# Nicole

Popular questions and responses by Nicole-
## physics

An object with mass 3.0 kg is attached to a spring with spring stiffness constant k = 300 N/m and is executing simple harmonic motion. When the object is 0.020 m from its equilibrium position, it is moving with a speed of 0.55 m/s. (a) Calculate the

*asked on March 7, 2012* -
## Math

A work crew of 3 people requires 3 weeks and 2 days to do a certain job. How long would it take a work crew of 4 people to do the same job if each person of both crews works at the same rate as each of the others? Note: each week contains six work days.

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

A tourist in France wants to visit 5 different cities. If the route is randomly selected, what is the probability that she will visit the cities in alphabetical order? Answer choice: a)120 b)1/5 c)1/120 d)1/25

*asked on April 15, 2010* -
## Buffer Solution

You have 500.0 mL of a buffer solution containing 0.30 M acetic acid (CH3COOH) and 0.20 M sodium acetate (CH3COONa). What will the pH of this solution be after the addition of 93 mL of 1.00 M NaOH solution?

*asked on April 13, 2011* -
## Chemistry

Calculate the standard enthalpy change for the reaction 2C8H18(l)+17O2(g)> 16CO(g) + 18H2O(l) Given 2C8H18(l)+25O2(g)>16CO2(g)+18H2O(l) deltaH=-11020 kj/mol 2CO(g)+ O2(g)>2CO2(g) Delta H=-566.0 kj/mol The > is supposed to be an arrow :)

*asked on November 17, 2011* -
## geometry

HELP.... In a certain lottery, 3 numbers between 1 and 9 inclusive are drawn. These are the winning numbers. How many different selections are possible? Assume the order in which the numbers are drawn is not important. Answer choice: a.) 6 b) 84 c) 504 d)

*asked on April 15, 2010* -
## Trig

A weight is oscillating on the end of a spring. The position of the weight relative to the point of equilibrium is given by y=1/12(cos8t-3sin8t), where y is the displacement (in meters) and t is the time (in seconds). Find the times when the weight is at

*asked on October 27, 2014* -
## statistics

A vending machine company wants to check three of its machines to determine if they are properly dispensing 12 ounces of coffee. Their data is given below. Reference: Ref 11-4 Compute the test value for the coffee machines. Answer 2.25 5.06 6.62 4.86

*asked on May 9, 2014* -
## music

trying to look for a 7 letter word using music notes cdeeffggaabb is this a damn trick question. best i can do is badge What about cabbage? you are a star, thank you so much

*asked on January 24, 2007* -
## math

a 12 cm by 16 cm picture is mounted with border of uniform width on a rectangular frame. if the total area of the border is 288 cm2, what is the length of the side of the frame?

*asked on July 21, 2015* -
## chemistry

At 23°C, Kp = 0.075 for the equilibrium: NH4HS (s) ↔ NH3 (g) + H2S (g) A sample of solid NH4HS is placed in a closed vessel and allowed to equilibrate. Calculate the equilibrium partial pressure (atm) of ammonia, assuming that some solid NH4HS remains.

*asked on September 14, 2012* -
## Chemistry

An analysis of nicotine (MW = 162 g/mol) gives 74.0% carbon, 8.65% hydrogen, and 17.3% nitrogen. What is the TRUE (MOLECULAR) formula for nicotine? All I need are the formulas!!

*asked on September 16, 2015* -
## Buffer

You have 500.0 mL of a buffer solution containing 0.30 M acetic acid (CH3COOH) and 0.20 M sodium acetate (CH3COONa). What will the pH of this solution be after the addition of 93 mL of 1.00 M NaOH solution?

*asked on April 11, 2011* -
## Chemistry HELP

What is the velocity of an electron that has a de broglie wavelength approximately the length of a chemical bond? Assume this length to be 1.2 X10^-10 m.

*asked on September 5, 2015* -
## Algebra 2

A large asteroid crashed into a moon of a planet, causing several boulders from the moon to be propelled into space toward the planet. Astronomers were able to measure the speed of one of the projectiles. the distance (in feet) that the projectile traveled

*asked on February 18, 2015* -
## algebra

The size of the coyote population at a national park increases at the rate of 4.6% per year. If the size of the current population is 130, find how many coyotes there should be in 6 years. Use the function f(x)=130e^0.046t

*asked on April 15, 2016* -
## physics

The combined mass of a race car and its driver is 600. kilograms. Traveling at a constant speed, the car completes one lap around a circular track of radius 160 meters in 36 seconds. A) Based on the given information, calculate the speed of the car. B)

*asked on January 10, 2010* -
## Chemistry

What is the mass of ethylene gycol dissolved in 5.00 kg of a 40.0% solution?

*asked on May 4, 2013* -
## Middle School Math

The marching band is selling cases of fruit for $13 per case. a. Write an algebraic expression for the cost of f cases of fruit. b. Evaluate the expression for 250 cases. Question 17 options:

*asked on October 7, 2015* -
## English

Identify the italicized part of the sentence. The main event will be a memory contest. subject predicate direct object indirect object predicate noun predicate adjective

*asked on October 30, 2014* -
## Math... PLEASE HELP!!

If one angle in a pair of vertical angles measures 42 degrees and the other measures 2n-4 degrees, which is the value of n? I got 23 degrees but I am not sure if it is correct. Please help me...

*asked on November 12, 2013* -
## physics

A student sits on a freely rotating stool holding two weights, each of which has a mass of 3.00 kg. When his arms are extended horizontally, the weights are 1.00 m from the axis of rotation and he rotates with an angular speed of 0.750 rad/s. The moment of

*asked on December 5, 2006* -
## physics

a water balloon launcher with a mass of 4 kg fires a .5 balloon with a velocity of 3m/s to the east. what is the recoil velocity of the launcher?

*asked on March 10, 2014* -
## Chemistry

What mass of octane must be burned in order to liberate 5510 kJ of heat? ΔHcomb = -5471 kJ/mol.

*asked on March 26, 2011* -
## Science

An object is placed 37.5 cm in front of a concave mirror with a radius of curvature of 75 cm. Describe the characteristics of the image in using GRESA form

*asked on September 10, 2018* -
## Intro to Computers

You are setting up a desktop computer for an AutoCad specialist who needs a minimum of 125 GB of RAM. Which operating system below would be best-suited for his needs? A. Windows 8 Home 64-Bit Edition B. Windows XP 32-Bit Professional Edition C. Windows

*asked on January 13, 2014* -
## Physics

No glass is perfectly transparent. Mainly because of reflections, about 92% of light passes through an average sheet of clear windowpane. The 8% loss is not noticed through a single sheet, but through several sheets it is apparent. How much light is

*asked on November 28, 2012* -
## Statistics

A retail shop accepts only cash or checks. Suppose that 54% of its customers carry cash, 51% carry checks, and 71% carry cash or checks (or both). What is the probability that a randomly chosen customer at the shop is carrying both cash and checks?

*asked on October 22, 2011* -
## ap statistics

In a survey, 600 mothers and fathers were asked about the importance of sports for boys and girls. Of the parents interviewed, 70% said the genders are equal and should have equal opportunities to participate in sports. B. Using the normal approximation

*asked on April 24, 2014* -
## 6 Entropy

Using the thermodynamic data provided below, calculate the standard change in entropy when one mole of sodium nitrate is dissolved in water? S° (J/K•mol) NaNO3(s) 116.3 Na+(aq) 60.25 NO3–(aq) 146.4 Using the value you calculated, how will the

*asked on May 3, 2011* -
## Physics

A large crate filled with physics laboratory equipment must be moved up an incline onto a truck. 1. The crate is at rest on the incline. What can you say about the force of friction acting on the crate? a. The friction force point up the include b. The

*asked on September 22, 2008* -
## Calculus

Use normal vectors to determine the intersection, if any, for each of the following groups of three planes. Give a geometric interpretation in each case and the number of solutions for the corresponding linear system of equations. If the planes intersect

*asked on July 9, 2008* -
## World history

Which of the following did NOT contribute to an increase in food production and population growth during the Middle Ages? A) the invention of the ox collar B) a climate change C) a heavy, wheeled plow with an iron plowshare D) a three-field system of crop

*asked on December 4, 2017* -
## Chemistry

How many atoms of mercury are present in 3.2 cubic centimeters of liquid mercury? The density of mercury is 13.55 g/cc. Answer in units of atoms.

*asked on September 16, 2015* -
## English, Written Communication

Which of the following are examples of coordinate headings? A. 3, b, iii B. A, i, a C. ii, 2, B D. A, B, C My answer was C but i got it wrong, is it A? PLEASE HELP CANT FIND IT IN MY TEXT BOOK

*asked on May 22, 2015* -
## Optimization Calculus

A three sided fence is to be built next to a straight section of river, which forms the fourth side of a rectangular region. There is 96 ft of fencing available. Find the maximum enclosed area and the dimensions of the corresponding enclosure. I drew a

*asked on May 2, 2015* -
## physics

The position of an object as a function of time is given by x = At2 – Bt + C, where A = 7.3 m/s2, B = 5.8 m/s, and C = 4.5 m. Find the instantaneous velocity and acceleration as functions of time. (Use the following as necessary: t.) help!!!!!!!!! thank

*asked on August 28, 2012* -
## science

if 1000 grasshoppers weigh kg how much does one grasshopper weigh?

*asked on July 21, 2010* -
## math

A physical fitness association is including the mile run in its secondary-school fitness test. The time for this event for boys in secondary school is known to possess a normal distribution with a mean of 450 seconds and a standard deviation of 40 seconds.

*asked on April 16, 2010* -
## math, calculus

if f(1)=12 and f' is continuous, what is the value of f(4)? integral from 1 to 4 of f'(x)dx = 17 IF the integral of f'(x) dx from 1 to 4 is 17, as you say, then the function f(x), which is the integral with an arbitrary constant, changes by 17 from 1 to 4.

*asked on November 27, 2006* -
## Algebra

A bakery packages cookies in two sizes of boxes, one with 18 cookies and the other with 24 cookies. A small number of cookies are to be wrapped in cellophane before they are placed in a box. To save money, the bakery will use the same size cellophane

*asked on April 23, 2012* -
## geometry

How many 5 card poker hands consisting of 3 aces and 2 kings are possible with an ordinary 52-card deck? Answer choice: a).12 b).288 c).6 d).24 I got 24 is that correct?

*asked on April 15, 2010* -
## Math

How do you write 2.78 in expanded form

*asked on November 14, 2009* -
## Chemisrty Lab

dimensions of a concrete pile are 14 inchesx14 inches x 15 feet. (1 meter=3.28 feet) the pile has 4 faces and 2 ends. 1>what is the surface area in square feet, of a single pile? exclude the ends of the pile. 2>What is the total surface area in square

*asked on September 11, 2007* -
## Language Arts

"Type a paragraph in which you use at least two linking commas, two semicolons, and one colon." Does the paragraph below match the criteria above? My dog, Bruno, is absolutely amazing; he's so many things for a one year old Miniature Pinscher: funny,

*asked on November 16, 2015* -
## algebra

a swimming pool is 60 ft long and 35 ft wide. a model of the pool is 9 in long. how wide is the model

*asked on November 16, 2015* -
## math

Janet bought 1/2 cake. She ate 1/4 of the cake she bought. Then she cut the remainder into 2 equal pieces. What fraction of a whole cake was each piece?

*asked on December 1, 2014* -
## Algebra

what is the inverse of the linear parent function? How would you graph the inverse and what are the values for the inverse???

*asked on December 16, 2013* -
## Calculus - Volume by Integration

Find the volume of the solid generated by revolving the region bounded by the given lines and curves about the y-axis: y=(x-2)^3-2, x=0, y=25 (a)solve by either the disk or washer method (b)solve by the shell method (c)state which method is easiest to

*asked on November 24, 2013* -
## math

For her vacation Mrs. Andrews bought $300 worth of traveler's checks in $10 and $20 denominations. If she has 22 travelers checks in all, how many of each denomination does she have? Let x represent the number of $10 traveler's checks she has. Which

*asked on August 20, 2012* -
## bio

Homozygous dominant for BRCA1-what is the genotype? (using the letter b)

*asked on November 19, 2011* -
## Chem

State the hazard warning label that should be shown on a jar of oxygen.

*asked on October 5, 2011* -
## Chemistry

Why wouldn't HCl be a good acid to use to determine the solubility of a silver precipitate in acid solution?

*asked on April 12, 2011* -
## Chemistry

If the specific rotation of Compound X is (-) 123.8º, what would be the observed rotation of its enantiomer, Compound Y, assuming the concentration and cell path length is the same? b. If a racemic mixture of Compound X and Compound Y were analyzed, what

*asked on March 31, 2011* -
## Stats

Exercise 6-8 The Downtown Parking Authority of Tampa, Florida, reported the following information for a sample of 235 customers on the number of hours cars are parked and the amount they are charged. Number of Hours Frequency Amount Charged 1 18 $3 2 33 7

*asked on September 28, 2010* -
## physics

1. Measurements show that there is an electric field surrounding the Earth. Its magnitude is about 100 N/C at the Earth's surface and points inward toward the Earth's center. From this information, can you state whether the Earth is negative or positive?

*asked on July 15, 2010* -
## algebra

a chemist mixes an 11% alchohol solution with an 8% alchohol solutoins. How many milliliters of each solution should he use to make a 600ml solution that is 8% alchohol solution? Why wouldn't we just use 600ml of the 8% solution to begin with? So 0ml of

*asked on September 12, 2006* -
## math

Two circles of radii 9cm and 13cm have their centres 15cm apart. Find the angle between the radii joining the centres to the points of intersection of the circles. Hence find the overlapping area between the two circles. - (Been struggling with this

*asked on March 10, 2016* -
## Chemistry

Calculate the number of moles of carbon atoms present in 1.1 g of ethanol (C2H6O). Answer in units of mol.

*asked on September 16, 2015* -
## College Physics

A rope can withstand a maximum tension force of 500N before breaking. If we use the rope to pull a 24 kg bucket of water from a well, what is the maximum acceleration upward we can use without breaking the rope?

*asked on February 6, 2015* -
## english

In "Why, You Reckon?" what argument does the other man use to convince the narrator to team up with him? What lesson do you think the narrator learned by the end of the evening? I have part of the answer but I don't now how to put it in ACE format.

*asked on January 23, 2015* -
## Physics

A golfer, putting on a green, requires three strokes to "hole the ball." During the first putt, the ball rolls 5.9 m due east. For the second putt, the ball travels 2.4 m at an angle 20° north of east. The third putt is 0.50 m due north. What displacement

*asked on June 26, 2014* -
## physics

robin is standing terrified at the end of a diving board, which is high above the water. if robin has a mass of 75 kg and is standing .6m from the board's pivot point, what torque is robin exerting on the board

*asked on April 22, 2014* -
## Finance

The ________ model is usually considered the best of the capital budgeting decision-making models. A) Internal Rate of Return (IRR) B) Discounted Payback Period C) Profitability Index (PI) D) Net Present Value (NPV) Is the correct answer D. (NPV)

*asked on January 23, 2014* -
## American Revolution

What did the Colonial boycotts of British goods before the Revolutionary War were effective measures. I wanted to say It lowered the prices of imported goods but I had second thoughts and thought It reduced the profits of British merchants.. Please help me

*asked on May 26, 2013* -
## chemistry

How many osmoles are there in 6.00 ML of a 6.0 N mg3(po4)2 solution?

*asked on December 5, 2012* -
## PHYSICS

An artillery shell is fired with an initial velocity of 300m/s at 55 degrees above horizontal. To clear an avalanche, it explodes on a mountainside 42.0s after firing. What are the x and y coordinates of the shell where it explodes, relative to its firing

*asked on September 6, 2012* -
## geometry

If all of the diagonals are drawn from a vertex of a quadrilateral, how many triangles are formed?

*asked on April 20, 2012* -
## Physics

A 12 g bullet is fired horizontally into a 96 g wooden block initially at rest on a horizontal surface. After impact, the block slides 7.5 m before coming to rest. If the coefficient of kinetic friction between block and surface is 0.60, what was the speed

*asked on January 5, 2012* -
## Math

write numeral as hindu- arabic numeral _ XMMDCLXII

*asked on May 14, 2011* -
## chemistrty

A sample containing 7.20g O2 gas has a volume of 33.0L Pressure and temperature remain constant. What is the volume after 4.00g He is added to the O2 gas already in the container?

*asked on April 8, 2011* -
## Math

Eve:"Doris and I are twins" Ann: "Doris and Eve are not twins" Doris: "Ann and I are not twins" Who are the twins?

*asked on August 26, 2010* -
## physics

1. At some automobile toll-collecting stations, a thin metal wire sticks up from the road and makes contact with cars before they reach the toll collector. What is the purpose of this wire? 2. The leaves of a charged electroscope collapse in time. At

*asked on July 14, 2010* -
## 9th grade

why did miss muffet need a road map

*asked on October 8, 2008* -
## Psychology

What is another name for a pretty part of a flower? ( NOT BLOOM) What are the male and female parts of a flower? (LIST THE NAMES) Thank you!

*asked on September 6, 2008* -
## maths

A Baker uses 2/3 of a bag of flour to make 6 muffins how many bags of flour will he need to make 48 muffins

*asked on January 13, 2020* -
## Ancient History

Which effect did continued trade with Egypt have on Kush civilization? A. Kushites adopted many elements of Egyptian culture. Correct answer B. Kushites learned to navigate the Nile River. Incorrect answer C. Kushites stopped trading with other African

*asked on November 27, 2019* -
## Science

What is the molecular structure of methylated spirits

*asked on May 1, 2019* -
## Philosophy

Explain and critically evaluate Parmenides’ arguments that being is unitary, undifferentiated, and eternal. i am really stuck on this question, could someone help me better understand

*asked on September 27, 2018* -
## math

how many positive 4-digit numbers are there with an even digit in the hundreds position and an odd digit in the tens position? a. 10,000 b. 5,040 c. 2,500 d. 2,250

*asked on September 3, 2018* -
## Physics

The horizontal surface on which the block slides is frictionless. The speed of the block before it touch the spring is 6.0 m/s. How fast is the block moving at the instant the spring has been compressed 0.15 m? The spring constant, k = 2000 N/m

*asked on February 26, 2017* -
## Chemistry

For the reaction 2 NO (g) + Cl2 (g) → 2 NOCl (g) If the concentration of NO is tripled, the rate of the reaction increases by a factor of nine. If the concentration of Cl2 is cut in half, the rate of the reaction is decreased to half the original rate.

*asked on April 17, 2016* -
## Geometry

The contrapositive of the following conditional statement: If a figure has four sides, then it is not a triangle. A.If a figure does not have four sides, then it is a triangle. B.If a figure is a triangle, then it does not have four sides. C.If a figure is

*asked on December 15, 2015* -
## chemistry

why does water,oil,acetone and isopropanol have the same concave meniscus shape?

*asked on May 25, 2015* -
## `Statistics

A public relations firm found only 9% of voters in a certain state are satisfied with their US senators. How large a sample of voters should be drawn so that the sample proportion of voters who are satisfied with their senators is approximately normally

*asked on March 26, 2014* -
## English

What is the definition for "Vague Optimism"?

*asked on December 17, 2013* -
## Math

One of two complementary angles has a measure that is five times that of the other. Which equation could be used to find x, the degree measure of the smaller angle? A) 5x=90 B) x+5x=90 C) 5x=180 D) x=5x=180 I chose A but I wasn't sure if I was correct.

*asked on November 12, 2013* -
## History/Economics..PLEASE HELP!!

Plato, a Greek philosopher who lived from 427BC to 347BC, famously wrote that, "Necessity is the mother of inventions." Do you agree with this statement? Why or why not? My response was, " I agree with this statement because most of the inventions from the

*asked on October 25, 2013* -
## History/Economics

Plato, a Greek philosopher who lived from 427 BC to 347BC, famously wrote that, "Necessity is the mother of invention." Do you agree with this statement? Why or why not?

*asked on October 24, 2013* -
## math

chris put $1,500 in a savings account at an annual interest rate of 5%. If chris does not deposit or withdraw any money, what is the amount of interest chris will earn the first year her money is in the savings account? use the formula i=prt

*asked on August 4, 2013* -
## Physics

A parallel plate capacitor with plate separation d is connected to a battery. The capacitor is fully charged to Q Coulombs and a voltage of V. (C is the capacitance and U is the stored energy.) Answer the following questions regarding the capacitor charged

*asked on February 14, 2013* -
## Physics

A parallel plate capacitor with plate separation d is connected to a battery. The capacitor is fully charged to Q Coulombs and a voltage of V. (C is the capacitance and U is the stored energy.) Answer the following questions regarding the capacitor charged

*asked on February 14, 2013* -
## math

What 3 digit number can be written as 45 tens

*asked on September 27, 2012* -
## chemistry

the equilibrium system shown below was analyzed and the concentrations of HI(g, and I2(g) were found, in mol/L, to be 4.4, 3.2, 1.5 respectively. the equilibrium constant must be which f the following? H2(g) + I2(g) 2HI(g) + 65KJ

*asked on May 5, 2012* -
## Algrbra I

Help!! I do not understand how to work these types of problems. My instructor gives us really long formulas and charts for these and i don't get it!! Im good at algebra, I have an A in the class, so this is irritating to me! The radiator in a certain make

*asked on February 8, 2012* -
## math

why do oyu change the last two signs when subtracting two negative numbers?

*asked on December 17, 2011* -
## english

A good strong thesis statement about the children's book Corduroy by Don Freeman

*asked on October 20, 2011* -
## social studies

what is the constitution

*asked on September 16, 2011* -
## trig

give and exact value for cos(2pi/3)

*asked on March 6, 2011* -
## Reading

How do i write my cat leaped onto my stomach in the middle of the night correctly?

*asked on February 3, 2011*