Thursday
March 30, 2017

# Posts by Daniel

Total # Posts: 1,097

Physics
A 1230 kg car drives along a city street at 31.0 miles per hour, and a baseball has a mass of 0.142 kg. What speed must the baseball have if its momentum is to be equal in magnitude to that of the car? Give your result in miles per hour.
November 19, 2011

Physics
A honeybee with a mass of 0.175 g lands on one end of a popsicle stick. After sitting at rest for a moment, the bee runs toward the other end with a velocity 1.41 cm/s relative to the still water. What is the speed of the 5.20-g stick relative to the water? (Assume the bee'...
November 19, 2011

Physics
A young hockey player stands at rest on the ice holding a 1.3-kg helmet. The player tosses the helmet with a speed of 4.6 m/s in a direction 13° above the horizontal, and recoils with a speed of 0.27 m/s. Find the mass of the hockey player.
November 19, 2011

Physics
A 821-kg car stopped at an intersection is rear-ended by a 1810-kg truck moving with a speed of 11.5 m/s. If the car was in neutral and its brakes were off, so that the collision is approximately elastic, find the final speed of both vehicles after the collision.
November 19, 2011

Physics
A 821-kg car stopped at an intersection is rear-ended by a 1810-kg truck moving with a speed of 11.5 m/s. If the car was in neutral and its brakes were off, so that the collision is approximately elastic, find the final speed of both vehicles after the collision.
November 19, 2011

Comprehension
The sweater-------- looks best on you is the red one. Which pronoun do I use
November 9, 2011

Algebra
Luisa mows lawns during the summer. She charges \$15 if she cuts the grass but charges \$5 more if she also trims the grass. Last week she trimmed 5 more yards than she cut. If she made \$415 last week, how many yards did she trim?
November 9, 2011

government
PROJECT: FEUDALISM Using the Internet, encyclopedia, and/other reference material for research, write a 1,000-word report on feudalism in the history in one of the following countries: France England Germany Include the approximate years when feudalism began and ended in that...
November 5, 2011

calculus
For what x-values does y=e^-x have the same slop as x+4y = 1 I am not sure what steps I am supposed to take to tackle this problem.
November 1, 2011

algebra
Dont Know they make high school harder than it should
November 1, 2011

Logic
The second paragraph.
October 30, 2011

Algebra
Find the numbers that each letter stands for. EFGHx4=HGFE E= F= G= H=
October 30, 2011

calculus
If y = f(x) = x^(p/q) then y^p = x^p show through implicit differentiation that d/dx[x^(p/q)] = (p/q)x^[p/q] Not sure how to tackle this problem.
October 24, 2011

Physics
A block of mass 2.00kg starts at rest at the top of a ramp that is inclined delta= 40.0 degrees with the horizontal. The block slides down the ramp a distance of 3.60 meters where it contacts a relaxed spring with K=300N/m. If the coefficient of kinetic friction between the ...
October 19, 2011

Math
red flag 25
October 18, 2011

PHYSICS
A car traveling at a constant velocity of 30.0 m/sec passes an intersection at time t=0. 45 seconds later a second car passes the same intersection and its traveling in the same direction at a constant velocity of 55 m/sec. when does the second car overtake the first car? how ...
October 16, 2011

statistics
Starting with a population that is normally distributed with a mean of 100 and a standard deviation of 12, answer the following questions (if possible). a. What is the probability of randomly drawing a single score between 100 and 106, p(100 < X < 106)? b. What is the ...
October 15, 2011

physics
a projectile is fired from the top of a building with an initial velocity straight upward at 40m/sec. the top of the building is 50 meters above the ground? a) the maximun height of the projectile above the building b) the time for the projectile to reach the top c) the ...
October 15, 2011

calculus
Find an equation of the tangent line to the curve at y = cosx - sinx (pi, -1) I found y'= -sinx - cosx and used the equation of the tangent y = mx +b I input the values and get -1 - [(-sinx - cosx) * pi] = b the answer says it is y = x - 1 - pi I have no idea how the ...
October 14, 2011

Physics
A Federation starship (2500000 kg) uses its tractor beam to pull a shuttlecraft (10000) aboard from a distance of 7 km away. The tractor beam exerts a constant force of 25000 N on the shuttlecraft. Both spacecraft are initially at rest. How far does the starship move (in m) as...
October 11, 2011

calculus
I am trying to find equation of the tangent line to the curve 2/(1-3x) at x=0 using the definition. I applied it into the formula lim h->0 [f(a+h) - f(a)]/h which gave me [2/(1-3x+h) - 2/(1-3x)]/h I took the conjugate and came with [4/(1-3x+h)^2 - 4/(1-3x)^2] / h(2/(1-3x+h...
October 1, 2011

calculus
Thanks a lot!
October 1, 2011

calculus
sqrt(x^2 - 9) / x I need to solve this using the definition of a derivative [f(a+h) - f(a)]/h I can't seem to get it :\
October 1, 2011

Trig
8.2,171.8 degrees
September 30, 2011

diffirential calculus
two points are moving horizontally in space at different heights above the earth. show that the angle of elevation of the line joining them is greater when the distance between them is least.
September 25, 2011

math
use your calculator.show 14. broken keyr is 1. show 2 ways
September 21, 2011

physics
If a 2000 pound train tilts of a 20 foot cliff at a 135 angle how long will it take to reach the ground?
September 21, 2011

Math
calculate lim┬(√(x^2+y^2)→∞)⁡〖(sin⁡(x^2 y^2))/(2x^2+3y^2 )〗
September 19, 2011

physics
Good study tips for physics? I am having trouble understanding the theory and how to apply it into the equations. People have told me I should not just punch in numbers, but I do not know what to do besides that; I treat it like math.
September 18, 2011

calculus
Why is it that when Lim x -> 0^- the |x| = -x?
September 18, 2011

Math
(actually sorry, it's 17+44, I made a mistake. That is equal to 61)
September 13, 2011

Math
Easy. Ok "Half the boys said....yes" which means half said no. 17 said no so that means 17 out of 34 boys know to swim. Now for the girls, we know there are 34 boys so that leaves 66 girls total. 66 multiplied by 2/3 is 44. (44 girls said yes.) 44+34= 78. Therefore ...
September 13, 2011

Evan is 1.8 metres tall. He walks between two lampposts that are 5 metres apart and notices his shadow from one of the lampposts just touches the base of the other. He also notices that the ratio of his height to the height of the lamppost is 2 to 5. How far is he from each ...
September 13, 2011

ENG125
Well, poetry can have different topics. Most people think poems HAVE to rhyme. Sometimes, they don't. Here is an example of a rhyming poem:Roses are red,Violets are blue,I know how to rhyme,And so do.
September 1, 2011

Chemistry
The Percent is 5.9X10^-12 [V(nucleus)/V(atom)]x100% = answer
August 31, 2011

health care management
Networks and alliances are marriages of money and convenience. Systems are marriages of commitment and values. Develop arguments and counterargements for each statement.
August 27, 2011

Finance
Supposed you owned a portfolio consisting of \$25,000 of US government bonds with a maturity of 30 years. Would your portfolio be riskless?
August 21, 2011

Algebra
2. The Sugar Sweet Company is going to transport its sugar to market. It will cost \$4200 to rent trucks, and it will cost an additional \$150 for each ton of sugar transported. Let C represent the total cost (in dollars), and Let S represent the amount of sugar (in tons) ...
August 18, 2011

shortest route
from immediate predec duration a 2 b 5 c a 3 d b 6 e a,b 4.00
August 4, 2011

Biology
The article is presented by HomeworkEasy experts out of five years of stead fast dedication to help students with their biology assignments, homework and projects. Origins of biology as a field are expounded and the academic possibilities are briefed. The spicy narration oh ...
July 11, 2011

Math
How many positive 3-digit integers contain only odd digits?
July 10, 2011

physics
given that the radius of the earth is 6.37×10^3km and the period of revolution of the moon round the earth is 27.3 days, calculate the average distance from the earth to the moon.
July 5, 2011

pre algebra
thank you
July 5, 2011

pre algebra
23/50 of 50 2/3 show steps please
July 5, 2011

chemistry
How would I calculate the molarity of the resulting solution if 25.0mL of 1.50 M HCL solution is diluted to 500 mL. I know you have to change the milliliters to liters by dividing by 1000 and I know that M= Moles of Solute/Liters of Solute but after that I'm lost. Please ...
July 1, 2011

Math
How many liters of water should be added to 20 liters of 40% solution of acid to obtain 30% solution?
June 27, 2011

Finance
The essentiality of finance in the practical world and its applicable evolution is discussed in detail. Accompanying fields such as accounting, economics, audit etc; are discussed in brief. The article throws light on the allied practices of financial management and possible ...
June 24, 2011

english
1.Type the appositive(s) in each sentence. You do not need to include the commas. Sam, our cat, is too lazy to catch mice. 2. Type the appositive(s) in each sentence. You do not need to include the commas. Our cat Sam is too lazy to catch mice 3. Type the appositive(s) in each...
June 22, 2011

english
Locate the adverb phrase and the adjective, verb, verb phrase, or other adverb modified. We stopped near a mountain stream.
June 22, 2011

math
Two circles with radii 3cm and r cm touch each other externally. If their common tangent is 8cm long,what is the value of r?
June 15, 2011

Chemistry
the equation of the line for a graph of voltage versus log[Cu2+] was y= - 0.0179x - 0.0015. The voltage of a solution with an unknown [Cu2+] was measured against the same reference cell, under the same conditions; the voltage was found to be 0.012 V. Determine the [ Cu2+] of ...
June 14, 2011

Marketing
How do we incorporate social and cultural forces in marketing systems?
June 10, 2011

english
Identify the complete adjective clause and the word it modifies. Many Californians who own homes live on hillsides.
June 9, 2011

english
Identify the complete adjective clause and the word it modifies. This course deals with facts that everyone should know.
June 9, 2011

english
Identify the complete adjective clause and the omitted introductory word. Is he the man you saw at the coffee shop?
June 9, 2011

english
Identify the complete adjective clause and the omitted introductory word. The car I drive has 50,000 miles on the odometer.
June 9, 2011

English
Identify the complete adjective clause and the word it modifies. I elected to take astronomy, which is not a required course.
June 9, 2011

Physic
what is the focal length of a plane mirrior which is 4m tall?
June 9, 2011

Social Studies
What is agricultural transition?
June 5, 2011

runways
IF THE LENGTH OF THE RUNWAY IS 6 INCHES, WHAT IS THE PERIMETER?
June 3, 2011

math
if m+2/5=1/2If , then which of the following is true? 2m + 4 = 5 m + 2 = 2 2m + 2 = 5 m + 4 = 6
May 31, 2011

English
As the headboy of your school write a speech on the send forth party of the principal of your school.
May 23, 2011

Trig
cos4x*cos3x + sin4x*sin3x
May 22, 2011

math
solve 3x - 5 + x = 31.
May 20, 2011

math
Emily and Miranda are standing outside. Emily is 5 feet tall and casts a shadow of 28 inches. Miranda's shadow is 29.4 inches long. Approximately how tall is Miranda?
May 19, 2011

math
A tree casts a shadow of 28 feet. At the same time, a biologist who is 7 feet tall casts a shadow of 2 feet. How tall is the tree?
May 19, 2011

math
A double recipe of cookies calls for 5 cups of flour. Which of the following proportions could be used to find the amount of flour for a triple recipe? 5/2= f/3 2/5=f/3 2/3 = f/5 3/2=5/f
May 19, 2011

math
Which of the following is the equation of a direct variation that has a constant of variation equal to -? y = x - -y = x y = -2x y = -x
May 19, 2011

math
Which of the following sets of ordered pairs is not a direct variation? (0, 0); (-2, 4); (3, -6) (1, 1); (-2, -2); (3, 3) (10, 2); (15, 3); (20, 4) (0, 0); (1,
May 19, 2011

physics
If the initial velocity of the car in the previous problem (the car accelerates at 5.00 km/hr/s for 3.50 sec) is 22.6 km/hr, what is the final velocity of the car?
May 18, 2011

Physics
A car experiences an average acceleration of 5.00 km/hr/s for 3.50 sec. What is the change in velocity of the car?
May 18, 2011

Physics
An ostrich runs north in a straight line for 21 meters. She then turns around and runs 25 meters back toward her nest (south) on the same path. What is her displacement?
May 18, 2011

physics
A man weighs 645 N on Earth. What is his mass?
May 18, 2011

Math
Please simplify this expression: 8b + 9 + 4b - 3b + (-2b) - (-5)
May 11, 2011

finance
Initial spot exchange rate (¥/\$) 110.60 Initial price of a Nissan Xterra (¥) 2,800,000 Expected US dollar inflation rate for the coming year 2.000% Expected Japanese yen inflation rate for the coming year 0.000% Desired rate of pass through by Nissan 70.000% a. What ...
May 5, 2011

grammar
Thank you for your previous answer. There were so many questions that I missed it. I hope that you will help me in the future.
May 4, 2011

grammar
How do you write 1234.567 in English word form?
May 4, 2011

Economics 210
Information given is sample mean of 12 for a sample of 26. Sample deviation is 3. Using a .02 level of significance. H0 u< or equal to 10 and H1 u> 10 a. Is this a one or two tailed test? b. what is the decision rule? c. what is the value of the test statistic? d.what is...
May 3, 2011

grammar
I have to write 1234.567 in English word form. How do I write this number?
May 3, 2011

taylor ranch
38-47-15-36-91-25-14-17-65
April 30, 2011

Physics
Oh wait never mind. Seems like there's some rounding issues going on with the online system. Thanks for the help drwls.
April 26, 2011

Physics
That didn't work. I think you're supposed to find work in each case but I'm not sure how to do that.
April 26, 2011

Physics
Some Carnot engine has an efficiency 0.700. The hot reservoir temperature is 900K. This means that the temperature of the cold reservoir is 270K. If the cold reservoir is dropped to 260K, the new efficiency is 0.701. If the output of the power is kept constant by increasing ...
April 26, 2011

Grammar
Where do we put the "and" when writing a number, 1234.567 for example, in words? Some references say, "one thousand two hundred and thirty-four point five six seven. Other references say, "one thousand two hundred thirty-four and five hundred fifty-six ...
April 23, 2011

Physics
Some cooking pan whose bottom is made out of copper has a radius 0.1 m and thickness 0.003 m. The water in the pan boils at 1.7e-3 kg/s. How much higher is temperature of the outside surface of the pan's bottom compared to the inside surface?
April 22, 2011

statistics
suppose you are testing Ho:p=.65 versus Ha: p<.65 . for a random sample of 100 people, x=58, where x denotes the number in the sample that have the characteristic of interest . use a .01 level of significance to test this hypothesis.
April 20, 2011

statistics
Use the data given to test the following hupotheses. Assume the data are normally distributed in the population. Ho: M=7.48 Ha:m>7.48 xbar = 6.91, n=24, sigma=1.21,alpha=.01
April 19, 2011

statistics
a study by Hewitt Associates showed that 79% of companies offer employees flexible scheduling. suppose a researcher believes that in accounting firms this figure is lower. The researcher randomly selected 415 accounting firms and through interviews determines that 303 of these...
April 19, 2011

IT 240
2. You are the network administrator for a company that has a peer-to-peer network. How would the pieces and components of this network relate to each other? Define all of the components of this type of network.
April 17, 2011

calculuc
A rectangular box without a lid is to be made from 12 square meters cardboard. Find the maximum volume of such a box.
April 17, 2011

math
A rectangle is 3 times as long as it is wide, it's area is 108 square centimeters. What is the length? what is the width?
April 5, 2011

Physics
Find the speed at which Superman (mass=88.0 kg) must fly into a train (mass = 17998 kg) traveling at 60.0 km/hr to stop it. Running into the train at that speed would severely damage both train and passengers. Calculate the minimum time Superman must take to stop the train, if...
March 27, 2011

algebra
multiply and simplify by factoring sqrt20a^11b*sqrt8a^12b^11
March 24, 2011

algebra
multiply and simplify by factoring sqrt20a^11b*sqrt8a^12b^11
March 24, 2011

algebra 1-B
solve (sqrt14-x)+8=(sqrt3-x)=11
March 24, 2011

physics
2Tcos16.9=W, but W=mg=54x9.8=529.2N, T=W/2c0s16.9 T on each cord is to be 276.54N
March 22, 2011

MGT330
General environment – how will the forces be changing over the next three years and how will these forces impact the industry (for example, demographics – aging population)?
March 14, 2011

chemistry
26.5 moles of a .2 M aqueous solution of NaOH is required to titrate 50 ml of an aqueous solution of HNO3, what is the concentration of HNO3. I don't want the answer, I want to know how to do it.
March 14, 2011

chemistry
26.5 moles of a .2 M aqueous solution of NaOH is required to titrate 50 ml of an aqueous solution of HNO3, what is the concentration of HNO3. I don't want the answer, I want to know how to do it.
March 14, 2011

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