Karina
Most popular questions and responses by Karina
physics
Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 95.0 kg, down a θ = 50.0° slope at constant speed. The coefficient of friction between the sled and the snow is 0.100. (a) How much work is done by friction as the sled moves
asked on July 9, 2015 
Physics
The existence of the planet Pluto was proposed based on irregularities in Neptune's orbit. Pluto was subsequently discovered near its predicted position. But it now appears that the discovery was fortuitous, since Pluto is small and the irregularities in
asked on July 6, 2015 
Bassick High School
Vivian is walking to the hairdresser's at 1.3 m/s when she glances at her watch and realizes that she is going to be late for her appointment. Vivian gradually quickens her pace at a rate of 0.090 m/s2(squared) What is Vivians speed after 10.0s? At this
asked on September 7, 2010 
math
A scale drawing of an American flag is 10 inches long and 6 inches tall. The actual flag is 3 feet tall. a. True or False, the scale of the drawing is 2 in. : 1 ft. b. What is the perimeter of the american flag in the scale drawing? c. What is the area of
asked on May 19, 2016 
health
The breathing process is controlled by (Select all that apply) A. The diaphragm B. The pharynx C. Blood vessels D. rib muscles
asked on March 10, 2015 
Chemistry
Mass (before reaction): test tube + HCl(aq) + stir bar + capsule 26.600 g Mass (after reaction): test tube + HCl(aq) + stir bar + capsule 25.300 g Volume of water displaced from the squirt bottle 148 mL Temperature of the CO2(g) 287.4 K Pressure (atm)
asked on October 21, 2012 
Physics
Using energy considerations, calculate the average force a 62.0 kg sprinter exerts backward on the track to accelerate from 2.00 to 5.00 m/s in a distance of 25.0 m, if he encounters a headwind that exerts an average force of 30.0 N against him.
asked on July 9, 2015 
Physics
At takeoff a commercial jet has a 65.0 m/s speed. Its tires have a diameter of 0.700 m. (a) At how many rpm are the tires rotating? Incorrect: Your answer is incorrect. rpm (b) What is the centripetal acceleration at the edge of the tire? Incorrect: Your
asked on July 6, 2015 
geometry
which point is the midpoint of AE if A=6, B=4, C=2, D=1, E=8
asked on September 7, 2015 
Chm
Air is about 78.0% nitrogen molecules and 21.0% oxygen molecules. Several other gases make up the remaining 1% of air molecules.What is the partial pressure of nitrogen in air at atmospheric pressure (1 atm)? Assume ideal behavior.
asked on October 10, 2008 
probability
the model of the car you are thinking of buying is available in five different colors and four different styles. In how many ways can the car be ordered?
asked on November 10, 2012 
Calculus
Consider a hemispherical bowl of radius 10cm. (4 points) If the water level in the bowl is h cm deep, find the radius of the surface of the water as a function of h. (6 points) The water level drops at a rate of 0.1 cm per hour. At what rate is the radius
asked on December 2, 2012 
physics
what is the shortest possible time in which a bacterium could drift at a constant speed of 3.5mm/s across a petri dish with a diameter of 8.4cm
asked on September 15, 2010 
Chem/bio question
HA is an acid that ionizes in 10% in solution. what is the [h+] of a 0.01 m solution of ha?
asked on September 16, 2015 
Physics
An automobile with 0.300 m radius tires travels 75,000 km before wearing them out. How many revolutions do the tires make, neglecting any backing up and any change in radius due to wear?
asked on July 6, 2015 
MATH
Which of the following normal distributions has the smallest spread? A. A normal distribution with mean 1 and standard deviation 3 B. A normal distribution with mean 0 and standard deviation 2 C. A normal distribution with mean 3 and standard deviation 2
asked on December 7, 2010 
pre cal
an airplane is flying at an altitude of 2500 feet parallel to the ground, and the ground distance to the start of the airport runway is 7500 feet. What s the plane's angle of depression to the start of the runway? What is the distance between the airplane
asked on February 6, 2011 
pre cal
Tamara is flying in a hot air balloon. The hot air balloons is flying at an altitude of 1100 feet. The ground distance to the landing site is 1400 feet. What is Tamara's angle of depression to the landing site? What is the actual distance between the hot
asked on February 8, 2011 
physics
A rocket, initially at rest on the ground, accelerates straight upward with a constant acceleration of 34.3 . The rocket accelerates for a period of 8.00 before exhausting its fuel. The rocket continues its ascent until its motion is halted by gravity. The
asked on September 19, 2011 
pre cal
A submarine must descend 516 meters to explore a shipwreck. The submarine begins a constant descent to the shipwreck so that it will reach the shipwreck after traveling 2976 meters from the pint of its initial descent. What angle of descent did the
asked on February 8, 2011 
science
i need an acrostic poem of the word eukaryotic
asked on October 15, 2012 
algebra
In most state and local courts, 12 jurors and 2 alternates are chosen from a pool of 30 prospective jurors.The order of the alternates is specified. If a juror is unable to serve, then the first alternate will replace the juror.The second alternate will be
asked on April 4, 2013 
pre cal
A submarine is traveling parallel to the surface of the water of the water 492 feet below the surface. The submarine begins a constant ascent to the surface so that it will emerge on the surface after traveling 3974 feet from the point of its initial
asked on February 8, 2011 
physics
You pull upward on a stuffed suitcase with a force of 100 N, and it accelerates upward at 0.816 m/s2. (a) What is the mass of the suitcase?
asked on November 11, 2010 
Chemistry
Calculate the work done (in joules) by a chemical reaction if the volume increases from 3.3L to 3.5L against a constant external pressure of 3.7atm .
asked on July 12, 2013 
Physics
A car's bumper is designed to withstand a 6.84km/h (1.9m/s) collision with an immovable object without damage to the body of the car. The bumper cushions the shock by absorbing the force over a distance. Calculate the magnitude of the average force on a
asked on July 9, 2015 
math
Suppose you want to row your boat across a 3milewide river. You can row at a speed of 2.5 mi/h. The current is flowing south at a rate of 1.4 mi/h. At what angle upstream should you aim your boat so that is ends up going straight across?
asked on March 15, 2013 
pre cal
assuming that Earth is a sphere of a radius 6378 kilometers, what is the difference in the latitudes of Lynchbug, Virginia, and Myrtle Beach, South Carolina, where Lynchbug is 400 kilometers due north of Myrtle Beach?
asked on February 6, 2011 
physics
You pull upward on a stuffed suitcase with a force of 100 N, and it accelerates upward at 0.816 m/s2. (a) What is the mass of the suitcase?
asked on November 11, 2010 
Math
What statement makes this true? 9^2 A.81 B.18 C.1/81 D.1/81 Is it A?
asked on November 2, 2015 
english
which river flows into the gulf of mexico?
asked on February 4, 2015 
CHEMISTRY
Mass (before reaction): test tube + HCl(aq) + stir bar + capsule 26.600 g Mass (after reaction): test tube + HCl(aq) + stir bar + capsule 25.300 g Volume of water displaced from the squirt bottle 148 mL Temperature of the CO2(g) 287.4 K Pressure (atm)
asked on October 22, 2012 
CJ 216
Discuss the possible communication methods between the officer and his/her agency.
asked on January 12, 2013 
Physics
A dockworker applies a constant horizontal force of 90.0Nto a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 12.0min a time of 5.20s.If the worker stops pushing after 5.20s,
asked on October 5, 2012 
CHEMISTRY AP
Using Heisenberg's uncertainty principle, calculate the uncertainty in the position of the following. a 1.32mg mosquito moving at a speed of 1.61 m/s if the speed is known to within ± 0.01 m/s I used the principle and got 2.48e29 its wrong..and since
asked on October 23, 2011 
Math algebra
Sharons rectangular vegteable garden is 20 feet by 30 feet. In addition mulching her garden, she wants to put mulch around the outside of her garden in a uniform width. If she has enough mulch to cover an area of 936 sqaure feet, how wide should the mulch
asked on November 17, 2016 
CHEM AP please help!!
Using Heisenberg's uncertainty principle, calculate the uncertainty in the position of the following. a 1.32mg mosquito moving at a speed of 1.61 m/s if the speed is known to within ± 0.01 m/s i tried every way and still cant get it..please someone help
asked on October 23, 2011 
pre cal
Tamara is flying in a hot air balloon. The hot air balloon is flying at an altitude of 1100 feet. The ground distance to the landing site is 1400 feet. What is Tamara's angle of depression to the landing site? What is the actual distance between the hot
asked on February 6, 2011 
engllish
how are united states and canida alike in terms of farming and maniufacturing?
asked on February 4, 2015 
I am very struggling with ENG 4C!
Gees, I've been doing this ENG 4C lesson 6 for over a week now, have no idea how to do it.. :( Did anybody ever delt with ILC book fro ENG 4C?
asked on May 14, 2009 
english
which seven counteries are located in central america?
asked on February 4, 2015 
english
some times the number of electors for a particular states change what can be the cause for that change?
asked on February 4, 2015 
chemistry
Oxygen gas is collected over water at a temperature of 20c. If the totalmpressure of the system is 755mm, what is the pressure of the dry O2 gas?
asked on April 16, 2013 
Math
I don't know if my answer for this question is correct but can you please check? 1.) Between which pair of numbers does the square root of 15 lie? Do without using a calculator. A.) 3.7 and 3.8 B.) 3.8 and 3.9 C.) 3.9 and 4.0 D.) 14 and 16 I think the
asked on October 26, 2015 
english
which twoo counteries are farthest south?
asked on February 4, 2015 
dressmaking
Which type of fastener becomes more secure when yu try to pull the garment pieces apart? a) snap fastener b)hook and eye c)velcro d)zipper I feel the answer if b)but feel it cld also be d)What do yu think is right
asked on March 20, 2012 
math
I am a set of 5 whole numbers that are less than 30. My median is 10. My range is 15. My mode is 10. The smallest number in my set is 10. My mean is 14. What are my numbers?
asked on February 15, 2012 
pre cal
if a 22 inch tire rotates 40 times per 2 minutes, determine the linear and angular speed of the tire.
asked on February 6, 2011 
biology
what is cell history
asked on November 30, 2010 
Chemistry
A chemical reaction produces 3.75 L of chlorine gas at STP. How many moles of chlorine are produced by the reaction?
asked on August 24, 2017 
literature
what is an oral language piece?
asked on October 21, 2010 
English
I need to combine each of the folowing sentences and improve them( clarity and interest). English is not my first language,i am having harder times understanding this. 1. Every so often, a large group of wales or dolphins will throw itself upon shore. The
asked on January 6, 2009 
Chemistry
So we have a question for chem. homework and i really don't understand. can you please explain it..... Question:There is a change in the type of oxides formed with the period three elements. Indicate the type of compounds formed (ionic, amphoteric,
asked on May 17, 2008 
algebra
Consider making a fourdigit I.D. number using the digits 3,5,8, and 0 a. How many I.D. numbers can be formed using each digit once? b. How many can be formed using each digit once and not using 0 first? c. How many can be formed if repetition is allowed
asked on April 1, 2013 
math
On vacation, Le Hong averaged 45 mph traveling from city A to city B. Returning by a different route that covered the same number of miles, he averaged 50 mph. What is the distance between the two cities if his total traveling time was 30 hours
asked on November 8, 2012 
dressmaking
The tops of pants or a skirt is finished with facing when a)extra strength is required at the waistline b) its not possible to layer the fabric c) a stay tape cant be used in the seams d0yu don't want the waistband to be visible from the right side. My
asked on March 20, 2012 
psychology please help asap
Why might the study of identical (monozygotic) twins be valuable in constructing a model of abnormal behavior? How would dizygotic twins be different?
asked on January 16, 2012 
programming
How do you write a program that prints out your course schedule for a week? Here's an example of the output for one day: Monday 9:00 Computer Science 101 Monday 11:00 Physics 201 Monday 2:00 Dance 153
asked on September 18, 2011 
math
The product of two consecutive integers is two hundred forty. Find the two integers.
asked on April 10, 2011 
Chemistry
How many moles of calcium carbonate, CaCO3, are in 1.500 L of a 0.40M calcium carbonate solution?
asked on August 25, 2017 
Personal Finance
A $5000 loan has a stated rate of 10% but it will be paid off in 12 equal monthly payments. What is the APR on the loan?
asked on March 1, 2017 
algebra
A fair sixsided die is rolled. If the number showing is even, you lose a point for each dot showing. If the number showing is odd, you win a point for each dot showing. a. Find E(x)for one roll if x represents the number of point s you win. b. Find the
asked on April 1, 2013 
math
The length of a rectangle is three less than three times the width. The area is 90ft^2. Find the width and the length of the retangle.
asked on April 10, 2011 
pre cal
A boat has passed directly over a submarine as pictured below. The sub is running at a depth of 588 ft, and the angle of depression from the boat to the sub is 35 degrees. Find the distance, x, from the boat to the submarine.
asked on February 8, 2011 
geometry
WHAT IS BASE
asked on February 15, 2010 
Chemistry
What is the molecular formula of a molecule that has an em formula of CH and a molecular mass of 78.11 g/mol?
asked on August 25, 2017 
Chemistry
How many grams of sodium hydroxide, NAOH, are needed to make up 580 ml of 1.50M sodium hydroxide solution?
asked on August 24, 2017 
8th Grade Writing
That's great! that was my main idea but how would he be able to get the money from his brother anyway? so far i have made it so that the guy kidnaps his brother and his brother's wife. the daughters going to save them but how would he take the money?
asked on December 14, 2013 
8th Grade Writing
Hello, I'm writing a story and was wondering if someone could give me realistic reasons as to why a brother would kidnap hid brother? that's kind of what happenes in my story. the brothers are like 50 years old though. thank you!
asked on December 14, 2013 
Statistics
What critical value for z would be used to test the hypotheses: H0:μ≤10 and Ha:μ>10, for α = 0.05 ?
asked on July 1, 2013 
COLLEGE ALGEBRA
Solve by completing the square 12x^2+11x=5
asked on June 6, 2011 
pre cal
If an 22inch tire rotates 40 times per 2 minute, determine th elinear and angular speed of the tire.
asked on February 8, 2011 
english help!
Hi, I have a question. What is a news theme and why the media might develop one? I am not sure what this question mean? Thanks.
asked on May 14, 2009 
COLLEGE ALGEBRA ..HELP!
Solve by completing the square 12x^2+11x=5
asked on June 7, 2011 
math
how you could show five less than a number using a expression
asked on May 20, 2011 
Science
Explain how would the gravitational force between Earth and the Moon change if the distance between them increased?
asked on March 28, 2011 
Math
How do you find a perimeter
asked on September 22, 2010 
5th grade math
what does a feet equal?
asked on April 23, 2009 
Math
hanna has a bag of 15 red, 11 orange 9 yellow, 12 green, 6 blue and 11 purple crayond.How many times would you expect ganna to puck a red crayon if she picked a crayon 90 times?
asked on April 6, 2017 
Politics
Whats is an example of a change in political relations between powers that was in part the result of a change in discourse?
asked on March 12, 2017 
math
simplify 4 root of 500 over 4 root of 5 show work
asked on August 26, 2015 
Math
What is 6(a+7) when a=8
asked on October 29, 2013 
math/linear
4x + 5 = 2x + 19.. need to break down into coins and pouches. Need to know how many coins in each pouch.
asked on October 14, 2012 
fractions
2/5 of 15=?
asked on March 3, 2011 
Tourism and Hospitality
Hotel construction tends to come in waves, resulting in a) a major increase of capital flowing into the industry b) excess supply c) excess demand d) low interest rates on loans and mortgages I think the answer is b, excess supply. Because since hotel in
asked on June 9, 2009 
english
Ok, it says that I need to find a news report about a nonviolent property crime or fraud. And create a table with what? who? When? Where? How?( details of how the crime was done) How?(results to victim)How?(Public reaction, if any) and How?(results in
asked on May 14, 2009 
Math
Tina baked a loaf of cinnamon bread and cut it into 15 equal pieces. Four people ate an equal number of pieces left. there are three pieces left. what fraction of the bread to each person eat ?
asked on May 12, 2016 
social studies
who is sarah bagley an what is she famous for?
asked on June 9, 2010 
Jan Mann Opportunity School
three bases on a tRNA molecule that complement an mRNA codon
asked on April 24, 2010 
MATH
rewrite in distributive property 2(a+4)
asked on November 30, 2009 
american lit
What is the religious symbolism in My Antonia? How is My Antonia an American Genesis? Why might Cather have chosen to fram her narrative in this fashion? I thought it would be how at first God made nothing but land, which is what Jim saw at first and then
asked on September 2, 2009

Math
The answer is 6.3
posted on May 10, 2018 
Math
3:00
posted on May 8, 2018 
math
12
posted on April 11, 2018 
8 grade math
thanks so much.. it did help. thanks for the answers!!
posted on October 12, 2017 
physics
15 revs
posted on June 18, 2017 
Improving vocabulary
Final chech conflict over holidays 1.? 2.? 3.? 4.? 5.? 6.? 7.Benevolent 8.agnostic? 9.affiliate 10.?diversion I really need this help cuz it's my final
posted on December 4, 2016 
math
The fraction of a mix that is red paint 1/4
posted on August 30, 2016 
Math ASAP please
WHATS THE RIGHT ANSWER
posted on June 3, 2016 
Math
No
posted on May 3, 2016