Lindsey

Most popular questions and responses by Lindsey

I give medals and 'best answer' :) I need help asap! Which of the following is one way to assess whether or not a learning game is effective? a. Being able to win the game b. doing a quiz before and after the game to see what you have learned c. Making it

2. physics

A bike first accelerates from 0.0 m/s to 5.0 m/s in 4.5 s, then continues at this constant speed for another 4.5 s. What is the total distance traveled by the bike?

3. chemistry

Suppose you are asked to find the area of a rectangle that is 2.1-cm \rm cm wide by 5.6-cm \rm cm long. Your calculator answer would be 11.76 cm 2 \rm cm^2 . Now suppose you are asked to enter the answer to two significant figures. (Note that if you do not

40. math

If you need 240 oz of paint to cover 1200 in. How much paint do you need to cover 2000 in.?

41. physics

a child is twirling a 0.0120 kg ball on a string in a horizontal circle whose radius is 0.100m. The ball travels once around the circle in 0.500s. Determine the centripetal force acting on the ball

42. Algebra

Which property is illustrated by 45 + 19 = 19 + 45? A. Commutative property of addition B. Identity property of Addition C. Associative property of addition D. zero property of addition

Warnock Inc is considering a project that has the following cash flow and WACC Data What is the projects NPV ?note THAT a projects NPV Can be negative in which case it will be rejected . WACC 10.00% year 0 1 2 3 Cash Flows -825 500 400 300 I get C but i am

44. Physics

A 5 kg block is pushed up a 37 degree incline given an initial velocity of 2 m/s at the base of a frictionless plane. The maximum vertical displacement of the block is nearly what?

45. Pre-Algebra

problem: Dena borrowed $7500 to buy a used car. The credit union charged 9%(percent it looks kind of funny) simple intrest per year. She paid$2025 in interest. For what period of time did she borrow the money. It would be 3 years. Get how much they charge

46. Physics

~I got a and b right but c i can't figure out Freight trains can produce only relatively small acceleration and decelerations. (a) What is the final velocity of a freight train that accelerates at a rate of 0.0600 m/s2 for 8.00 min, starting with an

47. Physics

Two objects are connected by a light string that passes over a frictionless pulley as in the fi gure. One object lies on a frictionless, smooth incline. In the figure, m1 = 8.48 kg, m2 = 4.84 kg, and  theta = 40.2 degrees . When we let go of the mass m1,

48. Chemistry I

Instant cold packs, often used to ice athletic injuries on the field, contain ammonium nitrate and water separated by a thin plastic divider. When the divider is broken, the ammonium nitrate dissolves according to the following endothermic reaction: In

49. Physics

A football punter accelerates a football from rest to a speed of 9.1 m/s during the time in which his toe is in contact with the ball (about 0.247 s). If the football has a mass of 484 g, what average force does the punter exert on the ball?

50. physics

A 0.36 kg soccer ball approaches a player horizontally with a velocity of 18 m/s to the north. The player strikes the ball and causes it to move in the opposite direction with a velocity of 21 m/s. What impulse was delivered to the ball by the player?

51. Chemistry

Suppose MgSe(a=545 pm) and SrSe (a=623 pm) both crystallize with a NaCl (rock salt) structure. Calculate the ionic radius of Sr2+ (Hint:Assume that the Se2- ions actually touch in MgSe.)

52. Chemistry

Given the unbalanced equation: (NH4)2 CO3-> NH3 + CO2 + H2O Calculate the mass of ammonia gas that is produced if 1.25g of ammonium carbonate decomposes completely.

53. Math Quantitive Reasoning

The amount of Jen's monthly phone bill is normally distributed with a mean of $50 and a standard deviation of$12. What percentage of her phone bills are between $14 and$86?

54. English

In Lord of the Flies, why is Percival unable to remember his name and address? Also here: http://www.novelguide.com/novellist.asp?sortby=Title&char=L and here: http://en.wikipedia.org/wiki/Lord_of_the_flies

55. physics

A scale is marked off in centimeters on a long table. A coin initially at the position labeled 130.0 is moved to the position marked -20.0. What is the displacement of the coin?

56. Science

the number of grams of CuSo4 times 5 H2O that will dissolve in 100g of H20 at 100 degrees

57. Physics 1

A meter stick has a mass of 200g and its center of gravity is at the 50.0 cm mark. If 150g is attached to the stick at the 10 cm mark, where would an upward force on the stick need to be placed to balance the stick and the added mass?

58. Physical Science

Identify these functions galvanometer step-up transformer electric motor generator electromagnet step-down transformer commutator

59. A/P Calculus

A cyclist is riding on a path whose elevation is modeled by the function F(X)=0.2x where x and f(x) arte measured in miles. Find the rate of change of elevation when x=5. ? Supposed answer: ?? 1

60. Chemistry

Calculate how many moles of products(s) would be produced if 0.500 mole of the first reactant were to react completely. BaCl2 + 2AgNO3 --> 2AgCl +Ba(NO3)2

61. physics

In preparing to shoot an arrow, an archer pulls a bowstring back 0.49 m by exerting a force that increases uniformly from 0 to 277 N. What is the equivalent spring constant of the bow?

62. PHysics

The sound emitted by bats has a wavelength of 3.45 mm. What is the frequency in air? The speed of sound in air is 343 m/s.

63. Chemistry

Consider: C6H12)6 + 6O2-> 6CO2 + 6H2O + Energy a)If I have 90 grams glucose and all is consumed by oxygen, then how many grams of water will be produced? b)How many grams of oxygen will be consumed? c)How many grams of sugar will be burned off if 85 grams

A 5-kg rock is lifted 2 meters in 5 seconds. How much work is done? How much power is done?

65. Physics

The work done by an external force on an electron as it moves from point A to point B is 6.3 × 10-14 J. If it was started from rest and had 3 × 10-14 J of kinetic energy when it reached B, what is the potential difference VB-VA?

66. Math

A $10,000 loan is to be amortized for 10 years with quarterly payments of$349.72. If the interest rate is 7%, compounded quarterly, what is the unpaid balance immediately after the sixth payment? (Round your answer to the nearest cent.)

67. trig

find all sets of three consecutive odd integers whose sum is greater than 54 and less than 63

68. Elem Algebra

solve the formula for specified variable V=BQT for B B = ____

69. chemistry

What are the monomers of aspartame? I can only get one, which is methan ol, but what are the others?

Bertrand collects movie posters. The number of movie posters in his collection changes each month as he buys and sells posters. The table show how many posters he brought or sold in the given months. January sold 20, February bought 12, March bought 22,

71. Statistics

Suppose a data set has a linear regression line of y = 6 -0.8x. If the mean of the x's is 5, what is the mean of the y's? 2 5 10 6 None of the above

72. Chem

Determine the mass of iron heated to 85 Celsius to add to 54.0g of ice to produce water at 12.5 Celsius. The speciic heat of iron is 0.045J/g C What steps do I take to solve this problem? Thanks

73. Chemistry

i need help. Calculate the pH of a 0.24 M CoCl3 solution. The Ka value for Co(H2O)63+ is 1.0 10-5. how do u do these with like the Cl there?

74. Physical Science

Fill in the blanks using the correct term from the list below. Active Combustion free heating systems passive heat pump thermal energy stroke 1. A house with large windows on its south side and few windows on its other sides probably uses a(n) Blank solar

1. You are the head researcher on a study that is tracking vocational preferences from high school through middle adulthood. List the steps you would take in selecting the sample to be used in the study. 2. A researcher decides to give a questionnaire on

76. physics

Human blood contains plasma, platelets, and blood cells. To separate the plasma from other components, centrifugation is used. Effective centrifugation requires subjecting blood to an acceleration of 2000g or more. In this situation, assume that blood is

77. math

The only part of the height equation that we have not discussed is the constant. You have probably noticed that the constant is always equal to the initial height of the ball (80 m in our previous exercises). Now, let’s have you develop a height

78. English

In the book Lord of the Flies what is the irony of Samneric's behavior? www.sparknotes.com/lit This is a good place to look up information about a variety of books normally used in classrooms across the country and abroad. You might check out the

91. chemistry

The correct interpretation of the equation below is: Fe3+(aq) + SCN–(aq) --> and

92. Algebra 1

Identify the initial amount a and the decay factor b in each exponential function. 1.) y= 0.1* 0.9^x

93. chemistry

In Europe, gasoline efficiency is measured in km/L. If your car's gas mileage is 38.0mi/gal , how many liters of gasoline would you need to buy to complete a 142-km trip in Europe? Use the following conversions: 1km=0.6214mi and 1gal=3.78L.

94. Algebra

A 30-pack of blank CDs costs $9.50. A 50-pack of blank CDs costs$13. How can you tell which is the better buy?

95. Chemistry

A limiting reactants problem. 6.32g of sodium sulfate is reacted with 12.03g of barium nitrate. How many grams of the precipitate would you expect to collect. The answer my teacher gave me is 16.0g BaSO4, but I cannot get it. The equation I formed is:

96. chemistry

if an organic liquid has a density of 1.11 g/mL and has a measured volume of 500. mL, what mass of liquid is present?

97. physics

You are designing a centrifuge to spin at a rate of 13,880 rev/min. (a) Calculate the maximum centripetal acceleration that a test-tube sample held in the centrifuge arm 14.6 cm from the rotation axis must withstand. (b) It takes 1 min, 17 s for the

98. geometry

Remove the radical from the denominator below. Do not simplify the answer. -2 sqrt15 / (6- sqrt13)

99. Algebra 1

solve each system by substitution. check your answers 4y +3 = 3y +x and 2x +4y =18