Tuesday
March 28, 2017

# Posts by peter

Total # Posts: 1,014

chemistry
according to the data in the merck index,if 1,0g of aspirin is dissolved in 100ml of water at 37,how much aspirin will precipitate out of solution when it is cooled to 25.
March 18, 2017

english
Who am I? I am a national builder My favourite letter is K My favourite food is Japanese
March 17, 2017

Data
There are 52 white keys on a piano. The lowest key is A. The keys are designated A, B, C, D, E, F, and G in succession, and then the sequence of letters repeats, ending with a C for the highest key. a) If five notes are played simultaneously, in how many ways could the notes ...
March 5, 2017

math
there were 825 pupils in a school. 52 percent were boys. more boys joined the school and the percentage of boys became 64 percent of the new total. how many boys joined the school?
February 23, 2017

Data
You are making a string of coloured balloons as a decoration for the formal. If you have five green, six gold, and four white balloons, in how many ways can you arrange them along the string?
February 21, 2017

Algebra
Two cars leave town at the same time going in opposite directions. One travels 44 mi/h and the other travels 47 mi/h. In how many hours will they be 69 miles apart?
February 15, 2017

Physiscs
Hello, I have a doubt about inertia in a uniform bar and axis of rotation.. What's the difference between a lengthwise axis and a parallel one? In some books I have found that when we're talking about lengthwise axis that pass through the center of the bar the inertia ...
February 11, 2017

Math
an employee is paid \$3600 for the first month. she is paid an additional 1% at the end of the second month, which means a total of \$3636. she continues to receive a 1% raise each month for a full year. what is her total salary at the end of the year? answer is 45,648, how??
January 24, 2017

Math
The answer in my textbook says its \$45,648.
January 23, 2017

Math
an employee is paid \$3600 for the first month. she is paid an additional 1% at the end of the second month, which means a total of \$3636. she continues to receive a 1% raise each month for a full year. what is her total salary at the end of the year?
January 23, 2017

math
The sum of the first 9 terms of an arithmetic series is 144, and the sum of the first 14 terms is 329. Find the first 4 terms of the series.
January 23, 2017

Chemistry
1) What volume of oxygen gas at 28 Celsius and 102 kPa is needed to react completely with 150 g of iron according to the following reaction. Fe(s) + O2 (g) FeO(s) 2) A bunsen burner is lit in a lab that at 24.7 Celcius and 1.07 atm. What mass of water is produced in the ...
January 21, 2017

Math
On his 12th birthday Enoch's grandparent's deposited \$25 into a savings account for him. Each month after that up to and including his 20th birthday, they deposit \$10 more than the previous month. How much money will Enoch have on his 20th birthday, excluding interest...
January 19, 2017

Accounting
What equation was used to get the answer in requirement 3? Consulting to control costs. Requirement 1. Compute Draper's predetermined overhead (OH) allocation rate for 2018. Estimated OH costs / Estimated direct labor costs = Predetermined OH allocation rate \$198,000 / \$...
January 14, 2017

Math
Help me Bobpursley is dumb Serge invests \$700 at 5.75% per year, compounded quarterly. When the account is closed, its value will be \$950. How long will Serge’s money be invested?
January 12, 2017

Math
It doesnt get me the right answer.
January 12, 2017

Math
Serge invests \$700 at 5.75% per year, compounded quarterly. When the account is closed, its value will be \$950. How long will Serge’s money be invested?
January 12, 2017

Math
Angelica ran in a half-marathon. The length of the race was 21.1 km. She ran 1700 m in the first 10 min of the race. In each 10-min interval after the first one, her distance decreased by 4%. How far did she run in the tenth 10-min interval?
January 10, 2017

Physics
An alloy of iron and silver has a total mass of 30 grams and a volume of 20.4 centimetre cube Calculate the mass of iron only and the volume silver only Please help
January 7, 2017

Math
However, sin(x)=0 at x=0 (high tide), and we want y to be at the center line 3 hours before high tide. So, shifting left 3 hours, we get y = 4sin(?/6 (x+3)) + 10 Can you explain how you got that part?
December 18, 2016

Math
I got the rest, can you help me with part e)? I'm not sure what it is asking... e) Compare your models. Which is the simplest representation if time is referenced to high tide? low tide? Explain why there is a difference.
December 18, 2016

Math
3. At the end of a dock, high tide of 14 m is recorded at 9:00 a.m. Low tide of 6 m is recorded at 3:00 p.m. A sinusoidal function can model the water depth versus time. a) Construct a model for the water depth using a cosine function, where time is measured in hours past high...
December 18, 2016

Science
I can dispense 300 liters of liquid continuously in one hour from a given temp. of 22*c down to 7*c. (delta T=15) How many liters and in what time can I dispense from a temp. of 24*c down to 3*c ? (delia T=21)
December 7, 2016

Math
December 5, 2016

Math
December 5, 2016

Math
A support wire to the top of a newly planted tree is 15 m long. It forms an angle of 30 degrees to the ground. On the same side of the tree, a second wire is also attached to the top of the tree, but it makes an angle of 45 degrees to the ground. Determine an exact expression ...
December 5, 2016

Gauss-Jordan elimination
[1 1 1|7] [1-1-1|1] [1-1-]|3]
November 21, 2016

Math
5/9 ,7/18 and 1/2 arranged from the smallest to the largest
October 16, 2016

Probability-Cards
As shown above, a classic deck of cards is made up of 52 cards, 26 are black, 26 are red. Each color is split into two suits of 13 cards each (clubs and spades are black and hearts and diamonds are red). Each suit is split into 13 individual cards (Ace, 2-10, Jack, Queen, and ...
October 7, 2016

CHE 111-03L
The following system is at equilibrium: 2X(s)+4Y(g)⇌Z(g) Classify each of the following actions by whether it causes a leftward shift, a rightward shift, or no shift in the direction of the net reaction. Half the Volume Remove Some X Double the Volume Add More X
October 2, 2016

Math
Write and expression that has a value of 100 and the following restrictions: 1. Uses each of the four operations at most once 2. Uses no parentheses 3. Use only the digit 3
September 8, 2016

Art Study
Thanks for nothing. You don't need a picture to know!
August 25, 2016

Art Study
What does the expression of this superhero mean? Which of the following steps of art critique are you conducting for this type of question? describe analyze present interpret I think B?
August 25, 2016

math
Mr. Vasil drove 405 miles on 15 gallons of gas. How many miles can he drive on 1 gallon?
August 23, 2016

Math
Denise bought some lace to sew around 3 square pillows. Each pillow measured 4 incheson each side. How many feet of lace did denise need for all 3 sides?
August 18, 2016

Science
Explain the measures toreduce the problems associated with mining and extraction of metal
August 3, 2016

statistics
A jar contains 2 red balls, 2 blue balls, 2 green balls and 1 orange ball. Balls are randomly selected, without replacement, until 2 of the same colour are obtained. Calculate the probability that more than 3 balls must be selected.
July 2, 2016

math
find the number that is twelve and a quarter times greater than its reciprocal<x
June 29, 2016

CALCULUS
State the intercepts, domain and range for y= |0.5x^2-2|.
June 21, 2016

science
percentage of water of crystallization in Fe(NO3)2
June 14, 2016

algebra 1
I'm so sorry, I made a mistake in the question!! It is the best measure of center for second period!! Shall I repost?
June 2, 2016

algebra 1
There is no outlier. I added one and the interquartile changed.
June 2, 2016

algebra 1
A survey was taken of students in math classes to find out how many hours per day students spend on social media. The survey results for the first-, second-, and third-period classes are as follows: First period: 2, 4, 3, 1, 0, 2, 1, 3, 1, 4, 9, 2, 4, 3, 0 Second period: 3, 2...
June 2, 2016

Algebra 1
Wait please! I need another website! I still don't necessarily understand. I don't see any outliers. I know that an outlier would affect the median
June 2, 2016

Algebra 1
Hmm, then would it be D? Also, I am not guessing I am just unsure
June 2, 2016

Algebra 1
A survey was taken of students in math classes to find out how many hours per day students spend on social media. The survey results for the first-, second-, and third-period classes are as follows: First period: 2, 4, 3, 1, 0, 2, 1, 3, 1, 4, 9, 2, 4, 3, 0 Second period: 3, 2...
June 2, 2016

Calculus
An observer 150 feet from point C, where a weather balloon has been released. The balloon rises vertically at a rate of 8ft/sec/. At the very instant the balloon is 250 above ground how far is it from the observer? How Quickly is it moving away from the observer at that moment...
May 18, 2016

PHYSICS
A 6.00g bullet is fired horizontally into a 1.50kg wooden block resting on a horizontal surface. The coefficient of kinetic friction between block and surface is .30. the bullet remains embedded in the block, which is oserved to slide .25m along the surface before stopping. ...
May 10, 2016

Math
An object's velocity after t seconds is v(t)= 38-2t feet per second. a. How many seconds does it take for the object to come to a stop (velocity = 0)? b. How far does the car travel during that time? c. How many seconds does it take the car to travel half the distance in ...
April 30, 2016

Math
Can you define the variable, four more than a number divided by 2 is ten.
April 22, 2016

life orientation
Give 3 human rights violation or discrimination
April 17, 2016

Physics
A girl standing on a stationary uniform plank 10m long. The plank can move with negligible friction along the surface of the water. A) the girl walks along the plank with a velocity of 2ms-1 relative to the plank until she reaches the end of the plank. The centre of mass of ...
April 7, 2016

Physics
The activity of a sample of 31Si (T1/2 = 9.43×103 s) is 7.88×105 decays per second. What is the mass of sample present?
March 26, 2016

maths
A vehicle travels equal distances at 60km/h and 90km/h.calculate its average speed
March 21, 2016

algebra 1
March 21, 2016

algebra 1
Given the data set (5, 9), (13, 12), (23, 16), which of the following equations best represents a line of best fit? y = three fourthsx − 7 y = four fifthsx + 7 *** y = three over twox + 7 y = two thirdsx − 7
March 21, 2016

Math
Determine whether or not the given linear transformation is invertible. If it is invertible, compute its inverse. (If the transformation is not invertible, enter IMPOSSIBLE. Use theta for θ.) Tθ:R2→R2, the reflection of the plane in the line formed by the angle...
March 10, 2016

Linear Algebra
Find the 3x4 matrix associated with the derivative transformation D:P3→P2 with respect to B = { 1, x, x2, x3} and B' = {1, x, x2}.
March 10, 2016

Physics
Plane A has radius of 6000km and a mass of 6E24kg. The plane B has a radius 1500km and a mass of 1.5E22kg. Which of the planetsame is more likely to have a large metal core?
March 9, 2016

Pigskin geography week number 20
Which team will visit a city within its own state for a game
February 23, 2016

Math
A clock starts at 12:59. What time is it after the minute hand rotates 24 degrees?
February 18, 2016

Physics
A uniform electric field with a magnitude of 6100 V m−1 points in the positive x direction. Find the change in electric potential energy when a +14 μC charge is moved 5 cm in the positive x direction. Answer in joules.
February 5, 2016

Auburn
How do you write 234,567 in roman numeral's
February 3, 2016

Math
The cost of fencing a square field at ₹ 27.50 per metre is ₹55000 . Find the cost of reaping the field at ₹45 per 100 metre² .
January 29, 2016

Geography,maths literecy,life-science,agriculture,LO,sepedi and english
Which career can suit me?
January 13, 2016

Math
Rafi had a board that was 15 1/2 FEET long he cut three pieces off the board that are each 3 and 7/8 feet long how much of the board is left
January 12, 2016

physic
If the gravitational force f is given by f= gm, m2/r^2 derive the dimensions of the constant g.
January 9, 2016

physics
A clown is rocking on a rocking chair in the dark. His glowing red nose moves back and forth a distance of 0.42m exactly 30 times a minute in a simple harmonic motion. (a) what is the amplitude of this motion? (b) what is the period of this motion? (c) what is the frequency of...
December 12, 2015

physics
How much would the time keeping of a pendulum clock be affected by taking it to the moon? Gravity is 1.6m/s ^2, compared with 10m/s ^2 on the earth.
December 12, 2015

stat
CI=2.86 ± 1.76*0.78/√15 =2.86 ± 0.3545 c) (2.51, 3.21)
December 5, 2015

English - The Red Badge of Courage
I have all the answers for the test. Its 1-19 but #19 is a short answer so ill do 1-18 a B C D A C B A A A B A C A D A C D
November 30, 2015

physics
What force is required to slide a 200 kg box up a 25 degree incline if the coefficient of friction is 0.60?
November 24, 2015

math
six years ago, jim was four times as old as Fe. In four years, he would be twice as old as fe.How old are they now?
November 23, 2015

Physics
The interior of a submarine located at a depth of 50 m in seawater is maintained at sea-level atmospheric pressure. Find the force acting on a window 20 cm square. The density of seawater is 1.03 × 103 kg/m3
November 16, 2015

swagodimo
Calculate the number of moles of hcl(aq)added to sodium thiosulphate
November 15, 2015

Physics
If the specific heat of ice is 0.5 cal/g degree celsius, how much heat must be released from 5 g of water at 0 degree celsius to change it to ice at -4 degree celsius?
November 14, 2015

Algebra
2. X - 7 > 10 X > ____ 3. 3x ≤ 21 X ≤ ____ 4.5a - 2 < 18 A<____ 5. 2t+8 ≥ -4(t+1) T ≥ ____ Could someone Please help me I have no idea how to do this
October 28, 2015

Physics
A gun shoots a bullet at 1200 m/s at an angle of 600 above the horizontal. Neglecting air resistance, determine: a.) its time of flight b.) its range
October 7, 2015

Algebra
Rewrite the set {x|2Ex<33:xEN} in roster form
October 5, 2015

Ochem
Write the equation for the reaction that occurs when sodium carbonate is added to the mixture of the reaction and water (hint: a gas is evolved). This is for benzocaine experiment
October 4, 2015

Organic Chemistry
Write the equation for the reaction that occurs when sodium carbonate is added to the mixture of the reaction and water (hint: a gas is evolved). This is for benzocaine experiment
October 4, 2015

Organic Chem 2
Write the equation for the reaction that occurs when sodium carbonate is added to the mixture of the reaction and water (hint: a gas is evolved). This is for benzocaine experiment
October 4, 2015

Algebra
How do I turn this into a algebraic expression, eight more than six times a number added to one more than nine times the number
September 23, 2015

MATH
Factorise 3k+1-3kh-h
September 13, 2015

Physics
Thanks Damon!!
September 13, 2015

Physics
The driver pushes the accelerator pedal as far down as possible. The car does not accelerate above a certain maximum speed. Explain the reason for this in terms of the forces acting on the car.
September 13, 2015

algeb
2) 100%-15% = 85% 85/100 = 0.85 26.86/0.85= sales price
September 13, 2015

Physics
A 2000 kg starts from rest and gains a velocity of 20 m/s in 5 s. What force wad applied on it?
August 29, 2015

chs
Two wires support an electricity pole. if the wires make angles of 58°and 67° with the ground and |AB|=21m, calculate the lengths of the wires
August 16, 2015

Data management
A card is drawn from a shuffled deck of 52 cards. What's th probability that the card is a spade or a face card?
July 29, 2015

Math
You have three toonies and two loonies in your pocket. You pull one coin out and then pull out another (without replacing the first) 1) show the total of all the probabilities is 1 2) show using combinations that part 1) is correct
July 14, 2015

math
5t^2-7t=1 find exact solution
July 2, 2015

chem
A 0.158 g sample of magnesium metal reacts completely with 100.0 mL of 1.0 M hydrochloric acid in a coffee cup calorimeter. The temperature of the solution rose from 25.6°C to 32.8°C. What is ∆Hrxn? Assume the specific heat of the solution is 4.184 J/mol-K and ...
June 25, 2015

socialology
Describe a situation in which you might see a gesselschaft community partnered with mechanical solidarity.
June 16, 2015

english
"I hope this song will help you to bring your country back to its stage it was and motivate to develop it more further. " this dialogue
May 6, 2015

english
"I hope this song will help you to bring your country back to its stage it was and motivate to develop it more further. " Since the logic of the dialogue is not correct; write a short reply going against him. ( DEBATE )
May 6, 2015

math
prove that: 4cosec2ACot2A=cosec^2A - sec^2A
May 6, 2015

Maths
A pool is 12m long and 7m wide it is surrounded by a 3m paved area on all sides the whole complex is enclosed by a 2m high fence what is the total length of this fencing
May 4, 2015

Algebra
a car driver accelerates to a speed of 35 miles per hour and then takes her foot off the gas pedal even though she does not press the brake pedal at any time she eventually rolls to a stop which of the following most likely causes the car to come to a stop
April 17, 2015

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