Wednesday
May 27, 2015

Posts by megan


Total # Posts: 974

chemistry
arrange these seven substances in order from highest melting point to lowest melting point. H2O, MgO, CCl4, CH2Cl2, CaCl2, N2, PF3
February 3, 2011

intermolecular forces
arrange these seven substances in order from highest melting point to lowest melting point. H2O, MgO, CCl4, CH2Cl2, CaCl2, N2, PF3
February 3, 2011

Physics
A helicopter is ascending vertically with a speed of 4.50 m/s. At a height of 65 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground? [Hint: The package's initial speed equals the helicopter's.]
February 1, 2011

Physics please help!!
A car starts from rest and travels for 5 seconds with a uniform acceleration of 2m/sec^2. The driver then applies the breaks causing a deceleration of 1.5m/sec^2. If the breaks are applied for 4 second, how fast is the car going after the breaking period?
January 31, 2011

Physics
A horse canters away from its trainer in a straight line, moving 160 m away in 12.0 s. It then turns abruptly and gallops halfway back in 4.5 s. (a) Calculate its average speed.m/s (b) Calculate its average velocity for the entire trip, using "away from the trainer" ...
January 30, 2011

Physics please help!!
A mass M is initially at rest on a horizontal surface, μs=0.30 and μk=0.20 . A horizontal string then pulls M with a tension T. Forces below are magnitudes. Indicate if each statement is correct or incorrect If M does not accelerate, then T ≤ μsN M will ...
January 30, 2011

Physics please help!!
Those answers are coming up as wrong too. This problem is really frustrating me. I don't know what else to do.
January 30, 2011

Physics please help!!
I have already and the answers I submit is wrong. If M does not accelerate, then T ≤ μsN I M will accelerate if T exceed μsN I The NET force on M (if M does not move) is T C N equals Mg C T equals μsN if M remains at rest C M will accelerate if T exceeds...
January 30, 2011

Physics please help!!
A mass M is initially at rest on a horizontal surface, μs=0.30 and μk=0.20 . A horizontal string then pulls M with a tension T. Forces below are magnitudes. Indicate if each statement is correct or incorrect If M does not accelerate, then T ≤ μsN M will ...
January 30, 2011

Word within the word list 9
what are the answers to vulpine:porcine:: clever:gluttonous fox:grapes telegraph:photograph ignominious:glorious Please respond asap thanks!
January 30, 2011

English
Thank you, I made an 88.2 :)
January 28, 2011

English
I forgot to put the answers that I thought, but there they are :)
January 28, 2011

English
Sorry, C A C D A C A D A C A A C C D D C
January 28, 2011

English
Works such as "To Build a Fire" gave Naturalist writers such as Jack London a platform to argue that (Points : 5) human wisdom ingenuity can solve all problems. life in the woods is fun and easy. natural forces are powerful and unpredictable and deserve respect. the...
January 28, 2011

Physics
M2 is supposed to be hanging down from the pulley
January 27, 2011

Physics
Two blocks are arranged as shown. The pulley can be considered to be massless, and friction is negligible. M1 is four times more massive than M2. M1--->0(Pulley) V V (down direction) V M2 If the system is released from rest, how far will M1 travel in 0.523 s?
January 27, 2011

Physics please help!!
Oh gosh, can't believe I misread that. Thank you.
January 27, 2011

Physics please help!!
How do I find the time? How is 90.0 m/s converted to seconds? Isn't that what I need to plug into the quation?
January 27, 2011

Physics please help!!
A man with mass m =96.4 kg (weight = 212.1 lbs is walking towards a patio at 2.00 m/s (4.47 mph) when, at the last moment, he realizes the sliding glass door is closed. He puts out his hand suddenly to stop himself, and comes to a halt in 90.0ms. Find the magnitude of the ...
January 27, 2011

Physics
A man with mass m =96.4 kg (weight = 212.1 lbs is walking towards a patio at 2.00 m/s (4.47 mph) when, at the last moment, he realizes the sliding glass door is closed. He puts out his hand suddenly to stop himself, and comes to a halt in 90.0ms. Find the magnitude of the ...
January 26, 2011

Physics
A 43.3 kg boy and a 60.0 kg girl are on the surface of a frozen lake, 10.5 m apart. Using a rope, the boy exerts a horizontal 5.90 N force on the girl, pulling her toward him. Calculate the magnitude of the boy's acceleration.
January 25, 2011

Physics please help!!
A 43.3 kg boy and a 60.0 kg girl are on the surface of a frozen lake, 10.5 m apart. Using a rope, the boy exerts a horizontal 5.90 N force on the girl, pulling her toward him. Calculate the magnitude of the boy's acceleration.
January 25, 2011

Physics
One of the fastest recorded pitches major-league baseball, thrown by Nolan Ryan in 1974, was clocked at 100.8 mi/hr. If a pitch were thrown horizontally with this velocity, how far would the ball fall vertically by the time it reached home plate 60.0 ft away?
January 23, 2011

Physics please help!!
A quarterback takes the ball from the line of scrimmage, runs backward for 11.1 yds, then runs sideways parallel to the line of scrimmage for 17.8 yds. At this point, he throws a 52.7 yd forward pass straight downfield, perpendicular to the line of scrimmage. What is the ...
January 23, 2011

science
how many different elements are bonded to carbon in the molecule of luminol?
January 23, 2011

Science
They are in the same group of 16. oxygen has 6 valence electrons selenium has also has 6
January 23, 2011

Help! Physics!
A person walks 23o north of east for 4.8 km. How far would a person walk due north and due east to arrive at the same location.
January 23, 2011

Physics please help!!
A peregrine falcon dives at a pigeon. The falcon starts downward from rest and falls with free-fall acceleration. If the pigeon is 82.8 m below the initial position of the falcon, how long does it take the falcon to reach the pigeon? Assume that the pigeon remains at rest.
January 23, 2011

Physics
A peregrine falcon dives at a pigeon. The falcon starts downward from rest and falls with free-fall acceleration. If the pigeon is 82.8 m below the initial position of the falcon, how long does it take the falcon to reach the pigeon? Assume that the pigeon remains at rest.
January 23, 2011

Physics
A ball is thrown directly downward, with an initial speed of 6.10 m/s, from a height of 31.0 m. After what interval does the ball strike the ground?
January 23, 2011

Physics
A ball is thrown directly downward, with an initial speed of 6.10 m/s, from a height of 31.0 m. After what interval does the ball strike the ground?
January 23, 2011

Physics
A ball is thrown vertically upwards with an initial velocity of 27.0 m/s. Neglecting air resistance, how long is the ball in the air?
January 23, 2011

Physics
A ball is thrown vertically upwards with an initial velocity of 27.0 m/s. Neglecting air resistance, how long is the ball in the air?
January 23, 2011

physics
A trapeze artist, starting from rest, swings downward on the bar, lets go at the bottom of the swing, and falls freely to the net. An assistant, standing on the same platform as the trapeze artist, jumps from rest straight downward. Friction and air resistance are negligible...
January 19, 2011

Chemistry
a. 12
January 19, 2011

math
Use the digits 0,2,4,5,6 and 8 to write two money amounts that you can subtract by trading 1 dime for 10 pennies. Then solve.
January 18, 2011

physics
A 3.20 kg block is pushed along the ceiling with a constant applied force of 85.0 N that acts at an angle of 55.0° with the horizontal. The block accelerates to the right at 7.50 m/s2. Determine the coefficient of kinetic friction between block and ceiling. Would ...
January 18, 2011

Physics
The speed of a vehicle is 3.56 meters per second. Select from the list below all of the answers which express that speed and which are formatted so that CAPA can judge the answer [* means multiply, ^ means raise to a power, / means divide]. (Entering the NUMERICAL VALUE and ...
January 11, 2011

Physics
Calculate the volume of a spherical balloon which has a surface area of 0.0793 m2
January 11, 2011

Civics and Economics
what is the purpose of a fillibuster
January 10, 2011

Pre-Algebra
Mistu purchased a basketball hoop for her driveway from a sporting goods store. After the sales tax rate of 5.5% was applied, the total cost came to $179.35.How much money would Mistu have saved if she had used a coupon good for 10% discount?
January 6, 2011

3rd grade social studies
what is Acropolis and where was Acropolis? Thanks!
January 4, 2011

3rd grade social studies
what is agora
January 4, 2011

3rd grade social studies
geography why were seas important on the continent of Europe? What were seas used for? Please help! Thanks.
January 4, 2011

Chemistry
Determine the mass of phosphoric acid that can be produced by the reaction of 1 ton of phosphate rock, Ca(PO4)2, and sulfuric acid.
January 2, 2011

Chemistry
Determine the mass of phosphoric acid that can be produced by the reaction of 1 ton of phosphate rock, Ca(PO4)2, and sulfuric acid.
January 2, 2011

Chemistry
Determine the mass of phosphoric acid that can be produced by the reaction of 1 ton of phosphate rock, Ca(PO4)2, and sulfuric acid.
January 2, 2011

11th grade
d sensitive to variations in any currency
December 21, 2010

math
16g of mix for each litre of water so how many grams in 100ml
December 13, 2010

10th grade
A volume is measured experimentally as 4.5 mL. What is the percent error, given that the correct value is 4.17 mL? answer units in %
December 11, 2010

5th grade math
No, divide 24 by 3/4. remember you need to multiply by the opposite of the fraction so it is 24 times 4 and dived by 3 :) answer:32
December 8, 2010

Precalculus
2sin^2x+3cosx=3 find all solutions in the interval [0,2pi]
December 8, 2010

Precalculus
2sin^2x+3cosx=3
December 8, 2010

science
To know what kind of disease/health condition that you may be at risk of.
December 8, 2010

9th grade
at 20 degrees celsius, how much sodium chloride could be dissolved in 2 L of water?
December 7, 2010

Physics
if a 120-g mass is placed at the 25-cm mark and a 25-g mass at the 10-cm mark, where should a 500-g mass be placed to balance the system?
December 7, 2010

Math
The shorter leg of a right triangle is 14 feet shorter than the longer leg. The hypotenuse is 26 feet. How long is each leg?
December 4, 2010

sociology
It's funny... they're still using this question even now. I have sociology right now and this was our week 7 assignment. Good to know things haven't changed, huh?
December 3, 2010

math
what set of 7 numbers have the following landmarks'''' mode 21 median 24 maximum 35 range 20
December 1, 2010

Finance
John has a chocie to make between two investment opportunities. investment 1, would bear a interest of 12.5% over a period of 5 years but is taxable. investment 2 would bear an interest of 8% over the same period but is tax exempt. If john 's taxable rate is 12% which ...
December 1, 2010

physics
Review Conceptual Example 2 in preparation for this problem. In Figure 5.4, an object, after being released from its circular path, travels the distance OA in the same time it would have moved from O to P on the circle. The speed of the object on and off the circle remains ...
November 29, 2010

physics
I think that power is actually equal to the change in voltage multiplied by the current, not just the voltage itself. Or at least that is what my formula sheet says. Good luck! I'm working on the same question
November 23, 2010

Math
If Betsy leaves Town A traveling due east for 6 miles to Town B, then turns due north and travels 9 miles to Town C, how far will her trip home be to Town A as she travels directly southwest?
November 20, 2010

Math
If Betsy leaves Town A traveling due east for 6 miles to Town B, then turns due north and travels 9 miles to Town C, how far will her trip home be to Town A as she travels directly southwest?
November 20, 2010

physics
its not right. i checked
November 20, 2010

physics
A rocket of mass 4.50 105 kg is in flight. its thrust is directed at an angle of 64.0° above the horizontal and has a magnitude of 7.50 106 N. Find the magnitude and direction of the rockets acceleration. Give the direction as an angle above the horizonal.
November 20, 2010

physics
A 1000 kilogram car traveling at 25 mph hits a 60 kg person. How much force is exerted on the person?
November 17, 2010

math
47.6
November 17, 2010

physics
A 1000 kilogram car traveling at 25 mph hits a 60 kg person. How much force is exerted on the person?
November 17, 2010

Math
Name 3 different ways in which these numbers can be classified. 11 4.5 50 8 16 3/5 100 20 9 8.6 14 1/2
November 16, 2010

math
Name some different ways in which these numbers can be classified. 11,4.5,50,8,16,3/5,100,20,9,8.6,141/2
November 16, 2010

Physics & Calc
Derive the stationary target equations: v1 = [(m1-m2)/(m1+m2)]v1 v2 = [(2m1)/(m1 + m2)] v1
November 11, 2010

physics
A woman stands on a scale in a moving elevator. Her mass is 71.0 kg, and the combined mass of the elevator and scale is an additional 815 kg. Starting from rest, the elevator accelerates upward. During the acceleration, the hoisting cable applies a force of 9440 N. What does ...
November 10, 2010

physics
The weight of an object is the same on two different planets. The mass of planet A is only fifteen percent that of planet B. Find rA/rB, which is the ratio of the radii of the planets.
November 7, 2010

physics
A rock of mass 48 kg accidentally breaks loose from the edge of a cliff and falls straight down. The magnitude of the air resistance that opposes its downward motion is 275 N. What is the magnitude of the acceleration of the rock?
November 7, 2010

Physics
Water is moving with a speed of 5.0 m/s through a pipe with a cross-sectional area of 4.2 cm2. The water gradually descends 8.2 m as the pipe increases to 9.0 cm2. (a) What is the speed at the lower level? (b) If the pressure at the upper level is 1.8 × 105 Pa, what is ...
November 7, 2010

physics please help
I used the same equation as you did for average force, but when I divided change in momentum by time of impact I got 444. averageforce=changemomentum/timeimpact =(1.80)/(4.05*10^3) = 444.4
November 5, 2010

Math
If n ÷ d gives a display of 16.8, does d\n? Why
November 4, 2010

Physics - Standing Waves
a) It's a straight line because it is a function os the form y=mx+b b) The slope of the line if m=0.5 c) The intercept of ln v is -0.5ln(LMD) and the intercept of the ln T axis is 0.5 ln (LMD)
November 4, 2010

chemistry
What is the molarity of NaOCL in a solution of bleach if 10.00mL requires 22.35mL of 0.0291 M Na2S2O4 to reach the endpoint.
November 3, 2010

p``
At a time when mining asteroids has become feasible, astronauts have connected a line between their 3640 kg space tug and a 6500 kg asteroid. Using their ship's engine, they pull on the asteroid with a force of 490 N. Initially the tug and the asteroid are at rest, 500 m ...
November 1, 2010

Physics
An office window has dimensions 3.6 m by 2.5 m. As a result of the passage of a storm, the outside air pressure drops to 0.925 atm, but inside the pressure is held at 1.0 atm. What net force pushes out on the window?
November 1, 2010

5th grade math
3x=x with x= the quantity the brother has
November 1, 2010

Physics
Apply T=T and use uk an us but u must have uk biger than the force
November 1, 2010

Chemistry
How fast must a 144 g baseball travel in order to have a de Broglie wavelength that is equal to that of an x-ray photon with = 100. pm?
November 1, 2010

Chemistry
Calculate the energy difference (E) for the transition from n = 1 to n = 6 energy levels of hydrogen per 1 mol of H atoms. (Report your answer to at least 3 significant figures.)
November 1, 2010

chemistry
Suppose the ΔGof, ΔHof, and ΔSo are available and valid at 298 K. Which equation(s) could be used to calculate the change in Gibbs Energy if all product and reactant concentrations (pressures) are 1 M (1 atm) and the temperature is 298 K? Choose all that apply...
October 27, 2010

chemistry
how quickly must a 54.7 g tennis ball travel i order to have a de Broglie wavelength that is equal to a photon of green light?
October 24, 2010

English
Is this a simile or a metaphor The rain felt like small kisses on Rosemary's face,
October 21, 2010

Chemistry
When 32.0 mL of 0.560 M H2SO4 is added to 32.0 mL of 1.12 M KOH in a coffee-cup calorimeter at 23.50°C, the temperature rises to 30.17°C. Calculate H of this reaction per mole of H2SO4 and KOH reacted. (Assume that the total volume is the sum of the individual volumes ...
October 20, 2010

Chemistry
A 30.5 g sample of an alloy at 93.7°C is placed into 50.1 g water at 23.4°C in an insulated coffee cup. The heat capacity of the coffee cup (without the water) is 9.2 J/K. If the final temperature of the system is 31.1°C, what is the specific heat capacity of the ...
October 20, 2010

physics
The only force acting on a 3.0 kg body as it moves along the positive x axis has an x component Fx = -9x N, where x is in meters. The velocity of the body at x = 2.3 m is 9.7 m/s. (a) What is the velocity of the body at x = 4.4 m? (b) At what positive value of x will the body ...
October 18, 2010

Chemistry
A 26.5 g sample of ethylene glycol, a car radiator coolant, loses 675 J of heat. What was the initial temperature of ethylene glycol if the final temperature is 32.5°C (c of ethylene glycol = 2.42 J/gK)? Please help me, I don't even know where to begin!!
October 18, 2010

Chemistry
What is the enthalpy change when 17.0 g of water is cooled from 36.0°C to 6.40°C?
October 18, 2010

Chemistry
3 M HCl solution was used to generate CO2 from the CaCO3 . What will be the effect on the value reported for the molar volume of CO2 if 6 M HCl was used instead (too high, too low, no difference)? Explain.
October 16, 2010

physics
Two cars, A and B, are traveling in the same direction, although car A is 174 m behind car B. The speed of A is 25.6 m/s, and the speed of B is 18.6 m/s. How much time does it take for A to catch B?
October 16, 2010

Chemistry
A mixture of gases collected over water at 14C has a total pressure of 1.198 atm and occupies 72 mL. How many grams of water escaped into the vapor phase?
October 15, 2010

Spanish-SraJMcGin-please check
Posted by Megan on Wednesday, October 13, 2010 at 5:08pm. I just reposted this from the earlier post- I have two questions about translation. If asked this question, how do I answer it. Cual es tu numero de telefono? I know it is asking my phone number which is 447-7161 but I ...
October 13, 2010

Spanish-SraJMcGin-Please check
Hola, I know about the accent marks-I use spanish typeit and do my work in there when I have to type it-sorry about not doing it here One question, I can only use the words my teacher taught so far in Spanish and I didn't learn ir a nadar for the second one. Can I just put...
October 13, 2010

Spanish
No numero de telfono-doesn't that say no number of telephone is .... instead of my phone number is .... For what I like to do on Sat. can I say El sabado me gusta....
October 13, 2010

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