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July 7, 2015

Posts by gina


Total # Posts: 540

Physics
A solid ball of mass m and radius r rolls without slipping through a loop of radius R, as shown in the figure. From what height h should the ball be launched in order to make it through the loop without falling off the track? (Use any variable or symbol stated above along with...
October 22, 2010

Physics - Height of ball launch
A solid ball of mass m and radius r rolls without slipping through a loop of radius R, as shown in the figure. From what height h should the ball be launched in order to make it through the loop without falling off the track? (Use any variable or symbol stated above along with...
October 21, 2010

Physics
A uniform solid cylinder of mass M = 2 kg is rolling without slipping along a horizontal surface. The velocity of its center of mass is 27.6 m/s. Calculate its energy. I got 761.76 Joules but I think it's wrong.
October 21, 2010

Physics
At a county fair, a boy and two friends bring their teddy bears on the giant Ferris wheel. The wheel has a diameter of 14.0 m, the bottom of the wheel is 1.9 m above the ground and its rim is moving at a speed of 1.0 m/s. The boys are seated in positions 45° from each ...
October 14, 2010

Physics
A centrifuge in a medical laboratory rotates at an angular speed of 3500 rpm (revolutions per minute). When switched off, it rotates 70.0 times before coming to rest. Find the constant angular acceleration of the centrifuge. (Assume the initial direction of rotation is the ...
October 14, 2010

Physics
What is the centripetal acceleration of the Moon? The period of the Moon's orbit about the Earth is 27.3 days, measured with respect to the fixed stars. The radius of the Moon's orbit is RM = 3.85 · 108 m.
October 14, 2010

Physics
At a county fair, a boy takes his teddy bear on the giant Ferris wheel. Unfortunately, at the top of the ride, he accidentally drops his stuffed buddy. The wheel has a diameter of 14.6 m, the bottom of the wheel is 1.1 m above the ground and its rim is moving at a speed of 1.0...
October 14, 2010

Physics
Assuming that the Earth is spherical and recalling that latitudes range from 0° at the Equator to 90° N at the North Pole, how far apart, measured on the Earth's surface, are Copenhagen (55.67° N latitude), and Rome (41.90° N latitude)? The two cities lie ...
October 14, 2010

Physics
A man with a mass of 65 kg stands up in a 64-kg canoe of length 4.0 m floating on water. He walks from a point 0.75 m from the back of the canoe to a point 0.75 m from the front of the canoe. Assume negligible friction between the canoe and the water. How far does the canoe ...
October 14, 2010

algebra
How do I solve problems similar to: 2/3X - 1/2Y = 3
October 11, 2010

chemistry
The boiling point of water at 735mmHg is 99.073C. What mass of NaCl should be added to 3.11kg water to increase the boiling point to 100.000C. Kb for water = 0.510K kg mol-1.
October 11, 2010

math
you welcome :) glad i could help!
October 8, 2010

math
(6+6)/(6)*(6+6)=24
October 8, 2010

computers
i dont understand the formula for caluculating e^x in order to write the code(java)
October 8, 2010

computer science
I dont understand the formula :/ im writing in java
October 7, 2010

computer science
I dont understand the formula :/
October 7, 2010

computer science
Write an application that calculates the value of e^x by using the following formula:e^x=1+(x/1!)+(x^2/2!)+(x^3/3!)... Allow the user to enter the number of terms to calculate
October 7, 2010

stats
There are four major political parties in the country Treon. A public research group is interested in finding out whether there is any relationship between the party that is supported by a citizen of Treon and that citizen's socio-economic status. For the purposes of a ...
October 7, 2010

finance
cpu company currently pays a divdend of $2.50. dividends are expected to increase at the rate of $.25 per share for the next several years. determine the current rate of CPU's common stock to an investor who expects to be able to sell the stock for $35 per share after 3 ...
October 3, 2010

statistics
soo ive got the porpotion. Do i have to do anything with that or is that my answer???
September 29, 2010

statistics
on the table thingy... do i use 1.90 and 2??
September 29, 2010

statistics
but i cant find the proportion for a z-score of 1.98
September 29, 2010

statistics
The weights of individual nails produced by the 'Hammer 'n Nail' hardware company follow a normal distribution with the average nail weight being 5.1 grams and the standard deviation in nail weight being 1.6 grams. When a nail is produced it is discarded if it ...
September 29, 2010

Math
You are a share analyst for an investment firm and are investigating the return on shares in the Eastern Mining Corporation over the last four years. The return on Eastern Mining Corporation shares over the last four years is presented. Calculate the geometric mean rate of ...
September 28, 2010

Math
Supply the missing numbers. Round any decimal to the nearest thousandth and percent to the nearest tenth of a percent if necessary. fraction decimal percent 12percent
September 27, 2010

ghemistry
which indicator is more reliable in the titration of H3PO4 with NaOH using methyl orange and phenolphthalein as indicators
September 26, 2010

Physics
A small blimp is used for advertising purposes at a football game. It has a mass of 93.0 kg and is attached by a towrope to a truck on the ground. The towrope makes an angle of 53.3° downward from the horizontal, and the blimp hovers at a constant height of 20.7 m above ...
September 21, 2010

Physics
A horse draws a sled horizontally across a snow-covered field. The coefficient of friction between the sled and the snow is 0.195, and the mass of the sled, including the load, is 209.8 kg. If the horse moves the sled at a constant speed of 1.730 m/s, what is the power needed ...
September 21, 2010

Physics
A spring with a spring constant of 223.9 N/m is compressed by 0.220 m. Then a steel ball bearing of mass 0.0372 kg is put against the end of the spring, and the spring is released. What is the speed of the ball bearing right after it loses contact with the spring? (The ball ...
September 21, 2010

Physics
An ideal spring has the spring constant k = 464 N/m. Calculate the distance this spring must be stretched from its equilibrium position for 26 J of work to be done. 1
September 21, 2010

Physics
A particle of mass m is subjected to a force acting in the x-direction. Fx = (3.2 + 0.55x) N. Find the work done by the force as the particle moves from x = 0 to x = 4.5 m. 1
September 21, 2010

Physics
You push your couch a distance of 3.8 m across the living room floor with a horizontal force of 180.0 N. The force of friction is 136.0 N. What is the work done by you, by the friction force, by gravity, and by the net force? you 1 friction force 2 gravity 3 net force 4
September 21, 2010

Physics
Two baseballs are thrown off the top of a building that is 7.24 m high. Both are thrown with initial speed of 63.3 mph. Ball 1 is thrown horizontally, and ball 2 is thrown straight down. What is the difference in the speeds of the two balls when they touch the ground? (Neglect...
September 21, 2010

Physics
Two cars are moving. The first car has twice the mass of the second car but only half as much kinetic energy. When both cars increase their speed by 4.54 m/s, they then have the same kinetic energy. Calculate the original speeds of the two cars. first car 1 second car 2
September 21, 2010

maths
Yes, altitude change is what I am trying to find, sorry I didnt make that clearer earlier
September 20, 2010

maths
Yes, that's exactly i am looking for, sorry i didnt make that clear earlier
September 20, 2010

maths
hi how would you calculate altitude given airspeed, rate of descent and time? thank you!
September 20, 2010

Physics
The position of an object as a function of time is given as x = At3 + Bt2 + Ct + D. The constants are A = 3.2 m/s3, B = 1.8 m/s2, C = −4.2 m/s, and D = 7 m. At what time(s) is the object at rest?
September 10, 2010

Physics
A rabbit runs in a garden such that the x- and y-components of its displacement as function of times are given by x(t) = −0.44t2 − 6.0t + 73 and y(t)= 0.35t2 + 8.3t + 34. (Both x and y are in meters and t is in seconds.) (a) Calculate the rabbit's position (...
September 10, 2010

Physics
Some rental cars have a GPS unit installed, which allows the rental car company to check where you are at all times and thus also know your speed at any time. One of these rental cars is driven by an employee in the company's lot and, during the time interval from 0 to 10 ...
September 10, 2010

Physics
You serve a tennis ball from a height of 1.8 m above the ground. The ball leaves your racket with a speed of 19.4 m/s at an angle of 7.28° above the horizontal. The horizontal distance from the court's baseline to the net is 11.83 m, and the net is 1.07 m high. Neglect...
September 10, 2010

Physics
For a science fair competition, a group of high school students build a kicker-machine that can launch a golf ball from the origin with a velocity of 16.0 m/s and initial angle of 36.8° with respect to the horizontal. (a) Where will the golf ball fall back to the ground? (...
September 10, 2010

Physics
A golf ball is hit with an initial angle of 30.5° with respect to the horizontal and an initial velocity of 81.9 mph. It lands a distance of 86.8 m away from where it was hit. By how much did the effects of wind resistance, spin, and so forth reduce the range of the golf ...
September 10, 2010

accounting
What role might an accounting professional play in ethical corporate decision making? Should an accounting professional play a role even when he or she is not the final decision maker? Explain your answer.
September 9, 2010

mat115
A pack of 250 key blanks costs $23.50. What is the unit price? I know that this is .094 but I am having trouble with the remaining 2 parts. If each cut key costs a customer $1.75, and it takes 2 minutes for Darren to cut a key, how much does Darren make per hour? If Darren, as...
August 28, 2010

math
If a ball is dropped from from 288 ft above the ground, how long does it take to reach ground level?
August 26, 2010

math
A pack of 250 key blanks costs $23.50. What is the unit price? If each cut key costs a customer $1.75, and it takes 2 minutes for Darren to cut a key, how much does Darren make per hour? If Darren, as the business owner, pays himself $800 per week, how much profit (or loss) is...
August 26, 2010

Physics
A machine carries a 3.0 kg package from an initial position of di = (0.50 m) + (0.75 m) + (0.20 m) at t = 0 to a final position of df = (7.30 m) + (11.0 m) + (7.20 m) at t = 14 s. The constant force applied by the machine on the package is F = (2.00 N) + (4.00 N) + (6.00 N...
July 22, 2010

economics
how might these trade restrictions on imported goods affect the japanese economy
May 19, 2010

principles of management
memo to a superior indicating that person’s strengths as a manager. Include a tactful recommendation regarding one thing they could do differently to be even more effective as a manager.
May 17, 2010

environmental science
i would like to know what three consequences (one at each level: individual, community, and population) that may occur with each of these resources if these resources become limited.? The resources i came up with are water, food, shelter, resilinence, and humans. Ithink these ...
May 17, 2010

environmental science
yes i would love for some help on this.
May 17, 2010

college
List five resources you believe are needed for survival and discuss why they are needed for survival. If these resources become limited it may have an effect on the individual, community or population level. Discuss three consequences (one at each level: individual, community...
May 17, 2010

philosophy
Slippery Slope - Hitler and Saddam parallels "If you cannot recognize your enemy, you will not defeat him...."
May 11, 2010

economics
an accurate statement about the great depresson is
May 4, 2010

biology
Can someone please help me with the following question. Thanks! Skin color is not directly tied to race. All humans carry the same genes. Yet why do some races seem to have darker (or lighter) skin tones than others?
April 14, 2010

Physics
use: kmax = hf - e kmax = h ( f becomes : c over lambda)- e e = ( Evev * 1.6 *10exp -19)
April 13, 2010

1st grade
show 25 cents in several ways
April 8, 2010

African American History
Due to the long stretch of years of oppression and torture African Americans hae gone through in this country, they want reparation similarly to other groups including the Jews, Japanese, and the Native Americans. What solutions or strategies would you or could you provide to ...
April 8, 2010

physical science
What subdivisions make up the geologic time scale? What is the primary basis for differentiating the eras?
April 8, 2010

physics
Are fat fish more likely to have broad stripes than thin fish? 7. Answers: Yes No 8. Reasons: Some fat fish have broad stripes and some have narrow stripes. 3/7 of the fat fish have broad stripes. 12/28 are broad striped and 16/28 are narrow striped. 3/7 of the fat fish have ...
March 27, 2010

Science
Radioactive carbon-14 dating has determined that a fossil is 5.7 x 10 to the third power years old. What is the total amount of the original Carbon-14 still present in the fossil?
March 24, 2010

chemistry
need answer to the following: for each molecular compounds, write the name corresponding name or write chemical formula to: A)nitrogen pentasulfide B)diphosphorus pentasulfide C) AS2S3 D)PBr5
March 11, 2010

survey of accounting
The ______ interest rate is used to calculate the regular interest payments made to the bond holder.
March 8, 2010

7th grade math
1. 36/7= _ _ 2. -8-m>-19
March 5, 2010

math
8 * 10 to the fourth power in standard form
March 3, 2010

physics
A single conservative force acts on a 5.00 kg particle. The equation Fx = (2x + 4) N describes this force, where x is in meters. As the particle moves along the x axis from x = 1.40 m to x = 7.00 m, calculate the following.
February 23, 2010

Algebra 2
Find the LCD of 5/18x^2y^3,-3/24x^4y^5
February 23, 2010

Algebra
NO ONE CARES WHY YOU DONT LIKE IT DUUUHHH
February 17, 2010

kindergarten
what is a yarn counter
February 8, 2010

Finance 200
I need help on how to:Complete the Comprehensive Problem: Landis Corporation on p. 118 of Foundations of Financial Management
February 1, 2010

music
abrupt changes in dynamic levels are referred to as ----- dynamics?
January 1, 2010

Finance
You buy a very risky bond that promises a 9.5% coupon and return of the $1,000 principal in 10 years. You pay only $500 for the bond. You receive the coupon payments for 3 years and then the bond defaults. After liquidating the firm, the bondholders rece4ive a distribuion of $...
December 14, 2009

math
Find decimal and fractional notation for the percent notation in each sentence. Be sure to simplify fractions. They are based on a 2,000 calorie day. 1 ounce provides 9% of the mdv of fat
November 30, 2009

Trig
If sin^2X=A what is an algebraic expression in A for cos(2X). I have no idea where to even begin with this!
November 11, 2009

Eng/102
I'm having a hard time of putting my answers down and making the make sense. But after reading this assignment it will help me have a better understanding of my assignment
November 6, 2009

history
thanks ms. sue :D
November 1, 2009

history
how did canada become a peacekeeping nation? i wrote about lester b pearson is there another point?
November 1, 2009

Physics
A pilot of mass 65 kg in a jet aircraft makes a complete vertical circle in mid-air. The vertical circle has a radius of 1.70 km at a constant speed of 215 m/s. Determine the force of the seat on the pilot at (a) the bottom of the loop and (b) the top of the loop. (Note that ...
October 28, 2009

English
Like two seperate alliterations? If so, custard: Creamy custard can create culinary classics. elephant ear: Eager Elizabeth Eagleson eats elephant ears every evening. haha, hope those help?
October 28, 2009

Spanish
Help me unscamble these spanish words. rbaali mtirpaa proe rlaguer biecrisr tacarn bleriter Thanks!
September 28, 2009

Literature
Can someone help me?I have some literature homework to finish up but im kind of stuck on one.Can someone give me a sentence or paragraph with the word "audacity" in it?
September 24, 2009

Math
how do you know when you have found all the multiplication combinations for a cetain number?
August 25, 2009

Business
Posted by Gina on Monday, April 20, 2009 at 2:39pm. what is ethic of following situations? 1) A researcher plans to code questionnaries in an employee survey using invisible ink. 2) A researcher is planning to videotape users reactions to a new product in a simulated kitchen ...
April 21, 2009

business
what is ethic of following situations? 1) A researcher plans to code questionnaries in an employee survey using invisible ink. 2) A researcher is planning to videotape users reactions to a new product in a simulated kitchen environment from behind a one way mirror.
April 20, 2009

Latin
What is the latin word for normal? Is it normalia? I've been having a hard time finding it. Thanks
March 28, 2009

Careers
How do you become a font designer? What skills do you need, and how much do you get paid?
March 28, 2009

Psycology
Do you think valedictorians are more often left or right brain? Why? I hypothesized left brain, because I think logical skills are viewed over creative ones in the school system, but I wanted a second opinion. Most classes are based overall on logic, not creativity.
March 24, 2009

chemistry
In a study of the alcohol dehydrogenase catalysed oxidation of of ethanol at 25.0 C, the molar concentration of ethanol decreased in a first-order reaction from 220.0 mmol/L to 56.0 mmol/L in 1.22 x 104s. What is the rate constant of the reaction at 25.0 C?
March 11, 2009

Financial Management
Stock A has an expected return on 12 % and standard deviation of 40%. Stock B has an expected rate of return of 18% and a standard deviation of 60%. the correlation coefficient between stock A and B is 0.2 %. What are the expected rate of return and standard deviation of the ...
March 9, 2009

science
What is an Isogenerator?
February 21, 2009

Algebra
I am a bit confused about vertical asympotes. These two examples show different ways of getting asympotes. If I was to follow the first example to get the second example's asympote, it would not work out. Which example is correct, or are they both? 1. 2x/x^2-1 becomes ...
January 25, 2009

science
Why does air flow from high to low pressure?
January 19, 2009

7th grade
Why does air flowing down toward the Earth create high pressure?
January 19, 2009

phys
A plane takes off at St. Louis, flies straight to Denver, and then returns the same way. The plan flies at the same speed with respect to the ground during the flight, and there are no head winds or tail winds. Since the earth revolves around its axis once a day, you might ...
January 4, 2009

Math
I am having trouble remembering how to simplify fractions
December 1, 2008

1st grade
please help me with easy comments about sulpur and iron reaction
November 12, 2008

accounting
increase an asset and increase a liability : Purchased supplies on account. Increases supplies (asset) and increases accounts payable (liability). increase one asset and decrease another asset: Purchased supplies with cash. Increase supplies (Asset) decrease cash (Asset). ...
November 9, 2008

science
what is the chemical relationship between pectin and pectinase and is is caused by dehydrtions synthesis or hydroysis?
October 26, 2008

Gina to Reiny (logic)
thanks so much....I really appreciate your prompt response and so far your method makes the most sense to me...however why do you divide 1320 by 60, 15,12, and 20...and then 3, 4 ,5
October 17, 2008

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