Abraham
Popular questions and responses by Abraham
Science
A block and tackle having a velocity ratio of 5 is used to raise a load of 400N through a distance of 10m. If the workdone against friction is 100J. Calculate 1. Efficiency 2. The effort applied
asked on July 22, 2020 
English
As a senior prefect of your school,write a speech you would give to fresh students telling them,at least, three things that can make their stay in the school successful.
asked on June 4, 2019 
Chemistry
Calculate the mass of NaOH needed to prepare 100ml of 0.20molar solution. B. Calculate the mass of solid KHP needed to react completely with 25ml of a 0.20m NaOH solution. C. Calculate the molar amount of solid KHP used to neutralize the NaOH solution.
asked on January 7, 2020 
Math
Solve this equation p square10p24=0
asked on November 3, 2019 
Physics
A rod extending between x = 0 and x = 17.0 cm has uniform crosssectional area A = 7.60 cm 2 . It is made from a continuously changing alloy of metals so that along its length its density changes steadily from 2.00 g/cm 3 to 18.7 g/cm 3 .(a) Identify the
asked on September 26, 2012 
Chemistry
Nh3+Cuo=N2+Cu+H2O, 18.1g of nh3 and 90.4g of CuO made to react. (a). Determine the limiting reagent. (b). Which reactant is in excess? (c). Calculate the mass of Cu that forms. (d). Calculate the volume in liter of n2 that form at STP.
asked on January 24, 2020 
Science
A uniform rod 1.8m long and of mass 10kg rest horizontally on support at its ends. If a weight of mass 3kg is attached at a point 1.2m from one end, find the reactions from the support
asked on June 8, 2020 
algebra
On Monday, 12 students were absent, which is 8% of all the students in the class. How many students are in the class? How would I set this problem up?
asked on May 11, 2020 
physics
A bullet of mass0.01kg is fired with a velocity of 200m/s in to a sack of sand of mass 9.99kg which is swinging from rope .At the moment the bullet hits, the sack has a velocity of 0.2m/s. Workout the velocity of bullet and sand just after the bullet hits
asked on January 10, 2020 
pre calculus
janet worked on a garden shaped like a triangle with a base that is 5 m less than twice the height. If the area of the garden is 90 m^2, how long is the base and the height?
asked on November 27, 2012 
Physics
Given the displacement vectors A = (7.00  1.00 + 3.00 ) m and B = (6.00 + 5.00  3.00 ) m, find the magnitudes of the following vectors and express each in terms of its rectangular components. (a) C = A  B (b) D = 3A + B
asked on September 26, 2012 
chemistry
give enthalpy profile diagrams to illustrate endothermic and exothermic reactions. include an explanation of cocepts such as enthalpy change, activation energy and catalysts.explain how the process of bond breakage and formation determine the enthalpy
asked on February 2, 2011 
math
using rounding or compatible numbers,which numbers would you choose to estimate the exact product of 25 times 25.
asked on January 21, 2011 
Biology
If water were not a polar molecule and could not form hydrogen bonds, how would this change the structure and density of ice? Why would change? How would this affect the organisms living in lakes and ponds? 1. It would be heavier than water and sink. 2. If
asked on November 14, 2006 
Science
The titration of 25.00ml of 0.1000m hypochlorous acid (3.5x10^8) with 0.1500m NaOH. (a). What is the pH before any acid is added (b). What is the PH when 25.00ml of NaOH has been added?
asked on January 4, 2020 
Physics
A boy can throw a ball a maximum horizontal distance of R on a level field. How far can he throw the same ball vertically upward? Assume that his muscles give the ball the same speed in each case.
asked on December 12, 2019 
Civics
How can good leaders protect the interest of their followers
asked on May 15, 2019 
History of the Americas
1. Do you think that the Radical Republicans made the right choices after the Civil War? Why or why not? 2. In what ways did the Reconstruction fail? 3. What does the struggle between the legislative and executive branch mean to you?
asked on August 26, 2018 
Algebra
Mr. Jones brought a use car for $2400 and sold it for $2700. What was the percent of profit for Mr. Jones in selling the car?
asked on November 14, 2017 
math
i have 20kg of wood.i brun 65% of it and keep the rest,how much do i use for bruning.
asked on June 11, 2017 
chemistry
What is the ∆G for the following reaction under standard conditions (T = 298 K) for the formation of NH4NO3(s)?
asked on December 12, 2016 
maths
how many of the integers from 1 to 200 contains the digit 1 at least twice?
asked on May 26, 2016 
maths
a number is chosen at random from the numbers:1 to 20. Find the probability that the number chosen is a multiple of 2 and a multiple of 5.
asked on May 26, 2016 
Arithmetic progession
The third term of an A.P is 10times more than the second term. Find the sum of the eight and fifteen term of the A.P if the seventh term is seven times the first term
asked on August 13, 2015 
Economic Math
Suppose the supply and demand for milk is described by the following equations: Qd=600100P, Qs = 150+150P, where P is price in dollars . Qd is quantity demanded in millions of gallons per year. A. Create supply and demand tables corresponding to these
asked on May 8, 2015 
math
(5X+5)^2=125
asked on April 7, 2015 
Physical science
a mass of 10g of sodium nitrate is dissolved in 10ml of water at 80 degrees celsius, at what temperature will it start to precipitate?
asked on January 6, 2015 
math
question 1 john has nickels quarters and dimes totaling $3.30,21 coins in all,with one more nickel than dimes.How many of each type of coin does he have?
asked on June 9, 2013 
math
Find three consecutive integers such that the square of the third minus the first is equal to 2 more than 5 times the second.
asked on November 27, 2012 
Physics
A force F = (5i − 4j) N acts on a particle that undergoes a displacement Δr = (5i+j)m . (a) Find the work done by the force on the particle. (b) What is the angle between F and Δr?
asked on October 6, 2012 
Physics
A block of mass 3.00 kg is pushed up against a wall by a force P that makes an angle of = 30.0° angle with the horizontal as shown below. The coefficient of static friction between the block and the wall is 0.25. (a) Determine the possible values for
asked on September 26, 2012 
Houston community college
A projectile is fired from ground level with an initial velocity of 50m/s and an initial angle of 30degree. Assuming g= 9.8 m/s*2, find: (a) The projectile total time of flight. (b) The maximum height attained (c) The total horizontal traveled (d) The
asked on September 24, 2012 
Physics
A projectile is fired from ground level with an initial velocity of 50m/s and an initial angle of 30degree. Assuming g= 9.8 m/s*2, find: (a) The projectile total time of flight. (b) The maximum height attained (c) The total horizontal traveled (d) The
asked on September 24, 2012 
Mura
Could anyone help me with this question...Mecury has a density of 13.6g/cm^3 at 20°C.What would be the density of mecury at 100°C?
asked on March 15, 2012 
Physics
Assume that you havea mass of 65 kg. I you are standing on the surface of Earth, What is the force of gravitational attraction between you and the earth?
asked on January 24, 2012 
math
1)An object is suspended from two points on the ceiling 25cm apart by two pieces of rope of lengths 27cm and 24 if the object exerts from a downward force 200N then find the tension in each rope 2)An airplane heading north at 550km/h encounters a wind of
asked on September 17, 2011 
english
The meanings of blow up,account for,call off,talk into and drag on.
asked on September 15, 2011 
biology
describe the events that take place in the eye when you come from a dark room to the outside where there is light
asked on September 15, 2011 
social studies
what happened as a result of the removal of the priest
asked on February 22, 2011 
CHEMISTRY
GIVE ENTHALPY PROFILE DIAGRAMS TO ILLUSTRATE ENDOTHERMIC AND EXOTHERMIC REACTIONS.INCLUDE AN EXPLANATION OF CONCEPTS SUCH AS ENTHALP CHANGE, ACTIVATION ENERGY AND CATALYSIS. EXPLAIN HOW THE PROCESSES OF BOND BREAKKAGE AND FORMATION DETERMINE THE ENTHALPY
asked on February 1, 2011 
Chemistry
Combustion analysis of 0.343 g of a compound containing C, H, and O produces 0.753 g of CO2 and 0.411 g of H2O. Mass spectral analysis shows that the compound has a molar mass around 120 g mol1. What is the compound's: Empirical Formula: Molecular
asked on March 25, 2010 
Math
If a+b is less than c+d, and d+e is less than a+b than e is (1)less than c (3)less than d (2)equal to c (4)greater than d
asked on September 20, 2009 
history
What elementary school or high school did Paul Dunbar, the poet, go to?
asked on February 26, 2009 
6th grade geometry
list the next 7 polygons after pentagon..
asked on February 25, 2009 
Precalculus
solve the equations for x a) e^2x  e^x  30 = 0 b)13/n^x = 5
asked on July 5, 2010 
physics
a cork floats on the water as a water wacve passes by, what happens to the cork? will the cork's vibrational frequency be related to the water wave's frequency and if so, how?
asked on March 4, 2008

Science
Am finding it difficult to answer.
posted on July 22, 2020 
Social studies
What event led to the first shots being fired at the battles of Lexington and Concord? *
posted on May 12, 2020 
Social Studies
What was the significance of the bottle at Fort necessity
posted on May 12, 2020 
Math
8*10=80
posted on April 9, 2020 
chemistry
Because it gets to fat and gets destroyed by the smallest prick penetration
posted on March 18, 2020 
maths
I love you men it so important question thank you mfk
posted on January 13, 2020 
Geometry
answer
posted on November 14, 2019 
can some one pleasee help me!!!
Thanks for finally talking about >The molecular structures of two ‘penicillinlike’ compounds, A and B. in the
posted on November 11, 2019 
English
Answer
posted on June 4, 2019 
physics
Solution to it
posted on April 24, 2019 
physics
The above question
posted on April 24, 2019 
physics
pls help am answer this question
posted on March 12, 2019 
Chemistry
(1.5e25)*(44.01) then divided 6.02*10^23 from both sides The answer would be 1096.56 g CO2
posted on December 9, 2018 
i don't understand this math
i agree with zena .1.c , 2.d, 3.b,4.c , i tell you 100%
posted on September 17, 2018 
Physical Science
No system is completely closed off from its surroundings. Which represents a system that is almost completely closed?
posted on December 7, 2017 
Chemistry
Dear andjerlkj, YG^trf5ygjtrfygboifvtrdcfg kind regards, Abrahama, HONONRS Cchemlk sutdent
posted on November 26, 2017 
Algebra
12.5 percent
posted on November 14, 2017 
Operations Research
answer to farm management
posted on September 25, 2017 
Physics
+8
posted on October 15, 2016 
Career
No
posted on October 15, 2016 
maths
Yes I did,thanks again Ms.
posted on May 27, 2016 
maths
OK I see, thanks you so much.
posted on May 26, 2016 
maths
Yes i did. The figure that contains the digit 1 twice is only the number 11. I hope my answer is right.
posted on May 26, 2016 
college algebra2
4861 sq.in
posted on April 24, 2016 
8th grade
Can't wait for college then the NBA.
posted on September 17, 2015 
math
48
posted on January 16, 2015 
Math
an rope 10 feet long is tied to the top of a pole? if the rope is pulled tightly how for form the bottom of the pole should the rope be staked to the ground?
posted on November 5, 2013 
physic
c)I think maybe $8.00 is right .A fossil's monetary worth is truly only equal to what a collector is willing to pay for it. Still, there are some key things to consider in order to know how to price a fossil, whether you are a collector or a dealer. I
posted on May 6, 2011 
CHEMISTRY
thax
posted on February 2, 2011 
algebra
13d = _ min
posted on April 3, 2010 
chemistry
1.write the balanced equation 2.find the number of moles of N2O 3.find the molar ratio 4.if the ratio is 1:1 than the number of moles for N2O and oxygen will of the same value 5.find the mass using n=m/MM 6. rearrage the equation to get m=n*MM and you will
posted on March 26, 2010 
physics
thank you
posted on March 5, 2008 
PreAlgebra
3W6R+6
posted on March 4, 2008 
PreAlgebra
7P+21+2P=24 5P+21=24 5P=3 P=3/5
posted on March 4, 2008 
PreAlgebra
11Y^27Y+12
posted on March 4, 2008