Friday
July 25, 2014

Posts by bobby


Total # Posts: 568

science
what is a form of energy that is always transferred from a warmer substance to a cooler one?

algebra
A small painting has an area of 400 c m 2 . The length is 4 more than 2 times the width. Find the dimensions of the painting. Solve by completing the square. Round answers to the nearest tenth of a centimeter.

Math
I am very good at maths, I am estimated to get an A+, but I hate turning point questions. How do you find the turning point when given the quadratic function? f(x)=(x+3)^2 - 16 Write down the co-ordinates of the turning point on the grap of y=f(x)

math
what does sin2x/cos2x equal to?

Physics please help ASAP!
If you know the mass of a star and a planet’s radius and speed at perihelion (closest approach to the star), then using conservation of energy and angular momentum you can solve for the radius and speed of that planet at aphelion (farthest point from the star). Encke’...

please help asap!
A ladder, 5.0 m long, leans against a frictionless wall at a point 4.0 m above the ground. A painter is climbing up the ladder. The mass of the ladder is 12.0 kg and the mass of the painter is 60.0 kg. The ladder begins to slip at its base when the painter is 70 % of the way u...

physics please help!!
A diver stands on the end of a diving board as shown in the figure on the right. The mass of the diver is 58 kg and the mass of the uniform diving board is 35 kg. Calculate the magnitudes and directions of the forces exerted on the board at the points A and B. (A & B are 1 met...

Physics
Please help!

Physics
A diver stands on the end of a diving board as shown in the figure on the right. The mass of the diver is 58 kg and the mass of the uniform diving board is 35 kg. Calculate the magnitudes and directions of the forces exerted on the board at the points A and B. A and B are 1m ...

math
xy = 5 a) Identify each relationship as direct or inverse variation. b) Calculate the constant of each relationship and explain how you arrived at your answer. c) Using complete sentences, explain how the two relationships are different, and how they are similar.

Calculus
A ladder 25 feet long that was leaning against a vertical wall begins to slip. Its top slides down the wall while its bottom moves along the lever ground at a constant speed of 4 ft/sec. How fast is the top of the ladder moving when it is 20 feet above the ground?

Science
Classify reaction as addition, displacement, or decomposition: Al(s)+NaOH(aq)=Al(OH)3(s)+Na+(aq)

Physics
An 80 kg hiker climbs a 1000 m high hill at a constant speed. If the hiker's body is 25% efficient, how many kg of fat does the hiker burn in climbing the hill? Given: heat of reaction of body fat is 37000 kilo joules per kilogram. I know that change in potential energy is...

Physics
If you have swam one lap in a swimming pool, that means you have swam from one end to the other and back. In 4.5 h, a swimmer makes exactly 69 laps in a swimming pool that is 35 m long. Determine the distance the swimmer traveled, the total displacement of the swimmer, the swi...

Math
Find an equation for the line that passes through the point (2, -5) and has slope -3

math
PLEASEEE HELPPP Evaluate exact values, if they exist? if any doesn't exist state so. a) (in randians) sin^-1(-1/√2)

economics
The demand curve for knobs is P=75-6QD and the supply curve for knobs is P=35+2QS. What is the equilibrium price of a knob?

math
whats the derivative of lnx?

math
show that the equation x^3-15x+c=0 has at most one root on the interval [-2,2.

biology
An individual with the genetic condition cystic fibrosis has CFTR protein with the amino acid histidine (at position 482), where the normal CFTR protein has arginine. (No other changes are observed in the protein.) This is the result of a _________ mutation. Select one: a. Non...

biology
Which of the following is NOT true of transcription / translation processes in both bacteria and eukaryotes? Select one: a. RNA polymerase reads the template DNA strand to produce the complementary mRNA transcript. b. Translation of a polypeptide can occur before transcription...

biology
Gene expression regulation by methylation of the cytosines in a promoter would be considered : Select one: a. Transcriptional regulation. b. Posttranscriptional regulation. c. Posttranslational regulation. d. Translational regulation.

chemistry
how do u hybridize for sulfate (SO4 -2)?

PHYICS
A person is standing on a level floor. His head, upper torso, arms, and hands together weigh 470 N and have a center of gravity that is 1.13 m above the floor. His upper legs weigh 108 N and have a center of gravity that is 0.755 m above the floor. Finally, his lower legs and ...

Phyics
A 49-N crate is suspended from the left end of a plank. The plank weighs 21 N, but it is not uniform, so its center of gravity does not lie halfway between the two ends. The system is balanced by a support that is 0.30 m from the left end of the plank. How far to the right of ...

Phyics
A uniform board is leaning against a smooth vertical wall. The board is at an angle above the horizontal ground. The coefficient of static friction between the ground and the lower end of the board is 0.710. Find the smallest value for the angle , such that the lower end of th...

chemistry
HELPPPP!!!! A mixture is prepared using equal masses of the two volatile liquids benzene, C6H6, and ethanol, C2H5OH. What is the mole fraction of benzene in this mixture?

phyics
A person who weighs 829 N steps onto a spring scale in the bathroom, and the spring compresses by 0.538 cm. (a) What is the spring constant? (b) What is the weight of another person who compresses the spring by 0.390 cm?

phyics
The figure shows a person whose weight is W = 500 N doing push-ups. Find the normal force exerted by the floor on (a) each hand and (b) each foot, assuming that the person holds this position.

phyics
The figure shows a person whose weight is W = 500 N doing push-ups. Find the normal force exerted by the floor on (a) each hand and (b) each foot, assuming that the person holds this position.

phyics
A person is standing on a level floor. His head, upper torso, arms, and hands together weigh 470 N and have a center of gravity that is 1.13 m above the floor. His upper legs weigh 108 N and have a center of gravity that is 0.755 m above the floor. Finally, his lower legs and ...

phyics
One end of a meter stick is pinned to a table, so the stick can rotate freely in a plane parallel to the tabletop. Two forces, both parallel to the tabletop, are applied to the stick in such a way that the net torque is zero. The first force has a magnitude of 2.00 N and is ap...

phyics
You are installing a new spark plug in your car, and the manual specifies that it be tightened to a torque that has a magnitude of 65 N·m. Using the data in the figure, determine the magnitude F of the force that you must exert on the wrench.

phyics
The steering wheel of a car has a radius of 0.19 m, and the steering wheel of a truck has a radius of 0.26 m. The same force is applied in the same direction to each steering wheel. What is the ratio of the torque produced by this force in the truck to the torque produced in t...

Chemistry
The protective action of ozone in the atmosphere comes through ozone's absorption of UV radiation in the 230 to 290 nm wavelength range. What is the energy, in kilojoules per mole, associated with radiation in the wavelength range?

science
Calculate the weight of a person with a mass of 67 kg that is holding a 12 kg box on earth

math
you just subtract the two.. it is telling you he drove x miles in one year then x miles is another.. what is the difference

algebra
a painter charged $320 to paint two walls taht measure 12 feet by 9ft and two walls that measured 10 ft by 9 ft. The client asks him to return to paint two walls that measue 15 ft by 12 ft and two walls that measure 18.5 feet by 12 ft. If the painter charges the same rate, wha...

algebra 1
Tell whether the sequence is arithmetic. If the sequence is arithmetic, write a function rule to represent it. 12, –9, 6, –3, ...

math
one mile is 5280feet.justin has a stride of 32inches .how many steps will he take to run a 26 mile marathon?

physics
Part (a) of the drawing shows a bucket of water suspended from the pulley of a well; the tension in the rope is 69.0 N. Part (b) shows the same bucket of water being pulled up from the well at a constant velocity. What is the tension in the rope in part (b)?

physics
A tourist being chased by an angry bear is running in a straight line toward his car at a speed of 5.31 m/s. The car is a distance d away. The bear is 18.6 m behind the tourist and running at 8.01 m/s. The tourist reaches the car safely. What is the maximum possible value for d?

physics
The Space Shuttle travels at a speed of about 5.45 x 103 m/s. The blink of an astronaut's eye lasts about 111 ms. How many football fields (length = 91.4 m) does the Space Shuttle cover in the blink of an eye?

math
(10+3x)(10-3x)

eng
what is a thesis?

Chemistry
What concentration of the salt NaC2H3O2 must be added to shift the equilibrium toward the reactants so that the [H3O+] concentration is reduced to pH = 5.4? Ka=1.8E-5

Science
Two parents have three children. They have two girls and one boy. What is the probability that the next child will be a boy?

7th Grade Language Arts ~!!!!
1. Sentence fluency can be achieved by _______________. (1 point) (1 pt) adding appropriate transitions (0 pts) using technical terms (0 pts) avoiding long quotations 1 /1 point 2. In order to establish the most appropriate voice in a research report, you should consider _____...

7th Grade Language Arts ~!!!!
1. Sentence fluency can be achieved by _______________. (1 point) (1 pt) adding appropriate transitions (0 pts) using technical terms (0 pts) avoiding long quotations 1 /1 point 2. In order to establish the most appropriate voice in a research report, you should consider _____...

7th Grade Language Arts ~!!!!
1. Sentence fluency can be achieved by _______________. (1 point) (1 pt) adding appropriate transitions (0 pts) using technical terms (0 pts) avoiding long quotations 1 /1 point 2. In order to establish the most appropriate voice in a research report, you should consider _____...

7th Grade Language Arts ~!!!!
1. Sentence fluency can be achieved by _______________. (1 point) (1 pt) adding appropriate transitions (0 pts) using technical terms (0 pts) avoiding long quotations 1 /1 point 2. In order to establish the most appropriate voice in a research report, you should consider _____...

Science
If one light bulb was removed in a circuit I think the others will go out because it is incomplete is this right? I will the remaining lights powered by a 9 volt be dim? I am not sure? I think go black dark because its incomplete.

Science
Thank you! I will read the link and study. Might have other questions maybe.

Science
I guess if all four switches were turned on.Would just just silver ? Why wouldn't yarn? I understand wood when it is wet that makes sense.

Science
Can wood, silver or yarn light up a light bulb? I think wood can carry a current.

history
How did Enlightenment thinkers attempt to apply the techniques of the Scientific Revolution to human political and social organizations?

physical
Sanchez Mr Potato? Q

science
web physiology? lol due tmrw?

math question
thank you

math question
Why is 6/8 not equivalent to 18/32 ??

physics
heading due north at 6.00 m/s relative to the water. The local ocean current is 1.53 m/s in a direction 40° north of east. What is the velocity of the ship relative to the earth?

physics
a 40 kg high jumper leaves the ground with a speed of 6m/s. how high can he jump ?

physics
a 65 kg student, starting from rest , slides down an 8 meter high water slide. how fast is he going at the bottom of the slide ?

health
Oh my bad i meant D!

health
To keep a positive attitude on the job, you should A. look for the perfect company—this will ensure everything will be all right. B. complain about the things that bother you so they can get straightened out. C. encourage others to help you with your work. D. look for th...

music
Einstein on a Beach was a unique opera because it A. had a single violinist. B. was exclusively recitative. C. was written in Chinese. D. had no plot and very little singing. Is it C?

music
. Beethoven's greatest psychological challenge as a composer was A. coping with his worsening deafness. B. the unrealistic expectations of his patrons. C. his resistance to finishing works he had started. D. overcoming his own perfectionism.

music
The composer utilized the minor mode in Symphonie fantastique to represent A. joy and love. B. gloom and ferocity. C. solemnity and brilliance. D. earthiness. I'm thinking B .

music
Oh so its C!

music
Which of the following works helped to redefine the symphony as a genre? A. Beethoven's Sixth Symphony B. Beethoven's Fifth Symphony C. Symphonie Fantastique D. Beethoven's Ninth Symphony Im thinking its B, right?

music
i think its D , is that right?

music
In a shift from earlier thinking, the social status of nineteenth-century composers became equivalent to that of A. lords and courtiers. B. tailors and hatters. C. woodworkers and carriage builders. D. painters and poets.

everything
If you work in a hospital or doctor's office and assign numeric values to procedures and diagnoses for the purpose of reimbursement, you are a A. coding specialist B. medical assistant C. receptionist D. transcriptionist

life
The first antibiotic was made because of properties discovered in a certain type of A. spider. B. mold. C. blood. D. herb.

health
If you work in a hospital or doctor's office and assign numeric values to procedures and diagnoses for the purpose of reimbursement, you are a A. coding specialist B. medical assistant C. receptionist D. transcriptionist

health
Combining two or more segments of the industry to deliver the best care, at the most cost-effective rate, in the best setting refers to a/an A. integrated delivery system. B. diagnosis-related group. C. health maintenance organization. D. preferred provider organization system

Math
a. Express f(x)=x^2 - 6x + 14 in the form f(x)=(x-h)^2 + k, where h and k are to be determined. b.Hence, or otherwise, write down the coordinates of the vertex of the parabola equation y=x^2 - 6x + 14.

math
determine the radius of convergence of the power series: Σ(n=1 to inf) [(2^n * n! * x^n)/ n^n]

math,algerbra
area of circle is given by equation: A = pi*r^2 , where A is area pi is 3.14 r is radius 2) A = pi*(11.5^2) = 3.14*(11.5^2) = ? 3) radius is half the diameter d so r = 3.5 /2 = 1.75 Then area is, A = pi*(1.75^2) = 3.14*(1.75^2) = ?

Science
Write a paragraph explaining why a color-blind man who has three daughters and one son with normal color vision might have two grandsons who are color-blind. Use the terms in the vocabulary box in your answer. Underline each term. genotype recessive phenotype dominant allele g...

math
there is not 5 numbers...although there is this: 1+3+5+5+17+19 = 50 one number is repeated twice other than that there is no solution

physical science
if 34,560 j of work was done with a force of 960 n, how far was the object moved?

Physics
If each tire of an automobile has an area of .026 square meter in contact with the ground, the weight of the automobile is 26,000 N, what is the pressure in the tires? Please show work.

Physics
An aluminum bar has the desired length when at 10 degrees Celsius. How much stress is required to keep it at this length if the temperature increases to 33 degrees Celsius?

math
1/7[4ln(x+9)-lnx-(x^2-25)]

Statistics
Sooo...I see you are having problems with this too! LOL

math
Jim has grades of 84, 65, and 76 on three math tests. What grade must he obtain on the next test to have an average of exactly 80 for the four tests?

Math
Seoul,South Korea

Math
Janice wants to know the total number of games won by the Denver Nuggets basketball team over the three seasons shown in the table. What expression should she simplify? Explain how she can use mental math and the properties (Associative, Commutative, Distributive, or Identity)...

History
William Shakespeare recorded early English History as a historian for the Tudor line True False

Maths
x^2+x-4 (x-2)(x+2) x^2-2x-15 (x+3)(-5)

Pre cal
Three digits are randomly selected without replacement for one 1, two 9's and one 6. What is the possibility that the three digit number is a multiple of 3?

calculus 2
Find the volume of the solid formed by rotating the region enclosed by y=e^(5x) , \ y=0, \ x=0, \ x=0.8 around the y-axis Please help, i have been attempting these problems for a couple of days

Math
How Do I Do An Expanded Algorithm For 23x17 ?

algebra
$16 added to an amount of money saved,s, then spent equally on 3 items what does the expression mean?

calculus 2
Justify, with a written explanation or a mathematical reasoning and with a sketch of at least two different cases, the following properties of integrals: a) If f(x) is less than or equal to g(x) for a<=x<=b then integrate from a to b of f(x)dx is less than or equal to in...

math, calculus 2
how did you get the -4 in your first step? i dont understand where that came from

math, calculus 2
Consider the area between the graphs x+y=16 and x+4= (y^2). This area can be computed in two different ways using integrals. First of all it can be computed as a sum of two integrals integrate from a to b of f(x)dx + integrate from b to c of g(x)dx What is the value of a, b, c...

Math
Decide whether to integrate with respect to x or y. Then find the area of the region: 2y=5sqrt(x), y=4, and 2y+2x=7.

Chem
If a rock climber accidentally drops a 56-gram piton from a height of 375 meters, what would its speed be before striking the ground? Ignore the effects of air resistance.

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