Thursday
July 24, 2014

Posts by mark


Total # Posts: 1,257

physics
Thanks

physics
Two pool balls of equall mass have a perfectly elastic headon collision.The fist ball is traveling at 2m/s and the second at 3m/s in the opposite direction.what are thier speeds immediately after impact? I'm lost on what equation to use here. Does the faster velocity trans...

calculus
if f'(x)=2f(x) and f(2)=1, then f(x)= ?

calculus
if dy/dx=ycos x and y=3 when x=0, then y= ?

physics
I think the force of gravity is the only force at work so what is the force of gravity in newtons?

physics
Thanks

physics
A boy sitting in a boat at rest throws a 6.4kg object horizontally out of the boat at 10.0 m/s. The mass of the boy is 26kg and the mass of the boat is 45kg. Calculate the velocity of the boat just after the package is thrown. I used momentum before = momentum after. 6.4kg*10....

English - Native speakers
Thank you! I got it. It's a bit easier now

English - Native speakers
Need some explanations about the articles! Why do we say I love Italian food and not the Italian food Why do we say I leave home at 3 and not I leave the home why do we say I go to bed at 11 and not I go to the bed at 11

English
Oh and is there some other word for an argument? f.e. What are your arguments?

English
Hello! Can you write the word Goodbye like this and like this Good bye? What about Goodnight or Good night?

physics
If an elevator with mass of 4850kg is designed to have a maximum acceleration of .068g (g is gravity acceleration). What are the maximum and minimum forces the motor should exert?

English - Native speakers
and if these words are new words for people than I should write them without articles? When I write verbs I write them like f.e. to increase to explain etc. so that is why I am asking about the nouns

English - Native speakers
Hello! When you are writing the unknown words f.e. on the board can you write the following or is something else correct (I am referring to articles): an aim- a counter-revolution- a supporter- a square- a mayor- a green area- a pedestrian zone- So should you write the unknown...

math
For how many two digit prime numbers is the sum of its digits 8

math
For how many two digit prime numbers is the sum of its digits 8

math
For how many two digit prime numbers is the sum of its digits 8

physics
Thanks , alot!

physics
A 88g arrow is shot from a bow whose string exerts an average force of 110n on the arrow over a distance of 78cm.What is the speed of the arrow as it leaves the string?

physics
Suppose you notice 6.3 ocean waves pass by a buoy in 26.3 seconds. What is the frequency of the ocean waves?

English - Native speakers
And one more thing how come is it possible to say My family are from Rome?

English - Native speakers
Hello! Why don't we say possessive pronouns in English for the following words: my, your, his, her, its, our, your, their. Why do we say possessive adjectives? It doesn't make sense to me since my mother tongue is not English. Can you maybe explain this to me? Thank you

Trig
If the terminal side of theta in standard position contains the point (5,8). Find the exact value of tan of theta

Trig
Given that theta is a quadrant 3 angle with cos of theta=-7radical65/65, determine tan of theta

English - Native speakers
Ok one more thing about quantifiers :D Can you help me and tell me which of the following sentences are correct in both ways: 1.I have no/I don't have any time - is both possible? 2.He works a lot/much 3.There are too much or to many people? I think 1 and 2 can go both way...

English - Native speakers
Thank you Writeacher for your answers today :) Here are some other questions :) : Do you say We've had a lot of rain recently or lots of rain? Can someone explain the difference between those two phrases - in your own words. Also what exactly is the difference between a li...

English - Native speakers
Ok but what about the phrase to hold the grudge against someone? For example don't hold the grudge against me but I think you are wrong Or Don't hold it against me but I think you are wrong Is this correct?

English - Native speakers
Hello! Which expression do you use the most in English? Don't take amiss to me or something similar? I am looking for a verb but I can't seem to find it in English. Is there also an expression like to take harm on someone? I hope you get the idea which verb or expressi...

PHYSICS
The hydraulic gradient in an 10-ft-thick aquifer at a site of uniform flow prior to pumping is -0.02. The hydraulic conductivity is 100 ft/day. True or False: After pumping starts at a well at a rate of 10,000 cubic feet per day, the distance from the well to a point of stagna...

physics
An object is dropped from a platform 400 ft high. Ignoring wind resistance, how long will it take to reach the ground?

BUSINESS LAW
In the video game Corporate Cowboy, your task is to investigate complaints of wrongdoing on the part of corporate directors and officers, decide whether there is a violation of the law, and deal with the wrongdoers accordingly. Jane, a shareholder of Goodly Corporation, allege...

English - Native speakers
Hello once again! Can you tell me the difference between Don't underestimate me! and Don't underrate me! Which one is more used in English and what's the difference between those two words? Is there any other similar word? My second question. Can we say both I'...

English
Hello! I am trying to formulate the following sentence correctly: 1. "I plan to continue my education on the graduate study program of the same university." Any better ideas?

physics
If a 9800kg train car traveling at 15m/s impacts another train car at rest and after the impact the 2 are going 6m/s. What is the mass of the second train car?

Math
I think in simple terms you are removing the parenthesis, so you need to multiply 4 by each one inside the parenthesis, 4x9=36, and 4x-m=-4m so I believe tat "D" sis the answer.

calculus
Find the volume of the solid whose base is the region bounded between the curve y=sec x and the x-axis from x=pi/4 to x=pi/3 and whose cross sections taken perpendicular to the x-axis are squares.

physics
Thanks

physics
If a masss of 65kg is dropped 4.3m onto a spring with a stiffness coefficient of 6.2x10^4 n/m, how far is the spring depressed?

physics
A 65 kg object is dropped from rest a distance of 4.3m onto a spring with a stiffness coefficient of 6.2x10^4n/m. How far is the spring compressed?

math
If the base to a gutter and 12 feet from the base of a house, how many feet high on the house does the ladder reachIf th

physics
Two objects .25m apart exert a force of 2.5x10 to the -11 power on each other, if thier total mass is 4kg, what is the mass of each?

physics
Two objects .25m apart exert a force of 2.5x10 to the -11 power on each other, if thier total mass is 4kg, what is the mass of each?

physics
2 objects are .25m apart and exert a force of 2.5x10^-10 N on each other. Thier total mass is 4 kg. what is the mass of each?

Physics
I used my last attempt at the problem using this info, but was unable to figure out the answer. Thank you for responding though.

Physics
Can't figure this one out. "In a pickup game of dorm shuffleboard, students crazed by final exams use a broom to propel a calculus book along the dorm hallway. If the 3.5 kg book is pushed from rest through a distance of 0.88 m by the horizontal 25 N force from the br...

reading
If a person lives over 160 years What will happen?

reading
What will be the impact on society if people live more than life expectancy?

reading
can you please answer my other questions?

reading
What is the advantage or disadvantage that people used telomere?

reading
thank you

reading
What will be the impact on society If people live more then life expectaney?

math
which is matches the problem? <,>,= 8.5_____-10^3

physics
Assume acceleration due to gravity=10 m/s. A ball is thrown vertically upward from top of a building with speed of 20 m/s. On the way back ball misses the building and lands on the ground. Total time the ball is in air is 6 seconds. Determine the height of the building with s...

Math
Theresa's company just bought 18 new computers. She was told that there would be a random drawing to see which employees got one of the new computers. If Theresa has 46 coworkers, what is the probability that she will get one of the new computers?

toxicology
a) Generally speaking, the ability of a substance to move across a membrane by passive diffusion is enhanced by decreasing size and by an increasing octanol/water coefficient. T or F

geometry
Assume there are 2 similar polygons, whose scale factor is 4:5. If the larger polygon has an area of 30 units squared, what is the area o the smaller polygon?

COM/155
I will try later.....thank you

COM/155
none of my bold or underlined words showed up....

COM/155
For this assignment, I have reviewed the amazingly racy MTV reality series called Jersey Shore. The show follows the lives of eight savagely stylish young Italian-Americans at the Jersey Shore. During the day, the cast shares shifts working at a competitively busy boardwalk t-...

COM/155
My assignment is to write a television show review. I am to Bold adverbs, and underline adjectives. I think I found them all, what do you think?

spelling
what word ends in -let and has the same meaning as starlet?

english
when do you use present perfect?

groundwater science
Assume that a gaining stream exists in physical connection with groundwater in an unconfined aquifer. Assume that several contour lines of equal head cross the stream and intercept it. True or False: Since the stream is gaining, the contour lines of equal head will increase in...

COM/155
Thank you for your help. Have a good night.

COM/155
me, her, my, who, they. Am I correct?

COM/155
•Write several sentences describing a recent interaction with a friend or family member about personal finance or credit cards. •Use at least 5 different pronouns. I think these sentences are correct. They should include the necessary five diferent pronouns. What do ...

chemistry
Just figured this out for my Chemistry class. .86 / (23 + 34.45) = X / (39 + 34.45) Solve for X ( .86 / (23 + 34.45) ) * (39 + 34.45) 1.099 = X X =

Physics
A crate of a mass 150 kg is lifted onto a truck 2.5 m above the ground. How much potential energy has the crate gained?

com/155
Thanks again!

com/155
My assignment is to write a paragraph about what I've learned this week. It should contain clear and concise sentences, with correct spelling and puncuation. How do you think I did? This Weeks Material Has Changed The Way I Write This weeks material has opened my eyes to s...

COM/155
Thank you so much! Have a great night.

COM/155
also.....the puncuation also has to be correct.

COM/155
For this project, I had to write 5 clear, concise, well written sentences about what I've learned this week. Do these sentences look correct to you? One of the most important lessons I have learned is to stay away from using vague or inappropriate words in my writing. I ha...

Physics
In an arcade game, a ball is launched from the corner of a smooth inclined plane. The inclined plane makes a 33.3° angle with the horizontal and has a width of w = 42.9 cm. The spring-loaded launcher makes an angle of 45.0° with the lower edge of the inclined plane. Th...

COM155
Thank you for your help! Have a great day.

COM155
Ok.....How is this? Identify those with errors by marking each of the errors in bold. Make the correction in parentheses after the error. For those that are correct, write correct at the end of the sentence. Their (There) are three kids in the room. We have been married for 20...

COM155
I think I found all of the errors, what do you think? Identify those with errors by marking each of the errors in bold. Make the correction in parentheses after the error. For those that are correct, write correct at the end of the sentence. Their (There) are three kids in the...

math
A manufacturer can produce 8,500 units for a total profit of 47,600.00 dollars, but if he increases his production to 11,500 units, then his profit becomes $65,600.00. fixed cost is? net profit per unit produced is?

Math
I got that far. But I still do not know how to find the fixed cost and net profit from the p(x) equation.

Math
A manufacturer can produce 8,500 units for a total profit of 47,600.00 dollars, but if he increases his production to 11,500 units, then his profit becomes $65,600.00. It follows that his fixed cost is? and his net profit per unit produced is?

Math
Thank you so much!

Math
So it would be 2 as well correct? Sorry, this is all new for me.

Math
If the slope of line f is 2,and a line d is parallel to the line f, what is the slope of line d?

Math
A model car is made to a scale of 2 to 25. If the model is 17 inches long, how long is the actual car?

physics
im trying to figure out this same problem!!!

finanace
Using 7.86 rate of return , what should be the current share price of AirJet Best Parts, Inc. if the company maintains a constant 1% growth rate in dividends and the most recent dividend per share paid on the stock was $1.50?

Chemistry
In a chemical reaction, exactly 2 mol of substance A react to produce exactly 3 mol of substance B 2A ---> 3B How many molecules of substance B are produced when 27.9 g of substance A reacts? the molar mass of substance A is 24.7 g/mol STEP 1: convert the mass of A to moles...

Math
I am a little confused, can someone please help me? I the radius of a circle is 5m, what is the area of the circle? Is this the same as the surface area and it would be 10m?

Social Studies
Which of the following is not a means by which cultures became diffused?

Social Studies
Compare and contrast how Islam spread with how christianity spread.

math
The support wire for a sign meets the wall and the overhang as shown below. If m<2=42 degrees, find m<1. Explain your reasoning.

psychology
hi im stuck on a question on my assignment, question , sometimes when going to meet jamie , karen mistakes someone else for him , her motivation and expectations of seeing him effect her perceptions, could you direct me to one study illustrating either of these factors, and it...

Math
A cube is both a polyhedron and a prism. This isn't true right?

Chemistry
A 5.00-gram sample of glucose, C6H12O6, [molar mass = 180.] is dissolved 10.0 grams of water What is the molality of the glucose solution? Calculate the boiling(BP) and freezing points(FP) of this solution to the nearest 0.1 C°. The vapor pressure of pure water at 30º...

math
Sparky weighs 3/4 of her weight, plus 3/4 of a pound. How much does she weigh?

9th grade alegbra
two volumes one is 8 the other 125, the surface are is 4, what is the other surface area

Math
make up alist of data with the following landmarks 15, 5,10,20

Chemistry
When 2.50g of an unknown solute is dissolved in 40.0g of ethanol the solution boils at 79.4C. The normal boiling point of this substance is 78.4C and it has a kb of 1.22C/m. (a) What is the molality of this solution? (b) What is the molecular weight of the solute?

Language
Which would be correct? They or Them and I are buying some groceries. Would it be They?

statistics
what is the sample space for this experiment: select two cards from a deck of 52 cards and observe the color of each card drawn.

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