Friday
November 28, 2014

Posts by kj


Total # Posts: 60

Chemistry
What is the pH of a solution prepared by mixing 25.00 mL of 0.10 M CH3CO2H with 25.00 mL of 0.010 M CH3CO2Na? Assume the volumes of the solution are additive and that Ka = 1.8 x 10-5 for CH3CO2H. 4. How is this solved?
November 4, 2014

math
12+13 which equals...25!!
September 2, 2014

Math
Ok
September 1, 2014

Math
What is... 4,078 rounded to the nearest thousand? 2,093 rounded to the nearest thousand?
September 1, 2014

Math
What is 5,210 rounded to the nearest hundred? 90 rounded to the nearest hundred?
September 1, 2014

ethics
Proportionality
September 1, 2014

physics
A senior citizen walks 275 m in 25 min going around a shopping mall. If she wants to increase her average speed by 25 % in walking a second lap, what would her travel time in minutes have to be?
June 1, 2014

physics
A brass ball weighs 270gram in air and when it was immersed in water,it displaced 30 ml of water .how much will the ball weigh in water?
March 13, 2014

GEOMETRY MIDPOINT FORMULA steve how did this hapn
What formula did you use?
January 31, 2014

adanced algebra
how long will it take to make $9944. dollars at 1.25 interest when i already have $7500. I have to make line graph of each year.
August 17, 2013

chemistry
How many liters of 0.50M NaOH must be added to 125 mL of 0.75M HCL to neutralize it
May 19, 2013

CHEMISTRy
predict the product of the following: a.) Ca + H + OH => b.) Pb(NO3)2 + Cu =>
March 29, 2013

college physics
24.633m/s
March 29, 2013

math
(w+9)^3+56=0 write were w i a real number write answer in simplified radical form write b^2/3 as a radical expression
March 13, 2013

Chemistry
Calculate the final temperature of 244 of water initially at 35 upon absorption of 20 of heat
February 5, 2013

Economics
Suppose you earned $50,000 last year, and inflation is at 5%. You receive a salary increase of $2,000. Explain your increase salary in nominal and real terms. Did you receive an increase?
November 26, 2012

HISTORY
yes
September 3, 2012

health
b is wrong
August 14, 2012

math
Thank you it was right on the money... so to speak.
July 2, 2012

math
dee went shopping she had 75 dollars to spend. At one store, she bought a dress and a tube of lipstick. The lipstick was half the price of the dress. she then spent half of what she had left on a pair of shoes. This left her with 13 dollars. How much was the dress and the ...
July 2, 2012

math 3
Peter is playing a game where a ten-sided die is rolled. Four sides of the die have the number 10, three sides of the die have the number 5, two sides of the die have the number 25, and one side of the die has the number 27. What is the expected value of a roll?
June 11, 2012

math 3
Peter is playing a game where a ten-sided die is rolled. Four sides of the die have the number 10, three sides of the die have the number 5, two sides of the die have the number 25, and one side of the die has the number 27. What is the expected value of a roll?
June 11, 2012

Chemistry
"I am working on a problem like this one. I dont understand how you got to 51.4 from 30500 + (-20,907) = 51.4 kJ. Can you explain?" The 30500 should be negative: -30500+(-20907) This gives you -51407 J/mol. Convert to kJ: -51.407 kJ/mol or -51.4 kJ/mol.
March 14, 2012

Spanish 1
_______esta la silla? whic word best fits? hay,Que,Donde, or Como?
December 14, 2011

University Chemistry (first year)
jkk
October 17, 2011

science
Most proteins (do or don't) pass through the plasma membrane? Explain? Substances that dissolve in (lipids or water) can more readily pass across the plasma membrane. Explain Ions can cross the plasma membrane more easily if they have the (same or opposite) charge as the ...
September 18, 2011

Physics
A speedboat starts from rest and accelerates at +2.01 m/s2 for 7.05 s. At the end of this time, the boat continues for an additional 6.15 s with an acceleration of +0.518 m/s2. Following this, the boat accelerates at -1.49 m/s2 for 8.50 s. (a) What is the velocity of the boat ...
September 7, 2011

Physics
What is the magnitude of the average acceleration of a skier who, starting from rest, reaches a speed of 5.8 m/s when going down a slope for 2.8 s? How far does the skier travel in this time?
September 7, 2011

physics
One afternoon, a couple walks five-eighths of the way around a circular lake, the radius of which is 1.45 km. They start at the west side of the lake and head due south to begin with. (a) What is the distance they travel?
September 7, 2011

physics
a) d=m/v d= (1.13*10^-3)/1 d= 1.13e-3 g/cm^3
April 15, 2011

german
I have to write a slogan in german that is a command using the four different types of command forms (du, ihr, wir, Sie), and I need help figuring out how to write them. The slogan I am using is "Get your own box." from cheez-its. How would I write them in German?
January 21, 2011

Pre-Algebra
Can anyone show me step by step how to solve this problem? 26cm/s = m/min convert this problem using dimensional analysis.What is the answer and how did you get it?Thanks,kj
January 1, 2011

Pre-Algebra
Can someone show me how to solve this problem step by step?Here is the problem, 26cm/s= m/min,how to solve it by convert rate suing dimensional analysis.
January 1, 2011

Pre-Algebra
Can anyone show me step by step how to solve this problem? 26cm/s = m/min convert this problem using dimensional analysis.kj
January 1, 2011

Pre-Algebra
Victoria you helped me with the last problem can you help me again with this one please? 26cm/s=m/min. Convert this using the dimensional analysis.Thank-you.kj
January 1, 2011

Pre-Algebra
can someone show me how step by step to convert this problem 45 mi/h=ft/s using dimensional analysis?Thanks.kj
January 1, 2011

psychology
unconditioned stimuli is men attracted to women
October 13, 2010

Chemistry
when a platinum wire dipped into an unknown solution was held over a Bunsen burner flame, an intense purple colour resulted. when 6 drops of 1M AgNO3(aq) in 6MHNO3(aq) was added to this solution, a white-coloured precipitate formed. What is the chemical formula of this unknown?
September 29, 2010

physics
Two crates are connected by a massless rope that passes over a pulley as shown in the figure below. If the crates have mass 32 kg and 80 kg, find their acceleration. If the system begins at rest, with the more massive crate a distance 11 m above the floor, how long does it ...
February 21, 2009

physics
A flag of mass 2.2 kg is supported by a single rope as shown in the figure below. A strong horizontal wind exerts a force of 10 N on the flag. Find the tension in the rope and the angle θ the rope makes with the horizontal. Tension = N θ = °
February 21, 2009

physics
The three forces shown in the figure below act on a particle (with F1 = 48.0 N, F2 = 58.0 N, θ1 = 63.0°, and θ2 = 27.0°). If the particle is in translational equilibrium, find F3, the magnitude of force 3 and the angle θ3. F3 = 1 N θ3 = 2° (...
February 21, 2009

physics
Two ropes are attached to a skater as sketched in the figure below and exert forces on her as shown. Find the magnitude and direction of the total force exerted by the ropes on the skater if θ1 = 32.0° and θ2 = 53.0°. what is the magnitude and direction (...
February 21, 2009

physicss please help
Calculate the terminal velocity for a baseball. A baseball's diameter is approximately d = 0.073 m, and its mass is m = 0.146 kg. Express your answer in meters per second and miles per hour. (Assume a drag coefficient of 1 and air density of 1.3 kg/m3.) __ m/s __ mph
February 14, 2009

physicsss
A cable attached to a block of mass 11 kg pulls the block along a horizontal floor at a constant velocity. If the tension in the cable is 5.3 N, what is the coefficient of kinetic friction between the block and the floor?
February 14, 2009

physics!!
You are a secret agent and find that you have been pushed out of an airplane without a parachute. Fortunately, you are wearing a large overcoat (as secret agents often do). Thinking quickly, you are able to spread out and hold the overcoat so that you increase your overall ...
February 14, 2009

physics
A rock is dropped from a very tall tower. If it takes 4.1 s for the rock to reach the ground, what is the height of the tower?
February 13, 2009

physics
In SI units, force is measured in newtons, with 1 N = 1 kg · m/s2. Which of the following combinations of units can also be used to measure force? 1 kg · m4/(s2 · cm3) g · cm2/s kg · miles/(minutes)2 g · cm/s2 g · m/s
February 7, 2009

science
A volcano
February 4, 2009

physics!!
The figure below shows the acceleration as a function of time for an object. (a) If the object starts from rest at t = 0, what is the velocity of the object as a function of time? for 0s < t < 10s v(t) = m/s for 10s < t < 26s v(t) = m/s (b) If the object instead ...
February 3, 2009

physics!!
The figure below shows the acceleration as a function of time for an object. (a) If the object starts from rest at t = 0, what is the velocity of the object as a function of time? for 0s < t < 10s v(t) = m/s for 10s < t < 26s v(t) = m/s (b) If the object instead ...
February 3, 2009

physics
A jogger maintains a speed of 2.5 m/s for 188 m until he encounters a stoplight, and he abruptly stops and waits 27 s for the light to change. He then resumes his exercise and maintains a speed of 3.6 m/s for the remaining 51 m to his home. (a) What was his average velocity ...
February 2, 2009

physics (plz help)
In SI units, acceleration is measured in units of meters per second squared (m/s2). Which of the following combinations of units can also be used to measure acceleration? km/s2 cm/s miles per hour m3/(mm2 · s2) cm/s2 miles/(minutes)2
February 2, 2009

physics
A vector has components Ax = 44 m and Ay = 30 m. Find the length of the vector vector A and the angle it makes with the x axis. in meters and in degrees
January 28, 2009

physics
The diameters of Earth and the Sun are approximately 1.3 107 m and 1.4 109 m respectively, and the average Sun-Earth distance is 1.5 1011 m. Consider a scale model of the solar system, where Earth is represented by a peppercorn 2.3 mm in diameter. Calculate the diameter of ...
January 28, 2009

7th grade science
I have to write a kids book showing the process of photosynthesis,including chloroplast,carbon dioxide, oxygen,sugar starch suns energy water reactanats & products. Can you help!
November 10, 2008

Spelling
Just keep trying you'll get I promise (keep ur head up)
January 9, 2008

social studies
What does it mean when they ask my identity? Do I include sports future, likes and dislikes, education,etc.
September 30, 2007

Science
How many Blades of grass would be eaten by a rabbit one fox? How long is the grass? What time period?
May 22, 2007

Algebra
What is the sum of 38 and twice a number is 124. Find the number 43 The sum of 38 and twice a number is 124. Find the number.
December 9, 2006

science
Hello i dont know i was trying to look for that to
November 28, 2006

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