Questions Asked on
March 14, 2013

math 7
Mary had a bag that contains 9 green marbles, 7 red marbles, and 8 blue marbles. whats the prob that Mary will draw a green or red marble\
asked by rockrboiluvr 
geochemistry
Been trying to balance this equation for a while, but can't get the right answer. any help would be apperciated! CH2O (aq) + NO3  > N2 + HCO3  + CO2(g)
asked by jason 
Chemistry
48g of ice at its melting point is heated with steam at its condensation point. The final temperature of the system is 50 degree Celsius. How much steam was used to melt the ice? q=(48g)(1mol/18g)(500C)(0.97kcal/mol*C) = 129kcal Not sure where to go from
asked by Sarah L. 
word problem
juan bought 12 oranges and ate 1/4 of them carla bought 12 oranges and ate 1/3 of them . which ate more
asked by ricky 
science
Describe how you would go about making 1200mL of 0.100 Molarity HNO3 from a concentrated solution that is 12 Molarity?
asked by Nicole 
Math
Can in a Cone Find the volume of the largest can that can fit entirely under a cone with volume 900 cubic cm. 1.draw pictures of at least THREE different cases (including the endpoints if any). 2. define all variables CLEARLY (with words) and then use
asked by jonh 
PHYSICS
Example 2: a) A desk has a mass of 68.75 kilograms. If the coefficient of static friction between the desk and the floor is 1.1, what force must be used to move the desk from rest? b) Once the desk above is in motion, what force must be used to keep it
asked by Anonymous 
Chemistry
Describe how a buffer behaves. Your description should include an explanation of why the addition of NaOH to the HAc solution formed a buffer. What happens to the pH when a small quantity of a strong acid or base is added to a buffer solution? What happens
asked by Terrell 
physics
assume that a 50 kg skater on level ice has built up her speed to 30km/hr.how far will she coast before the sliding friction dissipates her energy? assume the friction coefficient is 0.01.
asked by chingtham 
life orientation
Discuss 5 way in which the human or enviromental problem impacts on the community
asked by asnath 
physics
a 70 kg astronaut is loaded so heavily that he can jump only to a height of 10 cm on earth.how far can he jump on the moon?
asked by chingtham 
Life orientation
Dxuscuss 5 way in which the human or invromental problem impact on the community
asked by Rose 
physics
from what height can a 1 kg falling object cause fracture of the skull?assume that the object is hard and the area of contact with the skull is 1 cm sq. and that the duration of the impact is 10^3 sec.rupture strength for skull is 10^8N/m^2
asked by chingtham 
mathstrignometry
The value of (secpi/7)+(sec3pi/7)+(sec5pi/7) is
asked by anoynomous 
Physics
Suppose that the light bulb in the figure is a 61.8W bulb with a resistance of 218 Ω. The magnetic field has a magnitude of 0.37 T, and the length of the rod is 0.59 m. The only resistance in the circuit is that due to the bulb. What is the shortest
asked by Elizabeth 
PHYSICS
Suppose that the magnetic field in the figure below has a magnitude of 1.1 T, the rod has a length of 0.86 m, and the hand keeps the rod moving to the right at a constant speed of 3.4 m/s. If the current in the circuit is 0.044 A, what is the average power
asked by Andrea 
Physics PLEASE HELP!
A flat circular coil with 97 turns, a radius of 4.04 102 m, and a resistance of 0.528 Ω is exposed to an external magnetic field that is directed perpendicular to the plane of the coil. The magnitude of the external magnetic field is changing at a rate
asked by Nixon 
math
Calculate without using tables or calculators log 450 and log 324 given log 2 =0.3010 and log 3 =0.4771
asked by John Makotamo 
statstics
The lengths of the eggs of a species of bird are roughly normally distributed, with a mean of 32 mm and an SD of 1.2 mm. 1.Approximately what is the 99th percentile of the lengths? Give your answer in mm but please do not enter the units. 2.Approximately
asked by ellas 
business
What are the core business activities of absa ,nedcor and anglo american listed on top of the jse csr index?
asked by Ntebo matla 
Math
Approximately 50% of the eggs have lengths in the range 32 mm plus or minus ____________ mm
asked by Shoab 
University Physics
In a twodimensional tugofwar, Alex, Betty, and Charles pull horizontally on an automobile tire at the angles shown in the overhead view of Fig. 533. The tire remains stationary in spite of the three pulls. Alex pulls withe force Fa of magnitude 220N
asked by Brandon Ochoa 
science
If the block has a mass 12.3 kg and slides a distance of 6.9 m down the inlcine, calculate the distance x the spring is compressed if the coefficient of kinetic friction between the block and the incline is 0.3 and the spring constant is 17.4 N/m. Input
asked by xolani 
Physics (Buoyancy)
A Cuboid with lenght as 6m and breadth as 3m, is floating in a lake. A man comes and sits on it and it sinks 1cm, then find the weight of the man. (Take g=10 m/s 2)
asked by Krishnam Kumawat 
precalculus
A rectangular field is to be enclosed by a fence and divided into three equal rectangular parts by two other fences. find the maximum area that can be enclosed and separated in this way with 1200m of fencing.
asked by jeremy 
English
Does this sentence need any other puncation than a period at the end. Fred said the distributor cap on my car is cracked.
asked by Bernie 
math
Find inverse of [1/(x2)]+3 and 2(x4)^2 + 5
asked by Elbert 
math
for what value of k are the roots of the quadratic equation (k+4)x*x+(k+1)x+1=0?
asked by raj 
Business Math
Oakwood plowing company purchased two new plows for the upcoming winter. Oakwood must make a single payment of 25,03 to pay for the plows. As of today he has $24,200. Asuume the Oakwood puts the money in the bank today, what rate of interest will it need
asked by Donna 
Physics
A worker drives a 0.460 kg spike into a rail tie with a 2.16 kg sledgehammer. The hammer hits the spike with a speed of 64.5 m/s. If one third of the hammer’s kinetic en ergy is converted to the internal energy of the hammer and spike, how much does the
asked by Ted 
algebra
The current I in an electrical conductor varies inversely as the resistance R of the conductor. The current is 50 amps when the resistances is 20 ohms. What is the current when the resistance is 60 ohms?
asked by Anonymous 
Physics
The amount of internal energy needed to raise the temperature of 0.26 kg of water by 0.3C is 326.5 J. How fast must a 0.26 kg baseball travel in order for its kinetic energy to equal this internal energy? Answer in units of m/s
asked by Ted 
chemistry
10g of silver nitrate solution is added to 10g sodium chloride solution? what change in mass do you except after the reaction and why?
asked by nitin jangid ,palwal 
math
Calculate the lenght of a rectangle with area 350cm and breadth 50mm.
asked by Nelly 
math
Calculate the breadth of a rectangle with lenght 120mm and area 960m
asked by Nelly 
math
Calculate the breadth of a rectangle with lenght 120mm and area 960m
asked by Nelly 
Math
Calculate the side lenght of square with area 25m
asked by Nelly 
chem
calculate the volume of dinitrogen tetrafluoride that has the same number of atoms as 10 L of argon under the same pressure ans temperature
asked by Anonymous 
Math
Calculate the area of a triangle with base equal to 18cm and height equal to 9cn
asked by Nelly 
Math
Calculate the height of a triangle with base equal to 142cm and area equal to 62,48cm
asked by Nelly 
Statistics
As reported in Runner's World magazine, the times of the finishers in the new york 10 km run are normally distrubted with a mean of 1.02 hours and a standard deviation of 9 minutes. Let X denote finishing time for the finishers. Then, A. Find the
asked by Anonymous 
stats
Opisthotrochopodus n sp. is a polychaete worm that inhabits deep sea hydrothermal vents along the MidAtlantic Ridge. According to an article by Van Dover et al. in Marine Ecology Progress Series (1999, vol 181 pp 201214), the lengths of female polychaete
asked by Anonymous 
Chemistry I
If 30.0 mL of 0.2 M nitric acid and 30.0 mL of 0.25 M solution of sodium hydroxide are mixed, what is the molarity of sodium nitrate? Assume that total volume of the solution after mixing is equal 60.0 mL.
asked by Therese 
calculus
The total number of people infected with a virus often grows like a logistic curve. Suppose that 15 people originally have the virus, and that in the early stages of the virus (with time,t , measured in weeks), the number of people infected is increasing
asked by Anonymous 
biomechanics
you are trying to lift a 10 kg dumbbell by pulling upward on it with a 108.1 N force. what wil lthe acceleration of the dumbbell be as a result of this force?
asked by Anonymous 
Physics 11th Grade "HEAT' 2
1) Emily is testing her baby's bath water and finds that is too cold,so she adds some hot water from kettle on the stove. If Emily adds 2.00 kg of water at 80.0 degree celcius to 20.0 kg of bath water at 27.0 degree celcius , what is the final temperature
asked by Isis 
math
Jack and Diane went to the movies. They each paid the same amount for an admission ticket. Together, they spent $12 on snacks. The total cost of admission and snacks for Jack and Diane was $26. How much was each admission ticket? Choose a variable. Write
asked by Cherie 
Math: Please check
A playground is shaped like a rectangle with a width 5 times its length (L). What is a simplified expression for the distance between opposite corners of the playground? A.) L square root 26 B.) 5L C.) 26L^2 D.) 6L Thanks
asked by Jim 
Electronics
Two resistors of 15ohms and 5ohms are connected in parallel.this parallel combination is connected in a series with a third resistor of 10ohms.the whole circuit is then connected across a 40 volts supply. 1.determine the resistance of the circuit. 2.the
asked by Hellen 
Physics
13. The graph at right shows the angular velocity as a function of time for the blade of a fan. The blade moves in a circular path. a. If θ = 0 rad at t = 0 s, what is the blade’s position at t = 1.5 s? b. At what time will the blade have completed 11
asked by Anonymous 
Math: Please check
Simplify: 11 square root 112 *A.) 44 square root 7 B.) 176 square root 7 C.) 27 square root 7 D.) 4 square root 7 Thank You
asked by Jim 
Derivatives
what is derivative of sin^2 (3x1)^2 ? dy/dx (sin^2 (x))= 2 sin x cos x dy/dx (3x1)^2= 6(3x1) chain rule? = 2 sin ((3x1)^2) cos ((3x1)^2) * 6(3x1) Please help. Thank you
asked by Mark 
math problems
ã7/11 rationalize the denominator and simplify
asked by tora 
stats
scores on a university examination are normally distributed with a mean of 68 and standard deviation of 9. What percetnage of students scores above 77? The answer is 16% according to the professor that is correct. But I don't understand how the professor
asked by Anonymous 
algebra
For the years 2010 to 2050, the projected percentage P of the U.S. population that will be 18 to 24 years old during year t is estimated by P= 0.025t+ 60.35. complete the table t 2010 2020 2030 2040 2050 p use the table to find the year when the
asked by tee 
Life Orientation
what,according to the Basic conditions of employment Act applies wiht regard to the contraventions that you've identified?
asked by Lerato 
Chemistry
A solution has a mass of 95.00g and a density of 2.147 g/mL. What is the volume of the solution?
asked by Alice 
PHYSICS
Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with this. All I need is a formula, please. :)Thank you! Here it is: A skier with a
asked by Anna 
calculus
A new college textbook edition typically generates most of its sales in the year of its publication. Sales drop off in subsequent years as a result of competition from the used book market. Suppose that the annual sales of a particular textbook may be
asked by bobbi33 
calculus
R(t) = −131t − 749.5 million dollars per year and the rate of change in the annual operating profit may be modeled by P(t) = 12t + 76 million dollars per year, where t is the number of years since the end of 1999. Determine the accumulated change in
asked by bobbi33 
physics
A parallel capicitor is made of two plates with cross sectional area A which are separated by a distance d (with a vacuum between the plates). The capacitor is connected to a battery until a charge Q is stored on it and a total potential difference VC is
asked by k 
Cal
Differentiate the function. f(x) = sin(x) ln(2x)
asked by Dee 
Help Ms.Sue Please
1.Find the lateral area of a cone with a radius of 7 ft. and a slant height of 13 ft. Use 3.14 for ð and round to the nearest tenth. 439.6 ft2 324.5 ft2 571.5 ft2 285.7 ft2 2.Find the surface area of a square pyramid with a base length of 24 cm and a
asked by Deliah 
CosDerivative
y= (cos^3 x) (cos 3x) I got 3 sin(3x) cos^3x  3 sin(x) cos (3x) cos^2 (x) using the product rule Is this right? Thanks.
asked by Mark 
science
A ball dropped from a height of 10m loses 40% of its energy after impact on ground. How much height will it gain after one impact?
asked by pinki 
science
A ball dropped from a height of 10m loses 40% of its energy after impact on ground. How much height will it gain after one impact?
asked by pinki 
chem 101
75.0 G tartaric acid in 1 liter is what molarity (moles/liter) mw= 150.087g/mol
asked by alain 
mathsstastics
Find the mean for the following data variable=4,6,8,10,12 freqency=4,8,14,11,13
asked by anoynomous 
Electronics
Rseries=R1+R2 =15ohms+10ohms =25ohms
asked by Hellen 
Calculus
If f(3)=−3, g(3)=9, f′(3)=1, and g′(3)=2, Find (f/(f−g))′(3).
asked by Travis 
inequality
find the solution to the following inequality 2(2x6)>x+3, then graph the solution.
asked by joe 
chemistry
In a measurment 0.1M Kmno4 is used.determine the volume of solution required to react with 0.158M Na2s2o3 required?
asked by Abhishek Bhargav 
math
NOTE: this is for advanced functions, NOT physics A 2m length of board rests with one end on the floor and the other end on a small stack of bricks. A baseball is rolled up the board and back down again in a total of 4 seconds. The farthest the baseball
asked by Elbert 
math
Determine the equation of the function that has the indicated transformation applied to it. f(x)= 3(x+1)^22 Is it 6(x+1)^22? or 9(x+1)^22?
asked by Thomson 
Chemistry
What is the molarity of nitrate ions in a solution containing 2.20 mg of Mg(NO3)2 dissolved in 7.35 L of water?
asked by Maddie 
Help Damon Ms.Sue
1.Find the surface area for a sphere with a radius of 10 feet. Round to the nearest whole number. 1,256 ft2 4,189 ft2 1,089 ft2 1,568 ft2 2.Find the volume of a sphere with a radius of 10 feet. Round to the nearest whole number. 1,257 ft3 4,187 ft3 1,089
asked by Lila 
geometry
From point Q on circle P, an arc is drawn that contains P. Find the measure of the arc AQB that is cut off.
asked by lauren 
Chemistry
Rank the following compounds in order of their solubility in water. (most soluble = 1  least soluble = 4)Note that for the same solubility rank the same (a tie). (CH3)2CHOH HOCH2CH(OH)CH2OH CH3CH2OH (CH3)3COH
asked by Maddie 
Math
Use implicit differentiation to find the slope of the tangent line to the curve y/( x + 4 y) = x^4 – 4 at the point (1,3/13)
asked by Melissa 
Math
Use implicit differentiation to find the slope of the tangent line to the curve y/( x + 4 y) = x^4 – 4 at the point (1,3/13)
asked by Melissa 
PREALGEBRA
PLEASE HELP 5x+7y=12 x=367y solve by the substitution methond
asked by FAYE 
science
According to Newton's second law of motion, _____? A. F = mv B. F = m/a C. a = Fnet /m D. F = ma I think it is B..?
asked by Roger 
Chemistry Equilibrium
Which of the following conditions is always true at equilibrium? deltaG=0, Q=1, K=1, deltaG=deltaG(standard), deltaG(standard)=0, Q=0, deltaG(standard)=1 I'm so confused, please help!
asked by Student 
Science
What was the main difference between Dalton's model of the atom and the model that was first developed by the Greeks?
asked by Kim 
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 i got an answer of 1.83x10^13 is this correct??
asked by jane 
Word ProblemCalculus
A spherical balloon is being inflated in such a way that its radius increases at a rate of 3 cm/min. If the volume of the balloon is 0 at time 0, at what rate is the volume increasing after 5 minutes? my answer is 45 cm/min. is this right. thanks
asked by Mark 
DerivativeWord Problem
Volume in liters of antifreeze remaining in a leaking radiator after t minutes is V= 20 2t 0.1t^2 a) how long does it take to drain the antifreeze mixture from the radiator? i got t= 10 b) how fast is volume changing when t=5? i got 9.75 is this right.
asked by Mark 
Math
An airplane is going 300 mph at a bearing of N 55 degrees E. The wind is blowing 30 mph due East. What is the actual speed and direction of the plane?
asked by Shayne 
Slope Derivative
Find the slope of f(t)= sqrt((1sin (2t)) a) at point (0,1) i got 1 b) at origin i got 1 is this right thanks
asked by Mark 
Math/230
A 350 word response how to compute probabilities using z score
asked by Mike 
english
calculate the mass and prepare 200ml 0.1M, 250 ml 0.2 N, 100 ml 3% of NaCl, Na2Co3 solution
asked by Anonymous 
language arts
What adjective could i use for the following sentence? What a_______ maps this atlas has!
asked by dan 
Is this correct?
What values (c) if any are predicted by the mean value theorem for the function f(x)= (x2)^3 on the interval [0,2]? I got x= 4 and x=0, since x=0 is within the interval I chose that as my answer. Thank you.
asked by Mark 
Chemistry
A sample of an oxide of antimony (Sb) contained 51.5 g of antimony combined with 16.9 g of oxygen. What is the simplest formula for the oxide?
asked by Greg PLS HELP 
Chemistry
If an unknown metal M is .521 g how do you calculate it's atomic mass?
asked by Christine 
Chemistry
If an unknown metal M is .521 g how do you calculate it's atomic mass?
asked by Christine 
chem
A sample of an oxide of antimony (Sb) contained 51.5 g of antimony combined with 16.9 g of oxygen. What is the simplest formula for the oxide?
asked by Greg PLS HELP 
Physics
What effect does a person's distance from a mirror have on the minimum mirror length required to produce his or her complete image?
asked by Priscy 
Physics
What effect does a person's distance from a mirror have on the minimum mirror length required to produce his or her complete image?
asked by Priscy 
Physics
What effect does a person's distance from a mirror have on the minimum mirror length required to produce his or her complete image?
asked by Priscy 
Education/Technology
A program that helps you create tests by providing you with a database of questions is A) a test generator. B) an academic tool. C) an electronic gradebook. D) an Internet service provider. I believe the answer is A, but wanted a second opinion.
asked by Lor 
English
Hello can you need the coma where I placed it? Thanks for your help. In keeping in mind the needs of the client, I will be able to meet the goals of the client.
asked by Bernie 
math
The Grade 8 students had a graduation dinner. They paid a flat rate of $125 for the use of the hall, plus $13 for each student who attended. The total cost of the dinner was $944. How many students attended the dinner ? Write an equation to solve the
asked by Cherie 
Chemistry
A solution of hydrochloric acid (HCl) contains 22.5% hydrochloric by mass. What is the molality of this solution I'm not sure how to start this problem...
asked by Maddie 
chemistry
One step in the isolation of pure rhodium metal (Rh) is the precipitation of rhodium(III) hydroxide from a solution containing rhodium(III) sulfate According to the following balanced chemical equation: Rh2(SO4)3(aq)+ 6NaOH(aq)→ 2Rh(OH)3(s)+ 3Na2SO4(aq)
asked by Jane 
Education/Technology
With the advent of digital technologies, A) audio and video support technologies were no longer considered valid media. B) digital audio and video technologies joined more traditional technologies as supports for instruction. C) research proved that
asked by Lor 
ccc
Find the equation of the line containing the point whose coordinates are (1, 2)and parallel to the graph of 5x + y = −4.
asked by wiz 
Chemistry
Write a balanced equation for the following: aqueous barium chloride reacts with aqueous sodium chromate to form aqueous sodium chloride plus solid barium chromate.
asked by Chris 
CHEMISTRY
40g of antimony combine with 80g of oxygen to form an oxide of antimony what is the simplest formula of the oxide
asked by GODBLESS 
physics
One airplane travels due north at 300 km/h while another travels due south at 300 km/h. Select the false statement. The airplanes have the same speed The airplanes have the same velocity
asked by tate 
Math
if a rubber band can be stretched to a circular shape that has a radius of 3.4 inches. how many 1.3mm diameter toothpicks could of fit within it? (1 inch = 25.4 mm)
asked by Joshua baez 
math
ISABEL WANTS A COAT THAT COAST $60. SHE HAS SAVED $42 . WHAT FRACTION OF THE AMOUNT SHE NEEDS TO SAVED.
asked by Anonymous 
chem
Consider the fermentation reaction of glucose: C6H12O6 ) 2C2H5OH+2CO2 A 1.00mol sample of C6H12O6 was placed in a vat with excess yeast. If 35.1 g of C2H5OH was obtained, what was the percent yield of C2H5OH?
asked by shane 
cHEM
It is found that 1.431 g of element X contains 7.509 × 1021 atoms. The atomic mass of X is?
asked by MIKE 
Math
What is the perimeter of an equilateral triangle with an altitude of 15m?
asked by Amber 
math
5ã2x^3xã18xy^2 simplify as much as possible (5+4ã2)(3+4ã10)multiple and simplify as much as possible
asked by the last two 
Chemistry
An organic compound that has the empirical formula CHO has a molecular mass of 145 amu. Its molecular formula is?
asked by Stefhanie help me pls 
MATH
ISABEL WANTS A COAT THAT COAST $60. SHE HAS SAVED $42. WHAT FRACTION OF THE AMOUNT SHE NEEDS TO SAVED?
asked by NORMA 
Physics (Algerbrabased)
A particle is moving clockwise around a circle with a radius 3.31 m. The magnitude of the total acceleration of the particle at the given instant is 14.3 m/s^2; the angle between the vector of total acceleration and the radiusvector of the particle is
asked by Becky 
Chemistry
An aqueous antifreeze solution is 31.0% ethylene glycol (C2H6O2) by mass. The density of the solution is 1.039 g/cm3. Calculate the molality of the ethylene glycol.
asked by Maddie 
math
Determine the equation of the function that has the indicated transformation applied to it. f(x)= 3(x+1)^22 reflection across xaxis and stretched vertically by factor of 3
asked by Thomson 
Life Orientation
What is meant by discrimination?
asked by Lerato 
Chem
When 20.0 g C2H6 and 60.0 g O2 react to form CO2 and H2O, how many grams of water are formed?
asked by Jake 
math
NOTE: this is for advanced functions, NOT physics A 2m length of board rests with one end on the floor and the other end on a small stack of bricks. A baseball is rolled up the board and back down again in a total of 4 seconds. The farthest the baseball
asked by Thomson 
MATH
JAIME MAKES $150 A WEEK. HE SPENT $112. WHAT FRACTION OF HIS WEEKLY PAY HAS HE SPENT?
asked by NORMA 
Math
AM I RIGHT: SA:2*(3.14)R*R + 2*(3.14)*R*H R4 & H10 2*3.14*4*4= 100.48 2*3.14*4*10=251.2 SA 25240.576 ________________________________________ V3.14*R*R*H V3.14*4*4*10 V502.4 ________________________________________ VL*W*H V5*9*7 V 315
asked by Aprilly 
Chem
The amount of energy needed to heat 2.00 g mercury from 50.0°C to 85.0°C is 9.87 J. The specific heat capacity of this sample of mercury is
asked by glen 
chem
A 6.75g sample of gold (specific heat capacity = 0.130 J/g °C) is heated using 55.8 J of energy. If the original temperature of the gold is 25.0°C, what is its final temperature?
asked by dave 
Chemistry
A 100.0 g sample of water at 27.0°C is poured into a 77.4 g sample of water at 89.0°C. What will be the final temperature of the water?
asked by Joshua 
Chemistry
Which of the following processes is exothermic? a.rolling a ball up a hill b.boiling water in a beaker to make steam c.allowing meat to thaw after taking it out of the freezer d.reacting hydrogen and oxygen gases to make water e.a popsicle melting on a
asked by Trisha 
math
A person purchased a $250000 home 5 years ago. he paid 20% down and signed a 30year mortgage at 6% compounded monthly. what is the unpaid balance of the loan (now that 5 years are gone). i need answer with explanation
asked by yassamin 
Math
Three Friends went to the sub shop for lunch. They ordered the 3Ft sub made with 1/4 Ham, 1/5 roast beef, 3/8 turkey. The rest of the sub is made up of lettuce, tomato, and onions. What fraction of the sub is made up of lettuce, tomato, and onions ?
asked by Zhanise 
English
Could you please check the grammar in the following sentences? Thank you very much in advance. 1.I had just turned off the light to go to sleep and I was dozing off when I felt/experienced the greatest fear in my life 2.He had tried to get in touch with
asked by John 
Math
If the two boys ate the following amounts bryan 5/16, kevin 1/6, how much did the third person marco eat ?
asked by Zhanise 
calculus
Consider the interval I=[6,7.6]. Break I into four subintervals of length 0.4, namely the four subintervals [6,6.4],[6.4,6.8],[6.8,7.2],[7.2,7.6]. Suppose that f(6)=19, f'(6)=0, f'(6.4)=−0.5, f'(6.8)=−0.1, and f'(7.2)=−0.1. What is the approximate
asked by lisa 
Chemistry
True or false? The calorie is defined as the amount of energy (heat) required to raise the temperature of one gram of water by one degree Celsius.
asked by LEE 
Geometry
The coordinates of the vertices of a parallelogram are given. Find the possible coordinates for the fourth vertex. L(0,4), M(6,0),N(2,4)
asked by Maya 
MATH
TERRY HAS A BOARD THAT IS 4 YARDS LONG. HOW MUCH NEEDS TO BE SAWN OFF TO MAKE THE BOARD 2 FEET 8 INCHES LONG?
asked by NORMA 
math
Sally answered 90% of the math test questions and 80% of the history test questions correctly. If each test had 50 questions, how many questions in all did she answer correctly? I think that she answered 85 questions in all that were correct. Am I right?
asked by Anonymous 
Geometry
Assuming that the circumference of each circle passes through the centers of the other two, and that the radius of each circle is 1, what is the total combined area?
asked by Paula 
Calculus
Let y=tan(2x+5). Find the differential dy when x=1 and dx=.3 Find the differential dy when x=1 and dx=.6
asked by Anonymous 
math help
how to write an expression using 23 and 46
asked by Anonymous 
Chemistry
When 20.0 g C2H6 and 60.0 g O2 react to form CO2 and H2O, how many grams of water are formed?
asked by pls help 
HELP PLEASE
Let y=tan(2x+5). Find the differential dy when x=1 and dx=.3 Find the differential dy when x=1 and dx=.6
asked by Anonymous 
AP Statistics
12) Which of the following statements is true? a) The sampling distribution of the difference between two proportions will always be normal. b) When comparing two population proportions, either sample proportion can be used as the unbiased estimate of the
asked by Joker 
MATH
THE RATIO OF A DOGS TO CATS AT THE PET STORE IS 1:4. IF THE PET SHOP HAS 7 DOGS, HOW MANY CATS DOES IT HAVE?
asked by NORMA 
Math
The difference between the prices of two bikes is $22. The sum of the prices is $328. How much does each bike cost?
asked by Sydney 
AP Statistics
Consider the following data collected in two recent surveys of whether voters in cities A and B favor a ballot proposition in the next election. City Sample Size In Favor A 615 463 B 585 403 Suppose you're going to conduct a significance test to see if
asked by Math Whizz 
Math
If there are 51 students on a bus and 2/3 got off how many students got off the bus
asked by Christina 
fractions
Annie walked her dog 2 1/4 miles from her house to the dog park and 3/7/8 miles around the park.Then she walked the same distance home.How many miles did she walk in all?
asked by ttuuffyy 
physics
A electric model train travels at 0.339 m/s around a circular track of radius 1.75 m. How many revolutions does it perform per second, i.e, what is the motion's frequency?
asked by thuy 
math
Marco's goal is to eat only 2,000 calories each day. One day for breakfast he consumed 310 calories, for lunch he consumed 200 more calories than breakfast, and for dinner he consumed 800. Did he make his goal? I added 310+510=810+800 and got 1,610 not
asked by jared 
physics
A electric model train travels at 0.339 m/s around a circular track of radius 1.75 m. How many revolutions does it perform per second, i.e, what is the motion's frequency?
asked by thuy 
LAST THING!
2sec^2(2x+5) dx what's the answer when dx is .3 it keeps saying i'm wrong with the one i've found
asked by Anonymous 
macroeconomics
assume that American rice sells for 100.00 per bushel, japanese rice sells for 16,000 yen per bushel, and the exchange rate is 80 yen per 1 dollar. what would be your profit per bushel of rice, and how you can make a profit in this situation
asked by connie 
Spanish
Can someone help me peer edit my work the second paragraph is my conclusion, this is about diet: Dieta Su dieta es muy importante para mantener el bueno salud. Comiendo comidas saludables ayudas su mantener fuerte un cuerpo y perder peso o subir peso, pero
asked by Carol 
math
Jan is making a pencil holder out of plastic canvas.The pencil holder will be 4 inches high. It will not have a top.The perimeter of the square base is 17.64 inches.How much plastic canvas does Jan need?
asked by peter 
math
A balance scale is perfectly balanced with two blocks on one side and ten weights on the other. If each weight equals 2.0 grams, how much does one block weigh? Please answer and explain.
asked by Anonymous 
nonfiction
When does the Narrative of Sojourner Truth take place?
asked by Anonymous 
Algebra
Minimum Wage. In 1995, the minimum wage was $4.25 per hour, and by 2010 it had increased to $7.25 per hour. a) Find the slope of the line passing through the points (1995, 4.25) and (2010, 7.25) b) Interpret the slope as a rate of change. c) If this trend
asked by tee 
Calculus
Let f be the function be defined by f(x)=5^((2x^2)1)^(1/2) A) is f an even or odd function? Justify answer. B) find the domain of f. C) find the range of f. D) find f'(x)
asked by nikki 
math
A balance scale is perfectly balanced with two blocks on one side and ten weights on the other. If each weight equals 2.0 grams, how much does one block weigh?
asked by Anonymous 
Physics 1
An astronaut in her space suit has a total mass of m1 = 76.9 kg, including suit and oxygen tank. Her tether line loses its attachment to her spacecraft while she's on a spacewalk. Initially at rest with respect to her spacecraft, she throws her oxygen tank
asked by Emily 
human life
The human population of the world is over 6 billion. The increase of the human population P (in billions) can be approximated using the following formula: P = 0.073t + 6.08, where t is the number of years after the year 2000. Use the formula to predict how
asked by Anonymous 
Math
Find the number of each kind of object in the collection. Sue's Card Collection 8 packs of baseball cards 3 fewer packs of hockey cards than football cards 17 packs in all
asked by Jackie 
CHEMISTRY: URGENT DRBob222
A mixture of 0.50 mol of ethanoic acid and 1.00 mol of ethanol was shaken for a long time to reach equilibrium. The whole mixture was titrated quickly with 1.00 mol dm3 sodium hydroxide and 80cm3 of alkali were required. 1. Write an equation for the
asked by LCLaila 
math
Marvin has a 27foot ladder. Safety standards dictate that the base of a 27foot ladder should be placed 7 feet from a vertical wall. How far above the ground will the top of the ladder be on the wall, in feet? Round your answer to the nearest hundredth.
asked by jos 
Geography
What are three colonies between 70 and 75 degrees west longitude???????
asked by Khaii jack 
Math
what if you divide circumference by diameter and don't get pi ? What does that mean about the circle (because today i got numbers that were exactly over pi and some were even under)?
asked by Alexis Thompson 
broadcasting/english
Hi I would like proofreading/feedback on my broadcasting story. BTW It's in all caps because that's how our teacher told us to write it. A MICHIGAN ATTORNEY HAS FILED CHARGES AGAINST THE WIFE OF FORMER BAY CITY BUSINESSMAN… M. VICKTORIA WILSON—THE WIFE
asked by Blaze 
math
Jan is making a pencil holder out of plastic canvas.The pencil holder will be 4 inches high. It will not have a top.The perimeter of the square base is 17.64 inches.How much plastic canvas does Jan need?
asked by peter 
Happy π Day to all mathematicians
Today, March 14, at 1:59 was a very special time.
asked by Reiny 
math
Earth's mass, in kilograms, is 5.97x10^24. the moon's mass is 7.34x10^22. How many times greater is Earth's mass (in scientific notation)?
asked by Michelle 
calculus
Let f be the function be defined by f(x)=5^((2x^2)1)^(1/2) A) is f an even or odd function? Justify answer. B) find the domain of f. C) find the range of f. D) find f'(x)
asked by nikki 
ALGEBRA
SOLVE FOR THE VARIABLE X+3=7
asked by NORMA 
algebra
solve for variable 4x=20
asked by NORMA 
Science help.
1. The ___ is the outer, thinnest layer of your skin, which houses sweat pores. (1 point) epidermis dermis fatty layer hair 2. One of the purposes of sweat glands is to release waste products, such as water and _____. (1 point) blood dirt sugar salt 3.
asked by Someone 
Math
If someone is attached to a 20 ft rope, which is attached to the corner of a building, how far can they move? If the bulding is 22 ft X 15 ft?
asked by Joe 
chemistry
A sample of chlorine gas is collected by water displacement at 23C. If the atmospheric pressure is 751 torr, what is the partial pressure due to the chlorine?
asked by Jo 
Math
How to divide 150 by 3.6 please tell me with steps I tried it several times but can't seem to figure it out!!!
asked by Hibiscus 
biology
In this problem, 6 amino acids have been randomly selected from the 129 amino acids in lysozyme; they are shown as solid spheres. The remainder of the protein is shown as a cloud of tiny dots. Your task is to find out which of the 6 amino acids are on the
asked by selly 
Clueless in calculus
Let f be the function be defined by f(x)=5^((2x^2)1)^(1/2) A) is f an even or odd function? Justify answer. B) find the domain of f. C) find the range of f. D) find f'(x)
asked by Dani 
more Broadcasting/english
May I get some feedback on this one as well please? GENERAL MOTORS MAY INVEST 38 MILLION DOLLARS TO EXPAND ITS LANSING GRAND RIVER ASSEMBLY PLANT… THIS MOVE COULD BRING 150 JOBS. THE PRESIDENT AND CEO OF LANSING ECONOMIC AREA PARTNERSHIP (LEAP)
asked by Blaze 
Chemistry
If the molality of a CaCl2 solution is .100 mol/kg, and was made from 500.0 mL of water, how many grams of CaCl2 were needed to make the solution? Step by step would be appreciated!
asked by Tim 
physics
When a driver brakes an automobile, friction between the brake disks and the brake pads converts part of the car's translational kinetic energy to internal energy. If a 1280 kg automobile traveling at 30.8 m/s comes to a halt after its brakes are applied,
asked by Jayde Larson 
physics
A rocket moves upward, starting from rest with an acceleration of 30.5 m/s2 for 3.39 s. It runs out of fuel at the end of the 3.39 s but does not stop. How high does it rise above the ground?
asked by John Miller 
CHEM
A 0.4647g sample of a compound known to contain only carbon, hydrogen, and oxygen was burned in oxygen to yield 0.8635 g of CO2 and 0.1767 g of H2O. What is the empirical formula of the compound? i got C3H3O2 IS IT RIGHT?
asked by shane 
english
Circle the word with two vowels together where each vowel has a separate vowel sound. Then underline the letters that stand for the two different vowel sounds. 1 clean, paint, patio
asked by jasmine 
math
Joe says that knowing 2x3 helps him know 4x6 is he right explain
asked by philip 
Chemistry
What type of reaction will occur when an aqueous solution of lithium chloride is mixed with an aqueous solution of ammonium sulfate?
asked by Brian 
english
What is is in shirly english
asked by sarah sosnin 
Chemistry
What is the CCH bond angle in the molecule H2CCO?
asked by Brian 
Chemistry
How many valance electrons are there in [(C2H5)4N]+ ?
asked by Brian 
Chemistry
What is the wavelength of an electron traveling at 7.59% of the speed of light?
asked by Brian 
Chemistry
A compound containing only carbon, hydrogen and oxygen is subjected to elemental analysis. Upon complete combustion, a .1804g sample of the compound produced .3051g of CO2 and .1249g of H2O. What is the empirical formula of the compound?
asked by Brian 
Let f be the function be defined by f(x)=5^((2x^2)
Let f be the function be defined by f(x)=5^((2x^2)1)^(1/2) find the range of f without using a calculator
asked by Aparna 
artist
Is it possible for a band or artist to make topical or political commentary in a song today while focusing on turning a profit?
asked by ashley 
History
Hi can you help me find a website for teens in the 1920's and a journal on it.
asked by Marco 
english
circle the words with two vowels together where each vowel has a separate vowel sound, then under line the letters that stand for the two different vowel sounds. 2. audio, faith, search. 3. greed, journal, rodeo 4. either, medium, southern. 5 beach, pound,
asked by jasmine 
math
Solve for x in the equation (x − 7)^2 − 4 = (x + 1)^2.
asked by mathlab 
Math
Bus A leaves interchange 6 minutes, Bus B leaves 12 minutes later, Bus C leaves 18 minutes later. If all buses leave at 6 am when will all 3 buses leave at the same time again. Kindly show workings and explantion to problem. Thank you
asked by Maggie 
Physics
What is the total kinetic energy if a 0.30 kg block is sliding on a smooth horizontal surface at 2.5 m/s, heading towards a light spring that is in equilibrium?
asked by PC 
Physics
What is the total kinetic energy if a 0.30 kg block is sliding on a smooth horizontal surface at 2.5 m/s, heading towards a light spring that is in equilibrium?
asked by PC 
Education
1. in a study examining preschoolers' responses to their peers distress, researchers used ___ to record each instance in which a child cried, followed by other children's reactions. a. time sampling b. systematic collection c. event sampling d. structured
asked by Joe 
Math
What is an easy drawing that has a lot of circles in it.
asked by Julie 
algebra
solve for variable x/8=42
asked by NORMA 
physics
A 1.85 m tall basketball player attempts a goal 9.3 m from a basket (3.05 m high). If he shoots the ball at a 45° angle, at what initial speed must he throw the basketball so that it goes through the hoop without striking the backboard?
asked by John Miller 
Math
Which is greater 0.9 x 2 or 2 + 9? My answer is 0.9 + 2 is greater because it equals 2.9 and 0.9 x 2 = 1.8.. Is this correct?
asked by Mike 
chemistry
When 25.0 mL of 1.0 M H2SO4 is added to 50.0 mL of 1.0 M NaOH at 25.0 °C in a calorimeter, the temperature of the aqueous solution increases to 33.9 °C. Assuming the specific heat of the solution is 4.18 J/(g·°C), that its density is 1.00 g/mL, and
asked by nobody 
Social studies
About 40,000 kinds of flowering plants grow in
asked by Shaneikque 
Math Probability
Using a standard deck of 52 cards find each probability. 1.)King, queen, or black card 2.)Spade or hearts card
asked by B1nary 
statistics
A diabetes nurse educator believes that her patients have particularly bad control of their blood sugar. To test this she selected the fasting blood sugar values for 15 of the patients she saw this week. The national mean for patients with this level of
asked by Kim 
physics
If You do 100 j of work to elevate a bucket of water,what is its gravitational potential energy relative to its starting position?
asked by Tyler 
Math
If there are 51 students on a bus and 2/3 got off how many students got off the bus
asked by Christina 
algebra
A boat can travel 16 km/h against the current.The same boat can travel 30 km/h with the current.find the rate of the boat in still water and the rate of the current. Could someone help me.it seams like an easy problem, but I am not getting there.Thank YU
asked by Josie 
fractions
Terry weighed his two cats at the veterinarian's office.Boots weighed 12 9/10 pounds. and Tiger weighed 13 1/4 pounds.What is the total weight of both cats?How can I explain this
asked by ttuuffyy 
writing prompt at least five sentences
describe why it is important to protect our forest .write at least 5 sentences convincing me why we should protect them.
asked by e a 
math
In 2009, there were 12 million fewer acres of farm land in Arizona than there were in 1980. If the sum of acreage for these two years is 64 million acres, find the number of farm land acres in Arizona for each of these years.
asked by tee 
writing
I need help how to describe why it is important to protect our forest. write five convincing sentences why we should protect them..
asked by e a 
Math
Order from least to greatest 4/10,0.3,1/2
asked by Terrell 
CHEMISTRY: URGENT DRBob222
Why was the reaction mixture titrated quickly? (question fom: A mixture of 0.50 mol of ethanoic acid and 1.00 mol of ethanol was shaken for a long time to reach equilibrium. The whole mixture was titrated quickly with 1.00 mol dm3 sodium hydroxide and
asked by LCLaila 
algebra 2
3n/(n2 7n + 10)  2n/(n28n+15)
asked by Mikayla 
calculus
R(t) = −131t − 749.5 million dollars per year and the rate of change in the annual operating profit may be modeled by P(t) = 12t + 76 million dollars per year, where t is the number of years since the end of 1999. Determine the accumulated change in
asked by bobbi33 
physics
A light spring with a spring constant of 105.0 N/m rests vertically on the table, as shown in (a) below. A 2.05 g balloon is filled with helium (0°C and 1 atm pressure) to a volume of 4.64 m3 and connected to the spring, causing the spring to stretch, as
asked by John Miller 
science
wordy numbers: 6224463 (let it do the work)
asked by brooke 
english
I wrote, Ms.Marcus is tall and a little bit skinny. What are the two sound effects in the line above? Which words are involved in each sound effect. Please help I'm not good with English class thanks :)
asked by steph 
Math
Where do the perentheses go to solve this problem : 7  6 x 7 DEVIDE 5 + 7 = 43 2/3
asked by Laura 
Chem
40. If 12.0 gram of O2 is required to inflate a balloon to a certain size at 27 degrees C, what mass of O2 is required to inflate it to the same size and pressure at 81 deg C?
asked by Vince 
social studies
information on the preamble,declaration of natural rights, list of grievance, declaration of independence by U.S.
asked by Anonymous 
Algebra
Help Please!! Write the orderd pair describing the coordinates of each intercept : xintercept: 17 : yintercept: 3/4
asked by Nicole 
social studies
the preamble: six goals for the U.S. Government. information on six goals for this
asked by Anonymous 
Algebra
The recommended daily intake (RDI) of a nutritional supplement for a certain age group is 600 mg/day. Actually, supplement needs vary from person to person. Write an absolute values inequality to express the RDI plus or minus 50 mg and solve it.
asked by Jon 
Algebra
Solve 6  4x < 13
asked by Jon 
Algebra
Solve 1/5x  3 = 1/2x  1/5x
asked by Jon 
math
A student was asked to find the inverse of the function f(x)=3x7. The student began the solution with the following: Write f(x) = 3x7 as y = 3x7 x= 3y7 The student eventually got the right answer for f^(1)(x) [inverse notation] but did not get full
asked by Hasane 
Algebra
Solve 0.17y + 0.03(y + 9000) = 870
asked by Jon 
Algebra
Solve 4y – 3 > 8
asked by Jon 
physics
what factors can affect a bodies temperature rise?
asked by sophie 
health Ms. Sue please
1. The body's functions are slowed when alcohol reaches where? (1 point) The stomach The heart The liver The brain 2. Which statement is NOT true? (1 point) Regular use of alcohol can lead to addiction. Alcoholism can be cured. Someone cannot cause someone
asked by Delilah 
physics
differences btw a window unit airconditioner and splitunit air conditioner.(2)explain d working principle of a freeze dryer using a diagram
asked by sophie 
Math
3n/(n2 7n + 10)  2n/(n28n+15) thanks
asked by Nathan 
Math
maria has a slice of pizza that is 1/6 of the pizza. Ben has a slice of pizza that is 1/3 of the pizza. Maria's slice is bigger. Draw pizzas to show how this is possible.
asked by Anonymous 
physics
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 1720 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 81.0 kg,
asked by Nicole 
Chemistry
If 11.6 mL of 0.17 M MgCl2 are mixed with 24.9 mL of 0.58 M NaOH, what will be the final concentration of Mg2+ in solution when equilibrium is established? Assume the volumes are additive. Ksp = 1.2 1011 for Mg(OH)2
asked by Gregory 
Chemistry
A saturated solution of Mg(OH)2 is prepared having a large excess of Mg(OH)2. Sn(NO3)2 is added to the solution. Ksp = 1.8 1011 for Mg(OH)2 and Ksp = 5.1 1026 for Sn(OH)2. (a) What [Sn2+] is required to start the precipitation of Sn(OH)2? (b) What [Sn2+]
asked by Gregory 
Question!!!!
Do advertisers tell the society what they want to hear just so they can make money?
asked by Anonymous 
Statistics
A coin is tossed 10 times. What is the probability that the third head will apear on the tenth toss?
asked by Nick 
English
The most important task related to reading is: A. reading speed. B. reading comprehension. C. taking notes. D. memorization. is it B
asked by Amy 
mathematics
the 1st term of arithmetic series is 2 .the 1st ,3rd and 11th terms are the first the terms of a geometric series. find the 6 terms of the arithemetic series
asked by cebile 
English
Speed reading is concerned with: A. how fast you read. B. the number of words read in a minute. C. reading rate as well as comprehension of what was read. D. recalling three main points in three minutes. is it C
asked by Amy 
math asap
I don't understand can you please help bedtime 1. (5)(6)+(1) 2. (3.1)(7.5)+(+1.8) 3. (9)+(2)(6)+(5) 4. (+5.2)+(2.6)(3.7) 5. (8)(+7)(+10) 6. (+4.5)(3.25)(+1.5) Please answer all 6 if possible thanks!
asked by noahc 
English
Which is the better strategy in notetaking? A. Take as many notes as possible. B. Study your notes closer to exam time. C. Take notes according to chapter objectives. D. Notes should only include key words. is it A
asked by Amy 
College algebra
Answer the questions about the following functions. f(x) = 14^2/x^4 + 49 (a) Is the point (sqrt 7,1) on the graph of f? (b) If x=1, what is f(x)? What point is on the graph of f? (c) If f(x)=1, what is x? what point(s) are on graph of f? (d)What is the
asked by Jenn 
Chemistry
What concentration of SO32– is in equilibrium with Ag2SO3(s) and 3.20 × 103 M Ag ? The Ksp of Ag2SO3=1.50×10^–14 The ksp expression is 1.50×10^14=(Ag^+2)^2(SO3^2)/(Ag2SO3). Is the concentration 3.0×10^9?
asked by Anon 
sociology
There is a disparity between theory and direct observation. Because theories are based on observations, how are these theories first developed in the absence of direct observations?
asked by Jo 
ecology
During the demographic transition of the eighteenth century, humankind led advances in mortlity and economy, leading to a prosperous population growth. What types of resources are necessary for population change and how might the availability of resources
asked by Jo 
sociology
How have families changed over time and what relationship does this have to population structure? Provide an example on one social institution that has been affected by these shifts in family composition?
asked by Mel 
broadcasting/english
feedback is appreciated, thanks in advance THOUSANDS OF JOBLESS MICHIGANDERS WILL RECEIVE LESS MONEY IN THEIR WEEKLY EMERGENCY UNEMPLOYMENT CHECKS. MORE THAN 74 THOUSAND PEOPLE IN MICHIGAN RECEIVE BENEFITS THROUGH FEDERALLY FUNDED EMERGENCY UNEMPLOYMENT
asked by Blaze 
Chemistry
A solution is 5.0× 10–5 M in each of these ions: Ag , SO42–, Cl–, CO32– Which precipitate will form? Ag2SO4 (Ksp = 1.12× 10–5) AgCl (Ksp = 1.77× 10–10) Ag2CO3 (Ksp = 8.46× 10–12)
asked by Anon 
Language Arts
I will give the questions and my answers. Someone check it please. Read the passage below and answer the questions that follow. To the Top “Great works are performed, not by strength, but by perseverance.” Samuel Johnson Have you ever wanted to give
asked by Sam 
Chemistry
Which of the following will be more soluble in an acidic solution than in pure water? Be(OH)2 Ag2SO4 RbClO4 CuCN Cul
asked by Anon 
English
Africa was one of the sites where agriculture began. Archaeological investigations suggest that knowledge of cultivation moved west from the ancient Judaea (southern Palestine) and arrived in the Nile Delta in Egypt about the fifth millennium before
asked by Amy 
Help! stuck on this math question
3n/(n^2 7n + 10)  2n/(n^28n+15)
asked by Mikayla 
Chemistry
If 18.7 mL of 0.14 M MgCl2 are mixed with 24.2 mL of 0.52 M NaOH, what will be the final concentration of Mg2+ in solution when equilibrium is established? Assume the volumes are additive. Ksp = 1.2 1011 for Mg(OH)2.
asked by Arturo 
Math
Aubrey spent 2/7 of her money and gave 1/4 of the remaining money to her hungry parents. she had $120 left. How much did she have left?
asked by Scott 
Math
The median score on attest is 90. Is it possible to add two or more scores to the data and still have a median score of 90? Explain
asked by Brandon 
Maths
data with mean of 32, standard deviation of 1.2, What is the 99th percentile score?
asked by Enoch 
Math
27a4b7 (A1)3  •  = ? 3a26a3 9ab
asked by Chely 
physics
Calculate the effective value of g, the acceleration of gravity (in meters/second^2), at 5100 km above the earth's surface.
asked by Nicole 
Chemistry
Solid Na2SO4 is added to a solution which is 0.020 M in Pb(NO3)2 and 0.045 M in AgNO3. Assume the volume remains constant. Ksp = 2.0 108 for PbSO4 and Ksp = 1.2 105 for Ag2SO4. What is the concentration of the first ion precipitated when the second ion
asked by John