Wednesday
December 17, 2014

# Posts by katie

Total # Posts: 1,715

Chemistry
If you start with ten grams of lithium hydroxide, how many grams of lithium bromide will be produced? Round to the nearest tenth. Don't forget the units.
January 9, 2011

social studies
This helped me a lot thank you so much!
January 6, 2011

Math
What is the units you measure for area please help fast
January 5, 2011

English
It's Relative Pronoun. David I is wrong because Demonstrative Pronouns are this, these, that and those.
January 4, 2011

physics
nina has a mass of 40 kg and bruno has a mass of 100 kg. they stand on a slippery surface and push off eachother. bruno has an acceleration of 1.0 m/s squared. what is nina's acceleration?
December 22, 2010

PHYSICS
santa drops a package from his sleigh while traveling at constant velocity. if there is no air resistance, with the package hit the ground in front of the sleigh, behind the sleigh, or directly below it? explain reasoning.
December 22, 2010

PHYSICS
does the sun exert a gravitational force on the earth? if so, why doesn't the earth fall into the sun?
December 22, 2010

PHYSICS
assume you have a mass of 100 kg on earth. on the moon, where the gravitation of the moon is 1/6 gravitation of the earth, what is your mass on the moon and what is your weight on the moon
December 22, 2010

PHYSICS
what are the components of a vector that has a magnitude of 1.5 m at the angle of 35 degrees with respect to the positive x axis
December 22, 2010

PHYSICS
Alex is doing tight circles with his car in an empty parking lot, all the while holding his speedometer reading to a steady 20 mph. Is Alex traveling at a constant velocity? Why or why not?
December 22, 2010

A reflecting telescope contains a mirror shaped like a paraboloid of revolution. If the mirror is 4 inches across at its opening and is 3 inches deep, where will the collected light be concentrated?
December 16, 2010

physics
as an object is dropped from a high cliff, which of the following statistics can be made in regard to the objects potential energy?
December 16, 2010

physics
A ship approaches saturn at 10.4km/s and saturns speed is 9.6km/s (relative to the sun). Take the interaction as elastic collision. Saturns mass is greater than the space ship. Find the speed of the ship after it goes around Saturn.
December 8, 2010

physics
ladder of mass m and length l leans against a frictionless wall at an angle of 60 degrees. The coefficient of static friction between the ladder and ground is 0.45. A man whose mass is 4 times the ladder climbs up. How far up the ladder can he go before he slips?
December 8, 2010

economics
what is the history on credit cards?
December 7, 2010

algebra 2
A flagpole at a right angle to the horizontal is located on a slope that makes an angle of 12 degrees with the horizontal. The pole's shadow is 16 meters long and points directly up to the slope. The angle of elevation of the sun is 20 degrees. Draw the triangle. Write an ...
December 7, 2010

If wind blows at a speed of 30 m/s over the roof of your house, what is the pressure diference on your roof between the air inside and the air outside? What net force does this produce on a roof having an area of 175 m^2? 1.3 kg/m^3 is the density of air.
December 5, 2010

Geometry
Point H is the midpoint I'd line segment GJ Line segment GH is 7x-5 HJ is 4x+1 what is the value of X?
December 5, 2010

Physics
For part c, you use the help Ewater+Eiron=the answer from part a. So this would be the set up: (4186*5*delta T)+(448*1.2*delta T)=0.7 20930delta T + 537.6delta T = 0.7 21467.6delta T = 0.7 delta T= 3.26E-5
December 3, 2010

organic chemistry
How would i construct a graph of refractive index versus percent 1-bromooctane for KI and KCl reactions
December 2, 2010

trig
Find the sign of the expression if the terminal point determined by t is in the given quadrant. cos t X sec t in any given quadrant
December 1, 2010

Math
How to solve the simultaneous equations 3x + y = 17 and y = x + 1 ?
December 1, 2010

College Algebra
ln 2+6 ln x+4 ln (x^2=8) How would I rewrite the expression? I'm struggling in Math.
November 30, 2010

physics
Suppose you roll a bowling ball at 2.5 m/s across the roof of a flat building. It leaves the edge and strikes the ground 2.0 s later. How high is the roof? How far from the edge of the roof does the ball hit the ground?
November 28, 2010

physics
Two spheres A and B, where A has twice the mas of B, are projected at the same horizontal velocity off the edge of two different height shelves. Sphere A leaves from a height of 2.0 m. Sphere B leaves a shelf 1.0 m off the floor. If both spheres leave the edge if the table at ...
November 28, 2010

psychology
Surveys suggest that up to 4% of the U.S. population suffers from generalized anxiety disorder. How are anxiety disorders viewed by various psychological perspectives such as psychodynamic, biological, cognitive, and humanistic? With which perspective do you most agree? With ...
November 23, 2010

Chemistry
If the reaction Fe2N(s) + 3/2H2(g) -> 2Fe(s) +NH3(g) comes to equilibrium at a total pressure of 1 bar, analysis of the gas shows that at 700. and 800.K, PNH3/PH2=2.165 and 1.083 respectively, if only H2(g) was initially present in the gas phase and Fe2N(s) was in excess. a...
November 23, 2010

ENGLISH
Did I use the word sublimate correctly in the following sentence? "His stories served as a way to sublimate his anger for his childhood and improve the conditions for nineteenth-century adolescence."
November 20, 2010

Chem
A chemical reaction in a bomb calormeter evolves 4.66Kj of heat. If the heat capcity of the calorimeter is 1.38 Kj/C what is the temperature change?
November 18, 2010

Calc
A 100 inch piece of wire is divided into 2 pieces and each piece is bent into a square. How should this be done in order of minimize the sum of the areas of the 2 squares? a) express the sum of the areas of the squares in terms of the lengths of x and y of the 2 pieces b) what...
November 16, 2010

Physics
A long straight horizontal segment of wire with 0.060 m traverses a west magnetic field with 2.0 T. If a south current with 4.0 A flows through the wire, which one of the following statements concerning the effect of the magnetic force on the wire is true. a) The wire will be ...
November 14, 2010

Geometry
1) Find the lengths of the legs of two possible triangles whose areas would be as close as possible to one square inch without going under. 2) What if the triangle has to be an isoceles triangle? (area must be close to one square inch) (Give answers in ruler-friendly form in &...
November 11, 2010

Math
How do you solve 3/4x+1/2y=10 and -3/2x-y=4?
November 10, 2010

algebra
what is 4p+3q=36 9p+6q=78 ?
November 10, 2010

math
Three numbers in an arithmetic sequence sum to six. If you add 1 to the first number, 2 to the second number, and 5 to the third number, the result will be a geometric sequence. What are the original 3 numbers?
November 8, 2010

Math
i need help with this problem if u know the answer coment the answer below
November 7, 2010

pre-algerbra
I have been working on this problem for an hour and a half! I keep getting 1.33 but I know that's not right!! Jim drove the 120 miles to grandmothers house in 3 hours. He increased the speed by 10 miles per hour on the way home. How long did it take him to drive home?
November 4, 2010

o ok thank you jen
November 1, 2010

i think it is que comida es i am not sure????
November 1, 2010

Accounting
Jan. 1 Merchandise inventory \$144,200 Jan. 1–Feb. 7 Purchases (net) 40,000 Jan. 1–Feb. 7 Sales (net) 70,000 Estimated gross profit rate 40% Estimated merchandise inventory destroyed:
October 28, 2010

Pre Cal
What is the inverse of g(x)= 1/2(x-1)^3-4
October 25, 2010

chemistry 101
how much energy is released when 10 g of steam at 100 degrees celsius is condensed and cooled to body temperature?
October 24, 2010

Finance
Find the least amount that could be deposited in a bank account today at 10% compounded quarterly to allow \$650 withdrawals at the end of each quarter for 8 years?
October 20, 2010

Finance
Gretta wants to retire in 13 years. At that time she wants to be able to withdraw \$12,500 at the end of each 6 months for 10 years. Assume that money can be deposited at 12% per year compounded semiannually. What exact amount will Gretta need in 13 years?
October 20, 2010

Finance
A 46-year-old man deposits a total of \$2000 per period in an IRA until age 65. How much money will be in the account if the interest rate is 10% compounded semiannually with payments made at the end of each semiannual period?
October 20, 2010

Chemistry
The Bohr model stops representing correct atomic structure when? Why? What does this mean for remaining atoms? How does Bohr's model relates to the periodic table?
October 19, 2010

Chemistry
A solution is labeled as ~8M NaOH. How many mL of this solution would be needed to prepare 750mL of a ~0.2M NaOH solution?
October 19, 2010

physics
A 120 N child is in a swing that is attached to ropes 2.20 m long. Find the gravitational potential energy of the child-Earth system relative to the child's lowest position at the following times. (a) when the ropes are horizontal (b) when the ropes make a 29.0° angle ...
October 18, 2010

Chemistry
Mercury and bormine react with each other to produce mercury(II)bromide: Hg + Br2 -> HgBr2 a) What mass of HgBr2 can be produced from the reactiion 10g HG and 9g Br2? [the part that really confuses me] What mass of which reagent is left unreacted? b) What is the mass of ...
October 17, 2010

calculus
Regard y as the independent variable and x as the dependent variable and use implicit differentiation to find dx/dy. y sec(x) = 9x tan(y)
October 17, 2010

english
How do the characters, plot, and theme of The Great Gatsby support or refute the statement that "the Jazz-Age society was a bankrupt world, devoid of morality, and plagued by a crisis of character"?
October 17, 2010

where do you add parenteses to get 6+6/6+6*6=6
October 13, 2010

chemistry
what was the answer to the least accurate balance??
October 11, 2010

Physics
What average force is needed to accelerate a 8.00-gram pellet from rest to 135 m/s over a distance of 0.800 m along the barrel of a rifle?
October 11, 2010

Physics
What average force is required to stop an 1600 -kg car in 8.0 s if the car is traveling at 80 km/h?
October 11, 2010

physics
What force is needed to accelerate a child on a sled (total mass = 65.0 kg) at 1.75 m/s^2
October 11, 2010

If the number is less than 70 and greater than 60, the tens digit has to be 6. Now, if the ones digit is half the tens digit, divide 6 in half. The answer is 63.
October 11, 2010

parallelogram or square
October 10, 2010

english
Its personification It is not all for of them.
October 8, 2010

Pre-calc
The question is solve for cosx= 0.60 on the interval [0,2pi). The answer is to be posted in radians. I don't understand how to find the answer.
October 7, 2010

Chemistry
The specific heat of toluene (C7H8), is 1.13 J/g•K. How many kJ of heat are necessary to raise the temperature of 61.0 g of toluene from 15.0 °C to 37.2 °C?
October 7, 2010

earth
A helicopter is ascending vertically with a speed of 4.00 m/s. At a height of 185 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground?
October 4, 2010

i don't kow how to sole this equation 5x-10=2x-7 can u help me
October 1, 2010

Chemistry
calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from n=7 to n=1. Is it just 6? or how do I do this?
September 27, 2010

Physics
A shotputter throws the shot with an initial speed of 15.6 m/s at a 38.0 angle to the horizontal. Calculate the horizontal distance traveled by the shot if it leaves the athlete's hand at a height of 2.15 m above the ground.
September 27, 2010

Physics
A tiger leaps horizontally from a 5.8m -high rock with a speed of 3.6 m/s. How far from the base of the rock will she land?
September 27, 2010

Physics
A diver running 2.4 m/s dives out horizontally from the edge of a vertical cliff and 2.6 s later reaches the water below. The hieght of the cliff is 33 m. My question is: How far from its base did the diver hit the water?
September 27, 2010

physics
A diver running 2.4 m/s dives out horizontally from the edge of a vertical cliff and 2.6 s later reaches the water below. How high was the cliff?
September 27, 2010

chemistry
what is the mass of 1.22x10^23 molcules of carbon dioxide(co2) and silicon dioxide(Sio2)?
September 20, 2010

chemistry
44 g/mol
September 20, 2010

chemistry
what is the mass of 1 mole of carbon dioxide (CO2), and silicon dioxide (SIO2)?
September 20, 2010

physics
A ball is thrown upward from the ground with an initial speed of 26.2 m/s; at the same instant a ball is dropped from rest from a building 14 m high. After how long will the balls be at the same height?
September 19, 2010

science
_____ contain a fuel, rods to control nuclear reactions, and a cooling system. Would Nuclear reactor work??
September 19, 2010

General Chemistry
A certain protein was found to have 0.855% zinc by mass. Determine the minimum molecular mass of the protein. How do I go about solving this?
September 19, 2010

physics
A rock is dropped from a sea cliff, and the sound of it striking the ocean is heard 3.3 later. If the speed of sound is 340 , how high is the cliff?
September 17, 2010

Geometry
Find the requested angle. The supplement of 135°.
September 15, 2010

Geometry
Glenda wants to glue glitter over a piece of felt shaped like a parallelogram with a height of 36 in. and a base of 46 in. If the glitter costs \$1.20 per ft2 to cover the felt, how much will it cost to cover the felt? A) \$55.20 B) \$1987.2 C) \$165.60 D) \$13.80
September 15, 2010

algebra
CORRECTION LIST THE ELMENETS OF A AND B NOT A UNION B
September 8, 2010

algebra
if A= {xlx is odd} amd B={xlx>7} list the elements of A union B
September 8, 2010

math
7(3x+6)=11-(x+2)
September 1, 2010

English
I had to write five sentences in which I used 5 different tenses. Here is what I wrote: Education helps financial planning by giving basic skills needed for better jobs and higher wages. (Present) Education will help financial planning by giving basic skills needed for better ...
August 26, 2010

math
what's the expression for 6p-16 if p=3?
August 23, 2010

How do most U.S manufacturers montor their factories for compilance with corporate codes of conduct? a. by applying an internal audit system b. by using the services of an independent NGO c. by hiring the for-profit services of a consulting or audit firm d. by inviting a ...
August 13, 2010

College physics
What is the effect of inserting a ferromagnet inside a winding coil where current flows? The effect is to Fill in the Blank 01 (increase/decrease) the magnetic field inside the coil compared to the field that would have been produced in free space. This also Fill in the Blank ...
July 28, 2010

College physics
According to Newton's Third Law, for every action there is an equal an opposite reaction. If the current on the wire is such so that the magnetic force on the wire points upward, what must be true? 1. There is no force on the magnet. All forces act on the wire to keep the ...
July 26, 2010

English?
In the book Andromeda Strain, where is Vandenberg Air Force Base located?
July 25, 2010

algebra
27 5/3 divided by 21 1/3 The answer sheet said 81. How do you get this?
July 23, 2010

College physics
A toy car has a mass of 120g, including two 1.5 V batteries connected in series. Suppose the motor that drives the car is 80\% efficient (i.e., 80\% of the electric energy goes to the drive wheels, 20\% is dissipated as heat) and that friction and air resistance are negligible...
July 17, 2010

college physics
An electron is launched from the negative plate. It strikes the positive plate at a speed of 2.3×10^7 m/s. What was the electron's speed as it left the negative plate? the voltage is 650V and the charge of q1 is 1.7*10^-9 and the charge of q2 is -1.7*10^-9
July 15, 2010

Chemistry
Many analytical instruments require liquid nitrogen. While filling an instrument with liquid nitrogen, an analytical chemist slips and spills the contents of the dewer, 29.0 L, onto the floor. Since the boiling point of liquid nitrogen at 1.00 atm is 77.4 K, all the nitrogen ...
July 14, 2010

Chemistry UPDATED QUESTION
A sample of air contains 78.08% nitrogen, 20.94% oxygen, 0.05% carbon dioxide, and 0.930% argon by volume. How many molecules of each gas are present in 1.00 L of the sample at 35 degrees C and 1.00 atm? Gases to solve for: N2, O2, CO2, and Ar
July 14, 2010

Chemistry
I'm sorry, that should read 78.08% nitrogen
July 14, 2010

Chemistry
A sample of air contains 78.8% nitrogen, 20.94% oxygen, 0.05% carbon dioxide, and 0.930% argon by volume. How many molecules of each gas are present in 1.00 L of the sample at 35 degrees C and 1.00 atm?
July 14, 2010

physics
Two cars, one in front of the other, are traveling down the highway at 25 m/s. The car behind sounds its horn, which has a frequency of 500 Hz. What is the frequency heard by the driver of the lead car? (vsound = 340 m/s). I have the answer but I just don't know how to get...
July 12, 2010

Physics
The motion of a piston in an automobile engine is nearly simple harmonic. If the 1-kg piston travels back and forth over a total distance of 10.0 cm, what is its maximum speed when the engine is running at 3 000 rpm? The answer is 15.7 m/s but I don't understand how to get...
July 9, 2010

how do most US manufacturers monitor their factories for compliance with corportate codes of conduct?
June 30, 2010

english
what are the metaphors used in old ironsides poem
June 26, 2010

freshman english
What are some rhetorical methods of developing a topic?
June 20, 2010

Physics
What angular speed (in revolutions/second) is needed for a centrifuge to produce an acceleration of 1000g at a radius arm of 15.0cm?
June 8, 2010

Physics
At what speed will a car round a 52-m-radius curve, banked at a 45 degree angle, if no friction is required between the road and tires to prevent the car from slipping? (g=9.8m/s^2)
June 8, 2010

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