Thursday

January 19, 2017
Total # Posts: 51

**Chemistry**

Balance the following equation for a half reaction that occurs in acidic solution. Use e– as the symbol for an electron. U^4+ --> UO2^+ There is a hint: In acidic solution, you may add H2O and H as needed to balance oxygen and hydrogen. When finished, don\'t forget...

*April 28, 2014*

**Chemistry**

I think it might be because you used 8.413 for R, I think R is supposed to be 8.314. So I think K is right if it is 5.04. But I seem to be stick on the substitution part because I tried to solve it but I get 5.04 = x/(0.3-x)(0.4-x). Am I supposed to multiply it out and isolate...

*April 28, 2014*

**Statistics**

You have two independent samples of size 24 and 27. You conduct a hypothesis test and obtain a p-value. Using the conservative method what would you use for the degrees of freedom for comparison? 24 27 23 26 49

*November 1, 2012*

**Statistics**

What critical t value would be needed to construct a 90% confidence interval on a sample of size 22? 1.717 1.323 2.080 1.321 1.721

*November 1, 2012*

**Statistics**

You have two independent samples of size 24 and 27. You conduct a hypothesis test and obtain a p-value. Using the conservative method what would you use for the degrees of freedom for comparison? 24 27 23 26 49

*October 26, 2012*

**Statistics**

What critical t value would be needed to construct a 90% confidence interval on a sample of size 22? 1.717 1.323 2.080 1.321 1.721

*October 26, 2012*

**writing essay**

Jack was told the overall content of his paper was weak. What does this mean? A. The tone of his paper was not original B. He had to many grammatical errors C. The overall ideas in his essay were not fully developed D. The flow of his essay was inconsistent

*June 21, 2012*

**writing essay**

Catherine received a 70 on her essay because the vocabulary was basic and there was a lack if clear and active voice. Which of the following areas of her essay were weak? A. Organization B. Mechanics C. Content D. Style

*June 21, 2012*

**Essay**

The body of your essay contains which of the following? A. The longest section of the essay B. The supporting details. C. A Conciluding sentence D. All of the above

*June 21, 2012*

**Reading**

Which of the following is the most effective opening sentence for an introductory paragraph? A. I heard a loud sound before I collapsed B. Bang! That was the last soound I heard before I collapsed. C. The loud sound was the last thing I heard before I collapsed. D. None of the...

*June 21, 2012*

**reading**

A. Give the reader an idea of the subject matter. B. Include the title of the essay. C. Grab the reader's attention. D. Provide a thesis sentence.

*June 21, 2012*

**reading**

the first sentence of your introductory paragraph should do all of the following EXCEPT:

*June 21, 2012*

**physics**

A proton that has a mass m and is moving at 250 m/s in the + direction undergoes a head-on elastic collision with a stationary oxygen nucleus of mass 16m. Find the velocities of the proton and the oxygen nucleus after the collision i know i have to consider that both momentum ...

*May 6, 2012*

**physics**

Think about the analogy "full of hot air." If a person were to inhale 2.2 L of gas at a temperature of 18 °C and that air heats to a temperature of 38 °C inside the lungs, what would be the new volume of the gas? Round to the nearest hundredth. Don't ...

*December 2, 2011*

**physics**

Think about the analogy "full of hot air." If a person were to inhale 2.2 L of gas at a temperature of 18 °C and that air heats to a temperature of 38 °C inside the lungs, what would be the new volume of the gas? Round to the nearest hundredth. Don't ...

*December 2, 2011*

**Science**

A 0.50 kg ball traveling at 6.0 m/s collides head-on with a 1.00 kg ball moving in the opposite direction at a velcity of -12.0 m/s. The 0.50 kg ball moves away at -14 m/s after the collision. Find the velocity of the second ball.

*October 1, 2011*

**physics**

If acoin roll at 1.5m/s and later rolls at 4.5m/s with an acceleration of 2 meters per squared second how long will it take to come to a stop, how far will it travel?

*May 2, 2011*

**physics... last one**

Two blocks, A and B (with mass 50 kg and 100 kg, respectively), are connected by a string, as shown in Figure P5.63. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between block A and the incline is µk = 0.23. Determine the change ...

*November 10, 2010*

**physics...again :/**

A skier starts from rest at the top of a hill that is inclined at 9.9° with the horizontal. The hillside is 160 m long, and the coefficient of friction between snow and skis is 0.0750. At the bottom of the hill, the snow is level and the coefficient of friction is ...

*November 10, 2010*

**ap physics**

Starting from rest, a 10.2 kg block slides 2.90 m down a frictionless ramp (inclined at 30.0° from the floor) to the bottom. The block then slides an additional 4.80 m along the floor before coming to a stop. Determine the coefficient of kinetic friction between block and ...

*November 10, 2010*

**PHYSICS**

If the speed of the child at the lowest position is 2.50 m/s, what is the mechanical energy lost due to friction?

*November 10, 2010*

**PHYSICS**

thanks!

*November 10, 2010*

**PHYSICS**

A 27.0 kg child on a 3.00 m long swing is released from rest when the swing supports make an angle of 31.0° with the vertical. Neglecting friction, find the child's speed at the lowest position.

*November 10, 2010*

**Math**

Simplify: x4 −4x3 −27x+108 ---------------- x3 −3x2 −16x+48 PLEASE!

*November 3, 2010*

**writing**

So I read books 12-16 of The Annals by Tactius and haven't yet finished the Civil War by Lucan. But after reading these two we are suppose to come up with a thesis statement to write a paper about literature in the time of Nero. This is only a rough draft since we still ...

*September 6, 2010*

**calculus**

is that the answer for a ?

*March 30, 2010*

**calculus**

a closed box has a fixed surface area A and a suqare base wide side X a) find the formula for its volume, v, as a function x b) sketch the graph of v against x c) find the max value of V

*March 30, 2010*

**math**

Hi i have a math exam tomorrow and i wanted to get some extra practice so can you please find me free online math tests. Please do not give me "Proprofs" as one of the websites. I have already tried their website and it did not help :D

*January 27, 2010*

**english gr 9**

Can you please tell me a theme statement for curious case of the missing dog in the night-time by Mark Haddon. I have an exam on monday...

*January 22, 2010*

**eng**

Sorry there is no "b" in the word so it is lukngidc

*January 4, 2010*

**eng**

please unscramble lukgibdnc

*January 4, 2010*

**shakespeare**

what is shakespeare saying about love in this quote"I wish my father looked but with my eyes"-- i get that it means that everyone has their own perspective on how they see one another but is there any other idea?

*December 15, 2009*

**Business**

What are the different devices used to communicate in businesses?? already have: instant messaging, cell phones, e-mail,online conferencing, video call, voice mail.

*December 3, 2009*

**geo**

did industrilasation have a hand in child poverty? when did child poverty start? I ahve already googled --- did not help

*November 9, 2009*

**Geography**

I did but its not giving me the kind of answers i need... I'm doing a project and this research is super important!! so please help me out!!!

*November 5, 2009*

**Geography**

Where is Child Poverty? i already know developing countries, and names a cuple of examples is there any other information??? next question is when did child poverty occur???

*November 5, 2009*

**gr 9 math**

Can someone please post up some questions for dividing polynomial by factoring? I need to practice fo an upcoming test...

*October 31, 2009*

**geo**

what are some political reasons people move?

*October 4, 2009*

**geo**

what are some enviromental reasons people move?

*October 4, 2009*

**physics**

The scale of a spring balance reading from 0 to 250N has a length of 10.0 cm. A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.85 Hz. Ignoring the mass of the spring, what is the mass m of the fish? (and why the heck do we have a fish on a...

*May 22, 2009*

**Algebra**

Thank You So Much!

*March 16, 2009*

**Algebra**

Factor Completely: 1000p^3 - 1 (One thousand P cubed minus one)

*March 16, 2009*

**English Language**

what would you do to resolve such a problem?

*February 11, 2009*

**English Language**

What does it mean to resent the class system among students? (I think it means to hate the class system among students but even with that definition I still don't understand what it means)

*February 11, 2009*

**college**

if 2(x-5)=-11 then x = ? how do you get the answer? i came up with -8 but its wrong

*September 9, 2008*

**bobpursley**

thank you for all your help

*September 9, 2008*

**Algebra**

i need to use the quadratic formula 2 solve these 4 questions: 1. x(squared)-6x+4=0 2. t(squared)+4t-2=0 3. 3x(squared)+10X+5=0 4. 2x=7-x(squared) I just can't seem 2 get the right answer!

*April 23, 2008*

**alg.**

solve and graph 2x-y=4 2x-y=6 would this be x=2+0.5y x=3+0.5y and then graph as that??????? not really sure what i am doing here Put both equations in the form of y=mx +b Then observe that the slope is the same, the lines are parallel, and have no common solution.

*May 20, 2007*

**algebra**

okay i have to find f(a-2) out of this question f(x)=5x-1 were did the a come from. man i am so confused? "a" is a variable. Like "x" is in most equations. So 5(a-2) - 1 Multiply it out from there and simplify. Matt

*May 18, 2007*

**algebra**

you give me the answer but didn't really tell me how you did it so i can figure how to find the other numbers giving. also was just respneding that the problem was true as you said it made nosense. evaluate each function for the value specified. evaluate each function for ...

*May 18, 2007*

**algebra**

evaluate each function for the value specified.fx+x2-7x+10; find (a)f(0),(b)f(5),and(c)f(-2). can any one help me withthis i have not the first clue how to begin here. What you wrote is nonsense. Did you mean f(x)=x2-7x+10 ? If so, f(0)= put zero in for x, so it equals 10. f(5...

*May 18, 2007*

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