Monday
April 27, 2015

Posts by Frank


Total # Posts: 424

Calc
A stone is thrown straight up from the edge of a roof, 625 feet above the ground, at a speed of 20 feet per second. A. Remembering that the acceleration due to gravity is -32 feet per second squared, how high is the stone 2 seconds later?
April 21, 2015

math
write an addition equation the equation must have a 1 a 2 a 3 digit added and use all of these digits 662-228-8000
April 15, 2015

math/physics
A 8 kg mass is attached to a spring hanging from the ceiling and allowed to come to rest. assume that the spring constant is 40 n/ m and a damping constant is 3 N/m. At t=0 and external force of 2 sin(2t+PI/4)N is applied to the system. determine amp, frequency and steady ...
April 10, 2015

Math i need someone awesome to help! ASAP
which measure correctly completes the statement 627 L = ? mL
March 19, 2015

Geometry
Write the equation of a circle given the following: Diameter measures 15 units and the center is at the intersection of y =x + 7 and y= 2x-5
March 1, 2015

quadratic formula
okay thank you
February 27, 2015

quadratic formula
My chemistry professor wants us to use the quadratic formula
February 27, 2015

quadratic formula
2x^2=-8x+10 I got x=-2-1i x=-2+1i But every time I plug the numbers back into the equation I am not getting the sides to equal. Not sure how to use the imaginary i.
February 27, 2015

solution making/ chemistry/biotech
I thought it did but that's all the question gives you
February 26, 2015

solution making/ chemistry/biotech
You have 750ml's of a solution that was originally made up using a 20X stock. How much stock was used? I think the answer is 37.5 by dividing 750/20 but I am not sure
February 26, 2015

Solution Making
Suppose you start with a 5X solution A, and you want a final volume of 10ul of 1X solution. How much Solution A do you need? Can you please check my work not sure. I need 2 ul of solution A to 8 ul of H2O. 5/1=.2*10=2
February 23, 2015

solution making/ chemistry/biotech
thank
February 23, 2015

COMM/215
I would like to know if i have used the correct grammar and punctuation in the following two sentences: 47. "Have you ever read the story, 'The Tell-Tale Heart' by Edgar Allen Poe?" Dave asked. 48. "Did the professor say, 'Put down your pencils'...
January 31, 2015

COMM/215
I would like to know if i have used properly structured sentences for the following: 49. To succeed in the new economy, workers will have to learn throughout their careers adapt to changing circumstances, and self-motivate when needed. 50. Some students hate math; some ...
January 31, 2015

AP Calc
find f(x), if f'(x)=2x-3 and the graph of y=f(x) contains the point (2,5).
January 19, 2015

algebra
the lenght of a rectangular is 50 feet more than the width,it the perimeter of the basketball court is 300 feet,what is the lenght of the field
January 17, 2015

Intro to computers
You have set up Remote Desktop for the company server running Server 2008 so that your users can RDP in from their XP workstations. Users are calling you saying that they are being denied the ability to remote in. What is the most likely reason? A. XP does not support Remote ...
January 11, 2015

Physics
An object is placed 4 cm in front of a concave lens of focal length 3 cm. Using the lens equation, find where the image will form and state whether it is a real or virtual image.
December 13, 2014

Physics
An object is placed 4 cm in front of a convex lens of focal length 3 cm. Using the lens equation, find where the image will form and state whether it is a real or virtual image.
December 13, 2014

Physics
An object is placed 11 cm in front of a convex mirror of focal length 4 cm. Using the lens equation, find where the image will form and state whether it is a real or virtual image.
December 13, 2014

Physics
857.5hz?
December 13, 2014

Physics
What is the frequency of a sound wave in air at 20°C that has a wavelength of 0.4 m?
December 13, 2014

Physics
Thanks!!
December 13, 2014

Physics
A cubical object of sides 5 cm is immersed completely in water. What is the force of buoyancy on the object? (Assume g = 10 m/s2)
December 13, 2014

physics
Two point charges, each 6*10-5 C, are separated by 30 cm. What is the electrostatic force produced by this arrangement?
December 11, 2014

Physics
Does P=V^2/R seem correct?
December 11, 2014

Physics
A 30 ohm resistor is connected to a 1.5 V battery. How much power is dissipated by the resistor? I'm confused of the formula to use here.
December 11, 2014

Physics
A 4 ohm resistor and 10 ohm resistor are connected in series. If this circuit is connected to a 12 V battery, how much current will flow through the circuit?
December 11, 2014

Physics
A 10 ohm resistor and a 20 ohm resistor are connected in parallel. What is the equivalent resistance of this setup? What formula do I use for this?
December 10, 2014

Physics
Aluminum has a resistivity of 2.7*10-8 Ùm. What would be the resistance of 100 m of aluminum wire with a cross-sectional area of 2*10-4 m2?
December 10, 2014

Physics
How can you demonstrate that water is denser than ice without weighing them? What is the principle involved?
December 10, 2014

Calculus angle of elevation
Bob is wrong dx/dt = 3ft/s, dƟ/dt = ? 5ft/x = tan Ɵ Differentiating each side with respect to the time: (-5ft)/x^2 dx/dt=〖sec〗^2 ϑ dϑ/dt So dϑ/dt=(-5ft)/x^2 dx/dt.〖cos〗^2 θ We want to evaluate the change at the ...
December 9, 2014

chemistry
EDTA: 292.2 1. How would you make 250ml's of a 15% EDTA solution 2.How much of solution 1(above)should be used to make 500ml's of a .1% EDTA solution.
December 5, 2014

Physics
I don't get it
November 16, 2014

Physics
A ball is thrown horizontally from the top of a building 45.9 m high. The ball strikes the ground at a point 121 m from the base of the building. The acceleration of gravity is 9.8 m/s2 . Find the time the ball is in motion. Answer in units of s Find the initial velocity of ...
November 16, 2014

physics
THANK YOU I actually needed only the second part and I did the same as u but I forgot to put parentheses!
November 16, 2014

physics
A descent vehicle landing on the moon has a vertical velocity toward the surface of the moon of 22.7 m/s. At the same time, it has a horizontal velocity of 58.9 m/s. At what speed does the vehicle move along its descent path? Answer in units of m/s At what angle with the ...
November 16, 2014

Math
Np
November 16, 2014

Math
28 inches
November 16, 2014

Advanced Algebra
The polynomial function defined by f(x) = 1 − x + x^2 − x^3 + ... + x^16 − x^17 may be written in the form f(y) = a_0 + a_1 y + a_2 y^2 + ... + a_16 y^16 + a_17 y^17, where y = x + 1 and a_i s are constants. Find a_2.
November 15, 2014

Calculus
Find the points at which y = f(x) = x^11-6x has a global maximum and minimum on the interval 0 ¡Â x ¡Â 4 Round your answers to two decimal places. Global Maximum: (x,y) = (,) Global Minimum: (x,y) = (,)
October 29, 2014

physics
Find the x- and y-coordinates of the center of gravity of a 4.00 ft by 8.00 ft uniform sheet of plywood with the upper right quadrant removed as shown in the figure below. The dimensions of the cutout are a = 4.50 ft and b = 1.70 ft. HINTS: Think of the board as being made of ...
October 28, 2014

physics
Traveling at a speed of 19.5 m/s, the driver of an automobile suddenly locks the wheels by slamming on the brakes. The coefficient of kinetic friction between the tires and the road is 0.740. What is the speed of the automobile after 1.21 s have elapsed? Ignore the effects of...
October 18, 2014

Math College (Algebra)
How to solve this system? x + [(3x-y)/(x^2+y^2)] = 3 y - [(x+3y)/(x^2+y^2)] = 0
October 11, 2014

physics
A 20 kg object is acted on by a conservative force given by F = -3.0 x - 5.0 x 2, with F in newtons and x in meters. Take the potential energy associated with the force to be zero when the object is at x = 0. (a) What is the potential energy of the system associated with the ...
October 9, 2014

chemistry
Suppose 1.2x10^3 kg of C is mixed with 2.4x10^5g oxygen gas and carbon dioxide forms. 1. write the reaction and balance 2.which reactant is the limiting reagent and which reactant is in excess 3. How many grams of carbon dioxide will be formed.
September 27, 2014

Fractions
How many 1/4 cup servings are in 5/6 cup of raisins?
September 23, 2014

chemistry
thank you, i forgot to convert the mols, once i put that part in. I got about the same thing as you
September 22, 2014

chemistry
A 2.556g sample of baking soda (NaHCO3)decomposes to produce 0.876g of solid sodium carbonate. Caculate the theoretical yield and the percent yield of the sodium carbonate. The equation is: 2NaHCO3(s) -> Na2CO3(s) + H2O + CO2(g)
September 22, 2014

chemistry
Calculate the number of moles of O atoms in a 2.5x10(-6)kg sample of C8H10N4O2
September 20, 2014

chemistry
thank you
September 20, 2014

chemistry
Calculate the number of C atoms in a .25mg sample of C8H10N4O2
September 20, 2014

chemistry
balanced equation =2 H(2)+ 1 O(2) -> 2H(2)O A. What mass of H2O would be produced from7.4 mg of O2 B. What is the volume of H2O would be produced from 7.4kg of O2. Density of water = 1.000g/ml
September 20, 2014

Economics
Country A is producing 4 units of X and 8 units of Y and country B is producing 4 units of X and 6 units of Y. The opportunity cost of producing more of A) good X is the same for both countries. B) good Y is the same for both countries. C) good X is lower in country A. D) good...
September 15, 2014

Physics
At some instant, a particle traveling in a horizontal circular path of radius 7.80 m has a total acceleration with a magnitude of 15.0 m/s2 and a constant tangential acceleration of 12.0 m/s2. Determine the speed of the particle at this instant(initial speed) and (1/8) ...
September 12, 2014

chemistry
You have a protein solution of 3.7mgs/ml You need to load 20ug onto a gel. How much of this solution would you use ?
August 27, 2014

chemistry
thanks that is exactly how the teacher gave us the questions
August 27, 2014

chemistry
How would I make 500 ml's of a .35M NaCI solution. MW= 58.44 ( I know how to do the first part) How many micromoles of NaCI would be present in that solution? What would be the percentage of NaCI in that solution?
August 27, 2014

Math
You ride your bike at an average speed of 8 miles per hour.how many miles can you travel in 1.5 hours?
August 17, 2014

statistics
Suppose a study is done in which several random samples of people from a population are taken and polled on the number of hours per night they sleep. It is determined that the sample proportion for those who sleep at least 8 hours a night is 36%, and the 95% confidence ...
July 19, 2014

math
Frank was a jacket that cost $60 ESA $43 what is the fraction of the amount that he that he needs to saved
June 3, 2014

Science
whats the answer 4 ?
May 29, 2014

Albebra
2 dice are rolled.What is the probability that neither both numbers are 2's or their sum is less than 6?
May 28, 2014

u.s. history
What was the prevailing economic challenge the United States faced at the start of World War II
May 14, 2014

English
Thank you very much. I still have these sentences I'm doubtful about. My doubt is whether I should use the present perfect or the simple past (considering that it is the end of the school year) 1) Exercises for literary text analyses aimed at developing lexicon have been ...
May 12, 2014

English
Can someone check the grammar in the following sentences? Thank you in advance. 1) The nuclear power station can give our town a lot of energy and jobs to people. 2) We won't be able to use the farmland near the power station because it will be polluted with chemicals. We ...
May 12, 2014

C++
The variables arr1 and arr2 have been declared as pointers to integers . An array of 10 elements has been allocated, its pointer assigned to arr1, and the elements initialized to some values . Allocate an array of 20 elements , assign its pointer to arr2, copy the 10 elements ...
March 16, 2014

Math
kim has 4/10 of a dollar. Carla has 40/100 of a dollar. Who has more money? Explain Colin has 3 quarters. He says he has less than 8/10 of a dollar. is he correct? Explain.
March 6, 2014

English
Can someone help me with these sentences? Which of them are grammatically correct? Thank you very much in advance. 1) They are not able to dance well. 2) They can't dance well 3) Are you able to play the piano? 4) Can you play the piano? 5) Were you able to find the book ...
February 27, 2014

English
Can someone explain to me the difference between angry about and angry for (when a verb follows)? I think "about" is used in sentences like: he is angry about being in jail (Would "for" be possible in this sentence?) he is angry with me for being rude to ...
February 24, 2014

English
Can someone check if the questions and the sentences are grammatical? Thank you. 1)Can you fly with a Bergonian passport? 2) Why might visitors not be welcome on Seeland? 3) What are the citizens of the Aerican Empire like? 4) What happened to Danny when he accepted his friend...
February 20, 2014

English
Yes, I wrote the sentences incorrectly: Thank you He was seen to watch the TV He is still dependent on ... but independent of.... I was so angry WITH him FOR behaving like that in front of everyone. (about behaving would be a mistake?) The teacher was annoyed WITH me FOR ...
February 15, 2014

English
Can someone check if the following prepositions/verbs are correct? Thanks 1) I couldn’t help CRYING 2) It’s no use EXPLAINING it to him; he won’t understand. 3) He was seen TO the watch. 4) I can’t afford TO BUY it. 5) Norma is anxious ABOUT making the ...
February 14, 2014

eNGLISH
Can you please tell me if the sentences are grammatically correct? e.g. "facing death" or the ability to face death Hamlet doubtful about the existence of an afterlife.
February 14, 2014

English
Can someone check these sentences, please? I thank you in advance. 1) Lady Macbeth "becomes sleepwalking" 2) Cowardice is the ability to bear the sorrows of our life and to stay alive, while courage is facing death by committing suicide 3) We can't be sure about ...
February 14, 2014

math
square root of [2+(square root of 1+k)]=square root of 5. Solve for k
February 5, 2014

math
square root of 2+(square root of 1+k)equals the square root of 5. Solve for k
February 5, 2014

algebra
square route of 2 plus the square route of 1 plus k = 2.24
February 5, 2014

English
Can someone please help me check the grammar in the following sentences? 1) I would like to inform people about the danger (after effects?) of having a nuclear power station near our town 2) I hope you will listen to our advice. 3) Animal and plant species will be in danger.
January 27, 2014

SAT prep help
If x^4=10, what it x^6?
January 25, 2014

English
Can someone of you check these sentences, please? Thank you in advance. 1Complete the sentences with the correct form of should, must or have to. 1You _________ be worried. This test is very easy. (don’t have) 2All the students _________arrive on time. (must) 3In my ...
January 24, 2014

English
Can someone check if the following questions are grammatically correct? Thank you. 1)Please Henry the VIII rule by focusing on the following: -Why he broke ties with the church -What the Act of Supremacy established -What political and social changes the reformation brought ...
January 20, 2014

English
Can someone tell me what's the British for the words "common trash barrels", "sorted trash", "regular kitchen" trash or food/garden waste? Thank you I'm quite environmentally friendly. I have three containers at home into which to sort my ...
January 14, 2014

English
Can someone help me with these sentences, please? Thank you very much in advance. I use the Internet to conduct school research, use translation programmes, use an online homework agency, do online shopping, play games, chat with my friends, send private instant messages, log ...
January 9, 2014

English
Can someone check these sentences, please? I need to prepare them for Tomorrow. 1) Air pollution is mainly caused by gases from factories and car exhaust fumes. It can cause acid rain, breathing problems and it can increase the risk of cancer. 2)The destruction of the ozone ...
January 8, 2014

English
Just one more thing. Which of the following sentences are grammatical? Thank you very much for your cooperation. 1.I spent most of my holiday at home. 2. I spent the greatest part of my holiday at home. 3. I mainly/mostly stayed at home during my holiday. 4.For the most part, ...
January 7, 2014

English
Are both skiing Holiday and ski Holiday possible? Thank you.
January 7, 2014

EARTH SCIENCE
the answer to 1 is not D!
January 7, 2014

English
Can you tell me if the expression the most part of my holiday is a mistake? I used it once instead of the greatest part of.. Thank you.
January 7, 2014

math
if 3a+3(b+1)=c, what is b+1 in terms of a and c?
December 21, 2013

English
I left out these last sentences. Thank you. 1) My parents like my clothes style very much and not They like so much my clothes style. 2) My favourite style is the urban look because it is comfortable enough for school. 3) Each of you will have to join one of the four groups ...
December 20, 2013

English
Can you please check these sentences I'm doubtful about? Thank you very much. 1) My parents like my clothing style because they think that wearing practical clothes is the most important thing/most important is to wear practical clothes/ 2) I was given these trousers for ...
December 20, 2013

English
Can you please check these sentences? Thank you very much in advance and Merry Christmas! 1) The Key-Note begins with an extended description of Coketown, the fictional setting for the novel, which is based on Preston, now part of greater Manchester, where Dickens went in 1953...
December 18, 2013

English
I still have a few doubts. Thank you very much. 1) When I go to a party, I generally wear clothes which are smarter than the ones I wear for school. 2) I want to be original and on fashion (is it possible?) 3) What do you think of/about this coat? Are both "about " ...
December 13, 2013

English
I urgently need your help with a few sentences. Can you tell me which alternatives are possible? 1) What do you think of/about these shoes? 2) AlL the ones I have been shown are uncool 3) all of the ones I have been shown... 4) He was given two weeks by the judge in which to ...
December 12, 2013

Math
A football arena measures 100ft. wide by 200ft long.The games are played on a similar rectangular field that's 150ft. long. What is the width of the football field? What is the perimeter of the football field?
November 10, 2013

Math
A faulty odometer (mile indicator) on a car registers 6 miles for every 5 miles travelled. A t the start of a journey it reads 500 miles and at the end of the journey it read 560 miles. What distance has actually been covered?
November 2, 2013

Math
The Japanese Nozomi averages 162 miles per hour. About how many miles would it take the Nozomi to travel 119 miles? Thanks, (If you could please show me how to do it)
October 27, 2013

Physics Classical Mechanics
Double star system answer - 9.859*10^17 seconds; keep on getting bungee jump wrong; I might be using the wrong equation. setting the equations to: 1/2*k*x^2=m*g*h; k = 2*m*g*h/x^2
October 21, 2013

physics
Use the answer from a (R) to calculate the escape velocity
October 19, 2013

  1. Pages:
  2. 1
  3. 2
  4. 3
  5. 4
  6. 5
  7. Next>>

Members