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October 24, 2014

Posts by Melissa


Total # Posts: 1,120

health
why is having excessive abdominal fat a serious concern
September 20, 2012

O Chem
Comment on the suitability of running a infared spectrum under these conditions A KBr pellet is prepared with a compound that melts at 200 C same question but at 30 C
September 18, 2012

O chem
comment on suitability of running infared spectrum under the following conditions: A neat spectrum of liquid with a boiling point of 150 C is determined with salt plates. and same question but at 35 C
September 18, 2012

math
the final grade for a particular course is calculated by dividing total points earned by total points available. There are 6 quizzes worth 15 points each, and 2 exams worth 50 points each. If a student earns 67 points total on the quizzes and wants to get at least 86% in the ...
September 8, 2012

math
Evaluate f(x) = x^2+3-4 For f(1/4)
September 4, 2012

math
156 / 55 - how do i show my work for long division?
August 30, 2012

Art
thank you.
August 28, 2012

Art
Just a fast question. Im writing about Gothic stained glass windows, and was wondering if in the decorations on the windows was Christ depicted in them ?
August 28, 2012

algebra
Write a rule in words and as an algebraic expression to model the relationship in each table. The local video store charges a monthly membership fee of $5 and $2.25 per video. 1 video is $7.25 2 videos are $9.50 3 videos are $11.75
August 27, 2012

Algebra
Please help me with this algebra question?!?!?!? Find the discriminant of the equation in terms of p and q. Suppose q<p<0. Tell how many real solutions the equation has. px^2+qx-p I really need help with this math question! And indoor gym room consists of a rectangular ...
August 26, 2012

Math computation
8 9/15 - 1/2 = A.8 8/13 B.8 4/15 C.8 8/15 D.8 8/1 E. None of these A? 5/6 / 15= A. 1/2 B. 10 5/7 C. 18 D. 1/18 B?
August 15, 2012

math concepts and applications
Which of these is another way to write 11/50? A. 11% B. 22% C. 110% D. 220% A?
August 15, 2012

math concepts and applications
B?
August 15, 2012

math concepts and applications
A rectangle has a length of 6 meters and a perimeter of 20 meters. What is the width of the rectangle? A. 4 meters B. 7 meters C. 14 meters D. 52 meters C ?
August 15, 2012

math concepts and applications
What number completes this number sentence? 3x(5+8)= (3x5)+(__x8) F.3 G.5 H.15 J.24 F ?
August 15, 2012

math concepts and applications
What is the volume of a triangular prism that has a base area of 30 mm2 and height of 18 mm? (v=bh) A.48 mm3 B.96 mm3 C.270 mm3 D.540 mm3 A?
August 15, 2012

Math concepts and applications
B?
August 15, 2012

Math concepts and applications
which number sentence is true ? A.0.027 < 0.0027 B.0.0027 < 0.027 C.0.27 < 0.027 D.2.7 <0.27 D?
August 15, 2012

math
8 9 A)8 8/13 b)8 4/15 c)8 8/15 _ D)8 1/10 i think a 15 - 1 _ 2 _______
August 15, 2012

language expression
B?
August 14, 2012

language expression
9).Choose the sentence that has the same senetence pattern as the first sentence. She opened her book. A.George seemed pleased B.Tim strummed his guitar C.Sue is a superb athlete D.Grace wrote in her daily .......D?
August 14, 2012

vocbulary
Sorry I typed it wrong.. Is the Campsite ____ by car, or will we hike the last few miles? F.divisible G.applicable H.accessicable J.dispensable I got H ?
August 14, 2012

vocbulary
is the campsite ______ by car, or will we notice him. F)divisible G)applicable H)acessible J)dispenseable i think its h
August 14, 2012

vocabulary
zestFUL remorseFUL A) result of B)place for C)capable of D)filled with i think its c choose the word or phase that gives the best meaning of the underlined prefix or suffix.
August 14, 2012

ss
Women played important and diverse roles in the Mexican Revolution,Intellectuals,the Zapatista movement ,which have been largely overlooked by historians. In addition, these roles, in many cases, gave rise to post-Revolutionary feminist organizing. "The long-lasting ...
August 9, 2012

ss
Describe three social or economic reforms between 1917 and the 1930s that were a result of the mexican revolution? is this good enough.. Obregón, Álvaro, 1880-1928, president of MEXICO (1920-24). A successful general in the Mexican revolution (1910-17), he rose (...
August 9, 2012

English 3
A pronoun preceding a gerund is in the
July 25, 2012

statistics
How could you reword the research hypotheses below to null hypotheses?a. Smoking during pregnancy increases the risk of a child being born prematurely.
July 5, 2012

business
identify and explain the objectives of a supplier
June 30, 2012

pre-algebra
a math professor is teachin two classes. The first class has 100 student enrolled and the second class has 75 estudent enrolled if 3/4 estudent of the first class pass and 2/5 student of the second class pass. how many estydent pass in total
June 23, 2012

Calculus
determine where f(x)={x^2-5x+6/x-3, if x<3 {1/x-2, if x>3 is discontinuous.
June 19, 2012

physics
The distance between successive crests in a series of water waves is 5.0m; the crests travel 8.6m in 5.0s . Calculate the frequency of a block of wood bobbing up and down in the water
June 18, 2012

Finance
Aset P has a beta of 0.9. The risk-free rate of return is 8%, while the return on the S&P 500 is 14%. Asset P's required rate of return is:
June 17, 2012

physics
Some children go tobogganing on an icy hill. The start from the rest at the top of the hill. The toboggan and children have a combined mass of 94 kg. The height of the first hill a is 12.0m the height of b is 0, and the height of c is 3.0m. If friction is small enough to be ...
June 15, 2012

physics
Your English teacher can swim with a constant speed of 0.67m/s. While facing south , he attempts to swim straight across the St. Lawrence River , which moves east at 1.4 m/s a) find his velocity as seen from the riverbank. B) if the river was 175m wide How long does it take ...
June 14, 2012

physics
An object falls from the top of the school, which is 6.06m high. Assume air resistance can be ignored and the acceleration is 9.8m/s^2 If the object was dropped( not thrown) , what is its speed after 0.333s How long does it take to hit the ground
June 13, 2012

physics
A spring with a spring-constant 2.2 N/cm is compressed 28 cm and released. The 5 kg mass skids down the frictional incline of height 31 cm and inclined at a 18◦ angle. The acceleration of gravity is 9.8 m/s2 . The path is frictionless except for a distance of 0.8 m along...
June 12, 2012

physics
A spring with a spring-constant 2.2 N/cm is compressed 28 cm and released. The 5 kg mass skids down the frictional incline of height 31 cm and inclined at a 18◦ angle. The acceleration of gravity is 9.8 m/s2 . The path is frictionless except for a distance of 0.8 m along...
June 12, 2012

physics
A formula one car is moving at mach 0.16 when the temperature of the air is 20.0c. What is the speed of the car in kilometers per hour?
June 6, 2012

physics
A plane traveling at 260m/s has a speed of Match 0.80. What is the speed of sound in the air
June 6, 2012

physics
Assuming that the speed of sound at a certain altitude is 330m/s calculate the speed of an airplane that is traveling at match 4.2 ?
June 6, 2012

physics
Thank you
June 6, 2012

physics
The source of a wave generates 25 crests and 25 troughs in 5.0s, and the distance between two successive crests in that wave is 1.5 m . What is the speed of the waves
June 6, 2012

physics
The distance between the second and sixth crests in a wave is 75cm and one crest travels a distance of 25 cm in 3.0s . Find the frequency of the wave
June 6, 2012

physics
The second resonant length of an open air column is 48cm. Determine the first and third resonant lengths
June 5, 2012

physics
Could you please explain how you got that! The answer should be 20.0cm and I just don't understand
June 5, 2012

physics
What's the shortest air column , closed at one end, that will resonate at a frequency of 440.0Hz when the speed of sound is 352 m/s
June 5, 2012

physics
Thanks:)
June 5, 2012

physics
The first resonant length of a closed air column occurs when the length is 30.0cm . What will the second and third resonant lengths be
June 5, 2012

physics
The third resonant length of a closed air column is 75cm . What is the first and second length
June 5, 2012

physics
A car sounds its horn (502 Hz) as it approachs a pedestrian by the side of the road. The pedestrian has perfect pitch and determines that the sound from the horn has a frequency of 520 Hz. If the speed of sound that day was 340 m/s , how fast was the car travelling
June 4, 2012

physics
Assuming that the speed of sound at a certain altitude is 330m/s calculate the speed of an airplane that is travelling at (A) mach 0.70
June 4, 2012

physics
A ship is traveling in fog parallel to a dangerous , cliff-lined shore. The boat whistle is sounded and its echo is heard clearly 11.0 s later. If the air temperature is 10.0 c , how far is the ship from the cliff.
June 3, 2012

physics
Calculate the speed of sound wave in air if its frequencies and wavelengths are 256Hz and 1.32m
June 3, 2012

health
According to the AMA, what is the key reason behind a physicians duty of confidentiality to a patient? Thanks in advance!!!
June 2, 2012

statistics
Given a level of confidence of 99% & a population standard deviation of 10, answer the following: (A)What other information is necessary to find the sample size (n)? (B)Find the Maximum Error of Estimate (E) if n=77. show all work.
May 30, 2012

Chemistry
Calculate the mass of silver bromide produced from 22.5 g of silver nitrate in the following rxn: 2AgNO3(aq) + MgBr2(aq)-->2AgBr(s)+ Mg(NO3)2 (aq)
May 28, 2012

Math
The present value of the money in your savings acct is $420, and you're receiving 3% annual interest compounded monthly. What is the future value in 2 months?
May 27, 2012

american government
Unitary government
May 21, 2012

physics
A bell is rung at a sound intensity of 70dB . A trumpet is blown at an intensity that is greater by a factor of 10^3. What is the intensity level of the trumpet
May 20, 2012

physics
A vibrating 400.0Hz tuning fork is placed in fresh water. What is the frequencyin herbs and the wavelength in meters (A) within the water at 25c (B) when the sound waves move into the air at 25c
May 20, 2012

physics
A fan at a baseball game is 100.0m from the home plate. If the speed of sound is 350 m/s , how long after the batter actually hits the ball does the fan hear the crack? Assume that there is no wind.
May 20, 2012

physics
A 200m dash along a straight track was timed at 21.1 s by a timer located at the finish line who used the flash from the starters pistol to start the stopwatch. If the air temperature was 30.0c , what would the time have been if the timer had started the watch upon hearing the...
May 20, 2012

physics
How much time is required for sound to travel 1.4 km through air if the temperature is 30.0 c
May 20, 2012

physics
I tried that but it does not give me the correct answer which is 0.204 m/s
May 8, 2012

physics
The motor for an elevator can produce 2200 W of power. The elevator has a mass of 1100 kg complete with contents . At what constant speed will the elevator rise ?
May 8, 2012

physics
How much work can a 22 kW car engine do in 60 seconds if It is 30% efficient It is 100% efficient
May 8, 2012

physics
A boy fires a 60 g pebble with his slingshot. The pebble leaves the slingshot at 35m/s How high above the slingshot will the pebble rise if it's fired straight up?
May 8, 2012

Law
In law we watched a movie called 12 angry men , and there is a question I am stuck on, any help would be great! How does the film 12 angry men deepen our understanding of the guarantee of the right to trail by jury and the role of the jury system in America democracy? Thank ...
May 5, 2012

Life orientation
1: In 10-15 lines critically discuss 5 ways in which the human or environmental problem impacts on the community ( HIV AIDS ). 2: Provide recommendations on how to address HIV AIDS. Thank you!:-)
May 2, 2012

Life orientation
Poverty, pollution, hiv aids, nutrition, floods. Name two institutions or community organizations that are involved in supporting or giving redress to these disasters. Explain how these organizations are involved in providing a safe and healthy environment.
May 2, 2012

physics
A chair lift takes skiers to the top of a mountain that is 320 m high. The average mass of skiers complete with equipment is 85 kg . The chair lift can deliver three skiers to the top of the mountain every 36 s Determine the power required to carry out this task If friction ...
April 30, 2012

physics
An archer locks a 0.20kg arrow on a bowstring. Then the archer exerts an average force of 110N to draw the string back 0.60 m . Assume that friction is negligible . What speed does the bow give to the arrow? If the arrow is shot vertically upward,how high will it rise?
April 30, 2012

physics
two ropes are tied to a large boulder. one rope is pulled with a force of 400N due east. The other rope is pulled with a force of 300N due south. draw a vector diagram showing the forces
April 28, 2012

physics
A 6.0g pellet of lead at 32 degrees c gains 36.8 J of heat. What will be its final temperature
April 27, 2012

physics
A 50.0kg cyclist on a 10.0kg bicycle speeds up from 5.0m/s to 10.0m/s , the total kinetic energy before acceleratingis 750, and after acceleratingis 3000, how much work is done to increase the kinetic energy of the cyclist and the bicycle
April 27, 2012

Physics
HELP PLEASE. Hypothetically, you are standing on the balcony of an apartment on the 10th level of a building and you throw a ball at some angle, 0 , above the horizontal away from the building. the ball lands on the ground 10m from the building, 3.2s after it was thrown. the ...
April 26, 2012

physics
A 60 kg student does 60 push ups in 40s . With each push up , the student must lift 70% of the body mass a height of 40cm off the floor. Assuming two significant digits, calculate the following The work the student does against a force of gravity for each push up , assuming ...
April 25, 2012

Chemistry
If the acetylene were burned to form water and carbon dioxide, how many kilojoules of energy would be produced from the complete reaction of 20 of calcium carbide? CaC2(s)+2H2O(l) --> C2H2(g)+Ca(OH)2(s)
April 23, 2012

Chemistry
If the acetylene were burned to form water and carbon dioxide, how many kilojoules of energy would be produced from the complete reaction of 20 of calcium carbide? CaC2(s)+2H2O(l) --> C2H2(g)+Ca(OH)2(s)
April 23, 2012

Physics
Viscous blood is flowing through an artery partially clogged by cholesterol. A surgeon wants to remove enough of the cholesterol to double the flow rate of blood through this artery. If the original diameter of the artery is D , what should be the new diameter (in terms of D...
April 23, 2012

math
a rectangular field measures 20 meters by y meters is surrounded by grass patch of width 2 meters . What is the area of the grass patch ? Leave your answer in the simplest form in terms of y .
April 21, 2012

math
from one piece of wood , Sam cut two 9 1/2 in. strips for 2 sides of a frame. He cut two 11 3/4 in . strips each for the other 2 sides Sam had 5 1/2 in.of wood left. How long was the piece of wood when he started ?
April 18, 2012

math
1. Gina wants to begin by figuring out how long the corn bed will be. She knows that in her previous two gardens, she was able to plant 2 rows in a 5 foot long space and 5 rows in an 11 foot long space. Find a linear equation for the length of the bed (y) in which she can fit ...
April 16, 2012

statistics
20. Explain how the power of a hypothesis test is influenced by each of the following. Assume that all other factors are held constant. a. Increasing the alpha level from .01 to .05. b. Changing from a one-tailed test to a two-tailed test.
April 14, 2012

physics
Write the energy transformation equation for each situation Fireworks explodes An arrow is shot off a bow and flies through the air A paved driveway feels hot on a clear ,sunny day A camper raises an axe to chop a chunk of wood A lawn mower with a gasoline engine cuts a lawn
April 12, 2012

Physics
how does the slope of a Ff-Fg graph relate to the coefficients of friction , prove it mathematically.
April 12, 2012

physics
A 12 kg toboggan is pulled along at a constant velocity on a horizontal surface by a horizontal force of 11 N How much horizontal force is needed to pull the toboggan at a constant velocity if two 57 kg girls are sitting in it ?
April 10, 2012

science
a 40kg student goes to jupiter where the rate of acceleration is 24.5m/s squared what is the students weight on jupiter?
April 10, 2012

chemistry
Which of the following measures thermal energy in an object? (Points : 4) temperature mass heat volume
April 9, 2012

physics
A wagon is used to help deliver papers. There is a force applied at an angle of 25 degrees to the horizontal that causes the wagon to move a distance of 15m[N] in 10.0s from rest. There is a force of friction of 3.1 N acting on the 27kg wagon. What is the acceleration of the ...
April 9, 2012

Calculus
Verify if correct. Determine which line is parallel to the line with Cartesian equation 2x +3y + 5=0 a) r=(-1,-1) +s(2,3), seR b) x=3t-1, y=-2t-1, teR c) x=2t-1, 3t-1, teR d) none of the above. I chose D, none of the above because none of them are multiples of the given ...
April 7, 2012

Calculus
Explain fully please and thank you! =) Determine the point of intersection of the lines L1: r= (1,3,7) + s(1,2,-2),seR and L2: v=(0,2,-3) +t(1,1,4), teR. a) P(1,3,1) b P(1,3,7) c) The lines coincide d) no point of intersection
April 7, 2012

physics
Determine the magnitude of the force of gravity acting on a 340 kg satellite , 850 km above Earth's surface.
April 6, 2012

physics
A tug of war has started over a popular toy. One child pulls with a force of 2.0*10^1 N[W], a second child pulls with a force of 15N[N] and a third child pulls with a force of 4.0*10^1 N [30 S of E] calculate the net force on the toy
April 5, 2012

physics
If the coefficient of kinetic friction is 0.25 , how much horizontal force is needed to pull each of the following masses along a rough desk at a constant speed? A) 25 kg
April 5, 2012

physics
A 650 N student is Rollerblading at a velocity of 7.8 m/s [W] when the student trips and slides horizontally along the trail, coming to a stop 0.95s. Determine the students average acceleration
April 5, 2012

physics
Determine the magnitude of the force of gravity acting on a 340 kg satellite, 850 km above Earth's surface
April 5, 2012

physics
How do i find the acceleration though
April 4, 2012

physics
Given the following forces acting on an object find the net force: 2.0N[N], 10N[S], 2.0N[W], 8.0N[E] The mass is 5.1 kg with the net force find the objects acceleration
April 4, 2012

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