Saturday
November 22, 2014

Posts by Sam


Total # Posts: 4,067

Physics
A 10 kg block rests on a frictionless table and is whirled in a circle and kept in a radius of 1.6 m by a rope attached to a peg. What is the tension in the rope if the block has a linear speed of 18 m/s? __N
March 4, 2012

Physics
A Ferris wheel has a radius of 14 m. What period of rotation would give the occupants a feeling of "weightlessness" at the top? __s
March 4, 2012

math
8 9/10 minus 3 4/10 =
March 3, 2012

math
a school has purchased a large field that has a square area of 19,500 ft squared. what is the approximate length of each side of the square area?
March 3, 2012

math
5x-(2a^6•16b)= -3b(6a^2 -(5bx))
March 1, 2012

Geometry
In triangleRST, mangR = (2x + 10)­­°, mangS = (2x + 25)°, and mangT = (x – 5)°. Find the value of x.
March 1, 2012

physics
Ayesha exerts a force of 186 N on a lever to raise a 2.70 × 103-N object to a height of 29.0 cm. If the efficiency of the lever is 83.3 percent, how far does Ayesha move her end of the lever?
February 29, 2012

Chem II
thank you
February 29, 2012

Chem II
PCl5 dissociates according to the reaction: PCl5(g) ↔ PCl3(g) + Cl2(g). One mole of PCl5 was placed in one liter of solution. When equilibrium was established, 0.5 mole of PCl5 remained in the mixture. What is the equilibrium constant for this reaction?
February 29, 2012

PHYSICS!! SOS
Determine the scalar product of A= 3.0i + 1.0j - 2.0k and B= 3.0i - 2.0j - 3.0k .
February 29, 2012

Science
A person performs a work task at a mechanical efficiency of 20 percent and at total energy output of 15kcal/min. How much energy(kcal/min) is lost as heat? and how much energy(kcal/min) is used to actually perform the work?
February 29, 2012

Kinesology
A person performs a work task at a mechanical efficiency of 20 percent and at total energy output of 15kcal/min. How much energy(kcal/min) is lost as heat? and how much energy(kcal/min) is used to actually perform the work?
February 29, 2012

Physics
In her physics lab, Stephanie rolls a 30 g marble down a ramp and off a table with a horizontal velocity of 2 m/s. The marble falls in a cup placed 0.4 m from the table’s edge. a. How long is the ball in the air? 0.2 s b. How high is the table? m
February 27, 2012

Math
A fisherman has estimated that it takes 6 minutes to paint each square foot of the hull of his boat? How much time should the fisherman allow for the painting of the hull, if the hull were composed of two sides, each 31.5 feet by 8.00 feet? Is the correct answer 50.4 hours?
February 25, 2012

probability problem
A box contains 6 green, 8 red, 5 yellow, and 10 blue marbles. Four marbles are drawn from the box at the same time. a) What is the probability that all four marbles are the same color? b) What is the probability that none of the marbles is blue? c) What is the probability that...
February 24, 2012

Orgo
Thank you I was able to work it out: it's a 1:1 ratio so since 5.5g chlorophenol is .043 mols, nitric acid must be .043 mols as well. V(1.20M) = .043mol V= .036L
February 24, 2012

Orgo
What volume of 1.20 M nitric acid is needed to convert 5.5g of m-chlorophenol to 3-chloro-2,6-dinitrophenol? I So far I have converted the 5.5g chlorophenol to mols and I got .043 mol. I know Volume * Molarity (1.2M)=moles. At this point I am stuck.
February 24, 2012

US Government
What should be the goals of the US government today? I have to write an essay with this very question but I need help to formulate at least 4 different topics that the US Government should focus on.
February 24, 2012

math
jeremy has 19 coins of 2 different values. the total value of coins is 1$ what are the coins and how many of each coins does he have
February 23, 2012

Anatomy
I need a site that has a labled picture of what parts are found in the knee joint when disecting a fetal pig
February 23, 2012

physics
A water-skier lets go of the tow rope upon leaving the end of a jump ramp at a speed of v1 = 14.7 m/s. the skier has a speed of v2 = 12.7 m/s at the highest point of the jump. Ignoring air resistance, determine the skier's height H above the top of the ramp at the highest ...
February 20, 2012

Precalculus
find roots of w^(4)+2^(3)+3^(2)+4w-52=0
February 20, 2012

Animal Science
what time of the year do feral cats usually mate?
February 20, 2012

spanish
Completa las oraciones con la forma correcta de cada verbo. 1. En bicicleta podemos explorar el parque sin _____(caminar) demasiado. 2. Mis hijos van a dejar todo limpio antes de ____(salir) del parque. **I have tried every possible form of verb conjugation and I can't ...
February 18, 2012

math
I have to make a line segment that is 5000mm long I have no idea how long Can u help me?
February 16, 2012

english
"#1 Crush" - Garbage Local God - Everclear "Angel" - Gavin Friday "Pretty Piece of Flesh" - One-Inch Punch Kissing You (Love Theme from Romeo + Juliet) - Des'ree – "Whatever (I Had a Dream)" - Butthole Surfers Lovefool - The ...
February 12, 2012

english
i need to chose at least 8 songs and how they relate to romeo and juliet acts so i can make a soundtrack. thanks
February 12, 2012

english
how do i create a eight song soundtrack
February 12, 2012

english
"#1 Crush" - Garbage Local God - Everclear "Angel" - Gavin Friday "Pretty Piece of Flesh" - One-Inch Punch Kissing You (Love Theme from Romeo + Juliet) - Des'ree – "Whatever (I Had a Dream)" - Butthole Surfers Lovefool - The ...
February 12, 2012

economics
econ
February 10, 2012

Chemistry
Okay, so I have to find the percent of water in each solution, but it involves different reagents and I'm not sure how to figure it out. Here's one example: Add all together - 4 mL water 2 mL of 0.01 M aqueous NaOH 2 mL acetone 2 mL 0.1 M alkyl halide in acetone How do...
February 9, 2012

Budget
no it's nothing right
February 9, 2012

physics
A copper block with a mass 1.82 kg is given an initial speed of 3.5 m/s on a rough horizontal surface. Because of friction, the block finally comes to rest. Assume that 77.4 % of the initial kinetic energy is absorbed by the block in form of heat, what is the change in ...
February 9, 2012

algebra
Kristen wants to make 7.5 ounces of a 25% jasmine essential oil. She only has a 15% jasmine mixture and a 30% jasmine mixture available. How much of each mixture should she combine to create the desired oil?
February 9, 2012

math
16,16
February 9, 2012

algebra
As part of her training routine for basketball, Shaylle alternates between cycling and running for exercise. She cycles at a rate of 14 mph and runs at a rate of 8 mph. If she spends 6.5 hours exercising and covers a total of 85 miles, how much time did she spend on each ...
February 8, 2012

math
Order the numbers from least to greatest.. 2/3 6.17 √28 -31/8 -4.9
February 4, 2012

physics
A person throws a 2.50 lb stone into the air with an initial upward speed of 15.0 ft/s. Part A- Make a free-body diagram of the forces for this stone after it is free of the person's hand and is traveling upward Part B - Make a free-body diagram of the forces for this ...
February 2, 2012

chem grade 12
Consider the following substance: Al2(SO4)3 What is the oxidation number of: a) aluminum b) sulfur c)oxygen
January 31, 2012

Chemistry
Which compound below would be expected to have the highest boiling point? a) CH3-CH2-CH2-CH2-CH2-CH2-CH3 b) CH3-CH2-CH2-CH2-CH-CH3 | CH3 c) CH3-CH-CH2-CH-CH3 | | CH3 CH3 d) CH3 | CH3-CH-C-CH3 | | CH3 CH3 I think its A?
January 31, 2012

Chemistry
Which compound below would be expected to have the highest boiling point? a) CH3-CH2-CH2-CH2-CH2-CH2-CH3 b) CH3-CH2-CH2-CH2-CH-CH3 | CH3 c) CH3-CH-CH2-CH-CH3 | | CH3 CH3 d) CH3 | CH3-CH-C-CH3 | | CH3 CH3 I think its A?
January 31, 2012

Chemistry
Which compound below would be expected to have the highest boiling point? a) CH3-CH2-CH2-CH2-CH2-CH2-CH3 b) CH3-CH2-CH2-CH2-CH-CH3 | CH3 c) CH3-CH-CH2-CH-CH3 | | CH3 CH3 d) CH3 | CH3-CH-C-CH3 | | CH3 CH3 I think its A?
January 31, 2012

physics
917
January 31, 2012

physics
What is the force of gravity between two 832 kg cars separated by a distance of 29.35 m on an interstate highway?
January 30, 2012

calculus
A plane flying along a straight path loses altitude at the rate of 1000 ft for each 5200 ft covered horizontally. What is the angle of descent of the plane? (Round your answer to one decimal place.)
January 29, 2012

AP Chem
A weak acid (HA) is found to ionize 16.2% when mixed at a concentration of 0.21 mol/L. What is the value of Ka for this acid?
January 28, 2012

physic
w= (correct unit)
January 27, 2012

physic
Calculate the mass (in SI units) of a 150 lb human being. m= (correct unit) Calculate the weight (in English units of a 2000 kg rhinoceros.
January 27, 2012

physics
A 0.579 kg basketball is dropped out of a window that is 6.22 m above the ground. The ball is caught by a person whose hands are 1.31 m above the ground. How much work is done on the ball by its weight?
January 25, 2012

physics
By what factor is the kinetic energy increased when the speed of a car is increased from 21 km/h to 98 km/h?
January 25, 2012

Math
Is the sum of the measure of all the angles that come together in the center of a circle the same for every circle
January 25, 2012

math
you deposit $2200 in an account that pays 3% annual interest. after 15 years, you withdraw the money. what is the balance if the interest is compounded continuously?
January 25, 2012

Mixed numbers and improper fractions
What's the improper fraction of 4 24/5
January 25, 2012

anatomy
name the structures that can be seen in elastic cartilage?
January 24, 2012

a & p
what are the structures that can be seen in elastic cartilage?
January 24, 2012

History
What geographical features have affected Russia's climate, and how have they affected it?
January 20, 2012

math
Which of the following sets of Dewey Decimal call numbers is in the correct order? A. 100.01 PRO, 100.1 BLU, 010.1 ABR, 004.15 KWA B. 010.1 ABR, 004.15 KWA, 100.01 PRO, 100.1 BLU C. 100.1 BLU, 010.1 ABR, 004.15 KWA, 100.01 PRO D. 004.15 KWA, 010.1 ABR, 100.01 PRO, 100.1 BLU
January 16, 2012

physics
i did the graph already and i put the anwser 7.5m/s^2 and i got it wrong
January 16, 2012

Class
Which steps address the "issue" and which address the "problem"?
January 15, 2012

science
They look different because the cells need time to grow. If one divides a lot, it will probably be smaller than one that has the time to grow
January 11, 2012

Physics
22.1
January 11, 2012

books
stephen crane washington irving henry james theodore dreiser bret harte mary e.wilkins freeman mark twain jack london kate chopin sarah orne jewett herman melville what is the literary style for each author Realism regionalism or Naturalism romanticism
January 10, 2012

Poetry
Can you help me analysis the meaning of The jumblies poem
January 10, 2012

psycholoy
which of the folloing characteresitcs will not reduce negative stereotyping in a contact situation? I think the answer is b. is that correct? thank you
January 5, 2012

math
for (e) is the answer correct if i get a decimal number like 8.5?
January 5, 2012

math
How do I figure this: A lunch bill is unknown. J has $8.00; not enough for the total bill. H. pays 3/5 of the bill. How much does H. pay? What's the total bill?
January 3, 2012

math
is 7pi/6 an irrational number?
January 2, 2012

physics
A 45-kg penguin slides off the edge of an ice shelf and hits the water 1.7 s later. What is the magnitude of the gravitational impulse on the penguin during its fall?
January 1, 2012

Physics
isn't that wrong because of the units? you would have to convert 145 mi to 765,600 ft. then divide by 2 (because its 2 ft/s) and get 382,800. then subtract 2 ft/s to get the change, so 382,798. is that right or did i do something wrong?
December 28, 2011

BUSS/STATS
A a
December 27, 2011

calculus
If a function f is continuous for all x and if f has a relative minimum at (-1,4) and a relative minimum at (-3,2), which of the following statements must be true? (a) The graph of f has a point of inflection somewhere between x = -1 and x=3 (b) f'(-1) = 0 (c) The graph of...
December 27, 2011

psychology
when physical energy has resulted in aresponse in a sense organ, it is clear that
December 27, 2011

psychology
neutransmitters released by the vesicles in the terminal buttons complete communication between neurons by their action in the
December 22, 2011

ENGLISH
what is the frictional world just describe that ONLY
December 16, 2011

ENGLISH
SCORE BY PHYLLIS GOTLIEB IN TWO PARAGRAPH DESCRIBE THE FICTIONAL WORLD CREATED IN SCORE
December 16, 2011

Statistics Question
Consumer Reports rated airlines and found that 80% of flights involved in the study arrived on time (that is, within 15 minutes of scheduled arrival time). Assuming that the on-time rate is representive of the entire commercial airline industry, consider a random sample of 200...
December 14, 2011

english
In our courts of law, 12 members of a jury (decides,decide) a defendant's gulilt or innocence.
December 13, 2011

Stats
Consumer Reports rated airlines and found that 80% of flights involved in the study arrived on time (that is, within 15 minutes of scheduled arrival time). Assuming that the on-time rate is representive of the entire commercial airline industry, consider a random sample of 200...
December 13, 2011

Math Grade 10
a
December 12, 2011

Chemistry
How many oxygen atoms are represented in the formula Fe2(SO4)3?
December 6, 2011

Algebra 1
How do you do slope intercept form y=mx+b
December 6, 2011

math word problem
Suzzanne wants to build a fence around her square garden . The garden measures 7 feet on each side . How much fencing material does she need?
December 5, 2011

Chemistry
How many grams of chlorine are needed to make 5.00 X 10^6 g of a solution that is 1.50 ppm chlorine by mass?
December 5, 2011

English Essay Topic
Thank you Writeacher and Ms. Sue!! <3
December 3, 2011

English Essay Topic
I am stuck! I don't know what topic to write about for my research paper! I want to write about something modern and recent but I don't know what! I have been looking through sites but nothing seems to stick out! Can you give me any suggestions?
December 3, 2011

acc
Which of the following is a true statement about manual and electronic accounting systems?
December 3, 2011

Chemistry
A decomposition reaction has a rate constant of 0.0019 yr -1. ( a) What is the half-life of the reaction? ______ yr (b) How long does it take for [reactant] to reach 12.5% of its original value? ______ yr
December 2, 2011

Physics
1.Two balls, each with a mass of 0.871 kg, exert a gravitational force of 8.23 × 10−11 N on each other. How far apart are the balls? The value of the universal gravitational constant is 6.673 × 10−11 Nm2/kg2. Answer in units of m I got .785 which is ...
December 1, 2011

Physics
The planet Krypton has a mass of 7.1 × 1023 kg and radius of 3.3 × 106 m. What is the acceleration of an object in free fall near the surface of Krypton? The gravita- tional constant is 6.6726 × 10−11 N · m2/kg2. Answer in units of m/s2
December 1, 2011

Physics
A satellite moves in a circular orbit around the Earth at a speed of 6.3 km/s. Determine the satellite’s altitude above the surface of the Earth. Assume the Earth is a homogeneous sphere of radius 6370 km and mass 5.98 × 1024 kg. The value of the universal ...
December 1, 2011

calculus
A spring exerts a force of 4x lbs when it is compressed a distance of x feet. How much work is required to compress the spring a distance of one inch?
December 1, 2011

research & Evaluation II
The F test is used to compare the variances of two samples
November 30, 2011

Great Expectations by Charles Dickens
I'm looking for a word that means "teaching" because I think Great Expectations is all about learning and adapting to all different kinds of experiences and changes; it also has a very interesting and entertaining story plot. I'm trying to create a collage, ...
November 29, 2011

Great Expectations by Charles Dickens
If you had to describe the classic novel, Great Expections, by Charles Dickens, in one word, what would you describe it as?
November 29, 2011

math
Emily surmises that the probability tht she will pass math or chemistry is .95, the probability of her passing math is .7, and the probability of passing both is .55. Find her estimate of the probability of passing chemistry?
November 22, 2011

Pratical English
1. Which one of the following sentences contains an incorrect usage of the singular possessive? A. Mary was dominant among Jesus' disciples. B. The alpha male is often the pack's leader. C. The north forty has always been my family's land. D. Icarus's fate was ...
November 19, 2011

(English) War of the Worlds Book Question
Martian cylinder and the Martian tripod are initially referred to by the narrator as a "Thing." Why do you think that the word "Thing" is capitalized in these references?
November 19, 2011

Chemistry
What is the strongest intermolecular force in a sample of butanoic acid, and why? H H H O . . . .. H .C .C. C .C .O.H . . . H H H Is this structure right?
November 16, 2011

Algebra
-(5x+5)-4+8x
November 16, 2011

Algebra
(x+2)-(x-2)-12x =??
November 16, 2011

Pages: <<Prev | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | Next>>

Search
Members