# Abraham

Popular questions and responses by Abraham
1. ## 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

2. ## 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.

3. ## 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.

4. ## Math

Solve this equation p square-10p-24=0

5. ## Physics

A rod extending between x = 0 and x = 17.0 cm has uniform cross-sectional 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

6. ## 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.

7. ## 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

8. ## 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?

9. ## 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

10. ## 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?

11. ## 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

12. ## 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

13. ## math

using rounding or compatible numbers,which numbers would you choose to estimate the exact product of 25 times 25.

14. ## 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

15. ## 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?

16. ## 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.

17. ## Civics

How can good leaders protect the interest of their followers

18. ## 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?

19. ## 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?

20. ## math

i have 20kg of wood.i brun 65% of it and keep the rest,how much do i use for bruning.

21. ## chemistry

What is the ∆G for the following reaction under standard conditions (T = 298 K) for the formation of NH4NO3(s)?

22. ## maths

how many of the integers from 1 to 200 contains the digit 1 at least twice?

23. ## 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.

24. ## 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

25. ## Economic Math

Suppose the supply and demand for milk is described by the following equations: Qd=600-100P, 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

(5X+5)^2=125

27. ## 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?

28. ## 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?

29. ## 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.

30. ## 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?

31. ## 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

32. ## 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

33. ## 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

34. ## 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?

35. ## 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?

36. ## 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

37. ## english

The meanings of blow up,account for,call off,talk into and drag on.

38. ## biology

describe the events that take place in the eye when you come from a dark room to the outside where there is light

39. ## social studies

what happened as a result of the removal of the priest

40. ## 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

41. ## 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 mol-1. What is the compound's: Empirical Formula:----- Molecular

42. ## 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

43. ## history

What elementary school or high school did Paul Dunbar, the poet, go to?

list the next 7 polygons after pentagon..

45. ## Precalculus

solve the equations for x a) e^2x - e^x - 30 = 0 b)1-3/n^x = 5

46. ## 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?

1. ## Science

Am finding it difficult to answer.

posted on July 22, 2020
2. ## Social studies

What event led to the first shots being fired at the battles of Lexington and Concord? *

posted on May 12, 2020
3. ## Social Studies

What was the significance of the bottle at Fort necessity

posted on May 12, 2020
4. ## Math

8*10=80

posted on April 9, 2020
5. ## chemistry

Because it gets to fat and gets destroyed by the smallest prick penetration

posted on March 18, 2020
6. ## maths

I love you men it so important question thank you mfk

posted on January 13, 2020
7. ## Geometry

posted on November 14, 2019
8. ## can some one pleasee help me!!!

Thanks for finally talking about >The molecular structures of two ‘penicillin-like’ compounds, A and B. in the

posted on November 11, 2019
9. ## English

posted on June 4, 2019
10. ## physics

Solution to it

posted on April 24, 2019
11. ## physics

The above question

posted on April 24, 2019
12. ## physics

pls help am answer this question

posted on March 12, 2019
13. ## 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
14. ## 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
15. ## 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
16. ## Chemistry

Dear andjerlkj, YG^trf5ygjtrfygboifvtrdcfg kind regards, Abrahama, HONONRS Cchemlk sutdent

posted on November 26, 2017
17. ## Algebra

12.5 percent

posted on November 14, 2017
18. ## Operations Research

posted on September 25, 2017
19. ## Physics

+8

posted on October 15, 2016
20. ## Career

No

posted on October 15, 2016
21. ## maths

Yes I did,thanks again Ms.

posted on May 27, 2016
22. ## maths

OK I see, thanks you so much.

posted on May 26, 2016
23. ## 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
24. ## college algebra2

4861 sq.in

posted on April 24, 2016

Can't wait for college then the NBA.

posted on September 17, 2015
26. ## math

48

posted on January 16, 2015
27. ## 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
28. ## 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
29. ## CHEMISTRY

thax

posted on February 2, 2011
30. ## algebra

13d = _ min

posted on April 3, 2010
31. ## 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
32. ## physics

thank you

posted on March 5, 2008
33. ## Pre-Algebra

-3W-6R+6

posted on March 4, 2008
34. ## Pre-Algebra

-7P+21+2P=24 -5P+21=24 -5P=3 P=-3/5

posted on March 4, 2008
35. ## Pre-Algebra

11Y^2-7Y+12

posted on March 4, 2008