Tuesday
October 21, 2014

Posts by Aditya


Total # Posts: 37

physics
A ball is thrown horizontally from a building of height 80m. the kine joining the top of the building to the point where it hits the ground makes an angle of 45 degrees with the ground. what is the initial velocity of the ball?
September 19, 2014

Pre-Cal
There exist two complex numbers c, say c1 and c2, so that 2 + 2i, 5 + i, and c form the vertices of an equilateral triangle. Find the product c1 c2. I need help
September 6, 2014

Precalculus
Let z and w be complex numbers such that |2z - w| = 25, |z + 2w| = 5, and |z + w| = 2. Find |z|. I need a little help with absolute values on complex numbers.
August 16, 2014

Complex Numbers
The system of equations |z - 2 - 2i| = \sqrt{23}, |z - 8 - 5i| = \sqrt{38} has two solutions z1 and z2 in complex numbers. Find (z1 + z2)/2. Im really just plain old confused. Could anyone help me out?
August 13, 2014

Precalculus
Find the complex number z that satisfies (1 + i)z - 2 overline{z} = -11 + 25i. Im not sure how to solve this. I tried distributing the z out first but im still confused on this problem.
August 13, 2014

Precalculus
Let a and b be real numbers. The complex number 4 - 5i is a root of the quadratic z^2 + (a + 8i) z + (-39 + bi) = 0. What is the other root? I tried working this problem and so far I got that (a+8i) - (4-5i)= (-39-bi)/(4-5i). Im not sure how to solve this problem.
August 13, 2014

Algebra
What do the two terms have in common? Absolutely nothing except for 1. Therefore your answer should be 1.
August 9, 2014

Precalculus
Let S be the set of points {(r, theta): 2<=r<=6, pi/3 <= theta<= 5pi/6} Find the area of S. Im having trouble with this problem and have been stuck on it for a while. Any help?
August 9, 2014

Precalculus
For both theta = pi/2 and 3pi/2, r = 2. Does this mean that its only half an ellipse?
August 9, 2014

Precalculus
The graph of 4/(2-cos(theta)) forms a closed curve. The area of the region inside the curve can be expressed in the form k \pi. What is k^2? So I tried this problem and I got it to be an ellipse 1 = (((x + 8/6)^2)/((16/3)^2)) + ((y^2)/4)) Is this correct?
August 9, 2014

Precalculus
Suppose that the point (rho, theta, phi)= (12, 2pi/3, 5pi/4) in spherical coordinates can be expressed as (x, y, z) in rectangular coordinates. Find x+z. I first found x by using the conversion method (r*sin(theta)cos(phi)= x ) I got -3(sqrt(6)). Then I found z using (z= r*cos...
August 8, 2014

geometry
RECTANGULAR ARRANGEMENTS OF NO 12 AND18
June 28, 2014

maths
(√7+√5)(√7-√5)
May 26, 2014

Radioactivity
A bone fragment has lost 75% of its original carbon-14. What is the age of the bone fragment? My answer is about 11 000 years but I don't know if its right
April 21, 2014

math
In English Class, after studying a book called \The Lord of the Flies" by William Golding, students are split into 6 groups and each group is required to make a fi lm based on one of the 8 important scenes in the novel. Each group can choose which scene they are creating ...
April 2, 2014

Chemistry
Br2(l)+Cl2(g) (double arrow) 2BrCl(g) dH=+29.4 kJ/mol I am having trouble understanding this. Will the system shift left, right, or unchanged and why? a.Increasing Temp. b. Increasing pressure in flask by adding Ar. c. Increasing volume of flask d. Adding Br2(l)...is answer ...
February 12, 2014

english
Many schools experience disruptive and anti-social behaviour, sometimes on a daily basis. Imagine that you attend the school at which Mrs Rodriguez is the Headteacher. Mrs Rodriguez has decided to tackle bad behaviour at your school. Recently there have been some very serious ...
November 7, 2013

math
TODAY
May 29, 2013

science
How is molecular formula and emperial formula related
May 21, 2013

Geometry
520
May 15, 2013

Biology
it is very easy
April 29, 2013

Physics
A man cycles up a hill whose slope is 1in20. If themass of the man and the cycle is 150kg and the man covers a distance of 100m along the incline, calculate the work done by theman.
November 27, 2012

elocution
i want essay for college perpose
November 27, 2012

Physics
A stream of water flowing horizontally with the speed of 15m/s gushes out of a tube of cross-sectional area 10-2m2 and hits a vertical wall nerby. What is the force exerted on the wall by the impact of water assuming it does not rebound?
August 20, 2012

Physics
A ball of mass 200g strikes a rigid wall normally at the speed of 25m/s and bounces with the same speed. Time of contact of the ball with the wall is 1s. calculate the change in momentum and the force exerted by the ball on the wall?
August 20, 2012

physics
a particle is dropped under gravity from rest from a height and it travels a distane of 9h/25 in the last second. Calculate the height h?
August 20, 2012

Physics
A car moves along a circular track at 60 kmph. If the radius of the track is 300 m, calculate the acceleration towards the centre
August 11, 2011

Geometry
(C)is the right answer that two perpendicular makes four ninety degree angles
August 5, 2011

Physics
How much work is done to move a 1400 kg car from rest to 25 m/s.If this takes place over a distance of 130 m, what is the average net force?
July 23, 2011

science
the volume of nh3 at stp needed to pass into 30 ml of in h2so4 solution to bring down its strength to m/10
July 4, 2011

science
the volume of nh3 at stp needed to pass into 30 ml of in h2so4 solution to bring down its strength to m/10
July 4, 2011

science
the volume of nh3 at stp needed to pass into 30 ml of 1N h2so4 solution to bring down its strength to m/10
July 4, 2011

Physics
During a baseball game, a batter hits a pop-up to a fielder 82 m away. The acceleration of gravity is 9.8 m/s2 . If the ball remains in the air for 6.9 s, how high does it rise? Answer in units of m.
February 21, 2011

math
Draw a triangle ABC with BC=8cm,angleB=50degrees and angleA=50degrees.A lso bisect it.
January 23, 2011

social studies
explain briefly factors which lead to enclosures in england
January 11, 2010

chem.
Ok, so far this is what i've done. A. to get moles of NaOH, i multiplied 0.5062M x 0.01658L=8.39x10^-3, then i divided this number by .010L, i got .8392M B. (8.392x10^-3)x(60.052g HC2H3O2)=.5039g, after this part i got stuck.
March 7, 2008

chem.
A 10.0 mL of vinegar, an aqueous solution of acetic acid (HC2H3O2), is titrated with .5062M NaOH, and 16.58mL is required to reach the equivalence point. A. What is the molarity of the acetic acid? B. If the density of the vinegar is 1.006 g/cm^3, what is the mass percent of ...
March 7, 2008

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