Tuesday
November 25, 2014

Posts by Sam


Total # Posts: 4,077

Algebra math Question
1574.0
November 24, 2014

physics
Question: Object A is moving at a maximum speed of 6m/s towards Object B. At 50 m away Object B accelerates from the approaching Object A at 0.3m/s^2. Does Object A catch up to Object B and if yes when? I don't know how to answer this at all or even which kinematic ...
November 24, 2014

data
I am looking for the school report each year regarding school violence and vandalism? I can not find this information on the internet, can you help me? Missouri school report.
November 24, 2014

chem
What are the expected charges on the following transition metals? Mn= Rh=
November 23, 2014

College English
can you write a essay map sentence from this sentence Christmas shopping shows that the law of the jungle is still with us.
November 23, 2014

culture
What culture would someone have if they live in Missouri
November 22, 2014

Chemistry
I dont understand where you are getting 6.022E23 from
November 21, 2014

Chemistry
A sample of sodium sulfate, Li2SO4, contains 6.78 x 10^23 formula units. How many moles of Li2SO4 are there in the sample? How many moles of Li+ ions are there in the sample?
November 21, 2014

college chem
Calculate the molar enthalpy of reaction standard enthalpy of formation below. H20 = -285.8 kj/mole H+ = 0.0 kj/mole OH- = -229.9 kj/mol H+(aq) + OH-(aq)→H2O(l) For this, don't you do the summation of products x stoichemtry + the sum of reactants x stoich. from there...
November 20, 2014

College Chem
How would temperature changes observed using a calorimeter differ for exothermic and endothermic reactions?
November 20, 2014

college chem
A student constructs a galvanic cell that has a strip of iron metal immersed in a solution of 0.1M Fe(NO3)2 as one half-cell and a strip of zinc metal immersed in a solution of 0.1M Zn(NO3)2 as the other half-cell. The measured cell potential is less than zero when the ...
November 19, 2014

physics
Determine the quantity of heat required to convert 1kg of ice at −20 degrees Celsius to water at 100 degrees Celsius? Specific heat capacities of water and ice water are 2302 J/kgK and 4186 J/kgK respectively
November 19, 2014

Chemistry, HELP!
1) If a soil had a pH of 5.5, how many milli-equivalents of acids would it have per 100 grams? 2) How many milli-equivalents of Ca need to be added to increase the pH of the soil to 6.8?
November 18, 2014

physics
In an experiment to verify Newton's law of cooling, the temperature of hot water in a calorimeter T/oC is plotted against time t/min. Which of the following is true about the graph? a. the graph is linear and parallel to the T-axis b. the slope of the graph is positive c. ...
November 18, 2014

physics
An air puck of mass 0.278 kg is tied to a string and allowed to revolve in a circle of radius 1.25 m on a horizontal, frictionless table. The other end of the string passes through a hole in the center of the table and a mass of 0.45 kg is tied to it. The suspended mass ...
November 16, 2014

Calc
evaluate the integral of 2e^xdx from -5 to 5.
November 16, 2014

English
Oh, okay. So A and D cannot be it. C would be my next choice, based on the quote.
November 14, 2014

English
Thoreau included the following sentence in Walden: "There is some of the same fitness in a man's building his own house that there is in a bird's building its own nest." Which of the following statements rephrases his literal comparison as a metaphor? A. A ...
November 14, 2014

Math
Which term best describes the solution of the situation represented by the system of inequalities? (Assume that x >= 0 and y >= 0.) 3x + 4y <= 8 2x + 4y <= 6 Answer choices given are: a. alternate optimal solutions b. one optimal solution c. unbounded d. infeasible...
November 14, 2014

stats
Weights of parts are normally distributed with varianceσ2. measurement error is normally distributedwith mean zero and variance 0.5σ2, independent ofthe part weights, and adds to the part weight. Upper andlower specifications are centered at 3σ about the ...
November 14, 2014

Physics
A block is placed on a frictionless ramp at a height of 14.5 m above the ground. Starting from rest, the block slides down the ramp. At the bottom of the ramp, the block slides onto a frictionless horizontal track without slowing down.At the end of the horizontal track, the ...
November 13, 2014

Engineering
A plane element is subjected to a shear stress τ = 360MPa which results to a shear strain σ = 0.008rad. a) determine the shear modulus G of the element b)What is the horizontal displacement, d, of the element if te height of the element is equal to 50mm I worked out ...
November 11, 2014

Math
Help meits due tomorrow
November 9, 2014

Math
Brandon buys a radio for 43.99$ in a state where the sales tax is 7% How much did he pay in taxes ? What is the total Brandon pays for the radio?
November 9, 2014

math count warm up
What positive four-digit integer has its thousands and hundreds digits add up to the tens digit. Its hundreds and tens digits add up to its once digit and its tens and ones digits add up to the two digit number formed by the thousands and hundreds digits? Answer is 1459 wanted...
November 9, 2014

physics
In a Little League baseball game, the 145 g ball enters the strike zone with a speed of 13.0 m/s. The batter hits the ball, and it leaves his bat with a speed of 21.0 m/s in exactly the opposite direction. 1. what is the magnitude of the impulse delivered by the bat to the ...
November 5, 2014

physics
An ice hockey puck slides along the ice at 15 m/s . A hockey stick delivers an impulse of 4.8kg/m/s causing the puck to move off in the opposite direction with the same speed. what is the mass of the puck?
November 5, 2014

math
thanks so much! can you help me understand this one as well? I have the integral from 0 to 2-2x of integrate (2-2x-y)dy... I thought you just take the integral with respect to y so it would be -y^2/2? (plugging the bounds it that would be -(2-2x)^2/2 but it comes out to be (2-...
November 4, 2014

math
integral of y^3/(y^4 +1) dy I don't get how you get (1/4) ln(y^4 +1) out of this. I thought you would do the quotient rule. but is that the same for integrals as it is the derivatice? help!
November 4, 2014

sociology
Mattie is a new sociology professor at the local college. During her first lecture, she noticed that some students were yawning. Based on her interpretation of the students yawning, Mattie has decided she is a boring teacher. This is an example of the process referred to as ...
October 31, 2014

stats
In the transmission of digital information, the probability that a bit has high, moderate, and low distortion is 0.01, 0.04, and 0.95, respectively. Suppose that three bits are transmitted and that the amount of distortion of each bit is assumed to be independent. Let X and Y ...
October 31, 2014

Physics
A ball player hits a home run, and the baseball just clears a wall 20.3 m high located 119.0 m from home plate. The ball is hit an an angle of 35° to the horizontal, and air resistance is negligible. Assume the ball is hit at a height of 1.0 m above the ground. (a) What is...
October 23, 2014

math
how would you calculate teh largest prime number given a number x so for example say someone inputs 8 , the largest prime number is 7.
October 23, 2014

Calculus
I need help determining the intervals of increase, decrease and the intervals of upward and downward concavity given f prime. f'(x)=(64x^4 - 125x) ^(-2/3). Im not sure how to solve this. I know that the function has no intervals of decrease, its the rest im having trouble ...
October 23, 2014

Teacherd aide
Thank you very much Ms. Sue! (:
October 20, 2014

Teacherd aide
3.   Which of the following techniques to arouse curiosity would work best with junior high students? A. Set up a curiosity corner. B. Use a "feelie" box. C. Use a teaser to introduce the topic. D. Set up a discovery learning center. I ...
October 20, 2014

Physics
A 27.9 kg block (m1) is on a horizontal surface, connected to a 5.3 kg block (m2) by a massless string. The pulley is massless and frictionless. A force of 239.3 N acts on m1 at an angle of 28.9°. The coefficient of kinetic friction between m1 and the surface is 0.181. ...
October 20, 2014

Physics
Starting from rest, a 98-kg firefighter slides down a fire pole. The average frictional force everted on him by the pole has a magnitude of 700 N, and his speed at the bottom of the pole is 3.4 m/s. How far did he slide down the pole?
October 19, 2014

Spanish Questions?
For 16 I think you should just do some research on what the games are like then you can find out what's different. Just google Pan American and Olympic Games and look up information on Wikipedia for comparison. The answer to 17 is the theory of natural selection. Darwin ...
October 17, 2014

Algebra
Well if you look up Cowling's rule it states:fraction of the adult dose obtained by dividing the age of the child at the nearest birthday by 24 (source internet dictionary). So let's let the age of the child be represented by the variable x. so x/24 is the fraction of ...
October 17, 2014

algebra 1
I think you may have messed up on your signs a tad because you added 18 to both sides instead of subtracting it. 18-3w=4 +3w +3w -4 -4 You can add over the 3w to make it positive and subtract the four from the 18 like so 18-4=3w 18-4 simplifies to 14 so 14=3w now divide by 3 ...
October 17, 2014

Physics
A marble rolls off a lab table that is 0.92 m high. It rolls off the table with a velocity of 1.66 m/s. How far from the base of the table must the chip be placed so that the marble will hit the chip?
October 17, 2014

Calculus
Looks good
October 17, 2014

S.S
You can find the answers to these questions online just by googling them.
October 17, 2014

Physics - Spring Gun
A toy gun uses a spring to shoot a ball with a mass of 5.0 g. The spring is “loaded” by compressing it 5.0 cm and has a spring constant of 288 N/m. The end of the spring is at the end of the gun (the ball does not travel any distance inside the gun after the spring) ...
October 13, 2014

Soil Science (PAW), HELP!!
a) If the silty clay loam soil profile is 1 meter deep, how much plant available water (cm) can potentially be held in the upper meter of soil? b) If the silty clay loam profile is 40 inches deep, how many inches of plant available water can potentially be held in the upper 40...
October 12, 2014

pre-calculus
You are given a pair of equations, one representing a supply curve and the other representing a demand curve, where p is the unit price for x items. 80 p + x - 380 = 0 and 84 p - x - 40 = 0 a. Identify which is the supply curve and demand curve and the appropriate domain. Put ...
October 10, 2014

College Science
A chandelier is suspended by two identical, vertical chains side by side. The chandelier's mass is m = 5.3 kg. A. If the tension in one chain is represented by T, write an expression for this tension in terms of m and g, the gravitational acceleration on the Earth's ...
October 9, 2014

physics
a particle is moving in a straight line the particle starts with speed 5ms and accelerates at a constant rate of 2ms for 8s it then decelerates at a constant rate coming to rest in a further 12s find the total distance during 20s it is 230 but i dont understand how
October 9, 2014

Physics
A block of wood of mass 1.2kg initially at rest is free to slide on a horizontal surface. A bullet of mass 100g travelling at a speed of 780ms^-1 is fired horizontally at the block and becomes embedded in it. Calculate the speed the block and bullet move off at immediately ...
October 8, 2014

Math
840
October 8, 2014

chemistry 112
A volume of 60.0mL of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid (H2SO4). What was the molarity of the KOH solution if 19.2mL of 1.50 M H2SO4 was needed? The equation is 2KOH(aq)+H2SO4(aq)→K2SO4(aq)+2H2O(l) Express the ...
October 7, 2014

Algebra
the points (1,4), (3,8) and (8,3) lie on the graph whose equation is of the form: y=a|x-b|+c where a,b and c are real numbers. find a,b and c.
October 5, 2014

global studies
Nobles
October 5, 2014

physics
The second part of the problem can be solved through the following method: Ki+Ui=Kf+Uf, which indicates that the inital KE+initial PE=final KE+ final PE. Because there is no inital KE or final PE, those values will both be zero. You are then left with just mgh=1/2 mv^2. You ...
October 2, 2014

Biology
What are some of the reasons why everyone does not have the same pulse rate at rest. I think is would be your age, weight,stress.. but i am not sure
October 1, 2014

Biology
A 50 year old male who is not overweight and has normal blood cholesterol levels suffers a heart attack. Propose a possible explanation i think the answer would be genetics...
October 1, 2014

Chem (general)
Thank you so much for the help Dr. Bob222! I was thinking there wouldn't be anything left since it was the limiting reactant but just wanted to make sure . Thanks again!!
October 1, 2014

Chem (general)
Little confused on how to get part B. A) if 3.00g of hydrosulfuric acid is reacted with 3.00g of silver nitrate, calculate the mass (in g) of solid silver sulfide formed. Which is the limiting reactant? (Hint: the other product is nitric acid). B) calculate the moles of EACH ...
October 1, 2014

math
write a ratio in 3 ways, comparing the first quantity to the second. A week has 5 school days and 2 weekends. Second question about 1 in 4 people swims at least 6 times each year.
September 29, 2014

geometry
Obtuse angle
September 29, 2014

physics
A bullet is fired straight up from a gun with a muzzle velocity of 214 m/s. Neglecting air resistance, what will be its displacement after 8.2 s? The acceleration of gravity is 9.8 m/s2 . Answer in units of m
September 28, 2014

Science-HELP?
thank you ms. sue and damon
September 26, 2014

Science-HELP?
A map of Florida is an example of a(n) ________. *I researched this a little bit and I thought it might be peninsula. Can someone verify this for me please? There aren't any choices either.
September 26, 2014

Physics
Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. In one test, this gun accelerates a 1.9-kg projectile from rest to a speed of 5.1 × 103 m/s. The net force accelerating the projectile is 8.6 × 105 N. ...
September 25, 2014

Math
Scores on a marketing exam are known to be normally distribute with mean and standard deviation of 60 and 20, respectively. The syllabus suggests that the top 15% of the students will get an A in the course. What is the minimum score required to get an A?
September 25, 2014

Oceans
(I think I'm supposed to use residence time?) About 30,000 years ago, during the last glacial maximum, glaciers and ice sheets stored enough water to decrease the sea level by 120 m. Presently, there are about 3.05x106 km3 of ice contained within the Greenland glacial ...
September 25, 2014

SAT Math
A student states that for any positive integer n is the sum of n successive integers is always divisible by n. Which of the following can be used to disprove the student's statement? Please provide answer and how you got it! A) 1+2=3 B) 1+2+3=2x3 C) 1+2+3+4+5=3x5 D) p+(p+1...
September 24, 2014

math
John can build 7 birdhouses in 5 hours, write an equation that will allow john to calculate the time it will take to build any given number of houses. HOW MANY HOUSES in 40 hours? #2 How long will it take to build 35 houses?
September 24, 2014

math
Thank you, once again.
September 23, 2014

math
A recipe for fruit salad serves 4 people. It calls for 2 oranges and 16 grapes. You want to serve 10 people. How many oranges and how many grapes will you need?
September 23, 2014

Math
Solve the given quadratic equation exactly using the quadratic formula. Write the solutions in its simplest form. Using a calculator, determine all irrational solutions to the nearest thousandth. Separate the solutions with a comma and list the smaller one first. For the ...
September 23, 2014

Chemistry
How many grams of sodium carbonate are in a sodium carbonate sample that contains 1.773x10^17 carbon atoms? How do I work this out?
September 22, 2014

Chemistry
How many protons are contained in a circular puddle of mercury that is 8.5 inches wide and .25 inches deep?
September 22, 2014

science
THANK YOU MS. SUE
September 22, 2014

science
what is another path that a scientist might follow using the data from an experiment that did not support the hypothesis .
September 22, 2014

college physics
A 52.2 kg parachutist lands moving straight downward with a speed of 3.75 m/s. If the parachutist comes to rest with constant acceleration over a distance of 0.794 m, what force does the ground exert on her?
September 22, 2014

Math-HElP PLEASE??
On a certain hot summer's day, 300 people used the public swimming pool. The daily prices are $1.75 for children and $2.25 for adults. The recipients for admissions totaled $613.50. How many children and how many adults swam at the public pool that day? There were ___ ...
September 21, 2014

chemistry
Calculate the volume in liters of a M copper(II) sulfate solution that contains of copper(II) sulfate . Round your answer to significant digits.
September 21, 2014

math
Bananas are $0.59/pound. What is the constant of proportionality?
September 19, 2014

Math
A is correct in my condition
September 18, 2014

math
Line through (0,b) and (10,-5) is perpendicular to the line through (a,0) and (-6,-3). If all ordered pairs (a,b) which make the first sentence of this problem true are graphed, they all lie on a line. Find the equation of this line.
September 17, 2014

Math
THANK YOU DAMON VERY MUCH, YOU WERE VERY HELPFUL :)
September 16, 2014

Math
A number and its absolute value are equal. if you subtract 2 from the number, the new number and its absolute value are not equal.What do you do about the number?What is possible number that satisfies these conditions?
September 16, 2014

Math-PLEASE help me
Ohhhh, ok. I understand now. Thank you Mia so much! You've been most helpful. :D Goodnight.
September 15, 2014

Math-PLEASE help me
I was just about to reply and tell you that I subtracted when I was suppose to add but you replied first. :P So when I added them together I got 0. But you said my math was correct. I'm confused. >_<
September 15, 2014

Math-PLEASE help me
ok, so i drew a number line and the distance I got was -5.56. Is this correct?
September 15, 2014

Math-PLEASE help me
If the absolute value of a negative number is 2.78, what is the distance on the number line between the number and its absolute value? Explain your answer.
September 15, 2014

French
Yes, always. & no problem. :)
September 15, 2014

French
I don't see why it wouldn't be acceptable. It's an informal letter, not a business letter. if it was a formal letter you would say, " Bonjour Madame *insert name here*! But with an informal letter, it should be okay to exclude a name.
September 15, 2014

Math
If the absolute value of a negative number is 2.78, what is the distance on the number line between the number and its absolute value? Explain your answer. **I think it would be 2.78 because isn't the absolute value the distance from zero? So wouldn't it be the same? I...
September 15, 2014

math
THANK YOU SO MUCH, FOR ALL YOUR HELP. I get it know.
September 15, 2014

math
how would you get what x and k would equal?
September 15, 2014

math
find the values of the variables 32 40 96 120 112 x 144 180 k 230 how do you do this? what is the formula? Thank you
September 15, 2014

physics
A helicopter weighs 3920 newtons, caculated the force on it if it is ascending up at a rate of 2m/s squre ,what wil b force on helicopter if it is moving up with the constant speed of 4m/s .
September 15, 2014

Algebra help. ms. sue, steve
is it true?
September 12, 2014

Algebra
is it true or false?
September 12, 2014

Algebra
For all real numbers a and b, 2a • b = a^2 + b^2
September 12, 2014

Math-PLEASE check my answers
Ok, thank you Ms. Sue, once again! :)
September 11, 2014

Math-PLEASE check my answers
What types of problems can be solved using the greatest common factor? What types of problems can be solved using the least common multiple? Complete the explanation. *** Use the words 'same' and 'different' to complete the following sentences.*** Problems in ...
September 11, 2014

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