Questions Asked on
March 12, 2012

Chemistry
1) Prepare 100mL of 10%w/w HCl from 37%concentrated HCl(density of 37%HCl =1.19g/ml) 2) Prepare 100mL of 10%w/v HCl from 37% concentrated HCl(density of 37%HCl=1.19g/ml) Can you please show the calculation steps for 1) & 2)? Is 10%w/v HCl the same as
asked by Annie 
English 11
1. Olaudah Equiano wrote (1 point) a book of letters to his African family. a history of the West Indian slave trade. stories of early slavery in Virginia. the first autobiography by a black man in America. 2. The term “the Middle Passage” refers to (1
asked by robert 
math  calculus
Suppose that water is pouring into a swimming pool in the shape of a right circular cylinder at a constant rate of 9 cubic feet per minute. If the pool has radius 3 feet and height 11 feet, what is the rate of change of the height of the water in the pool
asked by Justine 
Living Environment(please check answers)
1true 2false 3not enough info Transplanting genetic material into bacteria is a simple task 2 Under certain conditions, bacteria reproduce at a rapid rate3 The continued use of insulin from animals many cause harmful side effects in some people 1 The
asked by Anna 
critical thinking test AU
1. Question : The average height of members of the high school basketball team is six feet, three inches. Jerry is on the high school basketball team, so Jerry must be taller than six feet. The argument above is flawed because it confuses: Student Answer:
asked by jack 
physics
Calculate the resistance of a 900 watt toaster operating at 120 volts. a) R= 10 ohms b) R=120 ohms c) R= 16 ohms d) R=1.6 ohms
asked by Thomas 
Math:Trig.!!!!
You (safely) bungee jump from a 200feet tall bridge in your town. Your distance above the water's surface depends on the time since you jumped. Sketch a reasonable graph.
asked by Claries 
AP CHEMISTRY
Calculate the solubility of Mn(OH)2 in grams per liter when buffered at each of the following. a) pH 7.4 b) pH 9.2 c) pH 11.5 ALL IN GRAMS PER LITER. PLEASE HELP ME AND EXPLAIN
asked by HELP PLEASE 
chemistry 30a
What volume (in mL) of an 8% w/v acetic acid solution would be needed to form 2.2 L of carbon dioxide gas at 25.2 degrees Celsius and 0.9982 atm? Assume the acid is reacted with excess sodium bicarbonate, and round your final answer to two sig figs.
asked by sara 
The Great Gatsby
Why did Daisy and Tom spend a year in France? in the great gatsby They wanted their little girl to learn French. There was no reason. Tom’s family bought a house in Paris. i believe the answer is 3?
asked by LAYLA 
AP CHEMISTRY
Suppose that a 15mL sample of a solution is to be tested for I ion by addition of 1 drop (0.20 mL) of 0.30 M Pb(NO3)2. What is the minimum number of grams of I that must be present for PbI2(s) to form? (Ksp = 7.9 109)
asked by HELP PLEASE to DrBob222 
physics
A car (mass=1100kg) is traveling at 32m/s when it collides head on with a sport utility vehicle (mass=2500kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. at what speed was the sport utility vehicle traveling.
asked by Natasha 
CALCULUS
A cylindrical oil storage tank 12 feet in diameter and 17feet long is lying on its side. Suppose the tank is half full of oil weighing 85 lb per cubic foot. What's the total force on one endof the tank?
asked by Mishaka 
physics
In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler, running at a velocity of 4.5m/s, grabs him. The tackler holds onto the receiver, and and the two move off together with a velocity of 2.6m/s. The
asked by Natasha 
Chemistry
Calculate the percent ionizationof a 0.15 M benzoic acid solution in pure water Nd also in a solution containing 0.10M sodium benzoate. Why does the percent ionization differ significantly in the two solutions?
asked by L.Bianchessi 
Physics
Starting from rest, a 1.6x104 kg flea springs straight upward. While the flea is pushing off from the ground, the ground exerts an average upward force of 0.42 N on it. This force does 3.6x104 J of work on the flea. (a) What is the flea's speed when it
asked by April 
science
how far will 350 jules raise a block weighing 7n
asked by christian 
liviing environment
Transplanting genetic material into bacteria is a a simple task?
asked by Anna 
chemcarbs
Dribose is treated with a mild oxidizing agent. What is the product of this reaction?
asked by casey 
Calculus (Definite Integrals  Force) Please Help
A cylindrical oil storage tank 12 feet in diameter and 17feet long is lying on its side. Suppose the tank is half full of oil weighing 85 lb per cubic foot. What's the total force on one endof the tank?
asked by Mishaka 
algebra
ben bought a car for $20,000 in 2003. The car depreciates at a constant rate of 21% per year . Find the price of the car in the year 2010 . Round to nearest dollar
asked by Johnson 
physics
Am 85kg jogger is heading due east at a speed of 2.0m/s. A 55kg jogger is heading 32 degrees north of east at a speed of 3.0m/s. Find the magnitude and direction of the sum of the momenta of the two joggers.
asked by Natasha 
Physics
A 500.0 g metal block absorbs 3.25 × 103 J of heat to raise its temperature by 50.0 K. What is the substance? Please show steps because I have several problems like this and then I can see where I am goibg wrong
asked by Pat 
CHEM HELP!
NH4HSNH3+H2S What is the minimum mass of NH4HS that must be added to the 5.00L flask when charged with the 0.300g of pure H2S, at 25C to achieve equilibrium?? Kp=.120 at 25C initial pressure of H2S in flask = .0431atm partial pressures of H2S and NH3
asked by student 
Chemistry 2
An industrial chemical reaction has a rate law: rate = k [C]. The activation energy for the reaction is 3.0000 x 10^4 J/mol and A = 2.000 x 10^3. What must be the reaction temperature if a rate of 1.000 x 10^9 M/s is required and [C] must be kept at
asked by Jessica 
Calculus (Definite Integrals  Fluid Pressure)
The ends of a water trough have the shape of the region bounded by the graphs of y = x2 and y = 4 with x and y both measured in feet. To what depth must the trough be filled with water so that the force exerted by the water on either end of the trough is
asked by Casablanca 
Chemistry
write the balanced chemical equation for reaction the following chemical reaction ozone gas, O3 , reacts with 3,3,4,4,5,5hexamethyl1hexyne, HCßCC(CH3)2C(CH3)2C(CH3)2CH3 to produce carbon dioxide gas, CO2 , and water gas , H2O . When balancing
asked by Susan 
chemistry
H2SO4(aq) + NaOH(aq)> Na2SO4(aq) + H2O(l) Consider the unbalanced equation above. What is the concentration of the original sulfuric acid solution if 60.5 mL of the acid reacts with 18.0 mL of 0.110 M sodium hydroxide?
asked by jade 
Chem!!!:/
Calculate the ratio of NaF to HF required to creAte a buffer with pH=4.00.
asked by Davis 
physics
A baseball (m = 151 g) approaches a bat horizontally at a speed of 39.8 m/s (89 mi/h) and is hit straight back at a speed of 45.7 m/s (102 mi/h). If the ball is in contact with the bat for a time of 1.05 ms, what is the average force exerted on the ball by
asked by Natasha 
business
Mel's Furniture received an invoice dated September 27 for five bedroom sets at $3,000 each. The invoice indicated a trade discount of 5/8/3. The seller of the furniture prepaid the freight of $200. Terms were 2/10 EOM.Assuming Mel pays on November 2, what
asked by shawn 
Statistics
The distribution of scores on a test is moundshaped and symmetric with a mean score of 78. If 68% of the scores fall between 72 and 84, which of the following is most likely to be the standard deviation of the distribution? 3, 1, 4, 6?
asked by MJ 
Chemistry
Why is a small amount of solute added in the electrolysis of water?
asked by Chemo 
chemistry
Carbon monoxide gas and hydrogen gas are mixed in a two liter flask. The reaction produces methanol gas as the only product. At equilibrium the Keq is 1.1 x 105. The flask initially held 6 grams of hydrogen and the equilibrium concentration of hydrogen is
asked by Don 
TrigAlgebra help asap
The adjacent sides of a parallelogram measure 8 cm and 12 cm and one angle measures 60 degrees. Find the area of the parellelogram.
asked by Missy 
chemistry
The urine excreted by an adult patient over 24 hours was collected and diluted to give 2.000L sample. at ph 10 EDTA FORMS 1:1 COMPLEX WITH BOTH Mg2+ and Ca2+ and after buffering at this pH a 10mL aliquot of the sample required 26.81mL of 0.003474M EDTA for
asked by jenny 
Calculus
Using the trapezoid rule with n = 8 to approximate the arc length of the graph of y = 2x^3  2x + 1 from A(0,1) to B(2,13) you get (to three decimal places): A.) 6.900 B.) 13.896 C.) 14.093 D.) 13.688 E.) 13.697
asked by Mishaka 
physics1
at a playground a child slides that makes a 42 degrees angle with the horizontal direction.The coefficient of kinetic friction for this motion is 0.20 What is the magnitude of her acceleration during her sliding
asked by thandeka 
Calculus (Definite Integrals  Arclength)
Using the trapezoid rule with n = 8 to approximate the arc length of the graph of y = 2x^3  2x + 1 from A(0,1) to B(2,13) you get (to three decimal places): A.) 6.900 B.) 13.896 C.) 14.093 D.) 13.688 E.) 13.697
asked by Mishaka 
Physics
A student throws a baseball vertically upward, and 2.8s later catches it at the same level. Neglecting air resistance , calculate the following (a) the velocity at which the ball left the students hand (b) the height to which the ball climbed above the
asked by Melissa 
Physics
A car accelerates uniformly from rest to 21.0 m/s in 6.1 s along a level stretch of road. Ignoring friction, determine the average power required to accelerate the car if the weight of the car is the following. A) 8.0e3N B) 1.2e4N (The answer needs to be
asked by Natasha 
Science
Which of the following materials will burn the fastest in open air? A. a log, two feet in diameter B. two logs, each one foot in diameter C. a pile of small splinters made from a twofoot diameter log D. Both logs and the splinters will burn at the same
asked by Samantha 
Chemistry
Kp=1.6 Kp=1.0*10^4 A2B Find the equilibrium partial pressures of A and B B=1.0 atm A=0.0 atm This is what I have so far A 2B 0 1.0 +p p p 1p [B]^2/A (1p)^2/p = 1.6 then got a quadratic equation of p^2+1.6p1 to get x=.48
asked by maura 
Physics 111 PLEASE HELP ASAP
A 37.5kg child swings in a swing supported by two chains, each 3.05 m long. The tension in each chain at the lowest point is 433 N. the force of the seat on the child is 498.5 N. b)Find the force exerted by the seat on the child at the lowest point.
asked by lily 
Vectors
a river is 2 km wide and flows at 4km/h. a motorboat has a speed of 10 km/h in still water and heads out from one bank. a marina is directly across the river, on the opposite bank. if the motorboat heads directly toward the marina, how far downstream from
asked by Tarkan 
chemistry
The time required for the completion of 99.9% of a first order reaction is equal to how many times that of its half life? (A)2 (B)3 (C)5 (D)10
asked by Poonam 
MATHS
In triangle ABC, BC is produced to D. If angle ACD = 110 degree and angle ABC = 70 degree. Find angle BAC. Give reason.
asked by Job 
physics
A two staged rocket moves in space at a constant velocity of 4900m/s. The two stages are then separated by a small explosive charge between them. Immediately after the explosion the velocity of the 1200kg upper stage is 5700m/s in the same direction as
asked by Natasha 
Algebra
The value of almost everything you own, such as a car, computer, or appliance, depreciates over time. When the value decreases by a fied amount each year, the depreciation is called straightline depreciation. Suppose your car has an initial value of
asked by kim 
Physics
Calculate the resistance of a 900 watt toaster operating at 120 volts. Which formula do you use?
asked by Matt 
AP CHEMISTRY
An experiment was carried out to determine the value of the equilibrium constant Kc for the reaction. Total moles of Ag+ present = 3.6 x 103 moles Total moles of NH3 present = 6.9 x 103 moles Measured concentration of Ag(NH3)2+ at equilibrium= 3.4* 102
asked by Jamba 
math
using two fair dice, what is the probability of rolling a sum that exceeds 4?
asked by christine 
chemistry
CrCl3(s) + AgNO3 (aq)= AgCl(s) + Cr(NO3)3(aq) A 0.750 g sample of impure CrCl3 was removed from a bottle that contained 1.75 g of impure sample. The removed sample was dissolved in water and required 42.5 mL of 0.215 M AgNO3 solution to react with the
asked by jade 
Chemistry
how do I balance the following skeleton redox equation for a reaction occurring in acidic solution. HNO2 + MnO4 yield to Mn2+ + NO3
asked by Rachel 
Science (Chemistry)
How many grams of dry NH4Cl need to be added to 1.90 L of a 0.200 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.99? Kb for ammonia is1.8*10^5. Can anyone help me with this question? I have no idea how to solve it.
asked by Taylor 
Chemistry
you add excess sodium sulfate to a solution of a soluble barium compound in order to precipitate all of the barium ion as barium sulfate, BaSO4. Suppose a 458 mg sample of the barium compound is dissolved to create the solution. Then when the sodium is
asked by India 
chemistry
Al(s) + H2SO4(aq)> Al2(SO4)3(aq) + H2(g) Consider the unbalanced equation above. What volume of 0.490 M H2SO4 is needed to react with excess aluminum to produce 1.60 g of Al2(SO4)3? Use a molar mass with at least as many significant figures as the data
asked by jade 
ChemB
A forming acid solution has a pH of 3.25. Which of these substances will raise the pH of the solution upon addition? Explain. A) HCl B) NaBr C) NaCHO2 D) KCl
asked by ALISON 
organic chemistry
How many steric interactions are there in CIS1,3dimethylcyclohexane? Which groups participate in the interactions and whats the total number of interactions of this type??? Also, if i have the steric strain value for one 1,3 HCH3 interaction, how can i
asked by Alex 
physics
A ball on the end of a string is revolving at a uniform rate in a vertical circle of radius 98.8 cm. If its speed is 4.60 m/s, and its mass is 0.345 kg, calculate the tension (in newtons) in the string when the ball is at the bottom of the path.
asked by george 
Calculus (Definite Integrals  Work)
Recall that work is defined to be force times distance, and that the weight (force) of a liquid is equal to its volume times its density. A fish tank has a rectangular base of width 2 feet and length 6 feet and sides of height 5 feet. If the tank is filled
asked by Mishaka 
ChemB
CALCULATE PH OF THE SOLUTION THAT RESULTS FROM EACH SOLUTION A) 150.0mL OF 0.25M HF WITH 225.0 mL OF 0.30M NaF Help please, these buffer questions are confusing.
asked by ALISON 
math
dollar makup $4.70 percent markup on cost 102.17% What is the cost and selling price?
asked by bula 
College Physics
It takes 164 kJ of work to accelerate a car from 23.7 m/s to 27.8 m/s. What is the car's mass? I tried using this equation but it didn't work KE = 1/2mv^2
asked by Anonymous 
Math
Suppose that z is inversely proportional to y and that z=12 when y=16. Write an equation that expresses z in terms of y.
asked by Anastasia 
Chemistry
Assume you begin with 60 g of water at 20 oC and 60 g of water at 80 oC. After adding the two portions of water into your calorimeter, you determine the temperature of the mixed portions of water to be 45 oC. What is the heat capacity of the calorimeter?
asked by Alex 
political science
which of the following terms describe America's fundamental political values? a) internationalist & isolationiat b) inedpendent & moderate c) Republican & Democrat d) liberal & conservative e) liberty, equality & democracy
asked by tina 
Chem AP help!
A zinccopper battery is constructed as follows at 25°C: Zn  Zn2+(0.15 M)  Cu2+(1.70 M)  Cu The mass of each electrode is 150. g. The cell potential when the cell is first attached is 1.13V How long can this battery deliver a current of 5.00 A before
asked by Daya 
algergra
determine the amount of an inverstment if 400.00 is invested at an interest rate 7.25% compounded quarterly for 7 years
asked by Anonymous 
Physics
A 15 kg uniform disk of radius R = 0.25 m has a string wrapped around it, and a m = 3.3 kg weight is hanging on the string. The system of the weight and disk is released from rest. When the 3.3 kg weight is moving with a speed of 2.1 m/s, what is the
asked by Emma 
physics
The mass of a regulation tennis ball is 62.0 (although it can vary slightly), and tests have shown that the ball is in contact with the tennis racket for 34.0 . (This number can also vary, depending on the racket and swing.) We shall assume a 34.0 contact
asked by Jodi 
physic
Tarzan plans to cross a gorge by swinging in an arc from a hanging vine. If his arms are capable of exerting a force of 1820 N on the rope, what is the maximum speed (in meters/second) he can tolerate at the lowest point of his swing? His mass is 83.0 kg,
asked by vickie 
Physics
A athlete in good physical condition can land on the ground at a speed of 12m/s without injury , calculate the max height from which the athlete can jump without injury, assuming the takeoff speed is zero
asked by Melissa 
Science
The line spectra of two elements are not identical because (A)The element do not have the same number of neutrons (B)They have different mass numbers (C)Their outermost electrons are at different energy levels (D)They have different valencies
asked by Poonam 
chemistry
what are the solute particles present in boric acid (H3BO3)?
asked by jade 
math
in a recent poll of city voters it was found that 90% liked the view of the city skyline.find the probability that exactly 2 voters in a sample of 5 voters will like the viewof the city skyline.
asked by crystal 
Econ
How does the aggregate goods and services market differ from the regular (microeconomic) supply and demand market? In other words, how does aggregate demand and aggregate demand differ from normal supply and demand? Address the measures of price, quantity,
asked by Lisa 
physics
A car (mass=1100kg) is traveling at 32m/s when it collides head on with a sport utility vehicle (mass=2500kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. at what speed was the sport utility vehicle traveling.
asked by Natasha 
Chemistry
you add excess sodium sulfate to a solution of a soluble barium compound in order to precipitate all of the barium ion as barium sulfate, BaSO4. Suppose a 458 mg sample of the barium compound is dissolved to create the solution. Then when the sodium is
asked by India 
Finance
Firm A has $10,000 in assets entirely financed with equity. Firm B also has $10,000 in assets, but these assets are financed by $5,000 in debt (with a 10 percent rate of interest) and $5,000 in equity. Both firms sell 10,000 units of output at $2.50 per
asked by John 
Algebra
The area of a circle is given by the formula A+pier^2, where r is the radius. If increasing the radius of a circle by 1 inch gives the resulting circle an area of 100pie square inches, what is the radius of the original circle?
asked by Savannah 
english 10
Writing under the name of Diedrich Knickerbocker Washington Irving aimed his potent satire at as diverse topics as political rivals such as Thomas Jefferson to the very ideal of looking back on the past affectionately: A fine lady, in those times, waddled
asked by Anonymous 
human resources
A truck costing $25,000 with a residual value of $5,000 was purchsed by Rim Corporation. The truck's estimated life is 10 years. At the end of Year 2,what is the book value using decliningbalance method? assume a depreciation rate of twice the
asked by shawn 
physics
a series RLC circuit has a peak current of 4 A with a frequency of 23 kHz. if the resistance of the circuit is 60 kohm, the capacitance of the circuit is 16 uF, and the unductance of the circuit is 24 uH, determine the average power of the circuit.
asked by fatih 
Math
A city of 2,950,000 people has a 2.5% annual decrease in population. Determine the city's population after 4 years.
asked by Julie 
Chemistry
Why are molten metal chlorides used as electrolytes rather than using other molten salts? Thanks for ur helps alot.
asked by Chemo 
physics
On a wet racetrack, the maximum safe speed, to avoid sliding on a level circular curve with a radius of curvature of 56 m, is 73 km/hr. What is the coefficient of friction between the car's tires and the track surface?
asked by jeff 
physics
for an RLC circuit with a resistance of 11 k*ohm, a capacitance of 2 uF, and an inductance of 24 H, what frequency is needed to minimize the impedance?
asked by fatih 
AP Chemistry
A buffer, consisting of H2PO4− and HPO42−, helps control the pH of physiological fluids. Many carbonated soft drinks also use this buffer system. What is the pH of a soft drink in which the major buffer ingredients are 7.20 g of NaH2PO4 and 4.90 g of
asked by HELP PLEASE 
Science
Describe a hybrid plasmid. What is this?
asked by Justin 
Math
Prove the theorem that if limx¡úd h(x)= P and limx¡úd k(x) = Q and h(x) ¡Ý k(x) for all x in an open interval containing d, then P ¡Ý Q by using the formal definition of the limit, showing all work.
asked by Buster 
Physics
What is the maximum equipment needed to determine the power dissipated in a resistor of unknown value? 1) a voltmeter, only 2) An ammeter only, 3) a voltmeter and an ammeter only 4) a voltmeter, an ammeter, and a stopwatch
asked by Thomas 
Chemistry
Explain why electrolytic reduction rather than chemical reduction is often used to obtain active metals from their compounds.
asked by Chemo 
physics
a series RLC circuit has a peak current of 1 A with a frequency of 54 kHz. if the resistance of the circuit is 51 kHz, the capacitance of the circuit is 19 uF and the inductance of the circuit is 25 uF, determine the average power of the circuit.
asked by fatih 
statistics
in an effort to increase production of an automobile part, the factory manager decides to play music in the manufacturing area. Eight workers are selected, and the number if items each produced for a specfic day is recored. After one week of music, the
asked by western international university 
chemistry
For the ionization of phenylacetic acid, Hc8H7O2 +H20 C8H7O2 (aq) + H3o+ (aq) Ka + 4.9x10^5 What is the concentration of the phenylacetic ion, C8H702, in 0.186 M phenylacetic acid, HC8H702?
asked by anonymous 
Science
Why does water have more surface tension than methylated spirits?
asked by Mee 
biology
how can nanobots be used to fight the common cold?
asked by kally 
Science
Two thin strings supported a 200g metre ruler 20cm and 30cm from both ends. Calculate the tension in each string.
asked by Constance shapela 
biology
briefly describe the basic characteristics that all living things on earth have in common
asked by Abigayle 
chemistry
Using this data, 2 NO(g) + Cl2(g) == 2 NOCl(g) Kc = 3.20 X 103 NO2(g) == NO(g) + ½ O2(g) Kc = 3.93 calculate a value for Kc for the reaction, NOCl (g) + ½ O2 (g) == NO2 (g) + ½ Cl2 (g) A. 20.2 B. 2.06 X 104 C. 4.49 D. 4.84 X 103 E. 0.223 eliminated
asked by bob 
maths
Suppose scores on an IQ test are normally distributed.If the test has mean of 100 and standard deviation of 10,what is the probability that a person who takes the test will score between 90 and 110?
asked by boby 
Physics
HELP! A tennis ball is attached to a .8m long string whirled around in a circle with a constant frequency of 1.2 Hz. What is the linear(tangential) velocity of the tennis ball?
asked by Phil 
calculas
Consider a cooling cup of coffee whose initial temperature is 205°. The room temperature is held at 70°. Suppose k = 1/16. Let y be the temperature, and y' its time derivative.  I have the differential equation: y' =
asked by pasta! 
Government
The most powerful position in the White House Office is usually the _____. 1.)chief of staff 2.)press secretary 3.)White House counsel My answer4.)attorney general
asked by Paige 
physic
How far (in meters) above the earth's surface will the acceleration of gravity be 27.0 % of what it is on the surface?
asked by coleman 
Chemistry
h2c4h4o4 + 2naoh > 2h2o + na2c4h4o4 as for the previous question im sorry i forgot to plug the maleic acid in the formula properly. so this ones it ^ .2213 of c4h4o4 used (maleic acid) and .1 M NaOH 1. show the equation for 1st and 2nd ionization 2. find
asked by Ruby 
english (from language to litrature)
give examples of of litrary and nonlirary prose by citing examples from any source of your choise in 350 words (you may qoute the source
asked by dharmendra 
Calculus
Fnet= F1+F2+F3, F1=40N with bearing of 90' , F2=25N with bearing of 30' ,and F3= 12N with bearing of 290' what is the magnitude and direction ....using VECTOR COMPONENTS....
asked by Tarkan 
math
Compare the numbers. Write >,
asked by Gabby ( 5 grade) 
CALCULUS PLEASE HELP!
If f(x)=1.7x^55.3x^2+9.8 and if r is the only real number such that f(r)=0, then r is between a. 1.4 and 1.3 b. 1.3 and 1.2 c. 1.2 and 1.1 d. 1.1 and 0 e. 1.0 and 0.9
asked by Anonymous 
math
A two digit number is such that two times the tens digit is three less than thrice the units digit and four times the number is 99 greater than the number obtained by reversing the digits. Find the number.
asked by lekan 
Physics
A 1100kg car is being driven up a 4.0° hill. The frictional force is directed opposite to the motion of the car and has a magnitude of f = 518 N. A force is applied to the car by the road and propels the car forward. In addition to these two forces, two
asked by Natasha 
Math word problem
In a pet store the number of dogs is 11 more than 3 times the number of cats. If the pet store has 21 dogs. How many cars does it have? Question 2. In the pet store the number of birds is 10 less than twice the number of rabbits. If the pet store. Had 56.
asked by Marko 
physics
a series RLC circuit has a peak current of 4 A with a frequency of 23 kHz. if the resistance of the circuit is 60 kohm, the capacitance of the circuit is 16 uF, and the unductance of the circuit is 24 uH, determine the average power of the circuit. Include
asked by fatih 
trig
solve the equation 2 tan C3=3 tan X4 algebraically for all values of C in the interval odegrees lessthan or equal C lessthan360 degrees.
asked by Anonymous 
English 1
1.Writers often communicate their themes by building clues into the story. Choose one story from Collection 4 and show how the author uses characterization, title choice, and key passages to develop the theme of the story. Use examples from the story,
asked by Ella 
TrigAlgebra help asap
A regular pentagon is inscribed in a circle whose radius measures 7 cm. Find the area of the pentagon.
asked by Missy 
physics
Two identical planets, each of mass M, have their centers a distance D apart. Halfway between them, at gravitational equilibrium, lies a satellite of mass m. The satellite is then displaced a small distance and released, after which it undergoes SHM. a) In
asked by sand 
math
The length of time that it takes for a pendulum to make one complete swing depends on the length of the pendulum. The time in seconds, T, is related to the length in metres, L, through the equation T=2π√ L/9.8 Write this equation in function notation.
asked by james 
math
A farmer is planting a row of corn. Each plant is 3 feet apart. If he is planting 23 how far apart is the first and last plant?
asked by Anonymous 
physics
a series RLC circuit has a peak current of 4 A with a frequency of 23 kHz. if the resistance of the circuit is 60 kohm, the capacitance of the circuit is 16 uF, and the unductance of the circuit is 24 uH, determine the average power of the circuit. Include
asked by fatih 
Chemistry
The explosive residue contains carbon, hydrogen and nitrogen where the percentage of nitrogen is high, calculate it from 0.5g of residue which eliminates ammonia gas on reaction with sodium hydroxide, and absorb by 50mL of Nby10 H2SO4. Unused acid is
asked by Farah 
Calculus
Fnet= F1+F2+F3, F1=40N with bearing of 90' , F2=25N with bearing of 30' ,and F3= 12N with bearing of 290' what is the magnitude and direction ....using VECTOR COMPONENTS....
asked by Tarkan 
chemistry
The urine excreted by an adult patient over 24 hours was collected and diluted to give 2.000L sample. at ph 10 EDTA FORMS 1:1 COMPLEX WITH BOTH Mg2+ and Ca2+ and after buffering at this pH a 10mL aliquot of the sample required 26.81mL of 0.003474M EDTA for
asked by TOM 
Chemistry
What are the abbreviation representation for scientific calories, food calories and SI units of energy?
asked by CeliaWalker 
physics
. Compared a car (mass of 2000 kg) moving at 10 miles per hour, how much kinetic energy (in Joules) does that same car have when it moves at 20 miles per hour? At 50 miles per hour? 75 miles per hour?
asked by Hector 
chem
CF4 how would you determine the molecular shape using vsepr? i got that it has 32 electrons and four bonds. im stuck on how to get the non bonding domains and shape and bond angle! thanks!
asked by skye 
basic math
In one class, there are 15 boys and 30 girls. Approximately what percentage of the students in the class are boys?
asked by strawberry caca 
Accounting
Identify internal control principles. (SO 2), C The internal control procedures in Phillips Company make the following provisions. Identify the principles of internal control that are being followed in each case. a. Employees who have physical custody of
asked by Jaymes 
algebra
algebraic expression for onefourth of the sum of a number and five
asked by Anonymous 
TrigAlgebra help asap
A regular octagon is inscribed in a circle with a radius of 5 cm. Find the area of the octagon.
asked by Missy 
World geography
Imagine you are a farmer in an area that has monsoons. What would you need to do to adjust your crops or your farming techniques to account for this massive rainfall? How can you protect your crops during the dry winter months?
asked by Pam 
physics
The drawing shows a copper wire (negligible resistance) bentinto a circular shape with a radius of 0.48 m. The radial sectionBC is fixed in place, while the copper bar ACsweeps around at an angular speed of 16 rad/s. The bar makeselectrical contact with
asked by Daniel 
Math 12A
A rectangular building is to be built on a lot measuring 46m by 30m. The building will be surrounded by a strip of lawn of uniform width. if the lawn takes up 30% of the lot, how wide will the lawn be? Need you help
asked by I 
MATH
Word problem mark and melinda collect baseball caps. mark has 7 more than melinda. togheter they have 115 caps. how many baseball caps does each of them have? i got: melinda has 54 mark has 61 is that right? i have 2 more i cant figure out: 1) in a pet
asked by marko 
geometry
how many 8' tiles are needed to tile a 8' by 18' floor? how much money will it cost if tiles are $2.75 each?
asked by Khalia 
statistics
The Sledge Tire and Rubber Company plans to warranty its new mountain bike tire for 12 months. However, before it does this, the company wants to be sure that the mean lifetime of the tires is at least 18 months under normal operations. It will put the
asked by nouah 
physics
John Johnson set a world record for the "100.0" m run with a time of 9.86 s. If, after crossing the finish line, John walked directly back to his starting point in 90.9 s, what is the magnitude of his average velocity for the 200.0m?
asked by rachel 
chemistry
Using this data, 2 NO(g) + Cl2(g) == 2 NOCl(g) Kc = 3.20 X 103 NO2(g) == NO(g) + ½ O2(g) Kc = 3.93 calculate a value for Kc for the reaction, NOCl (g) + ½ O2 (g) == NO2 (g) + ½ Cl2 (g) A. 20.2 B. 2.06 X 104 C. 4.49 D. 4.84 X 103 E. 0.223 eliminated
asked by bob 
statistics
if the mean of a test score is 30 and the standard deviation is 3.7. which score could be expected to occur the least often?
asked by Anonymous 
math
Relationship 1: Relationship 2: y = x a) Identify each relationship as direct or inverse variation. b) Calculate the constant of each relationship and explain how you arrived at your answer. c) Using complete sentences, explain how the two relationships
asked by Lorna 
Math
In which one of the following sentences is the number written correctly? A. Onehundred and thirtytwo people lined up to buy the tickets B. John just paid $33 thousand for his new car C. The parcel of land was advetised a two hundred fortythree and three
asked by Brenna 
physics
A child moves with a speed of 5.40 m/s when positioned 14.0 m from the center of a merrygoround. Calculate the net force (in newtons) exerted on the child, whose mass is 26.0 kg.
asked by bob 
4th grade math
what is 5/6 of 288
asked by zoe 
Math
If a food item weighs 120 grams and its composed of 77 grams of carbhydrates, 19 grams of fat, and 24 grams of protein, what is its total calorie count? Carbs and protein each provide each provide 4 calories per gram and fats provide 9. Thanks for all who
asked by Dee 
chemistry
Using this data, 2 NO(g) + Cl2(g) == 2 NOCl(g) Kc = 3.20 X 103 NO2(g) == NO(g) + ½ O2(g) Kc = 3.93 calculate a value for Kc for the reaction, NOCl (g) + ½ O2 (g) == NO2 (g) + ½ Cl2 (g) A. 20.2 B. 2.06 X 104 C. 4.49 D. 4.84 X 103 E. 0.223 eliminated
asked by bob 
Math
A sweater. Cost. $12 more than a shirt. Together they cost. $46. What was the price of the shirt? I Got. : shirt was $17. Is that right? The perimeter. Of a rectangle. Is 84cm The length is twice the width. Find the length and width. I got. Length 24cm
asked by Marko 
math
kanye spelled 23 out of 25 words correctly on this test. write the percent of words he spelled correctly as a percent, a fraction, and a decimal.
asked by chANEL Joseph 
physics
a student driving a car travels 10.0 km in 30,0 min.What was her average speed?
asked by tema 
Calculus
Fnet= F1+F2+F3, F1=40N with bearing of 90' , F2=25N with bearing of 30' ,and F3= 12N with bearing of 290' what is the magnitude and direction ....using VECTOR COMPONENTS....
asked by Tarkan 
anatomy
I have 2 problems/questions I am unsure of the answers. The first one is "how would you demonstrate the Valsalve maneuver using the model lung?" and 2. If a woman is breathing rapidly and deeply after exercise, would TLC, RV, TV, IRV, and ERV stay the
asked by Mary 
math word problems
lydi sold 4/5 of her candles to raise money for the band. she has 8 candles left. how many candles did lydia start with? a coin purse contains quarters, dimes, and nickes. there are the same number of dimes as nickesl and half as many quarters as dimes.
asked by marko 
ACC 290
How would I record the following transactions into a "T" account? This information relates to Pickert Real Estate Agency. Oct. 1 Stockholders invest $30,000 in exchange for common stock of the corporation. 2 Hires an administrative assistant at an annual
asked by Ashley 
Maths
The first term of the geometric sequance is 27,the last term is 8 and the sum of the series is 65.how many terms are there in the series?
asked by Naledi obotseng 
chemistry
If 75.0 grams of water is decomposed into hydrogen and oxygen, how many grams of oxygen should be formed?
asked by Anonymous 
TrigAlgebra help asap
A rhombus has sides of 5 cm and one diagonal is 6 cm long. Find the area of the rhombus.
asked by Missy 
Chemistry
A student has 100.0 mL of an unknown solution of Vitamin C. She removes 1.00 mL of this solution, dilutes it to 50.0 mL, and titrates this second solution with an iodine solution solution that 8.5x1^4 M. 6.60 mL of iodine solution is required to reach the
asked by Cassandra 
Chemistry
A student has 100.0 mL of an unknown solution of Vitamin C. She removes 1.00 mL of this solution, dilutes it to 50.0 mL, and titrates this second solution with an iodine solution solution that 8.5x1^4 M. 6.60 mL of iodine solution is required to reach the
asked by Cassandra 
Government
Which is not a subunit of the Department of Health and Human Services? 1.)The Food and Drug Administration My answer2.)The Bureau of Indian Affairs 3.)The National Institutes of Health 4.)The Centers for Disease Control
asked by Paige 
physics
John Johnson set a world record for the "100.0" m run with a time of 9.86 s. If, after crossing the finish line, John walked directly back to his starting point in 90.9 s, what is the magnitude of his average velocity for the 200.0m?
asked by rachel 
statistics
Fit a regression line = a+bXi by the method of Least squares to the given sample information. Observations 1 2 3 4 5 6 7 8 9 10 Income (X)(’00 Rs) Consumption Expenditure(Y)(’00 Rs) 10 44 5 60 25 39 37 51 96 80 94 70 110 80 30 30 79 50 65 40
asked by Anonymous 
chemisty
how do you convert 50 microliters of 2 butanol to moles?
asked by jessica 
geometry
how many 8' tiles are needed to tile a 8' by 18' floor? how much money will it cost if tiles are $2.75 each?
asked by Khalia 
chemistry
A gas is heated from 256 K to 287 K while its volume is increased from 20.0 L to 30.0 L by moving a large piston within a cylinder. If the original pressure was 1.16 atm, what would be the final pressure?
asked by jamella 
Math
If 5 times a number is increased by 5, the result is 30. find the number.
asked by Anthony 
math
After school, Chase spends 20 min reading, 30 min practicing the piano, 15 min cleaning his room, and 40 min doing his homework. Chase is busy for 105 min.What fraction of the time does he spends cleaning his room?
asked by Sam 
physics
An ion enters a mass spectrometer which has a .18 T field perpendicular to? an electric field of 1.6 kV/m and selects a velocity. the same magnetic field is then used to deflect the singly charged ion into a circular path of radius 12.5 cm. a. what
asked by fatih 
Math
Ok so I have this word problem that I can't figure out. Help please!! Sandra is trying to use her old cell phone to call her best friend. She can be no more than 3 miles from a tower in order to get a signal for her phone. If the telephone tower is 252
asked by Emma 
physics
the current to an LC circuit is being supplied according to the function I(t)=2*sin(7t). what is the smallest value of t for which the inductor and capacitor each contain half of the energy?
asked by fatih 
chemistry
If 75.0 grams of water is decomposed into hydrogen and oxygen, how many grams of hydrogen should be formed?
asked by stoi. 
chemistry
The decomposition of water described in question 1 was performed. In this experiment 20.0 grams of oxygen was produced. What is the percent yield?
asked by stoi. 
4th grade math
what is 5/6 of 288
asked by zoe 
English 1 Literature
I understand what the question is asking for but I do not know exactly how to write it. Here is the question. The way a story is told and the voice that tells it are important parts of a story. Choose at least two stories from Collection 3. Analyze the
asked by Ella 
math
Mr. Tip is working on the marching band's halftime show. During the first song, rows have 9 musicians each. During the second song, rows change to contain 6 musicians each. If there are a total of 252 musicians in the marching band, how many rows will
asked by Anonymous 
Math
x^36x^2+17x Find the point of inflection of the graph of the function? x,y ( , ) I tried to solve for it by getting the 1st derivative and setting it equal to 0 but i get sqrt,so am confused!
asked by Angelina 
Chemistry
A student has 100.0 mL of an unknown solution of Vitamin C. She removes 1.00 mL of this solution, dilutes it to 50.0 mL, and titrates this second solution with an iodine solution that is 8.5 × 104 M. 6.60 mL of iodine solution is required to reach the
asked by Shelley 
Chemistry help PLEASE!!
For a solution that is 0.168 M NH3 and 0.104 M NH4Cl calculate the following.? [OH] [NH4+] [Cl] [H3O+] How would you do this :/
asked by Anonymous 
Health/ Math
A healthy amount of body for young men is 8 to 20 percent of body weight. Calculate the range of body fat, in pounds, for a young man who weighs 150 pounds and for a young man who weighs 185 pounds.
asked by Dee 
English
Please help me begin a story with these words. 1.exemplary (adj) outstanding, an example to others 2.extenuating (adj) excusing, lessening the seriousness of guilt or crime, e.g., of mitigating factors 3.florid (adj) redcolored, flushed; gaudy,
asked by Leslie 
math geometry
if a figure has five equilateral triangles and one pentagon, and the pentagon is 90 cm, what is the perimeter of the whole figure
asked by chandan 
algebra
A rectangular hole 2 centimeters wide and x centimeters long is cut in a rectangular sheet of metal 5 centimeters wide and y centimeters long.
asked by Anonymous 
math
A cube of side length of 11cm and a mass of 2000g has what density?
asked by cat 
math
is 2x  5 = 5 = 7x = 3 a linear equation
asked by mary 
3 grade english ms sue
PREFIXES prepaid,midnight,overflow,outdoors,outline,overgrown,perfix,midwest,pretest,midpoint,outgoing,overtime,overdue,outside,outfield context clues  sue made a list of phrases about her best friend. write a list word to complete each phrase. 1
asked by dw 
Physics
Lake Erie contains about 4.8 x 10^17 grams of fresh water. Assume that the lake has frozen solid and that the ice starts off at 3 C. How much energy would the lake need to absorb from the Sun to cause it to evaporate completely? Each gram of water will
asked by Tracy 
Physics
What is the magnitude of buoyant froce acting on a 720 cm^3 toy submarine foating in fresh water? (d water=1 g/cm^3)
asked by Tracy 
math
A locker combination has three nonzero digits, and digits cannot be repeated. If the first digit is odd, what is the probability that the second digit is even?
asked by anonymus 
geometry
If a car requires 10 Liters of gas to drive 100 kilometers, how many gallons would be required to drive one mile?
asked by Khalia 
physics
A space probe is traveling in outer space with a momentum that has a magnitude of 7.5e7 Kg*m/s. A retrorocket is fired to slow down the probe. It applies a force to the probe that has a magnitude of 2.0e6N and a direction opposite to the probe's motion. It
asked by Natasha 
Physics
Lake Erie contains about 4.8 x 10^17 grams of fresh water. Assume that the lake has frozen solid and that the ice starts off at 3 C. How much energy would the lake need to absorb from the Sun to cause it to evaporate completely? Each gram of water will
asked by Tracy 
Math 7th Grade
A car cost $65 per day to rent plus $.35 per mile. Joe rents car for 1 day and drives 115 miles. what is the equation and the solution. The solution is pretty simple $65 + .35x115 = 105.25 I can't figure out the equation.
asked by Chris 
1st grade same sound
which one of the 3 words has the same sound as boat? sol slow do
asked by Mary 
Chemistry
So I thought i finally had figured out how to balance these equations but now this one with the formula in it has confused me again. Can you help with the next steps in balancing this equation? Maybe if I can get the answer to this one I can complete my
asked by Susan 
Math
Say that a bag contains 100 marbles: 30 red, 30 blue, 30 green, plus a mix of 10 yellow and orange marbles. To be certain that you have 10 marbles of the same color, what is the minimum number you would need to remove (without looking) from the bag?
asked by Cyndie 
SpanishPlase check
I had to make some negative sentences. Please check Thank you No tengo nada que hacer. No bebo nunca el batido. No bailo nunca. No hablo nunca francés. Tampoco hablo el alemán No compro ninguno. No quiero comer nada No quiero nunca contestar en la clase.
asked by Tiffany 
principle of management
Fernando, a manager in a retail store, is changing the work schedule of his longterm employees for the holiday season. He is using the same basic schedule as he did last year. Fernando should expect that his employees will be: A) terribly upset and quit
asked by vedrana 
Statistics
Quick question, can an obtained value be negative?
asked by Mm 
math
the museum charges $20 dollars for two people. and 28 for three people what is the equation that realtes the number of people in a group and the cost to enter a museum? write it in slope intercept form
asked by bogalusa high 
Algebra II
Please help me solve this rational function, my teacher did not give us notes and the book is confusing me :/ Thank You! y/5+y/2=7
asked by Gaby 
calc
f(x)=[5x^34x^28x+9]/[2x^21x3] Find the equation of the nonvertical asymptote. y = Does f(x) intersect its nonvertical asymptote? (yes or no) What is the smallest value of x at which f(x) intersects its nonvertical asymptote? ( Enter No in the
asked by jasmineT 
calc
f(x)=[5x^34x^28x+9]/[2x^21x3] Find the equation of the nonvertical asymptote. y = Does f(x) intersect its nonvertical asymptote? (yes or no) What is the smallest value of x at which f(x) intersects its nonvertical asymptote? ( Enter No in the
asked by jasmineT 
physics
A simple pendulum has a mass m and carries a charge q. The pendulum is suspended between the vertical plates of a capacitor of separation distance d. If the string of the pendulum makes an angle θ with the vertical, what is the potential difference
asked by David 
Sciece
Drought, flood and/or bushfire effects on the Red Wattle bird. Please help this part is in my assignment and its due tomorow!
asked by Jackson 
Political Science
Based on Bryan Caplan's book, The Myth of the Rational Voter: Offer your own opinion, and critical analysis, to Caplan’s argument about “rational irrationality.” What are the implications about Caplan’s story for American democracy? Do you agree
asked by Kevin 
english ( need proofread)
1. I learned that soil take crucial role in growing plants. If the soil is healthy, any plant will grew well on that soil. The plant will have a better quality, better flavor, and better nutritional values. 2. People buy food that is cheap and convenient.
asked by ESLstudent 
CRJ 201
Jacobson v. United States case regarding entrapment. Need some veiws opinion towards the outcome of this case.
asked by Anonymous 
math
Adrian said that any 2 digit number with 2 identical,digits is divisible by 11. Do you agree? Explain.
asked by Ray 
English
Ms Sue, can you please check these two sentences, I need to include in an email? Thank you. 1) Sorry, for disturbing you. We have received email (emails) from four of your students, namely ..... 2) Could you please let me have your list of students before
asked by Henry 
Chemistry
The final temperature of a material was 315K and delta T was 15 degrees. What the initial temperature be if the material is being cooled... and also initial temperature if the material is being heat? Please and Thank you.
asked by CeliaWalker 
chem
what mass of nitrogen can be obtained from a 400.0g sample of potassium nitrate?
asked by kalina 
Physics
A cylinder contains 0.1 cubic meters of gas at atmospheric pressure. This gas is allowed to expand until its pressure drops to 7800 Pa. What is the gas volume after this expansion has taken place? Is this answer right: 7800/10130 = 0.770
asked by Tracy 
chemistry
how can you find the amount of moles of 50 microliters of 18M H2SO4?
asked by coleman 
Math
imaginary numbers Find the reciprocal of 27i and express it in terms of a+bi I need help please and thank you
asked by Anonymous 
Science
What is the total braking distance for a car that is going 60km/h on wet road (0.10)? The drivers reaction time is 1.5 seconds.
asked by Alyssa 
Algebra
In 2004, about 233 million people in the US were aged 14 or older. They consumed, on average, 2.23 gallons of alcohol per person. Use scientific notation to estimate the total number of gallons of alcohol consumed by this age group. What is the formula for
asked by Anonymous 
math
on a plan of a rectangular garden the length is 12cm and the width is 9cm. the actual length of the garden is 8 yards. what is the actual width?
asked by kourtney 
Chemistry
Hi, I am trying to figure out how to calculate the average temperature of 2 different chemical solutions based upon the temperatures I measured. The question states: Find the average Ti of HCl & NaOH solutions. The Ti of NaOH solution is: 20.87 C The Ti of
asked by Jules 
Hostory / Social Studies
How Was Big Business Affected By War Mobilization ?
asked by Remy 
Calculus (Intermediate Value Theorem)
If f(x)= x^3x+3 and if c is the only real number such that f(c)=0, then c is between ______?
asked by Student 
Chemistry
Kp=1.6 Kp=1.0*10^4 A2B Find the equilibrium partial pressures of A and B B=1.0 atm A=0.0 atm This is what I have so far A 2B 0 1.0 +p p p 1p [B]^2/A (1p)^2/p = 1.6 then got a quadratic equation of p^2+1.6p1 to get x=.48
asked by maura 
math
I need numbers flashcards from 13 to 61
asked by Anonymous 
Math
6ab + 4bc  3bc + bc
asked by Nick 
Life oriention
Name and explain 3 checks and balances that are in place in SOUTH AFRICA that control and regulate media
asked by Harrison 
physics
What is the maximum speed (in meters/second) with which a 1300 kg car can round a turn of radius 700 m on a flat road, if the coefficent of friction between tires and road is 0.530
asked by jessica 
math
if a business borrows $16,000 and repays $25,800 in 5 years, what is the simple interest rate
asked by Anonymous 
chemistry
If 20.0 grams of hydrogen and 40.0 grams of nitrigen are combined to form nitrogen trihidride, how many grams of nitrogen trihydride should be formed?
asked by stoi. 
Math
Write an inequality for the expression fourteen more than a number is at least 9. a. f+14†9 b. 14f†9 c. f+9†14 d. f14†9
asked by Jon 
Algebra
A model scale of an addition shows 12cm wide base and rises to 15cm. Actual base will be 120 ft. What will the height of the addition be?
asked by Jus 
science
Are the following substances acid, base, or neutral: sodium bicarbonate (pH = 8.3): Blood (pH = 7.4): milk (pH =6.7): orange juice (pH = 3.6): milk of magnesia (pH = 10.5): How do you come up with the answers?
asked by long 
Science
Drought, flood and/or bushfire effects on the Red Wattle bird. Please help this part is in my assignment and its due tomorow!
asked by Jackson 
math
there are 5 green, 3 red ,8 yellow, and 3 black marbles in a box. How many marbles does John need to draw before he is absolutely sure he has at least one red marble?
asked by dinah 
math
a piano has 88 keys.show with numbers the probability of hitting a particular key if you shut your eyes and strike a key.
asked by gabriel 
stats
three cards are drawn from a deckof playing cards.Find the probability that the firstcard is red,the second cardis a black king,and the third card is a black king.
asked by crystal 
pre algabra
mark is making a scale drawing of his house.the width of his house is 40 feet.marks room is 10 feet wide by 17 and a half feet long in mark first drawing the width of his house (40feet) is represented by 8 inches what would the dimensions of his room in
asked by Anonymous 
Math
Solve: (don't forget about imaginary numbers) 5x^27x+12=0 how do I solve this? please help and thank you
asked by Anonymous 
Physics
two 10.0L buckets of hot water at 65 degrees celsius are mixed with one 10.0L bucket of cold water at 18 degrees celsius. calcualte the final equilibrium temperature after mixing, assuming no thermal energy loss to the environment.
asked by Parsa 
calculus
The efficiency of an internal combustion engine is given by E= (1v/V)^0.4 Where V and v are the respective maximum and minimum volumes of air in each cylinder. a) Show that ∂E/ ∂V > 0 and interpret your result b) Show that ∂E/ ∂v < 0 and interpret
asked by wei 
math
three(3) cards are drawn from a deck of playing cards.find the probability that the first card is red,the second card is a black king,and the third card is a black king
asked by crystal 
trig
verify the identity algebraically (55 cos x)(5+5 cos x)=25 (sin^x)
asked by cam 
biology
what are the advantages for using nanotechnology?
asked by kally 
science
do your results support idea that trophic cascades occur in nature?
asked by gloria 
math
THE EXPRESSION:553.7X+27,966 CAN BE USED TO APPROXIMATE THE AVERAGE ANNUAL SALARY IN DOLLARS OF PUBLIC SCHOOL TEACHER IN THE YEAR 1985+X 1. WHAT WAS THE AVERAGE TEACHERS SALARY IN DOLLARS OF PUBLIC SCHOOL TEACHER IN 1993? 2. IN WHICH YEAR WILL THE AVERAGE
asked by KEKE 
Math
Simplify 9^2 Negative nine squared
asked by Anthony 
trig
5sin(2x)+4cos(x)=0
asked by john 
Physics
A spring and block is set up on frictionless tabletop. The 30N/m spring is compressed 16 centimeters and released. What is the maximum speed the 2.0 kilogram block will reach?
asked by Tracy 
English
I urgenlty need to know which alternatives are possible. I know the first is correct. Thank you. 1) The doctor put a cast on my ankle/ The doctor casted my anke. I had to keep/have/ a cast for a month. 2) Why don't you take some bicarb to help your
asked by Henry 
geometry
Liza used a cardboard cube as part of an art project. The cube has a volume of 729 square inches. Which cube might she use. one with 4inches in length, 9 inches, 10 inches, or 7 inches
asked by max 
English ms. sue
ms. sue i do characterization on narrator, i not get what be physical traits that be how she look like? cause they have to be different from personality traits.
asked by Mohammad 
science
based on your knowledge of environmentalscience, what could explainthese observation? Support your answer with specific results from your data and ideas fromyour readings
asked by gloria 
math
first estimate answer then find exact answer simplify if possible 9 1/5*30
asked by Anonymous 
Math
find the value of the expression. 3x45/92(106)4/2
asked by Anthony 
math
Having difficulty with the four frequency ,to use in a table and determine and find the range ..im not understanding whays needed ?
asked by david 
physics
an LC circuit with a 3 uF capacitor and a 3 H inductor has a current I(t)=10*sin(2t) supplied to it . after 2 s, how much charge is stored on a plate of the capacitor?
asked by fatih 
english
i need proof reading with my work if i did any mistake. thanks 1. I learned that soil take crucial role in growing plants. If the soil is healthy, any plant will grew well on that soil. The plant will have a better quality, better flavor, and better
asked by ESLstudent 
math
Solve: (don't forget about imaginary numbers) 5x^27x+12=0 how do I solve this? do I need to use the quadratic formula? please help and thank you
asked by Anonymous 
English
how i describe 19th century? really olden days?
asked by Mohammad 
EARLY CHILDHOOD
which of the following is an example of a closed skill a striking a stationary ball,catching a butterfly , hitting a pitched ball ,playing tag
asked by tascha 
math
Why f(x) and g(x) do not cut the xaxis at the same number of points?
asked by Violentine 
English
I'm pleased you can help me this week, too, Writeacher. Just a few things. 1) I've just had a parentteacher meeting today. Some of my new students, whose grammar is very, very low and study very little complained about their bad marks in English. They are
asked by Henry 
math
If $570 is invested in an account that earns 12.75%, copounded annually, what will the account balance be after 11 years?( round to the neearest cent)
asked by Anonymous 
geometry
How can I tell the fraction and angle measure of each turn in rotational symmetry?
asked by Britney 
Astronomy
you are 100,000 feet above planet B and the ground range to your horizon point is 400 miles. What is the radius of planet B?
asked by Anonymous 
physics
What is the power delivered by a motor lifting an elevator weighing 1250kg up 89 floors at 16.8 meters per second
asked by Kaye 
math
if the area of a rectangle is 27 square inches and one side is 3 inches how many square inches is the other side
asked by han 
algebra
triangle 1 is 6,16,32 triangle 2 is 9,24 h they are similar how do i find h?
asked by becca 
Alg2
How how I write the first six terms of this sequence? Please be detailed and thanks in advance :) f(n)= 3/m
asked by Lily 
calculus
evaluate the ∫from square root of 2 to 2 1/x^3square root of x^21 dx 1/24(6+3 square root of 3 + pi) but i got something different
asked by will 
Hamlet
Pretend you are the artistic advisor to the director of a production of Hamlet. Write a short (about 400500 word) memo in which you provide your recommendation as to how these two scenes shold be enacted in regard to this controversy. Explain your
asked by Scarlet 
To Celest A
how do I figure out how to get your posts? Again room210
asked by Vanessa 
physics
A 2kg box,initially at rest,is pulled along the ground by a force of 15N acting along the plane of the ground.A constant frictional force of 3N acts on the box during this motion.The box is displace 10m. Then calculate work done on the box?
asked by Phumelela 
principle of management
10. An announcement of the companysponsored picnic travels from the employeesâ€™ social committee to the other employees through email. This communication is ______ and ________. a. Horizontal; informal b. External; informal c. Vertical; informal d.
asked by vedrana 
Math
How many pounds are in 3T and 900 pounds?
asked by Olivia 
trig
cos x/1+sin x + 1+sin x/ cos x= 2sec x
asked by val 
English
1. My nickname is "Captain Cook." 2. My nickname is "Beyonce." (Why do we have to put 'quoation marks as in the sentences above? Can we use the sentences without the quotation marks? What is the role of the quotation marks?)
asked by rfvv 
social studies
i need help with 007689,007690,007691,007692,007693... can anyone help me??????
asked by kimberly 
Math
I am looking for rebus words for math vocabulary. Does anyone have any ideas?
asked by Jean 
MsSue Please
I'm the guy doing the persuasive speak on the Oil leakage in the Kalamazoo river. I can see you're from/know of this area. Can you give me some pointers/idea's of what I could talk about/include in my persuasive speech. I've been doing a little reading of
asked by Help 
science
what do recommend to Pinchot as " a sustainable " level of fragmentation that conserves the forest's biodiversity and ecosystem services while still allowing for some development?
asked by gloria 
English
I forgot to include these other sentences. Thank you 1) Which of the work environments (places) showed at page .... do you think are most suitable to motive staff? 2) I would prefer to work in a firm equipped with a canteen so that I won't have to go back
asked by Henry 
math
Water is leaking out of an inverted conical tank at a rate of 700.0 cubic centimeters per min at the same time that water is being pumped into the tank at a constant rate. The tank has height 10.0 meters and the diameter at the top is 3.5 meters. If the
asked by Justine 
Math word problem
lydi sold 4/5 of her candles to raise money for the band. she has 8 candles left. how many candles did lydia start with? a coin purse contains quarters, dimes, and nickes. there are the same number of dimes as nickesl and half as many quarters as dimes.
asked by marko 
Math
If you had 4 blue blocks in a bag, how many red blocks would you have to put in to pull out the red ones 1/2 of the time
asked by Abby 
Math
y=25 Please help me is it linear and help graph it.
asked by Haylie 
math
2.0*10^19 = x(3x)^3 solve for x and show working
asked by JIM 
organisation of commerce
how to distingwish between advertising and publicity
asked by chetna 
Alg. 2
3x2/12  1/6 = 1/6 Please help me to solve.
asked by Jason 
math
I need numbers flashcards from 13 to 61
asked by rasha 
math
A seismograph 300km from the epicenter of an earthquake recorded a maximum amplitude of 5.8*10^2lrm, find this earthquake's magnitude on the RicHTER scale to the nearest tenth.
asked by sue 
math
If $570 is invested in an account that earns 12.75%, copounded annually, what will the account balance be after 11 years?( round to the neearest cent)
asked by Anonymous 
Math
Multiply and Simplify: (a^xa^(x))^3 =(a^xa^(x))(a^xa^(x))(a^xa^(x)) =(a^xa^(x))(a^2xa^0a^0+a^(2x)) =(a^xa^(x))(a^2x2+a^(2x)) =a^3x2a^x+a^(x)a^x+2a^(x)a^(3x) =a^3x3a^x+3a^(x)a^(3x) =??? Can you simplify down any further? please
asked by Anonymous 
math
Solve the system x^2+y^24x+2y=20 4x +3y =5
asked by Jill 
english
What are 3 main motifs in Act III of Hamlet?
asked by Sally 
linguistics
why is there a length difference between the word "house" in 'greenhouse' and 'green house' when you say the word? I know it takes longer to say 'house' in "green house" but why does it take longer? please help me. I am so confused :(
asked by Mitch 
Calc 2
The region bounded by y= 1/(x^2+2x+5), y=0, x=0, and x=1, is revolved about the xaxis. Find the volume of the resulting solid.
asked by Mo 
Math
If c12 = 7 (as my teacher says) then divid that by x sove for x then divide that by 13 then  7
asked by Olivia 
Prealgebra
what is 36>9t and why please thank you
asked by taylor 
trig
5sin(2x)+4cos(x)+0
asked by john 
math
Find the equivalent fraction of 1/4
asked by Anonymous 
Math
(5 * 10^2) * (5.6 * 10^4)
asked by Anthony 
trig
SOlve over (2,pie) and find the general solution in radians. 2sin3x = square root of 2
asked by Leigh 
cal
Use Euler's method with step size0.4 to estimatey(2) , where y(x) is the solution of the initialvalue problem y'=4x+y^2, y(0)=1. . y(2)=
asked by carlton 
Math/conics
For each point in a set of points, its distance from (3,4) is four times it's distance from (5,2) a. Find the equation b. tell which conic section the graph will be.
asked by Mason 
Math
A bag has 4 red, 6 white, and 9 blue marbles. How many ways can 5 marbles be selected if 2 are one color, and 3 are another color?
asked by Bob 
logic
"P v Q" is best interpreted as
asked by kim 
help!
Are ways to prevent oil leakage in Kalamazoo?
asked by help 
Anthropology
Ethnographic methods are to ethnological methods as
asked by Mary