Friday
August 22, 2014

Posts by josh


Total # Posts: 1,457

physics
what is your final velocity after 680 meters if you start out at 90km/hr and acceleration is 9 m/s
December 7, 2011

geometry
The scale drawing for a business office is drawn so that 1 cm = 2 ft. If the length of the model is 4 cm and the width is 9 cm, what is the actual area of the business office?
December 6, 2011

Physics
What is the acceleration of a proton in an electric field of 10^6 N/C?
December 6, 2011

Physics
What is the acceleration of a proton in an electric field of 10^6 N/C?
December 6, 2011

phi 103
Which of the following may not qualify as a falsifiable claim?
December 4, 2011

spanish
OHHHH I got it! Where does one go when one wants to shop at many different types of stores? Sometimes I'm such a simpleton.
December 2, 2011

spanish
I'm having problem here with number 5. Vamos al ______ could be any number of things... I would assume it's 'shopping' but that isn't accepted...
December 2, 2011

physics
A convex mirror has a focal length of 15 cm. A 3.0 cm high object is located 10 cm in front of this mirror. Where is the image located?
December 2, 2011

physics
A 5 meter diameter telescope is used to observe binary star systems. What is the minimum separation distance (perpendicular to the line of sight) for which the two stars can be resolved if they are at a distance of 1,000 light years = 10 m and they are observed in visible ...
December 2, 2011

physics
Light shines through a single slit whose width is 1.12 mm. A diffraction pattern is formed on a screen located 4.0 m away. The distance between the middle central bright fringe and the second dark fringe is 4.0 mm. What is the wavelength of the light?
December 2, 2011

physics
A light ray travels from water to air. If the ray strikes the water/air boundary at an angle of incidence of 46 degrees, what is the angle of refractiob in air? (n water = 1.33)
December 2, 2011

Physics
a 59kg student jumped off the back of a 42kg sailboat, the boat was already travelling at 3.1m/s before she jumped. if she jumpped off with a speed of 2 m/s, how fast was the boat moving? thanks for any help
December 1, 2011

Science
Are sunspots cooler or hotter spots in our sun? I think it's cooler
December 1, 2011

Science
What causes day and night? What's the difference between a solar eclipse and a lunar eclipse?
December 1, 2011

Science
How does Earth have seasons?
December 1, 2011

Government
blah
November 29, 2011

calculus
A growing boy who is 4 feet tall stands 8 feet from a 12 foot lamp post. The boy is growing at the rate of 3/4 inches per year. How fast is his shadow growing (in inches per year)?
November 25, 2011

physics
You need to move a 135-kg sofa to a different location in the room. It takes a force of 92 N to start it moving. What is the coefficient of static friction between the sofa and the carpet?
November 23, 2011

MATH
So none of these are correct? 2/3 divided 3/5 = 1 1/9 or 2/5?
November 22, 2011

Math
can you please let me know if these are correct: 1. 5 5/6 x 2 4/5 = 16 2. 2/3 divided 3/5 = 1 1/9 or 2/5? 3. 7/12 divided 2/3 = 7/8 4. 3 1/2 divided 3/4 = 4 2/3 or 2 5/7 5. 4 2/3 divided 7 = 2/3 6. 4 1/5 divided 1 2/5 = 3 7. 2/5 x 5/14 = 1//7 8. 2/3 + 1/7 = 17/21 OR 12/21
November 22, 2011

Pre Calculus
find all solutions of the equation 1. x^3+27=0 2. x^3-8=0
November 21, 2011

Pre Calculus
1. Find all rational zeros of the polynomial. Then determine any irrational zeros, and factor the polynomial completely. 3x^4-11x^3+5x^2+3x 2. Find the polynomial with leading coefficient 1 that has a degree of 4, a zero of multiplicity 2 at x=1 and a zero at x=2+i
November 21, 2011

Biology 11
the genotype of the hybrids of two pure-breeding pea plants that each have white flowers and round seeds (both traits dominant) would be?
November 20, 2011

Pre Calculus
Find a third degree polynomial P(x) that has zeros at x=-1, x=1, x=2 and whose x-term has coefficient 3?
November 20, 2011

Chemistry
A typical buffer used by biochemists is called Tris, which can be depicted as R3N. A buffer that is prepared by mixing 500ml of .05M R3N with 500ml of .05MR3NHCl at 25 C has a pH of 8.40. If this same buffer is placed in a cold room at 4 C the pH increases to 9.2. From this ...
November 17, 2011

social studies
What did the people of ancient Ghana have that the proto-Bantu-speaking people did not? What effects do you think this had on their descendants?
November 16, 2011

Physics
a) Find the acceleration of the block if the incline is frictionless. b)Find the acceleration of the block if the coefficient of kinetic friction between the block and incline is 0.12.
November 16, 2011

Physics
A block of mass m = 5.2 kg is pulled up a è = 24° incline as in the figure with a force of magnitude F = 34 N.
November 16, 2011

MATH
Please help me with these: 1. 5/8 + 5/6 = 2. 2 3/5 + 4 4/5 = 3. 13 1/2 + 7 2/3 = 4. 3/8 - 3/8 = Thanks!
November 15, 2011

MATH
Please help me with these: 1. 5/8 + 5/6 = 2. 2 3/5 + 4 4/5 = 3. 13 1/2 + 7 2/3 = 4. 3/8 - 3/8 = Thanks!
November 15, 2011

English
Are there any tutors on here that are familiar with The Canterbury Tales?
November 13, 2011

spanish
is this past or present tense Mi Papa escribio un cheque
November 10, 2011

Math - Calculus III
Find the double integral of f (x, y) = (x^7)y over the region between the curves y = x^2 and y = x(3 - x).
November 8, 2011

Math
Find the double integral of f (x, y) = (x^7)y over the region between the curves y = x^2 and y = x(3 - x).
November 8, 2011

political science
In need of help on my political science homework please help with these questions Only these questions left! One reason why the US has only 2 major parties is that it has: A. insufficient opportunities to bribe candidates B. too much involvement by religious groups C.single-...
November 6, 2011

Chemistry! HELP;
An atom of potassium (K) has 19 protons: 18 electrons in its inner electron energy levels and 1 electron in its outer energy level. What is the easiest way for this atom to get a filled outer energy level? What is formed?
November 6, 2011

algebra
can you please help me with these 1. -5/c = 1/3 2. k/8 = -2/5 3. 6/z = -3/5
November 1, 2011

math
Please help me with these 1. -5/c = 1/3 2. k/8 = -2/5 3. 6/z = -3/5 Thank you
November 1, 2011

Botany
During the last part of cellular respiration in the mitochondrion, electron flow is tapped and used to make ATP. Where do the electrons end up when they are finished flowing?
October 31, 2011

Math
Find the general solution of the equations csc^2 θ =4/3.
October 30, 2011

Pre Calculus
using the factor theorem to show that x-c is a factor of P(X) for the given values of c, and factor 1. P(x)=x3-5x^2+8x-4; c=1
October 29, 2011

Pre Calculus
Exponential growth and decay find the half life of a radioactive substance if 220 grams of the substance decays to 200 grams in 4 years?
October 25, 2011

CHEMISTRY PLEASE HELP
a) How will the concentration of NaOH be affected if during the titration some of the solid potassium hydrogen phthalate was spilled during the transfer? Will the concentration of the standardized NaOH increase, decrease, or have no effect? b) How will the molar mass of an ...
October 24, 2011

CHEMISTRY PLEASE HELP
Using the data collected for part b on your data sheet, calculate the molar mass of the unknown acid. Include the calculation for each trial and the average. Trial One Results: Mass unknown acid: 0.500g Final buret reading: 18.01mL Initial buret reading: 0.11mL Volume NaOh ...
October 24, 2011

CHEMISTRY PLEASE HELP
Using the data collected for part c on your data sheet and assuming the density of the vinegar is 1.00g/mL, 1) calculate the molar concentration of acetic acid (CH3COOH) in the vinegar sample using the average volume of NaOH. 2) calculate the mass percent of acetic acid in the...
October 24, 2011

Chemistry
Using the data collected for part c on your data sheet and assuming the density of the vinegar is 1.00g/mL, 1) calculate the molar concentration of acetic acid (CH3COOH) in the vinegar sample using the average volume of NaOH. 2) calculate the mass percent of acetic acid in the...
October 24, 2011

Chemistry
Using the data collected for part b on your data sheet, calculate the molar mass of the unknown acid. Include the calculation for each trial and the average. Trial One Results: Mass unknown acid: 0.500g Final buret reading: 18.01mL Initial buret reading: 0.11mL Volume NaOh ...
October 24, 2011

Chemistry
a) How will the concentration of NaOH be affected if during the titration some of the solid potassium hydrogen phthalate was spilled during the transfer? Will the concentration of the standardized NaOH increase, decrease, or have no effect? b) How will the molar mass of an ...
October 24, 2011

statistics
government data assign a single case or each death that occurs in the u.s. the data show that the probability is 0.45 that a randomly chosen death was due to cardiovascular disease, and 0.22 that i was due to cancer. Suppose a docote checked the cause of death of 2 randomly ...
October 24, 2011

Pre Calculus
Inverse functions what is the inverse function of f(x)=1/square root of x +1? and f(x)=1-x^2, x<0?
October 23, 2011

Pre Calculus
Exponential and log functions What initial investment at 8.5% compounded continuously for 7 years will accumulate to 50,000?
October 23, 2011

Pre Calculus
Inverse functions find the value If f(x)=1/x, find f^-1 (2)
October 22, 2011

Pre Calculus
Exponential Growth and Decay Find the half-life of a radioactive substance that decays by 5% in 9 years.
October 22, 2011

Pre Calculus
Logarithms Solve the equation for x 1-ln(3x+2)=0
October 21, 2011

Pre Calculus
Applications of trigonometric functions Solve the missing parts of the triangle satisfying a=125 b=150 alpha=55 degrees There are two solutions
October 14, 2011

Math
I have input x (20,1,40,4,8,10) and output y (2,40,1,10,5,4). What is the function?
October 13, 2011

Calculus
Using Law of Sines: Need Help 1. alpha=70 Degrees Beta=38 Degrees a=35
October 13, 2011

math
58 cm times 55.6. try to find the area for this problem
October 11, 2011

Physics
Two blocks are at rest on a frictionless, 20 degree incline. What are the tensions in the two strings if block 1= 5.3kg and block 2= 2.4kg?
October 10, 2011

Physics
Each of 108 identical blocks sitting on a frictionless surface is connected to the next block by a massless string. The first block is pulled with a force of 108N. What is the tension in the string connecting block 108 to block 107?
October 10, 2011

Physics
Each of 108 identical blocks sitting on a frictionless surface is connected to the next block by a massless string. The first block is pulled with a force of 108N. What is the tension in the string connecting block 108 to block 107?
October 10, 2011

algebra
I NEED HELP SOLVING THIS PROBLEM WX/P + P/X = PLEASE EXPLAIN AND SHOW HOW TO SOLVE W = 3.5, X = .4, P = 2.6
October 10, 2011

Calculus
solve this equation on the given interval expressing the solution for x in terms of inverse trigonometric functions. 6(cosx)^2-cosx-5=0 on (pie/2, pie)
October 10, 2011

physics
Each of 108 identical blocks sitting on a frictionless surface is connected to the next block by a massless string. The first block is pulled with a force of 108N. Part A. What is the tension in the string connecting block 108 to block 107? Part B. What is the tension in the ...
October 9, 2011

Chem
A lake may be polluted with Pb2+ ions. what precipitation reaction might you use to test for the presense of Pb2+?
October 9, 2011

Physics
An ice sled powered by a rocket engine starts from rest on a large frozen lake and accelerates at 15.0 m/s 2 . At t1 the rocket engine is shut down and the sled moves with constant velocity v for another t2 s. The total distance traveled by the sled is 5.60 × 10 3 m and ...
October 6, 2011

trig
5 and 6
October 5, 2011

math
write the unit rate of2 into 50
October 3, 2011

math
type 8580 words in 2hrs and 45mins
October 3, 2011

math
Fator the trinomial: 4) 2 p + 10p +25 6) 2 y - 5y -24 8) 2 n + 2n -48 10) 2 y + 17y + 72 = 0 12) 2 w - 13w + 42 = 0
September 28, 2011

Spanish SRAJMcGIn please recheck
Please recheck my above posting-thank you
September 28, 2011

Spanish -another question
I'm sorry but I don't understand about #5-I should have written it as I could almost reach it so it would be Prefiero esa sepiete. Is that correct? Were the others correct I guess my closest is this/these My far away is you can almost reach them and my fathest would be...
September 28, 2011

Spanish -another question
Correction-Number 5 should be Prefiero esa serpiente. Correct because its feminine?
September 28, 2011

Spanish -another question
I'm working on distances like saying something is closest far away or furthest. Are these correct for what I put in English as the closest far away or furthest- 1.furthest away- Preferiero aquella arana.(accent over n) 2.far away-Prefiero esa gallina. 3. far away-Prefiero ...
September 28, 2011

Spanish
Thanks-appreciate it
September 28, 2011

Spanish
Change the verb in each sentence to the present participle. 1.Tú nadas. Tú estás nadando. 2. Él bebe café. Él está bebiendo café.
September 28, 2011

Science
8===))
September 20, 2011

Physics
A car is traveling 28 m/s when the driver sees a child standing on the road. He takes 0.8 s to react, then steps on the brakes and slows at 7.0 m/s2. How far does the car go before it stops?
September 19, 2011

Math
50
September 19, 2011

Pre-Calc
That is so easy-I can't believe I was screwing it up so badly-Thank you
September 18, 2011

Pre-Calc
Please help me with this problem-I'm stuck (x-2)/(x+2) = (x+10)/x I'm not even sure where to start-Thanks for any help you can provide
September 18, 2011

Trigonometry
Solve. 2sin(2ƒÆ) + ã3 = 0 interval [0, 2ƒÎ) How do I start this? I feel like maybe Trig Identities, but I'm not really sure.
September 16, 2011

Math trig.
find the length of the arc intercepted by a central angle of 35 degree 28' in a circle of radius 15ft....i cant figure out how to get it ??
September 15, 2011

math
HOW TO SIMPLIFY 7 6/24?
September 14, 2011

physics
A small rock is thrown vertically upward with a speed of 13.0 from the edge of the roof of a 31.0 tall building. The rock doesn't hit the building on its way back down and lands in the street below. Air resistance can be neglected What is the speed of the rock just before ...
September 13, 2011

Government
The Principle of self-government emphasizes majority rule whereas the principle of liberty emphasizes individual rights. There principles A. are universal and are the foundation of all legitimate governments. B. have no real meaning in practice. C. have the same meaning for ...
September 11, 2011

Math
Evaluate if r=-8: |-15-r|+|r|=
September 9, 2011

chemistry
1.1
September 5, 2011

algebra
Factor: A.) 2x^2-9x-18 B.) 14x^2-55x-36 C.) x^3+3x^2-x-3
September 3, 2011

physics
A student uses a sonic motion detector to determine the position of a car at various times. The student takes five positions at five different times. The student's data is represented below: Time t [s] Position x [m] 0.5 39.9 1.4 75.4 2.9 139.3 3.7 186.5 4.1 193.2 (a) Plot...
August 30, 2011

physics
An object moves to the right according to the equation x = 4t2 + 3t + 16 where x is in meters and t is in seconds. Determine the object's average velocity between time t = 0 and time t = 4 seconds.
August 30, 2011

science
1. what weight in grams of magnesium oxide will produce from burning 96 grams of magnesium? 2. a solution containing 252g of calcium sulfate will produce from 165lbs of phosphate rocks containing 82.5 % pure calcium phosphate treated with sulfuric acid? 3. how many tons of ...
August 28, 2011

Calculus
find tha value of f(x)=x3 where f(x+h)-f(x)/h so far I got 3x2+3hx+h2/h and got stuck from here.
August 27, 2011

science
1. What weight of aluminum may be obtain from 1 kg of aluminum oxide? 2. how many liters of hydrogen would be form by the reaction of 25g of hydrochloric acid and sufficient quantity of zinc? 3. 0.82l of an unknown gas at 35 degree Celsius and 80 cm-Hg weigh 2.46g. compute for...
August 27, 2011

Calculus
I am having trouble with these 2 problems. Evaluate: (1/x^9)dx Evaluate: (5x^5-4x^3+6x)dx
August 26, 2011

Calculus
Sorry, I typed wrong. The equation is (3x^4-2x^3+7x)/x^4+14x-2
August 26, 2011

geometry
find the value of b if jm = b and ml = 3b-4
August 24, 2011

statistics
A researcher is interested in studying people’s mean age in a certain region. If the population standard deviation is known to be 8 years and 1.5 year of error margin is allowed, find the minimum simple size the researcher needs to use, knowing that he is going to conduct...
August 24, 2011

biology
what is the difference between a chemical that is an irritant compared to a chemical that is corrosive?
August 21, 2011

Web Design
how has the internet changed since 1980?
August 19, 2011

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