# Posts by ANON

Total # Posts: 2,824

**chemistry**

When 1367 J of heat energy is added to 44.1 g of hexane, C6H14, the temperature increases by 13.7 °C. Calculate the molar heat capacity of C6H14.

**chemistry**

An 80.0-gram sample of a gas was heated from 25 °C to 225 °C. During this process, 346 J of work was done by the system and its internal energy increased by 8305 J. What is the specific heat of the gas?

**chemistry**

If you combine 360.0 mL of water at 25.00 °C and 120.0 mL of water at 95.00 °C, what is the final temperature of the mixture? Use 1.00 g/mL as the density of water.

**Social Studies**

Mongoose is right

**Chemistry**

Draw the product(s) of the following reaction CH3-CH2-C(triple bond)C-CH2 ---------> ? (Na/NH3)

**Calc**

Use spherical coordinates. Evaluate Triple integral SSSE where E lies between the spheres x^2 + y^2 + z^2 = 25 and x^2 + y^2 + z^2 = 49 in the first octant.

**math**

Change from rectangular to cylindrical coordinates. (Let r ≥ 0 and 0 ≤ θ ≤ 2π.) (a) (3, −3, 2) (b) (−2, −2sqrt3, 5)

**calc**

Write the equations in cylindrical coordinates. (a) 3z = 2x^2 + 2y^2 (b) 7x^2 + 7y^2 = 4y

**Calc**

Find the rectangular coordinates of the point, whose cylindrical coordinates are given. (a) (4, π/4, 1) (x, y, z) = (b) (6, −π/3, 5) (x, y, z) =

**Calc**

Change from rectangular to cylindrical coordinates. (Let r ≥ 0 and 0 ≤ θ ≤ 2π.) (a) (3, −3, 2) (b) (−2, −2sqrt3, 5)

**Calc**

Write the equations in cylindrical coordinates. (a) 3z = 2x^2 + 2y^2 (b) 7x^2 + 7y^2 = 4y

**CALC**

Find the rectangular coordinates of the point, whose cylindrical coordinates are given. (a) (4, π/4, 1) (x, y, z) = (b) (6, −π/3, 5) (x, y, z) =

**Math**

Cheater! Do your own math. Cheating = Lazy. Work hard!

**Math**

Use a triple integral to find the volume of the given solid. The solid enclosed by the cylinder x^2 + y^2 = 9 and the planes y + z = 19 and z = 2.

**Math**

Use a triple integral to find the volume of the given solid. The tetrahedron enclosed by the coordinate planes and the plane 8x + y + z = 4

**Math**

Find center of mass of the lamina that occupies the region D and has the given density function ρ. D is the triangular region with vertices (0, 0), (2, 1), (0, 3); ρ(x, y) = 5(x + y) mass=30 Find center of mass

**math**

what is the solution to the following system? -2x-y=1 -4x-2y=-1

**CALC**

Use a triple integral to find the volume of the given solid. The solid enclosed by the cylinder x^2 + y^2 = 9 and the planes y + z = 19 and z = 2.

**CALC**

Use a triple integral to find the volume of the given solid. The tetrahedron enclosed by the coordinate planes and the plane 8x + y + z = 4

**SOCIAL STUDIES (CHECK answer)**

MS sue how does saying i agree help anyone

**Calc**

Find the mass and center of mass of the solid E with the given density function ρ. E is bounded by the parabolic cylinder z = 1 − y^2 and the planes x + 6z = 6, x = 0, and z = 0; ρ(x, y, z) = 4. m=? x, y, z=?

**Calc**

Use a triple integral to find the volume of the given solid. The solid enclosed by the cylinder x^2 + y^2 = 9 and the planes y + z = 19 and z = 2.

**math**

why do you need to tell everybody their location??? that makes no sense at all

**Calc**

Use a triple integral to find the volume of the given solid. The solid enclosed by the cylinder x^2 + y^2 = 9 and the planes y + z = 19 and z = 2.

**Calc**

Use a triple integral to find the volume of the given solid. The tetrahedron enclosed by the coordinate planes and the plane 8x + y + z = 4

**Calc**

Evaluate the triple integral. SSS(triple integral T 3x^2 dV where T is the solid tetrahedron with vertices (0, 0, 0), (1, 0, 0), (0, 1, 0), and (0, 0, 1)

**Calc**

Evaluate the following integral using three different orders of integration. *triple integral E (xz − y3) dV, where E = (x, y, z) | −1 ≤ x ≤ 3, 0 ≤ y ≤ 4, 0 ≤ z ≤ 3

**Calc**

Find the mass and center of mass of the lamina that occupies the region D and has the given density function ρ. D is the triangular region with vertices (0, 0), (2, 1), (0, 3); ρ(x, y) = 5(x + y) m=? (x,y)=?

**CALC**

Its wrong.

**Thermochemistry**

The given reaction was: 2C6H6(l)+15O2(g)=12CO2(g)+6H2O(g) dH rxn= -6278kJ

**Thermochemistry**

What volume of benzene (C6H6, d= 0.88g/ml, molar mass= 78.11g/mol) is required to produce 1.5x10^3 kJ of heat according to the following reaction? I just can't figure out what equation to use to solve this. Help, please?

**Physics Force and Friction question**

A crate of mass 100kg is at rest on a horizontal floor. The coefficient of static friction between the crate and the floor is 0.4, and the coefficient of kinetic friction is 0.3. A horizontal force, F, or magnitude 350N is applied to the crate. Which of the following is true? ...

**Physics**

You are in an elevator that is accelerating upwards at 2m/s^2. If your mass is 70kg, what is the normal force pushing on you by the floor of the elevator? A. 70N B. 690N C. 830N Please give the correct answer and an explanation as to why its correct.

**Physics**

A crate of mass 100kg is at rest on a horizontal floor. The coefficient of static friction between the crate and the floor is 0.4, and the coefficient of kinetic friction is 0.3. A horizontal force, F, or magnitude 350N is applied to the crate. Which of the following is true? ...

**Physics**

Multiple Choice. If all of the forces acting on an object an object are balanced (net force is zero), then: a. The object's speed will decrease b. The object's direction of motion can change, but its speed cannot C. The object is ecperiencing zero acceleration Please ...

**Physics**

Why is the joule-second (J*s) equivalent to kg*m^2/s ?

**physics**

A stone is thrown vertically upward at 23 m/s. How fast is it moving when it reaches 14 m?

**Social Studies**

Okay thank you so much!

**Social Studies**

Why did the Western Roman Empire fall? Thank you for helping me!

**Social Studies**

Okay thank you so much I really really appreciate it!

**Social Studies**

How might Greece's psychical features have affected the development of Greek trade, culture, and legacy? Thank you for the help

**Social Studies**

Okay, thank you so much, have a nice day/night!

**Social Studies**

______Introduced Europeans to Muslim inventions, such as the astrolabe that helped sailors navigate the seas. A) The Crusades(I pick this) B) The Reconquista C) The Vikings D) The Magna Carta Thank you for helping me!

**physics grade 11**

how do i figure out how fast a car is going when all i know is frequency?

**connections Academy sucks**

I hate connections with a passion, I'm currently in 8th grade and feel like I have a life time of work. Sometimes I break down and cry at 3am because of the stress of the Leaps and portfolios. If anyone wanted to ask if connections was a good school I would tell them that ...

**Math. please help**

-1/2 + 1/3 = Adding and subtracting fractions with rational numbers.

**History**

thx Sarah :)

**Calc**

Evaluate the integral by reversing the order of integration. (2 integrals) 0 to 8 cube root(y) to 2 8e^(x^4) dx dy

**Calc**

Evaluate the integral by reversing the order of integration. (2 integrations) 0 to 1 sqrt(x) to 1 8(y^3+1) dy dx

**Calc**

Evaluate the integral by reversing the order of integration.(2 integrals) 0 to 4 5ex2 dx dy 3y to 12

**Calculus**

Find the volume of the solid under the plane 3x + 3y − z = 0 and above the region bounded by y = x and y = x^4

**Calculus**

Find the volume of the given solid. Under the surface z = 7xy and above the triangle with vertices (1, 1), (4, 1), and (1, 2)

**HELP ME PLEASE I NEED HELP history**

Why did Congress decide the election of 1800? Select two a. based on the outcome, it was mandated by the us consitutuion *** b. the popular vote was a tie c. no candidate won the electoral vote d: not enough citizens voted to determine the outcome ***

**Physics (PLEASE HELP PRONTO)**

A cart with a mass of 5.35 kg is placed on a frictionless ramp at an angle of 14.2. The cart is released and rolls down the ramp. Find the acceleration.

**C++**

It won't compile because it's saying the second "else if" isn't valid. I have tried changing things around and the best I can get is when I enter a value starting with"A" it returns nothing and a value starting with "B" returns and ...

**C++**

I am trying to create a program that displays shipping charges for two region codes. The region code has to have exactly 3 characters (the letter A or B followed by two numbers). Display a message if invalid region code is entered. use a sentinel value to exit program. ...

**science**

we need to see the answers

**art**

Please link the art or I cannot help you.

**Social Studies**

Were these answers right????

**Health**

Lyssey likes to bully others here and she is wrong. Your answers aren't all wrong.

**Math**

thank you so much!

**Math**

oh wait!! is it 9?!

**Math**

[(8^2 - 4) - 6] / 6 = ?? i think it's 59?? idk what the brackets mean. can someone PLEASE explain this to me???

**Physics**

A 300kg bobsled starts down an icy slope inclined at 12 degrees. There is some friction between the bobsled and the slope. If the hill is 200m long, how long does it take for the sled to reach the bottom?

**Physics**

A 300kg bobsled starts down an icy slope inclined at 12 degrees. There is some friction between the bobsled and the slope. Write the equations of motion in the two directions where the x axis is along the hillside.

**English**

yea i need help on this too someone help

**American Government**

can confirm, it is C

**Social Studies**

what was the flaw in the act passed by congress that established a tax on whiskey? a. it rewarded farmers who grew corn b. it did not spread the tax burden evenly** c. it was similar to taxes britan had proposed d. it had to be collected in person by tax collectors

**world history**

omg 100%

**Math please help!!!**

Julia is allowed to watch no more than 5 hours of television a week. So far this week, she has watched 1.5 hours. Write and solve an inequality to show how many hours of television Julia can still watch this week.

**american Government**

I swear Ms.Sue is Ms. Scott.. lol

**check my work**

100% correct :)

**check my work**

1. B 2. A 3. C 3/3 100%

**math**

x^3-(p+q-r)x^2+(pq-pr-qr)x+pqr How to factor this??

**physics**

Answer to my own question, you use d=vi*t+1/2*a*t^2 after solving for t you use d=vxo*t

**physics**

A pitcher throws a baseball horizontally from the mound to home plate. The ball falls 0.868 m (2.85 ft) by the time it reaches home plate 18.3 m (60 ft) away. How fast was the pitcher's pitch?

**american goverment check answers**

Anonymous is 100% right

**american goverment check answers**

100% correct. ^ Thanks.

**Math**

I came up with a different example, Jack wants to buy 4 pumpkins, but he needs to know how much the pumpkins cost so he doesn't spend more than $25. 4p ≤ 25 4p/2 ≤ 25/4 p=6.25 p ≤ $6.25 is this right?

**Math**

Give a real-world scenario in which you would write an inequality rather than an equation. I was thinking, Jack has to bring at least $25 to a carnival. So the inequality would be x ≥ 25? or could you help me with a different example?

**American Government**

tj is correct

**Math 2**

Whats the question?

**Algebra 2**

Thank you!!!

**Algebra 2**

How did you get x^3/5?

**Algebra 2**

Thank you so much. I understand it now!!

**Algebra 2**

1. Convert the 5th root of x^3 into a rational expression. 2. Solve i^63 I don't know how to solve these so please help me!!!

**Science**

What is the question asking?

**Biology**

What are your answers?

**Maths**

BECAUSE NO ONE IS ANSWERING MY QUESTION. Im so sorry. I really need your help guys.

**Maths**

Plastic drinking straws are manufactured to fit into drinks cartons which have a hole in the top. A straw fits into the hole if the diameter of the straw is less than 3 mm. The diameters of the straws have a normal distribution with mean 2.6 mm and standard deviation 0.25 mm...

**Math**

I just wanna try. If me, I do it like this, 35/(35+72) X 100% = 32.7%

**Calculus**

Find the velocity and position vectors of a particle that has the given acceleration and the given initial velocity and position. a(t) = 2 i + 6t j + 12t2 k, v(0) = i, r(0) = 2 j − 7 k

**Calculus**

Find the tangential and normal components of the acceleration vector. r(t) = t i + t2 j + 4t k aT= aN=

**Government**

OCA was correct, but 4 is actually B, Separation of powers, got 9/10 thanks!

**Calculus**

The curves r1(t) = 5t, t^2, t^4 & r2(t) =sin t, sin 4t, 3t intersect at the origin. Find their angle of intersection, θ, correct to the nearest degree.

**Calculus**

Find parametric equations for the tangent line to the curve with the given parametric equations at the specified point. x = 5 ln t, y = 8sqrt(t), z = t^5 (0,8,1) (x(t),y(t),z(t))=( )

**Maths**

A curve is such that dy/dx = 2- 8(3x+4)^-1/2 - A point P moves along the curve in such a way that the x-coordinates is increasing at a constant rate of 0.3 units per second. Find the rate of change of the y-coordinates as P crosses at the y-axis.

**Calculus**

a) Find parametric equations for the line through (4, 1, 4) that is perpendicular to the plane x − y + 2z = 7. (Use the parameter t.) b) In what points does this line intersect the coordinate planes? xy-plane? yz-plane? xz-plane?

**Calculus**

Consider the following planes. 5x − 4y + z = 1, 4x + y − 5z = 5 a) Find parametric equations for the line of intersection of the planes. b) Find the angle between the planes

**Calculus**

Find (a cross b)dot product a? & Find the cross product(a × b) dot product b? a = 1, 1, −1 b = 4, 8, 10