Thursday
May 5, 2016

# Posts by han

Total # Posts: 119

Math
thank you
December 23, 2015

Math
What is the equation x = y + z solved for z?
December 23, 2015

chem
At 668K 1 mol each of CO and Cl2 are introduced into an evacuated 1.75 L flask. At equilibrium, the total pressure of the gaseous mixture is 32.4 atm. Calculate Kp. How to solve this ? Co+Cl2<>CoCl2
September 19, 2015

chemistry
Bromine gas is allowed to reach equilibrium according to the equation. Br2=2Br Kc=0.0011 at 1280°C Initial concentration of br2 is 0.063M and Br is 0.012M. How to calculate the concentration of these species at equilibrium. Please help me .
September 19, 2015

Social Studies
Science Nerd-In- Training is correct!
September 15, 2015

physics
A baseball has a mass of about 0.15 kg, and it is pitched towards home plate at a speed of about 60 m/s. If the bat exerts an average force of 8600 N for 2.4 ms, what is the final speed of the ball in m/s?
January 7, 2015

Math
Solve algebraically, 1/x=(x-34)/(2x^2).
October 27, 2014

Physics
because when I do that I get a different answer than there is
October 25, 2014

Physics
So you want me to split the two forces into North and East then add it
October 25, 2014

Physics
I don't completely understand
October 25, 2014

Physics
In a football game, a quarterback (G), hit simultaneously by two linebackers, experiences horizontal forces of 412 N [27.0° W of N] and 478 N [36.0° N of E]. Determine the net force of the quarterback.
October 25, 2014

Math
The answer says the ROC is -2737.8
October 13, 2014

Math
Determine the intensity of radiation andits rate of change on Earth, which is 1 AUfrom the Sun.
October 13, 2014

Math
Radiation from the Sunkeeps us all alive, but with the thinning of the ozone layer, it is important to limitexposure. The intensity of radiation is inverselyproportional to the square of the distance thatthe Sun’s rays travel.The formula I=k/d^2 models the ...
October 13, 2014

Math
without solving, describe two ways to show that 2, -1, 3, and -2 are the roots of the polynomial equation x^2-2x^3-7x^2+8x+12=0.
October 6, 2014

Math
ok thanks for your help:D
October 6, 2014

Math
I tried it didn't work
October 6, 2014

Math
Solve by factoring x^3-4x^2-3x+18=0
October 6, 2014

Math
ok thanks :D
October 6, 2014

Math
ok thanks but how do you know if the roots are imaginary or not?
October 6, 2014

Math
Determine the real roots of the polynomial equation: (x^2+1)(x-4)=0
October 6, 2014

Physics
During baseball practice, you go up into the bleachers to retrieve a ball. You throw the ball back into the playing field at an angle of 42° above the horizontal, giving it an initial velocity of 15 m/s. If the ball is 5.3 m above the level of the playing field when you ...
October 5, 2014

Physics
An airplane dropping supplies to northern villages that are isolated by severe blizzards and cannot be reached by land vehicles. The airplane is flying at an altitude of 785m and at a constant horizontal velocity of 53.5 m/s. At what horizontal distance before the drop point ...
October 4, 2014

Physics
A city bus leaves the terminal and travels, with a few stops, along a straight route that takes it 12 km [E] ofits starting position in 24 min. In another 24 min, the bus turns around and retraces its path to the terminal. What is the average speed of the bus for the entire ...
October 2, 2014

Physics
route that takes it 12 km [E] of its starting position in 24 min. In another 24 min, the bus turns around and retraces its path to the terminal.
October 2, 2014

Chemical
Ok thanks a lot for your help I understand it now :D
September 14, 2014

Chemical
The molar enthalpy of solution for ammonium chloride is 14.8kJ/mol. What is the final temperature observed when 20.0g of ammonium chloride is added to 125mL water at 20.0'C?
September 14, 2014

Chemistry
ok thanks
September 13, 2014

Chemistry
For the following equation, write a thermochemical equation that includes an energy term within the equation: The formation of 1 mol of copper(II)chloride from its elements releases 220.1kJ of energy.
September 13, 2014

Chemistry
Ok thanks again for all your help :D
September 13, 2014

Chemistry
ok thanks a lot for your help but why did you put a question mark after the > in the equation you gave?
September 13, 2014

Chemistry
What do you mean?
September 13, 2014

Chemistry
Rewrite the following using a thermochemical equation with a deltaH value: a) The standard molar enthalpy of combustion for propane is -2220kJ/ mol.
September 13, 2014

Physics
Assuming the best high jump record from a standingposition in a school was 1.52 m, what initial velocity was needed for this jump? Neglect any sideways motion.
June 15, 2014

Physics
wait nvm
June 14, 2014

Physics
If I send you a link could you take a look at it?
June 14, 2014

Physics
A 45-t electric train accelerates uniformly from a station with the train’s motion depicted in the graph in Figure 2.(Recall that 1 t = 1.0 × 103 kg.)Determine the net force acting on the train during the uniform acceleration portion of the motion.
June 14, 2014

Physics
Alright thanks a lot mate :D
June 14, 2014

Physics
The Yukon Quest, an annual dog-sled race between Whitehorse in the Yukon and Fairbanks in Alaska, covers a gruelling distance of 1.61 × 103 km. Assuming that the average speed of the dog team that set a course record is 6.28 km/h, determine the best time for this race. ...
June 14, 2014

Math
I know
June 11, 2014

Math
Use partial factoring to determine the vertex of y=3x^2+5x-1.
June 11, 2014

Math
oh ok thanks a lot for your help :D
June 11, 2014

Math
angle theta is in the standard position and 0'=<theta=<180'. If cos theta = -2/3, find the exact value of sin theta* tan theta.
June 11, 2014

Math
thanks for you help :D
June 10, 2014

Math
The doubling period of a bacteria culture is 35 minutes and it starts with 1400 bacteria. How many bacteria will there be after 3 hours? Round your answer to the nearest tenth.
June 10, 2014

Maths
ok thanks a lot for your help :D
June 10, 2014

Maths
The average depth of the water in a port on a tidal river is 4 m. At low tide, the depth of the water is 2 m. One cycle is completed approx every 12 h. a) find an equation of the depth d(t) metres, with respect to the average depth, as a function of the time, t hours, after ...
June 10, 2014

Math
sorry it should be corrected to t
June 10, 2014

Math
Determine the number of triangles that could be drawn with the given measure. Then, find the measures of the other angles and the other side in each possible triangle. Round side lengths to the nearest tenth of a unit and angle measure to the nearest tenth of a degree, where ...
June 10, 2014

Math
Ok thanks a lot for your help steve :D
June 10, 2014

Math
How do you know what the period of this function is: y=2cos3(x+45')? Explain.
June 10, 2014

Math
ok thanks a lot for your help :D
June 9, 2014

Math
Determine the number of triangles that could be drawn with the given measure. Then, find the measures of the other angles and the other side in each possible triangle. Round side lengths to the nearest tenth of a unit and angle measure to the nearest tenth of a degree, where ...
June 9, 2014

Maths
but that wasn't the correct answer
June 9, 2014

Maths
Find the maximum or minimum value of function and the value of x when it occurs: -2x^2+5x+5.
June 9, 2014

Math
wait nvm thanks for your help :D
June 9, 2014

Math
so can you show me the correct way to do it?
June 9, 2014

Math
but the answer says that it's a max of 65/8 at x=5/4
June 9, 2014

Math
Find the maximum or minimum value of function and the value of x when it occurs: -2x^2+5x+5.
June 9, 2014

Chemistry
ok thanks :D
May 30, 2014

Chemistry
A sample of hydrogen gas is collected by water displacement at 20.0'C when the atmospheric pressure is 99.8kPa. What is the pressure of the dry hydrogen, if the partial pressure of water vapour is 2.33kPa at that temperature?
May 30, 2014

Chemistry
I figured it out thanks for your help :D
May 30, 2014

Chemistry
I got 1.7*10^4L but not sure if I was correct or not
May 30, 2014

Chemistry
A tank of chlorine gas contains 25.00 kg of pressurized liquid chlorine. If all the chlorine is released in its gaseous for at 17'C and 0.98atm, what volume does it occupy?
May 30, 2014

Math
If 5+x, 8, and 1+2x are consecutive terms in an arithmetic sequence, find x.
May 29, 2014

Math
A doctor prescribes 200 mg of medication on the first day of treatment. The dosages is halved on each successive day for one week. To the nearest milligram, what is the total amount of medication administered?
May 29, 2014

Math
Find the sum of the arithmetic series -12-9-6-...39.
May 28, 2014

Math
How do you get the values?
May 28, 2014

Math
A tractor-trailer worth \$84 000 depreciates 20% the first year and 10% each year thereafter. How much is it worth after 5 years?
May 28, 2014

Math
wait I understand thanks for your help :D
May 28, 2014

Math
why didn't you use this equation: 765=3(2)^n-1
May 28, 2014

Math
How many terms of the series 3+6+12+24+...add to 765?
May 28, 2014

Maths
like sorry for the sequence 1, 4, 16 how did you get 1?
May 24, 2014

Maths
I have one last question. How did you know a=1?
May 24, 2014

Maths
alright thanks :D
May 24, 2014

Maths
by the way did you multiply the equation by 10 to get rid of the decimal to get a whole number?
May 24, 2014

Maths
Thanks for your help :D
May 24, 2014

Maths
A geometric series has three terms. The sum of the three terms is 42. The third term is 3.2 times the sum of the other two. What are the terms?
May 24, 2014

Math
ok thanks
May 24, 2014

Math
A ball is thrown 16 m into the air. The ball falls, rebounds to half its previous height, and falls again. If the ball continues to rebound and fall in this manner, find the total distance the ball travels until it hits the ground for the sixth time.
May 24, 2014

Chemistry
ok thanks a lot for your help :D
May 17, 2014

Chemistry
so then would the answer be 2.07?
May 17, 2014

Chemistry
The temperature of a 2.25L sample of gas decreases from 45.0'C to 20.0'C. What is the new volume?
May 17, 2014

Math
thanks a lot for your help!
May 11, 2014

Math
Canada ranks fifth in the world in the production of gold. By the end of one year, one of Canada's mines had produced about 198 t of gold since it opened. if the annual production averaged 4.5 t, predict the total production by the end of next year and the year after that
May 11, 2014

Math
A Canadian zoo started with 16 whooping cranes and planned to hatch 20 chicks a year. A few birds were kept for breeding and the rest released into the wild. At the end of last year, a total of 136 cranes had spent some time in the zoo. If the pattern continues, how many ...
May 11, 2014

Physics
Hey thanks a lot but how did you know to put 8/(24)?
May 1, 2014

Physics
Find the equivalent resistance in 16 ohm and 8.0 ohm connected in parallel.
May 1, 2014

Physics
Find the equivalent resistance in 16 ohms and 8.0 ohms connected in parallel.
April 30, 2014

Math
Alright thanks a lot :D
April 26, 2014

Math
An exponential function with a base of 3 has been vertically stretched by a factor of 1.5 and reflected in the y-axis. Its asymptote is the line y=2. Its y-intercept is (0,3.5). Write an equation of the function and state its domain and range.
April 26, 2014

chemistry
Thanks :D
April 20, 2014

chemistry
can you please show me the proper way to do it?
April 20, 2014

chemistry
Yes but the answer was incorrect
April 20, 2014

chemistry
HCL acid is available as a stock solution with a concentration of 10 mol/L. If you need (9.0*10^-1) L of (2.50*10^0) mol/L hydrochloric acid, approximately how much distilled water will you need to make the dilution?
April 20, 2014

chemistry
Thank you for all your help it was much appreciated :D
April 20, 2014

chemistry
When I did the equation you gave me I got 483mL but that wasn't the answer.
April 20, 2014

chemistry
but doesn't the litres in the mol/L have to be converted to mL?
April 20, 2014

chemistry
HCL acid is available as a stock solution with a concentration of 10 mol/L. If you need (2.100*10^0) L of (2.3*10^0) mol/L hydrochloric acid, approximately how much distilled water will you need to make the dilution?
April 20, 2014

Math
Type Amount Recycled (%) Amount Recycled (in millions of tons) Paper and Paperboard 52.8 45.9 Yard Trimmings 22.2 19.3 Metals 8.6 7.5 Glass 3.7 3.2 Plastics 3.1 2.7 Wood 2.7 2.3 Food waste 1.6 1.4 Other 5.3 4.6 Date US Population Jul 1, 2012 313.85 million Jul 1, 2011 311.59 ...
March 20, 2014

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