Thursday

July 31, 2014

July 31, 2014

Total # Posts: 931

**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 c...

**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.

**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?

**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

**chemistry**

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

**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,...

**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)...

**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...

**Math**

If I have 5 yellow marbles and 7 blue marbles, what fraction are yellow?

**Chem**

422g of ethyne and 190g of acetic acid find balanced equations and enthalpy calculations showing all steps

**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...

**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 s...

**math**

26+23+16+24=89 violet=24 so 24/89 Correct :)

**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

**Science**

Ty :)

**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.

**Science**

OOOhhh ok lol Ty yet again. :)

**Science**

In what direction does an applied force move an object? It moves opposite right?

**History**

Oh tytyty :) I posted a science question and what I got can you correct for me?

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

I have 3mins to have this done, I just wanna know if im right....

**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 ...

**Mrs.Sue?**

Are you still there?

**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...

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

help*

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

Ok lol ty can you hel with one more correction?

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

oh? I meant B. lol just mistypd in original question

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

I meant B..... LOL oops

**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 po...

**math**

i dont get how my teacher teaches she goes to fast for my to understand it what do i do

**andrew jackson**

how was andrew jackson a good president?

**history**

what was good and not good about andrew jackson's political ideas?

**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+

**Can someone Explain this(math)**

Ty! :)

**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?

**Math**

OHHhhh ok TY very much! I think I get it now.

**Any1??**

Please explain how you get the answer to. :) ty

**Math**

Given f(x) = –5x + 1, what is f(–2)?

**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 ...

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

really Really need help :)

**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....

**physics**

True :)

**chemistry**

The pH value would be C.1.3

**math**

a heater is plugged into 120v wall outlet. if the resistance in the heater is 15ohms what is the power used

**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?

**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...

**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?

**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....

**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....

**Statistics**

86.2? :D

**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?

**Algebra **

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

**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

**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 ...

**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?

**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?

**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?

**Math**

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

**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

**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

**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

**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

**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

**Chemistry**

The answer comes out to 418% but that doesn't seem to make sense. Is that the answer??

**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

**Chemistry**

What is the balanced equation? I cant figure out the answer

**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?

**Chemistry**

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

**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...

**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...

**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...

**math**

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

**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. ...

**English**

i wont do it again.

**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 ...

**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.

**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

**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

**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

**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

**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)

**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?

**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

**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

**math**

which inverse variation equation that relates to x and y x y 3

**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)

**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

**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.

**Economics**

sorry, i understood that, but as the prices go up the output goes down. but how can you recalculate the price. output drops to 15 in an earlier question, but i cant get my head around working out the price

**Economics**

got this from my teacher, A monopolist faces a demand curve given by the following equation: P = $500 − 10Q, where Q equals quantity sold per day. Its marginal cost curve is MC = $100 per day. Assume that the firm faces no fixed cost. and have the answers for most, but c...

**Algebra**

Drum major tosses the baton into the air from height of 6feet and initial velocity of 45 ft/sec. What is max height? We are to use ht=h+vt-1/2at^2

**Economics**

Normally, higher interest rates in a country cause the ___ for that country's currency to increase as money flows to the higher interest rates. This depends on the perceived ___. For the first blank I have "demand", but I'm not sure about the second blank?

**Calculus**

Use implicit differentiation to write the slope-intercept equation of the tangent line to the graph of (x^2+4)y=8 at the point (2,1):

**Calculus**

Use implicit differentiation to write the slope-intercept equation of the tangent line to the graph of (x^2+4)y=8 at the point (2,1):

**Chemistry**

How are a mix of pre-1982 and post-1982 pennies a misleading or incorrect analogy for actual element isotopes?

**Math**

What is an easy drawing that has a lot of circles in it.

**math**

if a cylinder with a height equal to its diameter has a volume of 20 cubic inches. How can you fine the volume of a sphere whose radius is equal to that of a cylinder

**Physics help!**

Two equal point charges of 5 µC are on the horizontal axis. One charge is at -10 cm, the other is at +10 cm.? These two charges don't move, they are STUCK, take the potential to be zero at infinity. Find the potential at the following coordinates: (0,0) cm, (0,10)cm ...

**Hard physics**

What do u mean by + same

**College physics**

What is C =10 pF ?

**College physics**

Open Question: Find the electric field between the plates of a capacitor given the following:? (1) C= 10pF (2) the capacitor is connected to a 25 V battery (3) there is a vacuum between the capacitor plates (4) plate separation is 2 mm

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