March 23, 2017

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Posts by alaa

Total # Posts: 15

Outlines an investigation into a chemical and/or physical change. 1. State the aim of the investigation. 2. Predict the results of the investigation (hypothesis). Can you please help me with those
September 13, 2016

A 3.6 -kg mass attached to the end of a string swings in a vertical circle (radius = 17.9 m). When the string is horizontal, the speed of the mass is 3.8 m/s. What is the magnitude of the force of the string on the mass at this position?
April 17, 2015

A 1.7 -kg object attached to the end of a string swings in a vertical circle (radius = 80 cm). At the top of the circle the speed of the object is 26.0 m/s. What is the magnitude of the tension in the string at this position?
April 17, 2015

A hawk flies in a horizontal arc of radius 12.0 m at a constant speed of 7.1 m/s. It continues to fly along the same horizontal arc but increases its speed at the rate of 7.9 m/s2. Find the acceleration magnitude under these conditions.
April 17, 2015

A dilute solution of sulfiric acid is added to 15g of copper and iron mixture. a) the volume of h2 envolved at standard conditions is 4.48L what is the mass of each of the metals constituting the mixture ? Vm=24l.mol.
October 18, 2014

Juan says, "When you put together unequal groups, you can only add." Is she correct? Explain.
October 30, 2013

college physics
One athlete in a race runnng on a long, straight track with a constanct speed v1 is a distance d behind a second athlete running with a constant speed v2. (a) Under what circumstances is the first athlete able to overtake the second athlete? (Use v_1 for v1, v_2 for v2, and d ...
October 21, 2013

18 r4
September 27, 2012

September 18, 2012

Huhuhuhuhu me too
August 11, 2012

A 5.30 kg package slides 1.57 m down a long ramp that is inclined at 11.8^\circ below the horizontal. The coefficient of kinetic friction between the package and the ramp is mu_k = 0.320 Calculate the work done on the package by the normal force. If the package has a speed of ...
November 27, 2011

general chemistry
naturally occuring chlorine is composed of 35CL with atomic mass of 34.969 37CL with atomic mass of 36.966 the average atomic mass id 35.453 what are the percantages of each isotope in naturally occuring chlorine ?
March 25, 2011

melting point of mno4
November 1, 2010

Drwls is incorrect as 425/10 is 42.5 NOT 4.25! Also the measure for wave speed MUST be in m/s. Other than that it is correct.
January 25, 2010

french exam tomorrow, WHAT DO I DO?!
i want french exam for grade 6
May 7, 2009

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