Questions Asked on
March 10, 2013

Math
A cylinder shaped can needs to be constructed to hold 400 cubic centimeters of soup. The material for the sides of the can costs 0.03 cents per square centimeter. The material for the top and bottom of the can need to be thicker, and costs 0.06 cents per
asked by jonh 
Spanish please help!
Complete each sentence with the correct form of the verb in parentheses. 1. La clase de matemáticas (terminar) a las cuatro. 2. ¿Te gusta (estudiar) psicología? 3. La profesora (explicar) el mapa. 4. Necesito (comprar) el libro de español. 5. Ustedes
asked by kim 
Physics
A plate carries a charge of 3.2 µC, while a rod carries a charge of +1.5 µC. How many electrons must be transferred from the plate to the rod, so that both objects have the same charge?
asked by Anonymous 
Chemistry
Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH, and the concentrations of all species in a 0.300 M phosphoric acid solution. kPa1: 2.16 kPa2: 7.21 kPa3:12.32 [H3PO4] = ?
asked by Paula 
Stats
A roulett wheel has 38 slots in which a ball can land two of e slots are green, 18 are red, 18 are black. The ball is equally likely to land in any slot, and each spin of the wheel is assumed to be independent. A)if the wheel is spun twice what is the
asked by Salina 
Statistics
A private opinion poll is conducted for a politician favors decriminalizing marijuana possession. How large a sample is needed in order to be 95% confident that the sample proportion will not differ from the true proportion by more than 2%.
asked by Clifford 
chemistry
Plastic articles can be chromiumplated by coating them with thin layer of graphite paste,placing them in a bath of aqueous chromium(III) sulphate and electroplating. a)Suggest a reason why the article is first coated with graphite. b)what substance could
asked by harish 
chemistry
What mass of F2 is needed to produce 116 g of PF3 if the reaction has a 77.4% yield?
asked by bill 
Chemistry
Which of the following represent conjugate acidbase pairs? For those pairs that are not conjugates, write the correct conjugate acid or base for each species in the pair. a. HS4,SO4^2 B. HBr, BrO c. H2PO4, PO4^3 d. HNO3, NO2
asked by Juan 
maths
Positive square root of 7+root 48 is ????
asked by tuhituhi 
chemistry
The formula weight of an acid is 82. In a titration, 100cm3 of the solution of this acid containing 39g of this acid per litre were completely neutralized by 95 cm3 of aqueous naoh containing 40g of naoh per litre. What is the basicity of this acid? Bob
asked by Fai 
chemistry
Ethanol, C2H5OH, is being promoted as a clean fuel and is used as an additive in many gasoline mixtures. Calculate the ΔH°rxn for the combustion of ethanol. ΔH°f [C2H5OH(l)] = 277.7 kJ/mol; ΔH°f [CO2(g)] = 393.5 kJ/mol; ΔH°f [H2O(g)] = 241.8
asked by Anonymous 
Physics
A 250N force is applied at an angle of 32 degrees above the horizontal to a 96kg box causing it to slide along a floor. The coefficient of friction between the box and the floor is 0.18. What is the magnitude of the net force on the box? The answer is 67N,
asked by Julia 
chemistry
For the reaction 2A(g) + B(aq) + 3C(l) D(s) + 3E(g), the concentrations at equilibrium are found to be: A: 2.3x10^3 Pa B: 1.8x10^2 M C: 15.8M D: 12.5M E: 5.6x10^4 Torr Find the numerical value of the equilibrium constant that would appear in a
asked by Ashley 
chemistry
7750 Joules of energy is added to a 325 grams stone at 24.0 degrees centigrade. The temperature increases by 75.0 degrees centigrade. What is the specific heat of the stone?
asked by basil 
physics
A wire that is 70 cm long, carrying a current of 6.5 A, is at right angles to a uniform magnetic field. The magnitude of the force acting on the wire is 0.60 N. What is the strength of the magnetic field?
asked by Jeff 
chemistry
Find the concentration of Ag+ in a saturated solution of AgBrO3 that also contains 0.02M LiNO3, 0.02M KClO4 and 0.01M NaF.
asked by Ashley 
Algebra 1
Sarah took the advertising department from her company on a round trip to meet with a potential client. A total of 9 people took the trip. She was able to purchase coach tickets for $380, and first class tickets for $1070. She used her total budget for
asked by Melessa 
chemistry
1L of a buffer composed of acetic acid and sodium acetate has a pH of 4.3. Adding 10mL of 2M sodium hydroxide solution to 100mL of this buffer causes the pH to rise to 4.87. what is the total molarity of the original buffer?
asked by stephanie 
Math
Mark bought four times as many apples as Harry and three times as many apples as Martin. If Mark, Harry, and Martin purchased less than a total of 190 apples, what's the greatest number of apples that mark could have purchased?
asked by Dawn 
physics
A sinusoidal voltage Δv = (65 V) sin (140t) is applied to a series RLC circuit with L = 100 mH, C = 175 μF, and R = 42 Ω. (a) What is the impedance of the circuit?
asked by Anonymous 
algebra URGENT HELP
form a polynomial whose degree and zeros are given. don't expand a) degree 3,zeros,2,0,4 b)degree 4,zeros, 2 multiplicity 3,1 multiplicity 1 solutions a)p(x)= x(x+2)(x4) B)p(x) =(x+2)^3(x1)
asked by zachary 
math
There is a slide in the park that is 18 feet long. The ladder to the top of the slide is 7.5 feet long. If the ladder and the slide are perpendicular, what is "D", the distance from the top of the slide to the ground? Explain how you got your answer.
asked by sara 
Stats
Directions: Suppose you have a standard deck 52 cards (4 suits: hearts, diamonds, clubs, and spades each suit has 13 cards (1/4 of the deck) and those 13 cards include one ace,and numbers 2 through 10 and 3 face cards: a jack a queen and king) suppose you
asked by Sarah 
physics
A rubber band has a"spring constant" of 45 N/m. When the rubber band is pulled by a force of 9.8 N , how far will it stretch and what is potential energy?
asked by ryan 
math
a ball tossed to a height of 4 meters rebounds 40% of its previous height. the total distance travelled by the ball by the time it comes to rest is?
asked by ross 
maths
13a*root 10 whole root = root 8 + root 5 then a equals to ???
asked by tuhituhi 
Physics
An alpha particle (charge +2e and mass 6.64 x1027 kg) is traveling to the right at 1.50 km/s. What uniform electric field (magnitude and direction) is needed to cause it to travel to the left at the same speed after 2.65 s.?
asked by Anonymous 
Physics
An alpha particle (charge +2e and mass 6.64 x1027 kg) is traveling to the right at 1.50 km/s. What uniform electric field (magnitude and direction) is needed to cause it to travel to the left at the same speed after 2.65 s.?
asked by Anonymous 
Chemistry
How will the addition of sodium acetate to an acetic acid solution affect the pH? A. solution becomes hotter B. It will lower the pH C. It will raise the pH D. pH will not change E. pH cannot be measured I selected answer D and got it wrong. I don't
asked by Lisa 
Science
What property of water causes a water droplet to be shaped like a dome? Also can you please explain these words? Surface temperature, surface area and surface tension.
asked by Jessica 
physics
the olympic record for the marathon is 2.00 h 9.00 min 210 s. if the average speed of a runner achieving this record is 5.436 m/s, what is the marathon distance
asked by Anonymous 
Physics
Your grandfather clock’s pendulum has a length of 0.9930 m. If the clock loses 95.6 seconds per day, by how many millimeters should you adjust the length of the pendulum?
asked by Andrew 
Math
The carpet cost $18.95 per square yard. The width is 18ft and the length is 25% longer than the width find the cost of the carpet
asked by Anonymous 
physics
A white billiard ball with mass mw = 1.32 kg is moving directly to the right with a speed of v = 2.91 m/s and collides elastically with a black billiard ball with the same mass mb = 1.32 kg that is initially at rest. The two collide elastically and the
asked by Anonymous 
physics
The position vector r of a particle moving in the xy plane is r=2ti+2sin[(pi/4)t]j , with is in meters and t in seconds. (a) Calculate the x and y components of the particle's position at , and 4.0 s and sketch the particle's path in the plane for the
asked by Anonymous 
ALGEBRA 2
Predict the population of bacteria for each situation and time period. 55 bacteria that double every hour a. after 3 hours b. after 5 hours
asked by SUPER DUPER IMPORTANT! 
statistics
If the average number of textbooks is 16, the standard deviation is 5, and the average age of a professors is 43, with a standard deviation of 8, which data set is more variable?
asked by ann 
Physics
the volume of a monoatomic ideal gas doubles in an adiabatic expansion. by considering 135 moles of gas with an initial pressure of 330kPa and an initial volume of 1.2m^3, the gas is then expands adiabatically to a volume of 2.4m^3. FIND THE WORK DONE BY
asked by PhyConfusion 
English
1. What is he like?  He is strong and tall.  He is active and generous. 2. What does he look like?  He is reserved and friendly.  He is average height. (Are they all grammatical? What is the difference between question 1 and Question 2?)
asked by rfvv 
Chemistry
Water has an extremely high boiling point compared to other compounds of similar molar mass because of ? Hydrogen Bond Adhesive force Covalent bonding Dispersion Forces I believe the answer is A since hydrogen bond is a strong bond and thus require most
asked by Shadow 
physics
how a bleeder resistor (R = 260 k) is used to discharge a capacitor (C = 85.0 µF) after an electronic device is shut off, allowing a person to work on the electronics with less risk of shock. Figure 20.47 (a) What is the time constant? (b) How long will
asked by taryn 
Physics
A girl(60 kg) is sliding in the snow towards a cliff that is only 15 meters away. She is moving 6 m/s. She digs her fingers into the snow to try and save herself. How much force do her fingers need to provide if she is going to successfully stop in time?
asked by Anonymous 
Chemistry
what mass in grams of sodium hydroxide is produced if 20.0g of sodium metal reacts with excess water according ro the chemical equation, Na(s)+H2O4>naoh(aq)+h2(g)
asked by Fatima 
algebra
creat a graph for the function that models the percentage of adulat height attained by a boy who is years old. then creat a graph for the function that models the percentage of adulat height attained by a girl who is years old.
asked by louise 
Algebra
Find the smallest positive integer N such that 13^N \equiv 1 \pmod{2013}.
asked by John 
maths
Two walkers set off at the same time from a crossroad and walk along flat straight roads inclined to each other at 68 degrees.If they both walk at a speed of 6km/h,find their distance apart 10 minutes later.
asked by Shane 
maths
Two walkers set off at the same time from a crossroad and walk along flat straight roads inclined to each other at 68 degrees.If they both walk at a speed of 6km/h,find their distance apart 10 minutes later.
asked by Shane 
Math
How can I find 2 equations with infinitely many solutions? Thanks
asked by Cara 
precalculas
Find the slant asymptote, if any, of the rational function. Do not graph the function. (Enter your answers as a commaseparated list of equations. If an answer does not exist, enter DNE.) f(x) = x2 − 2x + 15 _____________ x + 7
asked by melanie 
Math
For the following demand equation compute the elasticity of demand and determine whether the demand is elastic, unitary, or inelastic at the indicated price. (Round your answer to three decimal places.) x + (1/9)p  27 =0 ; p=23
asked by Tay 
Chem
How many grams of KO2 are needed to produce 370.0 L of O2 at 20.0 degrees Celsius and 1.00 atm? 4KO2(s) +2CO2(g) > 2K2CO3(s)+ 3O2(g)
asked by Anonymous 
Chem
The density of gas containing chlorine and oxygen has density of 2.875 g/l at 756.0 mm Hg and 11 degrees Celsius what is the most likely molecular formula of the gas?
asked by Anonymous 
math
write a polynomial function in standard form with the given zeros. 12i,2
asked by lisa 
math
1 basketball equals 20 ounces. So how many pounds do 8 basketballs weigh? please tell me how you got it!
asked by Adaija 
Math
How can I find 2 equations with infinitely many solutions? Thanks
asked by Cara 
Math
Dr. Jane I came up with this: 127,128,129,139,139,139,141,143,144,145,146,147,148,152 Does this seem to work?
asked by John 
Physics
A car with engine trouble slides 85 meters up along a 14 degree ramp before coming to a stop. If the coefficient of friction between the tires and the road is 0.9, what was the velocity of the car at the bottom of the ramp? I'm not looking for a solution
asked by Ed 
math
8^x+1=3
asked by lisa 
Physics
Buffy the Vampire Slayer is buffing up her 0.53 meter long arms by bench pressing. In 35 seconds she can lift 38 kilograms of mass 23 times. How powerful are Buffy's arms?
asked by Anonymous 
science
could you pl tell me the correct name for a person who sells an animal skin
asked by r s telagathoty 
algebra
i am to consider the line x3y=2 what is the parallel line slope and the perpendicular line slope
asked by mary 
civics
I'm confused about what dual federalism is. I;ve read so many things and I'm still uncertain. My teacher said there are three dualites: duality of authority, nations, and citizenship. I know what the nations and citizenship examples would be but I'm not
asked by Anonymous 
maths
Simplify 32*root2 of whole root ??
asked by tuhituhi 
Math
The equation of the line goes through point (7,8) and is perpendicular to line 4x+5y=4 written in form y=mx+b.... What is m and what is b?
asked by Anonymous 
Life orientation
How 2 deal with Unethical behaviour
asked by Maine refilwe 
english
what's an example of an appostion in the book Miracle Worker?
asked by mike 
Algebra 1
Solve the system by addition. 10x+3y=4 20x6y=8
asked by Melessa 
Education
Hello! I'm working on a lesson plan on the Sum of the Angles of a Polygon. I know the whole process involves finding how many triangles there are (#of sides minus 2) and then multiplying by 180degrees. But my focus on this lesson plan is on 5th grade
asked by yfaridi1 
PHYSICS
At what angle should you launch a projectile from the ground so that it has the greatest time of flight?
asked by plshelp 
Algebra 1
Solve the system by addition 10x+3y=4 20x6y=8
asked by Melessa 
Physics
A 51.8 kg pole vaulter running at 11.5 m/s vaults over the bar. Her speed when she is over the bar is 1.26 m/s. Neglect air resistance, as well as any energy absorbed by the pole, and determine her altitude as she crosses the bar
asked by Anonymous 
ConcavityCalculus
Determine the concavity for f(x)= 4/x^21 I took the second derivative and solved for zeros. I got x=1 and x=1. However when plugged into the orig. equation this results in 4/0 (undefined). Does this mean there is no concavity?
asked by Lisa 
English
write a story with these words
asked by Gerry 
Pre Calclulus
Write the trigonometric expression as an algebraic expression. sin(arcsinx+arccosx)
asked by Anonymous 
math
which expression mean "3 times a number h"? A. 3 x h B. 3  h C. 3 + h D. 3 divided h I am thinking it is A but not sure?
asked by jared 
Physics
A 3.23 kg ball is attached to a ceiling by a 1.31 m long string. The height of the room is 5.75 m What is the gravitational potential energy of the ball relative to a point at the same elevation as the ball?
asked by Anonymous 
slope and graphing
The lines y=5/12x and y=4/3 are drawn in the coordinate plane. Find the slope of the line that bisects these lines. How? Do we find the average? Do we build isosceles triangles?
asked by Knights 
Life oriantation
Identify five practices in the above case study that are in contravention of the basic conditions of employment act.
asked by Syabonga 
Life oriantation
Identify five practices in the above case study that are in contravention of the basic conditions of employment act
asked by Syabonga 
life orientation
1, Identify five practice that are in contravention of the basic conditions of employment ACT. 2,What according to the basic conditions of employment ACT applies with regard to the contravention that you have identify
asked by Nelly 
life orientation
1, Identify five practice that are in contravention of the basic conditions of employment ACT. 2,What according to the basic conditions of employment ACT applies with regard to the contravention that you have identify
asked by Nelly 
Life oriantation
Types of careers
asked by Syabonga 
Biology
Given that a cell's structure reflects its function, what function would you predict for a cell with a large Golgi apparatus?
asked by Tevin 
economics
1. If average movie attendance is 250 million when prices are $7 a ticket and 200 million when prices are $9 a ticket, the elasticity of demand for movie tickets is about: A. 0.0. B. 0.9. C. 1.1. D. 1.8.
asked by tania 
math
Suppose that people's heights (in centimeters) are normally distributed, with a mean of 170 and a standard deviation of 5. We find the heights of 80 people. (a) How many would you expect to be between 170 and 175 cm tall? (b) How many would you expect to
asked by Andrew 
Maximum Area
We have 900 ft of fencing and we want to construct a back yard. If we are using the building as part of the barrier for the yard what are the dimensions that allow maximum area? I am not even sure how to start though I know I am supposed to calculate the
asked by Lisa 
Physics
A pendulum has a period of 4.28 s on Earth. What is its period on Mars, where the acceleration of gravity is about 0.37 that on Earth?
asked by Andrew 
Physics
What is the period of a simple pendulum 83 cm long on the Earth?
asked by Andrew 
physics
You launch a model rocket up into the sky. Right after launch the rocket is accelerating upwards at 10 m/s2. What is the magnitude of the net force in Newtons on the rocket if the rocket has a mass of 0.1 kg?
asked by Anonymous 
math
use subsitution system to solve 4x+5y=21 Y=3x11
asked by lc 
maths
a number cosist of 2 digits.when the number is divided by the units digit.the answer is 3.if the digits are reversed.the new number exceeds the original no. by 36.determine the original number
asked by mpumelelo 
physics
Shyanne (60 kg) has to walk across a single rope bridge to cross a river. When she's at the exact middle point, the rope bridge is deflected at an angle of 15 degrees from the horizontal. What is the tension in the bridge?
asked by Matt 
Sociology
This is the reason an employer might restrict employee internet access? a. Employees waste too much time on the internet b. viewing certain kinds of sites could lead to a hostile work environment
asked by Chrissy 
life orientation
five practices that are in contravention of the basic conditions of employment Act.
asked by khodani 
Math
There are 16 cubic boxes of erasers in a case. What are all the possible dimensions for a case of erasers ? please help need in 30 minutes or less so confused help please thanks
asked by Chloe 
physics
Two circular holes, one larger than the other, are cut in the side of a large water tank whose top is open to the atmosphere. Hole 1 is the larger hole, and hole 2 is the smaller hole. The center of one of these holes is located 6 times as far beneath the
asked by chel 
physics
A lost shipping container is found resting on the ocean floor and completely submerged. The container is 5.7 m long, 2.7 m wide, and 2.3 m high. Salvage experts attach a spherical balloon to the top of the container and inflate it with air pumped down from
asked by chel 
physics
The concepts that play roles in this problem are similar to those in MultipleConcept Example 15, except the fluid here moves upward rather than remaining horizontal. A liquid is flowing through a horizontal pipe whose radius is 0.0215 m. The pipe bends
asked by chel 
Statistics
"Working Mom’s Journal" reported that the mean time a mother, with her small children, spends in at the convenience store is 7.3 minutes. A sample of 20 moms is chosen from your neighborhood, and it is found that the mean time they spend in a convenience
asked by Nadine 
physics
A gold prospector finds a solid rock that is composed solely of quartz and gold. The mass and volume of the rock are, respectively, 13.3 kg and 3.56 × 103 m3. The density of gold is 19 300 kg/m3, and the density of quartz is 2660 kg/m3. Find the mass of
asked by chel 
life orientation
Name three different media systems that can be found worldwide and each country where can be found.
asked by Anonymous 
Maximum AreaCalculusEdit
We have 900 ft of fencing and we want to construct a back yard. If we are using the building as part of the barrier for the yard what are the dimensions that allow maximum area? I am not even sure how to start though I know I am supposed to calculate the
asked by Lisa 
math
describe the transformation of y=log (x4) 1 2 from the graph of y=log X. 2 then state the asymptote and the domain range.
asked by lisa 
algebra
using substitution to solve 3x+y= 17 2x3y=23
asked by Anonymous 
algebra math
Lucas makes crosses out of a scrap piece of wood by cutting it into two pieces. He always makes the cut so that the cross piece is onethird the length of the vertical piece. If a length of scrap wood is 28 inches, what will be the length of each piece of
asked by Anonymous 
Mathematics. Geometric sequences.
2+4+8+...is a geometric sequence. Prove the sum of the first n terms is two less than the (n+1)the term.
asked by Olivia 
college general chemistry
3Co(NO 3 ) 2 (aq) + 2Na 3 PO 4 (aq) &> Co 3 (PO 4 ) 2 (s) + 6NaNO 3 (aq) how do I find the molar mass of precipitate.X hydrate
asked by Amber 
Algebra 1
There were 409 tickets sold for a basketball game. The activity card holder's ticket cost $ 1.75, and the noncard holder's ticket cost $2.25. The total amount of money collected was $753.75. How many of each kind of tickets were sold?
asked by Melessa 
math
2x+3y=13 5x+2y=16
asked by sara 
physics
The unitary rotation corresponding to this gate looks as follows: (assuming the first qubit is the control qubit)⎛⎝⎜⎜⎜⎜⎜⎜⎜⎜⎜⎜⎜100001000010000100000000000000000000000000000000A⎞⎠⎟⎟⎟⎟⎟⎟⎟⎟⎟⎟⎟
asked by Anonymous 
Science
What is my control in my science experiment I am running mice and hamsters threw a maze to which one can do it faster I can't figure out my control though?
asked by Jeanine 
Sentences
HOW DO YOU USE "PRIMARY ECONOMIC ACTIVITY" IN A SENTENCE?
asked by ME! PLZ HELP 
science
In the laboratory small zircon crystals were separated from granite (K). Isotopic analysis of these zircon crystals gives a 207Pb/235U ratio of 0.45. the halflife of 235U (7.04 × 108 years), estimate the age of the granite in Ma to two significant
asked by tanya 
geometry
#24. A cylindrical water well is 1,200 ft. deep and 6 in. across. Find the lateral surface area of the well. Round to the nearest square foot. (Hint: Convert measures to a common unit.)
asked by tmouery 
algebra
I have to solve this equation using substitution. 3x+5y=10 2x+ 1/2y=24 This is all one problem
asked by Erica 
Math
The ratio of black squirrels to brown squirrels is 8 to 13 If there were 231 total squirrels what percent to the nearest whole percent were black? And how many squirrels were brown?
asked by noahc 
Math urgent
If 3 consecutive integers add up to 27 , find the smallest of them. ( the answer is 8) but can you show me how pkeasee
asked by Mia 
Chemistry
How do I find the number of particles in 1 pound of NH3(Ammonia)?
asked by Sydney 
science
name two physical properties of an object about which you can gather qualitative data
asked by lola 
grammar..
1. How do I cite quotations of a play? 2. How do I punctuate block quote? *****EXAMPLES WOULD BE HELPFUL!
asked by Anonymous 
science
ms.sue is qualitative data the same thing
asked by lola 
math
4. Jenny swam 50 meters in 25 seconds. Which rate below is equivalent to Jenny's rate? (1 point) 1,200 meters in 8 minutes, 20 seconds 200 meters in 2 minutes 400 meters in 3 minutes, 20 seconds 800 meters in 4 minutes
asked by Bally 
Algebra 2 ...
* Simplify. a to the power of 4/3 times c ^1/6 all over 9b^3..... everything is in the parenthesis and is raised to the power of 2....times the whole thing to, a to the power of 3 times b to the power of two all over 3c.... everything is in the
asked by Anonymous 
science
how much sugar is dissolved in 50grams of a solution if the solution is 20% sugar by mass
asked by kevin 
science
what is qualitative data
asked by lola 
math
how to substitute 3x+y=11 4x5y= 22
asked by Anonymous 
Physical science
How much work is required to stop a car that is 800.0 kg car that is traveling at 20.0 m/s?
asked by Kizzy 
biochem
You have the following stock solutions and solid chemicals in your lab: 1.5M NaCL 0.2M Tris buffer, pH 8.0 10 mg/ml Bovine serum albumin (BSA) MgCl2 (solid, anhydrous) MW = 95.211 g/mole (95% pure) How would you make 250 ml of the following solution: 0.2M
asked by Shea 
Physical science
For magnitude of the force is 67n and force of friction is 34n
asked by Anonymous 
Physical science
How much work is required to stop a car that is 800.0 kg car that is traveling at 20.0 m/s?
asked by Kizzy 
life orientation
Name 3 different systems of media ownership that can be found worlwide.Name a country where each system can be found
asked by Anonymous 
Physics
A box is held against a wall (not resting on the ground). What minimum horizontal force will JUST prevent the 5.0kg box from sliding if the coefficient of friction betweent he wall and the box is 0.65?
asked by Julia 
chemistry
1L of a buffer composed of NaHC2O4 and Na2C2O4 has a pHof 4.0 and a total molarity of 1. a). what would the effect on the pH be of adding 1 gram of sodium hydrogen oxalate to this buffer? b). what would be the effect on the pH of adding 1 gram of sodium
asked by Ashley 
Stat Help Please
1)A runner's finishing time translated into a zscore of z=2.6 Explain in words whether the runner performed excellently or poorly? 2)Yearly stock returns on India's Sensex Index are well described by a Normal model with a mean of 18.36% and a standard
asked by Katy 
Chemisrty
How many kilojoules of heat are absorbed when 40.7g of MgO(s) is decomposed into Mg(s) and O2 (g) at constant pressure?
asked by Anonymous 
Sciience
Do you know what is qualitative data?Please help me
asked by Martin 
Math Help Please!!!!!
The number of pounds gained during pregnancy are normal with mean=30.23 and st. deviation=13.84 Determine the percent of women that gain between 20 and 30 pounds.
asked by Taylor 
Physical Science
A 250.0 kg roller coaster has 2.000 x 10^4 Joule of potential energy at the top of the hill , if the track is frictionless , what is the coasters velocity at the bottom of the hill?
asked by Kizzy 
algebra URGENT HELP
A)p(x)= x(x+2)(x4) b)p(x)=(x+2)^3(x1)
asked by zachary 
Calulus
Given \displaystyle \int_0^{\frac{3\pi}{2}} x^2\cos x \, dx = a  \frac{b\pi^2}{c}, where a, b and c are positive integers and b and c are coprime, what is the value of a + b + c?
asked by John 
Physics
You launch a model rocket up into the sky. Right after launch the rocket is accelerating upwards at 10~m/s^2. What is the magnitude of the net force in Newtons on the rocket if the rocket has a mass of 0.1 kg?
asked by John 
Math
Austin is in his pedal boat. It takes him 1.5 hours to travel 12 miles downstream and 6 hours to return. What is the rate of the current? Please show me how to solve it as well, I really have no idea. Thanks.
asked by Catherine 
language
preschoolers usually begin to add endings such as huh and okay to their questions around age. "
asked by ashworth 
Health
Do you need a facebook and/or twitter account to have a socialGO?
asked by Laruen 
english iii
why did john choose the room in the yellow wallpaper?
asked by sonia 
Statistics
Suppose. Population of testscores is normally distributed with mean 65 and standard deviation 13 x~n (65,13) if you select a test at randome what is the probability that the score is below 60 or that it is between 65 and 70 please show work!
asked by Alexa 
physics
If a baseball moving at 96 m/s toward homeplate over a distance of 16 m how much force does it take to make the ball go 50 m from home plate after it is hit?
asked by Jill 
Physical science
a 5.0 x 10^1g piece of a metal in thermal equilibrium with boiling water is removed and placed in 1.0 x 10^2g of a cooling water bath (specific heat= 1.00cal/g degrees celsius at 20.0 degrees Celsius . The final temperature of metal and the water bath is
asked by Kizzy 
Algebra 2....
Simplify.(Is this problem more clear than the previous post?) First part.. a^4/3 times c^1/6 all over 9b^3...everything is in the parenthesis and is raised to the power of 2 MULTIPLY TO THIS SECOND SET: a^3 times b^2 all over 3c.. everything is in the
asked by Anonymous 
math
3y+11=x 5x+3y==19 use subsittution
asked by Anonymous 
Math
WHAT SCHOLARSHIPS INVOLVE IN MATHEMATICS?
asked by Anonymous 
Termilogy
HIPAA guidelines related to medical transcription and transcription reports.
asked by Ultimatel Academy 
physics
How far from the center of the Earth must a 90 kg astronaut be in order for them to weigh 90 N? The mass of the Earth is 6 x 1024 kg.
asked by Anonymous 
physics
How far from the center of the Earth must a 90 kg astronaut be in order for them to weigh 90 N? The mass of the Earth is 6 x 1024 kg.
asked by Anonymous 
Science
Eighty calories must be added to one gram of I've at zero degrees Celsius to melt it. Whst is the approximate mechanical equivalent of this amount of energy?
asked by Bella 
Physics  URGENT
A car is speeding at constant velocity of 30ms1 in an 80kmh1 zone as it passes a stationary police motorcycle hiding. The motorcycle starts to accelerate at 5ms2 at the same instant the car passes it and continues for 8 seconds. It then stops
asked by Mariya 
Science
Liquid Nitrogen boils at 196 degrees Celsius . What is the temperture on the Kelvin scale ?
asked by Bella 
Physics  URGENT
A car is speeding at constant velocity of 30ms1 in an 80kmh1 zone as it passes a stationary police motorcycle hiding. The motorcycle starts to accelerate at 5ms2 at the same instant the car passes it and continues for 8 seconds. It then stops
asked by Mariya 
Stat Help Please
Yearly stock returns on India's Sensex Index are well described by a Normal model with a mean of 18.36% and a standard deviation of 14.65%. give the stock return cutoff for the middle 30% of all years. I used TI83 Calc. for these. Can someone check them?
asked by Taylor 
cis
You've decided to operate a day care home. Which one of the following factors is the most important in helping you make your decision
asked by bahira 
Maths
Chris spent 1/4 of his money to buy shirt .He spent 1/2 of remaining money to buy shorts.Given that Chris had left $56 left. How mush money did he at first?
asked by Sammi 
Chemistry
use the bronstedlowry model to label the acidbase pairs in the following equation for the ionization of water: H20(L) + H20(L) H30+(AQ) + OH(AQ). EXAPLAIN
asked by Juan 
Physics
A car is driven east for a distance of 46 km, then north for 29 km, and then in a direction 29° east of north for 22 km. Determine (a) the magnitude (in km) of the car's total displacement from its starting point and (b) the angle (from east) of the car's
asked by Michael 
medical coding
what are the three components that present in every patient case except counseling encounter or time based codes
asked by willie 
Life orientation
Five practices that are in Contravention of the Basic conditions of employment Act
asked by Simon 
math
The difference of the cubes of two consecutive odd positive integers is 400 more than the sum of their squares. Find the sum of the two integers.
asked by nice 
American History
What was the political goal of the Soviet Union following the end of WWII?
asked by Claire 
chemistry
7750 Joules of energy is added to a 325 grams stone at 24.0 degrees centigrade. The temperature increases by 75.0 degrees centigrade. What is the specific heat of the stone?
asked by basil 
Physics 11th grade
1) A racing car has a mass of 1525 kg. What is its kinetic energy if it has a speed of 35 m/s? 2) How much potential energy does Tim,with mass 60.0 kg, gain when he climbs a gymnasium rope a distance of 3.5 m? Benchmark Review
asked by Isis 
chemistry
7750 Joules of energy is added to a 325 grams stone at 24.0 degrees centigrade. The temperature increases by 75.0 degrees centigrade. What is the specific heat of the stone?
asked by basil 
life orientation
what unethical behaviour is taking place in the work place?
asked by Anonymous 
Physical Science
Calculate the number of grams of ice at 32 celsius that can be melted by 1g of 100 degrees celsius steam
asked by Asia 
chemistry
the maximum volume if Ziploc sandwich is 0.5 L at the pressure of 1 atm. use the gas law, calculate the pressure in the bag from the above volume of co2.
asked by mariah 
Introduction to Business Environment
1. An entrepreneur is an individual who has worked for a nonprofit organization for his entire career. (Points : 1) True False 2. In analyzing factors of production that make a country "rich," it has been observed that some relatively poor countries often
asked by David 
social studies
Can you describe the kinds of conflicts that developed as europeans settled the americas?
asked by anjalie 
Physical Science
A 1.00 kg block of ice at zero degrees celsius is added to a picnic cooler. How much heat will the ice remove as it melts to water at zero degrees Celsius?
asked by Asia 
chemistry
The equilibrium bond length of 1 H35Cl is 126 pm. What is wavelength of the required electromagnetic radiation to excite the rotational state from j=1 to j=2? The masses of 1H and 35Cl are 1.0078 amu and 34.9689 amu, respectively)
asked by StressedStudent 
strategic ffinancial mangement
XYZ company is contemplating the purchase of a new machinery costing rupees 30000with an expected life of 5 year at the end of which period , it can be solved for rupees 750 thousand in replacement of an old machine purchased 3 years ago for rupees 15000
asked by shruti sieth 
Math
How do you solve negative exponents?
asked by Kate 
Math
I cant figure this out! Can someone please tell me were my mistake is?? :)  a man is 3 times as old as his son. In 11 years time he will be twice as old as his son will be. Let s represent sons age in years now I did: present man: 3s son: s In 11 years
asked by Mia 
statistics
Last semester, a certain professor gave 23 As out of 279 grades. If one of the professor's students from last semester were selected randomly, what is the probability that student received an A? (Assume that each student receives one grade.)
asked by TASHA 
chemistry
What volume of oxygen is consumed when 9g of water is formed when butane is burnt?
asked by Oliver 
math
The breaking strength (in pounds) of a certain new synthetic is normally distributed with a mean of 175 and a variance of 4. The material is considered defective if the breaking strength is less than 170 pounds. What is the probability that a single,
asked by Andrew 
Math
find the surface area and volume of a similar figure that is larger by scale factor of 25 using 3.14//// 5ft, 4ft, 3ft
asked by Kee Kee 
Introduction to Business Environment Chapter 2
The world's population is growing more slowly than expected, and there are some industrial countries in which growth might be so slow that there will be too many old people and too few young people to support them. (Points : 1) True False 2. In a free
asked by David 
eco
2. It has been estimated that the price elasticity of demand for attending baseball games is 0.23. Other things held constant, a 10 percent increase in attendance can be explained by a: A. 43.48 percent fall in the price of a ticket. B. 43.48 percent rise
asked by tania 
Math
How do you solve negative exponents?
asked by Kate 
maths
Two walkers set off at the same time from a crossroad and walk along flat straight roads inclined to each other at 68 degrees.If they both walk at a speed of 6km/h,find their distance apart 10 minutes later.
asked by Shane 
mathsmensuration
The boy having a gold coin of diameter 2cm and thickess 2mm to a goldsmith for melting and drawing into a wire of diameter 1mm . the gold smith gave back a wire of gold of length 76cm with diameter 1mm. if the wastage allowed in melting could be a maximum
asked by anoynomous 
maths
A tourist viewing Sydney Harbour from a building 180 metres above sea level observes a ferry which is 850 metres from the base of the building.Find the angle of depression of his line of sight.
asked by Shane 
College Mathematics
Probability: "or" and "and" problem. Select one card, one card is selected from a deck of playing cards. Determine the probability of selecting a jack or a club.
asked by slomomo 
maths
From an aircraft flying at 8000 metres above sea level the angle of depression of a ship is 36 degree15 minutes.How far is the ship from the plane in a straight line?
asked by Shane 
Maths
The top of a T .V .tower casts a shadow 35 metres long when the angle of elevation of the sun 57 degree40 minutes.How high is the top of the tower?
asked by Shane 
Stats
Suppose you have a standard deck 52 cards (4 suits: hearts, diamonds, clubs, and spades each suit has 13 cards (1/4 of the deck) and those 13 cards include one ace,and numbers 2 through 10 and 3 face cards: a jack a queen and king) suppose you pick a card
asked by Anonymous 
maths
A surveyor finds two points A and B on a hillside to be 114.6 metres apart(measured along the line of sight) and finds the angle of elevation from A to B to be 21 degrees.On his plans these points must be shown at their horizontal distance apart.Find this
asked by Shane 
maths
In kindergarten question it is asked to lay counters 5 _ 3 _ what does lay counter means
asked by Surbhi 
Trigonometry
If g(t) = 5t+1 and h(n) = 2(n  7), what is the value of h(g(3))?
asked by John 
math help
it is 300 tv and 100 refrigerators Shipping restrictions. The accompanying graph shows all of the possibilities for the number of refrigerators and the number of TVs that will fit into an 18wheeler. 300 tv 100 refrigerators a) Write an inequality to
asked by Anonymous 
maths
A farmer had a plot in the shape of a parallelogram. He divided into three equal parts, each of which was a separate parallelogram. He then gave his son onethird of the land. The son, who realized that the district in which he lived had no school, decided
asked by anoynomous 
Calculus
Evaluate \displaystyle \int_1^{10} \left(\sqrt{x} + 1\right)^3 dx  \int_1^{10} \left(\sqrt{x}  1\right)^3 dx .
asked by John 
Statistics
We are given this table which is Benford law for these questions they are used for filling your taxes: k= p(X=k) 1 0.301 2 0.176 3 0.125 4 0.097 5 0.079 6 0.067 7 0.058 8 0.051 9 0.046 1.) If you select two numbers randomly from any where on your taxes
asked by Anonymous 
History
where can I find thesis of women right Seneca fall convention. How did it happened? The effect? When did it start?
asked by maria 
Calculus
For the following demand equation compute the elasticity of demand and determine whether the demand is elastic, unitary, or inelastic at the indicated price. (Round your answer to three decimal places.) x + (1/9)p  27 =0 ; p=23
asked by Tay 
Statistics
A company that manufactures exercise machines wanted to know the percentage of large companies that provides onsite health club facilities. A sample of 240 such companies showed that 96 of them provide such facilities on site. a. What is the point
asked by Steven 
Statistic HELPPPPPP
A linear model can be used to describe the relationship between fuel economy(mpg) and horsepower (hp) for certain automobile models. mpg=46.8680.0838 hp R^2=75.5% 1) Give the symbol and the value of the correlation coefficient. 2)What would the gas
asked by Melissa 
angles
A survey team is trying to estimate the height of a mountain above a level plain. From one point on the plain, they observe that the angle of elevation to the top of the mountain is 25 degrees. From a point 1225 feet closer to the mountain along the plain,
asked by tyler 
Business
Examples of corporate social responsibity invovement by anglo american,Nedcor and absa
asked by Anikie 
Geometry
Martin's iPod has 24 songs on it. He wants to make a playlist consisting of three songs to dance to. Let N be the number of different playlists Martin can make. What are the last 3 digits of N?
asked by John 
Chem
a 1.00 vessel at 0 degrees celcius contains 0.17 mols n2 1.0 mols h2 and 1.0 mols CH4 calculate the pressure of the gas mixture and the partial pressure of each constituent gas in the mixture. Ptotal= ? Pn2=? Ph2=? PCH4?
asked by Anonymous 
Geometry
In the 2001 population census, information was collected about the number of people in each household, which is denoted by X. It is given that P(X=1) = 0.25, P(X=2) = 0.32, P(X=3) = 0.18, P(X=4) = 0.15, P(X=5) = 0.07, P(X=6) = 0.02 and P(X\geq 7) = 0.01.
asked by John 
Geometry
What is the minimum distance between any point on the circle x^2 + y^2 = 25 and the line y = \frac{3}{4}x + \frac{75}{4} ?
asked by John 
College Mathematics
(odds) Playing Bingo:When playing bingo, 75 balls are placed in a bin and balls are selected at random. Each ball is marked with a letter and a number as indicated in the following chart: B: 115 I: 1630 N:3145 G:4660 O:6175. For example there are
asked by slomomo 
Chemistry
A sample of gas weighs 2.832g and has a volume of 1010.0 ML at 775.0 torr and 31.0 degrees Celsius what is its molar mass?
asked by Anonymous 
Khudu secondary
Car A of mass 1 000 kg,stationary at a traffic light,is hit from behind by car B of mass 1 200 kg,traveling at 18 m.s1. Immediately after the collision car A moves forward at 12 m.s1. 1. Assume that linear momentum is conserved during this collision.
asked by Antony 
business math/finance
1. If you were to place $15,000 in the bank at 3% interest, how much would you have in the bank after one year if the interest were compounded quarterly?
asked by shaunta 
life orientation
what are the conditions of employment act applies the contravention?
asked by loliswa 
physics
determine the magnitude of the centripetal force that acted on the whirling ball??
asked by stephie 
Physics
The system has two wheels and requires an effort of 12N to lift a load of 4kg at constant speed. Find M.A nd V.R.. Calculate work done by effort to raise load of 2m and efficiency of this machine.
asked by Mutale 
Math
Ok, 1 football equals 13 ounces. 10 footballs would equal 130 ounces (right?). In order to find out how many pounds 10 footballs equal, would you divide 130 divided by 16?
asked by Adaija 
physics
Gymnasts can do all sorts of ridiculous tricks on various equipment. In the rings event, the gymnast is supported by two rings attached by cords to the ceiling (see a picture here). If a gymnast weighs 75 kg and is motionless on the rings, what is the
asked by ayan 
Physical Science
How do you get the velocity of a roller coaster when you are only given 250.0kg and 2.000x10^4 Joules
asked by Bella 
Graphing Circles  Finding the radius
A circle is tangent to the yaxis at the point (0,2) and passes through the point (8,0). Find the radius of the circle. I tried using distance formula but it doesnt work? Help please thanks.
asked by Knights 
English
What is noun?
asked by Ralph 
Physical Science
How do you calculate the number of grams of ice at 32 degrees celsius that can be melted by 1g of steam?
asked by Bella 
Calculus Derivative Taylor Series?
let f(x)= x/x1 find f'(x) f ''(x) and a formula for f ^ (n) * x. I found the first and second derivatives but do not know how to make a general equation for this. I have not learnt the Taylor or Maclaurin Series either. Thank you.
asked by Lisa 
Trig
the height of a flagpole if a student stands 37 feet from it and determines the angle of elevation to be 34 degrees and her eyes are 5.3 feet from the ground.
asked by David 
stats
Suppose that 50 identical batteries are being tested. After 8 hours of continuous use, assume that a given battery is still operating with a probability of 0.70 and has failed with a probability of 0.30. What is the probability that fewer than 40 batteries
asked by cate 
stats
The following data were obtained from a survey of college students. The variable X represents the number of nonassigned books read during the past six months. x 0 1 2 3 4 5 P (X=x) 0.20 0.25 0.20 0.15 0.10 0.10 Find P( X > 1)
asked by cate 
Physics
Buffy the Vampire Slayer is buffing up her 0.53 meter long arms by bench pressing. In 35 seconds she can lift 38 kilograms of mass 23 times. How powerful are Buffy's arms?
asked by Anonymous 
stats
An ice cream vendor sells three flavors: chocolate, strawberry, and vanilla. Forty five percent of the sales are chocolate, while 30% are strawberry, with the rest vanilla flavored. Sales are by the cone or the cup. The percentages of cones sales for
asked by cate 
stats
Mothers Against Drunk Driving (MADD) is a very visible group whose main focus is to educate the public about the harm caused by drunk drivers. A study was recently done that emphasized the problem we all face with drinking and driving. Five hundred
asked by cate 
chem biochem bio
You have the following stock solutions and solid chemicals in your lab: 1.5M NaCL 0.2M Tris buffer, pH 8.0 10 mg/ml Bovine serum albumin (BSA) MgCl2 (solid, anhydrous) MW = 95.211 g/mole (95% pure) How would you make 250 ml of the following solution???
asked by mel 
mathscircles
can we create a unique circle with two colinear points
asked by anoynomous 
math
solve each equation 1) log5log2x=1 2) 2log(x+1)=5
asked by lisa 
physical Science
The Mass Of A Minibus with The Driver is 1500 kg.the Driver Is Moving At A Speed Of 30 m.s When He Notices That The traffic light Ahead Have turned To red.he Applies A Force Of 9000N on the brake pedal. A)calculate his deceleration if the taxi is empty
asked by vuyo 
chemistry help !!!!!!!!!!!!!!!!
a)A N6+ ion in its ground state absorbs an Xray photon of energy 2.0000 keV. Explain what happens to the ion and why. b)Explain why the nitrogen ion N6+ is a hydrogenlike ion. Assuming the ion is for the major stable isotope 14N, state which subatomic
asked by john 
Math
Find a polynomial whose zeroes are double the zeroes of P(x)=x^37x^25x+2.
asked by Lala 
chemistry
a solution (S) is prepared by dissolving 50.0 g calcium chloride in 250 ml volumetric flask wich is then filled with distilled water up to the line mark. calculate the molar concentration of solution (S)
asked by alia 
business
What are the core business activities of anglo american,nedcor and absa
asked by Anikie 
political science
which political ideology would be against abortion, and why?
asked by nina 
Quantum M.
Why "In Hilbert Space noone can hear you scream"?
asked by Jess 
eth 125 Wk 5
what the the economic, social and political standing of african americans in todays society
asked by linda 
Physics
Suppose you wish to make a solenoid whose selfinductance is 1.6 mH. The inductor is to have a crosssectional area of 1.3 x 103 m2 and a length of 0.065 m. How many turns of wire are needed?
asked by Tonya 
science
There are four forces in nature. Name the four forces and rank them from strongest to weakest.
asked by alex 
science
There are three particles inside an atom. One of them has zero electric charge. Which one is it?
asked by alex 
physics
A wire that is 46 cm long is parallel to a 0.54 T uniform magnetic field. The current through the wire is 4.5 A. What force acts on the wire?
asked by Jeff 
physics
A wire that is 630 m long is perpendicular to a 0.31 T magnetic field. A 1.8 N force acts on the wire. What current is in the wire?
asked by Jeff 
physics
The force acting on a wire that is at right angles to a(n) 0.80 T magnetic field is 2.1 N. The current in the wire is 6.7 A. How long is the wire?
asked by Jeff 
physics
A wire that is 0.45 m long and carrying a current of 9.5 A is at right angles to a 0.40 T magnetic field. How strong is the force that acts on the wire?
asked by Jeff 
physics
A 36 cm long copper wire carries a current of 6.0 A and weighs 0.45 N. A certain magnetic field is strong enough to balance the force of gravity on the wire. What is the strength of the magnetic field?
asked by Jeff 
MATH
There is a slide in the park that is 18 feet long. The ladder to the top of the slide is 7.5 feet long. If the ladder and the slide are perpendicular, what is "D", the distance from the top of the slide to the ground? Explain how you got your answer.
asked by SARA 
World Mythology
Discuss what the Egyptian stories of Isis, Osiris, and Horus reveal about Egyptian culture and what The Enuma elish reveals about Babylonian culture. How, in particular, do their stories reflect the beliefs of their respective peoples?
asked by Daniel 
information technology help
give the weakness of microsoft power point with solution. 5 point
asked by yaya 
math
make up a set of 15 numbers with the following landmarks: maximum: 152 Range: 25 Mode: 139 Median: 142
asked by John 
Physics
How much work can a 252 W motor accomplish in 13 seconds?
asked by Anonymous 
LIFE ORIENTATION
INVESTIGATE AND EXPLAIN 3 ROLES AND 3 RESPONSIBILITIES OF MEDIA
asked by ASANDA 
maths
IN KINDERGARTEN HOMEWORK IT ASK TO LAY COUNTERS AND FEW NUMBERS ARE GIVEN LAY COUNTERS 5 _ 3 _ ETC WHAT DOES LAY COUNTER MEANS
asked by Surbhi 
physics
At what height above Earth's surface is the gravitational acceleration reduced from its sealevel value by 0.60%?
asked by joey 
Physics
Suppose H⊗3ϕ⟩=(1/2)√(000⟩+111⟩). What is ϕ⟩? Specify the probability amplitude for each component:
asked by RCH3 
aig math
Janet has 73 coins. Linda has 28 more coins then Janet, but 17 fewer coins than Alan. Sam has 33 fewer coins than Alan. How many more coins does same have than Janet? My answer is 12 coins, am i right? If not please tell me your answer and how you got it.
asked by lidia 
Math
A rectangular plot, 21m by 14m, is to be turned into a rectangular flower bed with a grass border around its outside edge. The grass border is to be 2m wide. What is the area of the flower bed? What is the area of the grass border?
asked by Josh 
chemistry
H2(g) + I2(g) *) 2HI(g) + heat Which response includes all the following that will shift the equilibrium to the left, and no others?
asked by Anonymous 
math
log(3x+1)=2
asked by lisa 
chemistry
H2(g) + I2(g) *) 2HI(g) + heat Which response includes all the following that will shift the equilibrium to the left, and no others?
asked by Anonymous