 s • 9 s
asked by Sandra 
science
To solve the problem of a polluted stream a scientist traced where the pollution came from. She determined that the pollution was coming from many small sources. She worked on a plan to help reduce the pollution to the stream. This is an example of
asked by Anonymous 
social studies(updated answers)
1.B 2.C 3.A 4.B 5.D 1.“Along the southern coast of Brazil the central plateau descends in high, steep escarpments. It towers over the waves and moves back in ridges, leveling off from the peaks of the coastal ranges … As it continues along to the
asked by matt 
Physics Help
A graph of wavelength vs. 1/frequency should be a straight line. What are it's slope and yintercept? I'm not given any graphs or numbers, just this question. And I know that Velocity = frequency x wavelength And that slope is found by rise/run and m=
asked by Eiban 
science
What causes midocean ridges to form?
asked by victoria 
social studies check answers
Im not sure these are right.I Tryed my best :D. 1.A 2.B 3.C 4.A or B 5.B 1.“Along the southern coast of Brazil the central plateau descends in high, steep escarpments. It towers over the waves and moves back in ridges, leveling off from the peaks of the
asked by matt 
physics
A jogger with a mass of 66.0 kg reaches the top of a staircase in 44.0 s. If the distance from the bottom to the top of the staircase is 14.0 m, how much power will the jogger create in climbing the stairs?
asked by eli 
English II B
A student has completed a freewriting exercise. The result is a paragraph exploring the general theme of war in a literary text. What is the next step in the writing process? 1.gathering details 2.beginning an outline 3.writing an introduction 4.narrowing
asked by Carl 
Math 2
Use the diagram to find the surface area of a triangular prism. Find the area of the two triangular faces. Then find the area of each of the three rectangular faces. What is the surface area? Describe how you solved the problem. Prism has numbers of 4, 3,
asked by Jenny 2 
chemistry
the lattice energy for MgCl2 is 2326 kj/mol, which is much higher than that for NaCl which has a lattice energy of 786 kj/mol. Why is this so? Give at least two contributing factors.
asked by Mai 
Math
A prototype rocket burns 159 gallons of liquid hydrogen fuel each sound during a regular launch. Make a table that shows how many gallons of fuel are burned after 2,3,5, and 10 seconds.
asked by Anonymous 
physics
A dike in Holland springs a leak through a hole of area 0.60cm 2 cm^2 at a depth of 1.4m m below the water surface. How much force must a boy apply to the hole with his thumb to stop the leak? Express your answer to two significant figures and include the
asked by Phil 
English II B
What is the term for a magazine that is published on the computer? 1. computerized slide show 2. online publication 3. electronic portfolio 4. electronic bulletin board
asked by Carl 
social studies 9
explain why the mohawks and the other first nations would choose to become allies with europeans, even though they knew that all the europeans were a threat to their territory and way of life
asked by kim 
Grammar
Fill in the blanks with the chosen words. words: after and till because as but for if when since so though unless until while or 1) The children went home. It was getting dark. 2) The boys were allowed to read books. The teacher was absent. 3) Mother told
asked by Mohamed 
English II B
Need Help Please. A student is thinking about different forums for publishing an editorial. Which of the following would be appropriate? 1.a dramatic reading 2.an anthology 3.a poetry contest 4.a school newspaper
asked by Carl 
science(check answers)
60 kg cheetah reaches a speed of 30 m/s when chasing its prey
asked by chris 
Maths
Jim has grades of 84, 65, and 76 on three math tests. What grade must he obtain on the next test to have an average of exactly 80 for the four tests?
asked by Jackie 
Health
Which would produce a greater number of Calories a pound of lean meat or a pound of butter? Why is it so?
asked by Bob 
physics
Calculate the water pressure at the base of the Hoover Dam. The depth of water behind the dam is 220m m . Express your answer to two significant figures and include the appropriate units
asked by Anonymous 
physics (clear answer)
MultipleConcept Example 10 provides one model for solving this type of problem. Two wheels have the same mass and radius of 5.0 kg and 0.47 m, respectively. One has (a) the shape of a hoop and the other (b) the shape of a solid disk. The wheels start from
asked by jason 
Physics
A baby whale gets lost from his mother while swimming through a large underwater canyon. Frantically the baby whale yells for his mommy. 1.5 seconds later, the whale hears his yell's ECHO from the canyon wall. How far is it to the canyon wall? The speed of
asked by Help please 
percentages/word problem
The Quick Plumbing Supply sells a set of faucets for $79.75. If a 45% markup based on cost was used, what was the cost of the faucets to Quick Plumbing? (Round to the nearest cent.)
asked by Anthony 
percentages/word problem
A refrigerator costs a company $1,600 to manufacture. If it sells for $3,456, what is the percent markup based on cost? (Round to the nearest whole percent.)
asked by Anthony 
Math
find the 76th term for these numbers 2, 2, 6, 10, 14
asked by Stacia 
geometry
a circle of radius 1 is inscribed in a square. A smaller circle is tangent to two sides of the square and the first circle. Determine the circumradius and inradius of the smaller circle
asked by praddy 
PHYSICS
A rock is thrown vertically upward with a speed of 14.0m/s from the roof of a building that is 70.0m above the ground. Assume free fall. In how many seconds after being thrown does the rock strike the ground? What is the speed of the rock just before it
asked by Anonymous 
math
Alice has 1/5 as many cars as Sylvester has. Sylvester has 35 cars. How many cars does Alice have? My answer is 7 cars
asked by ezekiel 
science
1. What causes midocean ridges to form ? 2. Why are barrier islands important to people who live on the mainland ?
asked by victoria 
English
What is the purpose of a responsetoliterature essay? A) to entertain B) to persuade C) to analyze D) to compare and contrast
asked by Mike 
geometry maths
a circle of radius 1 is inscribed in a square. A smaller circle is tangent to two sides of the square and the first circle. Determine the radius of smaller circle and larger circle
asked by praddy 
science
A 2.1kg brick is placed gently upon a 2.9kg cart originally moving with a speed of 26 cm/s. Determine the postcollision speed of the combination of brick and cart.
asked by bizzle 
Physics
A uniform beam of length L = 8.00 m and weight 3.80 102 N is carried by two workers, Sam and Joe, as shown in the figure below. Determine the force that each person exerts on the beam.
asked by Joe 
physics (clear answer)
The wheels, axle, and handles of a wheelbarrow weigh W = 56.2 N. The load chamber and its contents weigh WL = 584 N. The drawing shows these two forces in two different wheelbarrow designs. To support the wheelbarrow in equilibrium, the man's hands apply a
asked by jason 
Social studies
How did the colonists attempt to work together between 1754 in 1776 show changes of the relationship with Britain
asked by Chance 
percentages/word problem
The Sweet Candy Shop buys 600 pounds of chocolate covered strawberries at $5.59 per pound. If a 10% spoilage rate is anticipated, at what price per pound should the strawberries be sold in order to achieve a 60% markup based on cost?
asked by Anthony 
science
How can water cause both mechanical and chemical weathering?
asked by victoria 
physics
A particular person’s lower leg is 59 cm long and has a mass of 8.0 kg. If allowed to swing freely, with what time period would the leg swing? (Treat the leg as a simple pendulum with length equal to half the leg length and all the leg’s mass
asked by Anonymous 
Physics
The blades of a motor rotate at a rate of 4401 rpm. When the motor is turned off, the blades slow to a new angular speed of 430 rpm in 4.93 seconds. What is the angular acceleration of the blades (in rads/sec^2)?
asked by Emily 
math
a rectangular painting including the frame is 28 inches wide and 24 inches tall.the opening inside the frame is 24 inches wide and 20 inches tall.what is the area covered by the frame
asked by Anonymous 
percentages/word problem
Beacon Electronics advertised a portable TV set on sale for $272.49 after a 35% markdown from the original price. What was the original price of the TV set? (Round to the nearest cent.
asked by Anthony 
Chemistry
Doing some homework, are my answers right? HCN= Polar HCOOH= Polar H2CCCH2= Nonpolar Out of the following elements: Na, H, and Au order them least to greatest in the following: Eletronegativity= Na is smallest, H is second, Au is largest Ionization Energy=
asked by Matthew 
Physics 141
The drawing shows a person (weight W = 586 N, L1 = 0.837 m, L2 = 0.397 m) doing pushups. Find the normal force exerted by the floor on each hand and each foot, assuming that the person holds this position. force on each hand N force on each foot N
asked by dakota22 
English
What is the best strategy for organizing an essay to describe events in time sequence? A)comparison and contrast B)order of importance C)chronological D)spatial
asked by Mike 
Pre calculus
P=(2,2) Q=(3,4) S=(2,8) PS3PQ Find the component form and magnitude of the vector.
asked by Luis 
Physics
A wheel 31.7 cm in diameter accelerates uniformly from 238 rpm to 347 rpm in 5.9 seconds. How far will a point on the rim of the wheel have travelled in this time?
asked by Emily 
physics
A crate with a mass of 80 kg glides through a space station with a speed of 2.5 m/s. An astronaut speeds it up by pushing on it from behind with a force of 210 N, continually pushing with this force through a distance of 8 m. The astronaut moves around to
asked by Anonymous 
Chemistry
A 26.0 g sample of ice at 17.0°C is mixed with 124.0 g of water at 81.0°C. What is the equilibrium temperature?ºC.
asked by Eliza 
science
Imagine that you are the scientist who discovered cells. If you were to give a speech to a group of fellow scientists, what key points would you include that describe your accomplishments?
asked by pj tilly 
math
Scott invests $1,500, at 12% interest, compounded quarterly for 8 years. Use Table 111 to calculate the compound amount for his investment
asked by tota 
physical science
If You Were Riding A Train List Some Examples Of Items That Would Make It Seem Like You Weren't Moving
asked by steve 
physics
Does changing the angle of an incline that you are rolling a ball down change any of these paramaters? Final velocity of the ball, work, initial potential energy, and final kinetic energy?
asked by mika 
science
An ideal gas for which Cv = 3R/2 is the working substance of a Carnot engine. During the isothermal expansion, the volume doubles. The ratio of the final volume to the initial volume in the adiabatic expansion is 5.7. The work output of the engine is 9 x
asked by juniah 
English
What is the purpose of prewriting in the writing process? A) to help polish your writing B) to find details to complete paragraphs C) to organize your thoughts within a draft D) to help develop a topic for writing
asked by Mike 
Spanish
This is online homework that I have done but I am having trouble with 3, 5, 6, 7, and 8. For 3 i put l, for 5 d, for 6 b and for 8 i. But they were in correct. 1) (blank) esta todo bien y esperamos que 2) (blank) tambien lo este. 3) (blank) lo pensemos y
asked by Tina 
physics
In the sketch, the small hydraulic piston has a diameter of 2.5cm cm . The large piston has a diameter of 6.4cm cm . For each newton of force applied to the small piston, how many newtons of force are exerted by the large piston? Express your answer using
asked by Phil 
science
discuss how the structure of a virus correlates with its function
asked by schoolboy 
math
Brianna invests $3,500, at 12% interest, compounded quarterly for 1 year. Manually calculate the compound interest for this investment.
asked by tota 
physics
How you find the oscillation period of a mass if not given the mass, or spring constant? A mass is attached to a vertical spring, which then goes into oscillation. At the high point of the oscillation, the spring is in the original unstretched equilibrium
asked by Win 
Physics!!
A subatomic particle has a 410ns lifetime in its own rest frame. If it moves through the lab at 0.970 c, how far does it travel before decaying, as measured in the lab?
asked by Amy 
physics
How you find the oscillation period of a mass if not given the mass, or spring constant? A mass is attached to a vertical spring, which then goes into oscillation. At the high point of the oscillation, the spring is in the original unstretched equilibrium
asked by Win 
Pre Algebra
The low temperature for 6 consecutive days in a Montana city were 9°,3°,4°,16°,11°,and 5°. What would the low temperature have to be on the seventh day to have a mean low temperature of 6°for the week?
asked by Angel 
Physics
What is the energy of a single photon with a frequency of 7 x 10^8 Hz. (hint Planck's constant = 6.626 x 10^34) To type an answer in scientific notation, use 'e'. For example, Planck's constant would be typed in as 6.626e34.
asked by Anonymous 
pyhsics
The top floor of a building is 40m m above the basement. Calculate how much greater the water pressure is in the basement than on the top floor. Express your answer to two significant figures and include the appropriate units.
asked by Phil 
physics
Calculate the water pressure at the bottom of the 50m {\rm m}high water tower shown in the photo. Express your answer to two significant figures and include the appropriate units
asked by Anonymous 
Math
Explain how to write a function rule from the table below. Then write a function rule. x 2 4 6 y 1 0 1
asked by Anonymous 
chemistry
A certain acetic acid solution has pH = 2.14. Calculate the volume of 0.0900 M KOH required to reach the equivalence point in the titration of 35.0 mL of the acetic acid solution.
asked by Tessa 
physics
The top floor of a building is 40m m above the basement. Calculate how much greater the water pressure is in the basement than on the top floor. Express your answer to two significant figures and include the appropriate units.
asked by Phil 
Chem
10.0 grams of barium chloride (208.3g/mol) is reacted with excess potassium phosphate and 7.22 of grams of barium phosphate (601.8 g/mol) is isolated. calculate the theoretical yield of barium phosphate
asked by Anonymous 
percentages/word problem
The Soft Step Floor Company purchases carpeting for $5.12 per square yard and marks it up 55% based on the selling price. What is the selling price per square yard? (Round to the nearest cent.)
asked by Anthony 
Physics!!!
How much work W must be done on a particle with a mass of m to accelerate it from rest to a speed of 0.899c ? Express your answer as a multiple of mc^2 to three significant figures.
asked by Amy 
chemistry
calculate the pH of the solution when 100mL of .05M KF is mixed with 200mL of .05M HF; Ka (HF) = 3.467x10^4. I tried to use the Henderson Hasselbach equation to get the correct answer (pH=3.16) but can't seem to get it correct. Any help would be AMAZING!
asked by Jamie 
statistics
à manufacturer of computers designed to aid social scientists in analyzing research data clams that his computers are opérational for at least 80 percent of the time. during the course of the year one computer was operational for 270 days. test, 1
asked by Ronaldo 
science
PLEASE HELP GUYS An ideal gas for which Cv = 3R/2 is the working substance of a Carnot engine. During the isothermal expansion, the volume doubles. The ratio of the final volume to the initial volume in the adiabatic expansion is 5.7. The work output of
asked by juniah 
social studies
1. which action was NOT an example of telling against society in the 1920s in the united states? a. going to speakeasies b. dancing the Charleston c. women bobbing their hair d. women working outside the home 2. what is the main reason businesses made
asked by what 
science
The coils in a toaster convert electrical energy into thermal energy. Heat from the coils is used to toast the bread. How is the heat from the coils transferred to the bread?
asked by victoria 
College advance english
how do varieties of informative and positive messages adapt the basic pattern?
asked by Maci 
percentages/word problem
A wholesaler buys plastic lamps for $18 each and sells them for $30.60. What is the percent markup based on cost?
asked by Anthony 
Physics
A 4.8 kg container of water sits on a scale A. A cube of aluminum with sides of length 11.0 cm is suspended from a spring scale B so that half of the block is submerged in the water. What is the reading (in N) on spring scale B The continual question is
asked by Jason 
Physics
A spherical hydrogenfilled balloon is used to lift a load of 5950 N (in addition to the weight of the hydrogen). Suppose the density of the air is 1.18 kg/m3. Find the minimum necessary radius for the balloon
asked by Jason 
Geometry
what's the surface area of a right trapezoidal prism
asked by Anonymous 
business Math
Abe Wolf bought a new kitchen set at Sears. Abe paid off the loan after 60 days with an interest charge of $9. If Sears charges 10% interest. What did Abe pay for the kitchen set? (Use 360 days a year. Do not round intermediate calculations.)
asked by marie 
math
If a tshirt goes on sale for 25% off, how much is the discount on a Tshirt that originally costs $36.00?
asked by Anonymous 
Probability
Caleb builds a particle detector and uses it to measure radiation from a remote star. On any given day, the number of particles, Y, that hit the detector is distributed according to a Poisson distribution with parameter x. The parameter x is unknown and is
asked by A 
PHYSICS!!!
A boat moves at 7.00m/s relative to the water. (You can neglect relativity at these slow speeds.) The boat travels 100 m downstream and then 100 m upstream, returning to its original point. Find the time for the round trip
asked by Amy 
Math
The great white shark can grow can to a length of 4.9m. The mako shark can grow to a length of 40 dm. Which shark can grow to the greater length?
asked by Anonymous 
Science
Physical properties used to indicate temperature changes include all of the following except a. color changes of liquid crystals b. volume changes of fluids and solids c. changes in electrical resistance d. odor changes in solids
asked by Red 
physics.
Rank the following from most to least for the percentage of its volume above the water line: A. Basketball floating in saltwater B. Basketball floating in glycerin C. Basketball floating in gasoline
asked by Anonymous 
percentages/word problem
Carousel Toys has Romper Buckaroos, wooden rocking horses for toddlers, on a 30% markdown sale for $72.09. What was the original price before they were marked down?
asked by Anthony 
optimization
Farmer taylor wants to fence a rectangular area of 1800 square feet and divided into 3 parts by fencing parallel to the shorter side. What is the minimum amount of fencing for this job?
asked by JESSICA 
Works Cited alphabetize
I know that Works Cited pages go in alphabetical order according to the author's last name. How do you decide which work goes first when you have two works by two authors that have the same last name?
asked by Shylock 
geometry
You are given a sheet of paper with the following diagram on it. You are also told that the two circles have the same radii and you are given a straight edge. Draw an isosceles triangle. N.B. you do not know where the centre of either circle is, you do not
asked by lasarith 
math
sue spends 2 1/4 hours taking inventory and 1 1/2 hour restocking. how many hours did she work
asked by Anonymous 
Physics 141
The drawing shows a bicycle wheel resting against a small step whose height is h = 0.125 m. The weight and radius of the wheel are W = 23.1 N and r = 0.330 m, respectively. A horizontal force vector F is applied to the axle of the wheel. As the magnitude
asked by dakota22 
science
1. Why is the periodic table usually drawn with hydrogen (H) separated from the rest of the elements?
asked by victoria 
English
List as many details as you can for each of the topic sentences. 1. Walking briskly for a mile after a day sitting at a desk helps dispel fatigue. Purpose: To explain 2.Bird watching in the woods is relaxing as well as educational Purpose: To convince
asked by anon 
math
1.06(0.8n)represents the total paid for a jacket. What does this represent about the cost of the jacket?
asked by zena 
science
1. Describe 2 ways in which an electrically charged object and magnet are alike.
asked by victoria 
physics
Calculate the average force per nail when Sarah (following figure), who weighs 130 pounds, lies on a bed of nails and is supported by 600 nails. (Figure 1) Express your answer using two significant figures.
asked by Phil 
Biographical Essay Evaluation (Writeacher)
Write a 3paragraph Biographicl Essay. Discuss your experiences with summer: the things you enjoyed and the things you missed about school. What I have written: "A strong sense of freedom is one of my favorite things about summer. Setting in only once the
asked by Anonymous 
percentages/word problem
18) In October, a hardware store purchased snow shovels for $8 each. The original markup was 50% based on the selling price. In December, the store had a sale and marked down the shovels by 20%. By January 1, the sale was over and the shovels were marked
asked by Anthony 
finance
A bond that has a $1000 par value (face value) and a contract or coupon interest rate of 11.1%. The bonds have a current market value of $1125 and will mature in 10 years. The firms marginal tax rate is 34%. The cost of capital from this bond debt is what
asked by jon 
social studies
What would the highest and lowest points look like on a topographic map?
asked by Anonymous 
college chemistry
What would the [H3O+] be after addition of 5.15 mL of 0.1000 M HCl to 25.00 mL of 0.1000 B (a weak base, Kb = 6.31e5)?
asked by hershi 
Social Studies (History)
What did Germany, Italy, Japan, and the Soviet Union aka USSR have in common before WWII? please have four reasons and please explain why these countries had that similarity.
asked by jeffery 
Chem
How do you predict when a reaction goes nonspontaneous if you have delta h Stotal and deltaS
asked by Michelle D. 
englishpoetry
how can i revise this haiku poem? lunch bell rings change clinking in our pockets striving for food
asked by anonymous 
chemistry
what is z effective? Rb+ Al3+ Mg2+ Na+ out of this set which ion is the smallest? which is the largest?
asked by Mai 
physical science
why it is necessary to apply sunscreen to your skin and wear sunglasses when you want sunbathe on the beach?
asked by comfort mohlola 
maths
compare and contrast the alpha error and the beta error. how can the two be corrected in the same research?
asked by Romoz 
Maths please someone help me out!!!
3. The efficiency of an industrial pump decreases by a fixed percentage each year. The percentage decrease each year is with respect to the efficiency of the pump at the start of each year. Over each four year period, the efficiency decreases by 80%. Let
asked by Jasmine 
Physic
Why is the potential difference between the terminals of a battery is not always equal to the e m f of a battery
asked by Kenah 
Math
John spoke to his friend from 10:15am11:00am. And then John spoke to that same friend again from 12:30pm1:15pm. altogether, how many minutes did John speak to his friend? How do I figure this out?
asked by Max 
science
Finely ground sane can be poured like water. Why is sand considered a solid rather than a liquid? How is sand different than liquids?
asked by victoria 
Math
Solve by factoring: 4x^2+12x+9=0
asked by Anonymous 
Algebra 2
Please help me solve and find the excluded values for this problem. Also please show me the work for this problem I want to learn!F(h) = x^29/x^24x+3
asked by Omar 
mathurgent
1. two cards are drawn from a standard of 52 cards. Find the probability that the second card is a spade given that the first card is a club. 2. Suppose you draw 3 cards from a standard deck of 52 cards . Find the probability that the third card is a club
asked by temmick 
chemistry
what is the oxidation halfreaction in the following chemical reaction? fe(s) + 3 agno3 > ag + fe(no3)3
asked by Anonymous 
science
1. Why is the periodic table usually drawn with hydrogen (H) separated from the rest of the elements? 2. Finely ground sane can be poured like water. Why is sand considered a solid rather than a liquid? How is sand different than liquids?
asked by victoria 
Calculus
Determine whether the series is convergent or divergent. If it is convergent, find its sum. If it is divergent, enter NONE. sum from 1 to infinity of 1/e^2n. It is convergent, but I do not know how to solve for the sum.
asked by Sandy 
Calculus
Determine whether the series is convergent or divergent. If it is convergent, find its sum. If it is divergent, enter NONE. sum from 1 to infinity of (5^n+4^n)/20^n It is convergent, but I do not know how to find the sum.
asked by Sandy 
science
The type of heat transfer called convection happens as a result of: a. electromagnetic waves b. the direct contact of particles in a substance c. the actual motion of a fluid in the form of currents d. All of the above I think it's C.
asked by Red 
physics
Find its density. Express your answer to two significant figures and include the appropriate units How does this compare with the density of water? Express your answer using two significant figures.
asked by Phil 
science
2. Why is it important to protect yourself from certain electromagnetic waves? What are some ways people protect themselves from these waves ?
asked by victoria 
science
How does Newton's first law of motion explain the movement of your body when in a car in which you are riding stops suddenly?
asked by victoria 
science
A researcher determined the amount of electrical energy entering a toaster and the amount of heat given off by the toaster. The amount of heat was less than the amount of electrical energy. How can this observation be explained?
asked by victoria 
science
What happens when light passes from one material to another?
asked by victoria 
science
Suppose you were asked to select one renewable energy resource for use in your town. Which would you select, and why?
asked by victoria 
science
How does Newton's first law of motion explain the movement of your body when in a car in which you are riding stops suddenly?
asked by victoria 
Physics
A particular garden hose has an inside diameter of 15/16 in. The nozzle opening has a diameter of 5/16 in. When the flow speed of the water in the hose is 0.58 m/s, what is the flow speed through the nozzle?
asked by Jason 
CAN ANYONE HELP?
I posted my science (chemistry) question and I have received no help and i really need to get this done so can someone please help??
asked by Anonymous 
chemistry
How many different NO bond lengths would you expect to observe in the actual structure of NO3− and why?
asked by Mai 
world history
Distinguishing unique patterns of biodiversity in eastern and western areas of Southeast Asia, the Wallace Line is found between
asked by Anonymous 
PHYSICS!!
Light travels at about 0.75c in water. A)What's the wavelength in water of light whose wavelength in vacuum is 418nm
asked by Amy 
Algebra
1. Find the quotient: e^2e12/e4 A. e+3/e4 b. e^2+3 C. e3 D. e+3 2. Find the quotient: (a^2+11a+30) / (a + 5) A. a+6 B. a^2 + 10a+25 C. a^2 + 11a + 25 D. a+6/a+5 3. Find the LCM for x^2+3x+2 and x^2 +5x+6. A. (x+1)(x+2)(x+3) B. x+1 C. x+3 D. (x+1)(x+3)
asked by ciara 
math
If a 6sided number cube is rolled twice, what is the probability that a 1 is rolled both times?
asked by Anonymous 
math
If a sandwich shop sells lunches that include one sandwich and one side dish, draw a tree diagram to represent the number of combinations that are possible if the choices are a ham or turkey sandwich and chips or cookies as the side dish.
asked by Anonymous 
Maths
4. Calculate average speed of particle which position at time t is given by the function g(t) = t3, on the intervals (a) [2,3]; (b) [2,2.1]; (c) [2,2.0001]; (d) [2, 2 + h] , where h > 0 is arbitrary positive number. Find g′(2).
asked by Jasmine 
math  6th grade
HELP! How do I solve for x: 4x+2=3x+9
asked by Skylar 
Algebra
Simplify (X^3)^4(2x^2)^3
asked by Anonymous 
PRE CALC
Evaluate: sigma notation of (3cos k(pi) +1) start value: k=0 end value: k=3
asked by Aly 
physical science
what is the importance of ozone in the stratosphere for your health?what will happen to us when ozone depletion becomes more serious?
asked by comfort mohlola 
Algebra
4/b+1 + 1/b24 + 5/b+2
asked by Anonymous 
maths
what is the total of £3.89 x 589
asked by howard 
Math
How many years would it take a worker making $40 per hour to earn $8,000,000, assuming she works 240 8hour days per year?
asked by Anonymous 
Employee Training and Development
The major difference between internetbased training and intranet based training is:
asked by Anonymous 
math
what is a leading interval of 5 does it mean 4 or 6
asked by URGENTTTTT 
Biology
Which is the highest? Ecosystem population community
asked by Anonymous 
Math  Int Trig
Given the functions: f(x)=2x+2 g(x)=3/x^2+2 h(x)=sqrt(x2) Find the following 1) (f∘g)(5) 2) (h∘g)(3) 3) (g∘h)(2) 4) (g∘g)(2) 5) (f∘h)(12) Find the following and state the domain: 6) h∘g 7) f∘g 8) g∘f 9) g∘g 10)g∘h
asked by Lilly 
Resources for educating young children
A portfolio should?
asked by Rosa 
Very tough maths
The number of ways there are to arrange 6 distinct rooks on a 10x10 board such that none of them can attack each other is n. Find the product of the nonzero digits of n.
asked by NirjhorTheGenius 
GAMMAR
State the "Tenses" : 1) If it rains like this for a few more hours, the roads will all be waterlogged. 2) He will have finished reading the book by evening. 3) what was he doing when she came?
asked by NIYA 
Calculus1
derivative of h(x)= 3(√x)  x(√x)
asked by ACDub 
algebra
solve the equation 3/ (x+1)  1/x =1/2
asked by anna 
Pre calculus
Find a unit vector in the direction of the given vector. v=(1,1)
asked by Luis 
Precalculus
Find a unit vector in the direction of the given vector. w=12j
asked by Luis 
Math  Algebra2
Given the functions: f(x)=3x+2 g(x)=3/x^2+2 h(x)=sqrt(x2) Find the following a) (f∘g)(5) b) (h∘g)(3) c) (g∘g)(2) d) (f∘h)(12) Thanks
asked by Lilly 
poetry
is this a good poem about the hunger games ? 24 tributes from 12 districts 2 kids from each forced to fight to death Only one comes out alive With 23 others dead 24 tributes in total 12 districts in all As punishment for the rebellion Against district 13
asked by anoymous 
Physics
Consider the following distribution of objects: a 4.00kg object with its center of gravity at (0, 0) m, a 1.20kg object at (0, 3.00) m, and a 5.40kg object at (2.00, 0) m. Where should a fourth object of mass 7.00 kg be placed so that the center of
asked by Joe 
Statistics  Please help
An experiment was conducted to determine the abrasion resistance of a new type of automobile paint. Twelve different strips of metal were painted with the new paint. The abrasion resistance of each piece was then tested on a machine. In the sample, the
asked by Bre 
science
Why is the periodic table usually drawn with hydrogen (H) separated from the rest of the elements?
asked by victoria 
English
In what ways have social media made our lives easier?
asked by Lwazi 
High school math
What is 2 plus 2
asked by Miley cyrus 
Biology
What are the three types of dispersion?
asked by Anonymous 
algebra
Determine the value of each expression 25% of 200
asked by Becca 
science
Suppose you were designing a statue to be placed outside your school. What materials would you use, and why?
asked by victoria 
Phyiscs
A hollow copper tube (diameter = 4.01 cm) is sealed at one end and loaded with lead shot to give a total mass of 0.218 kg. When the tube is floated in pure water, what is the depth, z, of its bottom end?
asked by Jason 
Geometry
what's the formula for the base area of a right triangular prism
asked by Anonymous 
Calculus
Given f(x)=−2x^3 3x + 1, the value of the derivative of the inverse function, f^−1(x) at x=−21 is (f^1)′(−21)= ? please explain how to solve this
asked by Ann 
operating system
ertertertert
asked by Anonymous 
french
what's wrong with this sentences? 1. Je m'amuse lire quand je m'ennuie. 2. Partie de sa routine quotidienne comprend à se regarder dans le miroir pour se raser avec un rasoir et de la crème à raser. 3. J’ai besoin habituellement de me dépêcher le
asked by Anonymous 
Math
find the 93rd term for the following pattern. 3, 6, 9, 12,15 these are equations
asked by Stacia 
English
1. Because it was so late, we went home. 2. Because of its lateness, we went home. (Is #2 grammatical?)
asked by rfvv 
Math 3
Zach needs to paint all the sides and the tops of these steps, but not the bottom. How many square feet does he need to paint? Explain how you solved dimensions 2,2,4 and 2,2,2. Thanks
asked by Jenny 2 
mathematics
Find x when (x^3 ?2(x^2)?5x+6) is divided by (x1)
asked by sunkanmi 
math
How many miles does a person travel if she drives a car at 50 miles per hour for 3.5 hours?
asked by Anonymous 
mathematics
If ?2 is the solution of the equation 2x+1? 3c=2c+3x?7 find the value of c
asked by sunkanmi 
mathematics
Intergrate sin3x dx
asked by sunkanmi 
mathematics
Find the maxizimum value of y in the eaquation y=1?2x?3(x^2)
asked by sunkanmi 
mathematics
3(^2)+6x?2=0 solve the equation
asked by sunkanmi 
maths
If Asquare+Bsquare=16 and 2AB=7. Find the possible values of (AB)
asked by ogboyeb 
Maths
4. Calculate average speed of particle which position at time t is given by the function g(t) = t3, on the intervals (a) [2,3]; (b) [2,2.1]; (c) [2,2.0001]; (d) [2, 2 + h] , where h > 0 is arbitrary positive number. Find g′(2).
asked by Jasmine 
Science
fill in the blank questions monotremes, marsupials, and placentals have the same _____ known as the therapsid. a farmer sprays insecticide on his crops and notices that the insect pest problems disappear. a year later he tries the same insecticide only to
asked by Anon