Thursday
October 23, 2014

Posts by TOM


Total # Posts: 1,101

physics
A car accelerates uniformly from rest to a speed of 73.6 mi/h in 7.68 s. How do i find the distance the car traveled during this time, in units of m
October 22, 2014

physics
A car accelerates uniformly from rest to a speed of 73.6 mi/h in 7.68 s. Find the constant acceleration of the car. Answer in units of m/s 2
October 21, 2014

tech math
how to solve one pulley is 7 cm larger in diameter than a second pulley. the larger pulley turns at 80 rpm, and the smaller pulley turns at 136 rpm. what is the diameter of each pulley
October 19, 2014

Calculus
That silly quotient rule! Thanks.
October 19, 2014

Calculus
Find f''(1/2) using f(x) = ln(1-x). f'(x) = 1/(1-x) * -1 = -1/(1-x) so then using quotient rule: f''(x) = ((-1*-1) - ((1-x)(0))) / (1-x)^2 f''(1/2) = 1/(1-(1/2))^(2) = 4 Is this correct?
October 19, 2014

Calculus
This is great, thank you!
October 19, 2014

Calculus
What is the derivative of (ln(x))^x ? I have: f(x) = ln(x)^x f(x) = xlnx f'(x) = x/x + 1 * ln(x) f'(x) = 1 + ln(x) Is this correct?
October 19, 2014

english
Identify Prepositional Phrases: Last summer our whole family hiked up a mountain.
October 18, 2014

Physics - Second Law Question
the space shuttle engines cause an upward force of 3 x 10 ^5 N to act on the shuttle. gravity pulls down on the shuttle with a force of 1.96 x 10^5 N. what is the net force on the shuttle? what is the direction of the net force?
October 15, 2014

Physics - Second Law Question
A large raindrop falling a cloud is acted on by a gravitational force of 4.9 x 10^-3 N directed downward and a force of air resistance of 4.5 x 10^-3 N directed upward. What is the net force on the raindrop? What is the direction of the net force? Thank you so much!
October 15, 2014

Chem Lab Help- Check Urgent
We had acid base and solid mixture in this experiment. other than these we aren't given anything else. Yes it was an extraction.
October 12, 2014

Chem Lab Help- Check Urgent
Separation of Unknown Compounds ( this is a lab question. we used ether in this experiment)
October 12, 2014

Chem Lab Help- Check Urgent
Suggest another solvent you might use instead of ether. Explain your choice giving the advantages and disadvantages of your choice. I said: Toluene Advantages are: -the vapor pressure of Toluene is less -the freezing point is much lower -low polarity -immiscible in water ...
October 12, 2014

Physics Help Please!!!!
A car is at rest on a horizontal road. What is the value of the frictional force? Explain your answer. A bison stands at rest on the horizontal ground. What is the value of the frictional force? Explain. The normal force always has a direction perpendicular to the surface that...
October 9, 2014

Chem Help Please!
You are provided with 5 M solutions of sodium hydroxide and hydrochloric acid for use in this experiment (Separation). How you would have prepared these solutions. Thanks!
October 8, 2014

Chem Lab Help
You are provided with 5 M solutions of sodium hydroxide and hydrochloric acid for use in this experiment (Separation). How you would have prepared these solutions. Thanks!
October 8, 2014

Engineering Calc.
Water is leaking out of an inverted conical tank at a rate of 6700.0 cubic centimeters per min at the same time that water is being pumped into the tank at a constant rate. The tank has height 7.0 meters and the diameter at the top is 4.0 meters. If the water level is rising ...
October 7, 2014

Intro Physics - Newton's third rule
a piano mover raises a 1000 N piano at a constant speed using a very light rope in a frictionless pulley system. with what force is the mover pulling down on the rope? Show steps please! Thank you!
October 7, 2014

Chem Lab Help
Separation and purification A mixture of benzoic acid, benzaldehyde and butylamine. What kind of experiment should you design to obtain each of the three compounds in a pure state. Just need ideas in order to start this experimental design. Thanks!!!
October 6, 2014

Calculus
let F(x) = f(2x) and suppose that the derivative of F(x) = x^(2). Find the derivative of f(2x).
October 5, 2014

Calculus
Thanks!
October 5, 2014

Calculus
So here is the question: Find and equation of the tangent line to the graph: 4)f(x)=e^(2x) passing through the point (0,0) I find derivative being f'(x) =2e^(2x) Then m = f'(0) = 2 put into point slope formula: (y-y1)=m(x-x1) y-0 = 2(x-0) which comes out to y=2x 0=2x...
October 5, 2014

Calculus
I have y = sin^2(3^(x)) which I rewrite as y = (sin(3^(x)))^2 I got the derivative using the chain rule as the following y' = 3(sin(3^x))^2 (cos(3x)) (3^(x)(ln(3)) Can anyone confirm whether this is right/wrong? Thanks
October 5, 2014

statistics
The police department of a major city has found that the average height of their 1,250 officers is 71 inches (μ = 71 in.) with σ = 2.3 inches.
September 28, 2014

statistics
c. The top 10% of the officers in terms of height also make higher salaries than the shorter officers. How tall does an officer have to be to get in that top 10% group? (I.e. what is the height marking off the top 10 percent?)
September 28, 2014

Physics
An experimenter finds that no photo-electrons are emitted from tungsten unless the wavelength of light is less than 270nm. Her experiment will require photo-electrons of maximum kinetic energy 2.0eV. what frequency of light should be used to illuminate the tungsten?
September 23, 2014

Physics
What is the threshold frequency for the photoelectric effect on lithium (phi= 2.93eV)? What is the stopping potential if the wavelength of the incident light is 400nm?
September 23, 2014

Physics
An FM radio station of frequency 107.7MHz puts out a signal of 50,000W. How many photons/s are emitted?
September 23, 2014

Physics
White dwarf stars have been observed with a surface temperature as hot as 200,000 o C. What is the wavelength of the maximum intensity produced by this star? help please don't know what to do
September 23, 2014

Math
Pay attention in class
September 21, 2014

science
YOU COULD HAVE INFORMED ME OF THAT AN HOUR EARLIER!
September 18, 2014

science
Wow, you make me stay here for nearly an hour to wait for you to answer a question. Thanks. By the way, don't say how you didn't know the answer, you could have informed me of that 50min earlier.
September 18, 2014

science
a student brings in a piece of moldy bread. which microscope would you use to view the mold? why?
September 18, 2014

Math
6
September 18, 2014

science
a student brings in a piece of moldy bread. which microscope would you use to view the mold? why?
September 18, 2014

Physics
How many joules of energy per kilogram of rest mass are needed to bring a spacecraft from rest to a speed of 0.77c?
September 14, 2014

science
Ok not necessarily you but other tutors.
September 12, 2014

science
Ok but you could of said something instead of leaving me hanging waiting for you to answer.
September 12, 2014

science
what the heck ms.sue you literally skipped over my question. i've been next to my computer screen waiting for you to answer my question.
September 12, 2014

science
if the paramecium overheats, what could happen to the metabolism
September 12, 2014

Maths
The first one iswhat angle does a 3.8m ladder make with the ground, if it reaches 2.1m up the wall? The second one is A concreter uses a ramp to wheelbarrow in sand from the ground level to floor level inside a building under construction. Floor level is 75cm above ground ...
September 11, 2014

Computer
Each of the following is a typical feature of a fee-based internet back up service EXCEPT ______. backup to external hard drive universal access file feedback information delayed deletion
September 10, 2014

living enviromentn
graduated cylinder why numbers going up on one side and down on the other side
September 9, 2014

living environment
1) the prefix milli- means 1/1,000. how many times would you have to fill and empty a 10 ml graduated cylinder in order to fill a 1 liter soda bottle? i put 100 times. 2) what are eight examples of liquid products sold by volume
September 9, 2014

living environment
the small spaces which represent millimeters count 9 spaces. i'm not talking about the spaces which represent centimeters
September 9, 2014

living environment
how many small spaces are marked off within 1 centimeter i know 10mm= 1 cm but when i literally count the small spaces, there are nine of them
September 9, 2014

economics
Hello, I am currently busy writing an essay and run against a wall: If government decreases the corporate tax rate, what would be the short-run and long-run effect on the aggregate supply, aggregate demand and Long-run aggregate supply in terms of shifts. (AS-AD Model) Would ...
September 9, 2014

living enviroment
thank you so much
September 8, 2014

living enviroment
never leave the fire on the stop unattended wash your hands after dealing with bacteria or anything dirty if there is broken glass don't pick it up with your bare hands always wear cooking mittens while dealing with hot objects
September 8, 2014

living enviroment
write 8 ways you could apply science safety rules in your kitchen at home.
September 8, 2014

science/math (mean)
Find the mean Sample Value 1- 41.93 2- 12.55 3- 48.07 4- 90.81 5- 18.45 6- 55.81 I came up with 44.60 the online program "said close but check to see if yo made a round error" and at least three decimal places
September 7, 2014

chemistry
Show calculations for how you will prepare 250 mL of 0.1 M AgNO3 solution from solid AgNO3 and water Give the reagent amounts and units.
September 1, 2014

Chemistry
The piperazine content of an impure commercial material can be determined by precipitating and weighing the diacetate: (C2H4)2N2H2 + 2 CH3COOH → (C2H4)2N2H2(CH3COOH)2 In one experiment, 0.3126 gram of the sample was dissolved in 25 mL of acetone, and 1 mL of acetic acid...
August 23, 2014

Chemistry
A 8.5 L sample is collected at 45 degrees C. What will the volume be if the temperature is raised to 70 degrees C.
August 19, 2014

Resume Writing
How would I say that using a resume word?
July 14, 2014

Resume Writing
Hello. I am creating a resume. Under one of my bullet points, I want to say that I write inspirational blogs. How would I say that in the resume way?
July 14, 2014

Math
Thank you so much Ms.Sue! :D
July 11, 2014

Math
what is the sum of a profit 0f $8000 and a loss of $13000? I'm realy struggling and need URGENT Help! plz respond
July 11, 2014

Chemistry
A 56 g sample of peanut oil has a volume of 60.9 cm^3. Calculate the density of the peanut oil.
July 8, 2014

Algebra
Solve equation. -6e^8n+8 -3=-23
July 5, 2014

physics
A sound wave of frequency 1310 Hz., propagating through air at 0 degrees Celsius, has a pressure amplitude of 11.0 Pa. What is the maximum particle speed (in meters/second)?
June 25, 2014

pharmacy
the structural formula of a drug is included in this section of a drug monograph
June 23, 2014

english
I expect a friend to both honest and a loyal pereson
June 17, 2014

english
I want to either study or to work abroad after I graduate.
June 17, 2014

Physics
Explanation of twin paradox in regards to special relativity theory.
June 7, 2014

math
Suppose that inflation is 3% per year. This means that the cost of an item increases by 3% each year. Suppose a jacket cost $150 in 2011. How long will it take for the jacket to cost $300 dollars?
June 4, 2014

math 1 question!!!!!!
No its 14/27. Multiply 2/3 and 7/9.
June 3, 2014

math
I put both systems of equations into the y=mx+b format.
June 3, 2014

math
yes thank you!!!!!!!
June 3, 2014

math
x – 3y = 25 x – 2y = 21 find the x and y values i think x=-13 and y=4 am i right?
June 3, 2014

algebra 2
In how many ways can 6 toy animals be arranged in a line on a shelf if one of the toys is a tortoise and it must be at the end of the line?
June 2, 2014

Physics
A pendulum consists of a swinging mass hanging from a massless string. The hanging mass is 2.0 kg and the string is 400.0 cm long. If the mass has a speed of 8.0 m/s when it passes the lowest point of its swing, a) what is the speed when the string makes an angle of 60.0o with...
May 30, 2014

Calculus
Let t be some fixed real number. Find the volume of the region bounded by y =1/x and the y = 0 on the interval [1, t] rotated about the x-axis. What happens as t → ∞?
May 27, 2014

Chemistry
A student places a zinc electrode in a 0.80 M Zn2+(aq) solution which is connected by an electrolyte to a 1.30 M Ag+ (aq) solution containing a silver electrode. (Note that the solution concentrations are not standard). Determine the initial voltage of the cell at 298 K. Show ...
May 13, 2014

Physics
A box of mass 1.50 kg is given an initial velocity of 12.5 m/s up an inclined ramp that makes an angle of 25.0o with the ground, which is horizontal. The coefficient of kinetic friction between the box and the ramp is 0.240. How long does the box slide up the ramp before it ...
May 13, 2014

Physics
A block is sitting on a rough ramp. It is found that a force of F = 200.0 N (directed up the ramp) is required to keep the box from sliding back down the ramp. The angle 𝜃 is 35.0o and the mass of the box is 150.0 kg. What is the coefficient of static friction between...
May 13, 2014

algebra
solve the system of equation 2x+y=5 y^2-2y=-3x+5
May 6, 2014

algebra
solve each system of equations 1.4x-0.5y=1.3 0.4x+1.1y=4.1
May 5, 2014

algebra
assuming the distance between points (2,-3) and (-1,y) is 5 units, find y. how do you set this up?
May 5, 2014

English/Mythology
that is what I wanted to know the "meaning"
May 4, 2014

English/Mythology
What is a ritualistic interpretation of the story of Theseus
May 4, 2014

English/Mythology
What is ironic about the death of Jason and Theseus from Greek mythology
May 4, 2014

Math
The temperature of an object in a experiment is T(t) = 60(1/3)^t + 10, where T is the temperature in degrees C and t is time in seconds. What is the domain and range of this situation?
May 4, 2014

english
why am i black? please explain that to me.
May 3, 2014

health sciences
Explain the changes that occur in the DNA of muscle fibers during exercise?
April 25, 2014

science
how strenuous should the exercise be in order to metabolize sugar and fat in the body?
April 24, 2014

Thank You
Thank you sooo much Writeacher
April 24, 2014

Language Check
are the rest of them correct? besides 8 and 10
April 24, 2014

Language Check
1.has 2.are 3.show 4.were 5.play 6.is 7.use 8.requires 9.enjoy 10.turn Hope im right
April 24, 2014

Language Check
Choosing verbs that agree in Number with Their Subjects: 1. Almost everybody (has,have) played games that originated in faraway places. MY ANSWER: HAVE 2. Few of these games (is,are) difficult to play. MY ANSWER: ARE 3. Pictures on ancient Greek pottery (show,shows) people ...
April 24, 2014

Question
how would you get 3. if the answer was 2/3
April 24, 2014

Language HELP
Proofreading a Parapgraph for Subject-Verb Agreement, Help with the errors: 1.Oridnary houses or a public building sometimes present problems for people with disabilities. 2. For example, a person using a wheelchair or crutches often have difficulty maneuvering in narrow halls...
April 24, 2014

criminal justice
the study of moral standards and how they affect conduct
April 19, 2014

criminal justice
I am still confused on what they have in common.
April 19, 2014

criminal justice
how are Ethical Egoism and Virtue Ethics the same and what are the contradictory elements between the two systems
April 19, 2014

calculus help
Does the function satisfy the hypotheses of the Mean Value Theorem on the given interval? f(x)= ln(x) , [1,6] If it satisfies the hypotheses, find all numbers c that satisfy the conclusion of the Mean Value Theorem. (Enter your answers as a comma-separated list. If it does not...
April 16, 2014

college Algebra
A rectangular fence is to be built along a river using the river as one side of the fence.the cost of the fencing for the two ends is $8 per sq ft and the cost of the fencing for the side running parallel to the river is $12 per sq ft. If you have $3600 to spend on purchasing ...
April 15, 2014

math
Water flows through a pipe with the inner diameter of 20cm at a speed of 1m/s. How long does it take for the water flowing out from the pipe to fill a cylindrical tank with the base radius of 0.8m and the height of 0.5m?
April 14, 2014

Math
Alex's favorite restaurant is a buffet-style Chinese restaurant downtown. Each time he goes, he chooses 2 appetizers and 1 entree. If the restaurant has four appetizers and 5 entrees to choose from, how many, times could Alex go to the restaurant without choosing the same ...
April 6, 2014

Math
Dominic drove 324 miles from Salt Lake City,Utah, to Bryce Canyon National Park in 6 hours and 34 minutes. What was his average speed, in miles per hour?
March 26, 2014

Pages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | Next>>

Search
Members