# mel

Popular questions and responses by mel-
## physics

A 5 kg block is placed near the top of a frictionless ramp, which makes an angle of 30o degrees to the horizontal. A distance d = 1.3 m away from the block is an unstretched spring with k = 3000 N/m. The block slides down the ramp and compresses the

*asked on March 11, 2012* -
## FINANCE

Yield to call Six years ago, the Singleton Company issued 20-year bonds with a 14 percent annual coupon rate at their $1,000 par value. The bonds had a 9 percent call premium, with 5 years of call protection. Today, Singleton called the bonds. Compute the

*asked on September 18, 2007* -
## physics

A block weighing 8.3 N requires a force of 2.6 N to push it along at constant velocity. What is the coefficient of friction surface? A weight W is now placed on the block and 8.2 is needed to push them both at constant velocity. What is the weight W of the

*asked on March 19, 2010* -
## chem

You are given the following data. P4(s) + 6 Cl2(g) 4 PCl3(g) H = -1225.6 kJ P4(s) + 5 O2(g) P4O10(s) H = -2967.3 kJ PCl3(g) + Cl2(g) PCl5(g) H = -84.2 kJ PCl3(g) + 1/2 O2(g) Cl3PO(g) H = -285.7 kJ Calculate H for the following reaction. P4O10(s) + 6

*asked on December 1, 2007* -
## Urgent math help!!

What is the value of sinθ given that (−3,4) is a point on the terminal side of θ ? −3/5 3/5 4/5

*asked on April 13, 2017* -
## Physics

what maximizes our ability to recover elastic potential energy?

*asked on February 21, 2016* -
## Quick calc question

The Riemann sum, the limit as the maximum of delta x sub i goes to infinity of the summation from i equals 1 to n of f of the quantity x star sub i times delta x sub i , is equivalent to the limit as n goes to infinity of the summation from i equals 1 to n

*asked on February 11, 2016* -
## Chemistry

Consider the following unbalanced equation. H1+(aq) + Fe(s) H2(g) + Fe2+(aq) What is the balanced oxidation half-reaction? What is the balanced reduction half-reaction? What is the balanced overall cell reaction?

*asked on June 8, 2012* -
## Calculus

The position function of a particle in rectilinear motion is given by s(t) = 2t^3 – 21t^2 + 60t + 3 for t ≥ 0. Find the position and acceleration of the particle at the instant the when the particle reverses direction. Include units in your answer.

*asked on January 8, 2016* -
## calc

Given the position function, s of t equals negative t cubed divided by 3 plus 13 times t squared divided by 2 minus 30 times t, between t = 0 and t = 9, where s is given in feet and t is measured in seconds, find the interval in seconds where the particle

*asked on January 8, 2016* -
## Physics- Elena please help!

Part of a roller-coaster ride involves coasting down an incline and entering a loop 30.0 m in diameter. For safety considerations, the roller coasters speed at the top of the loop must be such that the force of the seat on a rider is equal in magnitude to

*asked on October 27, 2012* -
## chem

One mole of H2O(g) at 1.00 atm and 100.°C occupies a volume of 30.6 L. When one mole of H2O(g) is condensed to one mole of H2O(l) at 1.00 atm and 100.°C, 40.66 kJ of heat is released. If the density of H2O(l) at this temperature and pressure is 0.996

*asked on November 26, 2007* -
## Quick calc question

Use the table below to evaluate the derivative with respect to x of g of f of 2 times x at x = 1. x 1 2 3 4 f(x) 6 1 8 2 f ′(x) 6 1 8 2 g(x) 1 4 4 3 g ′(x) 9 5 5 –4

*asked on January 30, 2016* -
## math-calculus

A spherical party balloon is being inflated with helium pumped in at a rate of 12 cubic feet per minute. How fast is the radius growing at the instant when the radius has reached 1 ft?

*asked on December 17, 2012* -
## science

how would you make 500.0mL of a 0.200M NaOH solution from a 15.0 M stock NaOH solution?? I assume that you want the volumes rather than the mechanics of carrying it out? a) How many moles do you need in the 500 ml to have 0.200 M? b) What volume of 15.0 M

*asked on April 5, 2007* -
## Math

Topic: Water Footprint. City of New York 2011 rate of 7.64/100 cubic feet of water. Calculate the cost of each of the following based on this rate. Use the conversion factor of 7.48 gallons per cubic food. A. A standard washing machine uses approximately

*asked on April 24, 2017* -
## chemistry

water vapor and nitrogen dioxide gas NO2 are cimbined to manufacture ammonia. a by product of this reaction is oxygen gas. write a balanced equation for this reaction. i do not understand this at all please help me figure it out

*asked on April 16, 2009* -
## physics

Hey can someone help with this. A movie stuntwoman drops from a helicopter that is 30.0 m above the ground and moving with a constant velocity whose components are 10.0 m/s upward and 15.0 m/s horizontal and toward the south. You can ignore air resistance.

*asked on September 26, 2008* -
## Algebra

How to write |y|-2=0 in standard form?

*asked on February 12, 2017* -
## Quick calc question

Which of the following definite integrals could be used to calculate the total area bounded by the graph of y = 1 – x2 and the x-axis? the integral from 0 to 1 of the quantity 1 minus x squared, dx plus the integral from 1 to 2 of the quantity 1 minus x

*asked on February 12, 2016* -
## Quick calc question

Find the x-coordinates where f '(x) = 0 for f(x) = 2x + sin(4x) in the interval [0, π].

*asked on January 29, 2016* -
## Calculus

What is the maximum volume in cubic inches of an open box to be made from a 16-inch by 30-inch piece of cardboard by cutting out squares of equal sides from the four corners and bending up the sides? Your work must include a statement of the function and

*asked on January 8, 2016* -
## Physics

Approximately 4x10^9 kg of matter is converted into energy in the sun per second. Express the power output of the sun in watts.

*asked on September 27, 2012* -
## algebra 2

If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to x from the first equation is substituted into the second equation. x + y = 2 3x + 2y = 9

*asked on August 16, 2012* -
## programming and visual basics

Using pseudocode or a flowchart write a program that does the following: Design the logic for the game Hangman, in which the user guesses letters in a hidden word. Store the letters of a word in an array of characters. Display a dash for each missing

*asked on March 30, 2016* -
## World History Honors

is this primary source ? The Black Death A Description of the Plague This first account is from Messina, and it described the arrival and initial progress of the disease. At the beginning of October, in the year of the incarnation of the Son of God 1347,

*asked on September 26, 2011* -
## college

What is the mass of a 10.0 cm^3 cube of copper?

*asked on August 27, 2010* -
## chem

calculate the max wavelength of light capable of removing an electron for a hydrogen atom from the energy state characterized by the following : n=2 in nm n=4 in nm

*asked on December 6, 2007* -
## Math

Suppose a person were to breath an average of 16 times per minute. How many years would it take for them to breath one billion times? Assume there are 365 days in one year. Round your answer to the nearest single year.

*asked on April 24, 2017* -
## Quick calc question

Write the Riemann sum to find the area under the graph of the function f(x) = x2 from x = 1 to x = 5. 1. the summation from i equals 1 to n of the product of the quantity squared of 1 plus 5 times i over n and 4 over n 2. the limit as n goes to infinity of

*asked on February 12, 2016* -
## Quick calc question

For f of x equals the quotient of the quantity 1 minus x and the quantity 1 plus x and g of x equals the quotient of the quantity x and the quantity 1 plus x, find the simplified form for f [g(x)] and state the domain.

*asked on January 30, 2016* -
## Calculus

The side of a square is measured to be 10 ft with a possible error of ±0.1 ft. Use differentials to estimate the error in the calculated area. Include units in your answer.

*asked on January 8, 2016* -
## Finance

1. Following is the projected net income stream associated with the use of Zartek technology. (Note: this net income stream does not take into account that Zartek’s owners invested $2,000 to develop Zartek in Year 0.) Globus Maximus Enterprises would

*asked on December 28, 2014* -
## psychology

Rind, B., & Strohmetz, D. (1999). Effect on restaurant tipping of a helpful message written on the back of customers’ checks. Journal of Applied Psychology, 29, 139-144. doi:10.1111/j.15591816.1999.tb01378.x This is the article to use to answer these

*asked on July 6, 2014* -
## Psychology

Wookey, M. L., Graves, N. A., & Butler, J. C., (2009). Effects of a sexy appearance on perceived competence of women. The Journal of Social Psychology, 149, 116-118. doi:10.3200/SOCP.149.1.116-118 This is the article to use 1. What are the design elements

*asked on July 6, 2014* -
## physics

A shell is fired from the ground with an initial speed of 1.58 103 m/s at an initial angle of 31° to the horizontal. (a) Neglecting air resistance, find the shell's horizontal range. m (b) Find the amount of time the shell is in motion. s

*asked on November 18, 2012* -
## Physics

Two students are on a balcony 24.3 m above the street. One student throws a ball, b1, vertically downward at 15.8 m/s. At the same instant, the other student throws a ball, b2, vertically upward at the same speed. The second ball just misses the balcony on

*asked on October 9, 2012* -
## science

Mountains produced by tensional stress, like the Teton Range in Wyoming, are called

*asked on June 2, 2012* -
## Chemistry

HELP! :) Consider the following reaction: 3A to 2B The average rate of appearance of B is given by deltaB divided by delta t. Comparing the rate of appearance of B and the rate of disappearance of A, we get Delta B divided by Delta t= ___* (-delta A

*asked on May 24, 2012* -
## physics

A 50.2 kg child slides down a water slide with a velocity of 1.1 m/sec at the top. At the bottom of the slide, she is moving horizontally, 1.5 meters above the water. She splashes into the water 2.5 meters to the right of the bottom of the slide. a)

*asked on March 11, 2012* -
## math

Six hundred pennies are placed in a row. If every other penny is replaced by a nickel and every third coin is replaced by a quarter, what is the final value of the 600 coins?

*asked on September 27, 2011* -
## Organic Chemistry

Why does eugenol and d-limonene dissolve in dichloromethane?

*asked on February 11, 2011* -
## physics

In a visit to the nation's capital, a foreign head of state travels from (−3.0, −4.0) km to (4.0, 7.0) km. She then travels with a displacement of (−5.0, -3.8) km. Calculate the her total displacement over the course of the trip. ANSWER SHOULD BE IN

*asked on December 19, 2010* -
## help!

2cr(s) + SnCL4(aq) --> can this reaction occur if so write the balanced equation if it doesnt explain why

*asked on April 16, 2009* -
## english

can you give me a good sentence using the word biology and biography

*asked on February 1, 2009* -
## chem

Consider the following cyclic process carried out in two steps on a gas. Step 1: 48 J of heat is added to the gas, and 20. J of expansion work is performed. Step 2: 70. J of heat is removed from the gas as the gas is compressed back to the initial state.

*asked on December 2, 2007* -
## Finance

Interest rate premiums A 5-year Treasury bond has a 5.2 percent yield. A 10-year Treasury bond yields 6.4 percent, and a 10-year corporate bond yields 8.4 percent. The market expects that inflation will average 2.5 percent over the next 10 years (IP10 _

*asked on September 15, 2007* -
## algebra

If f(x)=x+7 and g(x)=1/x-13, what is the domain of (f x g)(x)? Please explain.

*asked on April 10, 2019* -
## Math

Can someone get the math for the worksheet? I'm havibg troubles getting the answers and how to get them. Thxs!

*asked on March 7, 2019* -
## Calculus

How do I take the indefinite integral of (5-x)/(2x^2+x-1)? I've tried splitting it into two integrals and even completing the square on the bottom but neither of those led me anywhere. Help?

*asked on February 7, 2018* -
## Chemistry

A solution of ammonia and water contains 3.70×1025 water molecules and 7.10×1024 ammonia molecules. How many total hydrogen atoms are in this solution?

*asked on September 9, 2015* -
## Math

A custodian pours1/8 gallon of cleaning solution into each pail of water that she uses. how many pails of water and cleaning solution can the custodian make using 16 gallons of cleaning solution?

*asked on March 25, 2015* -
## math

Nathan deposited 7/9 of his allowance into his savings account. He spent the remaining amount, or $2.50. How much did Nathan deposit into his savings account? Should I multiply 7/9 *2 1/2 or 7/9 * 250

*asked on February 27, 2015* -
## Statistics

Service times for customers at a post office follow some right-skewed distribution with mean 2.91 minutes and standard deviation 1.74 minutes. (a) Can you calculate the probability that the average service time for the next two customers is less than 2.64

*asked on November 4, 2014* -
## Calculus

Find the value of a so that the tangent line to y = ln(x) at x = a is a line through the origin. I am unsure how to go about this.

*asked on October 19, 2014* -
## psychology

Leigh, B. C. (1993). Alcohol consumption and sexual activity as reported with a diary technique. Journal of Abnormal Psychology, 102, 490-493. doi:10.1037/0021-843X.102.3.490 This is the article to utilize when answering the questions 1. What are the

*asked on July 6, 2014* -
## PHS 105

At a particular instant, two asteroids in inter-stellar space are a distance r = 20 km apart. Asteroid 2 has 10 times the mass of asteroid 1, m2 = 10 m1. 1. If the acceleration of the asteroid 1 toward the asteroid 2 is 1.0 m/s2 , what is the acceleration

*asked on March 17, 2014* -
## Physics

After having collected samples along the shore all day long, a marine biologist walks back to her campsite, 3.02 km away. Her dog runs ahead, at twice the speed, reaches the campground and turns around until it meets her again. Then, the dog proceeds to

*asked on February 3, 2014* -
## accounting

1. Use the general journal to journalize the following transactions completed during July of the current year. 2. Post from the general journal to the general ledger. Using the following steps. a. A. Write the current year and July 1 in the Date column.

*asked on September 25, 2012* -
## Art

Hello, i am suppose to look at the artwork, Winged Genie Fertilizing a Date Tree. I have to identify the elements of art in this sculpture. I said the elements of art used in this sculpture are form, texture, shape, and line. Am i right? Did i leave

*asked on May 15, 2012* -
## Fine Arts

The question asks, What are some of the similarities and differences between scroll paintings in China and Japan. I have the similarities down, but i cant find any differences. Help?

*asked on May 6, 2012* -
## World History Honors

My assignment: Imagine that Sita, Mahavira, Siddhartha Gautama, Confucius, and Laozi were all invited to dinner at the home of Brahma. Write a 600-word dialogue between them as they argue about what they should eat for dinner and who should sit next to

*asked on August 24, 2011* -
## Algebra

x^2 + kx - 19 Find all values of k so that each polynomial can be factored using integers.

*asked on May 5, 2011* -
## CHEMISTRRY

What is the molarity of an HCl solution if 49.0 mL is completely titrated by 68.4 mL of an NaOh solution whose concentration is 0.333 M?

*asked on June 8, 2010* -
## chemistry

The concentration of various cations in seawater in moles per liter are Na+ (0.46M); Mg2+ (0.056M); Ca2+ (0.01M); Al3+ (4x10^-7M); Fe3+ (2x10^-7M) If enough OH- ion is added to precipitate 50% of the Mg2+, what mass of precipitate will be obtained from one

*asked on March 30, 2010* -
## MATH

Tara says that 1/2 of a salad is always the same amount. Lynn says that it could be different amounts, depending on how large the salad is. Who is correct? Why?

*asked on January 25, 2010* -
## eng

what is the primary focus of the nonintervention perspective

*asked on September 10, 2009* -
## comm

notation for subsequesnt multiple authors in a citation

*asked on March 20, 2009* -
## chemistry

caculate the number of moles in 8200 g of iron

*asked on March 16, 2009* -
## Algebra 1

"Solve each system algebraically. Identify each system as cosistent and dependent, cosistent and independant, or inconsistant." my teacher didn't go over this in class and i have no idea what it means! here are the problems: #1) 2f+3g=11 f-g=(-7) #2)

*asked on February 16, 2009* -
## english

While there may be opposition from students and parents, dress codes should be enforced in schools as they encourage discipline among students. This is my thesis statement for an essay :dress codes in schools". how can I support it with compelling

*asked on May 27, 2008* -
## chemistry

Using data from this chapter, calculate the change in energy expected for each of the following processes Rb(g) + Br(g) Rb+(g) + Br -(g)

*asked on December 7, 2007* -
## chem

calculate the change in energy expected for each of the following processes 1. Rb(g) + Br(g) --> Rb+ (g) + Br- (g) 2. Mg(g) + I(g) --> Mg+ (g) + I- (g) 3. Mg+ (g) + I(g) -> Mg+2 (g) + I- (g) 4. Mg(g) + 2I (g) -> Mg+2 (g) + 2I- (g) in kJ

*asked on December 6, 2007* -
## chem

Combustion reactions involve reacting a substance with oxygen. When compounds containing carbon and hydrogen are combusted, carbon dioxide and water are the products. Using the enthalpies of combustion for C4H4 (-2341 kJ/mol), C4H8 (-2755 kJ/mol), and H2

*asked on November 27, 2007* -
## chem

On Easter Sunday, April 23, 1983, nitric acid spilled from a tank car near downtown Denver, Colorado. The spill was neutralized with sodium carbonate. 2 HNO3(aq) + Na2CO3(s) 2 NaNO3(aq) + H2O(l) + CO2(g) (a) Calculate H° for this reaction. kJ

*asked on November 26, 2007* -
## chem

The specific heat capacity of silver is 0.24 J/°C·g. (a) Calculate the energy required to raise the temperature of 140.0 g Ag from 273 K to 295 K. J (b) Calculate the energy required to raise the temperature of 1.0 mol Ag by 1.0°C (called the molar heat

*asked on November 26, 2007* -
## chem

in the equation 2SO2 + O2 -> 2SO3 how do you find if work done is >,

*asked on November 20, 2007* -
## chem

A piece of solid carbon dioxide, with a mass of 6.2 g, is placed in a 4.0 L otherwise empty container at 21°C. ( a) What is the pressure in the container after all the carbon dioxide vaporizes? atm (.86 atm) (b) If 6.2 g solid carbon dioxide were placed

*asked on November 17, 2007* -
## dr. bob

Use the data in Table 5.4 to calculate the partial pressure of He in dry air assuming that the total pressure is 1.0 atm. Assuming a temperature of 21°C, calculate the number of He atoms per cubic centimeter. atoms/cm3 .00000524 - atmospheric composition

*asked on November 17, 2007* -
## chem

I have the following problems- write net ionic equations for reactions if no reaction write NR.... silver nitrate and ammonium carbonate sodium phosphate and potassium nitrate silver nitrate and barium chloride copper (II) chloride and sodium hydroxide

*asked on November 2, 2007* -
## FINANCE

Bond valuation Nungesser Corporation’s outstanding bonds have a $1,000 par value, a 9 percent semiannual coupon, 8 years to maturity, and an 8.5 percent YTM. What is the bond’s price?

*asked on September 18, 2007* -
## FINANCE

Current yield and yield to maturity A bond has a $1,000 par value, 10 years to maturity, a 7 percent annual coupon, and sells for $985. a. What is its current yield? b. What is its yield to maturity (YTM)? c. Assume that the yield to maturity remains

*asked on September 18, 2007* -
## physics

A person pushes a 10 kg box from rest and accelerates it to a speed of 3.2 m/s with a constant force. If the box is pushed for a time of 2.6 s, what is the force exerted by the person? force*time=mass*changeinvelocity solve for force.

*asked on December 16, 2006* -
## math/geometry

(use the law of sines) Solve triangle ABC if a=19, b=16, m

*asked on March 13, 2020* -
## Statistics

Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 10. Use the 68-95-99.7 rule to find out the percentage of scores less than 100

*asked on January 23, 2020* -
## stats

I need help. I am so so lost and need the answers and step by step if possible. I have tried everything but I think I'm just.. having a huge brainfart. I need the answers and the step by step please A quiz consists of 8 multiple choice questions, each with

*asked on August 5, 2019* -
## math stats

When 100 students at UCF were given a calculus problem that required the use of integration by parts, 95 were able to solve it. When 100 FAU students were given the same problem, 68 were able to solve it. What is the test statistic associated with the

*asked on August 5, 2019* -
## Physics

A 60 cm long wire is oriented from east to west directly above the equator and carries a current of 5 A (toward the east). What is the magnitude and direction of the magnetic force on this wire due to the earth’s magnetic field (30 µT oriented south and

*asked on July 24, 2019* -
## Science

A coach wants to find out the speed of the runners on the track team.Tell what simple equipment the coach need in order to do this and explain how it should be done.

*asked on January 21, 2018* -
## Pre-calculus

Can someone help me with this equation: y = (2*10^(-44))*(e^(0.055x))?

*asked on May 6, 2017* -
## economics

Explain why we might be concerned about the potential for the misrepresentation of costs.

*asked on March 16, 2017* -
## Social studies

Compare the experience of farmers,coal miners,and union labores during the 1920s. What did many have in common? 1.Economic prosperity 2. Public disapproval 3. Federal assistance 4. Financial hardship I choose A is it correct Ms. Sue

*asked on March 3, 2017* -
## Algebra

|3y+4|-|=0 Write in standard form

*asked on February 12, 2017* -
## Math

I am struggling with how to start this problem. The following points are on the graph of: y=f(x) Use theorem to identify the corresponding points on the transformed functions. y = 2f(x-3)-2

*asked on February 4, 2017* -
## algebra

A couple purchased a house in 2005. In 2009 the house appraised for $475,000. The couple refinanced the house in 2014 and the appraisal was $468,000. The couple determined a linear relationship existed between the the number of years since 2005 and the

*asked on February 4, 2017* -
## Social studies

Which of the following phrases might a Republican Congress have used to describe President Johnson's Reconstruction plans

*asked on January 24, 2017* -
## Math

Use long division to determine if the divisor is a factor of the dividend. (-x^2-94x+600)/(x+100)

*asked on January 22, 2017* -
## Physics

During takeoff, an airplane climbs with a speed of 180m/s at an angle of 42 degrees above the horizontal. The speed and direction of the airplane constitute a vector quantity known as the velocity. The sun is shining overhead. How fast is the shadow of the

*asked on September 14, 2016* -
## Language Arts

what is the participle or participial phrase in the following sentence: The art students, brought by bus, toured the museum.

*asked on March 29, 2016* -
## science

How can i prepare a 100ml, 0.1M phosphate buffer solution (pH = 7) out of Na2HPO4 and NaH2PO4

*asked on February 27, 2016*