Tuesday

October 21, 2014

October 21, 2014

Total # Posts: 941

**physics**

A dolphin leaps out of the water at an angle of 24.9 ° above the horizontal. The horizontal component of the dolphin's velocity is 5.05 m/s. Find the magnitude of the vertical component of the velocity.
*October 8, 2014*

**physics**

On a spacecraft, two engines are turned on for 525 s at a moment when the velocity of the craft has x and y components of v0x = 4780 m/s and v0y = 8850 m/s. While the engines are firing, the craft undergoes a displacement that has components of x = 3.54 x 106 m and y = 7.77 x ...
*October 2, 2014*

**Physics 1**

A block is given an initial velocity of 9.00 m/s up a frictionless incline of angle θ = 21.0°. How far up the incline does the block slide before coming to rest?
*September 25, 2014*

**Math Help!!**

Two phone companies offer discount rates to students. The first company wants $9.95 per month plus $.10 per minute for long distance calls. The second company wants $12.95 per month plus $.08 per minute for long distance calls. Write a linear equation describing the total cost...
*September 21, 2014*

**Math**

Two phone companies offer discount rates to students. The first company wants $9.95 per month plus $.10 per minute for long distance calls. The second company wants $12.95 per month plus $.08 per minute for long distance calls. Write a linear equation describing the total cost...
*September 20, 2014*

**Math**

what does that mean?? write the place and value of each number. 1)5,272,468,693 what is the selected digit in? ^ its eight
*September 18, 2014*

**math**

add all of the dvds up so 12+15+9=36 the ratio is action : total action is 12 total is 36 12:36 is your answer
*September 15, 2014*

**Chemistry**

Complete each calculation. Express your answer to the correct number of significant digits. a)4.02mL + 3.76mL +0.95mL b)(2.7 x 10^2m) x (4.23 x 10^2m) c)5092kg divided by 23L d) 2-6.3 + 6-7 e)(6.853 x 10^3L) + (5.40 x 10^3mL) f)(572.3g + 794.1g) divided (24mL + 52mL) My ...
*September 11, 2014*

**Algebra**

Is 32 =8x - 8 an example of an open equation? My answer is yes
*August 27, 2014*

**Algebra**

You are right the first position in the ordered pair is always the value. Thank you
*August 27, 2014*

**Algebra**

Is (1, -4) a solution for the equation y = -2x? My answer is 1 = 2 (-4) 1 = -8 No it isn't
*August 27, 2014*

**Algebra**

How can you use an equation to make a prediction from a pattern. I think that you can do based on the pattern giving you a base of probability to forecast with a reasonable degree of confidence something in the future.I would think that your degree of confidence might depend ...
*August 27, 2014*

**chemistry**

If 3.65 g of a compound having a molecular weight of 481.93 g mol-1 is dissolved in water to make a final volume of 142 mL, what is the concentration of the solution in mM? Answer to three significant figures.
*August 1, 2014*

**physics**

At noon on a clear day, sunlight reaches the earth\'s surface at Madison, Wisconsin, with an average power of approximately 1.00 kJ·s–1·m–2. If the sunlight consists of photons with an average wavelength of 510.0 nm, how many photons strike a 2.60 ...
*June 17, 2014*

**Math**

Traveling in France, Miguel exchanged 12 U.S. dollars for 82.8 francs. A few days later, he exchanged 25 U.S. dollars for francs and got the same exchange rate. How many francs did Miguel receive? Round to the nearest tenth.
*June 12, 2014*

**chemistry**

a scuba driver is using eanx32, an enhanced nitrox gas mixture. this mixture contains 32% oxygen with 68% nitrogen. if the cylinder is at a pressure of 250 kpa, what is the partial pressure of oxygen?
*June 5, 2014*

**biology**

if a population comprised 52 AA, 114 Aa and 34 aa individuals and the 'A' allele was dominant, what would be the genotype, allele, and phenotype frequencies be
*June 3, 2014*

**chemistry**

What is the pH of a 0.001 M solution of acetylsalicylic acid (aspirin) (Ka 3.0 x 10-4)?
*May 19, 2014*

**statistics**

A survey of 100 commuters finds the average commuting to work is 25.5 minutes with the standard deviation of 11.5 minutes. construct a 98% confidence interval for the mean commuting time of commuters answer: 100%-98%=2%=0.02=0.01=1.28 E=1.28.11.5 divide by 10= 1.47 (25.5-1.47...
*May 18, 2014*

**chemistry**

Consider the following system, which is at equilibrium, 3C(s) + 3 H2(g) mc020-1.jpg CH4(g) + C2H2(g) The result of removing some C(s) from the system is that a) more CH4(g) and C2H2(g) are produced to replace that which is removed. b) Kc decreases. c) more C(s) is produced. d...
*May 11, 2014*

**chemistry, first year university**

Solid NH4N3 decomposes explosively according to the following equation: NH4N3(s) ⇌ 2N2(g) + 2H2(g) A small amount of ammonium azide was placed in a sealed container and the air was removed. The sample was then detonated. At equilibrium the total pressure in the container...
*May 11, 2014*

**Math**

If I have 5 yellow marbles and 7 blue marbles, what fraction are yellow?
*April 29, 2014*

**Chem**

422g of ethyne and 190g of acetic acid find balanced equations and enthalpy calculations showing all steps
*April 11, 2014*

**Programming Logic & Design**

Modify the previous process to store the scores in an array. You will need to use either parallel arrays or a two-dimensional array in order to store the score, slope and rating for each entry. In the loop you created in the previous assignment to read the 10 scores, add logic...
*April 10, 2014*

**Physics**

I need immediate help on these questions:. 2.a small plastic ball with a mass of 0.005kg is suspended from a thread and hangs in equilibrium as shown in the drawing below when a small rod with a 2 uC charge is brought to within 3mm of the ball a)find the tension force in the ...
*March 30, 2014*

**math**

26+23+16+24=89 violet=24 so 24/89 Correct :)
*March 13, 2014*

**MATH**

10+6+11=27 brown+white=17 so 17/27 correct 16,18,20,22,24,26,28 so 7/? 16,17,18,19,20,21,22,23,24,25,26,27,28 so ?/13 ---- 7/13 Correct
*March 13, 2014*

**Science**

Ty :)
*March 13, 2014*

**Science**

Which of the following is not an example of work? A. raising a barbell over your head B. picking up a box off the floor C. holding a tray in the cafeteria line D. pushing a box across the floor I think its C.
*March 13, 2014*

**Science**

OOOhhh ok lol Ty yet again. :)
*March 13, 2014*

**Science**

In what direction does an applied force move an object? It moves opposite right?
*March 13, 2014*

**History**

Oh tytyty :) I posted a science question and what I got can you correct for me?
*March 13, 2014*

**Mrs.Sue... Anyone???**

I have 3mins to have this done, I just wanna know if im right....
*March 13, 2014*

**History**

Mark the statement if it describes Roman society during Julius Caesar’s time. A. Wealthy individuals owned and controlled most of the land. B. Few people were living in the cities. C. The government of Rome was corrupt. D. Civil war broke out. E. Romans were losing faith ...
*March 13, 2014*

**Mrs.Sue?**

Are you still there?
*March 13, 2014*

**History--Correct 1 question please? :)**

Mark the statement if it describes Roman society during Julius Caesar’s time. A. Wealthy individuals owned and controlled most of the land. B. Few people were living in the cities. C. The government of Rome was corrupt. D. Civil war broke out. E. Romans were losing faith...
*March 13, 2014*

**History--Correct 1 question please? :)**

help*
*March 13, 2014*

**History--Correct 1 question please? :)**

Ok lol ty can you hel with one more correction?
*March 13, 2014*

**History--Correct 1 question please? :)**

oh? I meant B. lol just mistypd in original question
*March 13, 2014*

**History--Correct 1 question please? :)**

I meant B..... LOL oops
*March 13, 2014*

**History--Correct 1 question please? :)**

Which statement below best describes Cincinnatus and Julius Caesar? A. Both men put the welfare of the Roman Republic above their own personal success and both obeyed the Senate in time of crisis. B. Cincinnatus accepted the role of dictator in a crisis and then gave up his ...
*March 13, 2014*

**math**

i dont get how my teacher teaches she goes to fast for my to understand it what do i do
*March 12, 2014*

**andrew jackson**

how was andrew jackson a good president?
*February 25, 2014*

**history**

what was good and not good about andrew jackson's political ideas?
*February 25, 2014*

**Chemistry--acids**

Which of the following substances can act as a Bronsted acid in aqueous solution? (Select all that apply.) NH41+ H2 O2 C4H10 H2CO3 H2SO4 H3O1+
*February 23, 2014*

**Can someone Explain this(math)**

Ty! :)
*February 21, 2014*

**Can someone Explain this(math)**

34, 36, 43, 46, 47, 48, 48, 52, 53, 54 Box And whisker Plot I Don't Understand these at all can someone Explain without totally giving me the answer?
*February 21, 2014*

**Math**

OHHhhh ok TY very much! I think I get it now.
*February 21, 2014*

**Any1??**

Please explain how you get the answer to. :) ty
*February 21, 2014*

**Math**

Given f(x) = –5x + 1, what is f(–2)?
*February 21, 2014*

**physics**

You would like to shoot an orange out of a tree with your bow and arrow. The orange is hanging 5.00 m above the ground. On your first try, you fire the arrow at 36.0 m/s at an angle of 30.0° above the horizontal from a height of 1.40 m while standing 41.0 m away. Treating ...
*February 17, 2014*

**Science ( Need help really bad Please!)**

really Really need help :)
*February 13, 2014*

**Science ( Need help really bad Please!)**

An object's weight is dependent upon its location in the universe. Why is this true? A. This is true because weight is the magnitude of gravitational force acting on an object, and since gravitational force varies in different places in the universe, weight also varies. B...
*February 13, 2014*

**physics**

True :)
*February 13, 2014*

**chemistry**

The pH value would be C.1.3
*February 13, 2014*

**math**

a heater is plugged into 120v wall outlet. if the resistance in the heater is 15ohms what is the power used
*February 13, 2014*

**Physical Science**

An Olympic sprinter can go from a state of rest to 11 meters per second in 10 seconds. What is the average acceleration of the sprinter?
*February 13, 2014*

**social science**

Think about the war between the United States and Iraq. To what degree, if any, did political culture play a role in the decision to go to war, the public’s support of the war, and how public officials discussed the war? Looking at this example, reflect back on historical...
*February 5, 2014*

**chemistry**

Ammonium chloride and sodium nitrite react to form sodium chloride, water and nitrogen gas. If 6.33 moles of ammonium chloride react with sodium nitrite, how many grams of sodium chloride will be produced?
*January 29, 2014*

**Physical Science HELP**

Can someone check if these are right: Tell reaction rate 1.) one antacid tablet is placed in a glass of cold water, while another table is placed in a glass of hot water. TEMPERATURE? 2.) a mixture of baking powder, flour, sugar, and eggs is placed in the oven. TEMPERATURE? 3...
*January 14, 2014*

**Physical Science**

Can someone check if these are right: Tell reaction rate 1.) one antacid tablet is placed in a glass of cold water, while another table is placed in a glass of hot water. TEMPERATURE? 2.) a mixture of baking powder, flour, sugar, and eggs is placed in the oven. TEMPERATURE? 3...
*January 14, 2014*

**Statistics**

86.2? :D
*December 13, 2013*

**Statistics**

Scores on a certain exam are normally distributed with a mean of 78 and a variance of 25. What is the score obtained by the top 5% of the students? I do not understand the 5% part. What does the tail look like on the bell-shaped graph?
*December 13, 2013*

**Algebra **

Simplify (factor if necessary) : 5 x^2 y^2 - 25 x^3 y^3 -------------------------------- x^2 y^2 Please help! Don't understand
*December 10, 2013*

**ENGLISH**

A hypothetical example is: A. A false example B. not real but can happen C. an example to prove a hypothesis d. has no place ina speech
*December 9, 2013*

**heiarchy chart needed out of this information pls**

VELMA'S VET Velma and her husband Victor run a full service veterinary clinic. They would like a program to help them calculate costs for their clients. Victor, who is the vet, charges a flat fee of $100 for medical services and a flat fee of $50 for shots. Velma does the ...
*October 25, 2013*

**physics**

You throw a ball upward from a window at a speed of 1.7 m/s. How fast will it be moving when it hits the sidewalk 2.5 m below?
*October 15, 2013*

**physics**

How far does a plane fly in 13 s while its velocity is changing from 142 m/s to 75 m/s at a uniform rate of acceleration?
*October 15, 2013*

**physics**

You throw a ball downward from a window at a speed of 2.7 m/s. How fast will it be moving when it hits the sidewalk 2.8 m below?
*October 15, 2013*

**Math**

in the problem 15 + 37=52, show how to make ONE addend the next tens number. Complete the new addition sentence __+__=__????
*October 9, 2013*

**7th grade Math**

Please, help me how to solve this problem 21% of 82 how do you use a fraction to estimate the percent of each number? Thank you
*October 8, 2013*

**Genetics 160**

Using D for tall plants and d for dwarf plants, a 1:1 ratio is obtained in which of the following crosses? These are my choices: Dd X dd DD X dd DD X Dd DD X DD Dd X Dd
*September 29, 2013*

**Chem simple question**

how many mL of .135M Sr(OH)2 are needed to neutralize 35ml of .157M HCL I know the answer came out to 20.4 ml My only question is how do I convert HCL to Sr(OH)2
*September 29, 2013*

**Chem Simple question**

Magnesium metal burns in oxygen to form magnesium oxide, MgO. (a) Write a balanced equation for the reaction Why is it 2Mg+O2->2MgO and not Mg+O->MgO
*September 29, 2013*

**chem**

How many moles of carbon are needed to react with 525 g of hematite 2FeO3+6C->4Fe+3Co2 idk how to convert moles of fe2o3 to carbon
*September 29, 2013*

**Chemistry**

The answer comes out to 418% but that doesn't seem to make sense. Is that the answer??
*September 29, 2013*

**Chemistry**

A .500g unknown sample is titrated with 40mL of .187M KMno4 by the following reaction: 5Fe{2+} + MnO4{-1} + 8H{+1} -> 5Fe{3+} + Mn{2+} + 4H2O. What is the percentage of iron in the following sample
*September 29, 2013*

**Chemistry**

What is the balanced equation? I cant figure out the answer
*September 29, 2013*

**Chemistry**

A 50mL solution of NaOH is neutralized by adding 37.5 mL of 0.045 M HCL. What was the original concentration of the NaOH solution?
*September 29, 2013*

**Chemistry**

Determine if precipitation occurs and write the proper ionic equation a) Na2O3+NiCL2 b) Pb(NO3)2+ALCL3
*September 29, 2013*

**physics**

Suppose a car is traveling at +22.3 m/s, and the driver sees a traffic light turn red. After 0.351 s has elapsed (the reaction time), the driver applies the brakes, and the car decelerates at 8.00 m/s2. What is the stopping distance of the car, as measured from the point where...
*September 11, 2013*

**physics**

Suppose a car is traveling at +22.3 m/s, and the driver sees a traffic light turn red. After 0.351 s has elapsed (the reaction time), the driver applies the brakes, and the car decelerates at 8.00 m/s2. What is the stopping distance of the car, as measured from the point where...
*September 11, 2013*

**physics**

Suppose a car is traveling at +22.3 m/s, and the driver sees a traffic light turn red. After 0.351 s has elapsed (the reaction time), the driver applies the brakes, and the car decelerates at 8.00 m/s2. What is the stopping distance of the car, as measured from the point where...
*September 11, 2013*

**math**

the product of 1000 whole number is 1000, what is the largest possible value the sum of these numbers can have
*August 26, 2013*

**Algebra**

A ball is dropped from the top of a building that is 784 feet high. The height of the ball above ground level is given by the polynomial function h(t)= -16t to the second power + vot + ho where t is measured in seconds, vo is the initial velocity and ho is the initial height. ...
*July 28, 2013*

**English**

i wont do it again.
*July 11, 2013*

**English**

Hey, just look up the grammar, tenses and wheter I use the right words, ok? It is for an oral excercise so the spelling isen't important. Thanks and now the text: Mandy: Good Morning and welcome to the morning show with me: Mandy Melrose! Today I wanna talk with you about ...
*July 11, 2013*

**College Algebra**

1 -1 -1 1 2 0 1 -3 -7 0 3 0 -2 2 10 6 2 4 5 9 -3Row1 + Row3 -6Row1 + Row4 How do I work this using a calculator I get so confused and I don't know where to go in order to input info.
*July 6, 2013*

**Econoics**

Cobb-Douglas Production function Y=60K^1/3 L^2/3 If K=64 L=8 calculate MPL What is the equilibrium real wage in the economy
*July 1, 2013*

**College Algebra**

Can someone tell me if I have this one correct. log_1/2x 2+log_1/2x the relationship is a shift of 1 unit horizontally
*June 27, 2013*

**College Algebra**

can someone tell me if I am correct graph y1=(1/3)^x and y2= (1/3)^x+2 the relationships between the two graphs is they are separated horizontally by 2 units
*June 26, 2013*

**College Algebra**

I am new to this graphing calculator. I input y=5^x and y=(5^x)-3 It is graphed with tables showing x=-3 y1=-374/125 and y2=1/125 x=-2 y1=-74/25 y2=1/25 my question is what is the relationship between the graphs. I am unclear on what the question is asking
*June 26, 2013*

**College Algebra**

how do I find a 4th degree polynomial that has zeros; i,3i with f(-1)=60 I know the conjucants are -i and -3i (x-i)(x-3i) (x+i)(x=3i)
*June 24, 2013*

**Physics**

In order to stop a Ferris wheel, a force is applied that accelerates at a rate of -0.010rad/s^2. How long will it take the Ferris wheel to stop?
*June 21, 2013*

**math**

find the 15th term in the geometric sequenc below 20,10,5,2.5,.... a. - 25 b. - 5 4096 4096 c. 5 d. 25 4096 4096
*May 16, 2013*

**math**

which inverse variation equation that relates to x and y x y a. y+3x 3 1 b. y= 1/3 (3) 5 3/5 c. y=3/x 6 1/2 d. y=1/3x 8 3/8
*May 16, 2013*

**math**

which inverse variation equation that relates to x and y x y 3
*May 16, 2013*

**math**

a function grows exponentially at a rate of 10%. If the value at t=2 is 908.56 what is the value of (a) in the formula: f(x)=a.b(x)
*May 16, 2013*

**Math**

equation best describes exponential decay a. y=a.b(x) with o<b<1 b. y=a.b(x) with o<b_<1 c. y-a.b(2) with o<x_<1 d. y=a.b(x) with a>o
*May 16, 2013*

**Economics**

ah ok, i see your point. i had worked out that P = $500 - 2xQ(10x20) as MC = MR (100=100), so price was 300 and output 20. the tax would mean a reduction in output to 15 units, by my calcs but how can i work out the corresponding price.
*May 7, 2013*

Pages: **1** | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | Next>>