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August 22, 2014

Posts by anon


Total # Posts: 1,336

physics
can u show me the steps to the problem. thanks
September 26, 2011

physics
A car travels along a straight stretch of road. It proceeds for 14 mi at 50 mi/h, then 28.3 mi at 48 mi/h, and finally 37.4 mi at 38.3 mi/h. What is the car’s average velocity during the entire trip? Answer in units of mi/h
September 26, 2011

Physics
A baseball pitcher can throw a baseball at a velocity of 44.5 m/s. If the mass of the ball is 0.12 kg and the pitcher has it in his hand over a distance of 1.79 m, what is the average force exerted by the pitcher on the ball?
September 26, 2011

physics
A car travels in a straight line for 4.9 h at a constant speed of 73 km/h . What is its acceleration? Answer in units of m/s2
September 25, 2011

physics
A car travels along a straight stretch of road. It proceeds for 15 mi at 51 mi/h, then 28.2 mi at 44 mi/h, and finally 36.4 mi at 39.3 mi/h. What is the car’s average velocity during the entire trip? Answer in units of mi/h
September 25, 2011

physics
If a race car completes a 3 mi oval track in 50 s, what is its average speed? Did the car accelerate? 1. Yes, the speed changed. 2. No, the speed didn’t change. 3. Yes, the direction of the motion changed.
September 25, 2011

physics
A jet travels at 433 m/s. How long does it take to travel 210 m? Answer in units of s How long to travel 12.4 km? Answer in units of s How long to travel 11 in? Answer in units of s thank you
September 25, 2011

SAT algebra
yeah, don't pay attention to original answerer... they are totally wrong. i'm looking for help too :|
September 24, 2011

Physics
In recent years a number of nearby stars have been found to possess planets. Suppose the orbital radius of such a planet is found to be 5.5 x1011 m, with a period of 1210 days. Find the mass of the star.
September 20, 2011

Physics
A stone of mass 3.2 kg is tied to a string of length 0.9 m, and is swung in a horizontal circle with speed v. The string has a breaking point force of 10.1 N. What is the largest value that v can have without breaking the string?
September 20, 2011

Physics
In the game of baseball, a pitcher throws a curve ball with as much spin as possible. This spin makes the ball “curve” on its way to the batter. In a typical case, the ball spins at about 20.5 revolutions per minute. What is the maximum centripetal acceleration of a ...
September 19, 2011

calculus
So, the question is stating that the time period you are looking for is when the ball is thrown at 1 second and goes to .1 second. So, you want the velocity of the ball at the interval [1,1.1]. Velocity is the change in distance/ change in time. What is the change of the ...
September 14, 2011

AP Chemistry
What is the weight of 6.3 × 10 21 atoms of phosphorus? Answer in units of g
September 13, 2011

College Physics
A person riding a bicycle on level ground at a speed of 10.6 m/s throws a baseball forward at a speed of 19.1 m/s relative to the bicycle at an angle of 41° relative to the horizontal (x) direction. (a) If the ball is released from a height of 1.3 m, how far does the ball ...
September 12, 2011

College Physics
A cable attached to a block of mass 16.35 kg pulls the block along a horizontal floor at a constant velocity. If the tension in the cable is 9.36 N, what is the coefficient of kinetic friction between the block and the floor? not sure how to do this one ... I am thinking I use...
September 12, 2011

College Physics
A hockey puck slides with an initial speed of 43.2 m/s on a large frozen lake. If the coefficient of kinetic friction between the puck and the ice is 0.036, what is the speed of the puck after 10.4 s?
September 11, 2011

College Physics
A constant force of 2854 N acts on a spacecraft of mass 6100 kg that has an initial velocity of 32 m/s. How far has the spacecraft traveled when it reaches a velocity of 1170 m/s? I used: Vo=32 m/s, Vf=1170 m/s, F= 2854 N, and mass= 6100 kg I then solved for a by taking N/kg...
September 11, 2011

Physics
A hockey puck slides with an initial speed of 43.2 m/s on a large frozen lake. If the coefficient of kinetic friction between the puck and the ice is 0.036, what is the speed of the puck after 10.4 s?
September 11, 2011

science
I need a hypothesis that I did not use already to determine which bees will fly further-the older ones or the younger ones.any ideas?
September 3, 2011

math solution
not sure but you can try multiplying all the numbers
September 3, 2011

Atomic Number Chem
The atomic number of fluorine is 9. What is the mass number of a fluorine atom with 8 neutrons?
August 29, 2011

physics
so what is the answer
August 21, 2011

Physics/Algebra
Oh, yes. I am sorry. I am attempting to calculate the height of the fountain. It does indeed seem rather high. But the numbers for my assignment are randomly generated. So that may explain this phenomenon. Thank you for your help.
August 14, 2011

Physics/Algebra
A student walks around a pool and estimates the pool has a circumference of 240 m. Using a protractor the students gages the angle of elevation to the top of the fountain, in the center of the pool, to be 74 degrees.
August 14, 2011

Algebra
Thank you. :D
August 14, 2011

Algebra
Consider the system: 9x-6y=78 -4y-14x=-68 Find X I have attempted to work through the problem three times, and am having difficulty knowing exactly what to do. Thank you for your help. c:
August 14, 2011

PHYSICS
k=2.6*9.8/.05 N/m Make sure you take the difference of the stretched string versus the one without any weight. How long should be x = 4*9.8/k
June 30, 2011

chemistry
HAHAHAHAHAHAHAHA!!!!!!11!1!!one1! thats hilarious... but the answer is -3.2*10^3
June 14, 2011

Physics
A 17 g rifle bullet traveling 220 m/s buries itself in a 3.9 kg pendulum hanging on a 3.0 m long string, which makes the pendulum swing upward in an arc. Determine the vertical and horizontal components of the pendulum's displacement. Horizantal ____ J Vertical _____ J
June 6, 2011

com 155
11. rainforest is one word
May 24, 2011

apchem
can someone explain the synthesis reaction from ethane to acetylene?
May 22, 2011

precalc
find the domain and range of the following as an inequality and interval notation. y=sqrtx-3 2: y=3x+5 3: y= 2/x-7 4; y=2+sqrt x
May 4, 2011

calc
x^2=10-4x
May 4, 2011

modeling and equation solving
using a formla to relate variable quantities associated with the phenomena. a pizza place sells rectangular 18" by 24" pizza for the same price as its large round 24" diameter. if both are the same thickness which option gives you the most pizza for the money.
May 4, 2011

ENGLISH
1 is A 2 is D 3 I don't know 4 is D 5 is A 6 is D 7 I don't know 8 I don't know I think D 9 is C Hope this helps and next time just ask your teacher she is there to help
April 28, 2011

Physical Science
The soup in a bowl is too hot to eat. Although there are no ice cubes in the freezer, there are several stainless steel spoons that have been stored in the freezer for several hours. By placing the cold spoons in the hot soup, the soup's temperature is lowered from a ...
April 28, 2011

OChem
Why would diethylammonium chloride insoluble in ether? Is the only reason why the salt is insoluble because of polarity, or are there other reasons why? Please explain.
April 27, 2011

Ochem
Diethyl ether is used as a solvent for the reaction of diethylamine with m-toluoyl chloride. Why is a solvent necessary for this reaction?
April 26, 2011

History
What is the point of this site*
April 20, 2011

History
what is the point of this class if nobody answers questions but instead says "...no one here will do your homework for you". Study guides and answers do not mean the person will plagiarize your answer. Thanks for the help anyways..
April 20, 2011

Organic Chemistry
thank you very much for the help.
April 19, 2011

Organic Chemistry
What advantages does H NMR have over melting point in the determination of purity?
April 19, 2011

Chemistry
How??
April 15, 2011

chemistry
P1V1= P2V2 Let P1= P1 (550mL)(P1)= (V2)(22P1) P1 Cancels Out. V2 = 550/22 mL
April 11, 2011

algebra
Create an equation of a nonlinear function and provide two inputs
April 5, 2011

algebra
i do not understand how to solve for x and y can someone please explain it to me. an example of the problem i am workin on is 6x-4y=72
April 3, 2011

Spanish
descansas tocamos practico estudias monto estudio
March 30, 2011

Spanish
can you check the accent marks. First poem No sé qué te diera, por una mirada… un mundo, por una sonrisa… el cielo, por un beso… ay no sé que te diera por un beso second poem Veo la luna y la luna ve a mí Que Dios bendiga la luna, y ...
March 30, 2011

Spanish
1.Choose the correct past participle for the Spanish verb cantar. A. canté B. cantaba C. cantado D. canto C is my answer. 2. Choose the correct past participle for the Spanish verb salir. A. salía B. salió C. salido D. sale C is also my answer. Choose the ...
March 29, 2011

Spanish
The peoms are written that way I'm just not sure of the accent marks of some words. If you can help me,that would be great and also explain the accent marks more. that would help me in future. Thanks! First poem No sé qué te diera, por una mirada… un ...
March 29, 2011

Spanish
The peoms are written that way I'm just not sure of the accent marks of some words. If you can help me,that would be great and also explain the accent marks more. that would help me in future. Thanks! First poem No sé qué te diera, por una mirada… un ...
March 28, 2011

Physics
What does the symbols u and u' stand for?
March 28, 2011

Spanish
i had to listen to an audio of these two poems and type them down. I did that part but I'm not sure of the accent marks of some words. If you can help me that would be great and also explain them to me more like do the meanings differ in the following poems ?? that would ...
March 28, 2011

Spanish
Can you please help me with this question. 1.Select the correct form for the verb escribir: He doubted the prince wrote stories for children. Dudaba que el principe __ cuentos para ninos A.escribe B.escribia C.escribiera D.escribio
March 26, 2011

Spanish
Can you double check if I followed the directions correctly this time too and the answers were correct. Give the correct form of the appropriate verb, saber or conocer, which would be used in writing the following sentences in Spanish.Be sure the verb is written in the correct...
March 25, 2011

Spanish
once x cien = mil cien once x cien = Mil ciento which on is right??
March 25, 2011

Spanish
1. Choose the correct Spanish translation for: “Vincent introduced himself to Rose.” A. Vicente me presentó con Rosa. B. Vicente presentó Rosa él. C. Vicente se presentó con Rosa. D. Vicente me presentó Rosa. 2. Choose the correct ...
March 25, 2011

Spanish( corrected the questions answer.)
Porque él ya había visto la película, él sabia lo que pasó
March 24, 2011

Spanish
Give the correct form of the appropriate verb, saber or conocer, which would be used in writing the following sentence in Spanish. 2. Because he had already seen the movie, he knew what happened? El ya sabía lo que pasaba porque ya vio la película. would the ...
March 24, 2011

Physics
A skier (m=61.0 kg) starts sliding down from the top of a ski jump with negligible friction and takes off horizontally. If h = 7.70 m and D = 11.4 m, find H. Find her total kinetic energy as she reaches the ground.
March 24, 2011

Spanish
Una noche, cuando yo era chica, miré por la cerradura de una puerta y esto es lo que ví: ví una mesa, ví una silla, ví un cojín, y ví una vela. La mesa estaba sobre el piso, la silla estaba sobre la mesa, el cojín estaba ...
March 24, 2011

Spanish (please correct me if I'm still wrong)
Give the correct form of the appropriate verb, saber or conocer, which would be used in writing the following sentences in Spanish. 12. Maria knew everyone. 13. Because he had already seen the movie, he knew what happened? 14. The student knows the answer. 15. He knows Bach&#...
March 24, 2011

Spanish
would 3 be like this Lo estudiantes saben la respuesta. and are the rest correct?
March 23, 2011

Spanish
is this right?? 1- Conocía-- (María conocía a todos) 2- Sabía-- (El ya sabía que pasaba porque ya vio la película) 3-Saben-- (Los estudiantes saben la respuesta) 4-Conoce-- (Él conoce la música de Bach) 5-Sabes-- (¿...
March 23, 2011

Spanish
Give the correct form of the appropriate verb, saber or conocer, which would be used in writing the following sentences in Spanish. 12. C Maria knew everyone. 13. S Because he had already seen the movie, he knew what happened? 14. S The student knows the answer. 15. C He knows...
March 23, 2011

Spanish
Conjugate the following irregular verbs in the simple present tense (Indicative).? >> are my answers correct. tener (to have) yo >> tengo tener (to have) nosotros >> tenemos venir (to come) tu >> vienes venir (to come) nosotros >> venimos salir (...
March 22, 2011

Spanish
Which is the correct substitute for the underlined words? Hablamos de los príncipes.( los príncipes is underlined). A)éstas B)éstos C)están D)éstan El duque ama a la duquesa. ( la duquesa is underlined) A)esta B)estás C)é...
March 22, 2011

Spanish
It's not url it's a pharagraph. I think it's because I copy pasted it ?
March 19, 2011

(ignore) I cant post because of url dont know why?
Spanish
March 19, 2011

Spanish
The following paragraph describes what some may consider to be a typical North American tourist. It reflects one opinion only. North Americans whovisit foreign countries do not commonly fit this description. Read the paragraph. Then write your answersin English on the answer ...
March 19, 2011

Spanish
? Select the number which best completes this sequence: 200, 400, 600 A. ochocientos <<> my answer B. diez y ocho C. ochenta D. octocientos Which of the following is the Spanish equivalent of 1,946? A. un mil noventa cuatro y seis B. uno nueve cuatro seis C. ...
March 19, 2011

Spanish
Muchas gracias
March 19, 2011

Spanish
I'm not sure if this is the proper way to write the numbers in spanish . can you correct any mistakes please. 6. dos x cien = doscientos 7. tres x cien = trescientos 8. cinco x cien = quinientos 9. ocho x cien = ochocientos 10. nueve x cien = novecientos 11. quince x diez...
March 19, 2011

Spanish
Each of the Spanish sentences below is incorrect in either grammar or meaning. Rewrite each sentence correctly. 1.La princesa todavía canta. The princess used to sing. my answer: La pincesa cantaba. 2.¿Con quién llora la reina? Who does the queen sing with...
March 19, 2011

Spanish
Each of the Spanish sentences below is incorrect in either grammar or meaning. Rewrite each sentence correctly 1. El rey que canta está tocando el tambor. The king that used to sing is playing the drum. Can you check my answer: El rey que cantaba está tocando el ...
March 19, 2011

Spanish
Choose the grammatically correct sentence. A. He aquí una blanca cosa. B. He aquí las cosas blancas.<<> my answer C. He aquí unas cosas blanca. D. He aquí la cosas blancas. Can you explain to me the difference between the choices.
March 18, 2011

algebra
the equation of line is y=mx+c where m is the slope of the lines i.e inclination on x axis . since both the lines have the same slope i.e 2, they r parallel to each other.
March 18, 2011

science
bcoz of the latitudes and longitudes.
March 18, 2011

Spanish
Choose the grammatically correct sentence. A. Está cosa es un lápiz amarillo.<<X B. Esta cosa es un lápiz amarillo. C. Esta cosa es una lápiz amarilla. D. Esta cosa es unas lápiz amarilla. <<X Not sure between B or C un or una ??
March 18, 2011

Spanish
Choose the sentence which correctly says "He doesn't like to eat." A. Gusta no comer. B. El no gusta comer. C. Comer no gusta. D. No le gusta comer.<<?
March 18, 2011

Algebra II
Thank you c:
March 17, 2011

Algebra II
I first want to make it clear that I have only taken Geometry, Algebra I, and pre-Algebra. That seemed to clear things up last time. Question: Matt bought a car at the cost of 25,000 dollars. This car's value goes down 15% every year. 1. What is the decay factor? 2. Write ...
March 17, 2011

algebra
no
March 17, 2011

Spanish
Choose the sentence which correctly says "The king doesn't like to smoke." A. Al rey no le quiere fumar. B. Al rey no le gusta fumar. C. El rey no gusta fumar. D. El rey no quiere fumar.
March 17, 2011

Spanish
8 - B Africa doesn't change size, not used as location here. Africa is not as large as Eurasia. 7 - C
March 16, 2011

Spanish
Because underline doesn't show I will replace the underline with parentheses. I hope it's less confusing. 6. Choose the sentence in which the underlined word is grammatically correct. A. Esta varilla negra (está) parada sobre otra cosa negra. B. Esta varilla ...
March 16, 2011

Spanish (double check my work please)
the words with ("") are underlined.
March 16, 2011

Spanish (double check my work please)
Choose the sentence in which the "" word is grammatically correct. A. Esta varilla negra "está" parada sobre otra cosa negra. B. Esta varilla negra "esta" parada sobre otra cosa negra. C. Esta varilla negra "es" parada sobre otra ...
March 16, 2011

Calculus (double check my anser please)
Evaluate integral e^3x cosh 2x dx. A.1/2 e^5x + 1/2 e^x + C B.1/10 e^5x + 1/2e^x + C<<< my answer C.1/4e^3x + 1/2 x + C D.1/10 e^5x + 1/5 x + C
March 13, 2011

Calculus (Please Check my answers)
thank you so much MathMate .
March 13, 2011

Calculus (Please Check my answers)
Find the average value of the function i=15(1-e to the power of -1/2 t) from t=0 and t=4? A.7.5(1+e^-2)<< my answer B.7.5(2+e^-2) C.7.5(2-e^-2) D.7.5(3-e^-2) Find the rms value of the function i=15(1-e to the power of -1/2 t) from t=0 and t=4? A.7.5 sqrt 1+4e^-2 -e^-4 &...
March 13, 2011

Calculus (please check my answer)
Find the Avrage value of the function i=15(1-e to the power of -1/2 t) from t=0 and t=4? A.7.5 sqrt 1+4e^-2 -e^-4 <<<<not sure though B.7.5 sqrt 4-2e^-2 + e^-4 C.7.5 sqrt 4+4e^-2 - e^-4 D.7.5 sqrt 5-2e^-2 + e^-4
March 13, 2011

Calculus (double check )
Find the centroid of the area bonded by the parabola y =4-x^2 and the x-axis? A.(0,1.6) <<<< correct? B.(0,1.7) C.(0,1.8) D.(0,1.9)
March 13, 2011

calculus
Find the area under one arch of a cycloid described by the parametric equations x=3(2theta -sin2theta) & y=3(1-cos2theta) use 0 and pi for te limiting values of. A.9pi B.18pi C.27pi D.36pi
March 13, 2011

Calculus
Evaluate (integer sign)dx/sqrt9-8x-x^2 A.sin^-1 (x + 4/5) + C B.sin^-1 (x - 4/5) + C C.Ln Sqrt9-8x-x^2 + C D.Ln (-8 - 2x) + C B or C ?
March 13, 2011

Calculus
C ?
March 12, 2011

Calculus
1.evaluate (integral sign)x cos 3x dx A.1/6 x^2 sin 3x + C B.1/3 x sin 3x -1/2 sin 3x +C C.1/3 x sin 3x +1/9 cos 3x +C << my choice. D. 1/2 x^2 +1/18 sin^2 3x +C 2.evaluate (integral sign)xe(power of 2x)dx A.1/6 x^2 e(to the power of 3x)+C B.1/2 xe(to the power of 2x)-1/...
March 12, 2011

Calculus (check)
Evaluate (integer sign)dx/sqrt9-8x-x^2
March 12, 2011

Calculus (check)
Evaluate ç dx/sqrt9-8x-x^2 A.sin^-1 (x + 4/5) + C B.sin^-1 (x - 4/5) + C C.Ln Sqrt9-8x-x^2 + C D.Ln (-8 - 2x) + C B or C ?
March 12, 2011

calculus
Thank you.
March 12, 2011

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