karina

Most popular questions and responses by karina
1. 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

2. 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

3. health

The breathing process is controlled by (Select all that apply) A. The diaphragm B. The pharynx C. Blood vessels D. rib muscles

4. 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

5. 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

6. 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?

7. 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.

8. 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

9. 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)

10. geometry

which point is the midpoint of AE if A=-6, B=-4, C=-2, D=1, E=8

11. 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

12. 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

13. 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?

14. 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.

15. 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

16. 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

17. 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

18. 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

19. 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

20. 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

21. science

i need an acrostic poem of the word eukaryotic

22. Physics

A car's bumper is designed to withstand a 6.84-km/h (1.9-m/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

23. 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 .

24. 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?

25. 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?

26. 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

27. 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?

28. 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

Using Heisenberg's uncertainty principle, calculate the uncertainty in the position of the following. a 1.32-mg 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

30. 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

31. CHEMISTRY AP

Using Heisenberg's uncertainty principle, calculate the uncertainty in the position of the following. a 1.32-mg 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 2.48e-29 its wrong..and since

32. math

Suppose you want to row your boat across a 3-mile-wide 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?

33. CJ 216

Discuss the possible communication methods between the officer and his/her agency.

34. 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,

35. 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?

36. 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?

37. 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?

38. math

The product of two consecutive integers is two hundred forty. Find the two integers.

39. 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

40. 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

41. english

which river flows into the gulf of mexico?

42. english

some times the number of electors for a particular states change what can be the cause for that change?

43. 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?

44. pre cal

if a 22 inch tire rotates 40 times per 2 minutes, determine the linear and angular speed of the tire.

45. engllish

how are united states and canida alike in terms of farming and maniufacturing?

46. english

which seven counteries are located in central america?

47. english

which twoo counteries are farthest south?

48. algebra

Consider making a four-digit 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

49. 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

50. biology

what is cell history

51. Chemistry

A chemical reaction produces 3.75 L of chlorine gas at STP. How many moles of chlorine are produced by the reaction?

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?

53. 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

Why might the study of identical (monozygotic) twins be valuable in constructing a model of abnormal behavior? How would dizygotic twins be different?

55. 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.

56. pre cal

If an 22-inch tire rotates 40 times per 2 minute, determine th elinear and angular speed of the tire.

WHAT IS BASE

58. 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,

59. Chemistry

How many moles of calcium carbonate, CaCO3, are in 1.500 L of a 0.40M calcium carbonate solution?

60. 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?

61. Chemistry

How many grams of sodium hydroxide, NAOH, are needed to make up 580 ml of 1.50M sodium hydroxide solution?

62. Math

What statement makes this true? 9^-2 A.81 B.18 C.1/81 D.-1/81 Is it A?

63. Math

What is 6(a+7) when a=8

64. algebra

A fair six-sided 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

65. 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)

66. COLLEGE ALGEBRA

Solve by completing the square 12x^2+11x=5

67. Science

Explain- how would the gravitational force between Earth and the Moon change if the distance between them increased?

68. 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?

69. Politics

Whats is an example of a change in political relations between powers that was in part the result of a change in discourse?

70. 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?

71. 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 ?

72. math

simplify 4 root of 500 over 4 root of 5 show work

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!

74. Statistics

What critical value for z would be used to test the hypotheses: H0:μ≤10 and Ha:μ>10, for α = 0.05 ?

75. math/linear

4x + 5 = 2x + 19.. need to break down into coins and pouches. Need to know how many coins in each pouch.

76. 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

77. 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

78. COLLEGE ALGEBRA ..HELP!

Solve by completing the square 12x^2+11x=5

79. math

how you could show five less than a number using a expression

2/5 of 15=?

81. 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.

82. literature

what is an oral language piece?

83. Math

How do you find a perimeter

84. social studies

who is sarah bagley an what is she famous for?

85. Jan Mann Opportunity School

three bases on a tRNA molecule that complement an mRNA codon

86. MATH

rewrite in distributive property 2(a+4)

87. 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

88. 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

89. english

Ok, it says that I need to find a news report about a non-violent 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

90. 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.

what does a feet equal?

1. Math

posted on May 10, 2018
2. Math

3:00

posted on May 8, 2018
3. math

12

posted on April 11, 2018

thanks so much.. it did help. thanks for the answers!!

posted on October 12, 2017
5. physics

15 revs

posted on June 18, 2017
6. 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
7. math

The fraction of a mix that is red paint 1/4

posted on August 30, 2016