jj

Most popular questions and responses by jj
1. Language arts

asked on June 6, 2016
2. physics

You are trying to ﬁnd out how high you have to pitch a water balloon in order for it to burst when it hits the ground. You discover that the balloon bursts when you have pitched it to a height of 14 m. With what velocity did the balloon hit the ground?

asked on October 2, 2011
3. social studies

based in the information on the map what can you infer about the industry in the united states? here is the link to the image.

asked on December 13, 2018
4. science

Thermal energy is caused by motion of? 1. mixing water molecules contained in a beaker 2. molecules in soild liquid and gas phases 3. mixing molecules together 4. molecules that have reached equilibrium the density of an object with the volume of 60.0 mL

asked on May 2, 2016
5. math

What is the value of 14 – a2 given a = –3?

asked on September 12, 2017
6. language arts

Joe magarac, Man of steel 8. In section 1, what does the author mean when he says joe magarac is a folk hero? A. Joe was a real man who spent his whole life in the steel mills of Pittsburgh. B. Joe was a mysterious figure who vanished without a trace.* C.

asked on June 2, 2016
7. Social studies connexus 8th grade

The Underground Railroad used escape routes that went throughout the South. Based on that fact, which of the following conclusions could be made? I could use some help here can anyone help me give me an answer or a link of some sort? Thanks

asked on November 15, 2016
8. physics

Vector vector A has a magnitude of 27 units and points in the positive y-direction. When vector vector B is added to vector A , the resultant vector vector A + vector B points in the negative y-direction with a magnitude of 18 units. Find the magnitude of

asked on February 10, 2011
9. Math

Write and simplify the polynomial represented by the model. (Model shows: 3 big blank squares, 2 long black rectangles, 3 small blank squares, 1 big black square, 6 small black squares) a. -2x^2 + 2x + 3 b. 2x^2 - 2x - 3 c. 3x^2 - 2x - 3 d. 2x^2 - 2x + 3

asked on May 10, 2016
10. 2nd grade math

Show how to make one addend the next tens number. Complete the new addition sentence 26+27=? Is it 53 (10+43=53)

asked on October 4, 2016
11. english

the speaker in birches compares the boy's climbing to

asked on October 21, 2014
12. Math

Find the digit that makes blank 2440 divisible by 9 test help im behind allot help.

asked on October 11, 2017
13. Math

which polynomial does the model represent (Model shows: 1 big black square, 2 long blank rectangles, 3 long rectangles, 3 small blank squares, 1 small blank square) a.) -x^3+2x^2-3x+2 b.)x^2+x-2 c.)-x^2-x+2 d.)-x^2+x-2

asked on May 10, 2016
14. Science test review

Here are all the word you can use I need help chemical property mixture heat capasity homogeneous viscosity sublimitation physical property compound chemical formula substance density mass tempurature pressure heterogenerous 14. A property of matter

asked on May 2, 2016
15. Calculus

The length of a rectangle is increasing at a rate of 9 cm/s and its width is increasing at a rate of 7 cm/s. When the length is 15 cm and the width is 10 cm, how fast is the area of the rectangle increasing?

asked on November 9, 2010
16. Physics

A 10-kg piece of aluminum (which has a specific heat of 900 J/kg×°C) is warmed so that its temperature increases by 5.0 C°. How much heat was transferred into it?

asked on December 19, 2010
17. science

kendra was looking at recipes in a cookbook. she divided some of the steps of a recipe into two columns. How would you label each column? A.) Column A shows sublimation; column B shows vaporization B.) Column A shows vaporization; column B shows

asked on May 2, 2016
18. social study

why were the islands shown on this map most likely acquired or annexed by the united states

asked on April 20, 2017
19. Physics

A 1340-kg car traveling east at 13.6 m/s (20 mi/h) has a head-on collision with a 1930-kg car traveling west at 20.5 m/s (30 mi/h). If the collision time is 0.10 s, what is the force needed to restrain a 68-kg person in the smaller car? In the larger car?

asked on November 14, 2016
20. Physics

Two passenger trains are passing each other on adjacent tracks. Train A is moving east with a speed of 35.5 m/s, and train B is traveling west with a speed of 33.4 m/s. (a) What is the velocity (taking due east to be the positive direction) of train A as

asked on September 11, 2015
21. Statistic

I’m having problems creating the flow chart, so I am unable to insert the numbers. This is what I have done this far, and I’m not sure if I’m accurate with the calculations. (1) A school cafeteria is operated by five persons performing the activities

asked on October 6, 2012
22. physics

Judy, by chance, spots a potted plant falling outside the window at 2.04 m/s . Further down the same building, Judy’s boyfriend clocks the pot at 56 m/s . How far apart are the friends? The acceleration of gravity is 9.8 m/s 2 .

asked on October 2, 2011
23. science

how do liquid water, ice, and water vapor differ from one another? A.) They are different states of matter B.) They are different compounds C.) They are made of different kinds of molecules. D.) They are mad of different kinds of atoms.

asked on May 2, 2016
24. Physics

A boy kicks a football with an initial velocity of 20 m/s at an angle of 30 above the horizontal. What is the vertical component of it's velocity at the highest point of it's trajectory?

asked on November 6, 2011
25. math

Suzanna does not have a ruler but she has a several books that is 17 centimeters tall. Suzanna lays the books end to end and finds tat the board is the same length as 21 books. How many centimeters long is the board

asked on December 14, 2014
26. English (Checking please)

According to the author, it is difficult for people to comprehend what when on at Auschwitz because the events are so terrible that readers have never experienced anything similar.

asked on May 21, 2014
27. Physics

A circus performer begins his act by walking out along a nearly horizontal high wire. He slips and falls to the safety net, 25.0 ft below. The magnitude of his displacement from the beginning of the walk to the net is 26.7 ft. (a) How far out along the

asked on December 28, 2012

BC=3x+2 and CD= 5x-10. Solve for x.

asked on October 30, 2010
29. chemisty

Find the volume of a starburst candy (220 cm cubed). The mass is 5.14 grams. Calculate it's density. How many starburst would it take to fill your locker (139,200 cm cubed)? Use dimensional analysis to solve this problem.

asked on September 8, 2013
30. akgebra

One pipe can fill a tank in 20 minutes, while another takes 30 minutes to fill the same tank. How long would it take the two pipes together to fill the tank?

asked on April 24, 2013
31. chemistry

If 50.0 mL of 0.150 M magnesium bromide is combined with 200 mL of 0.110 M sodium bromide what is the molarity of the bromide ion in the resulting solution? (assume volumes are additive)

asked on February 8, 2013
32. physics

A particle of mass 7.7 × 10-8 kg and charge +11 μC is traveling due east. It enters perpendicularly a magnetic field whose magnitude is 4.2 T. After entering the field, the particle completes one-half of a circle and exits the field traveling due west.

asked on October 12, 2014
33. physics

A chair of weight 150 lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of = 36.0 directed at an angle of 40.0 below the horizontal and the chair slides along the floor.Using Newton's laws, calculate , the

asked on December 14, 2009
34. Social studies

Brazil's history Research events that occurred during each time period 1800 - 1950. I need at least 5 events that occurred 1800 through 1950. Increments of time to use. I need each event to be 5-8 sentences. Ms. Sue OR Write teacher Any links would be

asked on December 10, 2018
35. Calculus

A sign 3 feet high is placed on a wall with its base 2 feet above the eye level of a woman attempting to read it. How far from the wall should she stand to get the best view of the sign, that is, so that the angle subtended at the woman’s eye by the sign

asked on July 11, 2010
36. Math

At the beginning of 2000 (t=0), women's wages were 68% of men's wages and by the beginning of 2013 (t=0), women's wages were 68% of men's wages. If this gap between women's and men's wages continues to narrow linearly, then what percentage of men's wages

asked on August 29, 2019
37. physics

A chair of weight 150 lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of = 36.0 directed at an angle of 40.0 below the horizontal and the chair slides along the floor.Using Newton's laws, calculate , the

asked on December 14, 2009
38. Calculus

related rates: a ladder, 12 feet long, is leaning against a wall. if the foot of the ladder slides away from the wall along level ground,what is the rate of change of the top of the ladder with respect to the distance of the foot of the ladder from the

asked on January 9, 2008
39. math

There are some frogs and some lily pads at a pond. If lily pads with frogs on them have two frogs each, then there is one lily pad with no frogs on it. If each lily pad has exactly one frog on it, then there is a frog with no lily pad. How many frogs are

asked on August 25, 2013

What are the proceeds of a note for \$5,500 at a discount rate of 8%, for 30 months?

asked on November 3, 2013
41. algebra

An object that is projected straight downward with initial velocity v feet per second travels a distance s vt 16t 2 =+ , where t =time in seconds. If Ramón is standing on a balcony 84 feet above the ground and throws a penny straight down with an initial

asked on April 24, 2013
42. Math

find p so that the numbers 7p+2, 5p+12, 2p-1...... form an arithmetic sequence

asked on January 29, 2016
43. Statistics

A national opinion poll found that 44% of all American adults agree that parents should be given vouchers good for education at any public or private school of their choice. Suppose that in fact the population proportion who feel this way is p=0.44. A)

asked on December 17, 2013
44. Chemistry

A piston is holding 125 mL of gases at a temperature of 300 K and a pressure of 2.39 atm. What is the volume of the gases if the temperature is increased to 500K and the pressure falls to 2.15 atm?

asked on February 15, 2014
45. Biology

Suppose in a breeding experiment, you combined 7,000 AA individuals and 3,000 aa individuals, and they mated randomly. After the first generation, what would be the value of p2 (p squared) ? of q2 (q squared)? of 2 pq? what would be the value after the

asked on January 4, 2011
46. rty

april, bill, candace and bobby are to be seated at random in a row of 6 chairs

asked on April 24, 2013
47. physics

Water flows in a cylindrical, horizontal pipe. As the pipe widens to twice its initial diameter the pressure in the pipe changes. Calculate the change in pressure between the wide and narrow regions of the pipe. Give your answer as an expression in terms

asked on January 14, 2010
48. physics

A 25 gram arrow fired from a bow has a speed of 80m/s. The energy in the arrow came from work done by the bow that acted over a 1m "draw" distance. What average force acted on the arrow over this distance?

asked on April 23, 2015
49. algebra

Suppose y varies directly with x. Write an equation relating x and y. 645-09-05-00-00_files/i0130000.jpg a. y = 6x c. y = 7x b. y = x d. y = − x

asked on November 6, 2014
50. social studies

1. What was the first PERMANENT European colony in North America? hope someone can help!!

asked on October 27, 2010
51. Math

Explain how you can use a straightedge and a compass to construct an angle that is both congruent and adjacent to a given angle.

asked on August 31, 2015
52. Math

At a unit price of \$55, the quantity demanded of a certain commodity is 1000 units. At a unit price of \$85, the demand drops to 600. What quantity would be demanded if the commodity was free? (I worked out the problem and came up with the equation

asked on August 31, 2019
53. Science

You digestive system has three main functions: digestion, absorption, and elimination. In which organ does absorption begin? A. Mouth*** B. Stomach C. Small Intestine D. Gall bladder

asked on April 6, 2017
54. chemistry

if 3.15g of mercury are thermally decomposed to mercury and oxygen what mass of mercury will be produced and how many oxygen molecules will be produced [hg=208,o=16]

asked on December 30, 2016
55. chemistry

calculate how many mL of 6M HCL are needed to prepare 100mL HCL solution with a concentration of ~1M?

asked on October 10, 2011
56. p.e.

without this system in your body you would really get sick because toxins and wastes would build up. 1. cardiovascular 2. excretory 3. intugumentary **** 4. muscular

asked on November 27, 2017
57. chemistry

what is the binding energy of an electron in a photosensitive metal (in kj/mol) if the minimum frequency of light that can eject electrons from the metal is 6.3 x 20^14 Hz?

asked on November 7, 2011
58. math, functions

Suppliers of a certain brand of digital voice recorders will make 10,000 available in the market if the unit price is \$45. At a unit price of \$50, 20,000 units will be made available. Assuming that the relationship between the unit price and the quantity

asked on September 1, 2019
59. Physics

If a 1000-kg car was moving at 30 m/s, what would be its kinetic energy expressed in the unusual (for kinetic energy) units of calories? (1 cal = 4.186 J)

asked on December 19, 2010
60. physics

For the one dimensional motion of an object along an axis, choose all the statements that are True. 1.) If the object reverses direction and goes the opposite way, the sign of the velocity changes. 2.) If the acceleration has the opposite sign than the

asked on September 6, 2012
61. help check grammars and comments, thank you

-identify a major social problem -analyze and comment upon the effects of the chosen social problem -use historical documents to analyze the effects of the chosen social problem during the time. (does my essay off topic?) During the eighteenth century and

asked on January 24, 2007
62. statistics

For the data in question 13, find the raw scores that correspond to the following: (a) z 5 11.22; (b) z 5 20.48.

asked on October 12, 2014
63. math

In the election 46% of the class voted for Celina. If there are 50 members in the class, how many votes did Celina receive?

asked on November 8, 2012
64. Chemistry: Freezing point

An aqueous solution is prepared by dissolving 1.08 g of human serum albumin, a protein obtained from blood plasma, in 50.0 mL of water. The solution has an osmotic pressure of 0.00770 atm at 298 K. What is the molar mass of the albumin? Answer: 6.86 x 10^4

asked on February 25, 2013
65. english

(jacob and jacob was discussing) the rgument during the debate. is the underlined corrected as jacob and jacob discussed

asked on February 13, 2013
66. Economics

The index most widely used by the government and the private sector to measure changes in the cost of living is the (a) the GDP deflator, (b) Producer Price Index, (c) The interest rate, (d) Consumer Price Index

asked on November 9, 2011
67. Chemistry

Calculate [OH−] for 1.90mL of 0.190M NaOH diluted to 1.50L .

asked on February 25, 2014
68. chm

If a neutral element has 8 neutrons and 7 electrons, which expression correctly identifies the element?

asked on February 27, 2013
69. history - greece

essay question is: the golden age of classical greece (500-323 BC) is the first great age of humanism in the evolution of western civilization. if this is true, how might we account for its development in the greek renaissance (800-500 BCE)? Show how the

asked on October 10, 2007
70. chm

Why are the atomic masses listed in the periodic table not whole numbers? Answer Scientists have yet to make the precise measurements. That would be too much of a coincidence. ??>>The atomic masses are average atomic masses. or >>Today's instruments are

asked on February 23, 2013
71. VERY URGENT math question

Owen was stacking popcorn balls on a table. He put sixteen balls on the table. He added three more layers. Each layer had four fewer balls than the previous layer. How many popcorn balls in all did Owen put on the table?

asked on November 7, 2012

Find the amount of the principal on a loan at 6% interest for 274 days if the interest was \$68.50, using the ordinary interest method. (Round to the nearest whole dollar amount)

asked on November 3, 2013
73. math

The heights of the five starters of a college basketball team are 6'6, 6'7, 6'9, 6'11 and 7'. What it the mean height of these players , in inches?

asked on August 25, 2013
74. chem

a piece of (density= 10.5 g/ml)dropped into water displaces 21.56 ml of water. what is the mass (in grams) of this piece of silver?

asked on September 27, 2011
75. environmental science

1. which of the below is an example of high-quality matter found near the earth's surface? a. natural gas b. mine tailings c. bauxite (al ore) d. recyclable materials in a landfill e. nitrogen gas in the atmosphere

asked on October 12, 2016
76. physics

A toy cannon fires a .11 kg shell with initial velocity vi=10m/s in the direction 52 degrees above the horizontal. The shell's trajectory curves downward because of gravity, so that time t=.61 s the shell is below the straight line by some vertical

asked on October 12, 2012

1) Two cars travel in the same direction along a straight road. The figure below shows the velocity, V, of each car at time t. Car B starts 3 hours after car A and car B reaches a maximum velocity of 40 km/hr. a. For approximately how long does each car

asked on March 13, 2012
78. chemistry

How many moles of chloroethylene contain 5.47×10^26 molecules?

asked on April 22, 2011
79. Math, linear functions

For linear function world problems, I have no trouble finding the slope. What I would like to know is when you look for the y intercept how do you know when you should use the point slope form?

asked on August 31, 2019
80. chm

Which of the following is a covalent compound composed of nonpolar covalent bonds? Answer >>H2 H2O CF4 CH4 NaF

asked on February 26, 2013
81. Calculus

Application of Derivatives and Integrals: A sign 3 feet high is placed on a wall with its base 2 feet above the eye level of a woman attempting to read it. How far from the wall should she stand to get the best view of the sign, that is, so that the angle

asked on July 11, 2010
82. History

Which group is most associated with the fall of the Western Roman empire? Was it Carthaginians, Gauls, Huns, or the Greeks?? I thought it was Egypt or Visigoths but my answer came back as wrong :(

asked on October 1, 2013
83. physics

A 1200 kg car on a horizontal surface starts from rest and accelerates uniformly to 72 km/h in 20.0 s. Friction exets an average force of 450 N on the car during this time. a) what is the net work done on the car b) how far does the car move during this

asked on September 28, 2011
84. Chemistry

What is the final temperature after a 21.8 g piece of ice is placed into a styrofoam cup containing 114 g of hot water at 68.2 degrees C. Please explain because I don't even understand how to start.

asked on October 5, 2011
85. Math

A study investigated whether injecting mice with a certain hormone would affect the time it takes them to learn a task. Learning times of 12 mice with the hormone injected were compared with those of 12 mice without the hormone injected. The mean of the

asked on October 1, 2019
86. math To MS.SUE

Ms sue i really want a hundred percent on one algebra test im in algebra and im so smart and good at math but the thing is in my class we tooken 4 tests and on all of then i only got one wrong whit the most minor common mistake i don't understand just one

asked on December 16, 2012
87. Physics

A puddle holds 150 g of water. If 0.50 g of water evaporates from the surface, what is the approximate temperature change of the remaining water? (Lv = 540 cal/g)

asked on December 19, 2010
88. Math

Can someone check if I'm correct please. 13 + w/7 = -18 (7)13+(7)w/7= (7)-18 91 + w = -126 91-91 + w = (91)-126 w = 217 Thanks!

asked on January 28, 2019
89. pyhsics

A man drops a rock off the side of a cliff, and hears it hit the bottom 2.8 seconds later. If the average speed of sound is 335 m/s, how high is the cliff? I have been able to figure out this much, but I don't know how to solve the problem with the data

asked on October 24, 2014
90. Math 1

write an equation that represents the following situation. Let x= the number of adults. Your equatin should start with "1220=" and use x as the only variable.. The number of students attending the fall play was 150 more than the number of adults attending.

asked on October 1, 2014
91. Algebra

During a science experiment, Nico created a 32%alcohol solution by mixing 8 fluid ounces of a 50% alcohol solution with a certain amount of an 8% alcohol solution. How many fluid ounces of the 32% alcohol solution did he create?

asked on November 4, 2016
92. Physics

The electric field at a distance of 0.150 m from the surface of a solid insulating sphere with radius 0.367 m is 1720 N/C . Assuming the sphere's charge is uniformly distributed, what is the charge density inside it? Calculate the electric field inside the

asked on October 3, 2015
93. econ

Suppose the country of Maverick has specialized in the production of a good but has not yet entered into trade. At this point in time, Maverick has A. Moved to a level of production outside its production possibilities curve. B. Shifted its production

asked on May 8, 2012
94. Math

On which interval is log(5 – x) negative?

asked on October 1, 2019
95. environmental science

Ecologists designed an experiment to determine if nitrates or phosphates are more limiting to algae growth. They divided a lake in Canada into two equal-sized sections by a vinyl curtain. Then they fertilized each sub-basin of the lake, one with nitrates

asked on October 12, 2016
96. math

ben has 15 puzzles and 27 cds, when he takes a trip he likes to bring one puzzle and one cd as entertainment. how many trips can he take with a different puzzle and cd pair?? and please show how to solve it.....

asked on October 28, 2013
97. java programming

Provide a class called Letter for authoring a simple letter. The letter class has three data fields, the name of the sender, the name of the recipient, a body of the letter. 1. Supply the class constructors (default , and overloaded ) 2. Supply a method.

asked on January 20, 2011
98. math

find counterexample the quotient of two proper fractions is a proper fraction

asked on August 18, 2009
99. Chemistry

A 1.065-g sample of an unknown substance is dissolved in 30.00 g of benzene; the freezing point of the solution is 4.25 degrees C. The compound is 50.69% C, 4.23% H, and 45.08% O by mass. Info you might need on benzene: Normal Freezing point,degrees C:

asked on February 25, 2013
100. Physics

There are four charges, each with a magnitude of 2.65 microcoulombs. Two are positive and two are negative. The charges are fixed to the corners of a 0.408-m square, one to a corner, in such a way that the net force on any charge is directed toward the

asked on July 18, 2012

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