Monday
April 27, 2015

Posts by Dan


Total # Posts: 949

Physics
A 30.0 ball rolls around a 50.0 -diameter L-shaped track, shown in the figure, at 60.0 . What is the magnitude of the net force that the track exerts on the ball? Rolling friction can be neglected.
March 15, 2011

Physics
A rocket-powered hockey puck has a thrust of 2.40 and a total mass of 1.40 . It is released from rest on a frictionless table, 2.90 from the edge of a 1.80 drop. The front of the rocket is pointed directly toward the edge. How far from the table does the puck land?
March 15, 2011

chemistry
What reagent converts sodiumethanoate to methane?
March 15, 2011

math
The larger circle has a radius that is 18 inches longer than the smaller circle. The larger circle has a circumference that is A pi feet larger then the smaller circle. find the value of a.
March 15, 2011

BIOCHEM
what are the problems created by using molecular oxygen as a recipient of the electrons from the oxidation of carbon compounds.
March 14, 2011

math
How do you find the circumference of a circle?
March 14, 2011

yes
Using your current work organization (or an organization of interest) as the subject matter, research the elements of business and prepare an APA formatted paper that:
March 13, 2011

science
Start early - plant germination takes time regardless of the plant. Also you must be sure to replicate each plants environment as much as possible. Same potting soil, same sunlight, same amounts of liquid at the same time. Also you should have a control group. Since you are ...
March 7, 2011

Chemistry
Calculate the mass of sodium bicarbonate needed to neutralize 3.0 mL of 3.0 M HCl. Show your work.
March 2, 2011

Chemistry
Calculate the mass of sodium bicarbonate needed to neutralize 3.0 mL of 3.0 M HCl. Show your work.
March 2, 2011

Physics
conical pendulum is formed by attaching a 0.200 ball to a 1.00 -long. It has a radius of 40.0cm . What is the angular velocity of the ball if the tension in the string is 2.14N?
March 1, 2011

Physics
conical pendulum is formed by attaching a 0.200 ball to a 1.00 -long. It has a radius of 40.0cm . What is the tension in the string?
March 1, 2011

Physics
conical pendulum is formed by attaching a 0.200 ball to a 1.00 -long. It has a radius of 40.0cm . What is the tension in the string?
March 1, 2011

Physics
conical pendulum is formed by attaching a 0.200 ball to a 1.00 -long. It has a radius of 40.0cm . What is the tension in the string?
March 1, 2011

math
Not enough information. However, if the problem gave Harry's total amount of money, or a percentage based on the 12 dollars spent, it would be solvable. Think about how you would solve it if this information was given.
February 28, 2011

math
Make an estimation of how many weeks are in a month. Calculate how many total weeks there are in 8 months. Multiply the weekly gas expense by the total number of weeks.
February 28, 2011

8th grade science
velocity is speed with direction For example.... An airplane is flying East at 300 miles per hour Its speed is 300 miles per hour Its velocity is 300 miles per hour East
February 28, 2011

physics
Frequency is the number of waves that pass by in one second. You know that 8 waves pass by in 30 seconds. How many pass by in 1 second? Period is the time it takes for one wave to pass by. Period is the inverse of frequency (T = 1/f). Wavelength is the distance measured from ...
February 28, 2011

Physics
This problem can be solved with the conservation of energy. The total amount of energy in the car is the same before and after the collision with the spring. The car's kinetic energy before the collision is completely converted to spring potential energy after the ...
February 28, 2011

English
Is "after the hurricane" a pharase or clause?
February 27, 2011

science
The best thing I have done for conversions throughout all of my education was learn this saying: Kings over Humans over Dragons over Dogs over Cats over Mice (or if you prefer: "King Henry Died Drinking Chocolate Milk) broken down that gives: K H D * D C M this is short ...
February 27, 2011

Math
u x 6 2/3=20
February 26, 2011

PHYSICS
The weight of fully saturated soil in a prism having a 4.00 sq. ft. base (or a base of 4.00 ft*ft) is 4,000 lbs. Pore pressure at the base is 499 lbs/(ft*ft). True or False: The effective stress at the base is 501 lbs/(ft*ft).
February 26, 2011

Math-Statistics
D. Within 239 to 507 minutes.
February 21, 2011

Physics (Force and Motion)
392 N
February 19, 2011

groundwater science
Assume that a losing stream exists in physical connection with groundwater in an isotropic unconfined aquifer. Assume that several contour lines of equal head cross the stream and intercept it. These contour lines of equal head are "V-shaped", with the point of the &...
February 19, 2011

Math/Radioactive Dating
No Calculator Necessary. Age 0: 0 Ar40 Age 1.25 billion years: half of the K40 is now Ar40, so 1 part of K40 and 1 part of Ar40 Age of 2.5 billion years: one quarter K40 and three quarters Ar40; so 1 part K40 to 3 parts of Ar 40
February 19, 2011

Physics-Resonance
A 3.00 m long pipe is in a room where the temperature is 20 C. What is the fundamental frequency if the pipe is closed at one end? Would this count as an open pipe still, or a closed pipe? This is what I did. Wavelength = 2L/n Wavelength = 2(3)/1 Wavelength = 6 (331 + (.6*20...
February 14, 2011

chemistry
19. Convert 15 ppm of benzene to mg/m3 at 20 oC and 720 torr Density of a gas is g/L = P(MW)/RT (740 torr x 1 atm/760torr)(78.114g/mole)/ (.0821L atm/mole K)(293K) = 3.16g/L 1ppm =1 L Benzene/106 L of air = 1L ben/1000 m of air = 0.001 L ben/m3 = 0.00316 g/m3 x/3.16=15 = 47....
February 14, 2011

CHEMISTRY
19. Convert 15 ppm of benzene to mg/m3 at 20 oC and 720 torr Density of a gas is g/L = P(MW)/RT (740 torr x 1 atm/760torr)(78.114g/mole)/ (.0821L atm/mole K)(293K) = 3.16g/L 1ppm =1 L Benzene/106 L of air = 1L ben/1000 m of air = 0.001 L ben/m3 = 0.00316 g/m3 x/3.16=15 = 47....
February 14, 2011

CHEMISTRY
19. Convert 15 ppm of benzene to mg/m3 at 20 oC and 720 torr Density of a gas is g/L = P(MW)/RT (740 torr x 1 atm/760torr)(78.114g/mole)/ (.0821L atm/mole K)(293K) = 3.16g/L 1ppm =1 L Benzene/106 L of air = 1L ben/1000 m of air = 0.001 L ben/m3 = 0.00316 g/m3 x/3.16=15 = 47....
February 14, 2011

CHEMISTRY
Benzene equals 78.11 grams/mole
February 14, 2011

CHEMISTRY
Grams/mole benzene
February 14, 2011

science
12. Aluminum in blood plasma was shown to undergo a first order elimination reaction with a half-life of 160 days. If the initial concentration was 8.2 µg/L, how long will it take for the concentration to drop to 2.5 µg/L?
February 13, 2011

groundwater science
For one dimensional flow, what is the flow rate in a 2.0-m long sample of clean saturated sand having a cross-sectional area of 0.05 m2, and a hydraulic conductivity value of 10-3 m/s, if the drop in head over the length of the sand sample is 0.03 m?
February 11, 2011

Physics
Two waves are combined to form this standing wave equation of y(x,t) = (3 mm)sin[x/(2 m]cos[(100 rad/s)t] a. What's the amplitude of the right moving wave and left moving wave? b. What's the wavelength of the right moving wave and left moving wave? c. What's the ...
February 11, 2011

Physics
For the second part, since this is a sine function, there's a particular angle that would have the same value as 0.8333. Like sin(0 deg) and sin(180 deg) equals to 0. So I did 180 - 56.4 to get that particular angle. Once I got that, I converted it to radians and repeated ...
February 6, 2011

Physics
Thanks, I wasn't able to get the second part of the answer (got a spring constant of 24.21 N/m) correct though.
February 6, 2011

Physics
A particle of mass m = 0.40 kg oscillates on the end of a spring with an amplitude of 0.30 m. At t = 0, it's at it's equilibrium position (x=0) and is moving in the positive x-direction. At 0.20 s later it is at x = 0.25 m. a. What is the lowest possible value for the ...
February 6, 2011

soil science
True or False: for a particular soil, pressure just under the water table is negative
February 5, 2011

groundwater science
what is weight density (lbs/ft3)of a fluid filling a cylinder 1.4 ft high and cross section area of 0.2ft2 if the fluid weighs 15.1 lbs?
February 4, 2011

MGT 460 Leadership Priorities & Practice
does not suggest that Catherine goes to see every romantic comedy that plays at her local movie theater
February 4, 2011

Math
Moira paid $4.50 for a movie and 2 bags of popcorn. All together she spent 6 dollars. What's the cost for a bag of popcorn?
February 3, 2011

marketing
What are the three essential lessons from Theodore Levitt's Marketing Myopia?
January 30, 2011

Pre Calc
√(x+2) -7 =√(x+9)
January 23, 2011

Calculus
√(x+2) -7 =√(x+9) If you could show your work on how to get the answer that would be awesome. I really need to learn how to do this
January 23, 2011

physics
A space vehicle is coasting at a constant velocity of 20.5 m/s in the +y direction relative to a space station. The pilot of the vehicle fires a RCS (reaction control system) thruster, which causes it to accelerate at 0.390 m/s2 in the +x direction. After 49.0 s, the pilot ...
January 21, 2011

literature ... i really need corrections
thank you...
January 21, 2011

english.. can u tell me if my answers are right
1)c 2)c 3)c 4)c .. k this looks ridiculous but i think the answers are all C !!! please check!!! 1) At the end of the poem(song of myself number 52), the speaker a.proclaims his love to democracy b. encourages us to read more of his poems c. reaffirms his link to the reader d...
January 21, 2011

english
i've read most of these sites but couldn't really make sure of my answers i mean for example number 1 i was and still is confused between a and d ... i am not really able to comprehend the question. do you think my answers are right? it would really help
January 20, 2011

english
1) The tone in the song of myself number 52 is best described as a. lighthearted b. bombastic c. detached d. intimate 2) Which images best appeals to the sense of hearing or sound? a. "the spotted hawk swoops by and accuses me he complains of my gab and my loitering"...
January 20, 2011

COM/155
Use at least five adverbs and five adjectives to write a brief review of a movie, sporting event, musical performance, or television show. Bold each adverb. Underline each adjective. Compare the event to one or more similar events. When comparing, use at least three ...
January 15, 2011

COM/155
thank you!
January 15, 2011

COM/155
Since attending Axia College, I am a better writer. I am more concise and more accurate. Therefore, I am a more effective writer. I have learned how to better express myself. I am not the best academic writer or the most prolific, but I can honestly say that since I have been ...
January 15, 2011

COM/155
okay! thanks!
January 15, 2011

COM/155
Compare and contrast your abilities as an academic writer now as opposed to when you began at Axia College. Using four comparatives and four superlatives within your responses, explain what has led to these changes and what changes you will make in the future. My reply: Since ...
January 15, 2011

com/155
I have never owned a credit card. I do not believe in them and I do not plan on ever owning one. I do not know what my credit score is because it usually cost money to get a credit check. However, I believe that my credit score is low, because of hospital bills. As of right ...
January 13, 2011

com/155
Review pp. 517–520. Describe your experience with credit and credit cards in a brief paragraph using at least five adverbs and five adjectives in your description. Bold the adverbs and underline the adjectives. What is the most effective way to determine whether a word is...
January 13, 2011

11th grade specialist math
Thanks for the reply. I'm still stumbling over where point C is. "Drop perpendiculats parallel to the sides of the rectangle until they meet". A diagram would most definately be helpful. Once again, thank you for your help.
January 12, 2011

11th grade specialist math
I'm not sure whether this question is too difficult, or perhaps it is lacking a diagram, but I have been getting no response to this question, something I had not been not expecting. To any maths experts out there, I would absolutely LOVE your help, because I just can'...
January 12, 2011

math
Thank you so much!! Your explanation was very clear! Thank you for your help!
January 11, 2011

math
A shaded circle just fits inside a 2m x 3m rectangle. What is the radius in metres, of the largest circle that will also fit inside the rectangle but will not intersect the shaded circle? Drawing a diagram would help with this question. Thanks.
January 11, 2011

com 170
write a brief paragraph about which paragraph was more effective and analyze why this is so from chapter 32 real essays with readings appendix g include a discussion of sentence variety and rythem of the author's writing
January 11, 2011

math
yup.. it didn't work... it deleted all my spacing.. please ignore the above post.
January 11, 2011

math
---------------------- I/ \/ ?? \I I \ rad I I2m diameter I----I I circle I I I / I I\ / I ---------------------- okay... my attempted diagram.. It probably won't show up correctly when i post it, and confuse everyone more... but i thought I'd give it a shot.
January 11, 2011

math
A shaded circle just fits inside a 2m x 3m rectangle. What is the radius in metres, of the largest circle that will also fit inside the rectangle but will not intersect the shaded circle? ------------------------------------------ I have a diagram with me, but I don't ...
January 11, 2011

com 170
write a brief paragraph about which paragraph was more effective and analyze why this is so from chapter 32 real essays with readings appendix g include a discussion of sentence variety and rythem of the author's writing
January 11, 2011

com 170
identify the three key parts of a paragragh. discuss their relationship with one another.
January 11, 2011

4th grade math
3/4*
January 10, 2011

4th grade math
gina is correct because 3/4 equals 0.75. 4/5 is bigger than 3/5 by 1/20.
January 10, 2011

Math
thanks!
December 20, 2010

Math
make a conjecture (obsevations based on patterns) for each sequence below. a)7,10,13,16 b)4,44,444,4444,44444 c)2,10,50,250 d)1,2,6,42,1806,3263442 i got some of them but i think they need to be writen better a)Add three to each number to get the next number in the sequence. b...
December 20, 2010

physics
Sam tosses a ball horizontally off a footbridge at 3.2 m/s. How much time passes after he releases it until its speed doubles?
December 20, 2010

Math
could you please solve the problem completely .. i am still confused. Thanks.
December 19, 2010

Math
Given [(x-5)/(x-3)]^2 . Find any stationary points and any points of inflection. Also find any horizontal and vertical asymptotes.
December 19, 2010

Math
Given y = x^4 − 4x^2 + 50. Find any extrema and any points of inflection
December 19, 2010

Calculus 1
Given y = x^4 − 4x^2 + 50. Find any extrema and any points of inflection
December 19, 2010

Math
how did you get x to equal 400
December 17, 2010

Math
to identical jars are filled with equal amount of marbles. the marbles are coloured red or white. the ratio of red to white marblesis 7:1 in jar 1 and 9:1 in jar 2. if there are 90 white marbles altogether, determine the number of red marbles in jar 2.
December 17, 2010

Chemistry
How many grams of iron can be produced of 156000 calories of heat are absorbed by a large enough sample of iron III oxide
December 12, 2010

Calc
express 3ln(r)- 5ln(s)+ 7ln (t) as a single logarithm.
December 9, 2010

chemistry - chromatography
We used three different color dyes in both alcohol and water. So its the chemical makeup of each color that determines the Rf value?
December 8, 2010

chemistry - chromatography
Hello, can you tell me why different colors have different rf values
December 8, 2010

Basic Electronics
discuss your thoughts on the use of thevenin equivalent circuit.
December 8, 2010

Physics
The displacement from the equilibrium caused by a wave on a string is given by: y(x,t) = (-0.00200 m)sin[(40m^-1)x-(800s^-1)t]. What is the number of waves in 1 m?
December 6, 2010

Physics
Suppose a monatomic ideal gas is changed from state A to state D by one of the processes shown on the PV diagram. Find the total work done on the gas if it follows the constant temperature path A-C followed by the constant pressure path C-D. A = 2atm and 4L C = 1atm and 8L D...
December 6, 2010

physics
A town is planning on using the water flowing through a river at a rate of 5.0X10^6 kg/s to carry away the heat from a new power plant. Environmental studies indicate that the temperature of the river should only increase by 0.50ºC. The maximum design efficiency for this ...
December 6, 2010

chemistry
CuCl --> Cu+ & Cl- Ksp = [Cu+2] [Cl-] ========================= Cu+(aq) + 2 Cl ‾(aq) ==> CuCl2 ‾(aq) K = [CuCl2 ‾] / [Cu+2] [Cl-]^2 =============== (K) (Ksp) = [Cu+2] [Cl-] times [CuCl2 ‾] / [Cu+2] [Cl-]^2 reduces to: (K) (Ksp) = [CuCl2 ‾...
December 4, 2010

chemistry
Find out: a) How many grams of lithium are required? b) How many grams of each product can be produced?
December 4, 2010

Math
the rule is this: A prime can be written as a sum of two squares. I hope that helps
December 4, 2010

com155
ok I got it now.. thank you very much!!
December 4, 2010

com155
The role of education plays a big part in financial planning (PRESENT). It has worked a crucial part of becoming successful with your money (PRESENT PERFECT TENSE). It will help you in learning basic math skills in order to better your finances (FUTURE TENSE). The whole idea ...
December 4, 2010

com155
Okay! I hope this is it. The role of education plays a big part in financial planning (PRESENT). It has worked a crucial part of becoming successful with your money (PAST). It will help you in learning basic math skills in order to better your finances (FUTURE TENSE). The ...
December 4, 2010

com155
OK! I will try going over the site you sent me and try again.. Thanks a lot!
December 4, 2010

com155
HOW ABOUT THIS? The role of education plays a big part in financial planning (PRESENT). It has been a crucial part of becoming successful with your money (PAST PREFECT TENSE). It will help you in learning basic math skills in order to better your finances (FUTURE TENSE). The ...
December 4, 2010

com155
OH! Thank you! I did not know it said that. I am having trouble understanding it. thank you! So, does that mean I have to start all over? Did I at least get all the verbs right?
December 4, 2010

com155
Write five sentences about the role of education in successful financial planning, in which you correctly use a different verb tense in each sentence. Mark each verb used in bold and, in parentheses, identify the specific tense used The role of education plays a big part in ...
December 4, 2010

English 101
MARVELOUS 1. extraordinarily good; used especially as intensifiers 2. too improbable to admit of belief 3. being or having the character of a miracle UNCANNY of a strange nature; weird; mysterious Example That two people could be so alike was uncanny.
December 4, 2010

com155
thank you
December 4, 2010

com155
Yes! That is what I am trying to figure out.
December 4, 2010

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