Thursday
November 20, 2014

Posts by samuel


Total # Posts: 158

Physics
A car travels 2.06 km in the x-direction, then turns left 70.3 degrees to the original direction and travels an additional distance of 4.23 km. Calculate the x component of the car’s net displacement. Let : d1 = 2.06 km, theta = 70.3 degrees , and d2 = 4.23 km.
February 1, 2011

algebra
1<3x+5<12
January 16, 2011

5th grade math
144
December 14, 2010

college
A 5.1 kg object initially at rest at the origin is subjected to the time-varying force shown in Figure P5.25, with the vertical axis in 4 N increments. What is the object's velocity at t = 6 s?
December 6, 2010

Probability and Statistics
Can someone tell me what formula I should use? The number of milligrams of tar in filtered and unfiltered cigarettes is being compared. The following cigarettes are pulled to be part of the samples: Filtered: bunch of data Unfiltered: bunch of data The first question is create...
November 30, 2010

Statistics
A popular casino in Windsor estimates that the chance that someone sitting at one of their Black Jack tables has a 0.35 probability of winning a given hand. Assume that all games played are independent. a. Isaac decides to play until his first win, and bets $50 per game. When ...
November 24, 2010

Literature
Can anyone point me in the right direction? I need to know which play made the line Drama Kings and Queens unite!. I have tried using several search engines with no avail. Just a hint at the author would be good.
November 9, 2010

English Literature
Can anyone tell me which Play the Phrase, "Drama Kings and Queens, Unite!" came from ar at least point me in the right direction?
November 9, 2010

math
Aspider travels at a speed of 1.17 miles per hour. At this rate, about how far can a spider travel in 3 hours?
November 4, 2010

Chemistry Help
using your method i got 0.45moles,is that correct?
October 15, 2010

Chemistry Help
If it takes three "breaths" to blow up a balloon to 1.2 L, and each breath supplies the balloon with 0.060 moles of exhaled air, how many moles of air are in a 3.0 L balloon? i am trying to use v1/n1=v2/n2 but i am stuck, can u help? thank you
October 15, 2010

spanish 1
durante el dia (pasar) tiempo con mis amigos, what would be the form for the subject
October 11, 2010

Chemistry
1. You have gone back in time and are working with Dalton on a table of relative masses. Following are his data: 0.602g gas A reacts with 0.295g gas B 0.172g gas B reacts with 0.401g gas C 0.320g gas A reacts with 0.374g gas C a) Assuming simplest formulas (AB,BC,AC) construct...
September 6, 2010

Chem 101 science
Rank the following samples in number of atoms from least to greatest. a) 2 mol of K atoms b) 48 g of S c) 27 g of Be d) 50 g of Na
August 26, 2010

Chem 101. Science
Rank the following samples in mass from least to greatest. a) 2 x 1023 S atoms b) 0.25 mol of Cu atoms c) 2 mol of N atoms d) 6 x 1023 Na atoms
August 26, 2010

Chem 101
Consider the reaction of 82.0 g of oxygen as follows: 4Fe + 3O2 2Fe2O3 How many moles of oxygen react? How many moles of iron must react? How many moles of product form? What mass of product forms?
August 26, 2010

arithmetic
An auditorium has 20 rows of seats.These are 20 seats in the first row,21 in the second row and 22 in the third row and so on.how many seats are there in all rows?
August 25, 2010

MATH
ADDING LITERS 1/2 , 3/4 AND 7/8 SOLUTION; 1/2=4/8, 3/4=6/8 AND 7/8 ANSWER? 14/8 PUZZLE!
July 20, 2010

Grammar and Composition
The poor children of the village were left destitute. look up the definition and you will see by the examples that this is the correct usage.
April 23, 2010

Biology
How does temperature affect the solubility of oxygen in water?
April 23, 2010

physics
find the resultant of vectors A of magnitude 10units in the direction N40E and B of magnitude 8units in the direction S30E
April 16, 2010

economics
Given that the monopolist demand curve is Qd=200-2P, TC=#900 and P= #55. What is the total profit?
April 9, 2010

AP BIO
If a particular experiment were known to have a transformation efficiency of 3 x 103 bacteria/ìg of DNA, how many transformant colonies would be expected to grow on the LB/amp/ara plate?
April 7, 2010

business
Which financial ratios would you consider most useful? Would these ratios be different than the ones you would consider useful as an investor? Why or why not?
April 1, 2010

Science
Why are spurgeons important to theie ecosystem?
March 15, 2010

Financial Engineering
Describe a potential arbitrage strategy if a put price is the same as the negative of a forward if the strike are the same. You need to specify the number of units you would long/short for each instrument, initial cash flow, and final cash flow. An arbitrage oppotunity arises ...
March 12, 2010

Calculus
A boat is pulled into a dock by a rope attached to the bow of the boat and passing through a pulley on the dock that is 1 m higher than the bow of the boat. If the rope is pulled in at a rate of 1.4 m/s, how fast is the boat approaching the dock when it is 9 m from the dock?
March 2, 2010

Calculus
A voltage V across a resistance R generates a current I=VR. If a constant voltage of 4 volts is put across a resistance that is increasing at a rate of 0.3 ohms per second when the resistance is 4 ohms, at what rate is the current changing? (Give units.)
March 1, 2010

Calculus
At noon, ship A is 20 nautical miles due west of ship B. Ship A is sailing west at 23 knots and ship B is sailing north at 17 knots. How fast (in knots) is the distance between the ships changing at 5 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)
March 1, 2010

chem
why does fluorine have a higher ionization energy than iodine?
January 24, 2010

chem
why do elements in the same family generally have similar properties?
January 24, 2010

chem
what does the heating curve of ethanol look like? im really confused about this...
January 21, 2010

CHEM
on a heating curve graph...what factors determine the lengths of the flat regions of the graph and slope of the curve between the flat regions
January 21, 2010

French
What can you find in Santa Claus' bag? descramble "ELASEL" (in french) I need help....
December 18, 2009

s
unscramble "elasel" in french; unscramble "ionmaes" in french. Thank you
December 17, 2009

chem
22.25 ml?
December 14, 2009

chem
3.56mL?
December 14, 2009

chem
What volume of 0.200 M H2SO4 will be needed to neutralize 50mL of 0.178 N NaOH? i don't even know how to start
December 14, 2009

Social Studies
When water sinks into the soil, what does it become?
September 11, 2009

college(natural disasters)
How can the magnatic record inside a valcanic roskbe used to determine the latitude at which the lava cooled?
September 7, 2009

natural disasters
how can the magnatic record inside a valcanic roskbe used to determine the latitude at which the lava cooled?
September 7, 2009

English
For example, when people ask "We don't have to hand in the assignment right?" Why do some people answer "No." (They meant the assignment does not have to be handed in.) But if so, should the answer be "Yes." (Yes, that's right, we don'...
May 15, 2009

Math
Dear Readers, I am a 6th grader that recently took a math test. I got a question wrong, and I think it was because I don't know the definition to the question. Can you please tell me what an interval in mathematical terms is. Please give me something a 6th grader can ...
March 5, 2009

statistics
Which of the following is an example of nominal data? a. ocean temperature at seven beaches along the east coast of the U. S. b. 1st, 2nd, and 3rd place finishers of the 2005 Boston Marathon c. morning commute (in miles) of professors at DeVry University - Phoenix d. account ...
February 4, 2009

5th grade
bbbnbbvhv
January 8, 2009

calculus
Find the points on the curve y = 2x^3 + 3x^2 - 12x + 1 where the tangent is horizontal
October 14, 2008

physics
Alley club-ax consists of a symmetrical 8 kg stone attached to the end of a uniform 2.5 kg stick that is 98 cm long. The dimensions of the club-ax are that the stcik is 80 cm across and the stone is tied to the stick is 18 cm long. How far is the center of mass from the handle...
October 13, 2008

physics
Three balls A, B, and C, with masses of 3 kg, 1 kg, and 1 kg, respectively, are connected by massless rods. What are the coordinates of the center of mass?
October 13, 2008

physics
A water molecule consists of an oxygen atom and two hydrogen atoms. Oxygen has a mass of 16 atomic units (u) and each hydrogen has a mass of 1 u. The hydrogen atoms are each at an average distance of 96 pm ( 96 x 10 -12 m) from the oxygen atom, and are separated from one ...
October 13, 2008

HISTORY
what features of the welfare state did the new deal create?
October 13, 2008

physics
A pendulum consists of an object of mass 1.07 kg that hangs at the end of a massless bar, a distance 1.14 m from the pivot point. Calculate the magnitude of the torque due to gravity about the pivot point if the bar makes an angle of 22° with the vertical. torque = ...
October 13, 2008

physics
An athlete at the gym holds a 4.33 kg steel ball in his hand. His arm is 75.0 cm long and has a mass of 5.28 kg. What is the magnitude of the torque about his shoulder if he holds his arm straight out to his side, parallel to the floor? Responses Physics - bobpursley, Saturday...
October 13, 2008

chemistry
Phosgene (COCl2) is an extremely poisonous gas that was used extensively in World War I as a chemical warfare agent. At 300oC, phosgene decomposes to carbon monoxide and chlorine with a Kp = 6.8 x 10-2. Calculate the pressure in the vessel at equilibrium after placing 5.00 ...
October 13, 2008

HISTORY HELP
I'm reading my book and from what i'm getting here is that the progressives demanded a more activist government but what im not understanding is how they justified their demands.
October 12, 2008

Algebra
Write the slope-intercept form of an equation for each line, given either the slope and the y-intercept or the coordinates of two points. (5, -3) and (-4, -3)
May 5, 2008

Algebra
Determine whether the graphs of the equations are parallel, perpendicular, or neither. y=-x+2 y=-x-3
May 5, 2008

drug chart help
Does anyone know a site that has information about drugs (narcotics, stimulants, depressants, hallucinogens, etc...) with the following info: Name of Drug Slang Name Source How it Looks How it's Used Short Effect Duration Physical (Yes/No) Psychological Addiction (Yes/No) ...
January 10, 2008

physics
A:0.124764 meter
October 9, 2007

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