# Questions Asked onJuly 7, 2015

1. ## Algebra/Pre Calc

A parking lot charges \$3 to park a car for the first hour and \$2 per hour after that. If you use more than one parking space, the second and each subsequent car will be charged 75% of what you pay to park just one car. If you park 3 cars for t hours, which

2. ## chemistry

Consider the following reagents: zinc, copper, mercury (density: 13.6 g/mL), silver nitrate solution, nitric acid solution. a. Given a 500-mL Erlenmeyer flask and a balloon can you combine two or more of the foregoing reagents to initiate a chemical

3. ## Chemistry

Diatomic O2 can react with the element magnesium to form magnesium oxide (MgO). The balanced chemical equation is: If 4 moles of magnesium totally reacted with more than enough O2, how many moles of MgO would be expected to form?

4. ## Physics

A rope pulls on a metal box at an angle of 60.0° with a force of 255 N. The box moves horizontally for 15.0 m. How much work was done on the box? 1910 J 3310 J 255 J 3830 J

5. ## dynamics of rigid bodies

1. An elevator weighing 15 kN starts from rest and acquires an upward velocity of 3 m/sec. in a distance of 6 m. If the acceleration is constant, what is the tension in the cable? 2. A man weighing 70 kg is in an elevator moving upward with an acceleration

6. ## Chemistry

When naming a molecular compound, such as CO, would I write it as mono carbon monoxide or carbon monoxide? My textbook has the rule written as prefix+1st element prefix+2nd element, but I am not sure if the mono applies to the carbon or not.

7. ## Maths

A ball is dropped from a height of 80ft.The elasticity of this ball is such that it rebounds three-fourths of the distance it has fallen. How high does the ball rebound on the fifth bounce? Find a formula for the height the ball rebounds on the nth bounce?

8. ## Math Statistics

In the power ball lottery game, winning the jackpot requires that you select the correct five unique numbers between 1 and 58 inclusive (don't have to match the order) and, in a separate drawing, you must also select the correct single nber between 1 and

10. ## dynamics of rigid bodies

7. A 1800 kg car drives up an inclined of 8% from rest at uniform acceleration to a velocity of 60 kph after traveling 75 m. Its wheels are 3 m apart with its center of gravity midway of the wheels and 500 mm from the ground. If all frictional force is

11. ## Math

a ribbon is 40 inches long. we want to cut the ribbon into pieces, each pieces will be 2/3 of an inch. how many pieces will we have ?

12. ## casanayan national high school

How did you solve business-related problems during the early years?

13. ## Math

Changing Shapes 1.)Suppose you are going to be designing a logo for a club at your school. To prepare for this product, draw a non-rectangular shape in the coordinate plane so that portions of the shape are in each of the four quadrants. Explain what would

14. ## Physics

A particle moves in the xy plane with constant acceleration. At time zero, the particle is at x = 6.0 m, y = 3.0 m, and has velocity v = 4.0 m/s + -1.0 m/s . The acceleration is given by the vector a = 4.0 m/s2 + 0 m/s2 . (a) Find the velocity vector at t

15. ## physics

a 2000kg car travelling west with a speed of 20m/s collides at an intersection with a 3000kg car travelling south at a speed of 20m/s. find the direction and magnitude of the velocity of the wreckage after the collision, assuming the collision was

16. ## pysics

A metal box attached to a small parachute is dropped from helicopter A.explain in terms of the forces acting on why its velocity increased immediately after being dropped B.why did it reach a uniform velocity after a short distance C.the total force

17. ## physics

A 0.700 kg object is swung in a circular path and in a vertical plane on a 0.550 m length string. If the angular velocity at the bottom is 12.00 rad/s, what is the tension in the string when the object is at the bottom of the circle?

18. ## Physics

Find the tension in each of the two ropes supporting a hammock if the first one is at an angle of 19.4° above the horizontal and the second is at an angle of 35.3° above the horizontal. The person sleeping in the hammock (unconcerned about tensions and

19. ## physics

The angular speed of a rotor in a centrifuge increases from 428 to 1400 rad/s in a time of 6.26 s. (a) Obtain the angle through which the rotor turns. (b) What is the magnitude of the angular acceleration?

20. ## statistics

Unknown to a quality-control inspector, 20% of a very large shipment of electric switches are defective. The inspector has been told to reject the shipment if, in a sample of 15 switches, 2 or more are defective. The probability that the shipment will be

21. ## Chem.

Sorry if I confused you. I miss-wrote my question. My question was: How can I determine the concentration of HCl remaining in the flask. I calculated the # of moles of HCl neutralized by the tablet which was around 0.014 M. I don't understand the steps

22. ## Chemistry

How much heat is needed to convert 10g ice to 10g water vapor?

23. ## physics

A race driver has made a pit stop to refuel. After refueling, he starts from rest and leaves the pit area with an acceleration whose magnitude is 6.3 m/s2; after 4.1 s he enters the main speedway. At the same instant, another car on the speedway and

24. ## Intermediate Algebra

The amount P of pollution varies directly with the population N of people. City A has a population of 468,000 and produces 260,000 tons of pollutants. Find how many tons of pollution we should expect City B to produce, if we know that it's population is

25. ## Math

From the window of one building, Matt finds the angle of elevation of the top of a second building is 33° and the angle of depression to the bottom of the same building is 55°. The buildings are 25 meters apart. Find the height of the second building to

26. ## physics 1401!

A closed-end tube is evacuated and placed with its open end beneath the surface of a reservoir of water. The water rises to a height of 9.5 m. If the density of water is 1000 kg/m^3, what is the pressure at the bottom of the column of water?

27. ## science

Calculate the energy required to vaporize 50g of water initially at 80¡ãC. ( specific heat capacity of water- 12jgk, specific heat of vaporization- 220jk

28. ## Chem.

How can I determine the concentration of HCl remaining in the flask after back titration? Thank you!! I have been given weight of antacid, concentration and volume of HCl and concentration of NaOH. I've done 3 trials and found the average volume of NaOH.

29. ## Math statistics

For a certain computer program a password must be exactly 5 characters long. The first character must be a mnber 0-8, the second, third and fourth character can either be one of the 26 letters or a number 0-5, the fifth character has to be exactly the same

I want to buy a car with cash in 4 years. I have \$10,000.00 that I can invest today. I can get a bond earning 4%. How much will I have for the purchase? This is what I am thinking for an answer but not quite sure: N=4 years I=4% PV=10,000 for a total of

31. ## Math statistics

A mountain search and rescue team received an average of 600 calls per year. Use the poisson dustribution to find the probability that on a randomly selected day, they will receive 1 or more calls.

32. ## Math

Joe can type 11 words in 8 secs. at this rate, how many words can he type in two minutes ?

33. ## chemistry

The edge length of face centered unit cubic cell is 508pm.if the radius of the cation is 110 pm,the radius of anion is

34. ## Maths

Find the first four terms in the binomial expansion of (1+x)^(1/5) and state the range of values of x for which this expansion is valid.Hence approximate (31)^(1/5) correct to four decimal places.

35. ## chemistry

A piece of iron (Cp = 0.450 J/(gi°C)) that has a mass of 21.5 g and an initial temperature of 100.0°C is submerged in X g of water (Cp = 4.184 J/(gi°C)) at 20.0°C. The temperature of the system (iron and water) changes to 21.4°C. What is the value of

36. ## chemistry

Treatment with sodium borohydride converts aldosterone A in to an optically inactive alditol. Ruff degradation of A from B, whose alditol is optically inactive. Ruff degradation of B from D - glycerol dehydration. Identify A and B

37. ## PHYSICS PLS HELP

A falling 50-kg skydiver experiences an upward acceleration of 6.2 m/s2 when she opens her parachute. Show (by calculation) how much drag force is produced by the parachute.

38. ## Grammar

Please tell me the verb in the following sentences 1) my aunt is the author of a comic strip? 2) her office is a busy and colorful place? 3)the characters in her strip are little animals ? 4) the sales of his newspaper were high? 5) now comics have become

39. ## Math statistics

Ten percent of Americans adults are left-handed. A statistics class has 50 students in attendance. Find the standard deviation for the number of left-handed students in such classes of 50 students

40. ## Algebra (Normal Distribution)

The mean of a normally distributed data set is 12, and the standard deviation is 2. ___% of the data points lies between 8 and 16. Find the percentage

Please tell me the adjectives in the following sentences. 1)She was blind and deaf but had some sense of touch. 2)Samuel Howe had helped countless handicapped people at Perkins inst. 3) he used unique three sided wooden letters to teach Laura words 4)

42. ## Intermediate Algebra

in 2005, 10.4 out of every 50 employees at a company were women. if there are 43,839 total company employees, estimate the number of women

43. ## math

I am 5 digit greater 60000, but less than 70000.My ones digit is less than my 10000 digit on my other digit are the same.The sum of digit is 23.What is my number

44. ## science

determine the time of evaporation of 250 ml of water in different envionmental conditions such as at room temperature

45. ## Grammar

Which word is verb in the following sentences. My aunt is the author of a comic strip Her office is a busy and colorful place. The characters in her strip are little animals. The sales of his newspaper were high. Now comics have become serious business for

46. ## statistics

Joe owns a clothing store, he keeps 15% of the shirts on display in the window. he knows if a shirt is in the window there is a 70% chance of it being sold that week. The probability that the shirt in the display window will be sold within the week is?????

47. ## math

Sam is four years younger than Jo. But in five years' time Jo will be twice Sam's age now. How old are they now?

48. ## Algebra

A Chemist needs 200 liters of 30% acid solution. she has a 20% and 50% acid solution. How much of each must she mix?

49. ## Chemistry-History-ish

Describe 3 experiments, run prior to 1930, and the types of energies/particles used to probe the structure of the atom. What did each experiment investigate? Include the names of the scientists associated with each experiment in your answer Would this be

50. ## Triginometry

From the top of the Metro Building, the angle of elevation of the top of the Gammapro Building is 24° and the angle of depression to the foot of the Gammapro Building is 56°. If the buildings are 45 m apart, determine the height of each building to the

51. ## Calculus

I have a graph of f(x) which I cant post here, but would like some help with concepts. lim f(x) = L x->a I already found the limit for different values of a. Now I need to find the value of f(a) at each point. So is f(a) = lim f(x) x->a So f(a) is just the

52. ## physics 1401!

in a capillary tube with radius of .0008 m, a liquid of density 800 kg/m^3 and surface tension of 0.038 N/m in rising makes a contact angle of 60 with the tube wall. To height does the liquid rise?

53. ## sociology

Every discipline that does research on humans needs a code of ethics in order to protect its research subjects. While it¡¦s easy to see that medical research could harm people if not carried out ethically, the risks associated with sociological research

54. ## physics

a car pulling two trailers accelerates from 10m/s to 12m/s in 10s. if the masses of the car and the trailers are respectively 2000kg, 500kg and 300kg.calculate the tension in the tow bar a)between the car and 500kg trailor b)between the 500kg and 300kg

55. ## Calculus

Find max or min: y = x * cosx

56. ## dynamics of rigid bodies

10. The flatbed truck is traveling at constant speed of 60 kph up the 15% grade when the 100 kg crate which it carries is given a shove which imparts to an initial relative velocity x = 3m/s towards the rear of the truck. If the crate slides a distance x =

57. ## ENGLISH

WHAT ARE THE 4 GENERAL STEPS IN WRITING? 1. Pre-Writing (planning stage) 2. ?? 3. ?? 4. revising and proofreading??

58. ## Algebra/ Pre Calc

The area of a circle is 78.5 square centimeters, and a subtending arc on the circle has an arc length of 6π. The estimated value of π is 3.14.

59. ## statistics

If I am using a venn diagram, the probability that event A occurs or event B occurs but not both. What is my formula? I am soooo very confused..

60. ## American History

What caused the King Philip's war? Can you briefly explain or send me some links to sites.

61. ## Physics

Which of the following is a scalar quantity? displacement perpendicular component of force parallel component of force work

62. ## Math

From the top of the Metro Building, the angle of elevation of the top of the Gammapro Building is 24° and the angle of depression to the foot of the Gammapro Building is 56°. If the buildings are 45 m apart, determine the height of each building to the

63. ## HELP PLS PHYSICS

In three scenarios a truck is towing a boat on a trailer. Using 3 – 4 complete sentences indicate which scenario(s) (if any) is the force of the truck on the trailer greater than the force of the trailer on the truck: Scenario A: masstruck = 1000 kg,

64. ## Calculus

Determine over what interval(s) is the function y=4x-6arctan(x) is concave up/concave down I took the second derivative and ended up with x=0. I do not believe I did this right. IF I happen to be right, wouldn't our answer just be undefined, rather than

65. ## Caritus girls secondary school

A metal box attached to a small parachute is dropped from helicopter A.explain in terms of the forces acting on why its velocity increased immediately after being dropped. B.why did it reach a uniform velocity after a short distance

66. ## Ucc

if 11,47,81,18,65,selected from 1-90 next selections will be what numbers

67. ## Math

My hundreds digit is 4 less than my tens my tens digit. My ten thousand digit is 6 greater than my hundreds digit. My thousands digit is 5 less than my ten thousands digit and my ones digit is 6 greater than my hundreds digit. If my tens digit is 7, what

68. ## Math

My hundreds digit is 4 less than my tens digit. My ten thousand digit is 6 greater than my hundreds digit. My thousands digit is 5 less than my ten thousands digit and my ones digit is 6 greater than my hundreds digit. If my tens digit is 7, Question: What

69. ## Math (Finite)

A calling card offers two methods of paying for a phone call. Method A charges \$0.02 per minute but has a \$0.6 connection fee. Method B charges \$0.045 per minute but has no connection fee. Write the equations that show the total cost, y, of a call of x

70. ## statistics

Average is 8500 with a standard deviation. Of 1500 with a z score of -2.98 a z score of +1.00 what are the actual bonuses

71. ## Peninsula college

Wendy is traveling 120 miles away from chasity. They are traveling towards each other. If chasity travels 4 mph faster than Wendy and they meet after 4 hours, how fast was each traveling?

72. ## Criminal Justice/Terrorism

Terrorism works well for the following reasons EXCEPT: A. it enables a small group to fight against a major power. B. it can be inexpensive to fund. C. it is a tightly knit organization of groups with the same goal. D. it creates fear and panic among a

73. ## physics

the total force opposing motion of the box and the parachute at particular time during its fall is 30N.the combined mass of the box and parachute is 5kg 1. Caculate the resultant downward force and box and the parachute (g=10N)

74. ## SCTD

Physics a satellite orbiting 3.22 times 10 to the 5th power meters above the surface of the earth get the mass of the satellite is 3.80 times 10 to the 4th kilograms what is the weight or gravitational force exerted on the satellite by the earth?

75. ## poetry

I have to analyze a poem using figure of speeches.. How do i start it. I found all the figure of speeches in the poem. but im not sure how to start my analysis...

76. ## UEW

if 89,88,45,9,33, were selected from 1-90 ,what are the next five numbers

77. ## Criminal Justice/Terrorism

Under the IMS, a SWAT team searching a building for terrorists is part of: A. management. B. operations. C. control. D. tactical. I think it's D, but not sure.

78. ## Math

Two trees in a park are 14.80 meters apart. An observer, whose eye line is 1.80 m above the ground, is standing halfway between the trees. The angles of elevation of the tops of the trees from the observer’s eye line are 17° and 23°. Determine the

79. ## chemistry

Treatment with sodium borohydride converts aldosterone A in to an optically inactive alditol. Ruff degradation of A from B, whose alditol is optically inactive. Ruff degradation of B from D - glycerol dehydration. Identify A and B.please give satisfactory

80. ## Maths

How much pure alcohol has to be added to 400ml of a solution containing 15% alcohol to change the concentration of alcohol in the mixture to 32%?

81. ## Math

If there are 6 tricycle wheels and the ratio of tricycles to the tricycle wheels is 1:3, how many tricycles are there?

82. ## physics

Suppose you moved a box across a rough horizontal surface with a 50 N force over a displacement of 10 m. If the frictional force at the interface was 10 N, how much work was done to the box?

(xD-1)D

84. ## science

what is the KE of a 0.2kg rolling ball travelling at a speed of 5m/s

85. ## Geo

Which of the following is not a valid reason in a mathematical proof?

86. ## math

graphing a line through a given point with a given slope. graph a line with slope -1 passing through the point(1, -3) Thank you just do not understand sorry.

87. ## poetry

Is "where the light falls like rain" an example of an oxymoron?

88. ## org chem

Can someone tell me.how to know the more higher rate of inductive effect? Im confused

89. ## Chemistry

Explain the basic format and the steps needed to name an ionic compound composed of a cation that has a possibility of existing in more than one oxidation state. Is this right: There are four prefixes used when naming ionic compounds: per__ate, -ate, -ite,

90. ## ECO 372

Aggregate demand management policies are designed most directly to?

91. ## English

What does "articulated with characteristic eloquence" mean? Thanks.