Monday

April 20, 2015

April 20, 2015

Total # Posts: 2,926

**Physics**

A small rocket weighs 14.7 newtons. The rocket is fired from a high platform but it's engine fails to burn properly. The rocket gains total upward force if only 10.2 newtons. At what rate and in what direction is the rocket accelerated?
*February 19, 2014*

**Algebra 1**

What is point slope form? How is it different than slope intercept form? Which one is better?
*February 18, 2014*

**Physical Science**

In what direction does heat flow? Why do particles of matter transfer thermal energy in this direction?
*February 17, 2014*

**Chemistry 106 ch 11**

Calculate the heat released when 73.5 g of steam at 122.0 C is converted to water at 39.0C. Assume that the specific heat of water is 4.184 J/g C, the specific heat of steam is 1.99 J/g C, and change in heat vap =40.79 kJ/mol for water.
*February 15, 2014*

**Math help polynomial**

multiply the following polynomial -3x(y^2+2y^2) answer choices 3xy^2-6xy^2' -3xy^2-gxy^2 -3xy^2+5y^2 -9xy^2 The last one was the answer. Can you tell me how the answer was solved? Thanks!
*February 15, 2014*

**Algebra 1**

How do you write the equation of a line if you have two points? Please use detail and give step by step instructions: trying to study for a test and I don't understand this concept.
*February 13, 2014*

**Physics**

If a salmon swims straight upward in the water fast enough to break through the surface at a speed of 5 meters per second, how high can it jump above water?
*February 9, 2014*

**Science**

Help, I am not sure I am doing this right. Are these correct? 1. What is the acceleration of a 1,500-kg elevator with a net force of 10,500 N? 2. What net force is needed to accelerate a 60-kg cart at 12 m/s 2? I think it is 720N
*February 7, 2014*

**Science**

The action and reaction forces in any situation will always be ----- and ----.
*February 6, 2014*

**bio -energy **

in what chemical form is glucose when it enters the Krebs Cycle?
*February 5, 2014*

**Biology**

a variable whose variation does not depend on that of another.
*February 5, 2014*

**US History**

Do you think the U.S. should have joined the League of Nations with no restrictions to its obligations under Article X? Why or why not? I think I can answer the question; I just need help from someone who can explain what they're asking here? Please and thank you.
*February 4, 2014*

**Physical Science**

Explain the energy conversions that occur as a basketball falls, hits the ground, and bounces back up. Ignore frictional forces.
*February 2, 2014*

**Algebra 1**

The length of a rectangle is 4 cm more than the width. The area of the rectangle is 77 cm squared. Find the width and length. A) 7 cm, 11 cm B) 4 cm, 8 cm C) 6 cm, 8 cm D) 6 cm, 10 cm
*January 31, 2014*

**Physical Science**

How does the potential energy of an object change when its height is tripled?
*January 29, 2014*

**Physical Science**

A machine you designed has an efficiency of 60%. What happens to 60% of the work put into the machine, and what happens to the other 40%?
*January 28, 2014*

**Physical Science**

A 50.0-kg wolf is running at 10.0 m/sec. What is the wolf's kinetic energy? A) 5 J B) 500 J C) 5000 J D) 250 J E) 2500 J
*January 27, 2014*

**Algebra 1**

The Tigers won twice as many football games as they lost.They played 96 games. How many games did they win?
*January 22, 2014*

**science**

Three people push a piano on wheels with forces of 130 N to the right, 150 N to the left, and 165 N to the right. What is the strength and direction of the net force on the piano?
*January 21, 2014*

**English Grade 11**

I haven't read those, but I will now!
*January 21, 2014*

**English Grade 11**

So far I have that Auden thinks that a hard-working and sociable man is normal/ideal in society.
*January 21, 2014*

**English Grade 11**

"The Unknown Citizen" by W. H. Auden Write a statement of Auden's view of society with three quotations to support it. Then write another statement on his view of society with three examples to support that. Any help would be great, please and thank you!
*January 21, 2014*

**Earth Science**

Analogy: melting is to freezing as partial melting is to _______? a. partial freezing b. magma. c. boiling. d. fractional crystallization.
*January 16, 2014*

**math**

3 bags
*January 15, 2014*

**science**

all of the following are explanations for glacial periods EXCEPT. a. varying solar energy b. volcanism c. biological organisms d. Earth's orbit's precession
*January 14, 2014*

**World History**

What is the connection between Czar Nicholas II, mobilization, and WWI? Any help would be great, thank you in advance!
*January 14, 2014*

**World History**

Why was Serbia’s fight for independence a key to WWI? Any help is appreciated, as I'm studying for a test and making flash cards. Please and thank you!
*January 13, 2014*

**US History**

Evaluate the evidence presented by Rice and Rockefeller. What light do they shed on the Robber Baron Industrial Statesman debate? I can't find the answer in my book, so any help is appreciated. Please and thank you!
*January 12, 2014*

**math**

Rewrite the equation 4x + y + 2 = 0 in slope-intercept form.
*January 11, 2014*

**US History**

Describe the deal the South Improvement Company made with the railroads and the advantages offered Standard Oil as well as the railroads. Can't find the answer anywhere in the packet that I was given. Any help would be appreciated, please and thank you!
*January 8, 2014*

**Physics**

Someone please answer i need help and do not understand
*January 5, 2014*

**Physics**

A 6 kg block free to move on a horizontal, frictionless surface is attached to a spring. The spring is compressed 0.16 m from equi- librium and released. The speed of the block is 1.44 m/s when it passes the equilibrium po- sition of the spring. The same experiment is now ...
*January 5, 2014*

**Physics**

Someone please answer i need help and do not understand
*January 5, 2014*

**Physics**

How far x does it move down the incline before coming to rest? Suppose the incline is frictionless. The angle of inclination is 36 ◦ , the spring constant is 89.6 N/m the mass of the block is 9.05 kg and the acceleration of gravity is 9.8 m/s2 . Answer in units of m ...
*January 5, 2014*

**algebra 2 honors**

2x^2-12x+32=x^2 x^2-12x+32=0 (x-4)(x-8) Use foil to check x*x=X^2 -4*x=-4x x*-8=-8x -4*-8=32 Combine like terms x^2-12x+32 Hope this helps
*January 5, 2014*

**Social studies**

1. What do we call a generally flat region surrounded by higher land?____________
*January 4, 2014*

**World History**

26. The Italian fascists had a slogan: "Women into the Home." How did this support their political ideas? Any help would be greatly appreciated, I can't find the answer in my book. Please and thank you!
*December 30, 2013*

**math**

Factor 16x(a + b + c) + 7y(a + b + c) + 8w(a + b + c). Please show the steps for how you get the answer. Thanks
*December 16, 2013*

**algebra **

HELP PLEASE!! ASAP!! If f(x)=2x+1 and g(x)=3x-5, find f(g(2))
*December 14, 2013*

**Algebra**

please help or examples!!!How many intergers are common to the solution sets of both inequalities? x+7>or = to 3x 3x+4<or = to 5x
*December 10, 2013*

**algebra**

If f(x)=2x+1 and g(x)=3x-5, find f(g(2)).
*December 10, 2013*

**math**

If f(x)=2x+1 and g(x)=3x-5, find f(g(2)).
*December 10, 2013*

**math**

If f(x)=2x+1 and g(x)=3x-5, find f(g(2)).
*December 9, 2013*

**math**

If f(x)=2x+1 and g(x)=3x-5, find f(g(2)).
*December 9, 2013*

**chemistry**

What volume of chlorine gas at 42.0 oC and 1.30 atm is required to react completely with 34.2 g of phosphorus (P4) according to the following reaction?
*December 7, 2013*

**Math - Calculus I**

Optimization Problem: Find the dimensions of the right circular cylinder of greatest volume inscribed in a right circular cone of radius 10" and height 24"
*December 5, 2013*

**math**

Matthew parks his car between Karen’s and Patrick’s apartment buildings. The car is 46 m in front of Karen’s apartment building. The angle of elevation from the car to the top of the building is 40°. Matthew’s car is 39 m away from Patrick’s ...
*December 2, 2013*

**Chemistry**

Calculate the heat in kilojoules needed to condense 185g of steam at 100 ∘C.
*November 24, 2013*

**Chemistry**

Calculate the heat in kilojoules needed to condense 185g of steam at 100 ∘C.
*November 24, 2013*

**6th grade math**

Right, it should be horizontal.... got my lines mixed up.
*November 21, 2013*

**6th grade math**

Forgot to add this question: 1. Describe the graph represented by the table: x 1 2 3 4 y 5 5 5 5 Ans: The actual graph would be a vertical line at ordered pairs (1,5), (2,5), (3,5), (4,5), and (5,). Is this right?
*November 21, 2013*

**6th grade math**

Can you check please: 1. Joe has used 75 sheets of a pack of notebook paper, which is 5/8 of the entire pack. The equation 5/8 s = 75 can be used to find the number of sheets "s" in a full pack. Determine the solution of the equation, and tell what the solution means...
*November 21, 2013*

**6th grade math**

Can you check these, please? 1. A spool contains 18.5 feet of rope. Bob cuts off a piece of rope. There are 13.8 feet of rope left on the spool. Write 3 equations that could used to determine the length of the rope (r) Bob cut off. Ans 1: r + 13.8 = 18.5 Ans 2: 18.5 - r = 13.8...
*November 21, 2013*

**6th grade math**

thanks!
*November 19, 2013*

**6th grade math**

Can you check this problem, please? n/((3/4))=5/9 Ans: multiply both sides by (3/4) n = 5/9 * 3/4 n = 15/36 n = 5/12
*November 19, 2013*

**World History**

During the very late 1800's/very early 1900's.
*November 18, 2013*

**World History**

In chronological order, list the territories and countries Japan took control of in its program of expansion. Please and thank you on any help!
*November 18, 2013*

**math**

x^-1y^0 do you do 1/x*1=1/x and how do you do x^-2y^1\ x^1y^2 ?
*November 18, 2013*

**statistics**

How large a sample would be needed to form a 90% confidence interval for the mean nicotine content of a brand of cigarettes if the nicotine content has a normal distribution with sigma equal to 8.5 mg and the width of the interval (the length of the confidence interval) equal ...
*November 17, 2013*

**math**

x^-1y^0 do you do 1/x*1=1/x
*November 16, 2013*

**Solar Energy**

4)Overall lifetime of the PV system
*November 14, 2013*

**math**

Janise is a sole proprietor owning a small specialty store. the business records show that the cost of the stores individual inventory items have been steadily increasing. the cost of the end of the year inventory is 125,000 and the cost of the beginning of the year inventory ...
*November 13, 2013*

**statistics**

The average gasoline price of one of the major oil companies has been $3.20 per gallon. Because of cost reduction measures, it is believed that there has been a significant reduction in the average price. In order to test this belief, we randomly selected a sample of 36 of the...
*November 12, 2013*

**dynamics**

The answer is not clear! Can you explain ?
*November 10, 2013*

**6th grade math**

Can you check this,please? 10−��^0+5(9−��) Ans: 10-x^0+ 45-5x = 10 - 1 + 45 - 5x = 9 + 45 - 5x = 54 - 5x OR 10−��^0+5(9−��) = 10 - x +45-5x = 55-6x?
*November 7, 2013*

**chemistry**

1) What is the chemical formula for the compound formed between thallium(iii) and bromine? 2) What is the chemical formula for the compound formed between thallium(iii) and sulfur? HINT!: each compound wil be neutral. What is the charge of the thallium(iii) ion? What is the ...
*November 7, 2013*

**physics**

A jogger is running around a circular track of circumference 340 m. If the jogger has a speed of 11 km/h, what is the magnitude of the centripetal acceleration of the jogger?
*November 4, 2013*

**6th grade math**

Can you check #18 and explain how to do #15 please? 15. Sue ordered 4 pizzas for 6 dollars each and 2 twelve packs of coke for x amount. Use the distributive property to create an equivalent expression. Ans: not sure-seems like they're not related. 6*4=2(12x) 24 =2(12 + x...
*November 4, 2013*

**6th grade math**

Thanks! 18. One person in my class will call 3 people, and each of those people will contact 3 other people, and so on. How many people will be contacted in the 5th round? Write your answer in exponent form and find the value. Ans: 3^5 = 243 Still don't understand #15 ...
*November 1, 2013*

**6th grade math**

Can you check my homework, please? 1. Write numeric expression for "eighteen less than the product of 2 and a". Ans: 2a - 8 2. Molly has x pieces of candy. Holly has twice as much. Write an expression to represent how much candy Holly has. Ans: 2x 3. Jill wrote 6 ...
*November 1, 2013*

**Math**

Why 15 and not another number
*October 29, 2013*

**6th grade math**

Can you check these, please? 1. George had 5 apples. His mother gave him a few more apples to share with his friends. Write an expression to represent the total number of apples George has. Ans: 5 + n 2. four times as much as a number k Ans: 4k 3. Michelle writes 15 pages in ...
*October 29, 2013*

**english comp**

After watching Roy Hargrove play the trumpet, Marcia decided that she wanted to be one.
*October 25, 2013*

**6th grade math**

Oh, okay. Thanks!
*October 24, 2013*

**6th grade math**

Can you check these problems, please? Translate each phrase into algebraic expression. 1. 5 more than D Ans: 5 + D 2. Twice a number W Ans: 2*W 3. Product of 60 and W Ans: 60*W 4. A number, N, decreased by 18 Ans: N - 18 5. 14 minus a number, M Ans: 14 - M 6. Twice a number, C...
*October 24, 2013*

**Geometry **

Find JL if JK=17-x, KL=2x-7, and K is the midpoint of JL
*October 24, 2013*

**6th grade math**

Thanks!
*October 23, 2013*

**6th grade math**

Can you check these, please? Convert each of the following verbal phrases to algebraic expressions. 1.twice the number plus 16 is 18 Ans: 2x + 16 = 18 2.the quotient of a number and ten more than fourteen is eleven Ans: (10 + 14)/x = 11? or x/10 + 14 = 11?
*October 23, 2013*

**physics **

A truck with a mass of 1.5 x 103 kg accelerates to a speed of 18.0 m/s in 12.0 s from a dead stop. Assume that the force of resistance is a constant 400.0 N during the acceleration. What is the average power developed by the truck’s engine?
*October 23, 2013*

**6th grade math**

Thanks!
*October 22, 2013*

**6th grade math**

Can you check these, please(studying order of operations). 1. Sam bought two CDs for $13 each. Sales tax for both CDs was $3. Write an expression to show how much Sam paid in all. Ans: 13*2+3 2. Alicia made 24 chocolate chip cookies and 36 sugar cookies. Then she divided all ...
*October 22, 2013*

**Compund inequalities**

all real numbers that are less than -3 or greater than or equal to 5 x<-3 or x=>5 x<5 or x=>-3* my answer x<=-3 or x>5 x<=-3 or x<=5
*October 18, 2013*

**quantum physics**

yes say 3a.i wont pass else
*October 18, 2013*

**quantum physics**

help reqd
*October 18, 2013*

**quantum physics**

@anonymous,@stuart @fred,,q3 a of quantum physics of edx,help please
*October 18, 2013*

**quantum physics**

question 3 a ...help pls
*October 18, 2013*

**Solving inequanities**

Write the solution to the inequanity in set builder notation 9t-4>32 t t>4 t t>6* my answer t t>28 t t>36
*October 17, 2013*

**6th grade math**

From Monday..Can you check the following problems, please? 1. If the ratios for microphones to karaoke machines are all equivalent, how can you find the value of x? table: microphones 3 9 15 36 karoke 1 3 x 12 Ans: x=5 (because divide each ratio by 3) 2 There are 32 students ...
*October 16, 2013*

**Math**

never mind I figured it out thanks tho
*October 15, 2013*

**Math**

can you long hand that?
*October 15, 2013*

**Math**

At a 35% off sale. Daniela purchased a dress for $94.64. What was the regular price of the dress. Please give the answer and formula.
*October 15, 2013*

**6th grade math**

I'm reposting again..Can anyone check my answers?
*October 14, 2013*

**6th grade math**

Can you check the following problems, please? 1. If the ratios for microphones to karaoke machines are all equivalent, how can you find the value of x? table: microphones 3 9 15 36 karoke 1 3 x 12 Ans: x=5 (because divide each ratio by 3) 2 There are 32 students in Mr. Santana...
*October 14, 2013*

**Far Rockaway beach**

Why are the far rockaway beach rapids so strong there? *Far Rockaway beach NY*
*October 14, 2013*

**Probability **

A survey of TV viewing habits of 50 men and 50 women found the following information: Of the 50 men, 20 prefer watching baseball and 30 prefer football. Of the 50 women, 25 prefer watching baseball and 25 prefer football. Construct a data table for this data and answer this ...
*October 12, 2013*

**Survey Math **

A survey of 240 10th grade students in a local High School found that there were 140 girls and 100 boys in the grade. Of the 140 girls, 100 preferred gym class while 40 preferred art class. Of the 100 boys, 40 preferred gym class while 60 preferred art class. Construct a data ...
*October 12, 2013*

**Math Probabilities **

A survey of TV viewing habits of 50 men and 50 women found the following information: Of the 50 men, 20 prefer watching baseball and 30 prefer football. Of the 50 women, 25 prefer watching baseball and 25 prefer football. Construct a data table for this data and answer this ...
*October 12, 2013*

**Math**

The probability of pulling a heart or a red card from a deck of cards is?
*October 12, 2013*

**Card Probability**

The probability of pulling an ace or king from a deck of cards is?
*October 12, 2013*

**AP Chemistry**

This may be a little late but what about moles
*October 11, 2013*