Wednesday

July 23, 2014

July 23, 2014

Total # Posts: 507

**Physics**

how much does a 2 lietr bottle of soda pop weigh in pounds? assume that the pop has the density ofg water,namely 1 kg\lietr and that the weight of the bottle itself is negligible?

**Chem**

A mixture is prepared by adding 28.6 mL of 0.169 M Na3PO4 to 39.7 mL of 0.255 M Ca(NO3)2. What mass of Ca3(PO4)2 will be formed?

**Chem**

How many grams of water could have its temperature raised from 25 ºC (room temperature) to 100 ºC (the boiling point of water) by the amount of energy released in the formation of 4.0 mol of H2 from hydrogen atoms? The bond energy of H2 is 435 kJ/mol. The specific he...

**physics, science**

What effect does friction have upon a) ball bounce angle, and b) ‘speed’ of the court? Refer to clay and grass courts to help illustrate your answer. (4 marks) please help!

**physics**

If a particle has kinetic energy K = 60 MeV when its momentum magnitude p = 100 MeV/c, what is the ratio m/me of its mass to the electron mass?

**chemistry**

thanks it helped

**chemistry**

please help! how do i find the molecular mass of C3H5O2 molecular mass of 292 g.

**Computer science**

Take two inputs from user: N - #items B - budget. There are S items, each with some price value, out of which user needs to select N items in such a way that total bill does not exceed B. The program should print all such combination of N products.

**Chemistry**

What is the final Celsius temperature if 4.42 L of nitric oxide gas at 35°C is cooled until the volume reaches 1.00 L? Assume the pressure remains constant.

**Math**

Sierra spent 2/3 of her earnings on clothes and 1/5 on school supplies. She saved the rest. What fraction of her earnings did she save?

**Social Studies**

so what is the answer

**Math**

Can you please help with the following: x^2+2x-35=0 I can't remember how to get the different possibilities. Appreciate help, thanks

**Math**

A dog ate 48 bones. The other dog ate 47 bones. How much bones did both dogs eat?

**Physics**

Can you please help with the following: x^2+2x-35=0 I can't remember how to get the different possibilities. Appreciate help, thanks

**Art**

what 2 colors make purple?

**algebra**

12$

**Calculus 1**

On the graph of f(x) = 8*sin(3pi*x), points P and Q are at consecutive lowest and highest points with P occurring before Q. Find the slope of the line which passes through P and Q. Slope = ? I have tried 48/pi and it didn't work

**science(CHECK ANSWERS)**

how do you know they are right?

**Math**

Yes but I do not know how to solve your way of the equation.

**Math**

I also got 1 and 0 but I do not know.

**Math**

So would the answer be 31?

**Math**

How can I put that in an equation? would it be n+n+2+n+3=93?

**Math**

What does it mean by, "The sum of three consecutive odd integers is 93."

**science(please check answers)**

Hay Matt, number 2 is wrong it's d

**science plz help right now!!!!**

they are all right Elena. Good Job!

**science plz help right now!!!!**

1.B 2.D 3.C 4.D 5.C 6.B 7.D 8.B

**calculus**

lim t-> -infinity for sqrt(4t^2-5t-1)/(2t-3) I get infinity or -infinity, but the real answer is -1. How does this occur?

**calculus**

oops double posted

**calculus**

The question is: tan(arcsinx)= I know that inverse of sin is 1/sqrt(1-x^2) however this question still confuses me. The outcome is x/sqrt(1-x^2), how did the tan create the additional x ?

**calculus**

I am still confused. hm.

**calculus**

f(x) = ln(ln(lnx)) has the domain of (e, infinity). I am not sure how this occurs however. I know in the case of ln x, x must be greater than 0. However where does e come from. e is the base of log in the case of ln, but something is just not clicking for me.

**calculus**

so basically what i said in the original question is irrelevant.

**calculus**

oops i think i meant to say that the derivative is 1/sqrt(1-x^2) dang I am tired.

**calculus**

The question is: tan(arcsinx)= I know that inverse of sin is 1/sqrt(1-x^2) however this question still confuses me. The outcome is x/sqrt(1-x^2), how did the tan create the additional x ?

**Calculus**

Perfect, thanks.

**Calculus**

I need step-by-step help for solving the lim x -> 0 for the function sin(x)/(x + tan(x)) I can do simpler ones, but this one throws me off. Thanks.

**chemistry**

A mixture was formed by adding 4.56g of KCL to water to make 175mL of solution. The density if the solution is 1.12g/mL. Whatis the mass percent and what is the molarity of the potassium chloride solution?

**math**

Translate the following statement into a numerical expression: 3 times the quantity of H less 233.

**College Physics**

1. In a region of two-dimensional space, there are three fixed charges: +1 mC at (0, 0), −2 mC at (18 mm, -3 mm), and +3 mC at (-8 mm, 12 mm). What is the net force on the −2-mC charge? Find the magnitude and direction (counterclockwise from the x-axis).

**Math**

Is 25x squared + 40x +15 a perfect square? And how do you factor it if it is?

**Math**

Using your answer to the question above, what is the net dollar amount of that rose order?

**Religion**

The days of Triduum are measured from _ _ _ _ _ _ to _ _ _ _ _ _.

**7th Grade Language Arts!**

All of them are write bob. Good Job!

**Physics**

A brick is thrown off a building at a 25 degree angle at 10m/s, it lands 40 meters away, How high is the building?

**chemistry**

85.0 of is initially at room temperature (22.0). A chilled steel rod at 2.0 is placed in the water. If the final temperature of the system is 21.2, what is the mass of the steel bar? Specific heat of water = 4.18 Specific heat of steel = 0.452 My answer was 32.752. I rounded i...

**chemistry**

85.0 of is initially at room temperature (22.0). A chilled steel rod at 2.0 is placed in the water. If the final temperature of the system is 21.2, what is the mass of the steel bar? Specific heat of water = 4.18 Specific heat of steel = 0.452 My answer was 32.752. I rounded i...

**math**

lol

**math**

Is there a way to prove this in upwards of 5 steps? Apparently there is?? Prove. 2^n + 2^n = 2^(n+1) I posted this before however apparently I need something more indepth in terms of the # of steps.

**math**

ok thanks

**math**

Alrighty, are there particular times you guys are most active?

**math**

Alrighty, are there particular times you guys are most active?

**math**

Is it possible to set up a time to do a live chat with a tutor here? like for 15-20 min or so. I have a few questions, nothing major but would like to have answers explained to me/ any additional questions I have. Would be cool, i understand it is asking for alot.

**Chemistry**

A 100.0 g sample of water at 27.0°C is poured into a 77.4 g sample of water at 89.0°C. What will be the final temperature of the water?

**Algebra**

447

**calculus**

12

**math **

If i have a piece of pipe that is half a yard long and it's divided into 5 pieces what is the length of each piece in yards?

**home economics**

mention the types of disposal of fullness?

**Math 8 -HELP! (PLZ!)**

1. Write the fraction two-fourths as a percent. Round to the nearest hundredth of a percent where necessary. (1 point) 50% 20% 54% 48% 2. Write the decimal 0.041 as a percent. (1 point) 41% 4.1% 410% 0.41% 3. In the small country of Varia, a bill becomes law only if thirty-fou...

**science**

What can engineers do to help buildings survive in an earthquake?

**Grammar**

No the correct answer is My parents and I are jumping.

**Grammar**

That is wrong it should be My parents and I.

**Science**

7/10 Thank you so much.

**Science**

1/4 is that right

**Science**

YEs but i am confused what would the answer be?

**Science**

no thats what i need help with!

**Science**

WHat would the fraction be Miss SUe

**Science**

Name a dormant volcano?

**Science**

WHat fraction of the earth is covered in water? Forgot my science book HELp

**Science math**

Thank you both very much.

**Science math**

Suppose a laboratory has a 38 g sample of polonium-210. The half-life of polonium-210 is about 138 days. How many half-lives of polonium-210 occur in 1104 days? How much polonium is in the sample 1104 days later?

**math**

The table below shows the rates for parking a car in a parking lot. According to the pattern shown in the table, how much would it cost to leave a car in the lot for 2 full days? ~TABLE~ 1 hour: $1.00 2 hours: $1.75 3 hours: $2.50 4 hours: $3.25 A. $36.00 B. $36.25 C. $36.50 D...

**mathematics**

1. If $ is defined for all positive numbers x and y by x$y = 3x + 8y - y^3, then 10$2 = A. 38 B. 102 C. 14 D. 20 2. If & is defined for all positive numbers w and z by w & z = 15wz - 10w + 2 then 3 & 4 = A. 67 B. 77 C. 142 D. 152 3. All of the following are in the domain of f(...

**science**

help on the moon

**science**

u have 2 make a cool rhyme.if u like rap then rap it.Trust me i learned that in 6th grade.Its really easy.

**math**

50

**math**

A student completed 44% on a test. He completed 22 question. Then how many questions are on the test

**Genetics 7th**

female is dominant

**3rd grade language**

circle when the word means your doing something ex:running/action/verb.

**3rd grade language**

circle when the word means your doing something ex:running/action/verb.

**Pysics**

A wooden bucket ﬁlled with water has a mass of 59 kg and is attached to a rope that is wound around a cylinder with a radius of 0.071 m. A crank with a turning radius of 0.29 m is attached to the end of the cylinder. What minimum force directed perpendicularly to the cr...

**Pysics**

A mother and daughter are on a seesaw in the park. How far from the center must the 127 lb mother sit in order to balance the 49 lb daughter sitting 7 ft from the center?

**Math**

The difference between my digits is 7. When you divide me by the sum of my digits, the quotient is the sum of my digits. That makes me a perfect you know what! Which number am I?

**Math**

When you add the number of rows in my array to the number in each row, you get 15. My digits add up to 9. Which number am I?

**Math**

One of my factors is 5 more than another of my factors. My digits add up to 6. I am less than 50. Which number am I?

**Math**

If you count backward from me to divide me by 8, the sixth number you reach is 48. Which number am I?

**Math**

I am a perfect square that is 11 more than a perfect square and 13 less than a perfect square. Which number am I?

**Math**

I am divisible by four factors in addition to 1 and myself. I am 7 less than a number with a square array. I am less than 24. Which number am I?

**Calculus**

Consider a manufacturer whose total cost of producing x items is given by c(x)=10000+5x+1/9x^2. a. What is the average cost function A(x)= c(x)/x? b. How many items should the manufacturer produce in order to minimize average cost? c. What is the smallest average cost? d. Find...

**Nutrition**

What is the portion size of a #8 scoop?

**physics**

A tank of height H is filled with water and sits on the ground. Water squirts from a hole at a height y above the ground and has a range R. For two y values, 0 and H, R is zero. Determine the value of y for which the range will be a maximum. (Use any variable or symbol stated ...

**Physics**

What is the frequency of a sound wave in air at 20°C that has a wavelength of 0.4 m?

**Physics**

A 40,000 kg railroad car initially traveling at 10 m/s collides inelastically with a 20,000 kg railroad car intially at rest. The cars stick together. What is their final speed?

**Physics**

A 40,000 kg railroad car initially traveling at 10 m/s collides inelastically with a 20,000 kg railroad car intially at rest. The cars stick together. What is their final speed?

**Physics**

A 40,000 kg railroad car initially traveling at 10 m/s collides inelastically with a 20,000 kg railroad car intially at rest. The cars stick together. What is their final speed?

**Physics**

A crate with a mass of 40 kg is being dragged along a horizontal floor at a constant velocity by an applied force of 180 N. What is the coefficient of kinetic friction? (g = 10 m/s2

**English/Literature**

I have to write an essay, but I just need help with coming up with some ideas. In the essay, I have to compare/contrast the plays "Ajax" OR "Electra" (both are by Sophocles) with the "Iliad" (by Homer). I CANNOT mention similarities/differences in...

**Math(Algebra)**

If an arrow was shot at such an angle that for every second of travel a lateral change of 50 feet away from the archer was gained, how far away does the arrow land from cliff base?

**Math(Algebra)**

Thanks Steve

**Math(Algebra)**

An arrow is shot vertically upward from the top of a cliff 80 feet tall, with an initial velocity of 64 ft/s, (the acceleration due to gravity is -16ft/sec). a. Write the quadratic equation representing this scenario when h is 0. b. Find the roots (solutions) for this quadrati...

**history**

C. Fifteenth Amendment

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