Thursday
May 5, 2016

# Posts by N

Total # Posts: 108

Science
A boy moves on a skateboard at a constant velocity of 3m.s . The combined mass of the boy and the skateboard is 40kg. He catches a bag of flour of mass 5kg that is thrown to him horizontally at 6m.s . Determine the velocity of the boy after catching the bag of flour.
January 16, 2016

Science
the atomic model
January 3, 2016

math
Elizabeth has 1 7/10 as many plants as rosalie has in her garden. If Elizabeth has has 51 plants, how many plants does rosalie have in her garden?
December 17, 2015

Trig
Proving it!(:
December 8, 2015

Trig
(tan/cot)- (sec/ cos) Also I need help with tan sin +cos = sec
December 8, 2015

Trig
(Cos/1-sin)- tan
December 8, 2015

Trig
Tan^2= csc^2 tan^2 -1
December 8, 2015

Trig
(Tan/cot)- (sec/cos)
December 8, 2015

Trig
(Cos/1-sin)- tan
December 8, 2015

english
What are three central assumptions of the american dream
November 2, 2015

english
what photographe is famous for images of Dust Bowl victims
November 2, 2015

english
DO you know who disappeared in the great deppresion
November 2, 2015

english
its a question from my study guide for the moderns 1914-1939
November 2, 2015

english
what two things happened in the prohibition period that had to do with oceans
November 2, 2015

science
Put the following events in order as an impression is processed by crime scene investigators -Make a cast of impression -set up crime scene tape -photograph -Take measurements
October 27, 2015

science
Put the following events in order as an impression is processed by crime scene investigators -Make a cast of impression -set up crime scene tape -photograph -Take measurements
October 27, 2015

science
what type of crime scene is most likely to contain toolmarks
October 27, 2015

physics
An elevator is moving upward with a speed of 11 m/s. Three seconds later, the elevator is still moving upward, but its speed has been reduced to 5.0 m/s. What is the average acceleration of the elevator during the 3.0 s interval? a.5.3 m/s2, upward b.2.0 m/s2, upward c.5.3 m/...
October 17, 2015

Science
Please help!!! You mix 100 millimeters of 10 degrees Celsius water and 100 millimeters of 90 degrees Celsius water. What is the final temperature?
September 20, 2015

Physics
Also, how would you find the work done by gravity on the block? Is that a trick question?
March 11, 2015

Physics
A 100 lb block of ice slides down an incline 5.0 ft long and 3.0 ft high. A worker pushes up on the ice parallel to the incline so that it slides down at constant speed. The coefficient of friction between the ice and incline is 0.10. Find the force exerted by the worker. (I&#...
March 11, 2015

Math
That's what I thought...
March 5, 2015

Math
What is this written in postfix notation: !(!((5-10)*(4-(9/2)) > 60)-(((5*7)/(4/(5+3)))=15))<((4-3)=1)
March 5, 2015

physics
Before starting this problem, review Conceptual Example 7. The force vector A has a magnitude of 97.0 newtons (N) and points due east. The force vector B has a magnitude of 107 N and points 71.4 ° north of east. Find the (a) magnitude and (b) direction of A - B. (Give the...
March 4, 2015

Discrete Math
So, the question I got was: ∀x,(x =/= 0) → (∃!y, xy = 1) I'm really confused about what the "∃!y" means in this context, because the way I'm interpreting the question is: "For all x (when x is not equal to 0), there does not exist...
February 18, 2015

Chemistry
The Haber process is used to synthesize ammonia (NH3) from N2 and H2. The change in standard Gibbs free energy is ΔG°rxn = -16 kJ/mol A. Calculate the equilibrium constant for this reaction B. Calculate the ΔGrxn when you have 2 atm of NH3 (g), 2 atm of H2 (g), ...
February 12, 2015

Chemistry
A flexible balloon containing 1.5 mol of... ideal gas at constant pressure of 1.5 at... 100 °C. Calculate the change in intern...‡ (ΔE) of the gas.
February 11, 2015

Chemistry
A 35.00 mL sample of water at 30.0°C is placed in an open container with an external pressure of 1.00 atm. 30.0 kJ of heat is added to the water sample. The density of water is 1 g/mL. (a) How many grams of liquid water remain at the end of the process? Like, the equation ...
February 11, 2015

Langston Hughes Dream Deferred
Hello! My assignment: Analyze the poetic techniques that allow the poet to communicate his tone. Use the terms from this unit as effectively as you can. Here is my analysis. Does it sound alright? In the poem “Dream Deferred”, Langston Hughes uses a variety of poetic...
December 22, 2014

books
how do we write a blog for this. please explain how to write it. kindly n
December 6, 2014

physics
A box has a mass of 0.345 kg. It is on a very smooth (frictionless) horizontal surface and is acted upon by a force of 3.76 N at an angle of θ = 57.1° with the horizontal. The magnitude of the acceleration of the box is m/s2?
October 2, 2014

physics
a block of mass 3 kg rests on a smooth table and connected to another block of mass 2 kg, after passing over and ideal pulley, the block of mass 2 kg is released. how long does it take the block to travel 80 cm
August 12, 2014

Grammar
Thank you!!
July 13, 2014

Grammar
What kind of paragraph is this? Descriptive, Narrative, or Expository? The place I would like to visit most is heaven. Having the opportunity to be in a place with no sickness, suffering, or misery would be paradise. To eat dinner with Jesus Christ would be like a dream come ...
July 13, 2014

Chemistry
A sample of nitrogen occupies a volume of 300ml under a pressure of 380 torr at -177C. What would be the volume at STP? I know the answer is 430mL but I don't know which equations to use to formulate the calculation.
May 1, 2014

Physics
A charge q1 of -5.00*10^-9C and a charge q2 of -2.00*10^-9C are separated by a distance of 40.0cm. Find the equilibrium position for a third charge of 15.0*10^-9C
April 22, 2014

chemistry
The breakdown of p-nitrophenylphosphate at pH 2.6 is a first order hydrolysis process.. a) 12.5mmol of NPP were dissolved in 200mL of water at 77degrees celcius after 50mins the amount of NPP dropped to 10mmol. Calculate the average rate of this reaction and the rate constant ...
April 12, 2014

health
D. I think it's D that's what makes sense
March 27, 2014

Algebra Question~!
I must ask Reiny, why must they give us the answer? From my understanding this site is merely to help people acquire the answer by giving the helpful hints about how to solve the problem, not provide it to them.
March 15, 2014

MATH
2BOYS:7GIRLS=5BOYS:?GIRLS OPTIONS ARE 24,25,124,15 PLEASE CALCULATE IT.
March 3, 2014

MATH
2BOYS:7GIRLS=5BOYS:?GIRLS PLEASE SOLVE IT. OPTIONS ARE 24,25,124,15
March 3, 2014

MATH
March 3, 2014

science
if you have two samples of the same volume. the mass of sample A is higher than that of sample B. which sample has the greatest density?
February 16, 2014

Science
D is correct
January 23, 2014

health
January 10, 2014

combinatorical mathematics
Is this from brilliant?
December 9, 2013

physics
A stone is dropped from rest at the top of a mine shaft. It takes 58 s for a stone to fall to the bottom of a mine shaft. How deep is the shaft? The acceleration of gravity is 9.8 m/s2 .
October 27, 2013

1500 and 200
October 4, 2013

Math
The m angle is 30 times more than twice angle B. If angle A and angle B form a linear pair find the measurement of both angles.
September 8, 2013

English
I'm working on a complements assignment, and I understand what they are, but I'm a little thrown off by something: Take the sentence, "At first this Saturday had been a warm, sunny day." Saturday is the subject, had been is the verb phrase, and the complement...
August 19, 2013

Calculus
Thank you very much
July 17, 2013

Calculus
How would you go about finding the derivative of y=1/(3x^2)-5/(2x)?
July 17, 2013

Algebra
stop cheating
March 12, 2013

World history; HELP
how did nationalism shape the development of europe in 1800
February 27, 2013

physics
A 0.10 kilogram ball dropped vertically from a height of 1.0 meter above the floor bounces back to a height of 0.80 meter. The mechanical energy lost by the ball as it bounces is aprox. a. 0.080 J b. 0.20 J c. 0.30 J d. 0.78 J
January 28, 2013

math
In an electrical circuit, the current passing through a conductor varies inversely with the resistance. Suppose that when the current is 2A (amperes), the resistance is 115ohms. What is the resistance when the current is 5A ?
November 7, 2012

math
In an electrical circuit, the current passing through a conductor varies inversely with the resistance. Suppose that when the current is 2A (amperes), the resistance is 115ohms. What is the resistance when the current is 5A ?
November 7, 2012

math
In an electrical circuit, the current passing through a conductor varies inversely with the resistance. Suppose that when the current is 2A (amperes), the resistance is 115ohms. What is the resistance when the current is 5A ?
November 7, 2012

math
nevermind i got the answer (:
September 4, 2012

math
complete the pattern starts at 0.22 _ _ _ ends at 0.84 fill in the blanks
September 4, 2012

HEALTH
It's C, my text book says so
August 11, 2012

Chemistry
This is all wrong.
April 20, 2012

Organic Chemistry
Design a procedure to separate a mixture of alcohols containing methanol, ethanol, 1-pentanol. Explain, with references to intermolecular forces, why this separation method is effective in this situation.
March 27, 2012

math
Thank you so much!
February 24, 2012

math
what is the process for solving the following question? John is 72 inches tall and casts a 40 inch shadow. A monument casts a 24 foot shadow. How tall is the monument?
February 24, 2012

English
nist.gov/pml/wmd/metric/upload/1136a.pdf You can try checking this out for the metric system i'm doing the same thing. copy and paste?:p
December 6, 2011

Introduction to Psychology
psychophysis
November 8, 2011

chemistry
When hydrazine (N2H4) is burned in a 259-g brick container, the temperature of the brick increases by 5.13 C. Calculate the quantity of heat released in this reaction. The specific heat of the brick is .840 J/(g C)
October 20, 2011

Chemistry
That's not a balanced equation. It should be Cu + 4HNO3 ==>Cu(NO3)2 + 2NO + 2H2O
September 11, 2011

math
A reciepe for tomato and pasta salad calls for 32 ounces of tomatoes and 4 cups of pasta.the recipe makes 8 Servings.If you only wnat to make enough for 2 servings, how much of each ingredient should you use/
September 1, 2011

physics
a. 1036116.914 b. 2592645.689
November 8, 2010

college
Q. A soccer ball is kicked from the ground. When it reaches a height of 5.74 m, the velocity is v=5.86i+7.50j m/s. a) Determine the maximum height that the ball reaches. b) Determine the total horizontal distance travelled by the ball. c) What is the speed of the soccer ball ...
October 17, 2010

AP US Government
What features of the Constitution make it difficult for government to do or achieve anything? Why were they included? *That is the question, but I am completely lost on how to answer it.
September 15, 2010

chm
1.73*10^-4
June 27, 2010

math
factor 6x^2+17xy+12y^2
June 18, 2010

science
a 50kg crate is lifted to a height of 10 meters how much potential energy does the crate have after being lifted?
June 18, 2010

math word problem
Would that equal out to be 21 cents somehow?
March 3, 2009

math word problem
The city council has decided to add a 0.3% tax on motel and hotel rooms. If a traveler spends the night in a motel room that costs \$55 before taxes, how much will the city recieve in taxes from him?
March 3, 2009

math
If Sally can paint a house in 4 hours, and John can paint the same house in 6 hours, how long will it take for the to pain the house together?
March 3, 2009

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