Thursday
August 21, 2014

Posts by raul


Total # Posts: 68

science
Solar energy is mainly caused due to a) Burning of hydrogen in the oxygen b) Fission of uranium present in the sun c) Fusion of protons during synthesis of heavier elements d) Gravitational contraction
June 19, 2013

science
Hydraulic press is based on a) Archimedes principled b) Bernoulli’s solution c) Pascal/s law d) Reynold’s law
June 19, 2013

science
The heaviest naturally occurring element is a) Uranium b) Iron c) Silica d) Aluminum
June 19, 2013

science
The most malleable metal is a) Sodium b) Lead c) Steel d) Gold
June 19, 2013

science
A boat of mass 40 kg is at rest; A dog of mass 4 kg moves in the boat with a velocity of 10 m/s. what is the velocity of boat? a) 4 m/s b) 2 m/s c) 8 m/s d) 1 m/s
June 19, 2013

science
Silvering of mirror is done by a) AgNO3 b) Ag2O3 c) Fe2O3 d) Al2O3
June 19, 2013

science
4.4 g of CO2 contains how many liters of CO2 at STP ? a) 2.4 litre b) 2.24 litre c) 44 Litre d) 22.4 litre
June 19, 2013

geometry
im still not sure on how to do this
May 8, 2013

geometry
Shalonda notices that when she stands next to the flagpole, she casts a shadow that is 8 feet long and that the flagpole casts a shadow that is 28 feet long. Little Shalonda is 4 feet tall. How tall, to the nearest foot, is the flagpole?
May 8, 2013

reading
Renee has a research paper due in three days. She has set aside two hours to complete this task. What is wrong with this study goal? A. It is not significant and can’t be rewarded. B. The goal is not concrete and specific. C. The time she has allotted is not realistic. D...
April 26, 2013

Chemistry
One reaction of iron with hydrochloric acid is represented by the following thermochemical equation. Fe(s) + 2HCl(aq) ? FeCl2(aq) + H2(g); (Delta)H°= –87.9 kJ How much heat is liberated at constant pressure if 0.215 g of iron reacts with 40.4 mL of 0.579 M HCl? How ...
March 24, 2013

Chemistry
2M +6HCl–>2MCl+3H2 Delta H= -638.0 Kj HClg—>HCl aq= Delta H -74.8 Kj H2+Cl2–>2HCl Delta H -1845.0 Kj MCl3s–> MCl3 aq Delta H -249.0 Kj Use the information above to determine the enthalpy of the following reaction. 2M +3Cl2–>2MCl3 Delta H...
March 22, 2013

Chemistry
kj/C not cal/g that's another question I'm working on
March 22, 2013

Chemistry
At constant volume the heat of combustion of a particular compound is -3378.0 kj/mol.When 1.563 g of this compound ( molar mass of 126.88 g/mol )was burned temp rose 6.991 C. What's the heat capacity of the calorimeter(calorimeter is constant)? Sorry the answer needs to be...
March 22, 2013

Chemistry
At constant volume the heat of combustion of a particular compound is -3378.0 kj/mol.When 1.563 g of this compound ( molar mass of 126.88 g/mol )was burned temp rose 6.991 C. What's the heat capacity of the calorimeter(calorimeter is constant)?
March 22, 2013

Chemistry
A 0.464 gram sample of a metal, M, reacts completely with sulfuric acid according to: M(s) +H2SO4(aq)=MSO4(aq)+H2(g) A volume of 211 mL of hydrogen is collected over water; the water level in the collecting vessel is the same as the outside level. Atmospheric pressure is 756.0...
March 9, 2013

Calculus
At what value of x does the graph of y=9x^(1/3)+x^2 have a point of inflection?
March 4, 2013

Calculus
The position of a particle moving on a horizontal line is given by s(t)=2t^3-15t^2+24t-5, where s is measured in feet and t in seconds. a: What is the initial position of the particle? b: What is the average velocity of the particle on the interval [0,2]?Indicate units of ...
March 4, 2013

chemistry
13.5 mols C X(1 m C3H8/ 3m C)=4.5 m c3h8 4.5 miles c3h8 x 11 atoms in c3h8= 49.5 moles of atoms
March 1, 2013

chemistry
what minimum mass of copper ii nitrate must be added to 70 ml of a .0594 M phosphate solution in order to completely precipitate all the phosphate as solid copper ii phosphate. 2PO4^-3+3Cu(NO3)2-->Cu3(PO4)2+6NO3^-1 I can not come up with the correct answer of 1.17g
March 1, 2013

history
how did the navajo code-talkers aid marines in battle?
February 5, 2013

history
i need concrete answer please
February 5, 2013

history
1.who was the commander of the u.s. navy in the pacific? 2.where did the japanese strike after pearl harbor?
February 5, 2013

history
thank you!
February 2, 2013

history
what do you think contributed to the jump in productivity among american workers during world war 2?
February 2, 2013

history
thank you!
February 2, 2013

history
why did the national debt rise so quickly during world war 2?
February 2, 2013

science
1. Identify the phase or phases of matter (solids, liquids, and gases) that apply to each statement. More than one phase of matter may apply to each statement. a. Molecules do not move around, but vibrate in place b. Has volume but no particular shape c. Flows d. Molecules ...
January 29, 2013

science
how much work was accomplished by the fall?
January 9, 2013

algebra 2
solve each system by substitution 1. 6x-3y=-33 2xty=-1 2. 2x-y=7 3x-2y=10 3. 4x=8y 2x+5y=27
January 8, 2013

algebra 2
solve each system by substitution 1. y=xt1 2x+y=7 2. x=y-2 3x-y=6 3. y=2xt3 5x-y=-3
January 8, 2013

history
thanks
December 18, 2012

history
what conditions were present in the united states after world war 1?
December 18, 2012

history
thanks
December 18, 2012

history
who was the republican candidate who won the election of 1920?
December 18, 2012

us government
how is compromise and majority rule a part of congressional politics?
November 5, 2012

complete subject and complete predicate
this gold ring once belonged to my grandmother
September 23, 2012

chemistry
How many grams of oxygen are collected in a reaction where 245 mL of oxygen gas is collected over water at a temperature of 25 ^\circ {\rm C} and a total pressure of 688 torr
April 29, 2012

Intermediate Algebra
Hi another question I have please. Find the midpoint of F A B? A(6,10) B(-20,14)
April 1, 2012

Intermediate Algebra
The average cab ride cost per mile(x) is given by f(x)=2x+3.50, where x is miles and f(x) is money. A. Find the cost of a 5 mile ride. B. Find the cost of a 3/4 mile ride. C. How many miles can you go in $50?
April 1, 2012

geometry
Shalonda notices that when she stands next to the flagpole, she casts a shadow that is 8 feet long and that the flagpole casts a shadow that is 28 feet long. Little Shalonda is 4 feet tall. How tall, to the nearest foot, is the flagpole?
January 13, 2012

5th math
find longest multiplication combination
November 21, 2011

Accounting
$24000
November 14, 2011

Geometry
wats the areas of a rectangle... base of : 5m high of: (4a+b)m
October 3, 2011

math
use mental math to find each value cost of 8 items at $12.98 each
August 17, 2011

Math
Describe in your own words how to solve a linear equation or inequality
July 27, 2011

chemistry
what this (ar)3d10 3s2 4p3
April 20, 2011

Chemistry
which is more concentrated a 1 liter solution containing 30 g of NaCl or a 1 liter solution containing 30g of KCl
April 4, 2011

US History
Which the bessemer process americans nigth not have Been Abel a Company to build
October 18, 2010

science
the length of the string is 9.984cm.What is the length of the string to the nearest tenth of a centimeter
September 22, 2010

algebra
what does x equal in the equation 3x-35=9x-59
August 24, 2010

math prob.
Why is 72 on monday
July 25, 2010

Thermodynamics and Heat Transfer
A steam pipe is 75 mm external diameter and is 80 m long. It conveys steam at a rate of 1000 kg/h at a pressure of 2 Mpa. The steam enters the pipe with a dryness fraction of 0.98 and is to leave the pipe with a dryness of not less than 0.96. The pipe must be insulated – ...
April 21, 2010

physics
A current I = 16 A is directed along the positive x-axis and perpendicular to a magnetic field. A magnetic force per unit length of 0.15 N/m acts on the conductor in the negative y-direction. Calculate the magnitude and direction of the magnetic field in the region through ...
March 8, 2010

human resource managment
Write a 700- to 1,250-word paper in which you compare and contrast quality management at two organizations in the same industry. • o One organization must compete in the domestic market and one in the global market, such as Southwest Airlines and Lufthansa. • • ...
February 27, 2010

8th grade math
2 hours 37 min and 30sec because 280*3=840 and 840/320=2.625 0.625*60=37.5 thats the time in min the .5 is 30 sec so its 2 hours 37 min and 30 sec hope this helps
October 20, 2009

Math
20%
October 20, 2009

12th grade
26/35
October 16, 2009

8th grade
how fast dose the jet fly at a rate ho many mph?
September 22, 2009

A Voice: Pat Mora
what is the tone in A Voice By Pat Mora
April 23, 2009

philosophy
write a 350-700 word response describing how Socrates’, Plato’s, and Aristotle’s philosophies relate to each other
November 9, 2008

Us History
The Lousiana Purchase removed a major point of contention between the United States and a European power but left many others. Which areas of possible conflict remained, and what were the sources of these potential conflicts?
October 16, 2008

I donth Get it !...US History
Did the differing circumstances of Maryland and Virginia's founding affect the course of their respective development? If so, how?
September 7, 2008

Us History
What problems dogged the early settlements of the Chesapeake region?
September 7, 2008

hystory
Why did Europeans press westward during this period, instead of concentrating in the more easily defended coastal towns?
September 6, 2008

Math
10 4/6
July 5, 2008

algebra
how do i graph this quadratic funtion y=x(squared) + 4x - 4
March 11, 2008

Maths
solve the equation: 4cos2*theta + 3cos*theta + 3 = 0 for values between 0 and 180 degrees If that is cosine squared in the first term, you have a quadratic equation. Normally cosine squared would be written in ASCII as cos^2 Theta.
November 26, 2006

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