# jj

Popular questions and responses by jj
1. ## 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?

2. ## Math

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

3. ## english

the speaker in birches compares the boy's climbing to

4. ## Math

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

5. ## 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 .

6. ## 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?

7. ## 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?

8. ## math

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

9. ## 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

10. ## social studies

Why do Hindus worship many different gods while believing that there is one supreme being?

11. ## 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.

12. ## 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.

13. ## cal

Differentiate the function. f(x) = sin(7 ln x)

14. ## Math

Hak Young is tired at the end of the semester and decides he really needs a break so he pays for a one week all-inclusive trip to Disney Land with his credit card. In total the trip cost \$3000 and his credit card charges 21% interest compounded monthly. He

15. ## 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?

16. ## 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

17. ## 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?

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

19. ## 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?

20. ## 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

21. ## Physics

A hockey puck slides off the edge of a table with the initial velocity of 20m/s. The table height is 2.0 m. What is the accleration of the puck right after it leaves the table?

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

23. ## Finance

Victor would like to buy his first car and the one he has his eye on is \$25,000 plus an extra 13% HST for a total price of \$28,250. The dealership has a deal for 0% down payment and charges 2.89% interest on the loan. Victor plans to make car loan payments

24. ## 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.

25. ## Algebra 2

Complex numbers are written in the form a + bi. What does i represent? -1 0 1 sqrt-1 **my choice

26. ## Trigonometry

How could you evaluate tan (13pi/12) if you did not know the sum and difference formula for tangent? Would you use the sin and cos sum and difference formulas, and if so, can someone walk me through it? Thank you!!!

28. ## 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?

29. ## 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)

30. ## social studies

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

31. ## math

two airplanes travelling in opposite directions , leave an airport at the same time. if one plane averages 480 ml/hr and the other averages 520 ml/hr, how long will it take before they are 2000 ml apart?

32. ## MATH

the numerator of a fraction is one-half the denominator! If the numerator is is increased by 2 and denominator is decreased by 2, the value of the fraction is 2/3. What is the numerator of the original fraction?

33. ## math

Given f(x)=cos(5x)on the closed interval [0,2π/5] Find the open intervals where f is concave down and the open intervals where f is concave up. Express your answers in interval notation with exact values.

34. ## 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

35. ## 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

36. ## precalc

The point (3, -4) is on the terminal side of an angle(theta) . What is cos(theta)

37. ## 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

38. ## 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

39. ## 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)

40. ## science

if the initial velocity of an object is 12m/s, determine the horizontal distance it can cover without rising more than 3m.θ=40 deg above the horizontal.

41. ## 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

42. ## math question

How do you write 1/2 as a percent?

43. ## Maths

P varies partly as q and partly as the square of r. When p=6,q=8 r=4 and when p=10,q=12 and r=5. find the formula connecting p,q and r

44. ## 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

45. ## us history

I was working on a US History crossword worksheet titled The English Colonists Arrive. I am trying to find the answer to the sole right to trade in an area. This wksht is due tomorrow.

46. ## 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

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)

48. ## chemistry

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

49. ## Physics

A 2.00-kg block of ice is at STP (0°C, 1 atm) while it melts completely to water. What is its change in entropy? (For ice, Lf = 3.34 ´ 105 J/kg)

50. ## Algebra

Kevin has \$6.45 in coins in his cash box. The numbers of quarters is one less than twice the number of dimes. The number of nickels is one less than twice the number of quarters. The value of the pennies is the same as the value of the nickels. How many of

51. ## PreCalc

The decibel (dB) is defined as dB= 10log (P2/P1), where P2 is the power of a particular signal. P1 is the power of some reference signal. In the case of sounds, the reference signal is a sound level that is just barely audible.How many dBs does a sound

52. ## science

if the initial velocity of an object is 12m/s.

53. ## Math

If the number has 6 hundreds. The tens digit has a value of 50. The ones digit is the difference between the digits in the hundreds place and tens place. What is the number?

54. ## 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

55. ## chm

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

56. ## calculus

1.) values of f(t) are given in the following table: t 0 2 4 6 8 10 f(t) 137 112 88 68 49 34 a. Does this function appear to have a positive or negative first derivative? Second derivative? * I think both derivatives are negative b. Estimate (f prime) f^'

57. ## 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

58. ## fractions, decimals,and percents

What are some uses for fractions, decimals, and percents? FIND AT LEAST 2 AND TELL WHY!

59. ## Math

mrya withdrawals the same amount of money from her checking account each week. In 4 weeks she withdraws a total of \$200. which equation represents the amount of money her account changes by each week

60. ## environmental science

the warming of the oceans causing less carbon dioxide to be soluble in them, and at the same time leaving more carbon dioxide in the atmosphere causing an increased warming of the atmosphere, is a example of a a. model of a system showing a paradigm shift.

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

62. ## 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.

63. ## 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.

64. ## math

Working together, 2 groomers can brush 8 horses in 3 hours. How many hours would it take 3 groomers to brush 12 horses at this rate?

65. ## math

In the xy-plane, lines a and b intersect at point (5,-2), and lines b and c intersect at point (-3,3). What is the slope of line b? Express your answer as a common fraction

66. ## Math

An airplane flying at a speed of about 100 mph was once overtaken and passed by a flock of sandpipers! Suppose that a flock of these birds can fly at 110 miles per hour with a certain wind and at 90 mph against it. If they fly a certain distance with the

67. ## math

Find the derivative of the function y = sqrt of s^11 + 1 the entire thing is under the square root and and 1 is not in the exponent. Is the answer 1/2 (s^11 +1)^-1/2(11s^10)?

68. ## 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

69. ## Algebra 2

Give one example of a situation where you would make a discrete graph and an example of when you will se a continuous graph.

70. ## Algebra1

Consider the point (5,7) which lies on line l in the coordinate plane. Could y=7/5x represent line l?

71. ## math

To make punch for her upcoming party, Mary used a recipe that calls for 1/2 cup of fruit juice per serving. If she has e gallons of fruit juice, what is the greatest number of servings of punch she can make? (note: 1 gallon=16 cups)

72. ## 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?

73. ## rty

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

74. ## us history

What issue needed to be settled before the smaller states agreed to the articles of confederation?. A:how to pay taxes B:ho to pay debts C;what to do with the western lands d:who got to vote

75. ## 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

76. ## 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

77. ## language

Write the verb in each sentence. Write whether the action is past, present, or future 1. A Potter adds sand to the clay (adds, present) 2. Then he rolls the clay into long, pipe-shaped pieces. (Pipe-shape, past) 3.Another potters will use a potter's wheel

78. ## chemistry

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

79. ## 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.

80. ## 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.

81. ## computer architecture

How many bits does a word of storage contain on the IBM-PC?

82. ## Math

Sheila's age is two years more than twice Nicole's age. The sum of their ages is the same as Steven's age. If Steven's age is ten years less than five times Nicole's age, ,find the age of each. Write a verbal model!

83. ## Pre-algebra

Factor the expression 14+21c

84. ## Algebra1

a company sells brass and steel machine parts. One shipment contain 3 brass and 10 steel parts and cost 48.00. A second shipment contain 7 brass and 4 steel parts and cost 54.00. Find the cost of each type of machine part. How much would a shipment

85. ## 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

86. ## chemistry

calculate how much strontium fluoride will dissolve in 1L of water given Ksp= 2.5x10^-9 at 25 degree celsius

87. ## math

If r = 7 m then d = what c = what

88. ## Math

A state creates license plates that each contain two letters followed by three digits. The first letter must be a vowel and duplicate letters and digits are allowed. How many different plates are possible?

89. ## chm

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

90. ## 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

91. ## 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:

92. ## US HSITORY

HOW DID MEXICAN INDEPENDENCE CHANGE TEXAS

93. ## us history

explain jacksons war on the bank

94. ## 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?

95. ## chemistry. am i doing this right?

1.) One of the trials in this week's experiment in chemical kinetics was determined to be 10.60 seconds. Evaluate log10(rate). log10(rate) = Would I just plug 10.60 in for the rate?

96. ## Geography- Market Areas

The GIS assumes that you will root for the team nearest you. Thus, it draws market areas based solely on the distance to the nearest baseball team. In real life, however, other factors can affect or distort the market area so that the distance is not

97. ## chemistry

radium-266 may emit a photon of light with a frequency of 4.5x 10^19 s^-1 when it undergoes nuclear fission. what is the wavelength in pm of this photon?

98. ## Transcription

I'm on the fence about apostrophe or not in the following sentence. The possessive is not coming immediately before a noun or gerund; however, the English does belong to the gentleman. I realize a noun can show ownership to a noun that may have an

99. ## Language Art

How to write goalie in a possesive form sentence