Wednesday
August 20, 2014

Posts by Tasneem


Total # Posts: 17

Math
A solid sphere of 1.46kg and radius 0.1m, is rolling down a rough plane that is inclined at an angle 30 degrees to the horizontal. The 3 forces acting on the sphere are its weight, friction force and the normal reaction. The sphere starts rolling down when its point of contact...
April 27, 2013

Math
A solid sphere of 1.46kg and radius 0.1m, is rolling down a rough plane that is inclined at an angle 30 degrees to the horizontal. The 3 ferces acting on the sphere are its weight, friction force and the normal reaction. The sphere starts rolling down when its point of contact...
April 27, 2013

physics/biomechanics
1. Once a person is in the air during a jump can they modify their path in the air of: a) their head b) Their whole body centre of gravity c) their hip joint (yes or no) 2. To achieve peak horizontal distance on flat ground, what should the angle of take off be?
February 7, 2013

physics/biomechanics
1. Once a person is in the air during a jump can they modify their path in the air of: a) their head b) Their whole body centre of gravity c) their hip joint (yes or no) 2. To achieve peak horizontal distance on flat ground, what should the angle of take off be?
February 7, 2013

Organic chem
i have no idea how to do this! please help me :) 1a. When sodium benzyloxide is reacted with excess acetic anhydride it produces benzyl acetate and byproducts. What are those byproducts? If extracting with dichloromethane, what could be added to the aqueous layer to sequester ...
August 7, 2012

Organic Chemistry
1a. When sodium benzyloxide is reacted with excess acetic anhydride it produces benzyl acetate and byproducts. What are those byproducts? If extracting with dichloromethane, what could be added to the aqueous layer to sequester the byproducts? Which layer would be on top, the ...
August 6, 2012

Life Orientation
in 10-15 lines critically discuss 5 ways in which the human or environmental problem impacts on the community. provide relevant sources to support your claims
May 20, 2012

5th grade math
i don't understand the question
April 19, 2012

Chemistry- Acids and Buffers
Cyanic Acid is a weak acid HOCN + H2O <--> H3O+ +OCN- ka= 3.5*10^-4 a) if 2.5ml of 0.01 M cyanic acid solution is added to 25.0 ml of a formis acid buffer with ph = 3.70, what is the ratio of [OCN-]/[HOCN] in the resulting solution? b) determine the pH of a 0.500 M ...
April 9, 2012

Chemistry- Kinetics
Worked! Thank you! - Why is it ln(No/N) = kt though? The formula I have in my notes for first order reactions is ln(N1/No) = -kt
April 7, 2012

Chemistry- Kinetics
2. At 600 K the decomposition of gas ohase nitroethane (CH3CH2NO2) is first order with a rate constant of 1.9*10^-4 s^-1. CH3CH2NO2 --> C2H4 + HNO2 a) Write out the differential and integrated rate laws for this reaction. b) If a 10.0g sample of nitroethane is heated to ...
April 7, 2012

Chemistry
calculate the ph of a solution that results from titrating 0.0500 moles of cyanic acid to the equivalence point with an equal number of moles of OH-, if the final volume of the solution is 150 ml ka= 3.50 * 10^-4
April 6, 2012

English
Are you on skype plz reply back now
October 9, 2011

physics
a body of mass 20 kg suspended from a rigid support is rotated on a cylinder of d=20cm calculate moment of force above the axis of cylinder
November 9, 2010

naturaral sciences
How do we design and experiment that proves that the water forming on the outside of a can comes from air?
October 16, 2010

College Chemistry
So i been trying to solve this question like for ever! so i hope you guys can help me , here is the question : the volume of a seawater on earth is about 330,000,000 mi3. if seawater is 3.5% sodium chloride by mass and has a density of 1.03g/mL, what is the approximate mass of...
January 19, 2010

science
using bacterias or generally just living organisms in manufactured things such as drugs, recycling etc.
January 19, 2010

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