Monday

September 26, 2016
Total # Posts: 202

**Math**

When might I need to estimate a sum?

*September 24, 2016*

**Chemistry**

I'm getting 5.65 kJ

*September 5, 2016*

**Chemistry**

I'm still not getting the correct answer.

*September 5, 2016*

**Chemistry**

How much heat is evolved in converting 1.00 mol of steam at 155.0 ∘C to ice at -45.0 ∘C? The heat capacity of steam is 2.01 J/(g⋅∘C) and of ice is 2.09 J/(g⋅∘C).

*September 5, 2016*

**PHYSICS**

The volume of a gas is 450 mL when its pressure is 1.00 atm. If the temperature of the gas does not change, what is the pressure when its volume is changed to 2.00 L?

*May 4, 2016*

**Chemistry**

If 455-ml of 6.0 M HNO3 is used to make a 2.5 L dilution,what is the molarity of the dilution?

*May 3, 2016*

**Chemistry**

Knowing the milk of magnesia contains 8 g% of Mg (OH) 2, we used 1 g milk of magnesia and added 50 mL of 0.100 M HCl, determine the volumeainda of a solution of 0.105 M NaOH to titrate the excess HCl 0.100 M

*April 25, 2016*

**Chemistry**

0.0045 M HNO3 calculate the H3O concentration

*April 24, 2016*

**PHYSICS**

Joule

*April 24, 2016*

**physics **

A sphere of radius 0.500 m, temperature 25.7°C, and emissivity 0.915 is isolated in an environment of temperature 77.0°C. At what rate does the sphere emit thermal radiation? At what rate does the sphere absorb thermal radiation? What is the sphere's net rate of ...

*April 22, 2016*

**PHYSICS**

The initial temperature of a bomb calorimeter is 28.50°C. When a chemist carries out a reaction in this calorimeter, its temperature decreases to 27.45°C. If the calorimeter has a mass of 1.400 kg and a specific heat of 3.52 J/(gi°C), how much heat is absorbed by ...

*April 21, 2016*

**MATH**

Thanks!

*April 20, 2016*

**MATH**

Jennifer flipped a pair of coins 60 times. On 24 occasions, heads appeared on both coins. How is this outcome different from the expected outcome? A) It occurred 6 fewer times than expected. It occurred 4 more times than expected. It occurred 9 more times than expected. It ...

*April 20, 2016*

**Chemistry**

Calculate the boiling temperature of a 0.50 M solution of sucrose. Assume that the concentration is 0.50 m.

*April 18, 2016*

**soanish**

Do you mean SPANISH? Use the link Ms. Sue provided. It is very helpful.

*March 27, 2016*

**Lesson 13: Matter and Energy Unit Test**

You're awesome, dude! Thanks!

*March 14, 2016*

**Algebra**

Thank you!

*March 8, 2016*

**Algebra**

The time it takes to cover the distance between two cities by car varies inversely with the speed of the car. The trip takes 15 hours for a car moving at 54 mph. What is the speed of a car that makes the trip in 27 hours?

*March 8, 2016*

**Social Studies**

The answer is D.

*February 29, 2016*

**chemistry**

How many moles of carbon dioxide will be created by the complete combustion of 2.25 moles of ethane?

*February 2, 2016*

**History**

What was George Washington Plunkitt’s position in the governance of New York City.

*January 25, 2016*

**Social Studies**

Thanks but my teacher said Jacob Perkins

*January 20, 2016*

**Social Studies**

Who was the first person to receive a patent? Benjamin Franklin Jacob Perkins Samuel Perkins ** John Calhoun

*January 20, 2016*

**Algebra**

The perimeter of the rectangle below is 74 units. Find the length of side AB . Write your answer without variables. DC (top) 4z-1 CB (right side) 3z+3 AB (bottom) unknown

*December 8, 2015*

**History**

The Articles of Confederation and the US Constitution are the two documents under which American has been governed since 1781. Describe the essential elements of each, their similarities and how their major differences.

*December 7, 2015*

**Math**

A line passes through the point 10,−1 and has a slope of 3/2. Write an equation in slope-intercept form for this line.

*November 28, 2015*

**Algebra**

Mr. Wright has a class of 15 students. He can spend $23 on each student to buy math supplies for the year. He first buys all of his students calculators, which costs a total of $69.45. After buying the calculators, how much does he have left to spend on each student?

*November 25, 2015*

**Physics**

A CAR TRAVELLING AT 2OMS ACCELERATION UNIFORMLY AT 3MS^2 CACULATE IT VELOCITY AFTER 3OS KM/HR

*November 6, 2015*

**Physics**

A shell is fired from the ground with an initial speed of 1.62 ✕ 103 m/s at an initial angle of 58° to the horizontal. (a) Neglecting air resistance, find the shell's horizontal range.

*September 28, 2015*

**Spanish**

El verano es uno de mis tiempos favoritos del año. Me encantan el tiempo y todas las actividades que pueden ser hechas en el venía . En este ensayo hablaré de lo que solía hacer en el verano cuando era un niño. Entonces hablaré de lo ...

*July 13, 2015*

**Spanish**

I'm sorry I should have included the paragraph that I wrote. what I had posted was just what i needed to correct. here is the paragraph that I wrote. in spanish and english. El verano es uno de mis tiempos favoritos del año. Me encantan el tiempo y todas las ...

*July 13, 2015*

**Spanish**

I was hoping that I could get some to look my essay and tell me the proper tenses of the verbs. In the first paragraph the imperfect tense of the verb and in the second paragraph the need to be preterit tense. If you could help that would be great. Cuando era un niño ...

*July 13, 2015*

**Spanish**

Thanks again Sra

*July 6, 2015*

**Spanish**

Thank you so much for the help. I have made correction based on your feedback and would appreciate it if you would look over it one more time. El verano es uno de mis tiempos favoritos del año. Me encantan el tiempo y todas las actividades que pueden ser hechas en el ...

*July 6, 2015*

**Spanish**

I was hoping that someone could prof read my essay and check for proper uses of words, grammar, spelling, and conjugations of words. the first three paragraphs are what I have to write in spanish. the three paragraphs below that is the english version of what I was trying to ...

*July 6, 2015*

**Chemistry**

A is a solution of hcl containing 7.30gdm^-3 and B is a solution of X2CO3 containing 10.6gdm^-3.calculate the concentration of A in Moldm^-3

*June 29, 2015*

**Consumer math**

0.23 + 0.21 = 0.44 * 18000 = 7920/12= 660 Thank you Ms.Sue! You are awesome and a big help. Thank you, thank you!

*June 4, 2015*

**Consumer math**

Cathy budgets 23% of her income for housing and 21% of her income for food. If she earns $18,000 per year, how much must she budget monthly for housing and food? a. $792 b. $660 c. $7,920 d. $61.30

*June 4, 2015*

**Consumer math**

Ed borrowed 1,500 for 4 months at 13.5 %. How much did he have to pay back under an add-on plan?

*June 3, 2015*

**Math**

Zoe's gross income is $16,960. His medical expenses for the year amounted to $812.35. If he can deduct only the amount over 7 1/2% of his gross income for medical expenses, how much can he deduct for medical expenses?

*May 13, 2015*

**Math**

$175.50*6=$1053 52/1053=$20.25 Answer: $20.25 (A) $150*6=$900 52/$900=$17.31 Answer:$17.31 (D)

*May 13, 2015*

**Math**

Rad makes six payments a year of $175.50 for his auto insurance. How much must he budget weekly to cover this fixed expense? a. $20.25 b. $43.88 c. $1,053 d. $87.75 Rod makes six payments a year of $150 for his auto insurance. How much must he budget weekly to cover this fixed...

*May 13, 2015*

**Math**

Carl borroowed $2,500 for six months at an annual interest rate of 11%. How much must he repay at the end of six months? a. $275 b. $2,637.50 c. $87.50 d. $2,762.50 Please show all steps needed to get answer in simple terms.

*May 13, 2015*

**Consumer math**

Determine the cost of a taxi trip of 9 2/3 miles if the fare is $1.10 for the first 1/6 mile and $.20 for each additional 1/6 mile (or fraction). a. $11.90 b. $11.20 c. $12.50 d. $12.80 Determine the cost of a taxi trip of 9 miles if the fare is $1.10 for the first 1/6 mile ...

*April 22, 2015*

**books**

I need help with this question, I have to write a paragraph to support an opinion and I don't understand this question. When Scrooge tells Marley that Marley was always a good man of business. In Act 1 scene 3 of a Christmas Carol Scrooge and Marley, Marley responds ...

*March 26, 2015*

**Language Arts**

ok for the first question would the answer be B. Second question would it be A. thanks

*March 10, 2015*

**Language Arts**

Please check my answers to these questions: Which of the following is best defined for drama? story with props, story written be performed by actors, and story with a happy ending. My answer is A. Second question What term describes construction onstage that suggest time and ...

*March 10, 2015*

**Physics**

A solid cylinder is pivoted at its center about a frictionless axle. A force is applied to the outer radius of 1.27 m at an angle of 30 ◦ above the tangential and exerts a force of 5 N. A second force is applied by wrapping rope around the inner radius of 0.576 m, which ...

*February 28, 2015*

**Physics**

A solid cylinder is pivoted at its center about a frictionless axle. A force is applied to the outer radius of 1.27 m at an angle of 30 ◦ above the tangential and exerts a force of 5 N. A second force is applied by wrapping rope around the inner radius of 0.576 m, which ...

*February 26, 2015*

**Business math**

Lots of us here

*February 21, 2015*

**Physics Dynamics**

m= 0.69 a=mg-g a=(0.69)(9.80)-9.80 a=-3.038 m/s^2 Acceleration is 3.038 m/s^2 downward

*February 12, 2015*

**Geometry**

what is the area of triangle ABC? I am sorry i didn't complete the question earlier.

*February 3, 2015*

**Geometry**

Line CD is the perpendicular bisector of line AB. E and F are midpoints. If AB=6 and CZ=4, find the triangle ABC. Z is the centroid.

*February 3, 2015*

**math**

5+c/9=31 9-n/5=19

*January 28, 2015*

**Chemistry**

I keep getting 5651.072 kJ.

*January 21, 2015*

**physics**

1.65

*January 20, 2015*

**Physics**

Initially sliding with a speed of 2.5 m/s, a 2.0 kg block collides with a spring and compresses it 0.35 m before coming to rest. What is the force constant of the spring?

*December 30, 2014*

**Physics **

The work W0 accelerates a car from 0 to 20 km/h. How much work (in terms of W0) is required to accelerate the car from 20 km/h to 100 km/h?

*December 29, 2014*

**chemistry**

Using the following thermochemical data, what is the change in enthalpy for the following reaction? 2H¿(g) + 2C(s) + O¿(g) d C¿HÂOH(l)? C2H5OH(l) + 2O2(g) d 2CO2(g) + 2H2O(l), DH = -875 kJ C(s) + O¿(g) d CO¿(g), DH = -394.51...

*December 9, 2014*

**algebra**

mrs scott bought some silk at $29.50 a yard and had $12 dollars left. if she had bought twice as much silk at $19.75 cent a yard she would have need $28 more to pay for it. how many yards did she buy and how much money had she

*November 24, 2014*

**8th Grade Math**

The answer is B. Any Whole number, integer and rational number is never irrational.

*October 13, 2014*

**physical**

A body of weight 150N is supported by a thin cord attached to a point in the ceiling. Another cord is attachedto the weight and pulled horizontally until the supporting cords makes an angle of 30 degree with the vertical. Draw the diagram of the arrangement and calculate the ...

*October 12, 2014*

**Pre-Calc**

A quadratic function has its vertex at the point (-5,-2). The function passes through the point (-8,-10). Find the quadratic and linear coefficients and the constant term of the function.

*September 24, 2014*

**Healthcare**

Compare the similarities and differences of the principles of communication you learned in Week One with the major components of health communication you learned in Week Eight. What observations do you have from your comparison? Include a list of the principles of ...

*July 15, 2014*

**English 4 help **

In this course,you studied literary works from the romantic period,the Victorian era,and the modern era.Describe the common themes from each era.Then explain the main elements of the historical context that contributed to the themes in each era. All I need is help on how to ...

*May 26, 2014*

**Algebra 2**

Which cosine function has maximum of 4, a minimum of -4, and a period of 2pi/3? A. y=4 cos 3 theta B. y= 4 cos 2 theta/3 C. y=4 cos theta/3 D. y=4 cos 3 theta

*May 25, 2014*

**Algebra 2**

Simplify the trigonometric expression. sin^2 theta / 1-cos theta A. 1+cos theta B. sin theta C. 1-sin theta / cos theta D. 1+sin theta / cos theta

*May 25, 2014*

**Algebra 2**

What is the theoretical probability of rolling a sum of 6 on one roll of two standard number cubes? A. 1/9 B. 5/36 C. 1/12 D. 1/6

*May 24, 2014*

**Algebra 2**

Write an equation for the translation of y=5/x that has the asymptotes x=6 and y=7.

*May 24, 2014*

**Algebra 2**

What is the 20th term of the sequence that begins -2,4,-8,16.....?

*May 24, 2014*

**Algebra **

What are the period and amplitude of the function y=2sin4 theta? A. pi/2 and 2 B. pi and 4 C. pi/2 and 4 D. pi/2 and 1 I think the answer is A. Am i correct?

*May 24, 2014*

**Math - Trigonomety**

A plane is flying at a height of 1000 feet. A passenger on the plane sees a tree and realizes the angle of depression to the top of the tree is 15 degrees and the angle of depression to the bottom of the tree is 25 degrees. How tall is the tree?

*April 27, 2014*

**Chemistry**

what would be the molality of a solution if 71g of Cl2 were added to 400 mL of acetone (D=0.788 g/mL)

*March 18, 2014*

**math**

a box contains 22 coins consisting of quarters and dimes. the total value of the coins is $3.55. determine the number of quarters and the number of dimes in the box?

*January 12, 2014*

**Algebra**

Write the equation of the line in standard form: (-3, 6); m = 1/2 (1, 0) & (-5, 3) (-5, -5) & (-1, 3)

*January 8, 2014*

**Math**

Write an equation in slope-intercept form, point-slope, or standard form for the line with the given information. Explain why you chose the form you used. a. Passes through (-1, 4) and (-5, 2)

*January 8, 2014*

**us history**

I need a word that means.. a governments position on an issue

*November 12, 2013*

**Math**

Find two numbers the exact answer is between 6x7,381

*September 24, 2013*

**Chemistry**

If 10.11 g of limestone decomposes by heat to give 8.51 g of solid calcium oxide and carbon dioxide gas, what is the mass of carbon dioxide produced?

*September 19, 2013*

**College Algebra**

I have no idea how to do this, and nobody in my family knows how to either. I have to determine the domain of the following function. f(x)=5/(3x-7)

*August 25, 2013*

**Government**

The first American voters were only white, male ---------s. What is the blank word?

*July 6, 2013*

**Government**

People who believe voting is important have high political ----c-c-. What's the missing word? Thanks.

*July 6, 2013*

**US Government **

Any person currently in --i- cannot vote. What is the blank word? Thanks.

*July 6, 2013*

**chemistry**

How many grams of ammonium fluoride are required to neutralize 972 'm of 0.00327 M sulfuric acid

*February 27, 2013*

**physic**

@bobpursley: 9.8*100 is actually 980, not 9800

*February 26, 2013*

**Mathmatics**

this is caleb and never mind this question

*February 19, 2013*

**Physics**

A 2563-kg van runs into the back of a 826-kg compact car at rest. They move off together at 8.5 m/s. Assuming the friction with the road is negligible, calculate the initial speed of the van.

*January 15, 2013*

**Physics**

You need to move a 128-kg sofa to a different location in the room. It takes a force of 99 N to start it moving. What is the coefficient of static friction between the sofa and the carpet?

*January 15, 2013*

**math**

What is equal to 435 inches

*January 3, 2013*

**Basic Phsyics**

A projectile is fired such that the vertical component of its velocity is 49 m/s. The horizontal component of its velocity is 60 m/s. a) how long does the projectile remain in the air? b) what horizontal distance does it travel?

*December 18, 2012*

**Basic Physics**

A baseball is hit 1.3 m above home plate. The bat sends it off at an angle of 30 degrees above the horizontal at a speed of 45.0 m/s. The outfield fence is 100 m away and 11.3 m high. Does the ball clear the fence?

*December 18, 2012*

**Basic Physics**

While standing on an open bed of a truck moving at 35 m/s, and archer sees a duck flying directly overhead. The archer shoots an arrow at the duck and misses. The arrow leaves the bow with a vertical velocity of 98 m/s. a) how long does it remain in the air b) the truck ...

*December 18, 2012*

**Basic Physics**

2.0 s

*December 18, 2012*

**Basic Physics**

A shoe flung into the air such that at the end of 2.0 m/s it is at its maximum height moving at 6.0 m/s. How far away will it be from the thrower when it returns to the launch altitude.

*December 18, 2012*

**Physics**

Early skeptics of the idea of a rotating Earth said that the fast spin of Earth would throw people at the equator into space. The radius of Earth is about 6400 km. Show why this objection is wrong by determining the following information. (a) Calculate the speed of a 94-kg ...

*December 3, 2012*

**Spelling 4th grade**

Down is to dive as up is to ____________?

*November 26, 2012*

**Physics**

You are driving a 2570.0-kg car at a constant speed of 14.0 m/s along a wet, but straight, level road. As you approach an intersection, the traffic light turns red. You slam on the brakes. The car's wheels lock, the tires begin skidding, and the car slides to a halt in a ...

*November 17, 2012*

**Physics**

A 225-kg crate is pushed horizontally with a force of 690 N. If the coefficient of friction is 0.20, calculate the acceleration of the crate.

*November 17, 2012*

**Physics**

You are driving a 2570.0-kg car at a constant speed of 14.0 m/s along a wet, but straight, level road. As you approach an intersection, the traffic light turns red. You slam on the brakes. The car's wheels lock, the tires begin skidding, and the car slides to a halt in a ...

*November 17, 2012*

**Physics**

A 1.31-kg block slides across a rough surface such that it slows down with an acceleration of 1.39 m/s2. What is the coefficient of kinetic friction between the block and the surface?

*November 17, 2012*