Friday

March 27, 2015

March 27, 2015

Total # Posts: 326

**physics**

If the speed of sound in air is 340 m/s, what is. approximately the length of a shortest air column closed at one end that will respond to a tuning fork of frequency 134 Hz? Answer in units of cm.
*March 17, 2015*

**physics**

The distance between two consecutive nodes of a standing wave is 22 cm. The hand generating the pulses moves up and down through a complete cycle 3.89 times every 4.68 s. Find the velocity of the wave. Answer in units of m/s
*March 17, 2015*

**physics**

An automobile having a mass of 1330 kg is driven into a brick wall in a safety test. The bumper behaves like a spring of constant 4.12 × 106 N/m and compresses 4.99 cm as the car is brought to rest. What was the speed of the car before impact, assuming no energy was lost...
*March 17, 2015*

**physics**

The body of a 1285 kg car is supported on a frame by four springs. The spring constant of a single spring is 2.80 × 104 N/m. Four people riding in the car have a combined mass of 275 kg. When driven over a pothole in the road, the frame vibrates and for the first few ...
*March 16, 2015*

**math**

how do you create of six values that does not represent a linear relation. All the y-values must increase in value as x increase in value?
*March 4, 2015*

**math **

Please help me on linear relation. I have tries but I am really stuck on the creating table and graphing. 1. provide a table of six values that represent a linear relation. All the y-values must be less then zero. 2. provide a table of six values that does not represent a ...
*March 3, 2015*

**physics**

A light, rigid rod l = 5.55 m in length rotates in the xy plane about a pivot through the rod’s center. Two particles of masses m1 = 9.8 kg and m2 = 2.4 kg are connected to its ends find the moment of inertia
*February 12, 2015*

**physics**

A student holds two lead weights, each of mass 12 kg. When the students’ arms are extended horizontally, the lead weights are 0.82 m from the axis of rotation and the student rotates with an angular speed of 1.5 rad/sec. The moment of inertia of student plus stool is 5.5 ...
*February 12, 2015*

**physics**

A light, rigid rod l = 5.55 m in length rotates in the xy plane about a pivot through the rod’s center. Two particles of masses m1 = 9.8 kg and m2 = 2.4 kg are connected to its ends. Determine the angular momentum of the system about the origin at the instant the speed of...
*February 12, 2015*

**physics**

A cylindrical 9.16 kg pulley with a radius of 0.373 m is used to lower a 2.64 kg bucket into a well. The bucket starts from rest and falls for 3.94 s. What is the linear acceleration of the falling bucket? The acceleration of gravity is 9.81 m/s 2 . Answer in units of m/s 2
*February 11, 2015*

**physics**

After coming down a steep hill at a constant speed of 49 m/s, a car travels along the circumference of a vertical circle of radius 329 m until it begins to climb another hill. What is the magnitude of the resultant force on the 170 kg driver of the car at the lowest point on ...
*January 24, 2015*

**physics**

A ball of mass 21.7 g is attached to a cord of length 0.61 m and rotates in a vertical circle. What is the minimum speed the ball must have at the top of the circle so the cord does not become slack? The acceleration of gravity is 9.8 m/s . Answer in units of m/s
*January 24, 2015*

**math**

I need help on this question. Can someone help me get through with these question The area of canada is approximately 1x10(Exponent)7, and the area of Mexico is approximately 2x10 (exponent)6 square kilometers. The area of Canada is approximately how many times the area of ...
*January 21, 2015*

**math**

Denise calculated the missing side length of one of these triangles using the Pythagorean Theorem. Which triangle is it
*January 6, 2015*

**English**

CHECK PLEASE? Is this a good analytical paragraph? Edgar Allen Poe’s poem, “The Bells”, uses personification and alliteration in order to establish a new tone for each stanza. Personification is used to create a transition in the stanzas, to differentiate the ...
*November 18, 2014*

**Language Arts**

Is this a good analytical paragraph? Edgar Allen Poe’s poem, “The Bells”, uses personification and alliteration in order to establish a new tone for each stanza. Personification is used to create a transition in the stanzas, to differentiate the tone change ...
*November 18, 2014*

**english**

wat the answr
*November 6, 2014*

**Geometry**

1.1.Determine whether the regular pentagon has reflection symmetry, rotation symmetry, both, or neither. If it has reflection symmetry, state the number of axes of symmetry. If it has rotation symmetry, state the angle of rotation. For each type of symmetry, explain how you ...
*October 17, 2014*

**Finance kennedy king**

4. A firm's net income last year was $1.5 million. Its net income grew 5 percent during the last 5 years. If that growth rate continues, how long will it take for the firm's net income to double?
*October 13, 2014*

**Finance math**

9. Compute the present value of $4,000 paid in five years using the following discount rates: 10 percent in year 1, 2 percent in year 2, 12 percent in year 3, and 9 percent in years 4 and 5.
*October 12, 2014*

**8**

8. You invested $2,000 in the stock market one year ago. Today, the investment is valued at $9,500. What return did you earn? What return would you need to suffer next year for your investment to be valued at the original $2,000?
*October 12, 2014*

**7**

6. You are scheduled to pay a $350 cash flow in one year, and receive a $1,000 cash flow in years 3 and 4. If interest rates are 10 percent per year, what is the combined present value of these cash flows?
*October 12, 2014*

**6**

6. You are scheduled to pay a $350 cash flow in one year, and receive a $1,000 cash flow in years 3 and 4. If interest rates are 10 percent per year, what is the combined present value of these cash flows?
*October 12, 2014*

**5**

5. Assume you borrow $5,000 today and pay back the loan in one lump sum four years from today. You are charged 8 percent interest per year. What amount will you pay back and how much interest will you pay?
*October 12, 2014*

**F**

4. A firm's net income last year was $1.5 million. Its net income grew 5 percent during the last 5 years. If that growth rate continues, how long will it take for the firm's net income to double?
*October 12, 2014*

**Csu**

3. What is the value in year 20 of a $1,000 cash flow made in year 8 if interest rates are 15 percent in years 6 through 13 and increase to 18 percent in the remaining years?
*October 12, 2014*

**Kennedy king**

2. A $5,000 investment has doubled to $10,000 in ten years. How much longer will it take for the investment to reach $15,000 if it continues to earn the same rate?
*October 12, 2014*

**engineering mechanics**

the greatest and least resultant of two forces are respectively 17 KN and 5 KN. determine the angle between two force when their resultant is root 144 KN.
*September 14, 2014*

**economics 6**

fffg
*September 7, 2014*

**Math**

Choose the best description for the real number 34/5 Irrational, because it is a fraction Irrational, because it is a repeating decimal Rational, because it is a fraction Rational, because it is a terminating decimal
*August 28, 2014*

**Stats**

the average placement test score of a sample of 64 students out of 1000 registered at a community college is 70 with a standard deviation of 15. Construct a confidence interval with a 5% chance of error.
*April 6, 2014*

**chemistry**

Question Part Points Submissions Used A swimming pool, 20.0 m ✕ 12.5 m, is filled with water to a depth of 3.85 m. If the initial temperature of the water is 18.9°C, how much heat must be added to the water to raise its temperature to 28.7°C? Assume that the ...
*March 25, 2014*

**Geometry**

Can you please explain this to me?
*March 13, 2014*

**Geometry**

Find the area of the composite figure(right triangle), where the hypotenuse is 13m, base is 12m and the height is not given?
*March 13, 2014*

**Physics**

A rifle shoots a 4.1g bullet out of it's barrel. The bullet has a muzzle velocity of 975 m/s just as it leaves the barrel. Assuming a constant horizontal acceleration over a distance of 43.0 cm starting from rest, with no friction between the bullet and the barrel, what ...
*February 20, 2014*

**physics**

How do I calculate the radial acceleration in g's? For example: Calculate the radial acceleration (in g’s) of an object on the ground at the earth's equator, turning with the planet. Earth's radius is 6380 km.
*February 3, 2014*

**Math- Systems of equations and inequalities**

The last one about a science teacher is 70 ML of the 50% solution and 35mL of the 80% solution
*January 13, 2014*

**Physics**

A 26.2 g marble sliding to the right at 62.0 cm/s overtakes and collides elastically with a 13.1 g marble moving in the same direction at 15.5 cm/s. After the collision, the 13.1 g marble moves to the right at 77.5 cm/s. Find the velocity of the 26.2 g marble after the ...
*January 8, 2014*

**Math**

furry sack of balls
*December 6, 2013*

**Chemistry**

Describe the creation of 234 mL of a 3.2 M sodium chloride solution
*December 2, 2013*

**physics**

You walk 51 m to the north, then turn 30° to your right and walk another 45 m. How far are you from where you originally started?
*November 14, 2013*

**physics**

I figured it out. 130N. I forgot about gravity.
*November 2, 2013*

**physics**

a woman weighs Fg=650 when standing on a stationary scale. The woman is riding an elevator from the 1st floor to the 10th floor. As the elevator approaches the 10th floor, it decreases its upward speed from 9 m/s to 1 m/s in a time interval of 1 second. What is the average ...
*November 2, 2013*

**GEOMETRY**

5√3/3 Can somebody evaluate this PLEASE!!!!!!
*October 21, 2013*

**GEOMETRY**

simplify 5√3/3
*October 21, 2013*

**GEOMETRY**

no i dont have a calculator thats why im asking what it is? can you please give me the answer. this is the last problem 2 my homework and i can't figure it out
*October 21, 2013*

**GEOMETRY**

i need it simplified to the nearest 10th
*October 21, 2013*

**GEOMETRY**

simplify 5 squareroot(3)/3
*October 21, 2013*

**u.s history**

Where did John Wilkes Booth shoot Abraham Lincoln?
*October 18, 2013*

**u.s history**

How did the Civil War end?
*October 18, 2013*

**u.s history**

How did the Civil War affect women?
*October 18, 2013*

**health**

Whats the largest bone in your body?
*October 16, 2013*

**GEOMETRY**

44411001444
*October 16, 2013*

**GEOMETRY**

parallelogram with a side of 40in a base of 36in and a height of 33in. WHAT IS THE AREA?
*October 16, 2013*

**Math**

A couple needs $15,000 as a down payment for a home. If they invest the $10,000 they have at 8% compounded quarterly, how long will it take for the money to grow into $15,000?
*October 9, 2013*

**Calculus**

Finf (dy/dx) y=(1+28x^3)f(x)+(6x)g(x)(x^4+5x+7)+(6x)g(x)(x^4+5x+7)-(e^x+7x^4)f(x)+3x^2g(x)(4x^3+5+7)/((x^4+5x+7)^2
*October 6, 2013*

**physics**

A test rocket is launched vertically from ground level (y = 0 m), at time t = 0.0 s. The rocket engine provides constant upward acceleration during the burn phase. At the instant of engine burnout, the rocket has risen to 49 m and acquired a velocity of What is the maximum ...
*September 26, 2013*

**troy**

A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 15.0° below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a constant acceleration ...
*September 24, 2013*

**math**

The owner of a service station receives a loan of $8,500 at 10.5% for 7 months. Find the amount of simple interest
*September 20, 2013*

**Calc**

Sqrt(xyz) I rewrote it has x^(1/2)*y^(1/2)+z^(1/2) And the derivative with respect to x is Sqrtyz/(2sqrtx) is that right
*September 20, 2013*

**math**

-x/y^2 = x/(1/y) is that a true statement?
*September 19, 2013*

**choice**

Varsity Press, a publisher of college textbooks, received a $70,000 promissory note at 12% ordinary interest for 60 days from one of its customers, Reader’s Choice Bookstores. After 20 days, Varsity Press discounted the note at the Grove Isle Bank at a discount rate of ...
*September 16, 2013*

**math**

From 70 feet away from the base of a tree on level ground, the angle to the top of a tree is 60⁰. What is the height of the tree? What is the approximate distance from the vantage point to the top of the tree, to one decimal point? (Assume that the tree is perpendicular ...
*June 12, 2013*

**Algebra**

9 more than 2 times x
*June 9, 2013*

**physics**

if the * is the degrees, then you need to draw the vectors according to their direction. you can use a graph paper and make your own scale: say one unit cube is 10km/hr. then use the protractor to draw the vectors taking an horizontal line as zero degrees. then draw the ...
*June 6, 2013*

**Science**

which of the following is an example of a mineral? silver, lava, fossils, sand, I say Lava
*May 15, 2013*

**statistics**

9,873.35
*April 23, 2013*

**stats**

suppose that a population of people is 1200. .25 of the population is white. we take a random sample of 100 people. What is the probabilit that more than .29 of these people are white?
*April 16, 2013*

**U.S/history AP**

King Cotton works for me
*April 13, 2013*

**chemistry**

A metal block of mass 11.5 g gives off 360 J of heat while cooling from 99.7 to 32.5 oC. What is the specific heat of the metal in J g-1 oC-1?
*March 26, 2013*

**chemistry**

A metal block of mass 11.5 g gives off 360 J of heat while cooling from 99.7 to 32.5 oC. What is the specific heat of the metal in J g-1 oC-1?
*March 26, 2013*

**Science**

Name 3 ways screws are used?
*March 21, 2013*

**math**

which fraction cannot be expressed as repeat decimal? a) 1/11 b)1/4 c 5/8 d 2/3
*March 21, 2013*

**math**

solve the equation: 3x-8=12
*March 21, 2013*

**German**

there is none. im trying to determine if that sentence is grammatically correct or incorrect.
*March 1, 2013*

**German**

Ich schminke mich lieber als er sich. is this incorrect or correct?
*March 1, 2013*

**Cosmology**

Comparison of emissions from elliptical galaxies in x-ray and optical bands
*March 1, 2013*

**chemistry**

Iwish to prepare 3% NH3 from 20ml strong NH4OH and 180ml H2O.Can you help me?
*February 7, 2013*

**S.S**

dis is funny
*January 30, 2013*

**Chemistry**

tyr-trp-phe-val-lie
*January 27, 2013*

**Binomial Math**

.2150
*January 27, 2013*

**Math**

Need help with 4th grade fractions.
*January 24, 2013*

**Math**

Jeramie has a jar of nickels and dimes. There are 200 coins worth $14.00. How many of each type of coin are in the jar. :)
*January 23, 2013*

**economics**

Mary earns $100/day at a flower shop. She will take 2 days off without pay to attend an out of town wedding. Transportation will cost $180 round trip. Hotel $99/day for 2 nights. What is the opprotunity cost?
*January 13, 2013*

**geometry**

angle xoz (5m-5) angle yoz (7m+29) these are supplementary angles. How do you solve?
*January 4, 2013*

**Chemistry**

What preperation produces a 2.0 Mole solution of C6H12O6? a) 90.0 grams of C6H12O6 dissolved in 500.0 mL of solution b) 180.0 grams of C6H12O6 dissolved in 1000mL of solution c) 90 Grams of C6H12O6 dissolved in 1000mL of solution D) 180.0 Grams of C6H12O6 dissolved in 500.0mL ...
*December 19, 2012*

**English**

yes it is C
*December 17, 2012*

**The Age Of Jefferson To The American Expansion**

18 is not D because i got it wrong when i answer the questions
*December 7, 2012*

**Finance**

questo
*December 2, 2012*

**CHEMISTRY**

What is oxygen extensive properties?
*November 30, 2012*

**chemistry**

Rate Constant * Concentration^2
*November 29, 2012*

**Math**

12 over 7 simplified
*November 29, 2012*

**Math**

-5 over 8 times -3
*November 29, 2012*

**Math**

10x and 45x to the power of 4
*November 29, 2012*

**chemistry**

Rate Constant * Concentration^2
*November 29, 2012*

**chemistry**

Rate Constant * Concentration^2
*November 29, 2012*

**Chemistry**

thanks
*November 29, 2012*

**Chemistry**

Rate Constant * Concentration^2
*November 29, 2012*