z
Most popular questions and responses by z
Chemistry
When solutions of KCl and Pb(NO3)2 are mixed, a precipitate forms. Which of the following is the balanced equation for the double replacement reaction that occurs? a. KCl(aq) + Pb(NO3)2 (aq) ¨ KNO3 (aq) + PbCl2 (s) b. KNO3 (aq) + PbCl2 (s) ¨ KCl(aq)
asked on November 30, 2012 
Physics
Adolf and Ed are wearing harnesses and are hanging from the ceiling by means of ropes attached to them. They are face to face and push off against one another. Adolf has a mass of 127 kg, and Ed has a mass of 65 kg. Following the push, Adolf swings upward
asked on October 29, 2008 
Probability & Statistics
To help consumers assess the risks they are taking, the Food and Drug Administration (FDA) publishes the amount of nicotine found in all commercial brands of cigarettes. A new cigarette has recently been marketed. The FDA tests on this cigarette yielded
asked on March 23, 2015 
math
Find the values of the trigonometric functions of t from the given information. tan(t) =1/9 terminal point of t is in Quadrant III sin(t)= cos(t)= csc(t)= sec(t)= cot(t)=
asked on October 29, 2016 
math
you are standing 15 feet from a statue the angle of the elevation from eye level to the top of the statue is 27 degrees, and the angle of depression to the base of the statue is 18 degrees. How tall is the statue? show work
asked on May 17, 2011 
Geometry
parallelogram ABCD: Angle BAC = 35 and angle BCA = 20 How can I find the measure of angle BAD and the measure of angle ABC?
asked on April 1, 2018 
Physics
A lunar lander in powered descent at 100 m above the surface of the moon slows down from a velocity of 20 m/s to 0.5 m/s at constant acceleration. Assume that the lander has a mass of 20,000 kg and that burning the fuel does not change the mass. Answer the
asked on January 6, 2015 
algebra
i need help writing this out.. You have a credit card with a balance of $754.43 at a 13.6% APR. You have $300.00 available each month to save or pay down your debts. a. How many months will it take to pay off the credit card if you only put half of the
asked on April 29, 2019 
physics
A horizontal 810N merrygoround of radius 1.70 m is started from rest by a constant horizontal force of 55 N applied tangentially to the merrygoround. Find the kinetic energy of the merrygoround after 2.0 s. (Assume it is a solid cylinder.)
asked on November 1, 2009 
Physics
Oxygen for hospital patients is kept in special tanks, where the oxygen has a pressure of 62.0 atmospheres and a temperature of 293 K. The tanks are stored in a separate room, and the oxygen is pumped to the patient's room, where it is administered at a
asked on January 6, 2009 
Chemistry
Suppose water contained some harmful volatile substance. How could you easily remove the volatile substance in a laboratory?
asked on September 23, 2015 
Algebra
An 80 x 120 foot rectangular garden is surrounded by a strip of equal width that has the same area as the garden. What is the width of the strip?
asked on May 14, 2019 
Physics
Two people are standing on a 2.2mlong platform, one at each end. The platform floats parallel to the ground on a cushion of air, like a hovercraft. One person throws a 6.1kg ball to the other, who catches it. The ball travels nearly horizontally.
asked on October 24, 2008 
Chemistry
For a particular isomer of C8H18, the following reaction produces 5099.5 kJ of heat per mole of C8H18(g) consumed, under standard conditions. What is the standard enthalpy of formation of this isomer of C8H18(g)?
asked on November 3, 2014 
Physics
Two point sources emit sound waves of 1 m wavelength. The sources are pointed at each other. The sources, 2 m apart, emit waves which are in phase with each other at the instant of emission. a) Where, along the line between the sources are the waves out of
asked on December 11, 2016 
Algebra
Joe and Jodi go canoeing. They paddle upstream 12 miles. On the return strip (with the current) they average 3MPH faster. The total trip takes 8 hours. 1. Find their speed going upstream 2. Find the amount of time it took them to rerun to their starting
asked on May 14, 2019 
Physics
In a diesel engine, the piston compresses air at 305 K to a volume that is 0.0624 of the original volume and a pressure that is 48.5 times the original pressure. What is the temperature of the air after the compression?
asked on January 6, 2009 
Ap Chemistry
explain the difference in boiling points of acetone and 1 proponol. (proponol higher) also explain the difference in water solubility of chloroethane and acetone. (acetone is soluble but not chloroethane)
asked on February 27, 2011 
math
a sticker cost 15 cents and a packet of 8 similar stickers cost 1 dollar clement buy 37 stickers what is the least amount of money that clement of money that clement spend on the stickers
asked on October 17, 2019 
Chem
What is the concentration of a solution made by diluting 85 mL of 6.0 mg/L free chlorine to a final volume of 750 mL?
asked on September 19, 2015 
Gen Chem
Light of wavelength 272 nm shines on a piece of magnesium metal. What is the speed of the ejected electron? (Light energy greater than that of the work function of magnesium ends up as kinetic energy of the ejected electron. The work function is the
asked on January 18, 2010 
Physics
An equilateral triangle has sides of 0.17 m. Charges of 9.0, +8.0, and +2.2 µC are located at the corners of the triangle. Find the magnitude of the net electrostatic force exerted on the 2.2µC charge.
asked on January 26, 2009 
Physics
A hydraulic hoist has a ram of 30 cm diameter and a plunger of 1 cm diameter. If 70 N effort is applied to the plunger and the efficiency is 80%, find the maximum load it can raise.
asked on March 7, 2017 
Math
This task is about choosing a new washing machine. Your washing machine is broken. You need a new one. The new washing machine must hold at least as much as the old one and spin at least as fast as the old one. You used your old washing machine three times
asked on August 16, 2016 
Stats
A testing service has 1000 raw scores. It wants to transform the distribution so that the mean =10 and the standard deviation = 1. To do so ?
asked on February 18, 2010 
Math
Hey! So, I've been working on this problem for awhile but I'm currently a bit dumbfounded on how to solve it. I think this question has been answered before but I still don't quite understand how it works or how to explain it. The problem is as follows:
asked on June 20, 2016 
chemistry
Calculate the pH of a 195 mL solution containing 7.50g of ethylamine (CH3CH2NH2) and 7.50g of ethylammonium bromide (CH3CH2NH3+ Br). The Kb of ethylamine is 4.7 x 104
asked on March 7, 2013 
chemistry
how many grams of magnesium are required to react with 2.0 moles of hydrochloric acid?
asked on February 2, 2013 
Geometry
rectangle FGHK The length of FH is 9 cm. What is the length of GK? C is the center of the rectangle 4 is the height 4.5 measure from F to C 4.5 from H to C
asked on April 1, 2018 
Math (Trig)
A triangle ABC has a trisected angle A. The angle trisectors divide side a (opposite angle A) into three segments which are BD, DE, and DC. The lengths are 2, 3, and 6, respectively. What are the lengths of the other sides?
asked on October 5, 2015 
physics
two cars weighing 1500 kg are made to collide with a wall.the initial and final velocities are 15 m/s and 2.6 m/s.if the collision last for 0.15 seconds,then find impulsive force exerted on the car
asked on June 6, 2013 
english
Hi, I Proofread for wording errors and grammar, but I need help to see if my grammar is proper now. I personally respect every religion, and I love reading holy books. Holy books inspire many people. Holy books taught me many morals and stories on our
asked on June 29, 2012 
statistics
Find a z value to the right of the mean so that 74.5% of the distribution lies to the left of it.
asked on November 29, 2011 
Economics
If the income elasticity of demand is 3/4 and the interest elasticity of demand is 1/4, by what percent does money demand rise if income rises 10% and the nominal interest rises from 4% to 5%. Thanks!
asked on April 3, 2007 
Math
Rupert flew 3/16 of the way around the world but George flew 4/9 as far as Rupert. How far around the world did George Fly?
asked on January 27, 2011 
math
laura has a roll of ribbon there are 29 yards of ribbon on the roll what equation can laura use to find the number of inches of ribbon on the roll
asked on March 9, 2011 
english
Is my sentence punctuated correctly? Even though it is almost summer, we still have overcast skies and light rain.
asked on January 23, 2011 
chemistry
A sample of magnesium (13 g) when heated in air produces 22 g of product. What percent (by weight) of magnesium is present in the product? Answer in units of %.
asked on September 9, 2010 
algebra
One adult ticket and seven children's tickets cost $62. Two adult tickets and eight children's tickets cost $79. How much does one adult ticket cost? How much does one children's ticket cost?
asked on March 31, 2016 
chemistry
An unknown sample with a molecular mass of 180.0g is analyzed to yield 40% C, 6.7% H, and 53.3% O. What is the empirical formula and the molecular formula of this compound?
asked on June 20, 2012 
Maths 7th grade
How do you factorise?
asked on May 17, 2011 
Physics
A small plastic ball of mass 6.30 103 kg and charge +0.150 µC is suspended from an insulating thread and hangs between the plates of a capacitor (see the drawing). The ball is in equilibrium, with the thread making an angle of 30.0° with respect to the
asked on January 26, 2009 
Chem
i don't get this ?.......If the weather forecast stated that the pressure is 104.2kpa. then what is the pressure in the atmosphere? and what would a barometer measure in mm of mercury need help please
asked on January 20, 2009 
Maths B
The running costs of a particular factory consist of two components – a constant charge per week for rent of premises and a variable cost for labour which depends on the number of staff working in the factory in that particular week. The total weekly
asked on March 1, 2017 
Algebra II
((x1)/3x+15))((x+3)/(5x+25)) HOW TO SIMPLIFY THAT???
asked on April 6, 2011 
Business
Where can I find detailed info on all the lawsuits that Microsoft have encountered?
asked on December 5, 2014 
English
To indicate a thought (For example: I'm hungry), do you put quotation marks around the thought as you would do if the thought were spoken out loud, or do you put the thought in italics?
asked on August 28, 2014 
HUMANITIES
WHY DO WE USE THE TERM CLASSICAL TO THE ANCIENT GREEK AND ROMAN CIVILIZATIONS?
asked on January 27, 2008 
Biology
Have to make a model of a cell with all its parts listed. Anyone have an ideal on what to make it out of?
asked on September 17, 2007 
Math
what are the coordinates of the center and the measure of the radius for a circle whose equation is ( x  8)^2 + (y + 4)^2 = 12
asked on April 1, 2018 
Physics 2017
I have a coil of copper wire. I want to know the length of the wire in the coil. I do not wish to unwind the coil and measure the length directly. I find from a table of densities that the density of copper is 8.89x10^3kg/m^3. Explain how I could find the
asked on March 9, 2017 
math
Write the inequality that represents the solution set for −15/9 y
asked on February 20, 2017 
math
So far this year Nick has scored a 75, 81, 88 and 92 on four of his math tests. Each test is worth a maximum of 100 points. To earn a B this year, Nick needs a test average of 80 or better. Write the inequality that represents this scenario. Let t equal
asked on February 20, 2017 
math
Write the inequality that represents the solution set for −15/9y < 11/13 . Please help thanks
asked on February 19, 2017 
computer science
What does it mean when there is a high prior probability in terms of Baynesian statistics?
asked on April 26, 2013 
Math
when testing for a fever, what is the true positive rate for a thermometer that always reads 105 F? What is the false positive rate? **Note: the definition of fever is that the patients temperature exceeds 100 F**
asked on October 14, 2012 
Computer Science
when testing for a fever, what is the true positive rate for a thermometer that always reads 105 F? What is the false positive rate? **Note: the definition of fever is that the patients temperature exceeds 100 F**
asked on October 14, 2012 
adventist
The sum of two consecutive numbers is 37. What are they?
asked on October 12, 2012 
PHYICAL
What is equivalent between points a and b when R=3 R R \/\/\//\/\/\/\/       a   R  b  /\/\/\/\    R  \/\/\/\/
asked on July 9, 2012 
algebra
8^(x+5)=32^(x9)
asked on May 12, 2011 
Algebra II
((x1)/3x+15))((x+3)/(5x+25)) HOW TO SIMPLIFY THAT???
asked on April 6, 2011 
algebra
for the equation y=1/4(x+5)^22, what is the vertex
asked on February 23, 2009 
Science
what is the definition of nutrient?
asked on December 6, 2013 
ecology
I have a Data Analysis Lab that has a graph attached to it. It talks about how temperature affects the growth rates of the two species'. It says that researchers studied the effect and they hypothesized that increasing temperature would increase the growth
asked on September 25, 2013 
PHYICAL
What is equivalent between points a and b when R=3 R R \/\/\/\/\/\/ a /\/\/\b \/\/\/\/
asked on July 9, 2012 
algebra
52x5=15
asked on May 12, 2011 
maths
These questions concern the integers 84, 126, 168 and 294. 1)Choose the option that is the lowest common multiple of the four integers. 2)Choose the option that is the highest common factor of the four integers. Options for them: A) 28 B) 42 C) 63 D) 294
asked on September 11, 2007 
Algebra II
((x1)/3x+15))((x+3)/(5x+25)) HOW TO SIMPLIFY THAT???
asked on April 6, 2011

Math
The Answer Is A
posted on November 24, 2019 
hayley
That could be the case. However, I do not think calling Hayley out on it for everyone to see was a smart move. This should be a 1 on 1 kind of talk.
posted on November 8, 2019 
Social Studdies, Ms. Sue please check!
bruh nah
posted on October 28, 2019 
social studies
a
posted on October 26, 2019 
Government
its all a now a a a a
posted on October 21, 2019 
MATH
Larry ya is not right for connexus! I used the answers and got one out of four 😞
posted on October 17, 2019 
social studies
It's your boy and Hal are right got 100% Thx guys!
posted on October 15, 2019 
Science!
@ I don't even know why I'm alive thx so much 16/16 for connexus people!
posted on October 15, 2019 
Science
Answers for connexus students are: 1.) A 2.) B,C,D 3.) A 4.) B & E 5.) A,D,E Got 100% promise good luck!
posted on October 15, 2019 
Language Arts
You Guys Are Funny
posted on October 14, 2019 
physics
third
posted on March 7, 2019 
Math
Z
posted on January 30, 2019 
English
This thread gave me a good laugh. 😂
posted on November 7, 2018 
algebra
1
posted on July 28, 2018 
Geometry
Is the area incorrect?
posted on April 1, 2018 
Geometry
So the length of GK would also be 9?
posted on April 1, 2018 
Geometry
I think the area is: 8.24621
posted on April 1, 2018 
S.S
C D B 100%
posted on March 7, 2018 
Probability and Statisics
qhat
posted on February 23, 2018 
Math
Right
posted on December 1, 2017 
Math help please
Thank
posted on December 1, 2017 
Language Arts 8A
SHAWN MENDES is BAE IS CORRECT!!SHAWN MENDES is BAE IS CORRECT!!SHAWN MENDES is BAE IS CORRECT!!SHAWN MENDES is BAE IS CORRECT!!SHAWN MENDES is BAE IS CORRECT!!SHAWN MENDES is BAE IS CORRECT!!SHAWN MENDES is BAE IS CORRECT!!SHAWN MENDES is BAE IS
posted on November 27, 2017 
SCIENE ASAP
Gravity Earths core will pull it's self towards it's self.
posted on November 26, 2017 
Social Studies
Well that was something@teacher why are you on this page anyway
posted on September 26, 2017 
geometry
1149
posted on September 6, 2017 
ENGLISH
Consider this quote: "In each of these historical instances . . . mistrust led to misunderstanding, which led to armed conflict." The ellipsis in this quote is appropriate if A. the meaning and spirit of the quote is retained. B. it
posted on July 31, 2017 
Statistics
0.6692
posted on April 16, 2017 
prasad
It depends on the object, but generally the bottom
posted on March 9, 2017 
math
thanks!
posted on February 20, 2017 
math
thank you!
posted on February 20, 2017 
math
ok i think i wrote it wrong the y is a seperate variable its not suppose to be with the 9
posted on February 19, 2017 
math
i put that in and it said it was wrong
posted on February 19, 2017