Friday
July 25, 2014

Posts by emily


Total # Posts: 2,298

math
how many combinations can you get with 18 flavors of ice cream and 70 toppings?

math
find two point the perpendicular bisector of line AB. verify your results by showing each point is equidistant from A and B. A(3,0) B (1,4)

Johnson
How do I record this transaction? Sold inventory on account for $500, cost of merchandise sold was $300. (Record the sale first and then the cost.)

Biology
In a lab experiment, we experimented with 1% glucose solution and Sorenson's solution to determine pH levels and whatnot; the other part of the lab was to determine which one, if either, was a buffering solution. According to the notes my instructor gave us, a buffers are ...

Physics
A ball on the end of a string is whirled around in a horizontal circle of radius 0.486 m. The plane of the circle is 1.83 m above the ground. The string breaks and the ball lands 2.39 m away from the point on the ground directly beneath the ball’s location when the string...

Chem
How can the concept of specific heat capacity of water be used to explain the heating and cooling patterns if the oceans and the climate on the planet?? Can someone please explain this to me it would really help a lot.

Hiastory HURRY!!!!!!!!!!!!!!!!!!!!!!!
The answer is A

Hiastory HURRY!!!!!!!!!!!!!!!!!!!!!!!
The answer is A

College Finite
Assume that you have a total of 9 people on the committee: 2 black males, 1 black female, 1 white male, and 5 white females. Party rules require that at least one black and at least one female hold one of the three offices. In how many ways can the officers be chosen while sti...

College Finite
108 is not correct. Thanks for trying tho Reiny!

College Finite
A student wants to buy 3 CDs, but assume that there are 3 CDs featuring the piano, 5 CDs featuring the trumpet, and 3 CDs featuring the saxophone. In how many ways can the selection be made if CD's featuring at least 2 different instruments are selected?

chem
what is the change in enthalpy for CH4(g) + 2O2(g)----->CO2(g)+2H20(I) CH4: -74.86 CO2: -393.5 H2O: -285.5 I got triangle H: 890KJ/Mol is that correct?

math- plz hlp
Thx u very much!

math- plz hlp
The denominator of a fraction is greater than its numerator by 9. If 7 is subtracted from both its numerator and denominator, the new fraction equals 2/3. What is the original fraction?

Economics
B.

English
In the following sentence is there a direct object or a predicate adjective? Sometimes I feel nervous before a game.

fractions greater than one.
write the mixed number as an improper fraction

Physics
A satellite moves in a circular orbit around the Earth at a speed of 5.4 km/s. Determine the satellite’s altitude above the surface of the Earth. Assume the Earth is a homogeneous sphere of radius 6370 km and mass 5.98 × 10 24 kg. The value of the universal gravitat...

physics
An athlete whirls a 6.6 kg hammer tied to the end of a 1.2 m chain in a horizontal circle. The hammer moves at the rate of 0.432 rev/s. What is the centripetal acceleration of the hammer? Assume his arm length is included in the length given for the chain. Answer in units of m...

Physics
According to the Guinness Book of World Records (1990 edition, p. 169), the highest rotary speed ever attained was 2010 m/s (4500 mph). The rotating rod was 15 cm (5.9 in) long. Assume the speed quoted is that of the end of the rod. What is the centripetal acceleration of the ...

physics
A 1.62 kg mass attached to a light string rotates on a horizontal, frictionless table. The radius of the circle is 0.986 m, and the string can support a mass of 32.5 kg before breaking. The acceleration of gravity is 9.8 m/s 2 . What maximum speed can the mass have before the ...

7th grade Social Studies Ms. Sue please!
1. organize information. 2. enough detail. 3. Earth's tilt and orbit 4. new landforms. 5. latitude. 6. polar. 7. birth rates and death rates. 8. They cannot find work. 9. subsistence farming. 10. city-state. 11. 1. organize information. 2. enough detail. 3. Earth's til...

Chemistry 1
We are working on molarity of a solution in my class, and I am a little stumped on how to set the problems up. Here is one question from my homework. How many grams of NaCl are needed to make 575mL of 1.5 M NaCl solution? Thank you in advance :)

Physics
We went over this in my physics class yesturday, and I understand most of the concepts of this section of the book, but the examples we were given confuse me. I can find no connection between the numbers of tangential speed and RPM. :(

geometry
Create a word problem about a real life situation involving perimeter and area of a composite shape. I don't know any real life situations involving perimeter and area of a composite shape. Need Help. Please Help.

Physics
A police car is at rest beside a road, looking for speeders. A car passes going at a constant speed of 30.0 m/s. The police car starts up 4 seconds later and accelerates at 2 m/s sq. until it reaches a speed of 40m. If the police car maintains this speed until it catches up wi...

Social Studies
natural resources Yankee Zimbabwe I'm studying geography

physics
One strategy in a snowball fight is to throw a snowball at a high angle over level ground. While your opponent is watching this first snowball, you throw a second snowball at a low angle and time it to arrive at the same time as the first. Assume both snowbal...

Physics
A football is thrown toward a receiver with an initial speed of 17.5 m/s at an angle of 35.2◦ above the horizontal. At that instant, the receiver is 16.7 m from the quarterback. The acceleration of gravity is 9.81 m/s^2 With what constant speed should the receiver run to...

physics
A particle travels horizontally between two parallel walls separated by 18.4 m. It moves toward the opposing wall at a constant rate of 9.4 m/s. Also, it has an acceleration in the direction parallel to the walls of 5.8 m/s^2 What will be its speed when it hits the opposing wa...

trigonometry
4.if cotθ = -√15/7 , use the fundamental identities to find cosθ > 0 9.A projectile is fired with an initial velocity of 88 ft/sec at an angle of 35° to the horizontal. Neglecting air resistance, what is the time of impact? (Round to the nearest ...

math
thank you! we just learned decimals to fractions and vice versa today so I thank you for your help and now I can solve the remainder of the problem myself. thank you!

math
what is 1 3/4 as decimal

Chemistry
Hi, i'm really desperate! could anyone please help me with this question, I'm stumped. 'A buffer is prepared by mixing a 100.omL of a 0.100 M NH3 solution with a 0.200M solution of NH4CL solution and making the total volume up to 1.000L of water. What is the volume...

English
Thanks. Danita is saving her old watch for when the new one stops. Dependent clause when the new one stops Modifies saving Adverb

English
Dependent clause after he reviewed the chapter Adverb it modifies when it was easier?

English
I promise I have! It is just not making any sense to me!

English
In the sentence the homework was easier for Tyrone after he received the chapter. Is the dependent clause was easier for Tyrone? Is that a noun since it is a predicate noun?

math
I'm not sure what the answer is, but I think I might know how you will be able to figure it out. Take the $.01 Mary got the first week and double it to get what she got the second week ($.02). Then multiply the $.02 by 2 to get what she got the third week ($.04) Progress- ...

English
You might combine bits of information, that you have so far with the context. Dependent Claus that you have so far. Adjective that describes information?

English
Thanks. How about this one. For example, since amorphous ends in ous, it is probably an adjective. Dependent Claus since amorphous ends in ous, Adverb?

English
In these two I am torn between adverb and noun. If all else fails, go to the dictionary. If you are familiar with the word metamorphosis, you might figure out the meaning of morph from that word. The top one noun? The bottom one adverb?

English
The subject of the word gives is the dependent Claus?

English
I am really not understanding this at all. How a word begins and ends often gives clues to its meaning. Dependent Claus how a word begins and ends. Adverb modifying what it gives?

English
In the sentence still what morph means remains the critical question. Is the dependent clause still what morph means? Is it an adverb describing the clause remains?

English
I have to underline the dependent clause and tell whether it is an adjective, adverb, or noun. Can you help me with the following. If you sit down with a novel and a dictionary, you can refer to the dictionary often. Still what morph means remains the critical question.

Physics
A plane is flying horizontally with speed 152 m/s at a height 2110 m above the ground, when a package is dropped from the plane. The acceleration of gravity is 9.8 m/s 2 . Neglecting air resistance,A second package is thrown downward from the plane with a vertical speed ...

physics
A truck travels up a hill with a 10 ◦ incline. The truck has a constant speed of 21 m/s. What is the horizontal component of the truck’s velocity? Answer in units of m/s What is the vertical component of the truck’s velocity? Answer in units of m/s

Physics
A person standing close to a railroad crossing hears the whistle of an approaching train. He notes that the pitch of the whistle drops as the train passes by and moves away from the crossing. The frequency of the distant approaching whistle is 540 Hz; it drops to 470 Hz after ...

physics
Two pipes, equal in length, are each open at one end. Each has a fundamental frequency of 475 Hz at 297 K. In one pipe the air temperature is increased to 304 K. If the two pipes are sounded together, what beat frequency results?

8th grade math
1/3 for Seth. The ratio is 3:2:1

spanish
Can someone please proof-read what I have so far on my Spanish essay for finals? Here it is so far: Antes de ver al aeropuerto, es importante confirmer el vuelo. Haces la maleta con ropa para tus vacacion. Cuando llegas el areopuerto, recibes la tareta de embarque y ver a segu...

Economics
The answer is D. It revolves around the family unit.

General Chemistry I
Never mind, I just found my error; I incorrectly converted between Torr and atm, I should've gotten 1.05 atm instead.

General Chemistry I
And according to this solution I have here the correct answer is b. 1,250 mL~

General Chemistry I
A sample of gas occupies a volume of 59.9 mL. As it expands, it does 126.2 J of work on its surroundings at a constant pressure of 798 torr. What is the final volume of the gas? a. 61.1 mL b. 1,250 mL c. 218 mL d. 1,490 mL e. None of the above I used the work function w = -P&#...

General Chemistry I
Thank you so much, this makes much more sense than what I was doing; I was dividing each amount by the number of moles of O, not Br, which explains why I was getting crazy numbers.

General Chemistry I
A sample of a compound containing only Br and O reacts with an excess of H2 to give 6.601 g of HBr and 3.919 g of H2O. What is the empirical formula of this compound? a. BrO b. BrO2 c. Br2O d. BrO3 e. None of the above I already know the answer is (e), but I am not entirely su...

ap chemistry
A calorimeter contains 20.0 of water at 12.5 . When 2.20 of (a substance with a molar mass of 59.0 ) is added, it dissolves via the reaction and the temperature of the solution increases to 27.5 . Calculate the enthalpy change, , for this reaction per mole of . Assume that the...

Physics
Use 5.98 × 10 24 kg as the mass of the Earth. A 2350 kg meteorite has a speed of 143 m/s just before colliding head-on with the Earth. Determine the recoil speed of the Earth. Answer in units of m/s

Physics
Note: Take East as the positive direction. A(n) 86 kg fisherman jumps from a dock into a 131 kg rowboat at rest on the West side of the dock. If the velocity of the fisherman is 5.2 m/s to the West as he leaves the dock, what is the final velocity of the @...

physics
A 67.3 kg ice skater moving to the right with a velocity of 2.52 m/s throws a 0.151 kg snowball to the right with a velocity of 33.7 m/s relative to the ground. What is the velocity of the ice skater after throwing the snowball? Disregard the friction between the skates and th...

physics
A 2.24 kg mass on a frictionless horizontal track is attached to the end of a horizontal spring whose force constant is 4.45 N/m. The mass is displaced 3.06 m to the right from its equilibrium position and then released, which initiates simple harmonic motion. How many times d...

Physics
A 83.5 kg astronaut is working on the engines of a spaceship that is drifting through space with a constant velocity. The astronaut turns away to look at Earth and several seconds later is 35.5 m behind the ship, at rest relative to the spaceship. The only way to return to the...

Physics
A baseball player uses a pitching machine to help him improve his batting average. He places the 43.4 kg machine on a frozen pond. The machine fires a 0.0546 kg baseball horizontally at a speed of 44.8 m/s. What is the magnitude of the recoil velocity of the machine? Ans...

Physics
A solid metal ball and a hollow plastic ball of the same external radius are released from rest in a large vacuum chamber. When each has fallen 1 m, they both have the same 1. momentum. 2. inertia. 3. speed. 4. change in potential energy. 5. kinetic energy.

Chemistry
thanks!

Chemistry
Calculate delta H for this reaction: N2 + 3H2 --> 2NH3 I am given the bond dissociation energy for N-N (163 kJ/mol), H-H (436 kJ/mol), and N-H (391 kJ/mol) I can't seem to find a similar problem anywhere, they are all given 2 or 3 similar equations.

physics HELP!
The observed wave speed is 20.3 m/s when the suspended mass is m = 3.07 kg. What is the mass per unit length of the string? I keep calculating this out to be .5199 kg/m which i know is wrong! HELP!

Into. Chemistry
I'm trying to do this precipitation reaction problem, but I don't understand part of it. The question is: Does a precipitate form when aq. soultions of potassium nitrate (KNO3) and sodium iodide (NaI) are mixed? Then it lists the solutions for the two: KNO3(aq) --> ...

Chemistry
If saturated solution of barium chloride at 30 degree Celsius contains 150g water how much additional barium chloride can be dissolved by heating it to 60 degree Celsius? 30 degrees Celsius = 38.2 60 degrees Celsius = 46.6

English
In Romeo and Juliet, what is ironic about Lord Capulet's praise of Friar Lawrence in Act 4 Scene 2?

us history
Compara and contrast your modern immigrant to historical immigrants. Atleast 10 bullets on each section. (Historical Immigration, both, and Modern immigration)

Physics
Two different simple harmonic oscillators have the same natural frequency (f=5.60 Hz) when they are on the surface of the Earth. The first oscillator is a pendulum, the second is a vertical spring and mass. If both systems are moved to the surface of the moon (g=1.67 m/s2), wh...

Physics
A 2.24 kg mass on a frictionless horizontal track is attached to the end of a horizontal spring whose force constant is 4.45 N/m. The mass is displaced 3.06 m to the right from its equilibrium position and then released, which initiates simple harmonic motion. What is the forc...

science
A 2.24 kg mass on a frictionless horizontal track is attached to the end of a horizontal spring whose force constant is 4.45 N/m. The mass is displaced 3.06 m to the right from its equilibrium position and then released, which initiates simple harmonic motion. What is the forc...

physics
A 53.6 kg circus performer bobs up and down at the end of a long elastic rope at a rate of once every 2.80 s. The elastic rope obeys Hooke's law. Find how much the rope is extended beyond its unloaded length when the performer hangs at rest. ** I think Im missing a step wh...

physics
An archer pulls her bow string back 0.370 m by exerting a force that increases uniformly from zero to 225 N. What is the equivalent spring constant of the bow?

English
What about this one. Seeing the old slides remind reminded me of the good times we had. The verbal is seeing and it is a gerund?

English
In the first sentence I think it is a noun but in the second sentence I think it is an adjective? Is that correct?

English
Baking is a major project for the holidays. Is the verbal baking? Is this a gerund or a participle and why? Baking in the oven, the bread smelled delicious. Is the verbal baking in the oven? Is this a gerund or a participle and why?

Statistics
All else equal will the confidence intervals for samples of size 80 be longer or shorter than those for sample of size 40?

Math
decide on a topic which is adding drinks to each purchase from the lunch for which they would like to collect data and design a survey for school which could really be used to convince the principal to do. Create 7 questions for the survey. My questions so far are: Would you l...

Science
Sorry the subject is science

niches
can animals be consumers and decomposers? or are they only separated?

Spanish
Is this wrong? Tienen que hacen las maletas. Salen para Monterrey mañana.

math
decide on a topic which is adding more clubs for which they would like to collect data and design a survey for school which could really be used to convince the principal to do. Create 5-7 questions for the survey. Some of my questions for the survey are: Do you want to add mo...

Math
How long it will take for an investment of 2000 dollars to double in value if the interest rate is 9.5 percent per year, compounded continuously?

Math
decide on a topic which is adding more clubs for which they would like to collect data and design a survey for school which could really be used to convince the principal to do. Create 5-7 questions for the survey.

Physical Chemistry
"Liquids A and B, which have identical molar volumes, are mixed together in equal volumes to form a 75 mL mixture. The liquids are partially miscible and the mixture phase separates into an upper phase with a composition xA=0.45 and a lower phase with a composition xA=0.8...

Math
Will someone please assist me?

physics help!
When a gas follows path 123 on the PV diagram in a rectangle shape labeled 1234 cycle, 449 J of heat flows into the system and 179 J of work is done. What is the change in the internal energy of the system? * I keep coming up with 270 but this is incorrect. PLEASE HELP :)

Chemistry
Ag(NO3)+ CaClYields to AgCl + (NO3)Ca KI + Pb(NO3) yields to K(NO3)+ IPb What is the precipitate in both??

math((PLEASE HELP!))
5-3r=-37 r= ? x/8+10=13 x= ?

7th grade math Ms. Sue please check
#8 is 25%

math((PLEASE HELP!))
5-3r=-37 r= ? x/8+10=13 x= ?

Math
Is a bar graph better than a pictograph to display data? Explain.

Physics
A golf club strikes a 0.061-kg golf ball in order to launch it from the tee. For simplicity, assume that the average net force applied to the ball acts parallel to the ball’s motion, has a magnitude of 7760 N, and is in contact with the ball for a distance of 0.014 m. Wit...

Physics
The brakes of a truck cause it to slow down by applying a retarding force of 8740 N to the truck over a distance of 1130 m. What is the work done by this force on the truck?

Algebra
It says this site is homework help, why don't you evaluate it for her? She needs help!

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