Monday
October 20, 2014

Posts by Bam


Total # Posts: 15

Maths
A rectangular photo measures 18cm by 7cm. The lengths are enlarged in the ratio 2:3. What is the ratio of the original photo to the area of the enlarged photo?
October 9, 2014

math
this 7-digit number is 8,920,000 when rounded to the nearest ten thousand. the digits to the tens and hundreds places are the least and same value. the value of the thousands digit is double that of the ten thousands digit. the sum of all its digits is 24.
September 2, 2014

Math
Twenty two exceeds twice of a number by14. What is the number?
January 27, 2014

physics
In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler, running at a velocity of +4.4 m/s, grabs him. The tackler holds onto the receiver, and the two move off together with a velocity of +2.9 m/s. The mass of the tackler is ...
November 6, 2013

physics
A water skier, moving at a speed of 6.42 m/s, is being pulled by a tow rope that makes an angle of 39.7 ° with respect to the velocity of the boat (see the drawing). The tow rope is parallel to the water. The skier is moving in the same direction as the boat. If the ...
February 1, 2011

Chemistry - Blue Printing Experiment
Which one is the oxidizing agent and the reduction agent? Can the second reaction occur in the absence of light? Thank you!
January 29, 2011

Chemistry - Blue Printing Experiment
Which of the two reactions in Blue Printing is an oxidation-reduction reaction? What is the oxidizing agent and the reducing agent? Fe^3+ + C204^-2 (oxalate) -> Fe^2+ + CO3 Fe^2+ + Fe (CN)6^-2 -> Fe3[Fe(CN)6]2 Can the second reaction occur in the absence of light? ...
January 29, 2011

Chemistry - Blue Printing Experiment
What will happen to the blueprint if it was not thoroughly washed?
January 29, 2011

Chemistry-pH
If you are given a colored substance as a sample, how would you measure the pH of a sample?
January 25, 2011

chemistry
How does Carbon hybridize it's S and P orbitals and what effect does this have on the 3D structure and chemical behavior? Your answer must include 1) diagrams of SP, SP2, and SP3 bonds as well as any left over Py or Pz orbitals; 2) a discussion with diagrams of how the ...
January 23, 2011

Chemistry
How does the 3D structure of SP3 bonds of Carbon, Oxygen and Nitrogen cause them to form polar molecules? How does the three dimensional structure of SP3 bonds of Carbon, Oxygen and Nitrogen cause them to form polar or non-polar molecules? The answer must include a 3d diagram ...
January 23, 2011

English - Thiong'o Decolonising the mind
What is the main idea of Thiong'o's essay, Decolonising The Mind?
January 9, 2011

chemistry
Determine whether Cd2+ can be separated from Zn2+ by bubbling H2S through a 0.3 M HCl solution that contains 0.005 M Cd2+ and 0.005 M Zn2+. Ksp for CdS is 8x10^-7 and Ksp for ZnS is 3x10^-2.
October 27, 2010

chemistry
Determin whether Cd2+ can be separated from Zn2+ by bubbling H2S through a 0.3 M HCl solution that contains 0.005 M Cd2+ and 0.005 M Zn2+. Ksp for CdS is 8x10^-7 and Ksp for ZnS is 3x10^-2.
October 27, 2010

Chemistry
In an excess of NH3(aq), Cu2+ ion forms a deep blue complex ion, Cu(NH3)4^2+ (Kf=5.6x10^11). Calculate the concentration of Cu2+ in a solution adding 5.0x10^-3 mol of CuSO4 to .5 L of .4 M NH3
October 24, 2010

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