Saturday
April 19, 2014

Posts by Emma


Total # Posts: 1,040

physics
Two ice skaters stand at rest in the center of an ice rink. When they push off against one another the 61 kg skater acquires a speed of 0.60 m/s.If the speed of the other skater is 0.90 m/s, what is this skater's mass?

Social Studies
How many people (Jews, Non-Jews, etc.) died in concentration camps during the Holocaust in WWII?

Social Studies
I already got hebrews. If you would look carefully you would see that.

math math math math
math art wrighting spelling

spanish unscramble words
I NEED TWO WORDS UNSCRAMBLED . DATIPSOR AND SCENORIOTC THANK YOU

PreCalculus
Cone Problem Beginning with a circular piece of paper with a 4- inch radius, as shown in (a), cut out a sector with an arc of length x. Join the two radial edges of the remaining portion of the paper to form a cone with radius r and height h, as shown in (b). What length of ar...

science
Thank you soo much damon !!

chemistry
C

pre algebrahow
do you solve a negative fraction plus a posotive fraction?

microeconomics
The marketing division of a firm has measured demand for its product and reports that it is Q = 24 – P, where Q is units and P is price per unit in dollars. The cost is given in the table below. Complete the table and determine the profit-maximizing level of output for th...

Business Communication
revising or editing

3rd grade
Name all the arrays you can manke with each set of tiles 8 tiles, 9 tiles, and 16 tiles

Physics
How much work is required to stop an electron (m = 9.11*10^-31 kg) which is moving with a speed of 1.50×106 m/s?

Physics
In a very simple model of the lower atmosphere, air has a constant density of 1.25 kg/m3. How much would the air pressure change over a height difference of 260 m?

space
How many Earth Diameters would it take to reach the Sun 93,000,000 miles away?

physics
What is the magnitude of the apparent weight of a 69 kg astronaut 5200 km from the center of the Earth's Moon in a space vehicle moving at constant velocity?

physics
A 2100 kg car rounds a curve of 67 m banked at an angle of 13. If the car is traveling at 105 km/h, will a friction force be required? If so, in what direction?

math
4c+2=18

chemistry
What data would you need to evaluate the claim that a certain product neutralizes 47 times its weight in excess stomach acidity?

4th grade
what are the nouns in the sentence: Ryan will learn to swim this summer.

history
i know how to google

history
what was the battle of trafalgar?

history
what was the battle austerlitz?

history
what was napolean like in the north america?

history
how did napoleon declare himself emperor?

history
i know how to google, that's what i've been doing and i'm having no luck

history
you can edit it and change info on it, it's not reliable *i meant good not code

history
wikipedia isn't a code source

history
what was the napoleonic code?

arithmetic
what do you want?

Physics
Two men pull a 31-kg box with forces 9.7 N and 7.6 N. Find the resultant scceleration of the box.

Physics
A car mass of 1330 kg is traveling at 28.0 m/s. The driver applies the brakes to bring the car to a rest over a distance of 79.0 m. Calculate the retarding force.

spelling
go on dictionary . com (no spaces) it's really useful

History
i don't know, i mean, weren't all those people who died for the revolution? so if they didn't die, wouldn't it have gone a lot faster? and didn't they die for no real reason, i mean, they said one wrong thing and they weren't sent to be executed. did th...

History
was the Reign of Terror necessary to preserve the French Revolution?

math
the sum of the input and output equals 10, so it would be 10 for the output of 0

Math
find the greatest four-digit number that has exactly three positive factors.

ap chem
so is this correct: 3330000 grams CH4 0 grams O2 1770833 grams NH3

ap chem
so is this correct: 3330000 grams CH4 0 grams O2 1770833 grams NH3

ap chem
Hydrogen cyanide is produced industrially from the reaction of gaseous ammonia, oxygen and methane: 2NH3(g) + 3O2(g) + 2CH4 -->2HCN + 6H2O(g) a)If 5.00 x 10^3 kg each of NH3 , O2, and CH4 are reacted what mass of HCN will be produced, assuming 100% yield? b)At the end of th...

Chemistry
The buoyant force on a balloon is equal to the mass of air it displaces. The gravitational force on the balloon is equal to the sum of the masses of the balloon, the gas it contains, and the balloonist. If the balloon and balloonist together weight 175 kg, what would the diame...

AP Chemistry
HELP! We're currently studying gases but I dont even know where to start with this question.

AP Chemistry
The buoyant force on a balloon is equal to the mass of air it displaces. The gravitational force on the balloon is equal to the sum of the masses of the balloon, the gas it contains, and the balloonist. If the balloon and balloonist together weight 175 kg, what would the diame...

math
659 x 1357=1357 x n n=

math
6+y=17

algebra
1/6h=9

Math
I don't get how you found the solution. Also I am the first one to post part b) and I dont get how to do it.

Math
When a concrete structure is built, an engineer often performs a slump test on the concrete to ensure that it is of suitable strength and consistency. The engineer fills a truncated cone with a bottom diameter 200mm, top diameter 100mm and height 300mm with concrete. The engin...

math problem
When a concrete structure is built, an engineer often performs a slump test on the concrete to ensure that it is of suitable strength and consistency. The engineer fills a truncated cone with a bottom diameter 200mm, top diameter 100mm and height 300mm with concrete. The engin...

math-bobpursely
Sorry bobpursely, but may I know what the E stands for in your formula? What is the Surface area of a glass bead that has the diameter of 11m? Express your answer to the nearest square mm. radius= .0055m radius^2= 5.5E-3 ^ 2=30.25 E-6m 4PIr^2= about 12*30.25E-6 m

math
What is the Surface area of a glass bead that has the diameter of 11m? Express your answer to the nearest square mm. A glass bead would be a sphere. So the formula for that is--> SA = 4ðr^2 = 4ð(5.5^2) = 380mm^2

math problem
When a concrete structure is built, an engineer often performs a slump test on the concrete to ensure that it is of suitable strength and consistency. The engineer fills a truncated cone with a bottom diameter 200mm, top diameter 100mm and height 300mm with concrete. The engin...

health
what brings energy and oxygen into the body?

math
6r-3=15

math
7d+5=26

physics
A golfer takes three putts to get the ball into the hole. The first putt displaces the ball 15 ft north, the second 9.0 ft southeast, and the third 5.0 ft southwest. What displacement was needed to get the ball into the hole on the first putt?

phsics
so the magnitude will be the same and you have to add 180 degrees to the the original angle right..

phsics
I'm having some trouble with a question how do you find a vector that balances another one

english
Give 5 similaralities between spoken language and text/instant messaging

math
the length of a rectangle is 9in. greater than the width.the area 36in.2 find the dimensions

math
the length of a rectangle is 9in. greater than the width.the area 36in.2 find the dimensions

Algebra
you have to do long division i got x-9 as the answer

physics
An artillery shell is launched on a flat, horizontal field at an angle of α = 31.5° with respect to the horizontal and with an initial speed of v0 = 266 m/s. What is the horizontal distance covered by the shell after 9.44 s of flight?

physic
The velocity vector V1 has a magnitude of 3.0 m/s and is directed along the +x-axis. The velocity vector V2 has a magnitude of 2.0 m/s. The sum of the two is V3, so that V3 = V1+V2 true or false for each question The magnitude of V3 can be -3.0 m/s The x-component of V3 can be...

chemistry
what happens when you cool biodiesel. petroleum-based diesel fuel, and vegetable oil?

Biology
Populations are frequently NOT in equilibrium due to selection or other evolutionary forces. Imagine a population of 100 individuals. Forty-nine of the individuals are homozygous dominant for beady-eye gene, 9 are heterozygous and 42 are homozygous recessive. NOTE: The populat...

physics
The speed limit in a school zone is 38 km/h. A driver traveling at this speed sees a child run onto the road 16 m ahead of his car. He applies the brakes, and the car decelerates at a uniform rate of 8.5 m/s2. If the driver's reaction time is 0.55 s, What is the stopping d...

English
What is the proper name used when using improper words. ie rootin' tootin'?

math
"ThermoStar has been producing residential thermostats for over 50 years. Looking over the past 20 quarters (5 years) of the different product lines, the general manager has been trying to get a handle on sales, costs, and production, and has asked for your help. Your res...

Statistics
Car P(Sale) % Sold Per Sale/ Profit Per Sale VW Golf 10% 15% $1,000 Saab 10% 15% $2,000 BWM Z4 10% 20% $12,000 Skoda Octavia10% 10% $1,200 Lada Niva10% 40% $400 Sum 100% 2.1 What is the expected profit for a VW Golf? 2.2 What is the expected profit for a Saab? 2.3 What is the...

american government
there are five main principles that form the basis of rules that ensure our democratic government. discuss each and present an example that shows how our government is not obeying each principle

Chemistry
How were you able to get the 1.6?

Chemistry
Prepare a 0.0200 mM dye solution at low pH by dilution 0.40 ml of the stock 0.100 mM chemical X into the appropriate volume of 2.5 M HCl. What is the amount of HCL required for dilution, the final concentration of HCl in the solution, and the pH? I know there's the MV = MV...

english
what does being perfect mean?

Career Studies
Hi, I have to do a visual presentation on a current economic or social trend. I'm not allowed to use bristol board/posters or powerpoint/slideshows, because she wants us to be creative. What are some trends I could choose from, and what kind of presentation could I possibl...

chemistry
What is the purpose of removing all the precipitate from inside a beaker?

chemistry
What is the purpose of removing all the precipitate from inside a beaker?

Chemistry
What is the number of moles present in 24.0 mL of 0.500M solution of sodium chloride, NaCl? How many moles are there in 456 g of calcium fluoride, CaF2?

chem can u check answer please
I'm not ure that that is right... [H+] = -log(pH) however, we are given a pOH, not a pH. pH + pOH = 14 pH = 14 - pOH so 14 - 9.262 = pH pH = 4.738 [H+} = 10^-ph = 10^-4.738 [H+] = 1.8281 x 10^-5 M

calc
Three verticies of a parallelogram are D(2,1,3), E(-4,2,0) and F(6.-2,4). Find all possible locations of the fourth vertex.

Pre Algebra
Transversals?

7th grade
what is 1.4 to the 11th power

english
is this sentence clean she buyed some dounuts from the shop she boght some donuts from the shop.

math
3.75qt= qt c

english
does this sentence makes sens she flied over the mountaintop.

Chemistry
A battery is constructed based on the oxidation of magnesium and the reduction of Cu^2+. The initial concentrations of Mg^2+ and Cu^2+ are 1.2*10^-4M and 1.5M, respectively, in 1.0-L half-cells. The initial voltage of the battery is 2.83V with the standard voltage at 2.71V. QU...

english
does this sentence make sesse. he ate a apple.

college economics
Suppose there are two goods. The demand for good 1 is q1=a-bp1+ep2 and the demand for good two is q2=a-bp2+ep1. a and b are strictly positive, |e|<b (1)Compute the optimal prices, and the Lerner index and inverse elasticity of demand for each good. (2)Now suppose the goods ...

economics
Suppose there are two goods. The demand for good 1 is q1=a-bp1+ep2 and the demand for good two is q2=a-bp2+ep1. a and b are strictly positive, |e|<b (1)Compute the optimal prices, and the Lerner index and inverse elasticity of demand for each good. (2)Now suppose the goods ...

Chemistry
A voltaic cell consists of a Pb /Pb^2+ half-cell and a Cu/Cu^2 half-cell at 298K. The initial concentrations of Pb^2+ and Cu^2 are 5.20×10−2 M and 1.40 M, respectively.

english
What changes have you seen in your lifetime with regard to people's attitude towards the environment?

Chemistry Dipole Moments
How do you tell which end of a polar bond is positive or negative? My book says that a molecule such as Hf has a center of positive charge a center of negative charge. But in S--O, how do you tell which end is positive, and which is negative.

trig
which of the following sets gives the x coordinates where the parabola y=x^2+4X-50 and the line y=7x-10 intersect when drawn in the coordinate plane

trig
which of the following sets gives the x coordinates where the parabola y=x^2+4X-50 and the line y=7x-10 intersect when drawn in the coordinate plane

Reading
Just gold eggs in a story that contain snakes, bees, and wolves.

Reading
Why would eggs containing terrible things, are so beautiful on the the outside and eggs containing beautiful things, are plain on the outside?

Reading
Who's point of view is it from, if it's not any of the character's point of view?

Reading
Why is magic important in folktales?

science
What is the storm on Jupiter?

Chemistry
it doesn't say :(. that's the problem word-for-word

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