Monday
July 28, 2014

Posts by Natalie


Total # Posts: 481

Chemistry
A piece of copper metal is initially at 100 C. It is dropped into a coffee cup calorimeter containing 50.0 g of water at a temperature of 20 C. After stirring, the final temperature of both copper and water is 25 C Assuming no heat losses, and that the specific heat (capacity)...

Chemistry
A piece of copper metal is initially at 100 C. It is dropped into a coffee cup calorimeter containing 50.0 g of water at a temperature of 20 C. After stirring, the final temperature of both copper and water is 25 C Assuming no heat losses, and that the specific heat (capacity)...

Physics
Compute the final temperature.

Physics
A Jaguar XK8 convertible has an eight-cylinder engine. At the beginning of its compression stroke, one of the cylinders contains 499 cm ^ 3 of air at atmospheric pressure (1.01\times 10^5 Pa}) and a temperature of 27.0 degrees C. At the end of the stroke, the air has been comp...

Physics or Math
Yay thanks, thought it was simple thank you.

Physics or Math
I thought maybe I mixed up the order, and that I should have done (3,0,0) - (-1.3,2.4,0), point minus "effective origin" (the rotation axis) which makes more sense, this changes it to 12.67k, is that correct?

Physics or Math
A force F = 0.8 i + 2.5 j N is applied at the point x = 3.0 m, y = 0 m. Find the torque about the point x = -1.3 m, y = 2.4 m. Hmm, (this is essentially just a vector problem) I know you're supposed to find the position vector r and take the cross product of r x F, the fo...

math
3 sail boats to 6 fan boats

Math
The panels for the Pulsar 32-inch TV are manufactured in three locations and then shipped to the main plant for final assembly. Plants A, B, and C supply 50%, 30%, and 20%, respectively of the panels.The quality-control department of the company has determined that 1% of the p...

Physics
An Earth satellite moves in a circular orbit at a speed of 5800 m/s. a)What is the radius of the satellite's orbit? b) What is the period of the satellites orbit in hours?

physics
A mass of 2.6 kg lies on a frictionless table, pulled by another mass of 4.7 kg under the influence of Earth’s gravity. The acceleration of gravity is 9.8 m/s2 .If the acceleration of the object has a magni- tude of 3.5 m/s2, what is the angle θ between the two force...

early child care
D.

Physics
You will fire the spring gun 3 times from the first detent and measure the change in height of the (pendulum + ball) for each shot. Write the equation for the change in height of the first shot.

algebra
M --- +. 5= -2 3.

Early childhood education
For this assignment, you are asked to design a Plan-Do-Review activity. Be sure to describe in detail each stage of the process (student involvement in the planning, what students would actually do, and what specific questions you would ask during the review stage of the proce...

Early childhood education
For this assignment, you are asked to design a Plan-Do-Review activity. Be sure to describe in detail each stage of the process (student involvement in the planning, what students would actually do, and what specific questions you would ask during the review stage of the proce...

Early childhood education
For this assignment, you are asked to design a Plan-Do-Review activity. Be sure to describe in detail each stage of the process (student involvement in the planning, what students would actually do, and what specific questions you would ask during the review stage of the proce...

Stats
A large population has a mean of 200 and a standard deviation of 40. Which one of the following best describes the percentage of measurements that fall in an interval that is within two standard deviations of the mean?

Physics
The function ax(t) describes the acceleration of a particle moving along the x-axis. At time t=0, the particle is located at the position x0 and the velocity of the particle is zero. ax(t)=a0e−bt The numerical values of all parameters are listed below: x0=980 m a0=500 m...

Physiology
Why does a solution of Haemolysed red blood cells look clear instead of cloudy?

Chem
Can a 100ml sample of 3.0m H2 SO4 could be neutralized by 100 ml of 3.0m NH3

College Physics
A person who is properly constrained by an over-the shoulder seat belt has a good chance of surviving a car collision if the deceleration does not exceed about 30 "g"s (1.0 g= 9.8m/s^2) Assumind uniform deceleration of this calue calculate the distance over which the...

Physics PLEASE HELP!
How many molecules are there in 0.029 moles of carbon dioxide gas, CO2? I asked this today, and the person told me to do 0.029 * 6.022e23 and my answer was wrong :/ Can someone please tell me what my answer should be!!?

Physics
How many molecules are there in 0.029 moles of carbon dioxide gas, CO2?

phsical science
a tire contains air ata pressure of 2.8 bar at 10 degree celsius.if the tires volume is unchanged what will the air pressure in it be when the tire warms up to 35 degree celsius if the car is driven.

Chemistry
If 45.5 mL of He at 25.0°C and 101.3 kPa were heated to 75.0°C, what would be the volume?

Math
Write the equation of a line in slope intercept form that is parallel to the line y= 1/3x+ 5 and passes through (-9, 5). Do not use any spaces. Slope should be a reduced improper fraction.

Accounting
T/F Questions The main reason that the bank statement cash balance and the company's cash balance do not initially balance is due to timing differences. Sales Discounts is a revenue account with a credit balance. Multiple Choice: Assuming a 360-day year, proceeds of $48,75...

Algebra
Bayside Insurance offers two health plans. Plan A pays $90 + 40%. Plan B pays $140 + 35%. Giselle would savfe with plan B if she had more than ---in bills.

Life Orientation
Identify and describe one environmental problem that causes crises,ill health,and disasters in South Africa?

Reading
What is the scene illustration-reflective plot

life orientation
The growth in the environment is growing and people pollute the area by burning their rubbish and even their cars exhaust pipes that pollutes the air.Many people doesn't care about the environment but rather kills it than looking after it!

Financial Accounting
Is Depreciation expense recorded in the General Journal?

Math
8 = 6 + p/2 *The p/2 is not dividing it's p over 2 like in a fraction.

science
Name the type of reaction that the equation represents? 2Cu + O2 -------> 2CuO

math
208 times 2

math
208 times 2

science
if the distance between crest were 1.5 meters apart, and 2 crest pass the pole each second, what would be the speed of the wave ?

Science
Which distance is the greatest ? A. The distance across the Milky Way Galaxy. B. The distance to the nearest star Cluster. C. The distance across the solar system. D. The distance to the nearest Galaxy.

algebra
for the algebraic function described by the expression x^2+2x-6 and written as the function f(6) = x^2+2x-6, what is the evaluation of f(6)?

8 Grade Math
At the same time that a flagpole casts a 4.5 m shadow , a meter stick casts a 1.5 m shadow. How tall is the flagpole ?

Pre-Calculus
Verify: 1/(1-sintheta) * 1/(1+sintheta) = sec^2theta sec^2theta is the answer, it would be great if someone can do the steps for me. thank you.

math
The tail on Alex 's dog is 5 1/4inches long.This lenght is between which two inch-marks on a ruler?

Chemistry
1) A compound has the following percentages by mass: barium, 58.84%; sulfur, 13.74%; oxygen, 27.43%. Determine the empirical formula of the compound. 2) If a 1.271-g sample of aluminum metal is heated on a chlorine gas atmosphere, the mass of aluminum chloride produced is 6.28...

Physics
Vf2=(m1+m2)(Vo1)/m1 m1=truck; m2=car; Vo1=initial speed of truck. mo1Vo1=mf1Vf1+mf2Vf2; substitute Vf2 to find Vf1

Chemistry
How many grams of NH3 can be produced from 3.26 moles of N2? How many grams of H2 are needed to produce 13.99 g of NH3?

Chemistry
Use a grammatically correct English sentence to describe how the mass in amu of one molecule of a compound is related to the mass in grams of one mole of that compound.

Physics
A girl throws a stone form the top of a building with an initial velocity of 20.0 m/s upward. The building is 50.0 m high and the stone just misses the edge of the roof on its way down. Draw a v vs t graph, find time needed for stone to reach max height, find max height, time ...

Physics
A person pushes on a 62-kg refrigerator with a horizontal force of -256 N; the minus sign indicates that the force points in the −x direction. The coefficient of static friction is 0.61. (a) If the refrigerator does not move, what are the magnitude and direction of the s...

pre-calculus
Could someone please help me with this problem? square root of (2x+1) -5 = 8 I think I take the 5 and add it to the 8 and then I have square root of (2x+1) = 13 then do I square both sides and end up with 2x+1 = 13^2 2x+1=169 2x+1-1=169-1 2x=168 x=84 am I even close on this?

Physics
The elevator has not moved yet, so the normal force and the force of the man's weight are equal. The answer is 431.2 N n - mg = ma n - mg = 0, so n = mg n = 44.0*9.8 n = 431.2

algebra
so yhu just find a common denominator???

algebra
5. If x=8 and y=3, find the value of 4/x - 1/y. well i would substitute 8 for x and 3 for y. then it would be 4/8 - 1/3. 0.5 - 0.33333 would it then be 0.2333? 8. If x=6 and y=5, find the value of x/8 + 2/y. well i would substitute 6 for x and 5 for y. then it would be 6/8 + 2...

Physics
As two trains move along a track, their conductors suddenly notice that they are headed toward each other. The figure below gives their velocities v as functions of time t as the conductors slow the trains. The slowing processes begin when the trains are 240 m apart. What is t...

Physics
actually should I do 2.3 m/s divided by 343 seconds to get .00599 m/s^2?

Physics
From t = 0 to t = 5.00 min, a man stands still, and from t = 5.00 min to t = 10.0 min, he walks briskly in a straight line at a constant speed of 2.3 m/s. (a) What is his average velocity vavg in the interval 2.000 min to 7.90 min? I found this to be 1.15 m/s (b) What is his a...

Calculus
Find the derivative of y with respect to x. y= (lnx)/(3+4lnx) Should I start by using the quotient rule?

Calculus
Find the derivative of y with respect to x. y= [(x^5)/5]lnx-[(x^5)/25] How would I go about doing this? Should I use the product rule to separate (x^5)/5]lnx ?

math
The area of a square with a side length of s is s to the second power. What is the area of a square with a side length of 3 inches?

math
Thank You So Much Sam! :)

math
Use the “difference of squares” rule to factor the following expression 49-4y^2 my answer is going to be (7-2y)(7-2y) I wasnt sure if it could of been (7-2y)(7+2y)

Algebra
Andrew factored the expression 28x^3-42x^2+35x as 7x(4x^2+6x-5). But when Melissa applied the distributive law and multiplied out 7x(4x^2+6x-5) , she got 28x^3+42x^2-35x ; thus, Andrew’s solution does not appear to check. Why is that? Please help Andrew to understand this...

social studies
what was the cause of the boston massacure?

algebra
An online retailer had a sale that lasted 5 days. Approximately how many people visted the site during the sale? Assume that people who visited on more than one day were only counted once. Day 1 20,000 Day 2 25,000 Day 3 30,000 Day 4 25,000 Day 5 20,000

algebra
a celing in a new home rises 8 feet over a distance of 29 feet, Find the slope of this celing. round your answer to two decimals places.

Health
Sara? Which one is someone smoking Cocaine and not Crack Cocaine send me the exact link to only a photo of someone smoking Cocaine.

Health
could u please send me the exact link?

Health
Can someone answer

Health
Ok, I know that Crack Cocaine can be smoked, but can Cocaine be smoked? If so I need a picture of someone smoking Cocaine not Crack Cocaine though and for the picture just copy and paste the link of the direct picture ASAP

McLoughlin
Yes, Oregon territory is correct, and yes that is EXACTLY what happened between McLoughlin and Simpson,

Health
yes can someone please answer my question

Health
Srry I wrote that above wrong I meant to say wht r the effects on the body?

Health
Thanks Sara, so the effects on the so wht r the effects on the body>?

Health
but i need the effects cocaine has on the body in one separate section and then the mind separate and then behavior

Health
Ok wow thanks very much but for that exact question that i asked---- for the effects on the body, mind, and behavior could u please like write wht the effects on the body are and then the effects on the mind and then effects on behavior all separate and organized ASAP please i...

Health
What are the short term effects of Cocaine: When someone consumes this substance what effect will it have on their body, mind, and behavior? Please answer ASAP I really need the answer... and please don't give the website for me to find the info, I don't have enough ti...

Health
what pic do i use?

algebra 1
Write a point-slope equation for the line with the given slope that contains the given points. m= -1;(-3,6)

math
for math homework it is algebra and we have to use a ti-83 plus calculator to convert things, thats the one our teacher told us. but i do not have one. so i was wondering if anybody knew of a website that i could use a free calcutar online?

Spanish
this is why i love being puerto rican lol 30.c 31.a 32.d 33.c 35.c 36.a 37.b 39.b 41.c 42.b

Spanish
this is perfectly right

math
but if she wants to earn 150 and she already has 20 would she subtract 20 from 150? how is it 20+7m<150

math
for this question, if carolwants to earn $150.00 but she already has earned $20.00 would she subtract that or just look for an inequality

math
i do not want an answer i just dont get how to do this problem. i have a packet and i do the ones i get and ask for help with the ones i dont. i just ask for an explanation on how to do the questions that i do not understand.

math
carol wants to earn at least $150.00 for her charity while running in a race. she will earn $20.00 for participating plus $7.00 for each mile she runs. if m represents the number of miles shre runs, which inequality represents the money carol wants to earn?

math
thank you.

math
Katie converts the outside temperature from degrees fahrenheit, f, to degrees celsius, c. She uses the formula below to convert the temperature. (F-32)5/9=c if the outside temperature is 50 degrees fahrenheit, what is the outside temperature in degrees celsius

math
thank you.

math
ok so it would be b+a<2b because b and a added together would be less than b times 2?

math
The cost of one burrito,b,and one taco,a, is less than the cost of two burritos. Which inequality represnts this relationship

math
thank you again

math
90?

math
jordon has $608 in his savings account. He withdraws 15% of the money to pay for school clothes. which is the best estimate for the amount of money jordon withdraws?

math
ok i understand now thank you.

math
i do not understand how to do this. can you please explain.

math
Renee must solve the equation 4x+12=6x. If she subtracts 4x from the left side of the equation, what should renee write on the right side of the equation?

math
what is the product of the expression below? (2x-5)(2x-3)

math
thank you.

math
20/2.80=35/x 20x=35*2.80 20x=98 divided by 20 on both sides x=4.90?

math
a 20-ounce bag of popcorn costs $2.80. if the unit price stays the same, how much does a 35-ounce bag of popcorn cost?

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