Questions Asked on
March 22, 2013

math check answer
1. Which line models the data points better and why? blue, because the data points are all close to the line red, because it goes through one of the points i think that is A
asked by batman 
Physics
A ball is projected upward at time t= 0.0s, from a point on the roof 10m above the ground. The ball rises, then falls until it strikes the ground. The initial velocity of the ball is 58.5 m/s. At time t=5.97s, what is the approximate velocity of the ball?
asked by Renay 
Statistics
A national caterer determined that 87% of the people who sampled their food said that it was delicious. A random sample of 144 people is obtained from a population of 5000. The 144 people are asked to sample the caterer's food. If sample proportion, P^, is
asked by Grace 
Chemistry
The amount of energy released by burning a fuel source, measured in energy per mass, is called the fuel value. If all the energy obtained from burning 1.25 pounds of butane (fuel value is 10.85 kcal/g) is used to heat 120.0 kg of water at an initial
asked by Lara 
Chemistry
What is the reduction halfreaction for the following unbalanced redox equation? Cr2O7^2– + NH4^+ Cr2O3 + N2 A.Cr2O3> Cr2O7^2– B.Cr2O7^2– > Cr2O3 C.NH4^+ > N2 D.N2 > NH4^+ I think this is D...?
asked by cassie 
chemistry
2. What is the reduction halfreaction for the following unbalanced redox equation? Cr2O72– + NH4+ Cr2O3 + N2 A.) Cr2O3 > Cr2O7^2– *B.) Cr2O72– > Cr2O3 C.) NH4+ > N2 D.) N2 > NH4+ 3. Which oxidationreduction reactions are best balanced by the
asked by jack 
Physics
A ship maneuvers to within 2500 m of an island's 1800 m high mountain peak and fires a projectile at an enemy ship 610 m on the other side of the peak, as illustrated in Figure 329. If the ship shoots the projectile with an initial velocity of v = 248 m/s
asked by Nicola 
math check answer
4. Which of the following is true about a trend line for data? The minimum data point always lies on the trend line. Every data point must lie on the trend line. The trend line describes the pattern in the data if one exists.*** The trend line includes the
asked by batman 
Math Ms. Sue please
7. Which of the following types of information is NOT suited for display on a scatter plot? (1 point) relationship between age and number of books read in a year relationship between height and shoe size relationship between calories consumed and body
asked by Delilah 
Legal aspects of health Information management
Case Discussion Dr. Pearson has recently been hired into the Central City Internal Medicine Group as its fifth physician. He has recently completed his residency and is eager to enter private practice. Dr. Pearson is introduced to Meredith and Dawn, two
asked by Iuliana Pop 
Chemistry
What coefficient of H+ balances the atoms in the following halfreaction? H^+ + MnO2 Mn^2+ + H2O A.1 B.2 C.3 D.4 I think this is B...?
asked by cassie 
University Physics
A hollow copper wire with an inner diameter of 0.60mm and an outer diameter of 1.8mm carries a current of 15A. What is the current density in the wire?
asked by Wolf 
quantitative chemistry
Consider a solution made by mixing 500.0 mL of 0.04182 M Na2HAsO4 with 500.0 mL of 0.03645 M NaOH. Complete the mass balance expressions below for Na and arsenate species in the final solution. There are 4 arsenate species, but I only got three of them. I
asked by Jackie 
Chemistry
Please help me solve this question: A layer of peat beneath the glacial sediments of the last ice age had a carbon14 content of 25% of that found in living organisms. How long ago was this ice age?
asked by Mon 
college
A solid is known to be either BaCO3 or CaCO3. It is dissolved in 6 M acetic acid. A pale yellow precipitate forms when K2CrO4 solution is added. The subsequent flame test with that precipitate shows an orangered color. Which cation is present? Briefly
asked by Anonymous 
CHEM HELP!!!
The solubility of AgCl(s) in water at 25 C is 1.33x10^5 M and its deltaH of solution is 65.7 kJ/mol . What is its solubility at 60.1 C ? Please explain how to solve for this!!
asked by Lena 
Physical science
Help Please . Aisha drops an antacid tablet in water and times how long it takes to dissolve. Which of the following will decrease the reaction rate? A.increasing water temperature B.decreasing water temperature C.using more water
asked by Brittany 
Chemistry: check answers
Please check. Thank you. 2. What is the reduction halfreaction for the following unbalanced redox equation? Cr2O72– + NH4+ Cr2O3 + N2 A.) Cr2O3 > Cr2O72– B.) Cr2O72– > Cr2O3 C.) NH4+ > N2 D.) N2 > NH4+ 3. Which oxidationreduction reactions are
asked by Jack 
Chemistry
2M +6HCl–>2MCl+3H2 Delta H= 638.0 Kj HClg—>HCl aq= Delta H 74.8 Kj H2+Cl2–>2HCl Delta H 1845.0 Kj MCl3s–> MCl3 aq Delta H 249.0 Kj Use the information above to determine the enthalpy of the following reaction. 2M +3Cl2–>2MCl3 Delta H =???
asked by Raul 
Chemistry
What is the pH of a .0035 M Ba(OH)2 solution. I did log(.0070) to find pOH So 142.15=11.85 pH? Just want to double check.
asked by Sarah 
Geometry
The length of one base of a trapezoid is 19 inches and the length of the median is 16 inches. Find the length of the other base.
asked by Alice 
Minimum Concentrations  Urgent help!
What is the minimum concentration? Determine the minimum concentration of the precipitating agent on the right to cause precipitation of the cation from the solution on the left. 8.0 x 10^2 CaI2, K2SO4 1.5 x 10^3 AgNO3, RbCl The Ksp values for both are
asked by Amy 
Thermodynamic
During a spontaneous chemical reaction, it is found that δSsys < 0. This means __________ a. δSsurr < 0 and its magnitude is < δSsys. b. δSsurr < 0 and its magnitude is > δSsys. c. δSsurr > 0 and its magnitude is < δSsys. d. δSsurr > 0 and its
asked by Flavia 
maths
THE RAILROAD TRACK BETWEEN TOWN A AND TOWN B IS 500 MILES LONG THE BLUE TRAIN IS SCHEDULED TO LEAVE TOWN A FOR TOWN B AT 2 P.M THE RED TRAIN IS SCHEDULED TO LEAVE TOWN B FOR TOWN A AT 3 P.M BUT IS DELAYED 95 MINUTES DUE TO ENGINE PROBLEM . IF THE BLUE
asked by Anonymous 
Chemistry Please Help
2. What is the reduction halfreaction for the following unbalanced redox equation? Cr2O7^2– + NH4^+ Cr2O3 + N2 A.) Cr2O3 > Cr2O7^2– B.) Cr2O7^2– > Cr2O3 C.) NH4^+ > N2 D.) N2 > NH4^+ I think it is B...? 3. Which oxidationreduction reactions are
asked by cassie 
Chemistry
The value of Kc for the reaction below is 1.6 C(s)+CO2(g)=2CO(g) What is the equilibrium concentration of CO when [CO2]=.50M? The usual ICE table doesn't work for me. C(s)+CO2(g)=2CO(g) I  0 C x +2x E .50 +2x 1.6=[2x]^(2)/(.50) That's how I did it but
asked by Ezra 
Graphs
What type graph does not show the number of times a response was given boxandwhisker plot line plot stemandleaf plot bar graph is it a line plot?
asked by Mr.Brain 
physical
A basketball player who is 2.0m tall is standing on the floor 10.0m from the basket,If he shoots the ball at a 40.0¤ angle witi the horizontal,at what initial speed must he throw so that it goes through the hoop without striking the backboard?The basket
asked by yenebeb 
social studies
Which of the resolutions at Seneca Falls Convention was most inspired by women’s inability to own property? (1 point)
asked by social studies 
physics
A small 0.533kg object moves on a frictionless horizontal table in a circular path of radius 1.10 m. The angular speed is 6.41 rad/s. The object is attached to a string of negligible mass that passes through a small hole in the table at the center of the
asked by cody 
Chemistry
2. What is the reduction halfreaction for the following unbalanced redox equation? Cr2O72– + NH4+ Cr2O3 + N2 A.) Cr2O3 > Cr2O7^2– *B.) Cr2O72– > Cr2O3 C.) NH4+ > N2 D.) N2 > NH4+ 3. Which oxidationreduction reactions are best balanced by the
asked by jack 
mathsbinomial theorem
how can we show that there is no constant in the expansion of [2x – (x^2/4)]^9
asked by anoynomous 
Physics
Lighting strike: Storm clouds build up large negative charges that dwell in a charge center. Suppose a storm cloud has 25 C in a charge center located 10 km above the ground. The negative charge center attracts an equal amount of positive charge that is
asked by Cassie 
Algebra (word problems)
Studying help! Flights of leaping animals typically have parabolic paths. The figure illustrates a frog jump superimposed on a coordinate plane. The length of the leap is 9 feet, and the maximum height off the ground is 3a feet. Find a standard equation
asked by John 
physics
Calculate the mass needed in order to suspend the leg shown in the figure(Figure 1) . Assume the leg (with cast) has a mass of 14.0 , and its CG is 34.0 from the hip joint; the sling is 81.5 from the hip joint.
asked by Megan 
Statistics
A car rental agency currently has 41 cars available, 28 of which have a GPS navigation system. Two cars are selected at random from these 41 cars. Find the probability that both of these cars have GPS navigation systems
asked by Anonymous 
AP Physics
A small block with mass 0.035 kg slides in a vertical circle of radius 0.425 m on the inside of a circular track. During one of the revolutions of the block, when the block is at the bottom of its path, point A, the magnitude of the normal force exerted on
asked by Hannah 
psychology
2. Last week, Roger suddenly quit his job. He told his family he had decided to learn carpentry. He purchased a truckload of wood and nails, which now sits in his driveway because he changed his mind and decided to enroll in a school for massage therapy.
asked by bookie 
chemistry
draw all possible z isomers for an alkene with the formula C4H7Br. im having some difficulty, please help
asked by maura 
Math
Please help!!! Scott bought 54m of fencing to enclose a rectangular plot of land. The width of the rectangular plot is 12m. Assume Scott uses all the fencing. What is the length of the rectangular plot of land? a) choose a variable to represent the length
asked by Cherie 
Chemistry
What is Kc for the following equilibrium? For phosphoric acid, Ka1=6.9x10^3, Ka2=6.2x10^8 and Ka3=4.8x10^13 HPO4^2 + OH^ PO4^3 + H2O
asked by Sara 
Math
Find the area of a circular segment of a circle of radius 7cm that sub tends a central angle of 35 degrees?
asked by Anna 
Math
I REALLY NEED HELP PLEASE PLEASE HELP ME WITH THIS JUST CHECK IF THERE RIGHT IF NOT THEN GIVE ME THE RIGHT ANSWER PLEASE PLEASE !!!!! :( :( 1) The length of a room is 5 . 048 ×102 cm. Which number is equivalent to this length? A 0.005048 cm B 0.05048 cm C
asked by Destiny 
maths
a and b are positive numbers that satisfy the equation 1/a−1b=1/a+b. Determine the value of a^6/b^6+b^6/a^6.
asked by rita 
chemistry
how do i calculate the NaOH molarity from a titration of KHP and NaOH after preparing KHP to standardise NaOH. KHP mass was 2.0378g dissoveld in distilled water to fill up a 100ml volumetric flask and only 10ml of this solution was used to in titration
asked by k 
math
The total weekly cost (in dollars) incurred by Lincoln Records in pressing x compact discs is given by the following function. C(x) = 2000 + 2x  0.0001x2 (0 x 6000) (a) What is the actual cost incurred in producing the 1011st and the 1821st disc? (Round
asked by Kaleia 
Algebra
Please help I can't figure out these two. Express f(x) in the form a(x − h)2 + k. f(x) = −4x2 + 24x − 9 Find the standard equation of a parabola that has a vertical axis and satisfies the given conditions. vertex (0, −7), passing through (3, 38)
asked by Eric 
physics
A hypodermic syringe is attached to a needle that has an internal radius of 0.303 mm and a length of 3.02 cm. The needle is filled with a solution of viscosity 2.00 103 Pa · s; it is injected into a vein at a gauge pressure of 16.1 mm Hg. Ignore the
asked by ray 
math
Let the total cost function C(x) be defined as follows. C(x) = 0.0008x3  0.04x2 + 99x + 4400 Find the average cost function C. C(x) = ?? Find the marginal average cost function C '. C '(x) = ??
asked by Kaleia 
Physics
A ship maneuvers to within 2500 m of an island's 1800 m high mountain peak and fires a projectile at an enemy ship 610 m on the other side of the peak, as illustrated in Figure 329. If the ship shoots the projectile with an initial velocity of v = 248 m/s
asked by Nicola 
Chemistry (2 questions)
1. What kinds of bonds will most likely form from groups 1,2,3,6,7, and 8 on the periodic table? 2. What kinds of bonds will most likely form from group 4 on the periodic table?
asked by Angie 
quantitative chemistry
Determine [Zn2 ], [CN–], and [HCN] in a saturated solution of Zn(CN)2 with a fixed pH of 1.78. The Ksp for Zn(CN)2 is 3.0 × 10–16. The Ka for HCN is 6.2 × 10–10. I know the following is what needs to be done, but im unsure of how to go about it. 1.
asked by Jackie 
physics
Lora (of mass 42.8 kg) is an expert skier. She starts at 2.3 m/s at the top of the lynx run, which is 114 m above the bottom. What is her ﬁnal kinetic energy at the bottom of the ski run? Answer in units of J
asked by Anonymous 
Math
Uncle Ritchie has some $10 bills in his wallet. He shares all of them equally among his 4 nieces and nephews. Each of the nieces and nephews then donates two $10 bills to charity. They then each have five $10 bills. How many $10 bills did Uncle Ritchie
asked by Cherie 
physics
Near San Francisco, where the vertically downward component of the earth's magnetic field is 4.7 105 T, a car is traveling forward at 26 m/s. The width of the car is 1.7 m. (a) Find the emf induced between the two sides of the car. V (b) Which side of the
asked by purplegoddess 
Chemistry
What is the hydronium ion concentration of a buffer solution that is 0.10M NaHPO4 and 0.50M NaH2PO4? For H3PO4,Ka1=6.9x10^3, Ka2=6.2x10^8, Ka3=4.8x10^13
asked by Viv 
Math
Which statement represents the inverse of the statement, "If it is snowing, then Paul wears a sweater"? A. If Paul wears a sweater, then it is snowing. B. If Paul does not wear a sweater, then it is not snowing. C. If it is not snowing, then Paul does not
asked by Amy 
physics
1. Air flowing through a vent pipe of crosssectional area 21[m^2] is traveling 0.89[ms^1]. What is the flowrate? [18.7 m3s1] Answer with three significant figures (don't forget to round!) or N/A if there is not enough information to answer the question.
asked by Sean 
Physics
A ball is fired from the ground with an initial speed of 1.36 103 m/s (approximately four times the speed of sound) at an initial angle of 49.0° to the horizontal. Neglect air resistance.
asked by Nicola 
Discrete Math
(2) Suppose A is the set of students currently registered at the University of Calgary, B is the set of professors at the University of Calgary, and C is the set of courses currently being offered at the University of Calgary. Under what conditions is each
asked by Sue 
math
surface area of a rightcircular cylinder. The area of a right circular cylinder is given by the polynomial 2pierh^2 where h is the height and r is the radius of the base. Suppose that a beverage can has a height of 6.2 inches and a radius of 1.3 inches.
asked by pam 
health
Mark is a 30yo businessman who was diagnosed with Crohn’s dz over ten years ago; otherwise, he’s a healthy guy. He’s been free of flareups for the past couple of years, but a recent business trip to Thailand (stress, new foods) may have been the
asked by Anonymous 
Algebra 2
Find a value(s) that makes the expression y^2  16  undefined. y^2 + 16 y=4i?
asked by Lily 
classical physics
Question 14 Give reasons for the answers to each of the following questions: a) Can a normal force be horizontal? b) Can a normal force be directed vertically downward? c) Consider a tennis ball in contact with a stationary floor and with nothing else. Can
asked by Pritesh 
History
While Robert Moris's tax proposal didn't take effect and the bank of north america did not resuciate the economy in the 1780's, the confederation still had the potential to obtain wealth through... a) Sale of the huge territory ceded by Virginia, which in
asked by Anyone who is good in history? 
urgent urgent algebra / precalculas
For # 1, im getting stuck on this problem i don't understand this 1.4 = e ^ (0.03k) Now take the natural logarithm of both sides to solve for , ln 1.4 = ln e ^ (0.03k) ln 1.4 = 0.03k * ln e Recall that ln e = 1. ln 1.4 = 0.03 k Solve for k. Then try part
asked by zachary 
physics
Calculate the magnitude of the gravitational force between the Earth and an m = 6.00 kg mass on the surface of the Earth. The distance to the center of the Earth from the surface is 6.37×103 km and the mass of the Earth is 5.98×1024 kg. B)Calculate the
asked by Sara 
physical science
Help please. Aisha drops an antacid tablet in water and times how long it takes to dissolve. Which of the following will decrease the reaction rate?
asked by Brittany 
Chemistry
what is the pH of a solution prepared by adding 0.259g of ammonium chloride to 115mL of water? Kb of NH3 is 1.8x10^5
asked by Jill 
Physics!
At an instant when a soccer ball is in contact with the foot of the player kicking it, the horizontal or x component of the ball's acceleration is 860 m/s2 and the vertical or y component of its acceleration is 930 m/s2. The ball's mass is 0.38 kg. What is
asked by Christina 
Physics!
The steel Ibeam in the drawing has a weight of 9.03 × 103 N and is being lifted at a constant velocity. What is the tension in each cable attached to its ends? With both angles being 70 degrees
asked by Christina 
math
An object that is falling or vertically projected into the air has it height, in feet, above the ground given by the formula below, where s is the height in feet, Vo is the original velocity of the object, in feet per second, t is the time the object is in
asked by pam 
physical science
What physical quantities are governed by the quantum numbers of an atomic electron?.
asked by Dee 
physics/math
Calculate the magnitude of the gravitational force between the Earth and an m = 6.00 kg mass on the surface of the Earth. The distance to the center of the Earth from the surface is 6.37×103 km and the mass of the Earth is 5.98×1024 kg.
asked by HP 
western civilizations
Thank you Ms. Sue for your two suggested sites. I have reviewed them both and can definitely use them as resources. I have chosen Francis Bacon (1561–1626)as the individual to write about. Would you have suggested sites for info about him? Thanks again!
asked by BL 
Chemistry
what is Kc at 25 celsius for the following equilibrium? CH3BH3^+ +H2O CH3NH2 + H3O^+ Kb=4.4x10^4 I got 4.0x10^4 / 1.0x10^14 = 4.0x10^10 (correct)?
asked by Bb 
Crocket
A 143m wire is cut into three pieces. The second is 3m longer than the first. The third is 4/5 as long as the first. How long is each piece?
asked by Sandy 
physics
a river flows due south with a speedof 2.0m/s.a man steers a motorboat across the river:his velocity relative to the river is 4.2m/s due east.the river is 800m wide.what is his velocity relative to the earth?
asked by kuhle 
physics/math
A puck of mass m = 1.10 kg slides in a circle of radius r = 16.9 cm on a frictionless table while attached to a hanging cylinder of mass M = 2.20 kg by means of a cord that extends through a hole in the table. What speed keeps the cylinder at rest?
asked by HP 
stat
200 tickets are sold to a raffle. It costs $5 to buy a ticket. There is one first prize winner and one second prize winner. First prize is $500. Second prize is $250. What is the value of playing this game?
asked by Kudu 
Physics
The sun goes around the center of our galaxy once every 250 million years. The sun is also 2.55×10^20 m from the center of our galaxy. What is the acceleration of our sun towards the center of the galaxy in m/s^2? Details and assumptions You may assume
asked by Jack 
Chemistry
At constant volume the heat of combustion of a particular compound is 3378.0 kj/mol.When 1.563 g of this compound ( molar mass of 126.88 g/mol )was burned temp rose 6.991 C. What's the heat capacity of the calorimeter(calorimeter is constant)?
asked by Raul 
Chemistry
Calculate the molarity of the nitrate ion in a 0.111 M solution of calcium nitrate? so would I have to find the number of moles of (NO3)2 and then divide it by the 0.111 M to get the molarity of the nitrate ion I am so confused please explain the set up I
asked by Amber 
calculus
Find the slope of the graph of the function at the given point. (If an answer is undefined, enter UNDEFINED.) x^3 + y^3 = 14xy, (7, 7)
asked by akash 
Physics
Car A passes Car B on the highway. Rlative to car A's movement, Car B is moving at a rate of 9 mph backward. If the speed of Car A is 98 mph, what us the speed of Car B?
asked by Renay 
elctronic communication
how many calories would liberated when one mole of steam at 100c condenses to H2O at 100c?
asked by harun 
Math
Suppose there is a bag containing 25 envelopes and 10 of the envelopes contain prizes. You reach in, without looking, and select 2 envelopes, without replacement. a) What is the probability that both of your picks are winner? b) What is the probability
asked by Anonymous 
Math
200 tickets are sold to a raffle. It costs $5 to buy a ticket. There is one first prize winner and one second prize winner. First prize is $500. Second prize is $250. What is the value of playing this game?
asked by Anonymous 
World History
Why did Muhammad find the religion of Islam. How and why was the religion able to spread so rapidly?
asked by Gregory 
statistics
the average proportion of red candies in a pakage is 20% and an 8 oz package contains about 250 candies.What is the probability that a randomly selected 8 oz bag contains less than 45 red candies?
asked by john 
Math/Physics
If 55034.175 kJ of heat are transferred to 150 kg of ice at a temperature of 12.15 degrees C, calculate the temperature of the resulting water. I know my formulas for sensible and latent heat but don't know how to approach this.
asked by Dylan 
urgent urgent algebra / precalculas
rewrite each in exponential expression as a logarithmic expression log, x=4 log 5=2 log b=x
asked by zachary 
Chemistry
What is the percent ionization of a solution prepared by dissolving 0.0286mol of chloroacetic acid, in 1.60L of water?for choloroacetic acid, Ka=1.4x10^3
asked by Bb 
algebra
I have a couple questions I need help on. Which model is most appropriate for the data set? (1,20),(0,10),(1,5),(2,20) And How many realnumber solutions does the equation have? 8x^28x2=0 Thanks for the help
asked by Kristine 
physics
At the surface of a freshwater lake the pressure is 102 kPa. (a) What is the pressure increase in going 34.7 m below the surface? b) What is the approximate pressure decrease in going 33 m above the surface? Air at 20° C has density of 1.2 kg/m3.
asked by ray 
Math
"If Tom buys a red skateboard, then Anne buys pink inline skates." Which statement below is logically equivalent? A. If Anne does not buy pink inline skates, then Tom does not buy a red skateboard. B. If Tom does not buy a red skateboard, then Anne
asked by Amy 
Chemistry
what is the hydroniumion concentration in a 0.35m solution of NaCO3? For carbonic acid, Ka1=4.2x10^7 and Ka2=4.8x10^11. (Kw=1.0x10^14)
asked by Sara 
Statistic
200 tickets are sold to a raffle. It costs $5 to buy a ticket. There is one first prize winner and one second prize winner. First prize is $500. Second prize is $250. What is the value of playing this game?
asked by Anonymous 
Geometry
Abcd is an isosceles trapezoid with a(10,1) b(8,3) and c(1,3). Find the coordinates of d
asked by Alice 
physics
The real image produced by a concave mirror is found to be 0.303 times the size of the ob ject. If the distance from the mirror to the screen on which the image appears is 1.14 m, what is the focal length of the mirror? Answer in units of m
asked by kevin 
math
an aquarium holding african cichlids is 2 inches higher than it is wide. Its length is 29 inches and its volumne is 3480 cubic inches. what is the height and width inches.
asked by toni 
Calculus 2
Hello, I don't know what test to use for this series: Determine the sum of the following series: inf E n=1 (2^n + 9^n) / 12^n thank you!
asked by Tom 
statistics
A countrywide estate agency specializes in selling commercial ventures. Their records show that the mean selling time is less than 90 days. Because of recent economic conditions, they believe that the mean selling time is now greater than 90 days. A
asked by general 
Math
If you are riding a bike and your front sprocket (the one with the pedals) has 40 teeth and the rear sprocket (the one connected to your back tire) has 20 teeth, and you are pedaling at a rate of 50 rpm, how fast are you going if your bike has 27 inch
asked by Jordan 
Chemistry
A gas in a discharge tube consists entirely of ions of the same element, of the same charge. Each ion has only one remaining electron. The voltage between the electrodes of the gas discharge tube is increased from zero. Electrons are accelerated across the
asked by Sam Chem 
Math
Mark found out that his profit varies as the product of the amount spent for production and the square root of the amount spent for advertising. If his total available budget for these expenses is P1.5 million, how should he allocate his funds to maximize
asked by May Ann Pascual Aragon 
physics
A coin is placed at a focal point of a converging lens. Is an image formed? If yes, is it real or virtual , erect or inverted, larger or smaller than the object?
asked by Susan 
Chemistry
Calculate the pH of a solution that is 2.00M HF, 1.00M NaOH, and 0.393M NaG (Ka=7.2 x10^4). The answer I got was 4.76 ..
asked by Jill 
English
I have to create a character sketch of nernard from aldous huxley's brave new world. Please help me with the topic sentence the three traits and quotations!! Please!!! Your help is very much appreciated!!!
asked by Krysten 
Math
The beginning tennis class has twice as many students as the advanced class. The intermediate class has three more students than the advanced class. How many students are in the advanced class if the total enrollment for the three tennis classes is 39? A.
asked by Amy 
Algebra.
Three times the square of a number minus twice the same number is 8. Find all such numbers.
asked by Haelin 
Science
If the halflife of a radionuclide is 1 month, is a sample of it completely decayed after 2 months?
asked by Dee 
Chemistry
What is the hydrogenion concentration of a solution that is 0.016M in acetic acid and 0.016M in sodium acetate at 25 Celsius? The Ka for acetic acid is 1.8x10^5
asked by Viv 
math
For the function f(p) an input of 3 yields an output value of 6. What value of p would you use to have f(5p) = 6?
asked by Katie 
Western Civilization
Please suggest some good cites to complete the following essay assignment: In your short essay assignment you need to analyze how the new enlightened worldview would lead people to challenge traditional notions of society, the state, politics and religion.
asked by BL 
English; Help..
Persuasive Writing Assignment: Imagine that you are an agent who is interested in publishing new authors. Choose any book you like and present the book to a publisher in New York. You want to be the person responsible for putting the book on the shelf. Any
asked by Unknown 
Algebra 2
Solve 12^x = 14^3x. I know I need to make the bases the same, but I don't know how.
asked by Lily 
My last three questions. please.
opposition to the constitution came from substantial majorities in which of the following three states populous states? A) North Carolina, Virginia and Pennsylvania b) Virginia, Massachusetts, New York c) Massachusetts, pennsylvania, georgia d) North
asked by Anyone who is good in history? 
maths
Let P=(p1,p2,…,p7) be a permutation of the integers 1,2,…7. For how many permutations P are all seven sums S1=p1,S2=p1+p2,…,S7=p1+p2+⋯+p7 not multiples of 3? Details and assumptions A permutation is a rearrangement of the entire set of objects.
asked by rita 
physics
A rectangular conducting homogeneous (which means the material is the same throughout) block has dimensions 1cm×2cm×3cm . A voltage V is applied between all opposite faces of the block and the corresponding currents were recorded. What is the maximum
asked by rita 
physics
n this problem, we will carry out some steps of the quantum factoring algorithm for N=15. (a) What is the period k of the periodic superposition set up by the quantum factoring algorithm if it chooses x=2? (b) Assume that we found this k using period
asked by s 
calculas
At time t=0 s, the radius of a circle is equal to 15 cm. The radius of the circle increases at a rate of 0.5 cm/s. The rate of change of area at t=20 s is equal to mπ cm^2/s, where m is a positive integer. What is the value of m?
asked by stranger 
Physics
A rectangular conducting homogeneous (which means the material is the same throughout) block has dimensions 1cm×2cm×3cm . A voltage V is applied between all opposite faces of the block and the corresponding currents were recorded. What is the maximum
asked by Jack 
chemistry
why is it necessary to try and keep the temperature constant during an experiment of determining pKa by pH measurements?
asked by k 
maths
What is the value of e^i(pi)? where i^2 =1 ,e =exponential
asked by black_widow 
Macroeconomics
Can I get answers from questions assigned from the text book?
asked by LEW 
phiycis
when 12ohm resistance joint in triangle caculate 1arm resistance
asked by vinod 
Forces (Science)
What slope would a person have on a distancetime graph if they were speeding, slowing down, or not moving at all?
asked by Angie 
Chemistry
Atoms of ionized lithium gas (Li2+) are struck by neutrons moving at a velocity of 1.46e5 m/s. Calculate the shortest wavelength in the emission spectrum of Li2+ under these circumstances. You can assume that all electrons start in the ground state.
asked by Sam Chem 
English
1. Application means to: A. memorize the concepts, ideas, or vocabulary learned. B. judge the merit or value of the information. C. use the knowledge learned to understand actual situations. D. breaking the idea down to component parts. is it C 2.
asked by Amy 
calculus
Find dy/dx. 7xy^3 − x^2y = 6
asked by akash 
physics
A leaf frozen into a pond in winter is 40mm below the surface of the ice. How far does the leaf seem to be ?(n=1.31)
asked by Susan 
algebra
Simplify 2/root 3(49) I solved it as 2 root 3(49) over 49. the system that I entered it in says this is incorrect. Help I need to understand how to do this problem with steps. I am so confused. Thanks
asked by sally 
maths
find first three terms in the expansion of ( 1 –x )^1/4
asked by anoynomous 
Lang. Arts
Identify the simple sentence. A.In 1970, my mother graduated from Point Pleasant Boro High School. B.The gymnast swung around the bar, and the coach stepped on the mat. C.The tornado bypassed the town, but the townspeople remained in their shelters. D.The
asked by Cassie 
stats
sample of n=64 scores is obtained from population with standard deviation =15 sample mean is 10 pts greater than the poulation mean what is zscore for sample mean
asked by tita 
Algebra
factor by grouping: 3X^2 + 7X 6 ? Please walk me through this
asked by Brieson 
mathsLinear inequations
Find the solution (feasible) of following inequations x+ 4y ≤ 24; 3x +y ≤21 ; x+ y ≤9; x≥0 and y≥0
asked by anoynomous 
chemistry
Suppose you have 19.2 g of Cu. What number of moles of Cu is present? Report your answer to 3 signifiant figures.
asked by kenya 
algebra
factor f(x)=4x^(3)+19x^(2)149x+36 into linear factors if f(x)=9
asked by Anonymous 
maths
What is the length of the curve, y=1/3(x^2+2)^(3/2), from x=0 to x=9?
asked by rohit1 
maths
The angles in triangle ABC satisfy 6sin∠A=3√3sin∠B=2√2sin∠C. If sin^2∠A=ab, where a and b are coprime positive integers, what is the value of a+b?
asked by rita 
science
If an airplane directly north at 2000 km/hr and there are 50 mph/hr winds blowing west. whis is the actual path of the plane seen from someone on the ground? What is the ground speed of the plane in mph?
asked by janaki 
PHYSICS
Estimate the length of venusian year using the fact that the earth is 1.49*10'8km and venus is 1.08*10'8km from the sun on average.
asked by JOY 
physics
Alice has a very important piece of information, which is encoded as an integer k. She is storing this number in a quantum state ψ⟩=∑xαxx⟩ of n qubits in such a way that if you apply QFT2n to ψ⟩ and then measure in the standard basis, you get
asked by s 
physics
In Problems 15, we will work through an example of QFTM for M=6 What is ω? You can use e, pi, and M in your response. Please do not subtitute 6 for M. What is QFT6 of 12√(0⟩+3⟩)? Specify the probability amplitudes. You should use w to denote ω,
asked by s 
math
imgur[dot]com/jpORgtf This is wayy to hard to type. What is the simplification of this question. Thanks.
asked by Adam 
guilan
1Use Taylor series expansion (degree 0 to 6) about x’=pi/4 to find an approximation for f(x) = cosx at point x=pi/3 and then compare the result with the exact data.(show the results in a table).
asked by payam 
English
What is Positive Adverbs
asked by Jeff 
maths
Given the the instantaneous voltage across a capacitor is VC=40(1e t/CR) Volts When being charged by a 40 volt DC supply, find the time, t for VC to reach 18 volts after the charging process has started if C = 100ìF and R = 20kÙ
asked by Rachael 
Indian Removal act question
How much was Andrew Jackson going to pay the indians if they left their land
asked by Mr.Brain 
Math, Algebra
Solve for y: 5x+7y=23
asked by Faye 
Life Orientation
What are the environmental health hazards that cause ill health,accidents,crises,and disasters within my community or any other community within south africa and globally and a good describtion of each
asked by Karabo 
Chemistry
How many liters of ammonia gas can be formed from 11.3 L of hydrogen gas at 93.0 C and a pressure of 42.4 kPa?
asked by Venus 
Fundamentals of
OBSERVATION REPORT PROJECT of earlly child hold
asked by Anonymous 
Forces (Science)
Describe 2 contact and 2 noncontact force examples. Please and thank you very much. :)
asked by Angie 
English
A diagram showing the relationships among concepts and ideas used for organizing information is called: A. visualization. B. concept map. C. outline. D. organizational chart. is it C
asked by Amy 
calculus
Find dy/dx. y^3 = 8x^3 + 4x
asked by akash 
Psychology/Math
What are significance/alpha levels and how does using a one versus a two tailed test affect significance levels?
asked by Carson 
Science 8th grade
what gets hot and cold faster, solid or gas and why?
asked by Anon 
Psychology/Math
What are significance/alpha levels and how does using a one versus a two tailed test affect significance levels?
asked by Carson 
Science
Are compounds chemical or physical changes of matter?
asked by Anon 
maths
eight into the power fi ve over seven divide by three into the power five over fourteen
asked by tlou lucy 
Chemistry
A tank contains exactly 10^(6)liters of pure water. 1.0*10^(6) moles of HCl (g) is bubbled into this tank. What is the resulting pH? The answer is 7, but I was only able to deduce that based on the fact that water has a neutral pH, but there's a
asked by Jonah 
douglass
which is a typical behavior of a successful interviewee?
asked by sandra 
Energy Transfer and Heat flow
1. What is entropy? 2.With every energy transfer, what form of energy is always released? I think 2 is Heat?
asked by Stephanie 
physics
A birthday candle 4 cm high is 10 cm from a converging lens whose focal length is 15cm. Use a ray diagram on a suitable scale(say,1/3 full size) to find the location of the image, its height,and whether it is erect or inverted, real or virtual.
asked by Susan 
Chemistry;HELP
How would you do this problem? /: 1. Calculate the density of a material that has a mass of 52.497grams and a volume of 18.5cm^3?
asked by Unknown 
mathsbinomial theorem
coefficient of x^39 in the expansion of [(1/x^2) + x^4)]^18
asked by anoynomous 
Math
Solve equation. 5(s7) = 15
asked by Cherie 
statistics
two spot available and there is 6 men and 4 women what is the probability that a women will be picked?
asked by justin 
chemistry
how many phases do suspensions have?
asked by m1m2m3m4 
Math?
How do you convert "ml" to grams. 1. 135.0ml to grams
asked by Unknown 
Math
I've read over it, but I still don't understand how to add together bulbs from the Mandelbrot sets. Please help? I need to know how to add the 1/4 bulb to the 1/6 bulb and the 1/8 bulb to the 1/6 bulb. Thank you!
asked by Sam 
Math
What is the mathematical expression for 80 is 20 times as many as 5?
asked by Zack