Monday

April 21, 2014

April 21, 2014

Total # Posts: 2,655

**Geometry**

A train travels uphill at a 12 degree angle. The train rises 150 from the bottom to the top of the hilL. about how long is the track?

**Substitution method**

x=2y y=2x+3 ??

**chemistry**

a 52.0 gram sample or water increases in temperature due to the addition of a hot metal from 17.7 degrees C to 24.4 degrees C. How many calories has the water absorbed? how many calories did the metal lose?

**6th grade**

analogie:After is to before as epilogue is to

**bio 101**

how the organism in the diagram has evolved physiologically to become suited to its environmen

**college**

The angle of elevation from point A to the top of a vertical pole is 30.0 degrees. At point B, 6 meters closer to the base of the pole and on a line through the base of the pole and point A, the angle of elevation to the top of the pole is 37.0 degrees. Find the height ( to th...

**college**

Solve 9 tan x +5 =0, where 0 <= x <= 360

**Math**

10+4=14 20-1=19 19*14=266

**Physics**

What is the momentum of a two-particle sys- tem composed of a 1300 kg car moving east at 60 m/s and a second 1500 kg car moving west at 95 m/s? Let east be the positive direction. Answer in units of kg · m/s.

**MATH**

HOW DO YOU DO INPUT & OUTPUT DIVISION Tables

**Finance**

A company requires the amount of $1,000,000 in 25 years to retire a bond issue. Assume they can earn 5 3/4% interest compounded daily. What amount would they have to pay quarterly to be able to retire this debt in 25 years?

**physics**

suppose that a horizontal force of 0.7 n is required to pull a 5.0 kg block across the table at constant speed. what is the initial speed of a 20 g bullet, fired horizontally into the block, if the bullet imbeds in the initially stationary block and causes the block to slide 1...

**math**

15

**College Chemistry**

Given 400.0 g of hot tea at 80.0C, what mass of ice at 0C must bea added to obtain iced tea at 10.0C? The specific heat of water is 4.18 J/(g*C), The specific heat of water is 4.184 kJ/mol.

**Chemistry**

At the melting point of benzene, the DH of fusion is 9.95 kJ/mol and the DS of fusion is 35.7 J/K.mol. What is the temperature at which benzene melts?

**PHYSICS: Waves in Media**

An organ pipe is open at one end and has a length of 3 m. What is its fundamental frequency if the speed of sound is 336 m/s?

**10th grade**

a 5.0 kg bowling ball is rolling down the lane at 4.0 m/s. what is the kinetic energy of the bowling ball?

**college**

An essay on- To what extent was president andrew jackson one of the nation'smost effective president?

**Chemistry**

Caluclate the delta H for this reaction using standard enthalpies of formation. (The standard enthalpy of formation of liquid pentane is -146.8kJ/mol. Balanced equation balanced equation: C5H12(l)+8O2(g)-->5CO2+6H2O(g) CO2=393.5 H2O=40.7

**physics**

At 10:15 am snail 1 crossed the 65 cm mark with a velocity of 4cm/min. In a great burst of energy, Snail 1 raced to the 90 cm mark in 3 minutes. His velocity as he crossed the 90 cm mark was 7cm/min. What was the acceleration of Snail 1?

**Chemistry**

A large sport utility vehicle has a mass of 2500kg. Calculate the mass of CO2 emitted into the atmosphere upon accelerating the SUVfrom 0.0mph to 66.0 mph. Assume that the required energy comes from the combustion of octane with 30% efficiency. (Hint: Use KE= 1/2mv^2 to calcul...

**Biology**

Please help !!!! two bacteria, "Claire" and "Bob" are infected with a virus. Claire explodes several hours later and Bob lives happily ever after.... until one day when Bob feels stressed out and all the sudden, explodes as well. What happened to bacteria &...

**Math**

Use the echelon method to solve the following system: x/5+3y=31 2x-y/5=8

**Math**

Write an expression that represents each question What is 2/3 of 3/8? How many 3/8 are in 2/3?

**Math**

True?

**Math**

Is 3/4 between 7/12 and 18/24 on the number line?

**Science**

The pigment melanin in the skin functions to a. Produce new living cells in the epidermis b.help protect the skin fron sunburn c. Keep water within the skin

**Science**

When the body becomes too warm blood vessels in the skin become _____?

**7th grade**

find the next three numbers in the pattern 2/3, 1 5/12, 2 1/6, 2 11/12 _, _, _

**math**

if 720 can be written as the product of five consecutive integers, determine the middle integer.

**calculus**

if the area of a triangle with the base 2F and height F-2 is equal to F, compute F.

**chemistry**

determin the formal charge on each atom in the following molecules and ions. (a)OSCL2 (b)FSO3

**math**

what is the area and perimeter of 1.7*4

**algebra**

find the range of the given domain {-1,0,1} f(x)= 3x^2-2x+2

**college algebra**

g(x)= {x+6, x is less or equal to -4 {1/2x -4, x> -4

**college algebra**

g(x)= {x+6, x is less or equal to -4 {1-2x -4, x> -4

**Math**

In traveling across flat land, you notice a mountain in front of you. Its angle of elevation to the peak is 3.5 degrees. After you drive 13 miles closer to the mountain, the angle of elevation is 9 degrees. Approximate the height of the mountain.

**Math**

A goat is tethered to a stake in the ground with a 5 m rope. The goat can graze to the full length of the rope a fulll 360 around the stake. How much area does the goat have in which to graze? What would be the figure?

**History**

Is there any website where I could find the picture of the Empresario Grants Coahuila Y Tejas Map?

**Math**

In traveling across flat land, you notice a mountain in front of you. Its angle of elevation to the peak is 3.5 degrees. After you drive 13 miles closer to the mountain, the angle of elevation is 9 degrees. Approximate the height of the mountain.

**Math**

How do you figure it out from there though? Because I got that far and couldnt figure out how to solve for x.

**Math**

In traveling across flat land, you notice a mountain in front of you. Its angle of elevation to the peak is 3.5 degrees. After you drive 13 miles closer to the mountain, the angle of elevation is 9 degrees. Approximate the height of the mountain.

**General Chemistry**

Calculate the E of the following cell if [CIO3] = 1.5M, [H]= 0.5M, [CI]=1.0M and [CU2]= O.25M: CI03 + 3CU + 6H = CI- +3Cu2+ +2h20

**physics**

what force is acting on a circular platform rotating opposite of a person standing on the edge?

**algebra**

-3r+18=6r

**physics**

So, for the acceleration I got 1.096e-11 is this right?

**physics**

So, for the acceleration I got 1.096e-11 is this right?

**physics**

Three uniform spheres are located at the corners of an equilateral triangle. Each side of the triangle has a length of 3.30 m. Two of the spheres have a mass of 3.10 kg each. The third sphere (mass unknown) is released from rest. Considering only the gravitational forces that ...

**Chemistry**

A helium baloon has a volume of 28.9L, what is the mass of helium inside the ballon? what is the mass of the same volume of air it displaces? MM of air = 29.0g/mol, 25C (temperature) and 1 atm.

**Calculus**

A ball is dropped from the top of a building. The height, , of the ball above the ground (in feet) is given as a function of time, , (in seconds) by y = 1640 - 16t^2 y'= -32t When does the ball hit the ground, and how fast is it going at that time? Give your answer in fee...

**calculus**

A ball is dropped from the top of a building. The height, , of the ball above the ground (in feet) is given as a function of time, , (in seconds) by y = 1640 - 16t^2 y'= -32t When does the ball hit the ground, and how fast is it going at that time? Give your answer in feet...

**AP PHYSICS**

Work done by friction= forcefriction*distance=mu(fn)*distance where fnormal= mg-2.3E2Sin21 Fd= (.200)(.700X9.8X-2.3E2Xsin21)X(7)= Work done by friction=19790.15328.. thats what I got and it is wrong i believe

**AP PHYSICS**

It did not work thats why I wanted to see if someone else had a better input. It was the wrong answer.

**AP PHYSICS**

A 2.30 102 N force is pulling an 80.0 kg refrigerator across a horizontal surface. The force acts at an angle of 21.0° above the surface. The coefficient of kinetic friction is 0.200, and the refrigerator moves a distance of 7.00 m. Find the work done by the kinetic fricti...

**algebra**

(c+g)(c^2-cg+g^2)

**Math**

What are the horizonatal asymptotes of y=(1000)/(1+9e^(-.1656x))?

**Math**

What are the horizonatal asymptotes of y=(1000)/(1+9e^(-.1656x))?

**Literature**

According to charley's psychiatrist, how can charley's visit to the third level be explained

**physics**

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 h should the...

**Physics Help!!!**

In one cycle, a heat engine absorbs 5900 J at 360°C and exhausts 520 J. How much work does it do per cycle?

**math**

If a cardboard box measures 1 1/2 feet on each side what expression will represent the volume of the box

**western experience**

Oh thats right!My second thoght was E. feminists

**western experience**

Can someone please check my answers? 1. In the early 1970s the only European nation capable of meeting its own oil production needs was A. Great Britain B. France C. Germany D. the soviet union E. Spain D. The soviet union 2. Which group has seen its imporance in European poli...

**science**

1.accerlate 2.Friction

**history**

What did Americanization reveal about white Americans view of Native Americans?

**Physics**

O ok. My teacher told us we had to separate it into 3 separate parts, but i'm not sure how to do that.

**Physics**

A hot air balloon starts at its launching station and it goes at a horizontal speed of 2.7 m/s and a vertical wind of 1.1 m/s. Once it reaches an altitude of 202 m, it stays at that altitude for 10.3 s, which is when it drops a sandbag. How far will the sandbag land from the l...

**Western Civilization**

In the postwr West, philosophers and intellectuals have challenged many of the assumptions abouth truth, objectivity, science, and progress that have dominated the Western outlook since the Enlightenment. Summarize the arguments and approaces of the most important poswar schoo...

**Physics**

where did you get 4.6*10^6?

**Physics**

A satellite has a mass of 5600 kg and is in a circular orbit 3.70*10^5 m above the surface of a planet. The period of the orbit is two hours. The radius of the planet is 4.20*10^6 m. What is the true weight of the satellite when it is at rest on the planet's surface?

**physics**

A man who weighs 50.0 N stands 3.00 m from the right end of a board that is supported by two vertical cords attached to either end of the board. The board is 5.00 m long and weighs 10.0 N. What is the tension in each of the two cords?

**math**

Explain, in complete sentences, how you would use the graphing method to solve the following system of equations. Provide the solution to the system and explain what the solution represents on the graph. x + 4y = –16 3x + 2y = 12

**Physics, PLEASE HELP!!**

A long jumper jumps with the initial velocity of 12.0 m/s at an angle of 20 degrees. what is the displacement of x?

**calculus**

it doesn't work

**8th grade**

It would be T(n)=20+.75n

**physical science **

Platinum has a density of 23.4g/cm3. What is its mass?

**history**

Many subjects connected with our social economy call for immediate improvement. As examples: We should bring more citizens under the coverage of old-age pensions and unemployment insurance. We should widen the opportunities for adequate medical care. We should plan a better s...

**chemistry**

A stock solution is prepared by adding 26 mL of 1.1 M K3PO4 to enough water to make 30 mL. How many moles of K+ are in 21 mL of the stock solution?

**Physics-Please help explain**

What happens to a rollercoaster's motion in terms of energy when it goes over a second hill that is higher than the first hill.I think it is because the kinetic energy does not have the momentum so when converted into PE, it can't make it over a higher hill. Coorect or...

**Physics**

Suppose I apply a force to an initially motionless object. I push on the edge at an angle of 30 degrees. What is the torque on this object in terms of r and F?

**logarithmic differentiation **

How do you find the logarithmic differentiation of y = x^-cos x ?

**Social Studies**

Each European group that set up colonies settled in the specific part of the Americas. What are the two facts that lead to that generalization?

**Social Studies**

Describe the geographical features of your community or region. How might they have influenced people to settle there?

**physics**

A fountain reaches a height of 140 m. The pumps provide 0.50 m^3/s of water. What is the radius of the jet at the bottom of the fountain? Hint: find the velocity first, then use continuity.

**physics:energy**

A car (mass 920 kg) drives up a hill (height 328 m) in 143 seconds. At the bottom of the hill, it has a speed of 24 m/s, but at the top, it has slowed down to 14 m/s. Neglecting friction, what is the average engine power? I tried using 1/2mv^2 and it didn't work.

**Physics**

I think we might be in the same physics class. For this question I put -12 and was incorrect...what did you put so we can get the answer choices down to two options?

**4th grade**

PLEASE HELP ME MY HOMEWOrk rK HAVE TO TURENED IT IN TOMMOROW!!!!!!!!!!!!!!!!!!!!!!!!!AAHHHHHHHHHHHHH GOING CRAZY

**trig**

Rewrite the expression in terms of the first power of the cosine. Use a graphing utility to graph both expressions to verify that both forms are the same. 5 sin6(x)

**Math**

Using only the numbers 1-8 without repeating any of them, what is _+_=_-_=_-_=_-_=_? And the last number has to be the same as the first cause it's in a circle don't forget!!

**Senator**

Can you help me write a speech to become the high school senator? i need to get a good one that really hooks the kids.

**English**

you spelled arrived wrong.

**English**

What patriotism means to me? any good ideas on what to say?

**Physics**

A 9.5 kg monkey is hanging by one arm from a branch and is swinging on a vertical circle. As an approximation, assume a radial distance of 90 cm between the branch and the point where the monkey's mass is located. As the monkey swings through the lowest point on the circle...

**Physics**

A 9.5 kg monkey is hanging by one arm from a branch and is swinging on a vertical circle. As an approximation, assume a radial distance of 90 cm between the branch and the point where the monkey's mass is located. As the monkey swings through the lowest point on the circl...

**science**

Give the condensed structural formula for 1-butanol. (Type your answer using the format CO2 for CO2.)

**physics**

In a typical golf swing, the club is in contact with the ball for about 0.0010 . If the 45- ball acquires a speed of 57 , estimate the magnitude of the force exerted by the club on the ball.

**Science**

Give the condensed structural formula for 1-butanol

**biology**

in biology we are studying taxonomy. we are classifying our organisms by broadest to most specific: kingdom phylum class order family genus species how would i do this for a Siberian tiger?

**8th grade Science**

What does Air Mass Consist of?

**physics**

A solid disc with radius R is is spinning. An object exerts a force F at the edge of the disc to slow down the disc. The disc slows down to rest in 2.0 seconds. How long would the disc take to stop if: the mass of the disc doubled in s the radius of the disc doubled in s the f...

Pages: <<Prev | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | **15** | 16 | 17 | 18 | 19 | 20 | 21 | Next>>