A car of mass 1410 kg traveling at 26 m/s is at the foot of a hill that rises 115 m in 4 km. At the top of the hill, the speed of the car is 14 m/s. Find the average power delivered by the car's engine, neglecting any frictional losses.
October 4, 2012
A golf ball is hit with an initial velocity of 50 m/s at an angle of 39 degrees above the horizontal. How far does it travel?(horizontal distance)(g = 9.8 m/s2). I made a right triangle. Found that Vi(x)=38.857, Vi(y)=312.466, both Vf's were 0, although Vf(y) is taking ...
September 18, 2012
A job in an insurance office involves telephone conversations with policyholders. The office manager estimates that about half of the employees time is spent on the telephone. How many observations are needed in a work sampling study to estimate that time percentage to ...
September 29, 2011
Given these chemical reactions: Ca^(2+)(aq) + 2IO3^(-)(aq) → Ca(IO3)2(s) Ca(NO3)2·4H2O(s) → Ca^(2+)(aq) + 2NO3^(-)(aq) + 4H2O(l) KIO3(s) → K^(+)(aq) + IO3(-)(aq) Calculate the masses of Ca(NO3)2·4H2O(s) and KIO3(s) required to make 10 g of Ca(...
January 23, 2010
A trait whose expression is affected by the presence of sex hormones is said to be a. sex-influenced b. sex-linked c. X-linked d. Y-linked I read the section multiple tmes, and the book doesn't really specify. Thanks in advance if you could answer it!
March 20, 2008
(Preferably answered by tomorrow night - that's plenty of time.) Ray OB is the bisector of angle AOC and ray OC is the bisector of angle BOD. m of angle AOC = 60. Find m of angle COD. *m means "measure" Write a proof in two-column form. Given: ray DC is ...
October 1, 2007