Friday

May 29, 2015

May 29, 2015

Total # Posts: 966

**Physics**

Finding a Lunar lander's Thrust? A 6000kg lunar lander is in orbit 50km above the surface of the moon. It needs to move out to a 200km -high orbit in order to link up with the mother ship that will take the astronauts home. How much work must the thrusters do in joules?
*April 12, 2011*

**Physics**

An 9.00-cm-diameter, 400 sphere is released from rest at the top of a 1.90-m-long, 20.0 incline. It rolls, without slipping, to the bottom. A) What is the sphere's angular velocity at the bottom of the incline? B) WWhat fraction of its kinetic energy is rotational?
*April 10, 2011*

**physics please help!**

Suppose that 90 g of hot water at a temperature of 75 degrees C is poured into a cavity in a very large block of ice at 0 degrees C. (a) What will be the final temperature of the water in the cavity? (b) What mass of ice must melt in order for the water to cool down to the ...
*April 8, 2011*

**math**

the density of a diamond is 3.52 grams per cubic centimeter. Sally has a diamond that has a volume of 20 mm^3. What is the weight of the diamond?.
*April 6, 2011*

**math**

Thank you!!
*April 6, 2011*

**math**

The density of a crystal is 2.65 grams per cubic centimeter. Ryan has a rectangular prism made of quartz. It measures 10 cm by 10 cm by 6 cm. Find the weight of this crystal in kilograms.
*April 6, 2011*

**math**

i am greater than 15 and less than 40.if you double me, i become a number that ends in 0.1/5 of me is equal to 5.
*April 5, 2011*

**Chemistry**

Thanks a lot man!
*April 3, 2011*

**Chemistry**

The Ksp for a certain metal hydroxide, M(OH)2 (molar mass = 127) is 3.5 × 10-19. What is the pH for a saturated solution of this hydroxide? Confused on how to set up this problem...
*April 3, 2011*

**Maths**

What is 5y=9+2y
*March 30, 2011*

**Physics**

An object initially at a temperature of 80 C cools by 1 C in a time of 15 s when placed in a 20 C room When the object's temperature reaches 50 C, what is the average rate at which the object cools?
*March 28, 2011*

**math**

Consider the polynomial x^3 + 6x^2 + 3x - 10. Without dividing, or graphing, which two of (x+2), (x-2), (x+1), and (x-1) must be factors of the polynomial? Why/how do you know?
*March 27, 2011*

**math**

Find an equation of a polynomial function of degree 5 with integer coefficients with zeros 0, -2, and 1/2.
*March 27, 2011*

**algebra**

Find an equation of a polynomial function of degree 5 with integer coefficients with zeros 0, -2, and 1/2.
*March 27, 2011*

**math**

What percentage of 13,000.00 is 8,000.00
*March 23, 2011*

**Physics**

A 1900 car starts from rest and drives around a flat 50--diameter circular track. The forward force provided by the car's drive wheels is a constant 1300 . A) What is the magnitude of the car's acceleration at ? B) What is the direction of the car's acceleration at...
*March 15, 2011*

**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*