Thursday

May 28, 2015

May 28, 2015

Total # Posts: 81,839

**physics**

A technician makes a 5.0 kg metal object containing two parts£¬one of iron and the other of aluminum.If it takes 504kj to change the objects temperature from 25 celcius to 165celcius£¬what is the mass of each part£¿
*April 18, 2015*

**physics**

Tony£¬a 110kg football player£¬has a fever of 39celcius. What mass of water must evaporate from his body to cool him to 37celcius£¿
*April 18, 2015*

**Physics**

A stone is dropped from the peak of a hill. It covers a distance of 45 meters in ther last two seconds of its motion. Find the height of the peak?
*April 18, 2015*

**ENGLISH**

Why we have to slaughter
*April 18, 2015*

**chemistry**

25 ml of 3M hno3 are mixed with 75ml of 4.0M HNO3 if volumes are additive then find molarity
*April 18, 2015*

**s.s**

Thank you!
*April 18, 2015*

**s.s**

My friends asking. who was JFK killed by and was Lincoln a republican or democratic
*April 18, 2015*

**troduction to computer**

you call the help desk to report a problem you are having on your computer. The technician asks you what operating system you are running . you know it is windows 7 but you forget which version. how can you find out
*April 17, 2015*

**math**

Kerry states laps around the playground. The playground is 150 meters and 50 meters wide. How many laps will it take Kerry to state 1 km?
*April 17, 2015*

**math **

Kerry states laps around the playground. The playground is 150 m long and 50 m wide. How many laps will it take Kerry to skate 1 km?
*April 17, 2015*

**law**

do you think traffic stops based solely on racial profiling are constitutionally valid?
*April 17, 2015*

**Math**

If a = b + 2*
*April 17, 2015*

**Math**

If a = b + 2l then (b - a)^4 = ? F. -16 G. -8 H. 1 J. 8 K. 16
*April 17, 2015*

**chemistry**

If 0.605 g of magnesium hydroxide reacts with 0.900g of sulfuric acid, what is the mass of magnesium sulfate produced? Mg(OH)2(s)+H2SO4(l)→MgSO4(s)+H2O(l)
*April 17, 2015*

**Math 222**

How do I write the answer in fraction form.
*April 17, 2015*

**calc**

Suppose that an accelerating car goes from 0 mph to 58.6 mph in five seconds. Its velocity is given in the following table, converted from miles per hour to feet per second, so that all time measurements are in seconds. (Note: 1 mph is 22/15 feet per sec = 12/15 ft/s.) Find ...
*April 17, 2015*

**Social studies**

I just read it and I think it's b
*April 17, 2015*

**Social studies**

how was south carolina constitution of 1868 different from earlier versions? A. Representation was based on wealth and population B. Property owners alone could vote C. All men were given the right to vote D. Women were given the right to vote Is it A:)
*April 17, 2015*

**Physics**

Proove a*sin(x)+b*sin(x+phi)=((a+b)^2*cos(phi)^1/2*sin(x+phi/2)
*April 17, 2015*

**mathematics**

Given triangle DEF with vertices D(-3;6) ,E(-2;-3) and F(x;1) with DE=DF, determine the value of x
*April 17, 2015*

**science**

A rectangular barge floats in freshwater. When a 400 kg block is loaded on the 5 m long by 2 m wide barge, the barge sinks a few centimeters deeper. How much deeper does the barge lower?
*April 16, 2015*

**physics class**

Suppose that you balance a 5 kg ball on the tip of your finger that has an area of 1 cm2. What is the pressure on your finger?
*April 16, 2015*

**Calculus check and help**

Let R be the region bounded by the curves y=lnx^2 and y=x^2-4 to the right of the y-axis. A. Find the area of R. B. Find the folume geneated when R is rotated about the line y=-4. C. Write, but do not evaluate the integral expression that gives the volume of the solid ...
*April 16, 2015*

**Calculus check**

The functions f and g are given by f(x)=sqrt(x^3) and g(x)=16-2x. Let R be the region bounded by the x-axis and the graphs of f and g. A. Find the area of R. B. The region R from x=0 to x=4 is rotated about the line x=4. Write, but do not evaluate, an integral expression the ...
*April 16, 2015*

**math**

The surface area of a rectangular prism is 729 square meters. What is the surface area of a similar prism that has edge lengths that are larger by a scale factor of 3
*April 16, 2015*

**Interaction of Forces**

The ball in the image below is rolling toward the block. The ball will create a disturbance in the stability of the block by knocking it over. Which of the following correctly predicts what will happen to the block? [image of ball rolling toward tall, skinny block] - Unstable ...
*April 16, 2015*

**exponential equations**

Jen made an initial investment of $1000 into a T-Bill account. After 2 years, her investment totaled $1 175. Calculate the rate of appreciation, r, of the investment. Give answer to 2 decimal places. 1.175 ------ = 1 1000 - -1 2
*April 16, 2015*

**Social studies**

9 is a
*April 16, 2015*

**Social studies**

9 is a
*April 16, 2015*

**chemistry**

When 2.85 g of HC7H5O2 (molar mass = 122.12 g/mol) was burned in a bomb calorimeter, the temperature of the calorimeter changed from 24.05 ºC to 29.19 ºC. What is the heat capacity of the calorimeter in units of kJ/ºC?
*April 16, 2015*

**math**

hamid has 2 qt container of grape juice tell two ways that hamid can divide the grape juice into 5 containers
*April 16, 2015*

**calculus word prob**

Two buildings at opposite corners of a parking lot need to be connected by cable that will be buried under ground. It costs $11/ft to lay accross parking lot and $8/ft to lay along the sides. The lot is 300ft by 360 ft rect from pt A to the opposite corner with indents of 60ft...
*April 16, 2015*

**math word problems**

Q. Marissa had a doctors appointment last Friday. the bill for her visit came to $345. Her family's health insurance will pay 80% of the bill. What is the dollar figure that Marissa's family will have to pay?? - A. Do I divide...?
*April 16, 2015*

**calc**

The department of transportation has proposed a new 7-mile stretch of highway. The elevation of the highway x miles along the path is given by E(x)=.004 (x^4-8x^3)+2. Where is the steepest point
*April 16, 2015*

**Science**

5 i think is A
*April 16, 2015*

**Science**

4 is frequency
*April 16, 2015*

**Science**

I'm pretty sure 3 is right
*April 16, 2015*

**Science**

2 is right.
*April 16, 2015*

**Science**

number 1 is wrong its C
*April 16, 2015*

**Science**

What was your score?
*April 16, 2015*

**chemistry**

In a titration, 4.1 g of an acid (HX) requires 32.8 mL of 0.74 M NaOH(aq) for complete reaction. What is the molar mass of the acid? Answer in units of g/mol.
*April 16, 2015*

**calculus**

Set up, but do not evaluate, the integral which gives the volume when the region bounded by the curves y = Ln(x), y = 1, and x = 1 is revolved around the line y = −3.
*April 16, 2015*

**calculus**

The base of a solid in the xy-plane is the first-quadrant region bounded y = x and y = x2. Cross sections of the solid perpendicular to the x-axis are equilateral triangles. What is the volume, in cubic units, of the solid?
*April 16, 2015*

**calculus**

Determine if the Mean Value Theorem for Integrals applies to the function f(x) = x^3 − 9x on the interval [−1, 1]. If so, find the x-coordinates of the point(s) guaranteed to exist by the theorem
*April 16, 2015*

**calculus**

An object has a constant acceleration of 40 ft/sec^2, an initial velocity of −20 ft/sec, and an initial position of 10 ft. Find the position function, s(t), describing the motion of the object.
*April 16, 2015*

**Art Please Help :)**

I was right on 1 but 2 actually was A. Should of went with my gut feeling... I had a feeling it was ingenuity. :(
*April 16, 2015*

**Art Please Help :)**

Writeacher thank you so much as well! The thing is with certain courses, whatever they give you in the lesson is what they expect to see on the exam, and do not always put into account other possibilities. My lesson only spoke of asymmetry, and although I may not agree, I must...
*April 16, 2015*

**Art Please Help :)**

Reed thank you soo much, you always go above and beyond in helping me, I super appreciate it!!! :)
*April 16, 2015*

**@Ms. Sue**

Ms. Sue can you please check whenever possible? Thank you :)
*April 16, 2015*

**@Reed :)**

Reed can you please check whenever possible? Thank you so much :-)
*April 16, 2015*

**Art Please Help :)**

So 2 is C?? Or could it be A??
*April 16, 2015*

**Art Please Help :)**

I put asymmetry for 1 because its defined as the lack of equality and balance :) It is also prominent in Japanese gardens ;)
*April 16, 2015*

**Art Please Help :)**

The placements of rocks in a Japanese garden is an example of which artistic principal that communicates the cultural value of embracing a lack of equality? A. Asymmetry*** B. Balance C. Symmetry D. Transformation Which artist-inventor trait is responsible for the ability to ...
*April 16, 2015*

**art**

How do landscape paintings convey the values and ideas of Chinese culture? (1 point) Landscape paintings show chaotic, unhappy culture. Landscape paintings reveal the importance of natural history to the Chinese. Landscape paintings show that Chinese desire to live in simple ...
*April 16, 2015*

**Biology**

If gametes have only one copy of a chromosome, then do egg cells have only an X chromosome?
*April 16, 2015*

**physics**

A spaceship has a momentum of 20,000 kg·m/s to the left; its mass is 500 kg. What is the magnitude of its velocity?
*April 16, 2015*

**MATH**

Suppose that you work at the Peacock Blue store for 40 hours over five days at a rate of $9.25/hour. You then quit your job. Deductions are FICA (7.65%), federal withholding (12%), and state withholding (8%). Your expenses are transportation at $5.25/day, lunch at $3.85/day, ...
*April 16, 2015*

**L.A**

thats the hard part... idk what he compares
*April 16, 2015*

**L.A**

a comparison
*April 16, 2015*

**L.A**

Idk that why i posted a question on here...
*April 16, 2015*

**L.A**

O Captain! my Captain! our fearful trip is done, The ship has weather’d every rack, the prize we sought is won, The port is near, the bells I hear, the people all exulting, While follow eyes the steady keel, the vessel grim and daring; But O heart! heart! heart! O the ...
*April 16, 2015*

**calc**

a) Estimate the area under the graph of f(x) = 10(sqrt(x)) from x = 0 to x = 4 using four approximating rectangles and right endpoints
*April 16, 2015*

**physics**

. A tennis player serves the ball at a height of h with an initial velocity of 40m/s at an angle of 4 0 with the horizontal. Knowing that the ball clears the 0.941m net by 152mm. Determine (a) the height h (b) the distance d from the net to where the ball will land.
*April 16, 2015*

**physics**

A helicopter is flying with a constant horizontal velocity of 144.2 kmph and is directly above the point A when a loose part begins to fall. The part lands 6.5seconds later at point B on an inclined surface. Determine (a) The distance 'd' between points A and B. (b) ...
*April 16, 2015*

**physics**

A ski jumper starts with a horizontal take-off velocity of 25m/s and lands on a straight landing hill inclined at 30 0 . Determine (a) the time between take-off and landin. (b) The length 'd' of the jump. (c) The maximum vertical distance between the jumper and the ...
*April 16, 2015*

**math plz help Irving**

These are actually one of my favorite things to do. Very easy once you get it Your welcome!!
*April 16, 2015*

**math plz help Irving**

I know :) I was just trying o explain to, Pink. So she can understand it.
*April 16, 2015*

**math plz help Irving**

Irving is correct.
*April 16, 2015*

**math plz help Irving**

Sorry, I actually should explained instead of given what the answer could be. Combination is when the order DOESN'T matter. Permutation is when the order DOES matter Does the order matter on this?
*April 16, 2015*

**math plz help Irving**

If this is Permutations then the answer is D If this Combinations then the answer is A
*April 16, 2015*

**English 4**

Oh, compare and contrast? For your essay. You can reread the stores (if their short stories) or just go back through the stories.. How are Psalm 23 and The Sermon on the Mount different? How are they similar or alike. Ex: how are these two sentences different and alike? "...
*April 16, 2015*

**English 4**

Are those two different stories or poems? Do you have answer choices?
*April 16, 2015*

**Jiskha**

This isn't a question but I just want to thank everyone who helps others out on here. It's great that you don't answer some people if they don't give their answer. People are here for help, not to cheat. And you helpers actually help them work it out or you ...
*April 16, 2015*

**Math**

Prove that 140 * 141 * 142 * ... * 159 * 160 is divisible by 4321.
*April 15, 2015*

**Math**

Proportions
*April 15, 2015*

**math**

Consider the distribution of mathematics SAT scores of students in honors calculus at a liberal arts college. What would you expect the shape and variation of the distribution to be? A. Symmetric with little variation B. Symmetric with large variation C. Skewed right with ...
*April 15, 2015*

**geometry**

The cargo space of the truck is 2.44 meters wide, 2.76 meters high, and 8.20 meters long. How many cubic meters of cargo space does the truck have?
*April 15, 2015*

**math word problems**

Q. Mark's doctor appointment was 35 minutes after Tyson 's appointment, Tyson appointment was 20 minutes after Timothy's appointment. Timothy arrived 8 minutes before his appointment but 17 minutes after Raul's appointment which started at 9:30 am. At what time...
*April 15, 2015*

**SCIENTIFIC NOTATION**

Japan and Fiji are both island countries. The population of Japan is approximately 1.3*10^8. The population of Fiji is approximately 8.8*10^5. Which is the best estimate of how many times as great the population of Japan is as Fiji? A about 1.5 times as great B about 15 times ...
*April 15, 2015*

**SCIENTIFIC NOTATION**

NEVERMIND GOT IT
*April 15, 2015*

**SCIENTIFIC NOTATION**

What is the product? (5*10^-7)*(3.2*10^12) A 1.6*10^-84 B 1.6^*10^-5 C 1.6*10^5 D 1.6*10^6 I thought it would be 16.0*10^5 but after moving the decimal one place to the left I thought it would be 1.6*10^4 but it isn't an option
*April 15, 2015*

**Algebraic expression **

One more than the product of 7 and Mabel's height
*April 15, 2015*

**DIAMETER**

NEVERMIND
*April 15, 2015*

**DIAMETER**

What is the approximate volume of this sphere, which has a diameter of 18 inches? A 339 cubic inches B 1,356 cubic inches C 3,052 cubic inches D 24,417 cubic inches PLZ EXPLAIN THE PROCESS
*April 15, 2015*

**EQUATIONS**

nvm Rein Rein
*April 15, 2015*

**EQUATIONS**

Which equations represent a linear function? Equation 1 y=5x-2 Equation 2 y=-1/3x Equation 3 y=x^2-3 Equation 4 y=1 A 1 and 2 B 2 and 3 C 1, 2 and 3 D 1,3, and 4
*April 15, 2015*

**SCIENTIFIC NOTATION**

what?
*April 15, 2015*

**SCIENTIFIC NOTATION**

What is the product? (5*10^-7)*(3.2*10^12) A 1.6*10^-84 B 1.6*10^-5 C 1.6*10^5 D 1.6*10^6
*April 15, 2015*

**EQUATION**

I was having trouble with the equation none of them fit when I solved them
*April 15, 2015*

**EQUATION **

What value of x makes the equation below true? 1/2(6x-6)+1=3(4x-1) A x=-9 B x=-1/9 C x=1/9 D x=9
*April 15, 2015*

**find the height**

um they aren"t exact bc of the radicals thank you very much -_-
*April 15, 2015*

**find the height**

A paper cone cup beside a water cooler has a diameter of 6 centimeters and a slant length of 9 centimeters. What is the approximate height,h, of the cup? A 3 radical 5 centimeters B 6 radical 2 centimeters C 3 radical 10 centimeters D 7 radical 2 centimeters
*April 15, 2015*

**Scientific Notation **

Which is equivalent to 3^3/3^-1? A -81 B -1/81 C 1/81 D 81
*April 15, 2015*

**Linear Functions!!!!**

Which equations represent a linear function? Equation 1 y=5x-2 Equation 2 y=-1/3x Equation 3 y=x^2-3 Equation 4 y=1
*April 15, 2015*

**REPEATING DECIMALS**

which rational number is equivalent to: _ 1.16? A 7/6 B 15/13 C 17/16 D 29/25
*April 15, 2015*

**chemistry**

whoops I took 15% of the molar mass of NH4NO3 So .15 x 25=3.75 3.75 x 300= 1125 ?
*April 15, 2015*

**chemistry**

25.0 ml of 15% NH4NO3 solution is diluted to 300.0 ml. What is the concentration of the diluted solution? My Work: Total molar mass of NH4CO3 = 80.052 .15 x 80.052= 12.0078 25.0 ml (12.00 M) = 300.0 ml (c2) 300.19/300.0ml = The concentration is = 1.0M
*April 15, 2015*

**L.o**

knkmnk
*April 15, 2015*

**L.o**

life adaptation skill
*April 15, 2015*

**Science**

You are trying to determine how far it is to your new friends house. You find out that you actually live on the same street. You also use the same bus stop. Google maps says that your house is 24 meters south of the shared bus stop. Your friend said that he measure his ...
*April 15, 2015*