Thursday
April 24, 2014

Posts by luke


Total # Posts: 283

Physics
A small block on a frictionless surface has a mass of 70 g. It is attached to a massless string passing through a hole in a horizontal surface (see diagram). The block is originally rotating in a circle of radius 45 cm with angular speed 0.80 rad/s. The string is then pulled f...

probability
consider a sequence of independent tosses of a biased coin at times k=0,1,2,…,n. On each toss, the probability of Heads is p, and the probability of Tails is 1−p. A reward of one unit is given at time k, for k∈{1,2,…,n}, if the toss at time k resulted in ...

Biology
We consume carbon in the form of carbohydrates (like the pop you drink or the donuts you eat). We also breath in oxygen. It comes out in the form of carbon dioxide and water.

math
what is the answer to the math pizzazz E-30? What is the title?

Statistics
The probability of Joe is at work is 49%. The probability Joe is at home is 25%. What is the probability Jow is neither at Work nor at home? A) 39% B)74% C)52% D)26% I get the answer at about 38%,but doesn't round to 39%, can anyone help, I'm stuck.

Algebra 2
A card is drawn at random from a full pack of playing cards. It is not put back. A second card is then drawn from the same pack. (a) Find the probability that: (i) both cards are sevens (ii) neither card is a seven (iii) at least one seven is obtained

LA
How does Voltaire give examples in his book Candide that governments need to have both shepherds and butchers

english
Need Help Please..!!! During the Victorian period, there were many social changes and intellectual developments. As a result, a crisis of faith rocked society. How does In Memoriam, A. H. H. by Alfred, Lord Tennyson reflect that crisis? a)Grieving, the speaker first conveys hi...

physics
Suzie (of mass 76 kg) is roller-blading down the sidewalk going 12 miles per hour. She notices a group of workers down the walkway who have unexpectedly blocked her path, and she makes a quick stop in 1.9 seconds. What is Suzie’s average acceleration

Math
Why did Karjam Get a flat tire.

Music
How do you play a dotted quarter note following that an eigth note tied with a quarter note???

English
"In this third circle, write four quotations from The Lightning Thief that relate to the center sketch. Document this quotation properly (The Lightning Thief, Riordan, pg. 84). Does the quotations I put have to be in complete sentence? For example my sketch was riptide fr...

English
Thanks Ms. Sue! :D :D

English
So, like this? "With a double-edged blade" page 153 of The Lightning Thief by Riordan?

English
Like, what are the words in parenthesis? Do I have to use it

English
Document this quotation properly (The Lightning Thief, Riordan, pg. 84).

English
Im doing a project about a book and here is one of my instructions. In this third circle write four quotations from The Lightning Thief that relate to the center sketch. Document this quotation properly (The Lightning Thief, Riordan, pg. 84). What does that mean?

physics
A 4.3 g mass is released from rest at C which has a height of 0.8 m above the base of a loop-the-loop and a radius of 0.31 m. The acceleration of gravity is 9.8 m/s2 . Find the normal force pressing on the track at A, where A is at the same level as the center

Science
How can I draw water powering electricity on my paper? I have to draw a house and ways to power it so I drew the sun, wind mills, solar panels, thick walls, electric poles? Do I draw water near the house?

Science
Ways to have energy in your house without having to use fossil fuels? Use the sun has your light for solar energy Have solar panels wind mills for wind energy thick walls to keep isolation electric poles Any other ways? Or any ways without using fossil fuels you can use for yo...

budgeting
John's gross income is $1,000 per month. Based on an assumption that 25% of his gross income will be withheld, he can expect his disposable (spendable) income to be _______ per month. A. $650 B. $750 C. $850 D. $950 help I am not sure on this I am lost every answer I arriv...

budgeting
A. She should scrap her present budget and start all over again. B. It is clear that Lisa is just one of those people for whom budgeting is impossible. She should give up on the idea. C. She should make adjustments in her food-buying habits and/or look for ways to trim other ...

more statistics
The percent of fat calories that a person in America consumes each day is normally distributed with a mean of 36 and a standard deviation of about 10. Suppose that 16 individuals are randomly chosen for an experiment. Completely describe the distribution of sample means for th...

statistics
PsyDAG, right on thanks

statistics
All deal with a random variable X that follows a normal probability distribution with mean equal to 37 and a standard deviation of 5. Compute P(X < 39) Compute P(X < 29 or X > 41) Compute P(X > 30) Find the 42nd percentile for this distribution.

statistics
All deal with a random variable X that follows a normal probability distribution with mean equal to 37 and a standard deviation of 5. Compute P(X < 39) Compute P(X < 29 or X > 41) Compute P(X > 30) Find the 42nd percentile for this distribution.

Math
Find the Least Common multiple of the two expressions: 24x^2-96 & 18x^2+18x-36

Physics
Two satellites, X and Y, orbit a planet in nearly circular orbits. Satellite X takes 20 days to complete one orbit, while satellite Y takes 160 days. If satellite X has orbital radius 1.0r, what is the orbital radius of satellite Y?

english essay
The second poem I will write about is ‘the conscript’ it was written by Wilfred Gibson in 1917. a law was passed to force men to join up between the ages of 18-41 unless they were ill this poems says what you’re really going to expect from the war if you join up...

Physics
In a common test for cardiac function (the "stress test"), the patient walks on an inclined treadmill (Figure 6-46). Estimate the power required from a 70 kg patient when the treadmill is sloping at an angle of 15° and the velocity is 3.10 km/h.

Physics
A 0.565 kg wood block is firmly attached to a very light horizontal spring (k = 185 N/m) as shown in Fig. 6-40. It is noted that the block-spring system, when compressed 5.0 cm and released, stretches out 2.3 cm beyond the equilibrium position before stopping and turning back....

chemistry
Consider Ba (NO₃)₂ + K₂SO₄ → BaSO₄ + 2KNO₃ (0.10 M) (0.10 M) (10.0 mL) (20.0 mL) Will the K₂SO₄ be sufficient to precipitate all the Ba⁺² ions in the Ba (NO₃)₂? Use Stoichiometry to answer this questi...

Math
Amanda says her quilt has 9 equal parts. Jeremy says it has 3 equal parts. Can they both be correct?

Help math
1 pound is equal to 16 ounces. 4*16=64 you only have 60 so you need 4 more.

Math 6
1 gallon = 4 quarts try it now.

Math
Alexa is choosing a number for her new combination lock. She can use three differents digits from 0 to 9. How many arrangements are there?

food
how much is 2/3rd of a cup of sugar when it is .36 a cup?

Math conversion
I still don't get it.

math
what is the unit rate for 22 gallons of gas to go 682 miles

maths
A mass of 350 kg is lifted by 2 cables connecting at the same point as shown. Determine the tensions in each cable when the system is in equilibrium.Left hand cable is t1 at 40 degree angle and Right hand cable is t2 at 30 degree angle

Math, algebra!! Please help!!!!!!
awsome thanks even though i didnt post this question

Math, algebra!! Please help!!!!!!
good answer

Physics
Consider the conical pendulum, a mass on the end of a string, with the other end of the string fixed to the ceiling. Given the proper push, this pendulum can swing in a circle at an angle q of 25.5 with respect to the vertical, maintaining the same height throughout its motion...

U.s. history
3.) a 6.) a

Chemistry
7 grams of chloride was dissolved in water. 20 ml of lead(II)nitrate was used to completely precipitate all chloride (assume atomic mass of 35g/mol). What is the molarity of the Lead(II) Nitrate solution.

Chemistry
thank you

Chemistry
DrBob222, Is the answer 5M?

Chemistry
7 grams of chloride was dissolved in water. 20 ml of lead(II)nitrate was used to completely precipitate all chloride (assume atomic mass of 35g/mol). What is the molarity of the Lead(II) Nitrate solution.

Physics
While following the directions on a treasure map, a pirate walks 36.6 m north, then turns and walks 6.3 m east. A.) What is the magnitude of the single straight-line displacement that the pirate could have taken to reach the treasure? Answer in units of m. *The answer to A.) i...

biology
Also, i almost forgot it also is 24 carbons, 48 hydrogen, 24 oxygen.

biology
1. 6 Carbon atoms per molecule. 4 Molecules. That's all i know. xD

political science
I do believe that separating the powers among various inter-connected governments is a successful cure because it prevents one branch of government from becoming too powerful over another. I don’t think one branch can completely take over but I think sometimes they find w...

political science
Do you buy James Madison's argument in Federalist 10 and Federalist 51 that separating powers among various inter-connected governments is a successful cure of the "mischief of factions?" Can one faction gain control of enough of our political system to diminish ...

Math
For each of the equations, solve for y in terms of x. 2x-3y=12 5x+2y=7 How do I do this?

Math
43

algebra
I need help with doing this problem... 5x-7(2-4x). Any idea how to do it?

chemistry
If you assume that there is 5% acetic acid in vinegar, how much vinegar should you weigh out so that the endpoint requires 25.0 mL of 0.186 M NaOH?

Physics
A)What is the equation for equivalent resistance for resistors wired in series? What about series wiring makes resistors in series add the way they do? B)What is the equation for capacitors wired in parallel? What about parallel wiring makes capacitors add the way they do? I k...

budgeting
COLA raises are linked to the national inflation rate I am not American and I am aware of that I am not sure if we have that in England.

budgeting
the answer to the last one is B. This is an expense the person overlooked or did not account for when setting up the budget.

chemistry
i got 6.023

chemistry
A sample of gas in a closed container at a temperature of 83C and a pressure of 9 atm is heated to 259C. What pressure does the gas exert at the higher temperature? Answer in units of atm

chemistry
i'm not getting the right answer

chemistry
How many liters are occupied by 1.05 mol of nitrogen at 198C and 0.564 atm pressure? Answer in units of L

chemistry
it would make more N2O5?

chemistry
Consider the system 2N2O5(g) <----> 2N2O4(g) + O2(g) + heat at equilibrium at 25C. If the temperature were raised would the equilibrium be shifted to produce more N2O5 or more N2O4? 1. more N2O4 2. more N2O5 3. There would be no effect.

chemistry
convert a pressure of 1.75 atm to kpa

chemistry
convert a pressure of 1.75 atm to kpa

Homework Help
lol Ms. Sue knows nothing

chem
A mass of 7 kg of water is raised from 8 degrees C to the boiling point 100 degrees C. How much heat is required? The specific heat of water is 1000 cal/kg · degrees C. Answer in units of cal I got 644000, is that right?

chem
Which statement is wrong? 1. Adding the same amount of heat to two different objects will produce the same increase in temperature. 2. When the same amount of heat produces different changes in temperature in two substances of the same mass, we say that they have different spe...

chemistry
it's 2.01*10^5

chemistry
281400

chemistry
I'm still not sure I'm doing this right. I get 1.042E-16

chem
How many molecules are in 1.60 g of SO2? Answer in units of molec

chem
is it 1.686×10^30

chem
What is the volume of 2.8 × 10^6 molecules He? Answer in units of L

chem
At STP, what is the volume of 8.38 mol of nitrogen gas? Answer in units of L

chem
How many molecules are in 1.60 g of SO2? Answer in units of molec

chem
Do I have to change celcius to K?

chem
At 119 degrees C, the pressure of a sample of nitrogen is 1.94 atm. What will the pressure be at 282 degrees C, assuming constant volume? Answer in units of atm

chem
A sample of hydrogen gas occupies 16.8 L at STP. How many moles of the gas are present? Answer in units of mol

chem
Determine the mass of 7.79 ×1023 atoms Cl. Answer in units of g

chem
How many molecules are in 12.2 g NO2? Answer in units of molec

chemistry
but what happens to the concentration of SO2? does it decrease?

chemistry
What happens to the concentration of SO2(g) when the total pressure on the equilibrium reaction 2 SO2(g) + O2(g) <---> 2 SO3(g) is increased (by compression)? I thought it remained the same but that was incorrect.

chemistry
how do I know which side heat is on?

chemistry
Consider the reaction at equilibrium: 2NO2(g) <---> N2O2(g) + O2(g) for which, H = −20.4 kJ · mol−1. If you decrease the temperature of the system, what will occur?

chemistry
Consider the combustion of glucose: C6H12O6(s) + 6O2(g) <---> 6CO2(g) + 6H2O(g) H = −3 kJ/mol Which condition I) Adding more carbon dioxide; II) Performing the reaction in a hotter environment; III) Decreasing the pressure of the system; IV) Adding a reagent that i...

chemistry
What happens to the concentration of NO(g) when the total pressure on the equilibrium reaction 3NO2(g) + H2O <---> 2HNO3(aq) + NO(g) is increased (by compression)? 1. increases 2. remains the same 3. decreases 4. Unable to determine

writing
I am going to go with saying the answer is not B so you have the option of guessing between A, C, and D.

Chemistry
energy required to raise the temp of H2O from -15C to 125c

physics
Singapore. Looked at the results after the quiz and got it wrong when i put New Zealand.

health
Ms. Sue you are incorrect the correct answer would be D.

Algebra
g(x) = 10 over x + 7

physics
nevermind, i figured it out.

physics
A professor drives off with his car (mass 800 kg), but forgot to take his coffee mug (mass 0.35 kg) off the roof. The coefficient of static friction between the mug and the roof is 1.1, and the coefficient of kinetic friction is 0.5. What is the maximum acceleration of the car...

english
Critical thinking: alien tour guide

english
One of your aliens looks down and becomes very confused, so you tell him that there is a game going on

Physics
suppose that the charge on the electron and proton did not have the same magnitude but instead differed by one part in 10^10. What would be the net charge on a 1.0 kg sample of helium gas?

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