Thursday
September 29, 2016

Posts by Kristina

Total # Posts: 223

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

3rd grade
There are 33 students in the band. There are 6 more fifth-grade students than third-grade students. There are an equal number of third- and fourth-grade students. How many third-grade students are in the band?
October 8, 2008

Medical Billing and Coding
I have to do a research paper on Lupus. I need help with an introduction paragraph. ( 3-5 sentences) and a conclusion paragraph.
August 11, 2008

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