Tuesday

May 31, 2016
Total # Posts: 2,489

**chem**

a gas mixture is comprised of 32% oxygen and the rest is nitrogen. If the scuba tank is pressurized to a total pressure of 132 atm what are the partial pressures of the oxygen and nitrogen inside the tank? I'm having trouble understanding how to find partial pressures. Can...
*May 30, 2016*

**chemistry**

A 2.00 L flask is filled with propane gas (C3H8)at 1.00 atm and -15.0 Degrees Celsius. What is the mass of the propane in the flask?
*May 24, 2016*

**Chemistry**

How can I make 100ml 0f 2N of HCl? purity is 35% and density is given as 1.18 g/mL
*May 21, 2016*

**Math**

John?
*May 18, 2016*

**Math**

Ms. Sue??
*May 18, 2016*

**Math **

1st question: Which events are not independent? You toss three coins and get one head and one tail. You choose three different ice toppings for a sundae. You draw to colored pencils without replacement and get one red and yellow. You pull a yellow marble from a bag of marbles...
*May 18, 2016*

**Chemistry**

Sulfur trioxide can be produced by the reaction in the gaseous phase, sulphur dioxide with molecular oxygen in the presence of a catalyst. If 128 g branches of SO2 were placed in the presence of 16 grams of O2, that amount of SO3 will be theoretically formed?
*May 17, 2016*

**World Geography**

this is the main human activity that contributes to global warming massive dumping of pesticides into the oceans high demand and depletion of the world's oil supply burning of fossil fuels*** increase levels of chlorine poured into shorelines
*May 16, 2016*

**Geography**

a majority of the greenhouse gas emissions released into the atmosphere is composed of methane*** carbon dioxide oxygen nitrous oxide (my second guess)
*May 16, 2016*

**Math120**

5+6+9=20 5+6=11 11/20
*May 16, 2016*

**Geography**

I just put that as my answer and it was correct so...
*May 16, 2016*

**Geography**

which is not an impact of global warming on ecosystems population explosion among various species warmer weather causes some species to migrate out of their natural habitat in search of cooler temperatures certain species face extinction food supply increases***
*May 16, 2016*

**math**

Anyone please help me! Directions: Follow the instructions below to design a fair race for the new video game Animal Tracks. 1. Choose two animals with different speeds. You can choose from the chart that starts at the bottom of this page or do research to choose your own. (I ...
*May 14, 2016*

**Chemistry**

A current of 2 Amperes is past for 30minutes. Calculate the mass of sodium and the mass of copper deposited.
*May 12, 2016*

**math**

HOW should i start this im confused. The theater arts committee estimated that it would sell 200 tickets for its upcoming play. The committee actually sold 224 tickets. What was the percent error in the committee’s estimate? Round your answer to the nearest tenth of a ...
*May 12, 2016*

**math**

60/215= 28% is this correct?
*May 12, 2016*

**math**

Laketown had 215 inches of snowfall last year, but only 155 inches this year. What was the percent decrease in snowfall for Laketown to the nearest percent? A. 28% B. 39% C. 72% D. 139%
*May 12, 2016*

**math**

What is the value of x? x over 4 equals 14 over 16 x/4 = 14/16 x=3.5 ?!??
*May 12, 2016*

**math**

Raina is saving money to buy a game. So far she has saved $16 , which is one-fourth of the total cost of the game. How much does the game cost?
*May 9, 2016*

**electricity and magnetism**

a battery and two resistors R1 And R2 are connected in series . if R1 is 340ohms and the voltage across R2 is 39% of the battery voltage,find R2.
*May 8, 2016*

**math**

determine which ordered pair is a solution of y=2x-3.
*May 5, 2016*

**Language Arts**

"Happiness Is a Charming Charlie Brown at Orlando Rep" tells about the making of You're a Good Man, Charlie Brown. Like it explains how the play relates to the comic strip. So I am guessing it would be to inform. Because it gives specific details about who took ...
*May 5, 2016*

**World Geography**

Which of the the following is the basis of the traditional Aborigine economy? farming industry mining hunting and gathering***
*May 4, 2016*

**World Geography**

Which geographic feature of Cook Island benefits the growth of crops fertile, volcanic soil*** dry climate proximity to the ocean infrequent sunlight supports the growth of shade plants
*May 4, 2016*

**World Geography**

Which natural recourse is not a common and highly important food source throughout the Pacific Islands bananas cattle pork*** taro root
*May 4, 2016*

**World Geography**

The discovery of _________ caused the creation of new Australian towns jewels and diamands*** bronze pottery gold and mineral deposits furs
*May 4, 2016*

**World Geography**

This geographic feature is the primary reason for a budding economy on Cook Island beautiful beaches and pleasant climates*** beautiful volcanoes tropical plants unique population of fish
*May 4, 2016*

**World Geography**

Islanders living in Beqa, Fiji lived primarily by hunting and eating meat*** by fishing and cultivating tara by gathering nuts for exports by eating plants
*May 4, 2016*

**World Geography**

During the late 18th and mid 19th centuries, Europeans and North Americans were attracted to nearby coastal waters due to potential economic gains from catching trout and cod fish catching seals and whales shipbuilding finding riches on unexplored islands***
*May 4, 2016*

**Math**

Mai has a piece of cloth that is 8.35 meters long. How many 15 centimeter pieces can she cut from the cloth? How much will be left over?
*April 29, 2016*

**algebra**

why is f(x)=|x-5| not linear ??? and how can one figure out that it's not linear ???
*April 28, 2016*

**algebra**

what are the two requirements for a proportional relationship ????
*April 28, 2016*

**physics **

A 10kg block slides towards the 3kg moving block to create a totally inelastic head on collision. The 3kg block comes to a stop after the collision. 1. What speed must the 10kg block be moving at prior to the collision for this to occur? 2. Instead of sliding along a ...
*April 27, 2016*

**physics**

home / study / science / physics / questions and answers / a 10kg block slides towards the 3kg moving block ... Your question has been answered! Rate it below. Let us know if you got a helpful answer. Question A 10kg block slides towards the 3kg moving block to create a ...
*April 27, 2016*

**physics**

home / study / science / physics / questions and answers / a block of mass 3kg s sliding along the frictionless ... Question A block of mass 3kg s sliding along the frictionless horizontal surface with a speed of 2m/s. 1. What is the kinetic energy of the block? 2. A wedge is ...
*April 27, 2016*

**science 6th grade**

1.the nose diaphragm and lungs are part of the_________system circulatory excretory nervous respiratory(my answer)
*April 25, 2016*

**Economic**

A detailed explanation, with graphs of how the price of milk would have been determined in the absence of government involvement in market
*April 25, 2016*

**life orientation**

1 harassment 2.the arrests 3.sexual harassment
*April 18, 2016*

**Life orentation**

Right to education and health and work
*April 17, 2016*

**life orientation **

by being abused at home or any way of beaten and raped that's human rights violation and discrimination is to call the people by using bad names.
*April 13, 2016*

**physics**

A light spring of constant k = 95.0 N/m is attached vertically to a table (figure (a)). A 2.70-g balloon is filled with helium (density = 0.179 kg/m3) to a volume of 4.00 m3 and is then connected to the spring, causing the spring to stretch as shown in figure (b). Determine ...
*April 11, 2016*

**physics**

A 1.00-kg beaker containing 2.29 kg of oil (density = 916 kg/m3) rests on a scale. A 2.33-kg block of iron is suspended from a spring scale and is completely submerged in the oil (see figure below). Find the equilibrium readings of both scales. top scale N bottom scale N
*April 11, 2016*

**physics**

A light spring of constant k = 95.0 N/m is attached vertically to a table (figure (a)). A 2.70-g balloon is filled with helium (density = 0.179 kg/m3) to a volume of 4.00 m3 and is then connected to the spring, causing the spring to stretch as shown in figure (b). Determine ...
*April 10, 2016*

**physics**

A 1.00-kg beaker containing 2.29 kg of oil (density = 916 kg/m3) rests on a scale. A 2.33-kg block of iron is suspended from a spring scale and is completely submerged in the oil (see figure below). Find the equilibrium readings of both scales. top scale N bottom scale N
*April 10, 2016*

**physics**

Piston circled 1 in the figure below has a diameter of 0.28 in.; Piston circled 2 has a diameter of 1.6 in. In the absence of friction, determine the force vector F necessary to support the 500-lb weight. in lb i got 1.53 lb but it is incorrect
*April 10, 2016*

**physics- help me please **

The pressure at the bottom of a glass filled with water (ρ = 1000 kg/m3) is P. The water is poured out and the glass is filled with mercury (ρ = 13.6 ✕ 103 kg/m3). The pressure at the bottom of the glass is now which of the following? a)equal to P b)smaller ...
*April 8, 2016*

**physics- help me please**

Suppose you have two cubic meters of uranium, four cubic meters of lead, four cubic meters of copper. Rank them by mass, from smallest to largest. a)lead, copper, uranium b)uranium, copper, lead c)copper, uranium, lead d)uranium, lead, copper can someone help me
*April 8, 2016*

**math probability**

thanks!
*April 7, 2016*

**math probability**

Two friends were each rolling a die. After they rolled, they found the sum of the numbers showing on each die. What is the probability that the sum is 7? I added the sides together and simplified to get 1/6, but I don't think that's right.
*April 7, 2016*

**Math/Algebra**

Rashid picks 420 strawberries in 5/6 hour. Write and solve an equation to find how many strawberries can she pick in the space of an hour? I'm not good with word problems, and am completely lost. I can do everything except the equation (I think). Please help!
*April 4, 2016*

**history**

What was Robert Lindeux’s purpose in painting this event? What evidence in the painting suggests his purpose?
*March 31, 2016*

**Art**

Can someone check my answers?
*March 31, 2016*

**Polynomials **

Write and simplify the polynomial represented by the model. (Model shows: 3 big blank squares, 2 long black rectangles, 3 small blank squares, 1 big black square, 6 small black squares) a. -2x^2 + 2x + 3 b. 2x^2 - 2x - 3 c. 3x^2 - 2x - 3 d. 2x^2 - 2x + 3
*March 25, 2016*

**Math**

in every bag of m/m's, 30% are red. If 52 m/m's are in the bag, what % are not red.
*March 24, 2016*

**Chemistry**

The solubility of sodium chloride is 35.9/100 ml in STP, try dissolving 1 kg of salt in 1 l of water what happens? how much salt will be dissolved and how much salt will be insoluble?
*March 23, 2016*

**math **

so if a trapezoid has 4 sides and the top(short) side and the two not parallel sides are all 5 inches long, what are possible lengths for the long (bottom) side? and are there more than 1 possible solution?
*March 22, 2016*

**math**

if a trapezoid has 3 sides that are all 5 inches long what are the possibilities for the long side? Like can it be 5 to make it a square?
*March 22, 2016*

**probobility**

Thank you! I was able to do A & B but c,d,& e I would figure out. thanks again
*March 22, 2016*

**probobility**

4 -letter "words" are formed using the letters A, B, C, D, E, F, G. How many such words are possible for each of the following conditions? (a) No condition is imposed. Your answer is : Preview (b) No letter can be repeated in a word. Your answer is : Preview (c) Each...
*March 22, 2016*

**Chemistry - Gas Laws **

Pressurized carbon dioxide inflators can be used to inflate a bicycle tire in the event of a flat. These inflators use metal cartridges that contain 16.0 g of carbon dioxide. At 295 K, to what pressure (in psi) can the carbon dioxide in the cartridge inflate a 3.15-L mountain ...
*March 22, 2016*

**chemistry**

Consider the following mechanism: STEP 1: A ---> B +C (slow) STEP 2: C+D ---> E (fast) OVERALL: A+D---> B+E Determine the rate law for the overall reaction (where the overall rate constant is represented as k). please help me. how do i do this problem?
*March 20, 2016*

**maths**

5 miles = 8Km - got it now - so no need to respond!
*March 20, 2016*

**maths**

A car travels 40 miles per gallon of petrol. How many kilometres can it travel on 5 gallons of petrol? (From a KS2 CGP SATs question book). The solution in the book says 40/5 = 8 8x8=64 64x 5 = 320Km I get the 64x5 =320Km, but not the first bit. Can anyone help please?
*March 20, 2016*

**CHEM**

Consider the following mechanism: STEP 1: A ---> B +C (slow) STEP 2: C+D ---> E (fast) OVERALL: A+D---> B+E Determine the rate law for the overall reaction (where the overall rate constant is represented as k). please help me. how do i do this problem?
*March 19, 2016*

**History**

C B B A These are 100% correct. Hope you enjoy =)
*March 18, 2016*

**math**

If Building A had 8 more storeys than Building B, it would have 2 more than half a building with 46 storeys. How many storeys are there in Building B
*March 18, 2016*

**Trigonometry**

What is the smallest positive value of x that satisfies x= Arc cos 1/2
*March 17, 2016*

**Trigonometry**

For all values of x for which the expressions are defined, prove the following equation identity 2/sec = 2-2 sin^2 x/ cos x
*March 17, 2016*

**math **

Thomas has a letter he wants to send to his girlfriend. the total perimeter of the blue stamp and envelop is 50 cm. the ratio between them is 1:4. What is the perimeter of the stamp? So I know that I need to let x be the width of the stamp and the width of the envelope be 4x. ...
*March 17, 2016*

**Science**

B C B A These are 100% answers. I swear to God.
*March 15, 2016*

**Social studies**

It's B I do believe.
*March 15, 2016*

**Math **

Let P be the point (0,-1) and Q be the point (3,2). In this Cartesian coordinate system, find the point on the line segment PQ that is twice as far from P as from Q. Please help, I need this for a test and i have totally forgotten the formula and notes and how to do anything ...
*March 15, 2016*

**math**

Thanks Steve
*March 14, 2016*

**math**

In Mrs.Marshall's classroom, 6/7 of the students play sports. Of the students who play sports, 4/5 also play an instrument. If there are 35 in her class how many play sports and an instrument?
*March 14, 2016*

**Health**

yes i believe it is c
*March 11, 2016*

**math**

witch benchmark fraction could you use to estimate the product of 36 times 11/16
*March 10, 2016*

**physics**

Assumed that north is the y-direction and east the x-direction. You are piloting the boat that moves at a constant speed of 10 km/hr relative to the water beneath it. 1) On a body of still water, you point your boat due north for 2hr, then turn due east and continue for ...
*March 8, 2016*

**physics**

Also time = 3/cos45 not 30
*March 8, 2016*

**physics**

is hi equal to zero?
*March 8, 2016*

**physics**

A projectile is launched from ground level at an angle of 45 degrees above the horizontal with a speed of 40m/s. It is aimed straight towards a high wall that is a horizontal distance of 120m away from the launch point. a) How much time will the projectile spend in the air ...
*March 8, 2016*

**Physics**

A solid disk rotates in the horizontal plane at an angular velocity of 0.0684 rad/s with respect to an axis perpendicular to the disk at its center. The moment of inertia of the disk is 0.190 kg·m2. From above, sand is dropped straight down onto this rotating disk, so ...
*March 3, 2016*

**Social Studies**

All are correct :) I got the first one wrong from my answers, so thanks for the help.
*March 3, 2016*

**History**

Wait no I think it's Ireland. Is that correct?
*March 2, 2016*

**History**

Famine caused people from which country to immigrate to the U.S.? A. Britain B. Ireland C. Spain D. Germany***
*March 2, 2016*

**History**

Thanks! :)
*March 2, 2016*

**History**

By 1860 the Midwest and the East were united by a network of A. Roads B. Railroad tracks*** C. Canals D. Steam-powered ships Am I correct? :)
*March 2, 2016*

**Math final exams **

Hi, my name is Anna. In a month we are taking final exams. What can i do to prepare and study?
*February 29, 2016*

**Studing math.**

Hi. I got a question. I am almost about to take the state test(AZmerit) I feel worried. What may i do? I am in the fourth grade.
*February 27, 2016*

**qusestion**

that right alexiss
*February 24, 2016*

**qusestion**

how can i be like you guys ? because i wanted to help kids with here homework.
*February 24, 2016*

**Philosophy**

Does "identical" mean SameShape or SameSize in Tarski's World?
*February 22, 2016*

**Philosophy**

exercise 5.8 write an informal proof of Premises: LeftOf(a,b) | RightOf(a,b) BackOf(a,b) | ~Leftof(a,b) FrontOf(b,a) | ~RightOf(a,b) SameCol(c,a) & SameRow(c,b) conclusion BackOf(a,b) State if you use proof by cases.
*February 22, 2016*

**Algebra**

The amount of money you earn mowing lawns at $15 per lawn? A=$1.50+$.80
*February 22, 2016*

**Math please help urgent!!**

2. If m<1=43, what is m <4? 53 43****** 37 27 3. If m <1=43, what is m <5? 50**** 40 35 25 <=the angle sign Unfortunately i can not link the graph. But it is horizontal and a vertical crossing line then a diagonal line drawn through each right angle mke by the ...
*February 18, 2016*

**Physics **

What release height would be required for a 5 micrometer spherical spore to drift from africa to south america (distance =3200km)? assume spore density is 1.2. assume steady 6m/sec horizontal wind from africa to s.america.
*February 16, 2016*

**Math**

Okay. in fact i do have an acount on khan academy! thank you mrs. Sue, Anna
*February 15, 2016*

**Math**

I need help with basic multiplication. I do not really understand it from the two times table to the twelfth times table. Can you help me?
*February 15, 2016*

**Social Studies-Please Help**

I'm pretty sure the answer is China.
*February 15, 2016*

**Math**

Sorry, I'm confused. Why?
*February 12, 2016*

**Math**

Chaz is a college student. He has a checking out balance of -$52.00. His roommate Will's checking out balance is -$59.25. Chaz thinks that Will owes more to the bank than Chaz does. Is Chaz correct?
*February 12, 2016*