Kai
Most popular questions and responses by Kai
physics
an antifreeze solution is made by mixing ethylene glycol (density= 1116 kg/m^3) with water. suppose that the specific gravity of such a solution is 1.0730. assuming that the total volume of the solution is the sum of its parts, determine the volume
asked on November 20, 2010 
Chemistry
A hydrate of copper (II) sulfate with formula CuSO4.xH2O has a molar mass of 250.0 g/mol. 2.545 g of hydrate is heated and 63.85% of the residue is found after heating. a) Determine the value of x in the formula of the compound b) What is the molecular
asked on June 17, 2017 
Algebra 1
Question: The height in feet above the ground of an arrow t seconds after it is shot can be modeled by y = 16t(squared) + 63t + 4. Can the arrow pass over a tree that is 68 feet tall? Explain. Completely lost, could anyone help me out?
asked on February 28, 2011 
chemistry
When a 8.45mg sample of a compound containing carbon is burned completely, 18.1 mg of carbon dioxide is produced. What is the mass percentage of carbon in the compound?
asked on March 12, 2017 
Math (Basic)
"A woman earns 10.00 per hour at her job, but if she works more than 20 hours in a week she is paid 1.5 times her regular salary for the overtime hours worked. One week her gross pay was 275. How many overtime hours did she work that week? Express your
asked on June 24, 2011 
Chemistry
Liquid octane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water. Suppose 5.71 g of octane is mixed with 5.0 g of oxygen. Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction. Be sure
asked on October 24, 2018 
Math 11
Express the following in completed square form: y = (2x)^2 + 14x  11 Please show the work because I do not understand it.
asked on March 9, 2019 
Science
What fraction of the thickness of the thickest continental crust is the thickness of the oceanic crust? Give your answer as a reduced fraction.
asked on November 27, 2012 
math
julia wants to make 8 bows using 18 feet of ribbon.she wants to use an equal length of ribbon for each bow with no ribbon left over.how many feet of ribbon can she use for each bow?
asked on October 8, 2015 
Precalc
An investment of $37,000 was made by a business club. The investment was split into three parts and lasted for one year. The first part of the investment earned 8% interest, the second 6%, and the the third 9%. Total interest from the investments was
asked on November 28, 2012 
AP Chem
The heat of combustion of octane (C8H18) is 47.8 kJ/g and one gallon of C8H18 has a mass of 2620 g. If a car using octane is driven 10,000 miles in one year and gets 25 miles per gallon of octane, what is the total energy consumption? 1. 5.01 × 107 kJ 2.
asked on November 14, 2010 
Chemistry
Compound has a molar mass of 283.89 g.mol^1 and the following composition: Phosphorus: 43.64% Oxygen: 56.36% Write the molecular formula of X.
asked on December 17, 2018 
Physics
During launches, rockets often discard unneeded parts. A certain rocket starts from rest on the launch pad and accelerates upward at a steady 3.50 m/s^2. When it is 255 m above the launch pad, it discards a used fuel canister by simply disconnecting it.
asked on July 13, 2011 
Chemistry
Oxygen gas may be prepared by decomposing hydrogen peroxide, h2o2, using manganese (IV) oxide catalyst: 2H2O2(liquid) > 2H2O(liquid) + O2(gas) Calculate the amount of oxygen that will be produced from 1.35 moles of H2O2 Determine the mass of oxygen gas
asked on December 5, 2014 
AP Chem
What energy change is associated with the reaction to obtain one mole of H2 from one mole of water vapor? The balanced equation is 2 H2O(g) > 2 H2(g) + O2(g)and the relevant bond energies are HH : 436 kJ/mol; HO : 467 kJ/mol; OO : 146 kJ/mol; O=O : 498
asked on November 15, 2010 
AP Chem
What energy change is associated with the reaction to obtain one mole of H2 from one mole of water vapor? The balanced equation is 2 H2O(g) > 2 H2(g) + O2(g)and the relevant bond energies are HH : 436 kJ/mol; HO : 467 kJ/mol; OO : 146 kJ/mol; O=O : 498
asked on November 15, 2010 
english
In Katherine Mansfield’s short story “At the Bay,” which character is a foil to Stanley as he is introduced? A. the shepherd B. Jonathan C. Beryl D. Alice E. Linda
asked on February 25, 2019 
Chem
The heat of combustion of octane (C8H18) is 47.8 kJ/g and one gallon of C8H18 has a mass of 2620 g. If a car using octane is driven 10,000 miles in one year and gets 25 miles per gallon of octane, what is the total energy consumption? 1. 5.01 × 107 kJ 2.
asked on November 14, 2010 
English
Which line is most significant in developing the epiphany in this passage? A. “He was conscious of, but could not apprehend, their wayward and flickering existence;” B. “He watched her while she slept as though he and she had never lived together as
asked on February 25, 2019 
Math, slope
The cost of a taxi ride is $5.00 plus $0.75 for every 0.5 km. Graph this relation Identify the slope and the vertical intercept of the line. What do the represent? Write an equation relating the cost and the distance traveled. I'm not sure how I was
asked on April 4, 2017 
english
Which statement best describes the significance of the setting in James Joyce’s short story “Eveline”? A. The story offers a defense of Irish nationalism in the face of British persecution.* B. The story depicts World War I’s destabilization of
asked on February 25, 2019 
Accounting
The Divine Merchandising Corporation began March operations with merchandise inventory of 6 units, each of which cost $27. During March, Divine Merchandising made the following purchases: (1) March 4, 12 units @ $28 per unit, (2) March 15, 18 units @ $30
asked on April 8, 2013 
Physics
A 5.0 Ω resistor, a 9.0 Ω resistor, and a 10.0 Ω resistor are connected in parallel across a 24.0 V battery. What is the equivalent resistance of the circuit? Answer in units of Ω
asked on February 19, 2013 
Global
How did peter the great increase his power
asked on June 4, 2019 
math
There are two containers of milk. There is twice as much milk in the first container as in the second. After using 2 gal. of milk from the second container and 3 gal. of milk from the first container, the second container had 4.5 times less milk than the
asked on October 10, 2018 
physics
The mass of a pendulum moves a total horizontal distance of 14cm in one cycle. What is the amplitude of the vibration?
asked on December 2, 2014 
algebra
a ball is thrown downward from the too of 110 ft bldg with an initial velocity of 14ft per second. the height of ball h after t seconds is given by the equation h = 16t^214t +110. how long after ball is thrown will it hit the ground
asked on December 15, 2011 
behavior problem (dogs)
please check my answer thanks Your friend owns a young Beagle. Her complaint is that the dog is a slave to his nose and he rarely pays attention to anything other than following a scent. She would like your help in obedience training and behavior
asked on October 6, 2008 
math
find the smallest angle of this pentagon x, x15, x50, x30, x40
asked on November 7, 2017 
Math help please
here are 7 pencils and 9 pens in Jack's pencil case. Represent the number of pens to the number of pencils as a ratio.
asked on February 2, 2016 
math
Translate the following argument into symbolic form and determine wheter it's logically correct by constructing a truth table. If the team wins, then the team remains in the playoffs. If the team stays in the playoffs, then the championship is within
asked on December 11, 2012 
behavior problems (dogs)
Please check my answer thanks The problem with "quick fix" corrections designed to eliminate one specific behavior is that the A. dog may not respond to the correction. B. dog may be frightened by the correction. C. owner may be unable to utilize the
asked on October 6, 2008 
behavior problems (dogs)
please check my answer thanks An unwanted behavior persists because the A. behavior elicits a reward. B. dog has a temperament fault. C. trainer doesn't use treats as rewards. D. owner doesn't know how to punish the dog effectively. I picked A
asked on October 6, 2008 
English
Come, brothers all! Shall we not wend The blindway of our prisonworld By sympathy entwined? Shall we not make (5) The bleak way for each other’s sake Less rugged and unkind? O let each throbbing heart repeat The faint note of another’s beat To lift a
asked on September 4, 2018 
math
How many times as great as 15^9 is 15^10 ?
asked on February 7, 2015 
Math
(1/9)x^3+67 at x=9 Is the answer 148 Please help
asked on December 6, 2012 
math
Correction of problem submiited earlier. The amount P of pollution varies directly with the population N of people. City A has a population of 494,000 and produces 260,000 tons of pollutants. Find how many tons of pollution we should except City B to
asked on December 17, 2011 
Physics
I have these two equations that I'm supposed to set equal to each other and find the answer for h which is height for this problem. But I don't think I'm solving it correctly. 0  (h/5) = 1.1(v0)  (1/2)(9.8)(1.1)^2 (v0)^2 = 2(9.8)(h/5  h) My final
asked on July 14, 2011 
Math
what does this derivative mean? (d/dx)(d/dt)(x^2t + t^2x  2x^3)
asked on July 13, 2011 
Science
The ____ of the cell is the control center of the cell.
asked on January 13, 2011 
Chem
What happens when a student cup between trials? What effect will the error have on the calculated value of the delta H of neutralization?
asked on November 9, 2010 
behavior problems ( dogs)
Please check my answer thanks Your new client has a ninemonthold, neutered male Anatolian Shepherd Dog. She would like your help with a behavior problem. Each night, after she lets the dog out to eliminate, he refuses to come back in. She has ended up
asked on October 6, 2008 
behavior problems (dogs)
Please check my answer thanks When a welltrained dog is placed in a stay and ignores a distraction, the dog is showing A. intelligence. B. sociability. C. dominance. D. impulse control. I picked D
asked on October 6, 2008 
behavior problems (dogs)
please check my answer thanks You've evaluated Max, a twoyearold neutered male English Bull Terrier. You found him to be very friendly with humans; he's outgoing and confident. Max is an obedient dog and you anticipate he will do well in training. Max's
asked on October 6, 2008 
Behavior problems (dogs)
Please check my answer thanks A prospective client phones about her dog's behavior problem. When they go for a walk, the dog starts out walking nicely, until it finds an interesting scent. Then the dog stops and refuses to budge. She's a large dog, and the
asked on October 6, 2008 
Science
In the calibration of a calorimeter, an electrical resistsnce heater supplies 80J of heat and a temperature increase of 1.20°C is observed. What is the initial temperature of 8.50g of (C8H18) with a molar heat capacity of 39.36J/molK after heating in the
asked on September 15, 2018 
Physics
A plane is circling the airport. It takes 35 min to do one circle with a radius of 5.0 x 10^4 m. The plane weighs 6.05 x 10^4 kg. What the angular velocity
asked on April 16, 2018 
Math
"Two numbers have a sum of 15 and a difference of 7. What are the two numbers?" A word problem using system of equations and I'm pretty lost an help?
asked on February 25, 2018 
Pure Math
Find the complex number u=x+yi where x,y € I, such that u^2=5+12i. HELPPPPPPP!
asked on October 23, 2016 
biology
Explain the vascular system of a lilac flower Some sites would help me very much as i cant find any that explain the vascular system of the lilac flower.
asked on December 4, 2014 
algebra
a ball is thrown downward from the too of 110 ft bldg with an initial velocity of 14ft per second. the height of ball h after t seconds is given by the equation h = 16t^214t +110. how long after ball is thrown will it hit the ground
asked on December 15, 2011 
Physics :/
An object 3cm high is 20 cm from a concave mirror. The focal length of the mirror is 8 cm. a. Calculate where the image is located. b. Calculate the size of the image
asked on March 25, 2011 
Science
Sediment rocks are formed from _____ that are cemented and pressed together. I don't have a book to look in.
asked on January 13, 2011 
behavior problems (dogs)
please check my answer thanks Ariel is a sixyearold, spayed female Doberman. She has recently begun licking her left foreleg almost constantly. The licking has created a sore on her leg, but she continues the behavior. Your first recommendation to the
asked on October 6, 2008 
behavior problems(dogs)
please check my answer thanks You're contacted by the owners of Abbey, a threeyearold spayed Lab mix. Abbey has a history of biting her owners and visitors. The bites usually occur when the victim reaches for the dog. The owners believe that this problem
asked on October 6, 2008 
math
What is the measure of an angle if its two, adjacent, supplementary angles add up to 100°.
asked on October 18, 2018 
Math
Hello, can I please have help on how to find the area of a hexagon by knowing the apothem is 4 and the square root of 3? Thank you!
asked on July 15, 2016 
Financial Management
Calculate the present value of $25,000 to be received in 5 years, assuming an opportunity cost of 10%.
asked on October 26, 2014 
chemistry
2NaClO2> 2NaCl + 3O2 if 3.85 grams of NaClO3 react, how many moles of O2 are created?
asked on December 11, 2012 
Math
Match the expression: Subtract 41 from 24 raised to the 6th power; then multiply by 2.
asked on November 29, 2012 
Math
Subtract 5 from 8. Then multiply by c. Which of the. Following expressions matches the statement above? A.(85) x c B.(58) x c
asked on November 27, 2012 
math  would like to know if i did problem correct
4t^2/5=t/5+3/10 t=3/4, t=/1/2 thank you
asked on December 18, 2011 
Word Problem Question
I would like to know if I am correct, so far. The amount P of pollution varies directly with the population N of people. City A has population of 494,400 and produces 260,000 tons of pollutants. Find how many tons of pollution we should expect City B to
asked on December 16, 2011 
physics
It Takes 2 N of force to get a 15 kg object to move horizontally on a surface. What is the normal force of the surface on the object?
asked on November 8, 2011 
behavior problems(dogs)
please check my answer thanks Ideally, when working on a behavior problem, you'll show the owners ways to A. reorganize the environment so the dog has fewer chances to misbehave. B. discipline a dog correctly and not spoil him. C. teach some commands that
asked on October 6, 2008 
Physics help
Add the two component vectors from Sample Problem 1 algebraically to erify that they equal the given vector The two component vectors are: 8.6m(North) and 12m (west) The given vector is 15m(West 35 degrees North)
asked on September 30, 2014 
math
Determine whether the following argument is correct. If it's not correct, explain what is wrong with ther argument and change the minor premise to make a correct argument. If a triangle is equilateral, then it has three equal sides. Triangle ABC doesn't
asked on December 11, 2012 
math
Two lookout stations, which are 25 miles apart along the coast on a northsouth line, spot an approaching yacht. One lookout station measures the direction to the yacht at N 33degrees E, and the other station measures the direction of the yacht at S
asked on December 11, 2012 
Math
Match the expression: subtract 41 from 24 raised to the 6th power; then multiply by 2. Is it A. (24^641) x 2 Or B. 24^641 x 2 Or C. (2441)^6 x 2
asked on November 29, 2012 
Math
Add d and 7 then divide by 3
asked on November 27, 2012 
Math
Divide18 by g. Then, subtract 7. C. 18/g7 Is this right?
asked on November 27, 2012 
algebra  correction of previously submitted. Is t
4t^2/5=t/5+3/10 = t=3/4, t=1/2
asked on December 18, 2011 
Algebra
*correction of previous post* Find the LCD of the rational expressions in the list. m2/m^2+2m , 8/m^2+6m+8
asked on December 2, 2011 
Physics (Astro)
How do you express 1.65×10^4km as a multiple of 6.38x10^6 m?
asked on June 24, 2011 
mathematics
a cyclist bikes over a path at 10 miles per hour. he returns over the same path at * miles per hour. what was his average speed for the round trip.((please explain how to do this)
asked on March 22, 2011 
Physics
A closed organ pipe 0.8 m long has a diameter of 7.0 cm. The air in the church is 15oC. What is the fundamental frequency? If the heat is turned up to 20oC, what is the new fundamental frequency?  HELPHELPHELP
asked on March 1, 2011 
prealgebra
what is x? 2x+4=3x6
asked on February 10, 2011 
algebra
what is a good number sentence to show that 5 is a factor of 35?
asked on December 20, 2010 
Math
State different situations that do not involve money in which a formula like the one for compound interest is used. In each case, state a related problem and write its solution.
asked on November 13, 2010 
Math
Amy is charged 12% annual interest compounded monthly on the unpaid balance of a $2000 loan. She did not make any payments for 2 years. Her friend said the amount she owed had more than doubled, is that true? how much does she owe?
asked on November 13, 2010 
social studies
What is an another word for replanting trees?
asked on September 23, 2009 
Dog Business
Please check my answer thank you very much for your help Based on the following information below please answer the question that follow. Area A: Brooklyn Brooklyn is a very heavily populated urban area within commuting distance from Manhattan by subway,
asked on April 10, 2009 
Dog Business
Please check my answer thank you very much for your time Use the information below to answer the question that follows it Area A: Brooklyn Brooklyn is a very heavily populated urban area within commuting distance from Manhattan by subway, bus, or car.
asked on April 10, 2009 
11th grade
How did Gandhi demonstrate an appreciation for other faiths?
asked on November 11, 2008 
Religion
In the movie Gandhi, when he returned to India, what were 3 of the injustices he discovered?
asked on November 11, 2008 
behavior problems(dogs)
Please check my answer thanks The dog's desire to be in the same room with his owners is evidence of A. lack of confidence. B. pack drive. C. poor early socialization. D. separation anxiety I picked A ( wolves like to be part of a pack as well as dogs) tho
asked on October 6, 2008 
behavior problems (dogs)
Please check my answer thanks Often, when an owner disciplines his or her dog it's done A. to help the dog understand what is expected of him. B. to teach the dog a lesson. C. in anger. D. in the best interest of the dog. I picked C tho I have known people
asked on October 6, 2008 
Science
Identify the most important way heat is lost from the body during exercise? and these are the choices Evaporation Conduction Radiation Convection
asked on May 9, 2008 
Discrete Math
Could someone help me with this induction proof. I know its true. given then any integer m is greater than or equal to 2, is it possible to find a sequence of m1 consecutive positive integers none of which is prime? explain any help is greatly appreciated
asked on March 26, 2007 
discrete math
Could someone help me with this induction proof. I know its true. given then any integer m is less than or equal to 2, is it possible to find a sequence of m1 consecutive positive integers none of which is prime? explain any help is greatly appreciated
asked on March 26, 2007

math
ok
posted on March 26, 2019 
Math 11
The answer in the book says: y = 2 (x+7/2)^2 71/2
posted on March 9, 2019 
english
is it a?
posted on February 25, 2019 
Science
Well, I usually call the people here sir bc I think most of the tutors here are male.
posted on September 15, 2018 
Science
My answer is almost 800K
posted on September 15, 2018 
Language Arts ?
B B A D
posted on June 1, 2018 
social studies
god bless you Denise
posted on May 28, 2018 
~*Math Probability*~
Thanks, and, it's called "the honor code".
posted on April 25, 2018 
Education technology
Pika ah ahcooo!
posted on April 23, 2018