Questions Asked on
April 14, 2013

chemistry
Write the equations describing the electrode reactions and the net cell reaction for this electrochemical cell containing indium and cadmium: This is what I have so far: anode: In(s) > In^3+ + 3e cathode: Cd^2+ + 2e > Cd (s) Need help writing the
asked by Lexi 
chemistry
A voltaic cell that uses the reaction Tl3+(aq) + 2 Cr2+(s) ¨ Tl+(aq) + 2 Cr3+(aq) has a measured standard cell potential of +1.19 V. determine E‹red for the reduction of Tl3+(aq) to Tl+(aq).
asked by sarah 
Physics
A transistor radio operates by means of a 9.0 V battery that supplies it with a 40 mA current. (a) If the cost of the battery is $0.50 and it lasts for 300 h, what is the cost per kWh to operate the radio in this manner? (b) The same radio, by means of a
asked by Billy 
PSYCHOLOGY
Sara, a lifelong ballet student, reports she feels like she does not want to participate in ballet anymore. She also states she is tired and cannot seem to get enough sleep. Bipolar disorder Generalized anxiety disorder ObsessiveCompulsive disorder Major
asked by CURIOUS GIRL 
Math
From a survey of 100 college students, a marketing research company found that 60 students owned iPods, 50 owned cars, and 20 owned both cars and iPods. (a) How many students owned either a car or an iPod (but not both)? 1 students (b) How many students do
asked by Denise 
Math
Let R1 and R2 be the remainders when polynomials x^3 + 2x^2  5ax  7 and x^ 3 + ax^2  12 x + 6 are divided by ( x + 1 ) and ( x  2 ) respectively. If 2R1 + R2 = 6, find a. Please work the complete solution.
asked by Steve 
Calculus
A balloon leaves the ground 500 feet away from an observer and rises vertically at the rate of 140 feet per minute. At what rate is the angle of inclination of the observer's line of sight increasing at the instant when the balloon is exactly 500 feet
asked by Gabby 
pre calc
Find all solutions of the equation 3sin^2 x 7sin x +2 = 0 in the interval [0,2pi). The answer is x_1= ?? and x_2= ?? with x_1
asked by james 
chemistry
The escape velocity from earth is 2.5 x10^4 miles per hour. What is this speed in m/s? (1 mile 1609 m)
asked by Nancy 
statistics
Find the standard deviation, Sigma, for the binomial distribution which has the stated values of n and p. Round your answer to the nearest hundredth. n = 639; p = 0.7
asked by todd 
sciology college course
1. A dad holds five coins in his hand. He tells his son that if he can guess the amount of money he is holding within 5% percentage error he can have the money. The son guesses that he is holding 81 cents. The dad opens his hand and displays 90 cents. Did
asked by sucker 1 
Physics
A circuit contains six 270 lamps and a 18.0 heater connected in parallel. The voltage across the circuit is 120 V. (a) What is the current in the circuit when four lamps are turned on? (b) What is the current in the circuit when all lamps are on? (c) What
asked by Billy 
Chemistry
In which case is heat involved: mixing 100.0g samples of 90'C water and 80'C water or mixing 100.0g samples of 60'C water? assume no heat is lost to the environment. please help thanks.
asked by Perrie E. 
accounting
The cash payments journal used in this problem has only three special amount columns. Under what circumstances would you recommend that additional special amount columns be added to a cash payments journal?
asked by Jady 
Applied Calculus
The world population at the beginning of 1990 was 5.3 billion. Assume that the population continues to grow at the rate of approximately 2%/year and find the function Q(t) that expresses the world population (in billions) as a function of time t (in
asked by Jacob 
Physics
A rotating uniformdensity disk of radius 0.6 m is mounted in the vertical plane. The axle is held up by supports that are not shown, and the disk is free to rotate on the nearly frictionless axle. The disk has mass 5.8 kg. A lump of clay with mass 0.5 kg
asked by Emily 
Alg 1
Completing the square: Which of the following is a solution x^2 + 14x + 112 = 0? If necessary round to the nearest hundredth. x= 0.24 x= 4.24 x= 4.24 no solution I worked it and got neither of the answers. I got x= 0.9 and x=14.9. Where did I go wrong?
asked by Jane 
math
Triangle ADE is inside rectangle ABCD. Point E is half way between points B and C on the rectangle. Since AB is 8 cm and side AD is 7 cm. 1. what is the area of triangle ADE? 2. what is the ratio of the area of the triangle ABE to the area of triangle ADE?
asked by natalie 
algebra
nico is saving his money for college he invests some money at 8% and $1300 less than that amount of 5% the investments produced the amount of $195 interest in 1 year how much did he invest at each rate?
asked by rebecka 
pre calc
Find all solutions of the equation tan^5 x  9tan x =0. The answer is Ak\pi where k is any integer, the constant A= ??.
asked by tyler 
physics
An elevator has a mass of 500 kg. It may safely carry an additional mass of 1000kg and accelerate upward at 2m/s2. What is the tension in the cable?
asked by becky 
Physics
A device consists of eight balls each of mass 0.4 kg attached to the ends of lowmass spokes of length 1.8 m, so the radius of rotation of the balls is 0.9 m. The device is mounted in the vertical plane. The axle is held up by supports that are not shown,
asked by Emily 
math
A baseball player swings and hits a pop fly straight up in the air to the catcher. The height of the baseball in meters t seconds after it is hit is given by a quadratic function h(t) = −4.9t^2 + 9.8t + 1. What is the maximum height of the baseball?
asked by Anonymous 
Physics
A solenoid is 3.2 m long and has 500 turns per meter. What is the crosssectional area of this solenoid if it stores 0.32 J of energy when it carries a current of 12 A? So I used L = 2*E / I^2; and then I used A = L*l / (uo * N^2) but my answer isn't
asked by Valerie 
physics
The Lshaped object in the figure below consists of three masses (m1 = 8.90 kg, m2 = 1.16 kg and m3 = 2.40 kg) connected by light rods of length L1 = 1.29 m and L2 = 1.86 m.What torque must be applied to this object to give it an angular acceleration of
asked by Anonymous 
PHYSICS
A 40 kg child stand on one end of a 70 kg canoe hat is 4 m in length. The boat is initially 3 m from a dock. The child notcies a turtle on a arock near the far en of the canoe so she proceeds to walk to the far ed off the canoe o get the turtle. a)
asked by y 
english
each of the following sentences as periodic, cumulative, or inverted, and punctuate each correctly. Identify 1. Nowwhen I hadmastered the language of this water and had come to know every trifling feature that bordered the great river as familiarly I knew
asked by Anonymous 
sciology college course
A science teacher tells her class that their final project requires the student to measure a specific variable and determine the velocity of a car with no more 2.5% error. Jennifer and johnny work hard and decide the velocity of the car is 34.87 m/s. The
asked by sucker 1 
math
given the points A(0,0), B(3,1) and C (1,4) what is the measure of angle ABC I plotted it on a gragh and got 1.46 degress. I am unsure if I am doing this question correctly. Or am I misreading it thanks in advance .
asked by Rose 
math
Find all solutions of the equation 3sin^2 x 7sin x +2 = 0 in the interval [0,2\pi). The answer is x_1= ? and x_2= ? with x_1
asked by tyler 
physics
Car A negotiates a curve of 60 m radius at a constant speed of 50 km/h. When A passes the position shown, car B is 30 m from the intersection and is accelerating south toward the intersection at the rate of 1.5 m/s2. Determine the acceleration which A
asked by nelly 
Physics
Define resistivity and state its units
asked by Tobi 
Biology
PLEASE HELP!!!! 1. How many millions of years ago did sharks first appear? (Make sure you are looking for animals that only have cartilage skeletons). 2. How many millions of years ago did bony fish (like the perch) first appear? 3. How many millions of
asked by Kim 
finance
This morning, you purchased a stock that will pay an annual dividend of $1.90 per share next year. You require a 12 percent rate of return and the annual dividend increases at 3.5 percent annually. What will your capital gain be on this stock if you sell
asked by Xuenan Lin 
Chemistry
Calculate the pH of a buffer solution that contains 0.60 M NaH2PO4, and 0.26 M Na2HPO4.
asked by Maddie 
physics
A solid block of mass m2 = 8.3 kg, at rest on a horizontal frictionless surface, is connected to a relaxed spring. The other end of the spring is fixed, and the spring constant is k = 210 N/m. Another solid block of mass m1 = 12.4 kg and speed v1 = 4.9 m/s
asked by Nicole 
U.S/history AP
A)Outspken proponent of women's rights and helped the below women organize the seneca falls convention. B)a prominent advocate of women's rights.She organized the seneca falls convention with the person above.Her husband wholeartedly supported her views
asked by joy 
calculus
8). Part 1 of 2: In the solid the base is a circle x^2+y^2=16 and the crosssection perpendicular to the yaxis is a square. Set up a definite integral expressing the volume of the solid. Answer choices: integral from 4 to 4 of 4(16y^2)dy, integral from
asked by Sally 
chemistry
how would you solve the mass of sucrose, C12H22O11, that is needed to make 550ml of a 0.25M solution?
asked by maggie 
personal finance
Jo owns 150 shares of Delta General stock. She purchased the stock for $24 a share. She sold the stock for $30 per share. The commissions required to buy and sell her stock cost her $120. Assuming that she received no dividends (income) during the time she
asked by morgan 
statistics
An economist wants to estimate the mean income for the first year of work for college graduates who majored in biology. How many such incomes must be found if the economist wants to be 95% confident that the sample mean is within $500 of the true
asked by Panther 
Chemistry #2
If 100.0 g of water at 90'C is added to 50.0 g of water at 10'C, estimate the final temperature of the water. explain your reasoning. please my last question i really don't get it, :/
asked by Perrie E. 
Math
If alpha and beta are the zeros of the polynomial ax^2 + bx + c then evaluateA. (alpha)^2 / beta + (beta)^2 / alpha B. alpha^2 .beta + alpha.beta^2 C. 1/(alpha)^4 + 1/(beta)^4. Please work the complete solution.
asked by Steve 
spanish
que comen las personas en un banquete de quinceanera en peru
asked by Anonymous 
Trigonometry
wheels on a skateboard are 3.63 inches. If the skateboarder is travelling down a hill at 23 miles per hour what is the angular velocity.
asked by Adrian 
Physics
A satellite circling the earth completes each orbit in 5.10 x 10^3 s. What is the gravitational field strength @ the location of the satellite's orbit?
asked by Dal 
Physics
A satellite circling the earth completes each orbit in 5.10 x 10^3 s. What is the gravitational field strength @ the location of the satellite's orbit?
asked by Dal 
chem
If it takes 84.2 min for the concentration of a reactant to drop to 20.0% of its initial value in a firstorder reaction, what is the rate constant for the reaction in the units min1?
asked by ted 
precalculus
A model airplane 50 feet above the ground is flying away from an observer. Find the angle of elevation theta of the plane as a function of the distance from the observer to the plane. What is theta when the plane is 300 feet from the observer?
asked by anonymous 
Physics
A 100 W lamp is connected to 120 V, and its current is measured. A resistor is added to the lamp to reduce the current to half its original value. (a) What is the potential difference across the lamp? (b) How much resistance was added to the circuit? (c)
asked by Billy 
Algebra
Find the distance d(P1,P2) between the points P1 and P2 P1=(1,5);P2=(2,4) d(P1,P2)=
asked by Lauren 
Principal of Math
a tree casts a shadow 29m long. at the same time the shadow cast b a 61cm tall statue is 82cm long. find the height of the tree. round results to the nearest unit.
asked by Christine 
Math
A tower stands on a 20 degree slope. From a point 45 m directly up the slope. The angle of elevation of the top of the tower is 10 degrees. How tall is the tower?
asked by Chelsea 
pre calculus please help
Find all solutions of the equation tan^5 x  9tan x =0. The answer is Ak\pi where k is any integer, the constant A=???
asked by james 
Alg 1
The rectangular has an area of 5400 cm^2. What is the value of w? 5400 = (w)(2w  30) 5400 = 2w^2  30 w 5400 = 2w(w  15) Now I am stuck. My choices are: 45 cm 45 cm 60 cm 90 cm What do I need to do next to get the correct answer? Thanks.
asked by Jane 
Science
Explain why would a bottle that is left overnight with water is crack but a empty bottle would not.
asked by Jess 
Parametric Equations
Find the length of the curve over the given interval: x=t+1 y=ln cos(t) for t=0 > t=pi/4
asked by Elyse 
Life orientation
Ways in which the lack of physical fitness and proper nutrition impacts ön teens
asked by Zandile 
math
a scale model of a building is 8in.by12in.the scale is 1in.by 15ft.what are the dimensions of the actual building
asked by Anonymous 
math
Find all solutions of the equation tan^5 x  9tan x =0. The answer is Ak\pi where k is any integer, the constant A=???
asked by james 
Conversion Math
A dipole of 1 Debye is equal to 3.33 x 10^30 C m . Show that in atomic units 1 D = 0.39345 au.
asked by Taylor 
pre ap physics
A) A small cork with an excess charge of +9.0x10^6 is placed 0.13 m from another cork, which carries a charge of −3.2x10^6. What is the magnitude of the electric force between the corks? The Coulomb constant is 8.98755 × 10^9 N • m^2/C^2. Answer in
asked by keely 
Physics
11098satellite_and_junk.jpg A spherical satellite of radius 4.6 m and mass M = 195 kg is originally moving with velocity vsatellite,i = < 3000, 0, 0 > m/s, and is originally rotating with an angular speed ?1 = 2 radians/second, in the direction shown in
asked by Emily 
Chemistry
What is the PH of a buffer made by adding 8.20 grams of sodium acetate(NaCH3CO2) to 500 ml of 0.10 M acetic acid(CH3CO2H). Ka for acetic acid is 1.8 x 10^5.
asked by Lele 
pre calculus
Simplify and write the trigonometric expression in terms of sine and cosine: ((2+tan^2 x)/(sec^2 x))1 = (f(x))^2 f(x)= ??
asked by james 
Science need help ?????///
An astronomer observes two galaxies, A and B, which have redshifts of: Galaxy A = 0.020 and Galaxy B = 0.010. Which galaxy is closest to us and what is its distance away from us? You may assume that the Hubble constant is H0 = 75 km s–1 Mpc−1 and that
asked by sam 
math
Simplify and write the trigonometric expression in terms of sine and cosine: sin x + (cot x)(cos x) = (1/f(x)) f(x)= ?
asked by tyler 
Chemistry
What is the hydronium ion concentration in a solution 0.150M in HNO2 and 0.300M in NaNO2? Ka = 7.24E4
asked by Alexis 
MATH
Find all solutions of the equation tan^5 x  9tan x =0. The answer is Ak\pi where k is any integer, the constant A=???
asked by james 
Alg 1
A box shaped like a rectangular prism has a height of 17 in. and a volume of 2720 in^3. The length is 4 inches greater than twice the width. What is the width of the box? Please solve and explain what I need to do. The choices are: 10 8 20 40
asked by Jane 
Lifeorientation
Ten(10) ways in which water pollution can impact negatively on one's health.
asked by Koketso 
precalculus
For each of the following determine whether or not it is an identity and prove your result. a. cos(x)sec(x)sin^2(x)=cos^2(x) b. tan(x+(pi/4))= (tan(x)+1)/(1tan(x)) c. (cos(x+y))/(cos(xy))= (1tan(x)tan(y))/(1+tan(x)tan(y)) d.
asked by anonymous 
BIO
3. Fish have a two chambered heart called a single loop. discuss the benefits and drawbacks of this system. 4. Amphibians have a three chambered heart. Discuss the importance of the extra chamber in terms of the obvious physical differences that amphibians
asked by SOMEONE HELP THIS PERSON 
algebra
the elspaso middle school girls basketball team is going from el paso to san antonio for the texa state championship. The trip will be 560 miles. Their bus travels at an average speed 60 miles per hour.
asked by malik 
Math
The mean time to complete a certain stat quiz is 25 minutes, with a standard deviation of 5 minutes. Find the probability of a student taking. 1.) less than 15 minutes. 2.) Between 15 and 25 minutes. 3.)more than 25 minutes.
asked by John 
maths
a dam holds 13.5 megalitres of wate when full. If water flows from the dam at the rate of 5 litres per second, approximately how long will it take to empty the dam.
asked by senorita 
calculus
10). Find the area of the region bounded by the graph of f(x)=4lnx/x, y=0, x=5.8 11). Find the area of the region bounded by x=y^21y, x=0
asked by Sally 
anthropology
Chiefdoms are characterized by all of the following except
asked by ashley 
math
In right triangle ABC, a = 52 ft and c = 63 ft. Which of the following trig ratios of angle B, would combine the given sides?
asked by msmith 
physics
A spring is extended 4mm by an applied force of 2.0N. a)What is its spring constant? b)How much would it extend if a load of 150g was suspended from it?
asked by Tangeni. 
kaplan
Quixote Consulting dustin larkin ratio sheet
asked by Anonymous 
math
Marty walks to school 4 days each week. The walk talks 15 minutes. How much time does it take marty to walk to school & home each week. Is this correct? 15×4=60 it takes him an hour each week
asked by Joe 
geometry
in the diagram below of quadrilateral abcd ac is a diagonal that biscets
asked by lexi 
Math
Find the distance between the points with polar coordinates (3, 120°) and (0.5, 49°)? Is the answer 2.88?
asked by Athena 
math
A fair coin is tossed 10 times. What is the probability of getting exactly 6 heads?
asked by Moyer 
Life orientation
What are the 5 factors contributing to the lack of physical fitness and proper nutrition in the adolescents
asked by Zandile 
math
Suppose you had a slice of pizza that was cut from a 16” pizza. You measure the angle that it was cut at to be 0.6 radians. EXPLAIN how you could find the length of the crust on the slice of pizza. *
asked by Lynn 
Chemistry
radioactive sodium chloride is appropriate for diagnosing circulatory problems, but radioactive xenon is helpful in searching for lung problems. Explain why. I understand different elements are used for specific parts of the body but I don't understand
asked by Sara 
Chemistry
* Fixed Question What is the PH of a buffer made by adding 8.20 grams of sodium acetate(NaCH3CO2) to 500 ml of 0.10 M(molarity) acetic acid(CH3CO2H). Ka for acetic acid is 1.8 x 10^5.
asked by Lele 
Physics
A coil consists of N=10^5 turns of wire wrapped uniformly around a plastic torus. The inside radius of the torus is r0=0.15 m and the outer radius is r1=0.16 m. Thus, each winding has a diameter d=0.01 m. What is the selfinductance (in H) of this coil?
asked by Phy 
principals of math
a triangle drawn on a map has sides of lenghts 7.0 cm, 11 cm, and 15 cm. the shortest of the corresponding reallife distances is 123km. find the longest of the reallife distatnces. round to the nearest unit.
asked by Christine 
English
1. Jenny's family are/is following her. She is taking a walk with her family. 2. Yujin is watering plants with a watering can. Her brother is digging with a trowel. Her father is also watering plants with a watering pot. What is Yujin doing? She is
asked by rfvv 
physics
'a weather station monitors a storm using a radar system. the radio wave pulse emitted is received back at the transmitter after 0.34 ms. the wavelength emitted was 5.6 cm and that received after reflection from the storm was 1 billionth of a meter longer.
asked by mmk 
since and cosine please help me!
Simplify and write the trigonometric expression in terms of sine and cosine: ((2+tan^2 x)(sec^2 x))1 = (f(x))^2 f(x)= ???
asked by tyler 
physics grade 12.
A spring is extended by 4mm when a load of 2.N was applied. a)What is its spring constant? b)How much would it extend if a losd of 150g was suspended from it?
asked by Tangeni. 
precalc
1. A plane is headed at 122 degrees with an air speed of 350mph in a wind that is blowing from 38 degrees. Find the ground speed of the plane and the speed of the wind if the actual flight was at 133 degrees. 2. A plane is heading at 20 degrees at 300mph
asked by sarah 
sine and cosine
Simplify and write the trigonometric expression in terms of sine and cosine: sin x + (cot x)(cos x) = (1/f(x)) f(x)= ?
asked by tyler 
social studies
did germany take over sweden in WW2
asked by noah 
Social studies
Trace the historical origin of social studies in Russia,USA and Brittin
asked by Enoch 
Math
What is 8/9 as a percent, as a decimal, and a decimal rounded to two places?
asked by Emily 
math
Given: f(closure(A)) subset of closure(f(A)) Prove: For any closed set A in Y, f^1(A) is closed in X (AKA f is continuous) X and Y are metric spaces f: X > Y f^1 is f inverse. closure(A) = A U limit points of A The first line is Let C be a closed subset
asked by gemma 
Scoence
Explain why would a bottle that is left overnight with water is crack but a empty bottle would not.
asked by Jess 
Math
Simplify and write the trigonometric expression in terms of sine and cosine: ((2+tan^2 x)/(sec^2 x))1 = (f(x))^2 f(x)= ??
asked by dylan 
U.S/history AP
he War of 1812 also called the second war of American Independence or by its opponents the derisive () . U.S.declared war on Britain because they did not recognize our neutrality and interfered with our freedom of the()shipping My answers are:
asked by joy 
accounting
Rushia Company has an availableforsale investment in the 10%, 10year bonds of Pear Co. The investment’s carrying value is $3,200,000 at December 31, 2010. On January 9, 2011, Rushia learns that Pear Co. has lost its primary manufacturing facility in
asked by Andrew 
Chemistry
If the Kb of a weak base is 1.5 × 10^6, what is the pH of a 0.25 M solution of this base? I found that I need to use the quadratic equation but I'm having difficulties because I come up with taking the square root by zero and that isn't right. Please
asked by Leah 
physics
A spring is extended 4mm by an applied force of 2.0N. a)What is its spring constant? b)How much would it extend if a load of 150g was suspended from it?
asked by Tangeni. 
physics
A thin steel hoop of weight W and radius r starts from rest at A and rolls down along a circular cylindrical surface of radius a as shown in Fig. G. Determine the angle defining the position of point B where the hoop will begin to slip if the coefficient
asked by praveen 
Chemistry
I'm having a little trouble determining oxidation numbers for elements in a redox reaction KMnO4+HCl> MnCl2+Cl2+H2O+KCl So far what I have for the reactants side is: K= +1 Mn= +7 O4= 2 H= +1 Cl= 1 And for the products side I have: Mn= +2 Cl2= 1
asked by K 
Biology
Reptiles and mammals both have a four chambered heart yet reptiles utilize the sun to monitor body temperature while mammals control body temperature internally. What does this mean about the separation of oxygenated (blood that already picked up oxygen
asked by Kim 
chemisty
how many grams of sucrose must be dissolved in 1.5kg of water ot produce a solution which has a freezing point of 2.40 degrees C?
asked by Joan 
Maths
The perimeter of a rectangular wall is 56m, there are 4 circular windows with a circumference of 7,54m each, the wall has 2 standard doors. What is the length and the width of the wall?
asked by Lubeth 
algebra
i WAS TRYING TO FIGURE OUT HOW TO GET THE LENGTH OF A SIDE OF A CUBE WHEN THE VOLUME IS 800CM^3
asked by tara 
algebra
what is the value of the expression 2xsquare+3xy4ysquare when x=2 and y =4?
asked by Hipolito 
cosine and sine HELP!
Simplify and write the trigonometric expression in terms of sine and cosine: ((2+tan^2 x)(sec^2 x))1 = (f(x))^2 f(x)= ???
asked by tyler 
Histroy
Once they arrived in the United States, immigrants experienced a life very different from what they imagined. Which was not something that was most immediately part of their experience? (Points : 1) Labor scams Low skilled work Religious tolerance
asked by John 
math
On an air track, a 403.0 glider moving to the right at 1.70 collides elastically with a 500.5 glider moving in the opposite direction at 3.00 . 1. Find the velocity of first glider after the collision. 2. Find the velocity of second glider after the
asked by Wesley 
Precalculus
Solve the equation 2sin^2(theta)+3sin(theta)+1=0 for theta.
asked by anonymous 
Teaching techniques
Which learning technique is frequently used in the expository model of teaching?
asked by Cam 
Chemistry
What volume of H2(g), stored at 26°C at a pressure of 141 atm, would be needed to run an electric motor drawing a current of 8.4 A for 4.8 h?
asked by Joe 
Math
Null factor law and factoriising: 2x^2+7x=0 X(2x+7)=0 X=0 or 2x+7=0. ( the answer in the book was x=7/2, how? And. X^24=2x4 Is it x^242x+4=o ??? If so!' how do I continue?
asked by Sally 
Science
If rocket had been 10 m above the ground when its horizontal distance from the launchpad was 2m ,wheredo you think rocket would have landed?
asked by Akhilesh 
science
Why is it difficult to distinguish between some pure substances and solutions? What methods can overcome this to define if either it is a pure substance or solution?
asked by Sunny 
science help plzzzzzzzzzzzzzzz?
What is the mean photon energy of.......? During the history of the Universe from the Big Bang to the present day, at some point in time the mean temperature of the Universe was 1 × 10^17 K. What was the mean photon energy at this instant, and which of
asked by centya 
Physics
Consider the RL circuit shown in the figure, where R = 5.0 Ω and L = 4.6 H. How much energy is stored in the inductor after the switch has been closed a long time? I would know how to do this if they actually gave me a value for time, but I'm lost now.
asked by Valerie 
pre calculus
Simplify and write the trigonometric expression in terms of sine and cosine: sin x + (cot x cos x) = 1/(f(x) f(x)= ???
asked by james 
Find the equation....
Find the equation with the given properties. Express the equation in slope intercept form. Containing points p=(4,2) and Q=(2,1) What is the equation of the line? y=
asked by Lauren 
english
ana wants to write a descriptive essay about a place tha is important to her 1which of these would best help ana prepare to write aboute her plkace areading stories about places she has not visited bclosing her eyes, picturing her place and listing
asked by jake plzzz 
chemisrty
how many ml of a .1M HCl are required to react completely with 1 gm mixture of Na2CO3 ?
asked by swati 
calculus
5). Find the volume of the solid of revolution generated by rotating the graph of y=8 lnx about the yaxis between y=0 and y=16 Answer choices: 238.39pi, 246.39pi, 230.39pi, 214.39pi, 222.39pi 7). Find the area of the region bounded by y=√x2, y=9, y=0,
asked by Sally 
Maths
Solve for the value of x: 6log(x^2+1)x=0
asked by Seth 
math
Write an expression for the coefficient of x^997 in (x+1)^1008. Find its value.
asked by Moyer 
Chemistry
The question I am having trouble with is: Scientists originally were uncertain whether the oxygen gas produced during photosynthesis came from CO2, H2O, or from both. How could radioisotope tracers be used to settle that question?
asked by Madison 
physics
An 8.0 Ω resistor and a 4.0 Ω resistor are connected in series with a battery. The potential diﬀerence across the 4.0 Ω resistor is measured as 9 V. Find the potential diﬀerence across the battery.
asked by Sara 
Math
A dipole of 1 Debye is equal to 3.33 x 10^30 C m . Show that in atomic units 1 D = 0.39345 au.
asked by Adam 
physics
A 22.0 Ω, 11.0 Ω, and 6.00 Ω resistor are connected in parallel to an emf source. A current of 6.00 A is in the 11.0 Ω resistor.What is the potential diﬀerence across the source? Answer in units of V
asked by Sara 
English
I have to write an Prospectus and Annotated Bibliography essay. But I don't know how to do that, can anyone explain what to do for me?
asked by Colby 
anatomy
This structure increases the surface area of the interior wall of the small intestine
asked by sue 
Calculus
The present value of a building in the downtown area is given by the function p(t) = 300,000e^0.09t+(t)/2 f or 0 _< t _< 10 Find the optimal present value of the building. (Hint: Use a graphing utility to graph the function, P(t), and find the value of t0
asked by Deeno 
science
you run 100m in 25's. if you later run the same distance in less time , does your average speed increase or decrease? explain.
asked by karen 
Psychology
I'm doing the classic experiment on "reaction time: male vs. female. " The test involve dropping a ruler and see where the subject catches it. The problem is that If i was the one to drop the ruler, depend on the subject being male or female, it would
asked by Mina 
Math
cos22.5=1/2 sqrt(A + sqrt B)
asked by Raquel 
statstics
construct a 90 confidence interval for the population mean ÃŽ¼. assume the population has a normal distribution. A sample if 15 randomly selected math majors has a grade point average of 2.86 with a standard deviation od 0.78. Round to the nearest
asked by Anonymous 
science
how does thee sun affect large scale convection in the atmosphere?
asked by kandybear6464 
Chemistry
What volume of 0.105 M(molarity)is needed to completely neutralize 25.0 ml of 0.180 M(molarity)HBr according to the equation: KOH(aq)+ HBr(aq)> KBr(Aq)+ H2O(L)
asked by Lele 
Physics
Consider the following circuit. We have R_1=7 Ohms, R_2=17 Ohms, R_3=11 Ohms, V=9 Volts, L=0.09 H. At t=0 the switch is closed. (a)Immediately after the switch is closed, what are currents I_1, I_2, I_3 ? I_1 (b)What are the three currents after the switch
asked by Phy 
Biology
Amphibians have a three chambered heart. Discuss the importance of the extra chamber in terms of the obvious physical differences that amphibians like frogs have from fish.
asked by Kim 
Biology
Fish have a two chambered heart called a single loop. Discuss the benefits and drawbacks of this system.
asked by Kim 
pharmacy math
which would be the most appropriate measuring device for the following prescription: Give 0.7ml of metoclopramide syrup every six hours answer 1 tsp oral syringe with 1 ml marking I am not sure answer Bob help
asked by Fai 
MATH
1 D = 10^18 statC·cm = 10^10 esu·Å = 1⁄299,792,458×10^−21 C·m ≈ 3.33564×10^−30 C·m ≈ 1.10048498×1023 ≈ 0.393430307 au A dipole of 1 Debye is equal to 3.33 x 1030 C m . Show that in atomic units 1 D = 0.39345 au. The above is the
asked by Taylor 
Physics
On an air track, a 403.0 glider moving to the right at 1.70 collides elastically with a 500.5 glider moving in the opposite direction at 3.00 . 1. Find the velocity of first glider after the collision. 2. Find the velocity of second glider after the
asked by Wesley 
math
three of four numbers have a sum of 22. if the average of the four number is 8, what is the four number
asked by Hipolito 
precalculus
Find all solutions for the equation 3cos(x)=cot(x). When do I use +2kpi? Is it only when I'm suppose to "find all solutions"? I got sin(x)=1/3. Is that correct?
asked by marie darling 
arithmatic
three of four numbers have a sum of 22. if the average of the four number is 8, what is the four number
asked by Hipolito 
science
how does convection in the atmosphere create surface ocean currents?
asked by kandybear6464 
L.O
Ten ways in which floods can impact negatively on one's health?
asked by Anonymous 
probability
A computer has 12 hard drives. The probability that an individual hard drive fails within one year is .25. What is the probability that the system will have exactly 4 failures in one year?
asked by Anonymous 
Algebra
Find the equation with the given properties. Express the equation in slope intercept form. Containing points p=(4,2) and Q=(2,1) What is the equation of the line? y=
asked by Jenn 
economics
Calculate the percentage return on the security if the payoff to the security in one year is $1,000, ... security in one year is $1,000, $1,500, $2,000, or $2,500.
asked by cheryl 
calculus
3). The shaded region is bounded by the yaxis and the graphs of y=1+√x, y=2. Find the volume of the solid obtained by rotating this region around the xaxis. Answer choices: 7/6pi, 4/3pi, 11/6pi, 5/3pi, 13/6pi, 5/6pi 4). Find the area of the region
asked by Sally 
algebra
In the early months of some year, one site added 0.6 million new accounts every day. at this rate, how many days would be needed to add 30 million new accounts?
asked by nancy 
psychology
Perceptions are linked to sensations. what happens when we get overloaded from our senses and how would that overload impact perceptions?
asked by slomomo 
L O
Recommendations on how to address HIV/AIDS
asked by Vhugala 
chemistry
how do I carry out qualitative analysis on (NH4)2SO4.FESO4.6H20
asked by john manuel 
Life orientation
Which institution or organisation involved in supporting or giving redress to substance abuse?
asked by Vhugala 
Chemistry
If the pressure is 10.0 atm, what is the temperature? If a 2.53L container is filled with 169 g argon
asked by Tonya 
arithmetic
play 160 games and won 60% how many games did the team win
asked by Hipolito 
Math
Graph y = ½ x^2 – x +3 for 0≤x≤6 Calculate the mid ordinates for 5 strips between x = 1 and x 6, and hence use the midordinate rule to approximate the area under the curve between x = 1, x = 6 and the x axis. assuming that the area determined by
asked by Anonymous 
English
1.If she were or was Please explain the rules. 2. When do you use can not and cannot or everyone and every one? Rules?
asked by Anonymous 
tax accounting
purchased a bond on August 15, 2012 for $2,100. $200 of the purchase price represented accrued interest. She received $210 in interest income on the bond on December 1, 2012. What is the proper treatment of the $210 interest income for federal income tax
asked by tim 
english plzzzzzzzzz helppppp
1The people i love the best 2jump into work head first 3without dallying in the shadows 4and swim off with sure strokes aost out of sight 5They seem to become natives of that element 6the black sleek heads of seals bouncing like halfsubmerged balls 7 i
asked by jake plzzz 
algebra
(3x2y)square=?
asked by Hipolito 
english plzzzzzzzzz helppppp
1Our small community hasn't never had so many choices of bicycle shops. aOur small community has hardly never had so many choices of bicycle shops. bOur small community has never had so many choices of bicycle shops. cOur small community hasn't hardly
asked by jake plzzz 
englsih
Usually, the koi pond is quiet, a lovely place for daydreaming or planning. 22Nature gives us many gifts, but this one is nice. As i breathe in the sweet air and absorb the appearance of the area, I relax.My senses are keen and filled with a variety of
asked by jake plzzz 
life orientation
what can thembi do to deal with the unethical behavior
asked by feli 
college english
my professor want's us to write an abstract proposal on our reserch topic " Is our food safe to eat?" BUT we did not write our papers yet,so can someone help me how to set it up
asked by aleksandra 
math
Bill sees that the shadow of a flag pole is about four times as long as his shadow. If Bill if about 5 1/2 feet tall, about how tall is the flag pole?
asked by Anonymous 
math
Can a right triangle have sides of length 1, 7, and 5 to the square root of 2? Justify your answer.
asked by Anonymous 
english
Her gaze was a laser to his heart this metaphor means that agrandmother was trying to scare him bgrandmothers stare made him feel guilty cgrandmothers look gave him a heartburn dgrandmother stared directly at his chest 1c or d
asked by Anonymous 
accounting
Hillsborough Co. has an availableforsale investment in the bonds of Schuyler with a carrying (and fair) value of $ 85,540. Hillsborough determined that due to poor economic prospects for Schuyler, the bonds have decreased in value to $ 59,710. It is
asked by Andrew 
Math
28a^11b^7/4a^3b
asked by Gina 
Find the distance
Find the distance d(P1,P2) between the points P1 and P2 P1=(1,5);P2=(2,4) d(P1,P2)=
asked by Kayleigh 
HSS
How the Swahili language came being
asked by sethabile 
Calculus
Find the derivative of y = (e^xe^x)/2
asked by Nuru 
government
The "long tail" is a phenomenon related to
asked by Anonymous 
English
1. He is riding a roller board. 2. He is in the air on the roller board with his arms spread in the picture. 3. Talk with your partner and check the Yes box if your partner likies the activity. If your partner doesn't like the activity, check the no box.
asked by rfvv 
Biology
Dinosaurs were reptiles that grew to enormous sizes. What may an evolutionist hypothesize about the oxygen content of the environment during the age of dinosaurs?
asked by Kim 
Biology
Dinosaurs were reptiles that grew to enormous sizes. What may an evolutionist hypothesize about the oxygen content of the environment during the age of dinosaurs?
asked by Kim 
english
irony agrandma doesnt believe her grandsons story bschoo lpricipal sees a student break into a locker cperson !@#$%^&claims an item from a thief is accused of stealing dperson who loses something doesnt want it back 1d then c
asked by Anonymous 
english
Her gaze was a laser to his heart this metaphor means that agrandmother was trying to scare him bgrandmothers stare made him feel guilty cgrandmothers look gave him a heartburn dgrandmother stared directly at his chest 1b
asked by Anonymous 
social studies
NEED HELP ON THIS QUESTION Discuss the relation of democracy to globalization. What, in your view, does the future hold in this regard?
asked by lilly 
math
form the quadratic equations whose roots are(A:5 and 1/3
asked by pressly. 
calculus
Find the length of the curve over the given interval: x=t+1 y=ln cos(t) for t=0 > t=pi/4
asked by Liz 
commerce
identify and describe three environmental health hazards that cause illhealth,crises and disasters
asked by nobuhle gwegwana 
philosphy
I am to draft a six to eight page paper based upon a life changing decision that I or someone in my community had to make. I am considering writing about returning back to school but I am stuck on how to get started. Can someone please help.
asked by angela 
precalculus
Solve the equation cos(2x)cos(x)+sin(2x)+sin(x)=1 for all values of x.
asked by marie darling 
Math
The minute hand is 12 feet long, but the clock face is 22 feet in diameter. If the minute hand were twice as long, how much farther would it travel every hour?
asked by Gingercorb 
arithmatic
forty six point two multiply by ten minus square
asked by Hipolito 
chemistry
hey guys please help me answer these questions. 1. can a strong acid be diluted. explain in detail 2. can a weak acid be diluted. explain in detail 3. how does your observation of sunlight change when you place two different concentrations of food colored
asked by sean wilson 
math
Will someone please help me with this problem. Simplify by factoring. ã250
asked by Michael 
pre calc
C0rr missi0n kill name id real name die
asked by Anonymous 
physics
Hm0 dug b00b pass taik pay 0ff.blue medcare x x1234567.sead h0sp.c0rr c0urt p0lice 0rder uint die c0de c0rr bylay
asked by Anonymous 
math
marcus scored 23 points in his basketball game on friday and 19 points in his basketball game on saturday.how many points did marcus score in two games
asked by akiya 
English
1.If she were or was Please explain the rules. 2. When do you use can not and cannot or everyone and every one? Rules?
asked by Anonymous 
math
Will someone please help me solve this problem. Simplify by factoring. ã250 this is a radical sign in front of 250.
asked by Michael 
Java programming
can anybody help me.. Multidimensional Array Use a twodimensional array (for example of 3 by 3) to simulate the addition operation of two matrices. Sample output: the first matrix: 1 2 3 1 0 1 1 2 1 the second matrix: 1 1 1 2 2 2 3 3 3 The total of two
asked by noh 
math
Let 2^a = 5 and 2^b = 7. Using exponent rules, solve the equation in terms of a and b. 0.4^x = 343
asked by emily 
social studies
NEED HELP ON THIS QUESTION Globalization can be understood in terms of shifts in a series of domains. Discuss in relation to i) culture and ii) the state. What in your view, does the future hold in this regard?
asked by lilly 
Math 112 Help please
How do I break these down to find out which one is the largest without using a calculator their fraction. a. 13,579 + 1/2468 b. 13,579  1/2468 c. 13,579 * 1/2468 d. 13,579/ 2468
asked by Enis 
arithmetic
which of the following is the leas0. 0.015 0.105 or 0.15
asked by Hipolito 
physics
A 46.7g golf ball is driven from the tee with an initial speed of 55.5 m/s and rises to a height of 25.9 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest point. (b) What is its speed when it is 5.85 m below its
asked by Anonymous 
Quantum/inorganic chemistry
c. Which of these electron configurations has the 4F term symbol for its ground state? p3 d3 d4 f2 f3
asked by Adam 
Life orientation
In 1015 lines critically discuss 5 ways in which the human or enviromental problem impacts on the community
asked by Shudufhadzo 
french
caroline apprend a nager elle prend des lecons de
asked by eric 
Physics
150kg cart is traveling right 3m/s. a 20kg block of coal comes from the cart at 38degrees below the horizontal. The new velocity of the cart with the block is 3.95m/s. What is the initial speed of the coal.
asked by Frustrated 
Chemistry
how to find the mass of the substance if the only given is the molar mass???
asked by JJD 
Elementary algebra multiple choice
2x^2+3xy4y^2= (A) 9x^24y^2 (B)9x^2+4y^2 (C)9x^2+4y^26xy (D)9x^2+4y^212xy
asked by Hipolito 
physics
Hm0 dug b00b pass taik pay 0ff.blue medcare x x1234567.sead h0sp
asked by Anonymous 
Parametric Equations
Find the length of the curve over the given interval: x=t+1 y=ln cos(t) for t=0 > t=pi/4
asked by Liz 
Biology
Dephosphorylation in the transuction process needs: A) protein kinases B) protein phosphatases C) single sugar like glucose D)cabohydrate
asked by Molly 
calculus
Find the length of the curve over the given interval: x=t+1 y=ln cos(t) for t=0 > t=pi/4
asked by Sarah 
Java programming
â€“ One Dimensional Array Consider this example problem: You are given 7 quiz scores of a student. You are to compute the final quiz score, which is the sum of all scores after subtracting the lowest one. For example, if the scores are 8 7 8.5 9.5 7 5
asked by noh 
JAVA PRoblem
In an Array, how to limit the values that are inputted by the users from the keyboard??
asked by phyton 
college math
4. Do the indicated operations. A) 3 B) –13 C) 5 D) –11
asked by rolitha 
Math
If (Y x 15+20=245), what does Y equal?
asked by Daniel 
arithmetic
which of the following is the least
asked by Hipolito 
english
dialect is used to astablish setting and character bdescribe the atmosphere csupport the main idea dhelp readers visualizwe events mi 1st answer is d then a
asked by Anonymous 
Math
What is 5 to the square root of 2?
asked by Anonymous 
english
if a free verse peom has alliteration does that mean it has rhyme
asked by jake plzzz 
English
Posted by rfvv on Sunday, April 14, 2013 at 3:50pm. 1. He is riding a roller board. 2. He is in the air on the roller board with his arms spread in the picture. 3. Talk with your partner and check the Yes box if your partner likies the activity. If your
asked by rfvv 
maths
Hannah has a balls.4/5 is a black balls while the remaining 35 is a red balls.how many more black balls does hannah have...thanks!
asked by nimie 
college math
5u+2v=15 3u+v=8 Im not sure how to do this problem
asked by carrie 
english
free verse poem ahas simple rhyme pattern bis written in dignified launguage cis usually a long narrative peom ddoesnt have a regular rhyme scheme 1d
asked by jake plzzz 
arithmatic
forty six . two multiply by ten minus square
asked by Hipolito 
maths
whats a number to the power
asked by Anonymous 
Maths calculus
Evaluate f'(1) if f(x) =(7x+1)^2
asked by Shudufhadzo 
english plzzzzzzzzz helppppp
which word comes from a latic word meaning right or law alecture bjustice clevel djacket 1b
asked by jake plzzz 
pre+calc
C0rr+missi0n+kill+name+id++real+name+die
asked by Anonymous 
english
ms sue can u plzzz check my 1nd answer
asked by jake plzzz 
math
f(x,y)=square root x^2+y^2
asked by dino 
math
y/9=5/3
asked by Tina 
english
cavernous means asmall bhuge celegant dconfined 1b
asked by Anonymous 
english
should religious phares be taken out of money for a reasearch paper
asked by amber