Wednesday

July 29, 2015

July 29, 2015

Total # Posts: 803

**Physics 3**

9x^2y-7,3x^3
*October 20, 2011*

**physics **

A 23- bullet traveling 230 penetrates a 3.6 block of wood and emerges cleanly at 170 . If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges?
*October 14, 2011*

**math**

Urn I and urn II each have two red chips and two white chips. Two chips are drawn simultaneously form each urn. Let X1 be the number of red chips in the first sample and X2 the number of red chips in the second sample. Find the pdf of X1+X2.
*October 9, 2011*

**physics**

A man walks 15m north then 20m at 32° E of N and then 11 m at at 15° S of W determine his net displacement
*September 28, 2011*

**physics**

A man walks 15m north then 20m at 32° E of N and then 11 m at at 15° S of W determine his net displacement
*September 28, 2011*

**ALGEBRA2**

HAS THE CONTENT in this course allowed you to think of math as a useful tool? if so how? what concepts investigated in this course can apply to your personal and professional life? in what ways did you use my mathlab for extra support?
*September 25, 2011*

**English**

to settle an argument.. is it correct to hyphenate She will be placed into a short-leg walking cast? I say yes! Thank you !
*September 22, 2011*

**English**

Similarly, on the left ear, the eardrum, itself, did not appear infected and we simply talked about watching the number of infections that pop up this winter, as well as our potential need to replace tubes, if the infections become too bothersome or frequent. I cannot change ...
*September 21, 2011*

**English**

I have asked her family to let me discuss this with our cochlear implant team to see if this would be a reasonable option from their perspective. Is cochlear implant team capitalized?
*September 21, 2011*

**English**

She does need preferential seating in the front of her classes, which she is not getting in history currently. Is "history" capitalized in this sentence.
*September 21, 2011*

**Geometry**

Referring to the figure below (not to scale), the perimeter of the rectangle is 48. The length of the rectangle is W + 6, where W is the width. Find the length.
*September 14, 2011*

**science**

talking on your cell pohon e in your beddroom, when suddenly the reception goes bad for a minute
*September 13, 2011*

**physics**

displacement for walking 100m east than 125m west
*September 3, 2011*

**Accounting**

March 3 Inventory units 60 per unit $1,500 total $90,000 March 8 Purchase 120 units $1,800 per unit total $216,000 March 11 Sal units 80 per units $5,000 total $400,000
*August 28, 2011*

**trig**

If a, b are the solutions of the equation log base 3 (5-2x)+ log base 3 (5+2x)=2 find the value of the product ab.
*August 26, 2011*

**trig**

find the value of x when: x= 5 log base 2 (1/16)+ 8 log base 3 (27)
*August 26, 2011*

**Oceanography**

How much heat must be added to turn 3 grams of water at 100°C into a vapor and what will be the final temperature after this much heat is added
*July 7, 2011*

**physics**

A child is pushing a shopping cart at a speed of 1.5 m/s. How long will it take this child to push the cart down an aisle with a length of 9.3 m?
*June 29, 2011*

**science**

How is potiential evaporation measured?
*June 27, 2011*

**physical science**

A rocket blasts off. In 10.0 seconds it is at 10,000 ft, traveling at 3600 mph. Assuming the direction is up, calculate the acceleration. 5280 ft/sec2 528 ft/sec2 100 ft/sec2 100. ft/sec2
*June 27, 2011*

**physical science**

A rock tied to a string is swung around in a circle at a constant speed of 25 ft/sec. The length of the string is 1.765 ft. Calculate the acceleration. = _____ . 354.1 ft/sec2 350 ft/sec2 14.16 ft/sec2 14 ft/sec2
*June 27, 2011*

**physical science**

A weight attached to a wire is swung in a circular path. Its speed is 12 meters/sec, and it has a centripetal acceleration of 9.0 meters/sec2. Calculate the diameter of the circle. 1.3 meters 2.6 meters 16 meters 32 meters
*June 27, 2011*

**physical science**

While traveling south on an expressway, a car traveling 60 mph (miles per hour) slows down to 30 mph in 12 minutes due to traffic conditions. Calculate the acceleration. = -2.5-6.0-150-450 mi./hr2 NSWEn/a
*June 27, 2011*

**physical science**

If a car goes along a straight road heading east and speeds up from 45 ft/sec to 60. ft/sec in 5 sec, calculate the acceleration. = Note: If the speed were given in miles per hour, and the time were given in minutes, you could change the minutes to a fraction of an hour and do...
*June 27, 2011*

**physical science**

If a car goes along a straight road heading east and speeds up from 45 ft/sec to 60. ft/sec in 5 sec, calculate the acceleration. = 3-3 ft/sec 2 NESn/aW Note: If the speed were given in miles per hour, and the time were given in minutes, you could change the minutes to a ...
*June 27, 2011*

**physical science**

A rock tied to a string is swung around in a circle with a radius of 10 ft. The centripetal acceleration is 16.9 ft/sec2. Calculate the speed of the rock.
*June 27, 2011*

**physical science**

A car slams on its brakes, coming to a complete stop in 4.0 sec. The car was traveling north at 60.0 mph. Calculate the acceleration.
*June 27, 2011*

**physical science**

A car goes around a curve (the arc is part of a circle with a radius of 25 ft.) with a speed of 20.0 ft/sec. What is the magnitude of acceleration?
*June 27, 2011*

**physic**

How do you find the average speed?
*June 23, 2011*

**Physics**

Calculate the work done by non conservative forces of a hockey stick hitting a tennis ball using elastic potential energy, and kinetic energy if the mass of the ball is 0.058kg and the ball is shot at 34m/s for .41s and travels 5.09m, and the hockey stick bends 0.10m.
*June 13, 2011*

**Ethics **

I am so tired of seemingly educated students not knowing how to form complete sentences or spell. If you really want to make an impression, or even get anyone to read the posts, take the time to act like someone who's opinion is something we want to consider. In other ...
*June 10, 2011*

**Geometry**

Thanks
*June 6, 2011*

**Geometry**

A 4-in. by 6-in. drawing is enlarged to put on a poster that measures 20 in. by 24 in. What are the dimensions of the largest possible enlargement?
*June 6, 2011*

**world geography **

007690RR, 007691, 007692, 007693 pls help me. penn foster exam for world geography.
*June 5, 2011*

**world issuse**

Passage
*May 24, 2011*

**Alkaline Dry Cell**

I need to be able to label all parts of battery
*May 22, 2011*

**trig**

In triangle XYZ, angle X = 90°, angle Y = 38°, and z = 4'5". Find y
*May 20, 2011*

**chem**

You have a series of four chemical reactions (1 2 3 4). How do you calculate the H2 if you know the other H values?
*May 17, 2011*

**chem**

Two hundred grams of a substance requires 0.52 kJ of heat to raise its temperature from 25°C to 45°C. q = mCT. Mass (m) is in grams. Temperature is in degrees Celsius.
*May 17, 2011*

**Chem**

What is the change in enthalpy when 250 g of steam condenses at 100oC? (Hv = 40.67 kJ/mol)
*May 17, 2011*

**chemistry**

calculate the mass, in grams, of NaCl present in each of the following solutions. 6.25 g of 11.5% NaCl solution 452 g of 12.3% NaCl solution please show me how to do these. Thanks.
*April 29, 2011*

**chemistry**

how does an ionic solute dissolve in water?
*April 27, 2011*

**chemistry**

It was that easy. I think I was trying to make it harder than it was. Thanks for the help
*April 17, 2011*

**chemistry**

A hexane solution contains as impurities 5.2% (by mass) hepatne and 2.9% (by mass) pentane. Calculate the mass of each component present in 93g of the solution.
*April 17, 2011*

**world history**

How total was the transformation brought about by the industrial revolution?
*April 17, 2011*

**math**

assume that the edge of a square is 1 unit add squares to this shape so that it has a perimeter of 18
*April 6, 2011*

**geometry**

Find the area of a pentagon ABCDE with verticles A(0,4),B(3,2),C(3,-1), D(-3,-1) and E (-3,2)
*April 6, 2011*

**geometry**

Find the area of a pentagon ABCDE with verticles A(0,4),B(3,2),C(3,-1), D(-3,-1) and E (-3,2)
*April 6, 2011*

**Chemistry**

what role does barometric pressure play in the boiling point of water?
*April 3, 2011*

**stressed and unstressed syllables**

how do you know a stressed or unstressed syllable
*March 28, 2011*

**math**

For the set X={m,n.p,q,r,s}, let R be the relation on P(X) (power set) given by A R B iff A and B have the same number of elements. List all the elements in {m}/R (equivalence class); in {m,n,p,q,r,s}/R. How many elements are in X/R? How many elements are in P(X)/R?
*March 27, 2011*

**math**

define the concept of sampling error
*March 27, 2011*

**health**

What would be the risk od a young healthy person choosing a managed care plan,
*March 25, 2011*

**Chemistry**

N2O4(g) 2 NO2(g) The ΔH° for the reaction above is +57.2 kJ. The system is initially at equilibrium. Which of the following changes will favor the reverse reaction? NO2 is removed. N2O4 is removed. A catalyst is added. The temperature is increased. The temperature is ...
*March 12, 2011*

**5th grade math**

I need help with this problem ! 5 2/5 - 3 4/5= ? 6 1/10 - 3 4/10 = 10 - 4 2/5= ? PLEASE! SHOW ME EACH PROBLEM STEP BY STEP SO , I CAN FINISH MY HOMEWORK! THANK YOU!
*March 3, 2011*

**math**

Use the Generalized PMI to prove: 2^n > n^2, for all n > 4 First of all, it's true for n=5. Then to prove it for n+1... Assume 2^n > n^2. Then 2^(n+1) = 2*2^n > 2*n^2 > 2*(4n) since n>4 => n^2>4n I'm stuck there.
*March 3, 2011*

**math 4th grade**

each student brought in 9 cans to recycle. write an equation to represent the total number of cans (c)for any number of students(s)
*February 24, 2011*

**society**

two ways American institutions have brought oppressed groups closer to the American dream
*February 23, 2011*

**english 101**

how do you plan to support this thesis on healthy eating
*February 21, 2011*

**education**

how do you implement your educational philosophy in the classroom and what educational theories would be at work.
*February 20, 2011*

**math**

Prove that if x ∉ B and A ⊆ B, then x ∉ A.
*February 19, 2011*

**algebra**

factor 1 36x^12 40x^8
*February 17, 2011*

**algebra**

multiply and simplify 5a^7. 6q^5 4q^2 25a
*February 17, 2011*

**english 101**

Identify the topic and three subtopics for healthy eating
*February 14, 2011*

**english 101**

i need help on healthy eating what 3 credible sources from the internet
*February 14, 2011*

**Immediate accounting**

make a journal entry received cash for 1600 frome customer for rent from dec 2009 thru mar 2010 I have more room than I need so i rented out the area
*February 12, 2011*

**5th grade math**

Which answer shows data with a range of 49? A. 45,69,92,59 B. 95,59,52,89 C.99,66,51,52 D.55,99,78,50 if you select one of the answer .How do you solve the problem.? i was wonder how ?please explain your answer please!! so the next problem i try to solve by myself.for me thank...
*February 9, 2011*

**5th grade math**

In 2000 the population of goddard was 5,554. The population of Valley Center was 7,323. What is the Approximate difference between the populations, to the nearest one hundred people. please! help I'm totaly confuse with this question?? do you substract it?
*February 9, 2011*

**Chemistry**

Which of the following can be amphoteric? A) Cl¯ B) H3O+ C) HPO4¯ D) PO4¯³ E) HCl
*February 8, 2011*

**college algebra**

GCF -x^7,-7x^3,-35x^6
*February 5, 2011*

**college algebra**

factor by grouping 6x^3-6x^2-x+1
*February 5, 2011*

**algebra-college**

(-5x^2)2
*February 5, 2011*

**5th math **

can you show how to do the median ? what is the median for the following numbers? 142,83,65,178,14,78. i think 83 is the answer. 36/16=B THE ANSWER FOR EXPRESSION FOR .36 STUDENTS 36/16=20 BOYS THE ANSWER
*January 31, 2011*

**5th math **

what is the least common multiple (LCM)for 15 and 45? There are 16 girls in a class of 36 student. which expression could be used to determine the number of boys (b) in the class? please! help i think this too hard for 5th grade math. this suppose to be for 10th or college ...
*January 31, 2011*

**5th grade math**

i need help with fraction 3/5-3/15= ? PLEASE SHOW ME HOW TO DO THIS PROBLEM,THANKS!!
*January 27, 2011*

**5th math**

how do you divide 302 by 33,593? how do you divide 67 by 48,384? show me step by step pleae! if you can?
*January 27, 2011*

**5th math**

Mr. davison has 30 students in his class . He has four more girls than boys. How many boys are in Mr. Davision class? can you please check my answer? I got 11 boys . does it sound about right ?
*January 27, 2011*

**5th math**

what is the average number of hot dogs sold? 12,12,13,17,21,22,22,22,22,30,32,37. please! show me this how to solve this problem? my last question for today.thank you very much without your help . it;s impossible to understand this problem.
*January 27, 2011*

**5th grade**

The Chang Toy Factory in China can produce 35 mini toy care each minutes at a cost of 77 cents. then, a package of 35 is put in a cardboard box that holds 350. What does it cost to procuces 285 toy cars? can you show me how to solve this problem .? do you divide or X it?
*January 26, 2011*

**5th math**

What is the measure of each side of a square with a perimeter of 60 inches? this one I'm total lost . please ! show me how you do this problem. thank you!!
*January 26, 2011*

**5th math**

look at the number of leters robin sorted at her job at the post office. what is the mean number of letters sorted? day------letters sat. 105 Mon. 97 Tues. 88 Wed. 86 please! show me how to do this problem.thanks!!
*January 26, 2011*

**5th math **

Jackie ran 4 Miles in 28.5 minutes Which equation could be used to determine the average number of minutes it took jackie to run Each mile(k)? k-4=28.5 or k+3=28.5 or k/3=28.5 or 4k=28.5 can you tell me which one is the right equation?
*January 26, 2011*

**5th grade health class**

How is a privilege different from a right? please! wxplain words to me so, i can have a better understaning on it. thank you!
*January 25, 2011*

**Eng. Dynamics**

A fire fighter is standing 20 m from a burning building as shown. She is holding a fire hose 1 m from the ground directed upward at 60° from horizontal with water coming out of the nozzle at 20 m/s. Find the distance from the edge of the roof to where the water is landing.
*January 23, 2011*

**5th grade**

just one more problem i'm still struggle with . Find the median and mean for each set of numbers. 17,13,27,33,25. please! give me an example again. thank you!!
*January 20, 2011*

**5th grade **

what is the mode for the following numbers? 900,700,500,600,600,300,600,200,100,300,200. please! show me how to do this problem? than you!
*January 20, 2011*

**algebra**

Use the formula y-y sub 1 (10)=m slope 2 times x- x sub 1 (1) y-10=2(x-1) y-10=2x-2 y=2x+8
*January 20, 2011*

**ststistics**

thank you i solved it myself
*January 20, 2011*

**ststistics**

each tire of an 18 wheeler has a probability of 5% TO maintain on a 10000 mile trip. WhAt is the probability that no more than 3 tires need maintenance during this trip. How do i do this?
*January 20, 2011*

**5th grade math**

a new fence is needed for the perimeter of a rectangular horse pasture. The pasture measures 78 feet by 68 feet. how many feet of fencing are needed for the pasture? CAN YOU SHOW TO WORK THIS PROBLEM>?
*January 19, 2011*

**5th grade math**

a new fence is needed for the perimeter of a rectanglar horse pasture. the oastyre measure 78 feet by 68 feet. How many feet of fencing are needed for the pasture?
*January 19, 2011*

**5th grade math**

what is the range for the following number? 900,700,500,600,600,300,600,200,100,200? pleASE! EXPLAIN HOW TO SOLVE THE PROBLEM..
*January 19, 2011*

**5th math**

charlene's scores: 80,80,70,65,60,80,60,80,80. median______________ mean_____________? Kiyda's scores:75,80,95,80,100,80,95,100,80. median______________ mean_____________? can you explain this problem to me thanks!!
*January 18, 2011*

**5th math**

what you mean by 4ft=it's 48 in that not my question . i want to know how to do the other problem as well on the meant for the following number? 33,41,37,27,32,?
*January 18, 2011*

**5th math**

4 ft=?in
*January 18, 2011*

**5th math**

what ist he mean for the following nubers? 33,41,37,27,32. can you please explain the problem to me..?? what ist he least common Multiple(LCM) for 6,4,and 8?
*January 18, 2011*

**math**

slope=3/2 y intercept=0
*January 17, 2011*

**algebra**

polynomial with h+vt-4.9^2 50 meters high 30 meters per sec. what is height after 2 sec.
*January 15, 2011*

**Science**

why is it necessary for water, carbon, nitrogen and oxygen to be recycled through the earth's ecosystem?
*January 15, 2011*