Friday

October 9, 2015
Total # Posts: 95

**Chemistry **

A 250 g sample of water with an initial temperature of 98.8 c loses 7,500 joules of heat. What is the final temperature of the water ?
*October 3, 2015*

**Math**

Surface area of each solid .round to THE nearest tenth if necesaria. 6cm 5.2cm 7cm 6c
*April 26, 2015*

**algebra (check my answers?)**

looks good
*February 27, 2015*

**math fractions**

Rogelio has 3 one-dollar bills, 5 quarters, 4 dimes, 2 nickels, and 9 pennies. What fraction of the coins are quarters?
*February 27, 2015*

**3rd grade math**

36 / 1.3 =27.69(round up) 28 color pictures
*February 27, 2015*

**3rd grade math**

Justin took photographs during a trip to the mountains. He used one roll of color film and one roll of black-and-white film. He took 1/3 of the pictures in color during a picnic with his family. If he took 36 pictures in all, how many color pictures did he take during the ...
*February 27, 2015*

**math**

8 x .50 =4 + 8= $12 12 x .20 =2.4 -12= $9.60 9.60 x .15 = 1.44 + 9.60= $11.04 11.04 x .60 = 6.62 -11.04= $4.42 final price.
*February 27, 2015*

**3rd grade math**

11/42
*February 27, 2015*

**3rd grade math**

A parking lot near the sports field holds a total of 52 vehicles. There are 42 cars parked there now. Half of these cars are red, 10 are blue, and the rest are silver. What fraction of the cars are silver?
*February 27, 2015*

**math**

You have to multiply the 20 min by the number of student in the class which are 25. Then take the minutes and devide them by the number of minutes in an hour. 20 x 25 = 500 minutes 500/60 = 8.3333 (round down) 8 hrs
*February 27, 2015*

**Accounting**

$273.49 x .35= 95.7215 273.49 + 95.7215=$369.21
*February 26, 2015*

**Accounting**

$5.12 plus 55%= $7.94 price per square yard.(rounded up) 5.12 x .55= 2.816 2.816 + 5.12= 7.94
*February 26, 2015*

**3rd grade math**

Thank you Reed and Nour
*February 26, 2015*

**3rd grade math**

A pile of index cards has a mixture of white, pink, yellow, red, and blue cards. Some cards are lined, and some are unlined. The total number of cards is 150. 2/5 of the cards are blue, 10 cards are white, and 10 cards are red. Half of the remaining cards are pink. How many ...
*February 26, 2015*

**MAth**

Two thirds of the musicians in a 16-piece band are girls. the 16 musicians include 12 brass players. what fraction of the band plays brass instrument?
*February 26, 2015*

**3rd grade math**

:) lol. Thanks again
*February 26, 2015*

**3rd grade math**

I mean the 2/3 of the musicians are girls.
*February 26, 2015*

**3rd grade math**

Steve, Thank you. THat is part of the question that is not needed to solve the problem.
*February 26, 2015*

**3rd grade math**

Two thirds of the musicians in a 16-piece band are girls. the 16 musicians include 12 brass players. what fraction of the band plays brass instrument?
*February 26, 2015*

**Math**

Familling new carpet and wants to know how much carpert they need , but they olso know that carpet is sold by the square yard. 23feetx9feetx6feet x 3feetx10 feetx19feet
*February 9, 2015*

**4th grade math**

24r1
*February 1, 2015*

**English**

is this correct parallel sentence: When the movie Star Wars premiered in 1977, it was both surprising and revolution in its special effects.
*October 13, 2014*

**Math**

Oh I'm stupid, I actual answer is the hundredths is divided into 2000 peices, and then you take something and another something, put those poopies together and boomshakalaka!
*September 23, 2014*

**Math**

Sorry for 2 messages. I accidently hit the send button while i was typing!XD
*September 23, 2014*

**Math**

the hundredths grid is divided into 100 pieces. Now, you shade a whole grid completely. Then , you shade in 65 pieces of another grid to show 1.65. Then, show another grid with 98 pieces shaded in. Don't forget to put in the subtraction sign!! And now your done. Im not a ...
*September 23, 2014*

**Math**

the hundredths grid is divided into 100 pieces. Now, you shade a whole grid completely. Then , you shade in 65 pieces of another grid to show 1.65.
*September 23, 2014*

**science**

Solar energy is mainly caused due to a) Burning of hydrogen in the oxygen b) Fission of uranium present in the sun c) Fusion of protons during synthesis of heavier elements d) Gravitational contraction
*June 19, 2013*

**science**

Hydraulic press is based on a) Archimedes principled b) Bernoulli’s solution c) Pascal/s law d) Reynold’s law
*June 19, 2013*

**science**

The heaviest naturally occurring element is a) Uranium b) Iron c) Silica d) Aluminum
*June 19, 2013*

**science**

The most malleable metal is a) Sodium b) Lead c) Steel d) Gold
*June 19, 2013*

**science**

A boat of mass 40 kg is at rest; A dog of mass 4 kg moves in the boat with a velocity of 10 m/s. what is the velocity of boat? a) 4 m/s b) 2 m/s c) 8 m/s d) 1 m/s
*June 19, 2013*

**science**

Silvering of mirror is done by a) AgNO3 b) Ag2O3 c) Fe2O3 d) Al2O3
*June 19, 2013*

**science**

4.4 g of CO2 contains how many liters of CO2 at STP ? a) 2.4 litre b) 2.24 litre c) 44 Litre d) 22.4 litre
*June 19, 2013*

**geometry**

im still not sure on how to do this
*May 8, 2013*

**geometry**

Shalonda notices that when she stands next to the flagpole, she casts a shadow that is 8 feet long and that the flagpole casts a shadow that is 28 feet long. Little Shalonda is 4 feet tall. How tall, to the nearest foot, is the flagpole?
*May 8, 2013*

**reading**

Renee has a research paper due in three days. She has set aside two hours to complete this task. What is wrong with this study goal? A. It is not significant and can’t be rewarded. B. The goal is not concrete and specific. C. The time she has allotted is not realistic. D...
*April 26, 2013*

**Chemistry**

One reaction of iron with hydrochloric acid is represented by the following thermochemical equation. Fe(s) + 2HCl(aq) ? FeCl2(aq) + H2(g); (Delta)H°= –87.9 kJ How much heat is liberated at constant pressure if 0.215 g of iron reacts with 40.4 mL of 0.579 M HCl? How ...
*March 24, 2013*

**Chemistry**

2M +6HCl–>2MCl+3H2 Delta H= -638.0 Kj HClg—>HCl aq= Delta H -74.8 Kj H2+Cl2–>2HCl Delta H -1845.0 Kj MCl3s–> MCl3 aq Delta H -249.0 Kj Use the information above to determine the enthalpy of the following reaction. 2M +3Cl2–>2MCl3 Delta H...
*March 22, 2013*

**Chemistry**

kj/C not cal/g that's another question I'm working on
*March 22, 2013*

**Chemistry**

At constant volume the heat of combustion of a particular compound is -3378.0 kj/mol.When 1.563 g of this compound ( molar mass of 126.88 g/mol )was burned temp rose 6.991 C. What's the heat capacity of the calorimeter(calorimeter is constant)? Sorry the answer needs to be...
*March 22, 2013*

**Chemistry **

At constant volume the heat of combustion of a particular compound is -3378.0 kj/mol.When 1.563 g of this compound ( molar mass of 126.88 g/mol )was burned temp rose 6.991 C. What's the heat capacity of the calorimeter(calorimeter is constant)?
*March 22, 2013*

**Chemistry**

A 0.464 gram sample of a metal, M, reacts completely with sulfuric acid according to: M(s) +H2SO4(aq)=MSO4(aq)+H2(g) A volume of 211 mL of hydrogen is collected over water; the water level in the collecting vessel is the same as the outside level. Atmospheric pressure is 756.0...
*March 9, 2013*

**Calculus**

At what value of x does the graph of y=9x^(1/3)+x^2 have a point of inflection?
*March 4, 2013*

**Calculus**

The position of a particle moving on a horizontal line is given by s(t)=2t^3-15t^2+24t-5, where s is measured in feet and t in seconds. a: What is the initial position of the particle? b: What is the average velocity of the particle on the interval [0,2]?Indicate units of ...
*March 4, 2013*

**chemistry**

13.5 mols C X(1 m C3H8/ 3m C)=4.5 m c3h8 4.5 miles c3h8 x 11 atoms in c3h8= 49.5 moles of atoms
*March 1, 2013*

**chemistry**

what minimum mass of copper ii nitrate must be added to 70 ml of a .0594 M phosphate solution in order to completely precipitate all the phosphate as solid copper ii phosphate. 2PO4^-3+3Cu(NO3)2-->Cu3(PO4)2+6NO3^-1 I can not come up with the correct answer of 1.17g
*March 1, 2013*

**history**

how did the navajo code-talkers aid marines in battle?
*February 5, 2013*

**history**

i need concrete answer please
*February 5, 2013*

**history**

1.who was the commander of the u.s. navy in the pacific? 2.where did the japanese strike after pearl harbor?
*February 5, 2013*

**history**

thank you!
*February 2, 2013*

**history**

what do you think contributed to the jump in productivity among american workers during world war 2?
*February 2, 2013*

**history**

thank you!
*February 2, 2013*

**history**

why did the national debt rise so quickly during world war 2?
*February 2, 2013*

**science**

1. Identify the phase or phases of matter (solids, liquids, and gases) that apply to each statement. More than one phase of matter may apply to each statement. a. Molecules do not move around, but vibrate in place b. Has volume but no particular shape c. Flows d. Molecules ...
*January 29, 2013*

**science**

how much work was accomplished by the fall?
*January 9, 2013*

**algebra 2**

solve each system by substitution 1. 6x-3y=-33 2xty=-1 2. 2x-y=7 3x-2y=10 3. 4x=8y 2x+5y=27
*January 8, 2013*

**algebra 2**

solve each system by substitution 1. y=xt1 2x+y=7 2. x=y-2 3x-y=6 3. y=2xt3 5x-y=-3
*January 8, 2013*

**history**

thanks
*December 18, 2012*

**history**

what conditions were present in the united states after world war 1?
*December 18, 2012*

**history**

thanks
*December 18, 2012*

**history**

who was the republican candidate who won the election of 1920?
*December 18, 2012*

**social studys**

i think is 3
*November 20, 2012*

**us government **

how is compromise and majority rule a part of congressional politics?
*November 5, 2012*

**complete subject and complete predicate**

this gold ring once belonged to my grandmother
*September 23, 2012*

**chemistry**

How many grams of oxygen are collected in a reaction where 245 mL of oxygen gas is collected over water at a temperature of 25 ^\circ {\rm C} and a total pressure of 688 torr
*April 29, 2012*

**Intermediate Algebra**

Hi another question I have please. Find the midpoint of F A B? A(6,10) B(-20,14)
*April 1, 2012*

**Intermediate Algebra**

The average cab ride cost per mile(x) is given by f(x)=2x+3.50, where x is miles and f(x) is money. A. Find the cost of a 5 mile ride. B. Find the cost of a 3/4 mile ride. C. How many miles can you go in $50?
*April 1, 2012*

**geometry**

Shalonda notices that when she stands next to the flagpole, she casts a shadow that is 8 feet long and that the flagpole casts a shadow that is 28 feet long. Little Shalonda is 4 feet tall. How tall, to the nearest foot, is the flagpole?
*January 13, 2012*

**5th math**

find longest multiplication combination
*November 21, 2011*

**Accounting**

$24000
*November 14, 2011*

**Geometry**

wats the areas of a rectangle... base of : 5m high of: (4a+b)m
*October 3, 2011*

**math**

use mental math to find each value cost of 8 items at $12.98 each
*August 17, 2011*

**Math **

Describe in your own words how to solve a linear equation or inequality
*July 27, 2011*

**chemistry**

what this (ar)3d10 3s2 4p3
*April 20, 2011*

**Chemistry **

which is more concentrated a 1 liter solution containing 30 g of NaCl or a 1 liter solution containing 30g of KCl
*April 4, 2011*

**US History**

Which the bessemer process americans nigth not have Been Abel a Company to build
*October 18, 2010*

**science**

the length of the string is 9.984cm.What is the length of the string to the nearest tenth of a centimeter
*September 22, 2010*

**algebra**

what does x equal in the equation 3x-35=9x-59
*August 24, 2010*

**math prob.**

Why is 72 on monday
*July 25, 2010*

**Thermodynamics and Heat Transfer**

A steam pipe is 75 mm external diameter and is 80 m long. It conveys steam at a rate of 1000 kg/h at a pressure of 2 Mpa. The steam enters the pipe with a dryness fraction of 0.98 and is to leave the pipe with a dryness of not less than 0.96. The pipe must be insulated – ...
*April 21, 2010*

**physics**

A current I = 16 A is directed along the positive x-axis and perpendicular to a magnetic field. A magnetic force per unit length of 0.15 N/m acts on the conductor in the negative y-direction. Calculate the magnitude and direction of the magnetic field in the region through ...
*March 8, 2010*

**human resource managment**

Write a 700- to 1,250-word paper in which you compare and contrast quality management at two organizations in the same industry. • o One organization must compete in the domestic market and one in the global market, such as Southwest Airlines and Lufthansa. • • ...
*February 27, 2010*

**8th grade math**

2 hours 37 min and 30sec because 280*3=840 and 840/320=2.625 0.625*60=37.5 thats the time in min the .5 is 30 sec so its 2 hours 37 min and 30 sec hope this helps
*October 20, 2009*

**Math**

20%
*October 20, 2009*

**12th grade**

26/35
*October 16, 2009*

**8th grade**

how fast dose the jet fly at a rate ho many mph?
*September 22, 2009*

**A Voice: Pat Mora**

what is the tone in A Voice By Pat Mora
*April 23, 2009*

**philosophy**

write a 350-700 word response describing how Socrates’, Plato’s, and Aristotle’s philosophies relate to each other
*November 9, 2008*

**Us History**

The Lousiana Purchase removed a major point of contention between the United States and a European power but left many others. Which areas of possible conflict remained, and what were the sources of these potential conflicts?
*October 16, 2008*

**I donth Get it !...US History**

Did the differing circumstances of Maryland and Virginia's founding affect the course of their respective development? If so, how?
*September 7, 2008*

**Us History**

What problems dogged the early settlements of the Chesapeake region?
*September 7, 2008*

**hystory**

Why did Europeans press westward during this period, instead of concentrating in the more easily defended coastal towns?
*September 6, 2008*

**Math**

10 4/6
*July 5, 2008*

**algebra**

how do i graph this quadratic funtion y=x(squared) + 4x - 4
*March 11, 2008*

**Maths**

solve the equation: 4cos2*theta + 3cos*theta + 3 = 0 for values between 0 and 180 degrees If that is cosine squared in the first term, you have a quadratic equation. Normally cosine squared would be written in ASCII as cos^2 Theta.
*November 26, 2006*

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