Wednesday

April 16, 2014

April 16, 2014

Total # Posts: 787

**Honors Chemistry**

A sample of CO2(g) at 305mmHg goes from 13 degress celsius to 25 degress celsius. What is the new pressure?

**Math**

ok, thanks. I was just thinking I had to use the same number for M & M on the top and bottom of the fraction. I understand now. Thanks so much!

**Math**

I thought in this problem M and N had to be the same numbers so how could we do 1*2 over 25-1. Also, M has to be larger than N........still confused.

**Math**

the numbers M and N are different numbers selected from the first 25 counting numbers: If M is larger than N, what is the smallest value that M * N over M-N could have?

**liberal arts**

3(x – 2) + 4x = -27

**Physics help! **

An extreme skier, starting from rest, coasts down a mountain that makes an angle of 26.7 ° with the horizontal. The coefficient of kinetic friction between her skis and the snow is 0.248. She coasts for a distance of 10.5 m before coming to the edge of a cliff. Without slo...

**Physics 2**

A 0.564-kg basketball is dropped out of a window that is 5.85 m above the ground. The ball is caught by a person whose hands are 1.89 m above the ground. (a) How much work is done on the ball by its weight? What is the gravitational potential energy of the basketball, relative...

**PHYSICS**

Bicyclists in the Tour de France do enormous amounts of work during a race. For example, the average power per kilogram generated by Lance Armstrong (m = 75.0 kg) is 6.50 W per kilogram of his body mass. (a) How much work does he do during a 117-km race in which his average sp...

**Physics! **

One of the new events in the 2002 Winter Olympics was the sport of skeleton (see the photo). Starting at the top of a steep, icy track, a rider jumps onto a sled (known as a skeleton) and proceeds - belly down and head first - to slide down the track. The track has fifteen tur...

**Chemistry II**

At a certain temperature, Kc = 33 for the reaction: H2(g) + I2(g) 2HI(g) Assume that the initial concentrations of both H2 and I2 are 6.00 x 10-3 mol/L. Find the concentration of each reactant and product at equilibrium.

**MATH**

i NEED HELP SOLVING THIS WITH SUBSTITUTION 0.1X + 0.4Y= -2.6

**Math 209**

Draining the vat. With only the small valve open, all of the liquid can be drained from a large vat in 4 hours. With only the large valve open, all of the liquid can be drained from the same vat in 2 hours. How long would it take to drain the vat with both valves open?

**Math & Stats**

Please help I was up till 2am trying to figure this out last night, Thanks The top selling Red and Voss is rated 70,000 miles, which means nothing. In fact, the distance the tires can run until they wear out is a normally distributed random variable with a mean of 82,000 miles...

**Math**

I am really have a tough time trying to solve this problem. I think my first three steps are correct but I am not sure. Could someone please help me? I got lost somewhere on one of these steps. I thonk it was step 3, 4, 5. Thank you. The two numbers chosen for my solution will...

**Math**

I am stuck on trying to figure out how to do this question. Could someone please show me 5 necessary steps ? Thank you. Here is how the assignment question is worded. Select any two integers between -12 and +12 which will become solutions to a system of two equations. Write tw...

**physics**

A car has an acceleration of 16 pc/y2. This value can be CONVERTED into which of the following units?

**physics**

W=FD 300/2 = 150 N

**physics homework! #92**

A small sphere is hung by a string from the ceiling of a van. When the van is stationary, the sphere hangs vertically. However, when the van accelerates, the sphere swings backward so that the string makes an angle of è with respect to the vertical. Find the acceleratio...

**Physics GO! (82)**

To hoist himself into a tree, a 72.0-kg man ties one end of a nylon rope around his waist and throws the other end over a branch of the tree. He then pulls downward on the free end of the rope with a force of 365 N. Neglect any friction between the rope and the branch, and det...

**Physics (76)**

the weight of the block on the table is 422 N and that of the hanging block is 185 N. Ignoring all frictional effects and assuming the pulley to be massless, find (a) the acceleration of the two blocks and (b) the tension in the cord.

**physics! (69)**

A damp washcloth is hung over the edge of a table to dry. Thus, part (mass = mon) of the washcloth rests on the table and part (mass = moff) does not. The coefficient of static friction between the table and the washcloth is 0.395. Determine the maximum fraction [moff/mtotal] ...

**physics :)**

A circus clown weighs 875 N. The coefficient of static friction between the clown's feet and the ground is 0.630. He pulls vertically downward on a rope that passes around three pulleys and is tied around his feet. What is the minimum pulling force that the clown must exer...

**physics!**

A 1.60-kg bottle of vintage wine is lying horizontally in a rack. The two surfaces on which the bottle rests are 90.0° apart, and the right surface makes an angle of 45.0° with respect to the horizontal. Each surface exerts a force on the bottle that is perpendicular t...

**PHYSICS!!**

Air rushing over the wings of high-performance race cars generates unwanted horizontal air resistance but also causes a vertical downforce, which helps cars hug the track more securely. The coefficient of static friction between the track and the tires of a 552-kg car is 0.967...

**Physics (49)**

An ice skater is gliding horizontally across the ice with an initial velocity of +5.33 m/s. The coefficient of kinetic friction between the ice and the skate blades is 0.0988, and air resistance is negligible. How much time elapses before her velocity is reduced to +2.26 m/s?

**Physics (46)**

A 4.67-kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.446. Determine the kinetic frictional force that acts on the box when the elevator is (a) stationary, (b) accelerating upward with an acc...

**Math**

Coould someone please let me know if I did this equation correctly. This question relates the topic of "Are you Sure It's Fat Free". To analyze the protein content I used 4 calories per gram of protein, rather than the 9 calories for gram fat. (Chunk Light Tuna i...

**Math**

Help me please to simplify 8 to 8th power x 8 negative 8th power

**Physics**

How much work must be done to bring three electrons from a great distance apart to within 2.1Ã—10âˆ’10 {\rm m} from one another (at the corners of an equilateral triangle)?

**physics**

The drawing shows a 29.7-kg crate that is initially at rest. Note that the view is one looking down on the top of the crate. Two forces, F1=88N and F2=54N, are applied to the crate, and it begins to move. The angle is 55 degrees. The coefficient of kinetic friction between th...

**Physics**

Two skaters, a man and a woman, are standing on ice. Neglect any friction between the skate blades and the ice. The mass of the man is 81 kg, and the mass of the woman is 60 kg. The woman pushes on the man with a force of 50 N due east. Determine the acceleration (magnitude an...

**Physics :)**

Part (a) of the drawing shows a bucket of water suspended from the pulley of a well; the tension in the rope is 55.2 N. Part (b) shows the same bucket of water being pulled up from the well at a constant velocity. What is the tension in the rope in part (b)?

**Physics Homework**

The drawing shows a 29.7-kg crate that is initially at rest. Note that the view is one looking down on the top of the crate. Two forces, F1=88N and F2=54N, are applied to the crate, and it begins to move. The angle is 55 degrees. The coefficient of kinetic friction between the...

**PHYSICS**

Two horizontal forces, F1 and F2, are acting on a box, but only F1 is shown in the drawing. F2 can point either to the right or to the left. The box moves only along the x axis. There is no friction between the box and the surface. Suppose that = +6.2 N and the mass of the box...

**Physics!!**

During a circus performance, a 73.1-kg human cannonball is shot out of a 19.5-m-long cannon. If the human cannonball spends 0.921 s in the cannon, determine the average net force exerted on him in the barrel of the cannon.

**Physics!**

Two skaters, a man and a woman, are standing on ice. Neglect any friction between the skate blades and the ice. The mass of the man is 81 kg, and the mass of the woman is 60 kg. The woman pushes on the man with a force of 50 N due east. Determine the acceleration (magnitude an...

**PHYSICs**

The drawing shows a 29.7-kg crate that is initially at rest. Note that the view is one looking down on the top of the crate. Two forces are applied to the crate, and it begins to move. The coefficient of kinetic friction between the crate and the floor is k = 0.324. Determine ...

**Physicss**

Chapter 4, Problem 40 A 94.9-kg person stands on a scale in an elevator. What is the apparent weight when the elevator is (a) accelerating upward with an acceleration of 2.30 m/s^2, (b) moving upward at a constant speed, and (c) accelerating downward with an acceleration of 1...

**Physics **

A person pushes on a 60-kg refrigerator with a horizontal force of -260 N; the minus sign indicates that the force points in the -x direction. The coefficient of static friction is 0.68. (a) If the refrigerator does not move, what are the magnitude and direction of the static ...

**Geometry Ms. Sue help please?**

you aren't ms.sue!!!!!

**statistics**

A manufacturer of computer disks has a historical defective rate of .001. What is the probability that in a batch oof 1000 disks, 2 would be defective?

**science**

why does the water line flatten out after 0 celsius

**help math ahhhh**

For questions 9–10, solve each system by elimination. 9. 5x + 4y = 1 3x – 4y = 7 (1 point) (–1, –1) (1, –1) (1, 1) 10. x + 2y = 5 3x + y = 10 (1 point) (3, –1) (1, 3) (3, 1)

**algebra **

The length of a rectangle is 6 cm more than four times the width. If the perimeter of the rectangle is 42 cm, what are its dimensions? a. length = 18 cm; width = 3 cm b. length = 18 cm; width = 9 cm c. length = 6 cm; width = 9 cm d. length = 3 cm; width = 18 cm

**algebra **

solve the system of equations using substitution. y = 2x + 5 y = 3x a. (–5, –15) b. (5, 15) c. (–15, –5) d. (1, 3)

**algebra **

solve the system of equations using substitution. y = x + 10 y = 3x a. (5, 15) b. (2.5, 7.5) c. (–15, –5) d. (–5, –15)

**algebra **

thanks

**algebra **

solve the system of equations using substitution. y = 3x – 4 y = 2x – 1 (1 point) a. (–2, –9) b. (1, –1) c. (1, 1) d. (3, 5)

**algebra **

solve the system of equations using substitution. y = 4x + 2 y = 3x + 6 a. (4, 18) b. (–4, –14) c. (–14, –4) d. (–4, –6)

**algebra**

Choose the compound inequality that repesents the situation. all real numbers at least –6 and at most 3 –6 >=x >= 3 –6 >=x >= 3 –6 < x < 3 –6 <=x <= 3

**algebra**

Choose the compound inequality that repesents the situation. all real numbers at least –6 and at most 3 –6 >x > 3 –6 >x > 3 –6 < x < 3 –6 <x < 3

**bio**

Discuss three types of fossils and how they are formed.

**bio**

Discuss how the external environment of an organism can affect gene function.

**Biology**

Compare and contrast the terms aerobic process and anaerobic process.

**Biology**

Explain the importance of carbon's ability to form covalent bonds in straight chains, branched chains, or rings.

**Bio**

An electromagnet can be made by wrapping insulated wire around an iron nail and connecting the ends of the wire to a 6-volt battery. HYPOTHESIS: Increasing the number of coils of wire wrapped around the nail increases the strength of the electromagnet, as measured by the numbe...

**english**

How does " an occurence at owl creek bridge" a reflection of the period of time?

**asymptotes and graphing, f**

graph and identify the horizontal asymptote y=7(1/4)x

**English**

Write 5 sentences about the role of education in successful financial planning, in which you correctly use a different verb tense in each. 1. Education "is very" (simple present tense) important in your critical role for financial success. 2. I'm "trying&quo...

**Math**

Suppose you earn $7 per hour The number of hours you work (input) determines your pay (output) i need the inputs and outputs

**Math**

complete the pattern 3 8 13 18 23 what three numbers come next?

**prob. statistics**

a survey indicates that 41% of women in the us consider reading as their favorite leisure time activity. you randomly select 4 women and ask them if reading is their favorite leisure time activity. find the probability that exactly 2 of them said yes

**chemistry**

there is 4.5 grams of acetic acid in 100 ml of water. how many moles of acetic acid is that?

**Math**

78

**child care**

thanks bobpursley ok 6 is not b so i think is a? and 20 if its 25-30% its b?

**Please check answers/ childcare**

thanks bobpursley ok 6 is not b so i think is a? and 20 if its 25-30% its b?

**Please check answers/ childcare**

thanks bobpursley ok 6 is not b so i think is a? and 20 if its 25-30% its b?

**Please check answers/ childcare**

hello i need someone to check these for me? 6) alcohol,drugs,radiation,and pollutants that affect a child development are called a.teratogens b.toxic inhibitors c.tranferal agents. d.phenylanines 10) monstrates an inability to leap over a barrier, his teacher checks to see if ...

**child care**

hello i need someone to check these for me? 6) alcohol,drugs,radiation,and pollutants that affect a child development are called a.teratogens b.toxic inhibitors c.tranferal agents. d.phenylanines 10) monstrates an inability to leap over a barrier, his teacher checks to see if ...

**Childcare Manegment /please chech answers**

hello i need someone to check these for me? 6) alcohol,drugs,radiation,and pollutants that affect a child development are called a.teratogens b.toxic inhibitors c.tranferal agents. d.phenylanines 10) monstrates an inability to leap over a barrier, his teacher checks to see if ...

**can you please check my answers**

1) A strategy for health promotion among infants toddlers and young children focuses on educational programs physical fitness activities and a. family planning b.tobacco,alcohol, and drug use. c.Nutrition. d.mental health & menta disorders. 2)The main goal of effective health...

**chemistry**

After writing a balanced equation for the reaction between magnesium and hydrochloric acid, calculate the mass of magnesium needed to produce 90ml of hydrogen gas @ STP conditions.

**General Physic**

The time it takes for an object dropped from the top of cliff A to hit the water in the lake below is twice the time it takes for another object dropped from the top of cliff B to reach the lake. If it takes 2.30 s for the object to fall from cliff A to the water, what are the...

**english (Frederick Douglass)**

Whatis the most important description of Mr. Gore?

**english (Frederick Douglass)**

Why do you think Douglass says of the killing of slave Demby ‘in an instant poor Demby was no more. His mangled body sank out of sight, and blood and brains marked the water where he stood.”?

**sociology**

Im in Illinois and Yes its the same book Chapter 12 pg 365... Im so lost and dont know where to start. From Rasmussen as well. LOL

**history**

How did the settlement house movement differ from earlier attempts to relieve poverty?

**history**

in the 1800s

**history**

How did professionalization meet the needs of the developing American economy In the urban life?

**childcare**

ok thanks

**childcare**

its for my homework

**childcare**

exam 00383001 need help withj 5 questions

**childcare**

thanks :O)

**English (Grade 6)**

What is the best website to practice direct and indirect speech, adjectives and verbs for free? Thank you

**physics**

When a woman runs 140 meters north and then 60 meters west, what is the magnitude of her total displacement?

**Physics**

How does progress today differ from progress thousands of years ago?

**MATH **

3 OUT OF EVERY 4 STUDENT HAVE A COMPUTER AT HOME IF THERE ARE80 STUDENTS HOW MANY HAVE COMPUTERS AT HOME

**MATH **

IN A CLASS 3 OUT OF EVERY 7 STUDENT ARE MALES IF THERE ARE 27 MALES HOW MANY STUDENT ARE IN THE CLASS

**12th Grade Government**

Why was it important to the Founding Fathers to justify their actions by evoking traditional English rights?

**12th Grade Government**

_____ believed that there should be no limits to the power of the government once the will of the people was determined.

**physics**

Suppose I have a spring. I add a mass (m = 1.0 kg) and it is displaced by 15 cm. What is the spring constant k in units of (N/m)?

**Accounting**

Need help with this bank reconciliation...this is actually for a job and I am forgetting everything about accounting because I am nervous. BANK RECONCILATION ============================================== On Aug 14th, One of our Partner's ( Compuville ) cash book showed a ...

**algebra**

Use muliplying by 1 to find an expression equivalent to 10/13 with a dominator of 39a Please kindly help. I don't understand what to do. Thanks!

**math116**

-8x-27=-32 1/5 the solution must be in the form as an integer or simplified fraction. Thank you.

**PHYSICS ---HELP!**

A patient is to be given a blood transfusion. The blood is to flow through a tube from a raised bottle to a needle inserted in the vein . The inside diameter of the 4.8 cm long needle is 0.48 mm, and the required flow rate is 4.9 cm/3 of blood per minute. How high should the b...

**physics**

Blood from an animal is placed in a bottle 2.0 m above a 3.4 cm long needle, of inside diameter 0.35 mm, from which it flows at a rate of 2.9 cm^3/min. What is the viscosity of this blood? Assume Pblood}=1.05 * 10^3 kg/m^3.

**chemistry**

a 5% acetic acid solution contains -----grams of acetic acid per ------

**College Algebra**

USE MULTIPLICATION PRINCIPLE - X/2 = 8 X=_________ I APPRECIATE THE HELP!

**math**

complete the order triple 8x-y+z=22, 4x+2y-3z=13, x-3y+2x=-6

**Alg & Trig 2**

find the sum of 1/2, 2/7x, and 5/x

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