Sunday

February 19, 2017
Total # Posts: 3,399

**Physics HELP!**

A block of mass 3 kg slides along a horizontal surface while a 20-N force is applied to it at an angle of 25°. If needed, use g = 10 m/s2. For a coefficient of kinetic friction of 0.3 between the block and the surface, the frictional force acting on the block is most ...

*May 25, 2012*

**geometry**

The equation (x + 6)2 + (y + 4)2 = 36 models the position and range of the source of a radio signal. Describe the position of the source and the range of the signals.

*May 19, 2012*

**accounting**

1.On December 15, 2012, Pascal declared a cash dividend of $2.00 per share to stockholders of record on December 31. The dividend is payable on January 15, 2013. Pascal has issued 1,000,000 shares of common stock, of which 50,000 shares are held in treasury. 2.At December 31, ...

*May 12, 2012*

**Math**

In how many ways can four spades be drawn from a standard deck of playing cards with out replacement?

*May 8, 2012*

**English**

you guys are crazy.

*May 8, 2012*

**Finance**

A person is considering buying the stock of two home health companies that are similar in all respects except the proportion of earnings paid out in dividends. Both companies are expected to earn $6 per share in the coming year, but company D (for dividends) is expected to pay...

*May 7, 2012*

**Finance**

Six years ago, Bradford Community Hospital issued 20-year municipal bonds with a 7% annual coupon rate. The bonds were called today for a $70 call premium- that is, bondholders received $1,070 for each bond. What is the realized rate of return for those investors who bought ...

*May 7, 2012*

**chemistry**

Give delta H for the combustion of propane: C3H8+5O2+3CO2+4H20 +530KCAL delta h= -530 KCAL But how do i figure out how to get this answer? Thanks!

*May 6, 2012*

**ECO/372**

SOME factors include: The inflation rate is an important factor influencing the Fed’s decision to adjust the discount rate. During periods of recession, the Fed will lower the discount rate to attempt to stimulate growth in the economy. The reserve requirements and ...

*May 6, 2012*

**Physics**

A charge of +2.4 × 10−9 C is placed at the origin, and another charge of +4.2 × 10−9 C is placed at x = 2.5 m. Find the point (coordinate) between these two charges where a charge of +3.1 × 10−9 C should be placed so that the net electric ...

*May 1, 2012*

**math**

triangle

*May 1, 2012*

**physics**

A charge of +2.4 × 10−9 C is placed at the origin, and another charge of +4.2 × 10−9 C is placed at x = 2.5 m. Find the point (coordinate) between these two charges where a charge of +3.1 × 10−9 C should be placed so that the net electric ...

*May 1, 2012*

**math**

Use the grid to help you complete the calculation 23x17

*April 29, 2012*

**Honors Trig.**

A plane is flying at a speed and direction of 550 mph, 25 degrees north of west. There is a wind of 28 mph, at an angle of 19 degrees south of the east direction. How fast is the plane actually flying? What direction is the plane traveling?

*April 29, 2012*

**math**

determine if these lines are parallel, perpendicular, or neither 2x+5y=8 and 5x+2y=2

*April 27, 2012*

**Maths**

Solve:- 5ax+6by=28 , 3ax+4by=18 using cross multiplication method

*April 27, 2012*

**physics**

what color appears on the screen where the two beams overlap?

*April 25, 2012*

**physics**

suppose two beams of white light are shone on a white screen, one beam through a pane of red glass and the other through a pane of green glass. what color appears on the screen wehre the two beams overlap?

*April 25, 2012*

**Plz help!!! algebra**

use the binomial theorem to expand the binomial (x-5)^6

*April 21, 2012*

**Plz help!!! algebra**

use the binomial theorem to expand the binomial (x+5)^5 I have tried it like 4 times but i cannot get it right

*April 21, 2012*

**physics**

Use the equation F=k|q1||q2|/r^2 and plug in your givens

*April 19, 2012*

**chemistry**

What are the total grams of iron

*April 16, 2012*

**math**

Ms.Lembright ordered the types of muffins below for a class party -12 blueberry muffins for $7.20 -8 chocolate muffins for $4.40 -6 raisin muffins for $4.50 What type of muffin cost the least? show your work please help me!!?

*April 15, 2012*

**PSY315**

Based on the information given for each of the following studies, decide whether to reject the null hypothesis. For each, give (a) the Z-score cutoff (or cutoffs) on the comparison distribution at which the null hypothesis should be rejected,(b) the Z score on the comparison ...

*April 14, 2012*

**Plz help!!! algebra**

convert the decimal 0.6 to a fraction by writing it as a infinite series. I really have no idea how to do this can anyone please help me?

*April 14, 2012*

**algebra**

systems of nonlinear equations i need to help i have tried this problem but i cannot find the right answer i need to determine the real solutions for this: x^2+4xy=10 4x^2-xy=6

*April 9, 2012*

**please help!! algebra**

systems of nonlinear equations i need to help i have tried this problem but i cannot find the right answer i need to determine the real solutions for this: x^2+4xy=10 4x^2-xy=6

*April 9, 2012*

**algebra**

systems of nonlinear equations i need to help i have tried this problem but i cannot find the right answer i need to determine the real solutions for this: x^2+4xy=10 4x^2-xy=6

*April 9, 2012*

**physics**

An object is placed in front of a convex mirror with a 22.6-cm radius of curvature. A virtual image half the size of the object is formed. At what distance is the object from the mirror? Take a positive answer to be in front of the mirror, and a negative answer to be behind ...

*April 5, 2012*

**algebra**

systems of linear equations in 3 variables 1/3x-2/3y+z=0 1/2x-3/4y+z=1/4 -2x-y+z=1 every time i do it is wrong and i cannot figure out what I'm doing wrong please help!!!

*April 2, 2012*

**algebra**

systems of linear equations in 3 variables 1/3x-2/3y+z=0 1/2x-3/4y+z=1/4 -2x-y+z=1

*April 2, 2012*

**algebra**

x-3y+z=8 3x+y-2y=4 x-3y+2z=6

*April 2, 2012*

**algebra**

I do not know how to solve the following systems of linear equations in 3 variables 1) x-2y+z=7 2) 2x+y-3z=-1 3) x-4y+3z=13

*April 2, 2012*

**Physics: Second Part of first question**

If the slide is inclined at 55 , what is thecoefficient of friction between the girl and the slide?

*March 30, 2012*

**Physics. PLEASE HELP!!**

A 22 kg girl slides down a playground slide that is 3.6 m high. When she reaches the bottom of the slide, her speed is 1.7 m/s. The acceleration of gravity is 9.81 m/s2. How much energy was dissipated by fric-tion? Answer in units of J

*March 30, 2012*

**Chemistry**

The resolution limit of a microscope is roughly equal to the wavelength of light used in producing the image. Electron microscopes use an electron beam (in place of photons) to produce much higher resolution images, about 0.16 nm in modern instruments. Assuming that the ...

*March 30, 2012*

**Physics. PLEASE HELP!!**

A skier of mass 71 kg is pulled up a slope by a motor-driven cable. The acceleration of gravity is 9.8 m/s2. How much work is required to pull him 64.6 m up a 33.8 slope (assumed to be frictionless) at a constant speed of 2.53 m/s? Answer in units of kJ

*March 26, 2012*

**Physics. PLEASE HELP!!**

NOTE: 1 MJ = 106J. One of the most powerful cranes in the world, operating in Switzerland, can slowly raise a load of 6000 tonne to a height of 8 m. (1 tonne = 1000 kg) The acceleration of gravity is 9.81 m/s2 . How much work is done by the crane? Answer in units of MJ

*March 26, 2012*

**human development**

is it alzheimer's disease

*March 26, 2012*

**human development**

bulimia Alzheimer's disease osteoporosis menopause

*March 26, 2012*

**human development**

a condition that's generally the result of social pressure is?

*March 26, 2012*

**english ~ poems**

America by James Monroe Whitfield "America, it is to thee, Thou boasted land of liberty,— It is to thee I raise my song, Thou land of blood, and crime, and wrong. It is to thee, my native land, From whence has issued many a band To tear the black man from his soil, ...

*March 24, 2012*

**Physics. PLEASE HELP!!**

Find the power of a force F= (10 N)ˆý +(−4 N)ˆj if the velocity v = (−4 m/s)ˆý +(4 m/s)ˆj. Answer in units of W (^i and ^j means i hat and j hat)

*March 23, 2012*

**Physics. PLEASE HELP!!**

Find the power input of a force F=(7 N)ˆý + (3 N) ˆk acting on a particle that moves with a velocity v = (6 m/s)ˆý. Answer in units of W

*March 23, 2012*

**biology**

Name a covalent bond of amylose that can become hydrolyzed? Name a cvalent bond of Casein that can become hydrolyzed?

*March 22, 2012*

**physic**

In an experiment, a mass m = 40 gm, attached to a string wrapped around the axle of a flywheel and starting from rest, falls through a distance of 147 cm in 3.5 seconds. The diameter of the axle of the flywheel is 12 cm What is the acceleration of the mass and the angular ...

*March 22, 2012*

**Psych**

I have a test that accurately predicts who will learn statics quickly. My test has a. predictive validity but not reliability b. content validity but not predicitive validity c. predictive valisity and reliability d. neither validity nor reliability

*March 21, 2012*

**Psych**

If an iq test has high predictive validity, then a. a psychologist can accurately guess what score someone will get before he or she has started the test. b. students who get good score on the test will get even better scores if they take the test again c. The mean and ...

*March 21, 2012*

**business-ACCOUNTING**

Income from operations, $151,800 The following events took place for Fed Inc. during October 2012, the first month of operations as a producer of road bikes: • Purchased $427,000 of materials. • Used $367,500 of direct materials in production. • Incurred $315,...

*March 20, 2012*

**Chemistry**

so 1790 x (183/58.08) ?

*March 19, 2012*

**Chemistry**

Consider the following thermochemical equation for the combustion of acetone (C3H6O), the main ingredient in nail polish remover: C3C6O + 4 O2 --> 3 CO2 + 3H2O DELTA Hrxm= -1790kJ If a bottle of nail polish remover contains 183 mL of acetone, how much heat would be released...

*March 19, 2012*

**Geometry**

Find the area of the regular polygon with the given radius. Radius: 6cm. Area= apothem x perimeter/ 2

*March 19, 2012*

**phi103**

Mrs. Sue please help! I really need some help on these questions Please! I am having a very tough time. I have tried to answer to the best of my ability, but i am not understanding these. Can someone please help with this? Thank you. Truth tables can be used to examine ...

*March 18, 2012*

**PHI103**

I really need some help on these questions Please! I am having a very tough time. I have tried to answer to the best of my ability, but i am not understanding these. Can someone please help with this? Thank you. Truth tables can be used to examine inductive arguments. ...

*March 18, 2012*

**PHI103**

thank you for the input

*March 15, 2012*

**PHI103**

Imagine someone asks you what you have learned in your logic class and what you found to be the most useful information you learned there. Is it important for people to study logic? What kinds of mistakes might they make without having been exposed to a careful study of ...

*March 15, 2012*

**Chem 1A**

A 15.00 g sample of an ionic compound NaA, where A- is the anion of a weak acid, was dissolved in enough water to make 100.0 mL of solution and was then titrated with 0.100 M HCl. After 700.0 mL of HCl was added, the pH was 5.00. The experimenter found that 1.40 L of 0.100 M ...

*March 15, 2012*

**Physics**

Consider the 665 N weight held by two cables The left-hand cable had tension T2 and makes an angle of 43◦ with the ceiling. The right-hand cable had tension T1 and makes an angle of 48◦ with the ceiling. What is the tension in the cable T1 slanted at an angle of 48...

*March 15, 2012*

**Calculus (Please check my work!)**

^thats wrong. I got it wrong. sorry.

*March 15, 2012*

**Chemistry**

Predict the products when a chemist mixes an aqueous sodium chloride solution with an aqueous calcium nitrate solution.

*March 14, 2012*

**Chemistry**

A chemist mixes aqueous sodium bromide and aqueous lead (II) nitrate. Predict the product(s) of the reaction.

*March 14, 2012*

**CALCULUS**

12,240 lbs is the answer.

*March 12, 2012*

**4th grade math**

288/6=48. 48*5=240

*March 12, 2012*

**ACC 290**

How would I record the following transactions into a "T" account? This information relates to Pickert Real Estate Agency. Oct. 1 Stockholders invest $30,000 in exchange for common stock of the corporation. 2 Hires an administrative assistant at an annual salary of $...

*March 12, 2012*

**PHI103**

If the word "should" appears in a sentence, that sentence will always involve an ethical claim. True False To tell you the truth i really do not know this but maybe it could be true

*March 11, 2012*

**PH103**

A good way to establish a conclusion as true, or probable, is to A)insist that you are correct. b)construct a strong argument. c)construct a fallacious argument. d)ignore any objections to your conclusion I think it is b, can you help me to be sure.

*March 11, 2012*

**PHi103**

Karl Popper advocates, as a more efficient way to examine a scientific hypothesis, which of the following? a)Gather as much data as possible supporting the hypothesis b)Fake the data c)Try to show the hypothesis is false d)Meditate on what the hypothesis really means I believe...

*March 11, 2012*

**PHi103**

Karl Popper advocates, as a more efficient way to examine a scientific hypothesis, which of the following I believe it could be A Gather as much data as possible supporting the hypothesis

*March 11, 2012*

**Chemistry Help! Thank you :)**

Thank you!

*March 11, 2012*

**Chemistry Help! Thank you :)**

Assuming the final solution will be diluted to 1.00 , how much more should you add to achieve the desired pH? Information: Imagine that you are in chemistry lab and need to make 1.00 L of a solution with a pH of 2.80. You have in front of you: 100 ml of 7.00×10−2 M...

*March 11, 2012*

**Math**

0.0003556 in scientific notation

*March 8, 2012*

**Math**

Sarah drove 30 miles with an average speed of 40mph. How long was she driving for?

*March 8, 2012*

**math**

George is making a circle graph of the basketball shots he made during the season. He made 16 foul shots, 29 two-point shots, and 5 three-point shots. What will be the measure of the angle he makes when creating the sector for foul shots?

*March 8, 2012*

**Physics**

The acceleration of gravity at the surface of the moon is approximately 1/6 that at the surface of the Earth (9.8m/s). What is the weight of an astronaut standing on the moon whose weight on Earth is 180lbs?

*March 8, 2012*

**ACC 290**

What is an example of an accrual?

*March 7, 2012*

**ACC 290**

When might an accountant use cash basis accounting without violating GAAP?

*March 7, 2012*

**english**

when Odysseus described his reputation for guile to Alcinous, he is revealing A)internal conflict B)character C)external conflict D)irony

*March 7, 2012*

**math 2nd grade**

what is 3/5 of 10? what is 1/3 of 12?

*March 5, 2012*

**Chemistry**

Calculate the pH of a 5.90 10-3 M solution of H2SO4 I have tried doing this as pH=-log[H+] and also by multiplying the Molarity by two because there are two hydrogens and then doing the -log but both ways have gotten me the wrong answer is there something i am missing? same ...

*March 5, 2012*

**Chemistry**

Calculate the pH of an aqueous solution containing 3.8 10-2 M HCl, 1.0 10-2 M H2SO4, and 3.3 10-2 M HCN.

*March 5, 2012*

**physics**

If the height of the water slide in the figure below is h1 = 1.55 m and h2 = 1.35 m, and the person's initial speed at point A is 0.593 m/s, at what location does the swimmer splash down in the pool?

*March 4, 2012*

**Chemistry**

How many moles of water are in 1.0g of water? (Give number only in space below to the correct number of significant figures)

*March 4, 2012*

**Chemistry**

In 1 mole of CaCl2 there are ____ moles of chloride ions. A. 1 B. 2 C. 0.5 D. None of these

*March 4, 2012*

**Chemistry**

There are _______ oxygen ions in 1 mole of Na2O. A. 6.0 x 10^23 O2 ions B. 1.2 x 10^24 O2 ions C. 3.0 x 10^23 ions D. None of these

*March 4, 2012*

**Stats**

Given that a sample is approximately bell-shaped with a mean of 60 and a standard deviation of 3, the approximate percentage of data values that is expected to fall between 54 and 66 is 75% 95% 68% 99.7%

*March 3, 2012*

**Chem**

When I do a) I get an answer of 0.298M, however, it says I'm wrong. b) worked perfectly

*March 2, 2012*

**Chem**

What stoichiometric concentration of the indicated substance is required to obtain an aqueous solution with the pH value shown below? a)aniline, C6H5NH2, for pH= 9.05 b)NH4Cl for pH= 5.22

*March 2, 2012*

**psychology**

a condition of late adulthood in which the pressure in the eye increases

*March 1, 2012*

**Physics**

An electron moves with speed 2.46 x 105 m/s in a 1.39-T uniform magnetic field. At one instant, the electron is moving due west and experiences an upward magnetic force of 2.81 x 10−14 N. Caculate the magnetic field (angle). What is the direction of the magnetic field? ...

*March 1, 2012*

**math 2nd grade**

Makoto and Otis each decorate diamond patterns that are the same size and shape. Makoto deoorates 1/8 of a diamond. Otis decorate 1/4 of a diamond. Who decorates more

*February 29, 2012*

**math 2nd grade**

Dwayne eats 1/9 of the raisin bread. Francisco eats 1/3 of the raisin bread. Who eats more raisin bread?

*February 29, 2012*

**1st grade math**

what addition fact can help you find 14-4? explain

*February 29, 2012*

**math 2nd grade**

Dwayne eats 1/9 of the raisin bread. Francisco eats 1/3 of raisin bread. who eats more raisin bread?

*February 29, 2012*

**math 2nd grade**

valarie makes 2 pans of brownies for a bake sale. She cuts each pan into 12 brownies. She sell 15 brownies. What fractional part of a pan of brownies did valarie sell?

*February 29, 2012*

**math**

valarie makes 2 pans of brownies for a bake sale. She cuts each pan into 12 brownies. She sell 15 brownies. What fractional part of a pan of brownies did valarie sell?

*February 29, 2012*

**math**

what addition fact can help you find 14-4? explain

*February 29, 2012*

**Physics. PLEASE HELP!!**

A small, spherical bead of mass 1.9 g is released from rest at t = 0 in a bottle of liquid shampoo. The differential equation of motion is dv/dt = g−b/m*v . The terminal speed is observed to be 1.6 cm/s. The acceleration of gravity is 9.8 m/s2 . Find the value of the ...

*February 29, 2012*

**Physics. PLEASE HELP!!**

Thank You!!!

*February 29, 2012*

**Physics. PLEASE HELP!!**

A Ferris wheel rotates 4 times each minute and has a diameter of 17 m. The acceleration of gravity is 9.8 m/s2. What is the centripetal acceleration of a rider? Answer in units of m/s2

*February 29, 2012*

**Physics. PLEASE HELP!!**

A Ferris wheel rotates 4 times each minute and has a diameter of 17 m. The acceleration of gravity is 9.8 m/s2. What is the centripetal acceleration of a rider? Answer in units of m/s2

*February 29, 2012*