Friday

October 24, 2014

October 24, 2014

Total # Posts: 361

**Chemistry**

What happens to the mass of a beaker of water with a teaspoon of sugar in it measured on a balance pan compared to a teaspoon of sugar and a beaker of water separated on a balance pan? does the mass increase, decrease or stay the same? and why?
*January 18, 2011*

**physics**

A uniform ladder of mass m and length L leans at an angle θ against a frictionless wall. If the coefficient of static friction between the ladder and the ground is 0.43, what is the minimum angle at which the ladder will not slip? Do i use the equation Fn- Mg= 0
*January 17, 2011*

**world history**

The choices to this question are rapprochement with France an alliance with the Ottomans to contain Russia a formal alliance with Austria-Hungary successful challenge to Britain's sea supremacy
*January 10, 2011*

**HEAT**

A container holds a quantity of liquid nitrogen at a temperature of -200 degrees C. Explain how each of the following could be used to warm up the nitrogen. a)ice cubes b)hot water bath c)bubbling room air through the liquid All these substances contain a lot amount of thermal...
*December 8, 2010*

**Earth's Heat Resources**

most of earth's landmass is in the northern hemisphere. how might this influence Earth's overall albedo during a)June b)January I really dont get this question.
*December 8, 2010*

**Earth's Heat Resources**

How is the energy that reaches earth's surface returned to space? is is by radiation?
*December 8, 2010*

**Earth's Heat Resources**

list 3 examples of natural activities or events that carry thermal energy from within Earth directly to Earth's surface. I dont get what kinds of activities its referring to.
*December 8, 2010*

**HEAT**

A container holds a quantity of liquid nitrogen at a temperature of -200 degrees C. Explain how each of the following could be used to warm up the nitrogen. a)ice cubes b)hot water bath c)bubbling room air through the liquid All these substances contain a lot amount of thermal...
*December 7, 2010*

**Earth's Heat Sources**

most of earth's landmass is in the northern hemisphere. how might this influence Earth's overall albedo during a)June b)January I really dont get this question.
*December 7, 2010*

**Earth's Heat Resources**

How is the energy that reaches earth's surface returned to space? is is by radiation?
*December 7, 2010*

**Earth's Heat Resources**

list 3 examples of natural activities or events that carry thermal energy from within Earth directly to Earth's surface. I dont get what kinds of activities its referring to.
*December 7, 2010*

**Energy Transfer in Natural Systems**

thanks for the information bobpursley, ill keep all that in mind, thanks a bunch:)
*December 3, 2010*

**Energy Transfer in Natural Systems**

If u reach into a hot oven to remove a pizza, ur arm is not burned by the hot air but would be burned if u touched the pan. Explain. If u reached into a hot oven to remove a pizza, ur arm would not get burned by the hot air, instead it would get burned if u touched the pan ...
*December 3, 2010*

**Energy Transfer in Natural Systems**

thanks:)
*December 3, 2010*

**Energy Transfer in Natural Systems**

A = III B = II C = II D = I
*December 3, 2010*

**Energy Transfer in Natural Systems**

Match each example to a heat mechanism. Terms may be used more than once. EXAMPLES: A. Water is heated on a stove. B. You feel cold near a closed window. C. You feel cool air at your feet when you open the refrigerator. D. A blacksmith dips red-hot steel into a bucket of water...
*December 3, 2010*

**unit conversion**

what is .07g/cm3 in kg/m3?
*November 29, 2010*

**Physics, URGENT!!!**

We consider tobacco virus diffusing along a 0.47 m long tube filled with water. The cross-sectional area of the tube is unknown. The diffusion coefficient is found in Table 10.5, p. 319 in the textbook. A total amount of virus of 2.6 x 10-16 kg is transported in a steady state...
*November 29, 2010*

**Physics**

A bathysphere used for deep sea exploration has a radius of 1.50 m and a mass of 1.20 × 104 kg. In order to dive, the sphere takes on mass in the form of sea water. a) Determine the mass the bathysphere must take on so that it can descend at a constant speed of 1.20 m/s...
*November 21, 2010*

**physics.**

knowing the following: standard vector notation: 46.9 km@ 32 degrees magnitude: 46.9 km theta 58 quadrant 1 x component 24.9 y component 39.7 What would the navigational angle be
*November 14, 2010*

**algebra 2**

(4tt-att-2bt+5)-(cttt+2tt-6t+3)=ttt-2t+d ; i need to find what a,b,c, and d are. the variables like tt's mean t squared just so u know.
*November 9, 2010*

**Physics Urgent!!!!!!**

We consider an ideal gas of molar mass M = 16 g/mol at +10oC. What is the pressure of the gas if its density is 1.16 kg/m3 ?
*November 8, 2010*

**Physics Urgent**

A container of volume V = 103 cm3 has a mass of 30.0042 g when evacuated. When the container is filed with an unknown gas of pressure p = 4.72 atm at temperature T = 20oC, the mass of the system increases to 30.9508 g. Assuming that the unknown gas behaves like an ideal gas, ...
*November 8, 2010*

**Physics Urgent**

A container of volume V = 103 cm3 has a mass of 30.0042 g when evacuated. When the container is filed with an unknown gas of pressure p = 4.72 atm at temperature T = 20oC, the mass of the system increases to 30.9508 g. Assuming that the unknown gas behaves like an ideal gas, ...
*November 8, 2010*

**Chemistry**

If 36.00 mL of KMnO4 are required to oxidize 25.00 mL of 0.02932 M NaC2O4 solution, what is the concentration of KMnO4?
*November 1, 2010*

**physics**

The x component of a certain vector is -86.0 units and the y component is +75.0 units. The magnitude of the vector is 114 m. What is the angle between the direction of the vector and the positive direction of x? Use the convention that positive angles are measured ...
*October 24, 2010*

**MATH**

MAKE A TALL CHARTT FOR THE NUMBER OF STUDENTS IN THE THIRD FOURTH AND FIFTH GRADE CLASSES: 26,25,27,27,26,28,27
*October 19, 2010*

**math 2nd grade**

i am inside the path 7,6,9,3.iam the diffenrce of 2 numbers outside the path 6,7,8,5.what number am i?
*October 17, 2010*

**English 9**

For our assignment we have to choose an advertisement either in a magazine or on TV and describe how it appeals its audience. Are there any ads that would work well here?
*October 12, 2010*

**English 9**

Shannon Smiley. An acute, humourous, admirable, contrasting individual. Her delicate blonde hair flows perfectly down the sides of her duey, pale face that compliments her bold grey eyes. Shannon is an artistic person; she prefers flawed perfection and beauty. "Beauty is ...
*October 12, 2010*

**English 9**

[this is what i have done so far, and i have the situations, i just need help with explaining what i have said already] An artistic beauty. Shannon Smiley. An acute, humourous, admirable, contrasting individual. Her delicate blonde hair flows perfectly down the sides of her ...
*October 12, 2010*

**English 9**

Write a character description. Choose a person you know well, and identify one of his/ her character traits. Then, chose two or three incidents in which that person revealed that trait. - The first sentence nees to be your topic sentence and use a specific noun, verb or adverb...
*October 12, 2010*

**History**

[this is what i have so far. we need 5 paragraphs. in paragraph 4 i want to explain how greece's military modernized and then how greece gained religion/ culture and i don't know where to find this information] Between 800-500 B.C.E Archaic Greece went through changes ...
*October 12, 2010*

**History**

How did Archaic Greece modernize
*October 12, 2010*

**physics**

A ship maneuvers to within 2500m of an island's 1800m high mountain peak and fires a projectile at an enemy ship 610m on the other side of the peak. If the ship shoots the projectile with an initial velocity of 250m/s at an angle of 75 degrees. how close to the enemy ship ...
*October 8, 2010*

**Chemistry 1151**

i have been trying for a few hours now to solve this, but i missed tis day in class and my mind wont wrap around the concept. can someoneplease help?? How many moles of Neon are in a 25mL container at STP?
*October 6, 2010*

**Chemistry 1151**

How many oles of Neon are in a 25mL container at STP?
*October 6, 2010*

**Chemistry 1151**

what is the pressure of a 0.85 Liter sample of Helium with a mass of 0.070 grams when it is at 5 degrees Celcius?
*October 6, 2010*

**9th grade MATH**

14+2y=78 -14 -14 __________ 2y=64 _ _ 2 2 y=32
*September 28, 2010*

**math 115**

This is not right 5/6x-73/6
*September 20, 2010*

**math 115**

I need help please, Find an equation of the line having the given slope containing the give point m=5/6(5,-8) 5/6+ 40/6 is this correct and if not can you explain to me what I am doing wrong please
*September 20, 2010*

**math 115**

Thank you I met 45
*September 17, 2010*

**math 115**

You can use functions to figure how much money you earn in a day..if you work "x" hours in a day and you make $"y" in a day. So let's say that you work 5 hours in a day and you make $9 an hour y=5x+9 9x5=40 would this be the right way of working this ...
*September 17, 2010*

**math 115**

find (-4) when f(x) = 4-2x f(-4)+4-2 f(-4)=-2 Is that correct I am having a hard time with this and I know it so easy my brain is frozen...
*September 16, 2010*

**math/115**

thank you again
*September 16, 2010*

**math/115**

f(x) = 2x - 14 Find f(3) and f(-3). f(3)=2 -14=7 f(3)=2+14 is this correct
*September 16, 2010*

**math 115**

Thank you Rachel I understand much better
*September 16, 2010*

**math 115**

h(x) = 19-x when x is 5 and when x is -5 I need to write and expression so is this the right way? h(x)=19 h(5)x19 h(5)x 19=-5
*September 16, 2010*

**math/116**

How can I determine if two lines are perpendicular?
*September 15, 2010*

**math/116**

How can I determine if two lines are perpendicular?
*September 15, 2010*

**math/116**

How can I determine if two lines are perpendicular?
*September 15, 2010*

**algebra**

a) What year would be represented by x = 2? 2002 x 1 = 2003 so it would be 3x2=6 b) How much did it cost per gallon of gasoline in the year represented by x=2? .99
*September 15, 2010*

**Math/116**

Thank you for your help
*September 15, 2010*

**Math/116**

2. Suppose that the linear equation y = 0.3x + 0.9 represents an estimate of the average cost of gas for year x starting in 2002. The year 2002 would be represented by x = 1, for example, as it is the first year in the study. Similarly, 2008 would be year 7, or x = 7. a) What ...
*September 15, 2010*

**Math/116**

Thank you can you explain to me how you got the 17.5 answer please
*September 15, 2010*

**Math/116**

1. Suppose you are at the gas station filling your tank with gas. The function C(g) represents the cost C of filling up the gas tank with g gallons. Given the equation: C(g) = 3.5 (g) a) Find C(2) 3.5 x 2 = 7 b) Find C(5) 7/5 = 1.4 would this be correct ?
*September 15, 2010*

**Algebra **

f(8)=8
*September 15, 2010*

**Algebra **

They want me to solved this problem tha is what I thought...we are working on linear function does that help any.
*September 15, 2010*

**Algebra **

I have a problem with linear funtion is f(8)=8 f(x) = x + 10=what is x is that always 0 so this answer would 10
*September 15, 2010*

**Alegbra 116 Help Please**

why the line x = 4 is a vertical line. Name three points on the line represented by x=4. Then explain why, when we connect these points, the line goes straight up and down and does not slant to the left or right. Is the three point becasue on a graph we have -4 =4 on a graph ...
*September 9, 2010*

**Algebra **

Thank you making me understand that better
*September 8, 2010*

**Algebra **

I am having a hard time with this problem 3. You are going to plant trees in your hilly backyard. Tree A is located at coordinates (1,2) and Tree B is located at (3,12). What is the slope of the hill between the two trees? Show how you arrived at your answer
*September 8, 2010*

**Alegbra 116**

I am having problem with this one you are going to help a neighbor build a ramp so he can easily go into his house in a wheel chair In order to meet federal guideline the ramp must not rise mor than 1 foot over a horizontal distane of 12 so would my answer be y x 12 - 1
*September 8, 2010*

**math 116 Help Please**

1. Suppose you are at the gas station filling your tank with gas. The function C(g) represents the cost C of filling up the gas tank with g gallons. Given the equation: C(g) = 3.5 (g) a) Find C(2) (2 pts.) b) Find C(5) (2 pts.) 2. Suppose that the linear equation y = 0.3x + 0....
*September 8, 2010*

**Alegbra 116 Help Please**

Buying a Home For most people, buying a house is a great investment that can offer security in an uncertain world, but buying a house is also a commitment. Application Practice After putting your name on this document, above, answer the following questions. SHOW YOUR WORK FOR ...
*September 8, 2010*

**Alegbra 116 Help Please**

1) Your are planning to spend no less than $8000.00 and no more than $12,000 on your landscape project a) Write an inequality that demonstrates how much money you will be will to spend on the project B) Suppose you want to cover the backyard with the decorative rock and plant ...
*September 8, 2010*

**Alegbra 116**

1) Your are planning to spend no less than $8000.00 and no more than $12,000 on your landscape project a) Write an inequality that demonstrates how much money you will be will to spend on the project 8000< + x < 12,000 B) Suppose you want to cover the backyard with the ...
*September 7, 2010*

**Alegbra 116 Help Please**

1) Your are planning to spend no less than $8000.00 and no more than $12,000 on your landscape project a) Write an inequality that demonstrates how much money you will be will to spend on the project B) Suppose you want to cover the backyard with the decorative rock and plant ...
*September 7, 2010*

**Alegbra 116**

I guess no one wants to help me and my friend sydney....
*September 7, 2010*

**Alegbra 116**

1) Your are planning to spend no less than $8000.00 and no more than $12,000 on your landscape project a) Write an inequality that demonstrates how much money you will be will to spend on the project B) Suppose you want to cover the backyard with the decorative rock and plant ...
*September 7, 2010*

**math 116 Help Please**

1) Your are planning to spend no less than $8000.00 and no more than $12,000 on your landscape project a) Write an inequality that demonstrates how much money you will be will to spend on the project B) Suppose you want to cover the backyard with the decorative rock and plant ...
*September 7, 2010*

**math 115**

Thank you
*September 7, 2010*

**Math 116**

So would this be the right answer? $8000< x < $12,000
*September 7, 2010*

**Math 116**

Thank you Ms.Sue..
*September 7, 2010*

**math**

how do you find the domain of f if f(x)= (2x-3)/(4x+5) Thank you
*August 23, 2010*

**Math**

how do you solve 5z-43=2z+80
*June 2, 2010*

**2nd grade**

there are 16 children in room a. there are 11 children in room b. can they make 2 equal teams? How many children would be on each team?
*April 20, 2010*

**math**

double my tens digit to get my ones digit. double me and i am less than 50? who am i
*March 31, 2010*

**11th grade**

7662.3223 moles C
*March 12, 2010*

**`Math**

Can someone show me an example of area of compound figure? and how to solve
*March 3, 2010*

**5th grade**

How do you figure out area of compound figure
*March 3, 2010*

**CHEMISTRY!!**

A student determined the calorimeter constant of the calorimeter. The student added 50.00 mL of cold water to 50.00 mK of heated , distilled water in a styrofoam cup. The initial temp of the cold water was 21,00C and the hot water, 29.15C. The maximum temp pf the mixture was ...
*March 3, 2010*

**spanish**

what does los dias de clase mean
*March 2, 2010*

**math**

how do you find the slope
*February 19, 2010*

**Physics**

The general relationship of oscillation T of a mass m suspended on a spring is T=2(pie)square root of m/k, where k is the spring constant. how would i change this equation into a straight line equation to graph?
*January 25, 2010*

**Science**

Of COURSE it is! I'm in 6th grade too and that sounds great. Don't worry about it ^_^ Just do it and forget what other people think. All you have to do is make it accurate and well done. Your teacher won't judge you for childness. Just the quality of your work.
*November 16, 2009*

**10th grade algebra **

4.3
*November 12, 2009*

**10th grade algebra**

4.3
*November 12, 2009*

**Math**

solve x^2 = 2^x
*September 20, 2009*

**Math**

please help me x^3-3x-3=0 thanks
*September 20, 2009*

**math**

tn = a1 + (n-1)d t2 = 12 and t3 = 24 so d= 24-13=11 so we need to find a1 t2=a1 + (n-1)d 12 = a1 + (2-1)11 12 = a1 +11 1 = a1 then t15 = 1 + (15-1)11 t15 = 1 + 154 t15 = 155
*September 20, 2009*

**math - probability**

where did you get the 8/7/6 from 3 warehouse * 8 outlets = 24ways
*September 20, 2009*

**math**

i) 105 = 5A + 3B 63 = 4A + 1B ii)you solve this system equation by either by substitution or elimination cheers
*September 20, 2009*

**Pre-Algebra**

what is 8, 9, and 11?
*September 15, 2009*

**math**

What is three eighths of 32 pieces? And how do i write out the problem to find the answer?
*September 2, 2009*

**college algebra**

The interest rate is 8%.
*August 8, 2009*

**college algebra**

I am dealing with Interest Compounded Continuosly. I am looking for the balance after 10 years. The book shows that P(10) = 2oooe^0.08(10) = 2000e^0.8 = $4451.08 My questions is how do you calculate 2000e^o.8 and end up with 4451.08?
*August 8, 2009*

**math**

Thank you very much, you have been a great help!!!
*July 26, 2009*

**math**

Solve X + 1/x – 2 ≥ 3 I know you have to subtract the 3 from both sides to get the zero on right of the inequality sign. I don't understand how to make one fraction after I do this.
*July 26, 2009*

**College Algebra**

I'm working on vertical asymptotes when factoring 6x^2 - 6 (denominator). I came up with 6(x^2-1). Then I was trying to find the zeros of the denominator but 6 does not = 0 and x^2-1=0 then I got x^2=1 and x = plus or minus sqrt 1. Can you tell me what I am doing wrong?
*July 25, 2009*

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