# Posts by Kristina

Total # Posts: 225

**pre-calc**

find the exact value of (5pie/8)

*April 22, 2012*

**physics**

what relationship do you expect between the change in the kinetic energy and the change in the potential energy?

*April 5, 2012*

**physics**

what relationship do you expect between the change in the kinetic energy and the change in the potential energy?

*April 5, 2012*

**physics**

Qualitatively explain how you would expect the potential energy to change as a glider slides down an inclined air track, where friction is negligible.

*April 5, 2012*

**physics**

Qualitatively explain how you would expect the kinetic energy to change as a glider slides down an inclined air track, where friction is negligible.

*April 5, 2012*

**physics**

If you weigh 650 N on the earth, what would be your weight on the surface of a neutron star that has the same mass as our sun and a diameter of 15.0 km ? Take the mass of the sun to be ms = 1.99×10^30 kg, the gravitational constant to be G = 6.67×10^−11 Nxm^2...

*March 29, 2012*

**Physics**

How large must the coefficient of static friction be between the tires and the road if a car is to round a level curve of radius 85 m at a speed of 95 km/h?

*March 25, 2012*

**Physics**

A 15 kg child stands on the edge of a small merry-go-round of radius 2.0 m. If the merry-go- round turns at a steady rate of 11 rpm, calculate the magnitude and direction of the net force on the child.

*March 25, 2012*

**Physics**

how am i suppose to know what theta is?!?

*March 14, 2012*

**Physics**

In the design of a supermarket, there are to be several ramps connecting different parts of the store. Customers will have to push grocery carts up the ramps and it is obviously desirable that this not be too difficult. The engineer has done a survey and found that almost no ...

*March 14, 2012*

**Physics**

A roller coaster reaches the top of the steepest hill with a speed of 3.0 . It then descends the hill, which is at an average angle of 40 and is 50.0 long. Estimate its speed when it reaches the bottom. Assume kinetic friction (uk) = 0.18 .

*March 14, 2012*

**French**

Can someone edit my ISU? it's only 8 paragraphs.

*January 16, 2012*

**Physics**

A bucket of mass M = 5.47 kg is attached to a second bucket of mass m = 3:52 kg by an ideal string. The string is hung over an ideal pulley as shown in the gure. Mass M is started with an initial downward speed of 2.13 m/s. What then is the speed (m/s) of mass M after it has ...

*December 13, 2011*

**law**

I have a midterm for criminal justice class to do and the istructor she said as soon as we log in to the system we would have 2 hours 15 mins to complete it

*October 30, 2011*

**REALLY EASY**

Which of the following explanations correctly describes the reason we see the Sun rise and set each day? 1.The Sun rotates on its axis 2.The Earth revolves around the Sun in an elliptical path 3.The Earth rotates on its axis 4.The Sun revolves around the Earth in an elliptical...

*September 19, 2011*

**REALLY EASY**

Which of the following are a consequence of the Earth's yearly motion around the Sun? (check all that apply) 1.the Sun appears in different constellations in different seasons 2.the planets look different than stars 3.the Sun rises and sets 4.the Moon exhibits phases 5....

*September 19, 2011*

**physics**

A truck at rest at a stoplight accelerates uniformly with acceleration a = 8 meters/second2 for 5.5 seconds after the light turns green. What is the speed of the truck in meters/second after that time interval?

*September 18, 2011*

**Physics**

A car accelerates uniformly (a = constant) from 34 meters/second up to 40 meters/second in 4.0 seconds. What is the acceleration of the car in meters/second2?

*September 18, 2011*

**Elementry education major**

how many tens are in 13,644 A.4 B.13,644 C.1,364 D1,364.4

*August 31, 2011*

**Chem 2**

The half-life for the radioactive decay of U-238 is 4.5 billion years and is independent of initial concentration. a) How long will it take for 10% of the U-238 atoms in a sample of U- 238 to decay? b)If a sample of U-238 initially contained 1.9×1018 atoms when the ...

*July 21, 2011*

**History**

All of the following inclined the US toward entering on the side of the Allies in WWI EXCEPT? although some progressives opposed war, the idealistic progressive spirit pointed toward an American campaign to end militarism and establish a peaceful world order. although an ...

*June 26, 2011*

**calculus**

A regular decagon(12 sides) in inscribed in a circle with the radius r. The decagon has an area of108 in^2. What is the radius of the cirlce?

*May 19, 2011*

**calculus**

A regular decagon(12 sides) in inscribed in a circle with the radius r. The decagon has an area of108 in^2. What is the radius of the cirlce?

*May 19, 2011*

**Physics**

Inside the cylinders of a diesel engine, the mixture of fuel and air is compressed to about 1/20 of its original volume. Although diesel engines have no spark plugs to ignite this mixture, it ignites anyway because of what?

*May 6, 2011*

**algebra**

what are two factors of 240 that subtract or add to 14.

*March 24, 2011*

**chemistry**

What is the total amount of heart absorbed by 100.0 grams of water when the temperature of the water is increased from 30.0 degrees Celcius to 45.0 degrees Celcius?

*March 16, 2011*

**Physics**

At a height of 15 meters above the surface of a lake, a sound pulse is generated. The echo from the bottom of the lake returns to the point of origin 0.150 s later. The air and water temperatures are 20°C. How deep is the lake?

*February 11, 2011*

**Chemistry**

How much energy does it take to convert 12.5 grams of water to water vapor?

*February 3, 2011*

**hcr 230**

I was hoping someone could look over my paper and tell me if I am answering correctly the questions below. For patient billing to be operative, dependable financial procedures and policies need to be in order to clarify to the patients what is their responsibility to pay. ...

*January 21, 2011*

**calculus**

The area of a rectangle is 25cm^2. Express the perimter of the rectangle in terms of its width.

*January 19, 2011*

**Phys**

A series of waves traveling at 200m/sec are being generated by a 100 Hz source. A point at the very top of the crest of a certain wave is _______ meters from a corresponding point 3 'crests' away. 0 1.5 2.7 4 6.0 12.0 16.0 30000 I think its 4 b/c 200+200=400 and 400/...

*November 30, 2010*

**Physics**

i think its 4 b/c 200+200=400 and 400/100=4

*November 30, 2010*

**Physics**

A series of waves traveling at 200m/sec are being generated by a 100 Hz source. A point at the very top of the crest of a certain wave is _______ meters from a corresponding point 3 'crests' away. 0 1.5 2.7 4 6.0 12.0 16.0 30000

*November 30, 2010*

**Math**

you divide 12 by 6 first, your supposed to go in order from left to right then multiply by 3 then subtract by 5

*November 22, 2010*

**algebra**

Find the radius of a circle with an area of pi(16x^2+24x+9)

*November 22, 2010*

**Statistics**

a roulette wheel has 40 slots evenly divided between red (even) and green (odd) slots totaling 38 and a "0" and a "00". what is the probability of the ball landing in an: A)even number < 10 B) other than an even or odd number C) odd number > 15 D) ...

*November 21, 2010*

**hcr220 college**

I am confused with what they are wanting me to do. It says write a 1500 to 1750 word essay in which you discuss implications of both forms of the patient's diseases, HIV and AIDS, from the perspective of HIPAA confidentiality. I am confused on what implications means.

*November 21, 2010*

**history**

Your welcome.

*November 20, 2010*

**history**

I believe that it would be c

*November 20, 2010*

**hcr220 college**

Thank you.

*November 20, 2010*

**hcr220 college**

This is a cms 1500 form. Part One: Resources: Appendix A, Appendix C, and Table 8.3 on pp. 258–259 of Medical Insurance Refer to Table 8.3 on pp. 258–259 of your text to complete the CMS-1500 form, located in Appendix C, according to the following case study: A 67-...

*November 20, 2010*

**hcr220 college**

is there an email that I can post an attachment?

*November 20, 2010*

**hcr220 college**

I have done my cms 1500 form but I want to make sure that I did it correctly. Here it goes: i tried to post it but it will not allow

*November 20, 2010*

**Spanish 1**

46.would be d because they are plural 47.c there is not anyone in the house. 48. is true

*November 20, 2010*

**Health ins**

Course project,to research a healthcare facility How do i write a Outline

*November 20, 2010*

**CALC**

Evaluate the integral: the integral of [5e^(2t)]/[1+4e^(2t)]dt. I used u sub and let u=e^2t and got 5/2arctan(e^2t)+C. But this answer is incorrect. Please help. Thanks

*November 17, 2010*

**Calculus**

Evaluate. The integral of (e^5x)(sin6x)dx

*November 16, 2010*

**Physics homework help**

those are the answer choices in my book...

*November 14, 2010*

**Physics homework help**

do I multiply .67 times 10 log .67?

*November 14, 2010*

**Physics homework help**

What approximate change in decibles does an observer experience form a sound source if the oberver moves to a new location that is 67% as far from the source? 23 -23 40 2.76 -2.76 1.94 -1.94 2.57 -2.57 0

*November 14, 2010*

**science**

if we say that one quantity is proportional to another quantity does that mean they are equal to each other explain using mass and weight as an example

*November 7, 2010*

**Math- Calc**

Find the volume of the solid formed by rotating the region enclosed by y=e^(4x)+2, y=0, x=0, x=0.8

*October 29, 2010*

**Math- Calc**

Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Then find the area of the region. y=e^(4x), y=e^(6x), x=1

*October 29, 2010*

**Calculus**

This is a tough one :( The region between the graphs of x=y^2 and x=6y is rotated around the line y=6. Find the volume of the resulting solid please... i am unable to get the correct answer :(

*October 22, 2010*

**chemistry**

0.00097973

*October 11, 2010*

**economics**

How do you think our nation’s output should be distributed according to income or according to some other standard (such as basic human need)?

*September 12, 2010*

**Science/Math**

If the temperature of a room is 70 degrees F, what is the temperature of the room in Celsius? In Kelvin?

*September 6, 2010*

**college_anthropology**

What does miners piece tell us about the difficulty of describing another culture?

*September 1, 2010*

**anthropology**

What ethical challenges come up when studying another culture? How does one balance the fact that anthropology is part social science, part humanity, and part biology?

*September 1, 2010*

**algebra**

in a mixture if concrete, there are four lb of cement mix for each pound of gravel. if the the mixture contains a total of 195 lb of these two ingredients, how many pounds of gravel are there?

*July 11, 2010*

**math**

a minor league baseball team plays 88 games in a season . if the team won 17 more then twice as many games as they lost , how many wins and losses did the team have

*July 11, 2010*

**Trig**

Prove the trig identity cos(4x)=2-sec^2(2x)/sec^2(2x)

*April 14, 2010*

**algebra 2**

3 radical 4x^2 time s radical 6x^4 times 3radical 9x

*March 21, 2010*

**12th grade**

The three fifths compromise and the commerceand slave trade compromise were included in the constitution at the insistence of the southern states. Why did states in the south think these items were important and what price, if any, did southern states pay for their inclusion

*January 25, 2010*

**french**

this means the first floor

*January 25, 2010*

**history**

what do they mean by describe the social,composition of the decade of corporate greed

*January 20, 2010*

**Math**

Dwayne passes the 0 point running 4 meters per second to the right.Where is he 5 seconds later?Write a number sentence.

*January 10, 2010*

**Chemistry**

Could you explain in detail why a saponification reaction is considered to be the reverse of an esterification reaction.

*October 20, 2009*

**science**

what type of electromagnetic radiation does a flame emit?

*October 13, 2009*

**college**

The radiator in a certain make of car needs to contain 20 liters of 40% antifreeze. The radiator now contains 20 liters of 20% antifreeze. How many liters of this solution must be drained and replaced with 100% antifreeze to get the desired strength?

*October 4, 2009*

**Physics**

A golfer rides in a golf cart at an average speed of 3.10 m/s for 21.0 s. She then gets out of the cart and starts walking at an average speed of 1.60 m/s. For how long (in seconds) must she walk if her average speed for the entire trip, riding and walking, is 2.10 m/s? I need...

*October 2, 2009*

**Physics**

In a historical movie, two knights on horseback start from rest 94m apart and ride directly toward each other to do battle. Sir George's acceleration has a magnitude of 0.22 m/s2, while Sir Alfred's has a magnitude of 0.27 m/s2. Relative to Sir George's starting ...

*October 2, 2009*

**Physics**

I need help solving for T!!!

*October 2, 2009*

**Physics**

A golfer rides in a golf cart at an average speed of 3.10 m/s for 21.0 s. She then gets out of the cart and starts walking at an average speed of 1.60 m/s. For how long (in seconds) must she walk if her average speed for the entire trip, riding and walking, is 2.10 m/s?

*October 2, 2009*

**Literaure- King Oedipus**

One more question........ Who was King Oedipus lead away from?

*September 8, 2009*

**Literature- King Oedipus**

Who did Oedipus believe was his father?

*September 8, 2009*

**hhs 265 math accounting**

The following data represent total personnel expenses for the Palmdale Human Service Agency for past four fiscal years: 20X1 $5,250,000 20X2 $5,500,000 20X3 $6,000,000 20X4 $6,750,000 Forecast personnel expenses for fiscal year 20X5 using moving averages, weighted moving ...

*June 8, 2009*

**Chemistry**

An element has ccp packing with a face-centered cubic unit cell. Its density is 8.92 g/cm3 and the unit cell volume is 4.72 x 10-26 L. Calculate the molar mass (g/mol) of the element to three significant figures.

*May 16, 2009*

**Chemistry**

An element has ccp packing with a face-centered cubic unit cell. Its density is 8.92 g/cm3 and the unit cell volume is 4.72 x 10-26 L. Calculate the molar mass (g/mol) of the element to three significant figures.

*May 16, 2009*

**physics**

when you brake a car at a stop sign, what force provides the impulse to stop the car?

*March 12, 2009*

**7TH GRADE MATH**

100x.72=72, so 100+72 10x.30=3, so 10+3 and so on..

*March 12, 2009*

**Chemistry**

How do you determine the number of moles in 78.6 grams of carbon tetrachloride (CCl4) ?

*February 19, 2009*

**Chemistry**

How do you determine the number of atoms in 28.7 grams of gold (Au)

*February 19, 2009*

**Physics**

This is a projectile motion problem where I need to find the velocity and angle I launch a ball at to hit a ship. The ball is on a cliff 400 m high, and the ship is 250 m away from the cliff. The ship is moving away at a velocity of 40 m/s. What velocity and angle should I ...

*December 18, 2008*

**appeal letter**

Be honest. Tell them where you need help and what YOU will do in order to make a change and be more successful.

*December 5, 2008*

**3rd grade**

Thank you so much!

*December 4, 2008*

**3rd grade**

How can you use two multiplication facts to multiply 6 x 9? Use the array below to explain how you might multiply. ********* ********* ********* ********* ********* *********

*December 4, 2008*

**3rd grade**

1) Kevin is making yogurt bars for a picnic. He has 6 rows of yogurt bars on a tray. There are 3 bars in each row. How many yogurt bars does Kevin make? Answer: 6 x 3 = 18 yogurt bars 2) HOW CAN YOU USE MULTIPLICATION FACTS FOR 1 AND 2 TO FIND 3 x 7? I don't understand the...

*December 4, 2008*

**unit rate**

It is IDK cause I'm 5 😱

*December 4, 2008*

**3rd grade**

The question is: If the ones digit of a number greater than 1 is 0, what factor or factors must that number have? a) 2 only b) 5 only c) 2 and 5 d) neither 2 or 5 I thought neither D as it would have to be a number such as 10. 10 + 10 = 20 10 + 10 + 10 = 30 leaving zero's ...

*November 11, 2008*

**3rd grade**

Does anyone know what the 1-1-1 rule in regards to spelling?

*November 3, 2008*

**Math**

a minor league baseball team plays 88 games in a season . if the team won 17 more then twice as many games as they lost , how many wins and losses did the team have

*October 30, 2008*

**math**

Solve this equation. Verify your solution using a graphing utility. log_1/3(x2 + x) - log_1/3(x2 - x) = -1

*October 25, 2008*

**math**

Solve this equation. Verify your solution using a graphing utility. log_a(x - 1) - log_a(x + 6) = log_a(x - 2) - log_a(x + 3)

*October 25, 2008*

**math**

Express y as a function of x. The constant C is a positive number. ln y = 9x + ln C

*October 25, 2008*

**math**

Express y as a function of x. The constant C is a positive number. ln y = ln x + ln C

*October 25, 2008*

**math**

Suppose that ln7 = a and ln8 = b. Use properties of logarithms to write this logarithm in terms of a and b. ln root5(56)

*October 25, 2008*

**math**

Suppose that ln2 = a and ln3 = b. Use properties of logarithms to write this logarithm in terms of a and b. ln8

*October 25, 2008*

**Math**

Use properties of logarithms to find the exact value of this expression. Do not use a calculator. 6log6 8 - log6 7

*October 25, 2008*

**3rd grade**

Thank you!! I really appreciate your help! ( :

*October 8, 2008*