# Posts by Jen

Total # Posts: 3,531

Neutons Thrid law
Thank you that makes a lot of sense!

Neutons Thrid law
3. A force of 36 N gives a mass m1 an acceleration of 4.0 m/s2. The same force gives a mass m2 an acceleration of 12 m/s2. What acceleration will this force give to m1 and m2 if the two masses are fastened together? {3.0 m/s2}

Neutons Second Law
A 1200 kg car travelling at 50 km/h experiences an air resistance of 5000 N and road friction of 2200 N. If the wheels push with a force of 7500 N, what is the car's acceleration?

Acid Base Chem
During the course of an experiment with hydorgen phsophate (HPO42-) you find that it is functioning as a base. When you search for the Kb value of it you only find pKa1= 2.15, pKa2= 7.20, and pKa3= 12.35 of phosphoric acid (H3PO4). What is the Kb value??

Physics/Cars
Thank You!

Physics/Cars
Does the mass of the car matter when driving on the road? When skidding?

chemistry
30.2 g/mL

Physics
a bird is flying through the air with an air speed 12.6m/s heading 27.7 west of north. it is a windy day with wind velocity blowing at 8.95m/s heading 12.5 south of west. what is the velocity of the bird as seen by a person on the ground

Physics
your car has stalled and has come to rest on a level section of a busy street. you and a passenger decide to push the car to the side of the road so it will not interfere with the trafic. together you excert a combine horizontal force of 1320N. the coefficent of static ...

Calculus
Q: Gravel is being dumped from a conveyor belt at a rate of 25 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. How fast is the height of the pile increasing when the pile is 6 ft high? (Round your...

Math/Precal
How do i give the exact value for: (sin pi/8)(cos pi/24) + (cos pi/8)(sin pi/24)

PHYSICS
Object A experiences a gravitational force due to object B. How would that force change if the separation distance is halved, mA triples, and mB is reduced to one quarter of its original value?

math
A floor refinishing company charges \$1.91 per square foot to strip and refinish a tile floor for up to 1000 square feet. There is an additional charge of \$250 for toxic waste disposal for any job which includes more than 150 square feet of tile. (a) Find an equation for the ...

Biology - Evolution
THANK YOU!! :)

Biology - Evolution
Suppose you grabbed ten seeds from the large number of seeds that were present and planted them in a garden. During the summer you harvest 100 bean seeds from these 10 groups of plants? Would you wee the same distribution of seed size as when you first planted the seeds? ...

Maths
y = 3cos(3x)cos(10x) This function represents the displacement-time of a guitar string as it vibrates, the period of it is the beat frequency. What are the strengths and limitations of this model?

Chemistry
Would glass, plastic or cardboard be best to store milk so the lactic acid doesn't increase?

Literary Devices - English
What type of literary device is "dead in the eye"

accounting
6.70

math
: Use the formula from Part I to find the midpoint of the segment with endpoints at (-2, -1) and (0, 9). Show your work.

Chemistry
the longest wavelength of light that will cause an electron to be emitted from a metal is 520nm. what is the work function for this metal? (note: the work function is given as kJ/mole of electrons released)

Math
3/8 x 11/15 in its simplest form

French
oh sorry. lol. I thought the responses weren't showing so I kept typing it.

French
Also, is this correct Great job to the entire cast of Le Petit Nicolas! Excellent travail pour l'ensemble du casting de Le Petit Nicolas !

French
Also is this correct: Great job to the entire case of Le-petit Nicolas! Excellent travail pour l'ensemble du cas de Le-petit Nicolas !

French!!!!
So #1 is "Je la"? and also #4 , I didn't write "a retarder" .. What exactly are you referring to?

French
_________________________________ Also is this correct? 1.) I like comedy and this film has a lot of comedy -Je tiens comédie et ce film a beaucoup de comédie 2.) Overall the movie is successful in terms of comedy and entertainment. -Globalement, le film est un ...

French
Is this right? I personally think the movie is enjoyable and entertaining because the environment in which the film occured is bright Personnellement, je pense que le film est agréable et divertissant parce que l'environnement dans lequel le film est produit est ...

Physics
A Styrofoam bucket of negligible mass contains 1.75 kg of water and 0.450 kg of ice. More ice, from a refrigerator at -15.0∘C, is added to the mixture in the bucket, and when thermal equilibrium has been reached, the total mass of ice in the bucket is 0.884 kg. Assuming ...

chemistry
if 15 grams of ethane gas c2h6, reacts with 128 g oxygen un a combustion reaction, how many moles of water can be produced?

English
Either you must stop eating my food from the refrigerator or you must pay me for it. What sort of conjunction is used in the sentence? common,coordinating,etc

Math
the length of a wall in a floor plan is 6 1/2 inches.the actual wall is 78 feet long. find the scale of the floor plan The height of a building is 3 3/8 inches on a scale drawing. Find the actual height of the building if the scale used is 1inch:4feet. This is basically ratios...

History
What is the counterpart to the police jury? a. county government b. home rule

Math
Together Paul and Jack earned \$72 washing cars. Jack washed twice as many cars as Paul. If Paul washed 3 cars, how much did they charge to wash each car?

Math
What percent of 300 gal is 600 quarts? The answer I came up with is 50%. Is this correct?

Math
What percent of 300 gal is 600 quarts? The answer I came up with is 50%. Is this correct.

World history
What does this question mean? Discuss the effects of the development of the Atlantic trade and its impact on the participating civilizations from 1450-1750

Calculus
A home owner wants to fence in his yard of 600 sq. feet. Three sides are to be constructed with chain link fence at a cost of 3.25 per linear feet. The fourth side is to be constructed with a wood stockade fence at a cost of \$5.45 per linear foot. A) what is a complete model ...

Math
Jim runs 50% faster then Bob. In a 1200m race how much of a head start should Bob get to make the race fair  I got a 600m head start but am I right??

math
30 chocolates in a bowl. 12 are dark chocolate, 8 are white chocolate and 10 are coffee. what is the chance of getting a coffee chocolate?

Math
Sixty girls were scheduled to paint flower pots for the school's annual fair. When 3 of the girls became sick the rest of the girls had to paint 8 more flower pots each how many flower pots did they have to paint altogether ?

Math
In a high school reunion, the organizers decided to sell 1500 raffle tickets at 1000 each for the four prizes of 250,000 125,000 75,000 50,000 What is the expected value of one ticket? I got -670, is this correct? Thanks!

Physics
A walker's speed, v, is proportional to the ratio of his leg length, L, and the period of the repeating motion of his legs, T, that is, v ∝ L/T. If the period is measured to be proportional to Lp, where p = 3/5, what power of L must the speed be proportional to? ...

conversion

Calculus 1
i dont know'

Physics
Holding a long rope by its upper end, you lower it onto a scale. The rope has a mass of 0.160 kg per meter of length, and is lowered onto the scale at the constant rate of 1.30 m/s. (1) Calculate thrust. (2) At the instant when the amount of rope at rest on the scale has a ...

Math
Oh I get it now! Thanks a lot! :D

Math
How did it become 2/3? Does the 3 refer to the number of toss? And the 2 refer to the occurrence of the head? I'm sorry if I ask too many questions. Thank you for helping me!

Math
A coin is biased so that a head is twice as likely to occur as a tail. If the coin is tossed 3 times, what is the probability of getting 2 tails and 1 head? What do you mean by biased in probability?

Math
Thank you so much! I'm out-of-school kid.

Math
In a gambling game, a man is paid 400 if he draws a jack or queen and 500 if he draws a king or ace from an ordinary deck of 52 playing cards. If he draws any other card, he loses. How much should he pay to play if the game is fair? My answer is 138.46. Am I correct? Thank you!

Math
Oh okay. I see. Thanks a lot!

Math
The probability that a washing machine will operate satisfactorily for 3 years is 0.82 while the probability that a floor polisher will operate satisfactorily over the same period of time is 0.78. Find the probability that in a 3-year period, only the floor polisher will ...

Statistics
n=13 p=0.75 p (more than 11)

Probability
In a gambling game, a man is paid 400 if he draws a jack or queen and 500 if he draws a king or ace from an ordinary deck of 52 playing cards. If he draws any other card, he loses. How much should he pay to play if the game is fair? My answer is 138.46. Am I correct? Thank you...

Probability
The probability that a washing machine will operate satisfactorily for 3 years is 0.82 while the probability that a floor polisher will operate satisfactorily over the same period of time is 0.78. Find the probability that in a 3-year period, only the floor polisher will ...

Stats
Based on recent U.S. Census data of adults, approximately 48% are male. According to a 2013 study by The Henry J. Kaiser Family Foundation, 70% of U.S. adult males are obese while 58% of U.S. adult females are obese (round to THREE decimals). What is the probability of an U.S...

Tech
none are right

maths
how would you solve 14 = 0.9x(x - 6)

english

english

english

Physics
A 2500-kg car is traveling at 20 m/s around a road curve of radius 200 m. Find the central force acting on the car?

Trigonometry
a pizza has a diameter of 18 inches and it's divided into 8 equal parts, and you take one slice of it. what is tha central angle of your share in mills measurements? with a solution

math
Luanne estimates the sum of 39 + 15 is about 40 + 15, or 55. Jacob estimates the sum of 39 + 15 is 40 = 20 or 60 which one is closer to the exact sum?

Computer
100%

Science study skills
Me ^-^ is right! 5/5 100%!!!!

calculus
find the two numbers whose sum is 10, if the product of one by the cube of other is a maximum.

Finance
Organic Foods Inc. sells 50-pound bags of grapes to the public schools for \$10 a bag. The fixed costs of this operation are \$80,000, while the variable costs of grapes are \$.10 per pound. a. What is the break-even point in bags? b. Calculate the profit or loss on 12,000 bags ...

math
express the repeating decimal 10.232323 as a ratio of two integers

microeconimics
A. Savings on the grocery item: 40% On the laptop: 2.5% B. In absolute terms Savings on grocery items: \$4 On the laptop: \$10 C. If Samir is willing to sacrifice 20 minutes of his time to save \$4 in one case, shouldn't he also be willing to sacrifice 20 minutes of his time ...

statistics
Go to a local library; collect a sample of books consisting of the ages of book (based on copyright dates). Plan and describe the sampling procedure, then use the results to construct a confidence interval estimate of the mean age of all books in the library. Please, post and ...

Physics
A box is sliding down an incline tilted at an angle of 2.14° above horizontal. The box is sliding down the incline at a speed of 5.15 m/s. The coefficient of kinetic friction between the box and the incline is 0.387. How far does the box slide down the incline before ...

chemistry
how many grams of cacl2 are needed to prepare 6.00L of a 0.400M CaCl2 solution

That was uncalled for sue and that's why I don't like for my children to ask teachers questions and that's why I have started homeschooling my children because of the abuse in the school not only verbal but physical that my children have dealt with just from the ...

physics
A resistor is connected inseries

Physics
KE= 1/2 mv^2 = 1/2 (0.070 kg) v^2 ; Ft= mv v= Ft/m v=(152N)(0.030s)/0.070kg V= 65 m/s = 1/2 ((0.070 kg) (65 m/s) ^2 = 148.5 J

Chemistry 1002
Over a period of time, the concentration of sulfuric acid in a lead storage battery of an automobile has decreased from 38 percent by mass(density=1.29 g/mL) to 26 percent by mass(1.19 g/mL). Assume the volume of the acid remains constant at 715 mL. a)Calculate the total ...

Math
24

Math
Chad buys peanuts into pound bags Siri packages them into bags that hold 56 pounds of peanuts how many 2 pound bags of peanuts should Chad by so that he can fill the 56 pound bags without having anything that's left over

Math
Suppose the speedometer of your car reads 90 km/ hr. If you are driving in the united states where the maximum speed is posted as 50 mi/ hr By how much are you exceeding the speed limit.

Math
Can someone do out the calculations for me on 7 yds , 1 ft,- 3 yds, 2 ft,= what in ft . Thanks

Math
The figure below represents a garden in which a flower bed ( inner rectangle) is to be installed. The garden ( excluding the flower bed) is to be sodded. The outer is 9' ft width and 15' ft long and the inner is 3'ft wide and 7'ft long. A) Find the area of the ...

English/grammar
Is this better Writeacher? Shortly after moving to the Wisconsin, Molly began attending Second Baptist Church. During service one day, she said she was approached by a longtime parishioner named Cynthia Givens, who was aware of Molly's unstable living condition. Cynthia ...

English/grammar
Can someone proofread my English paragraph for grammar? I'd really appreciate it. Give me advice/tips on how to make it better Shortly after her moving to the Wisconsin, Molly began attending Second Baptist Church, where during service one day, she said she was approached ...

Latin I
I need help translating it

Latin I
“Arms and the man I sing”—With these words Virgil began his poem about the origins of the Rome. The “wars” were not only the famous Trojan War, but also the wars in Italy; “the hero” is Aeneas, who traveled from Troy to a new town, New Troy, ...

math
A handful of paper clips is 5.2 grams. A handful of push pins is 500 centigram a. Which handful weighs more? So 1c equals .o1 grams so isn't it 5.2 g compared to .05 grams which then means the paper clips are heavier? Thx for any help you can provide.

Math
Trying to find the rule & equation for the function table. x= 1, 2, 3, 5, 10, 12 y= 9, 13, 17, 25, 45, 53

Finance
• A. Calculate Allied’s cost of debt. (4 marks) The cost of debt is the YTM of the bonds, so: P0: \$950 = \$80(PVIFAR%,9) + \$1,000(PVIFR%,9) PMT: 80 PV: 950 FV: 1000 N: 9 I: YTM = [80 + (1000 – 950) / 9] / 1000 + 950/ 2 R = 85.56 / 975 = 0.0877 or 8.78% FC = 8.82...

ENGLISH
That works, but I am going to continue to play around with it a bit. I appreciate you're help Writeacher. You've been very helpful, thank you!

ENGLISH
trying to paraphrase what they said

ENGLISH
her daily routine after work consisted of grading papers and watching TV so she was looking for ways to spend her time more "productively" after work and decided volunteering would be the best approach. I'm trying to think of a good sentence for all this information

ENGLISH
Does this sentence make sense? For Amber volunteering instilled the desire to use her time more productively and simultaneously make a difference in the community.

Calculus
If two resistors with resistances R1 and R2 are connected in parallel, as in the figure, then the total resistance R, measured in Ohms (Ω), is given by: 1/R=1/R1+1/R2 If R1 and R2 are increasing at rates of .3Ω/s and .2Ω/s, respectively, how fast is R increasing...

Calculus
1 pt) For positive constants k and g, the velocity, v, of a particle of mass m at time t is given by v=mg/k(1−e−kt/m). At what rate is the velocity is changing at time 0? At t=8? What do your answers tell you about the motion? At what rate is the velocity changing ...

geometry
An obtuse isosceles triangle has one angle with a measure of (2x) degrees and another angle (5x) degress. What is the measure of the third angle of the triangle?

English
How can I make this sentence better? or is it ok? The group offers organizations and companies access to their network of volunteers, resources to create any community-focused promotional event, and cause marketing strategies.

Chemistry 1002
Calculate the standard entropy change for the following reaction at 25 °C. 2 Al (s) + 3 ZnO (s) --> Al2O3 (s) + Zn (s) answer is in J/K mol