# Questions Asked onJanuary 12, 2015

1. ## chemistry

Write a balanced equation, ionic equation and the net ionic equation for the following: A) Li2SO4 + Sr(NO3)3 ---> B) H2SO4 + Na2CO3 --->

2. ## MATH

1. The population of a city increases by 4000 people each year. In 2025, the population is projected to be 450,000 people. What is an equation that gives the city's population p (in thousands of people) x years after 2010? A) p=4x+450 B)p-450=4(x-5)

3. ## english

MUSICIANS wrestle everywhere: All day, among the crowded air, I hear the silver strife; And—waking long before the dawn— Such transport breaks upon the town5 I think it that “new life!" It is not bird, it has no nest; Nor band, in brass and scarlet

4. ## physics

Train cars are coupled together by being bumped into one another. Suppose two loaded train cars are moving toward one another, the first having a mass of 160,000 kg and a velocity of 0.300 m/s, and the second having a mass of 115,000 kg and a velocity of

5. ## Physics

A particle with a mass of 1.55 kg is acted on by a force Fx acting in the x-direction. If the magnitude of the force varies in time as shown in the figure below, determine the following.

6. ## Health

the muscular system is essential because it allows our bones to

7. ## Math

[Key: /= a fraction bar] Olga ran 5 kilometers in 37 minutes. Which could Olga use to determine m, the number of minutes she would take to run 25 kilometers at this rate? A. 37/5 = 25/m B. 5/m = 25/37 C. 37/5 = m/25 D. 5/m = 37/25

8. ## Science

True or False: Tides are caused by the force of inertia from the sun and moon acting on earth.

9. ## Physics

A mass of 0.55 kg attached to a vertical spring stretches the spring 36 cm from its original equilibrium position. The acceleration of gravity is 9.81 m/s2 . What is the spring constant? Answer in units of N/m.

10. ## algebra

determine whether 447 is a term of each sequence(s) If so, whitch term is it ? A.t(n)=5n-3 B.t(n)=24-5 C.t(n)=-6+3(n-1) D.t(n)=14-3n E.t(n)= -8-7(n-1)

11. ## AP Physics

A dart gun vertically launches a 25g dart 50 cm high. Determine the minimum energy stored in the spring when the dart gun was loaded. What would the qualitative bar graph and energy flow diagrams look like?

12. ## Physics

Determine the magnitude of the gravitational force Mars would exert on man if he was on the surface of Mars. The mass of the man is 69.0kg . The mass of the Mars is 6.42×1023kg and its radius is 3396 km.

13. ## solid mensuration

in the pyramid shown in the figure , AB=9 in ., BC= 12in ,and BD= 5 in . the three face angle at B are each 90 degree . calculate the three face angles at A and the total surface of the solid.

14. ## Please check my Calculus

1. Given f(x)=-6/x, choose the correct statement A. The graph of f is concave upward on the interval (negative infinity, 0) B. The graph of f is concave downward on the interval (negative infinity, 0) C. The graph of f is concave upward on the interval

15. ## Math

Q. Sidney flew in an airplane five times during her vacation. The flights overaged 2 hours 28 minutes long. The lengths of her first four flights were 2 hours 10 minutes,3 hours 20 minutes,1 hour 15 minutes,and 2 hours 40 minutes. What was the length of

16. ## math

The ratio of rock music to total discs that Ellen owns is 25/40. Paul has 50 rock music discs. The ratio of rock music to total discs in his collection is equivalent to the ratio of rock music to total discs in Ellen's collection. how many discs do they

17. ## Math

The marsh family took a vacation that covered a total distance of 1356 miles. The return trip was 284 miles shorter than the first part of the trip. How long was the return trip? My answer is 1356-284= 1072

18. ## math

Karen collects local and foreign coins. of the coins in her collection, 1/4 are foreign coins. Of the foreign coins,2/5 are from mexico What fraction of the collections are foreign coins that are not from mexico?

The two-way table shows the number of people whose hobbies are reading or solving puzzles and who either ride a motorcycle or don’t ride a motorcycle. Among people whose hobby is reading, what is the relative frequency of not riding a motorcycle? Express

20. ## english

It had been there when the midwife had announced, ‘You’ve a boy.’ The hat was there when his wife had their second little joy. Why does the author MOST likely choose the words, ‘their second little joy’? A)They had twin boys. B)It expresses that

21. ## Physics

As shown in the figure below, cars #1 and #2 are sliding across a horizontal frictionless surface. The cars are equipped with a coupling arrangement similar to the one on railroad cars. Car #1 overtakes car #2 and they have a totally inelastic collision

22. ## Math

Brenda's School is selling tickets to a spring musical. On the first day of ticket sales the school sold 3 senior citizen tickets and 9 child tickets for a total of \$75. The school took in \$67 on the second day by selling 8 senior citizen tickets and 5

23. ## English

Which adjective best describes the community's attitude toward Mari Djata's inability to walk in Sundiata? A. fearful B. indifferent C. sympathetic D. mocking B?

24. ## physics

A woman measures the angle of elevation from her current location to a mountaintop to be 12.0°. After walking 1.10 km closer to the mountain on level ground, she measures the angle again and finds it to be 14.0°. What is the height of the mountain?

25. ## physics

1. While strolling along on unknown planet, an astronaut decides to throw a hammer and a feather upwards at 5.0 m/s. They both return to the point of release in 3.0 s. What is the acceleration due to gravity on Planet X. 2. Marii jumps straight upward at

26. ## Math

Michelle has a starting balance on a gift card for \$300. She buys several dresses at \$40 a piece. After her purchases she has \$140 left on the gift card. How many dresses did she buy?

27. ## Statistics

The image of the public library is constantly changing, and their online services continue to grow. Usage of the library's home page grew by 17% during the past 12 months. It has been estimated that the current average length of a visit to the library's

28. ## english

Burned down to the ground, nothing left but the floor Which stylistic device does the author use in line 10 ? A)alliteration B)assonance C)personification D)repetition D? It’d seen a child die—Depression--a war, Which stylistic or literary device is

29. ## clothing an textiles

six ways in which control fullness in a garment explain any two methods

30. ## Physics-Check

In a marathon race, one runner is moving at 5.0 m/s passes a second runner moving at 4.5. What is the distance between the runners 10 minutes after the one runner has passed the other? 5m?

31. ## samoana high school

phoebe physics pulls a wagon with a force of 80 N. a) what is the net force of friction between the wagon and the ground is 12 N. b) if she uses 80 N to pull the wagon through a med puddle, and the net force on the wagon is 38 N, what friction force asts

32. ## Maths

a missile guidance system has five fail-safe components. the probability of each failing is 0.05. find these probabilities. a) Exactly 2 will fail b) More than 2 will fail c) All will fail. d) Compare the answer for parts a, b, c, and explain why these

33. ## Math

The formula W = 35.74 + 0.6215T - 35.75V^4/25 + 0.4275TV^4/25 relates the wind chill temperature W to the air temperature T in degrees Fahrenheit and the wind speed V in miles per hour. Use a calculator to find the wind chill to the nearest degree when the

34. ## history

Question 2 (04.05 MC) Using the map and your knowledge of U.S. history, what do the details of the Rocky Mountains suggest about the Lewis and Clark expedition? The group made a grave mistake in not turning back in Missouri. The group really could have

35. ## Currently doing Math,life science,geography and ph

I am thinking of changing physical science and do business with math,life science,business and geography what career can i pursue?

36. ## ENGLISH - GRAMMAR ????

Are these correct? Brow - countable noun Zoo - countable Poverty - uncountable Doctor - countable cook - countable Prize - uncountable Fair - countable Town - countable Toast - uncountable Beach - uncountable Room - countable

37. ## Math

artaud noticed that if he takes the opposite of his age and adds 40 he gets the number 28. how old is artaud?

38. ## us history

which of the following describes the main reason the Spanish conquistadors needed native american slaves? A: they needed help to find gold and send it back to Spain B: the native american slaves aided them with their tobacco crops C: the Spanish wanted to

39. ## chemistry

The molarity of a kool-aid packet is 0.365M. How many grams of sucrose (C12H22O11) are in 200mL of the kool-aid drink? --- I know that the molar mass is 342.29648 g/mol kool-aid. I'm not sure on how to find the grams of the solute.

40. ## Maths Mechanics

A plane flies due north at 300km/h but a crosswind blows north-west at 40km/h. Find the resultant velocity of the plane. Once I have drawn I diagram it is often okay, but it is the initial steps that I struggle with.

41. ## physics

An 85-kg jogger is heading due east at a speed of 2.0 m/s. A 55-kg jogger is heading 22° north of east at a speed of 2.7 m/s. Find the magnitude and direction of the sum of momenta of the two joggers.

42. ## Chemistry

2C2H2(g) + 3O2(g) 4CO(g) + 2H2O(g) What is delta G° for this reaction in J/mol? (T = 298.17 K)

43. ## math

The main span of a suspension bridge is the roadway between the bridge's towers. The main span of the Walt Whitman Bridge in Philadelphia is 2000 feet long. This is 600 feet longer than two-fifths of the length of the main span of the George Washington

44. ## AP Physics

A ball has an initial velocity of 3 m/s. If there is no friction, what is the highest it could roll? What would the qualitative bar graphs and energy flow diagram look like?

45. ## Math

if x erasers have a weight of 80 grams, what is the total weight of 50 erasers?

46. ## Chemistry

As a purity check for industrial diamonds, a 22 - carat diamond (1 carat = 0.2g) is heated to 63 degrees C and immersed in 26g of water in a constant pressure calorimeter. The initial temperature of the water is 23 degrees C. Calculate the ΔT of the water

47. ## Please check my Calculus

1. Find all points of inflection: f(x)=1/12x^4-2x^2+15 A. (2, 0) B. (2, 0), (-2, 0) C. (0, 15) D. (2, 25/3), (-2, 25/3) E. none of these I got D. I found the second derivative and equaled it to 0 and solved for x. I plugged the x values in to get my

48. ## chem/math

A car traveling with a constant speed travels 150km in 7200s. What is the speed of the car?

49. ## Math

A total of 10,000 is invested into two funds paying 7.5% and 9% simple interest. The combined annual income for the two funds is \$849. Determine how much is invested at each rate

50. ## Math

if x erasers have a weight of 80 grams, what is the total weight of 50 erasers?

51. ## statistics

The lifetimes of light bulbs of a particular type are normally distributed with a mean of 370 hours and a standard deviation of 5 hours. What percentage of bulbs has lifetimes that lie within 1 standard deviation of the mean on either side?

52. ## Please check my Caclulus

1. Find all intervals on which the graph of y=(x^2+1)/x^2 is concave upward. A. (negative infinity, infinity) B. (negative infinity, -1) U (1, infinity) C. (negative infinity, 0) U (0, infinity) D. (1, infinity) E. none of these I got C. I found the second

53. ## Maths

College Education and Business world success R. H. Bruskin Associates Market Research found that 40% of American do not think that having a college education is important to succeed in the business world. if a random sample of five Americans is selected,

54. ## math

what is 8/100, 3/5, 7/10 least to greatest

55. ## Chemistry

When a chemist burns ammonia according to the reaction below she finds that the reaction releases heat. (It is exothermic.) 4NH3(g) + 3O2(g) 2N2(g) + 6H2O(g) The enthalpy of the reaction DH = -1267 kJ. What is the enthalpy change (in kJ) when 7 grams of

56. ## physics

an airplane is flying at 300 m/s(672 mi/h).How much time must elapse before a clock in the airplane and one on the ground differ by 1.00 s?

Some of the water flows over the dam and is converted to energy, some water evaporates into the air. What spheres does the water, or hydrosphere interact with this example? a. Geosphere and atmosphere B. Atmosphere and biosphere C. Crysophere and

58. ## math

The temperature drops 5F each hour for 4 hours. Use en integer to express the total drop in temperature.

59. ## Chemistry

In an acid base titration 32.5 mL of sodium hydroxide, NaOH, were neutralized by 17.6 mL of 0.180 mol/L sulfuric acid, H2SO4. Calculate the concentration of the sodium hydroxide.

60. ## Science

What is the main method of heat transfer from the core to the crust of earth? A. Conduction B. Convection C. Radiation

61. ## physics

hummingbirds beat their wings 1500 times in 30seconds calculate frequency and the period

62. ## Algebra

The Badys and their maid, Alice, took a trip to Hawaii for their summer vacation. The travel agent told Ike that the trip would cost \$210 for each child plus another \$315 per adult. According to Ike Bady’s credit card receipt, the trip cost a total of

63. ## maths

Driving to work alone. It is reported that 77% of workers aged 16 and over drive to work alone. Choose 8 workers at random. Find the probability that a) All drive to work alone b) More than one-half drive to work alone c) Exactly 3 drive to work alon

64. ## Engkish

Brow - countable noun Zoo - countable Poverty - uncountable Doctor - countable cook - countable rize - uncountable Fair - countable town - countable toast - uncountable Beach - uncountable Room - countable

65. ## Physics

A block initially at rest, slides down from the top of an inclined plane 30degrees above the horizontal. The plane is 100feet long and frictionless. what distance will it travel on a frictionless horizontal surface at the foot of the plane 6seconds after

66. ## physics

A 2.50 g bullet, traveling at a speed of 485 m/s, strikes the wooden block of a ballistic pendulum, such as that in the figure below. The block has a mass of 275 g.

67. ## To: Linda mogale

I deleted your post because you included a phone number. Please do not post personally identifiable information on Jiskha, You should do what YOU want to do for a career.

68. ## Math

A rectangle is 26 meters long and 18 meters wide.What is the length of the diagonal of the rectangle to the nearest meter? equation: A2 + B2= C2 I don't know where to put the numbers, but I think the answer may be 32. Thank you for any help!

69. ## Science

If a certain spring stretches 9.76811 cm when a load of 17.9936 N is suspended from it, how much will the spring stretch if it is cut in half and 65.8458 N is suspended from it? Answer in units of cm.

70. ## Statistics

If light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours, what percentage of light bulbs have a life less than 2500 hours

71. ## physics

A 51.5-kg skater is traveling due east at a speed of 2.70 m/s. A 69.5-kg skater is moving due south at a speed of 7.50 m/s. They collide and hold on to each other after the collision, managing to move off at an angle θ south of east, with a speed of vf.

72. ## Calculus

suppose a car is decelerating at a constant rate of 5 m/s^2 (i.e. its acceleration is -5m/s^2) . If the car has an initial velocity of 25m/s, how far does the car travel before coming to a full stop?

73. ## statistics

Can you explain how to do this problem The following is a list of 11 measurements: 72, 28, 56, -47, -36, -41, 21, -31, -56, 41, -54 . Suppose that these 11 measurements are respectively labeled x1, x2,...x11 . (Thus,72 is labeled x1 ,28 is labeled x2 and

74. ## Math

Equation: t=5(logP/log0.5) P is the percentage of caffiene in the bloodstream related to t, time elapsed in hours Suppose you drink a cup of coffee at 9:00 a.m. What percentage of the caffiene will remain in your body at noon?

75. ## science

A 5-kg cat accelerates at a rate of 2 m/s. What is the net force acting on the cat? a. 10 N b. 7 N c. 3 N d. 2.5 N

76. ## Chemistry

2Mg(s) + O2(g) 2MgO(s) If 9.92 g of Mg reacts with 8.52 g of O2. How many grams of MgO could be produced? I am just very confused and need an answer so that I can look back on how you got there . . .

77. ## Geometry

If a central angle of 90 degrees defines an arc on circle R that has the same length as the arc on circle W defined by a 60-degree central angle, what is the ratio of the area of circle R to the area of circle W? Express your answer as a common fraction.

78. ## physics

how much heat is needed to raise the temperature of 5kg of silver from 20 degrees C to 96 decgrees C?

79. ## chemistry am i right

Balance and complete equation H2SO4 + Na2CO3 ---> Na2SO4 + H2O + CO2

80. ## Please check my Calculus

1. Find all points of inflection of the function f(x)=x^4-6x^3 A. (0, 0) B. (0, 0), (9/2, -2187/16) C. (3, -81) D. (0, 0), 3, -81) E. none of these I got D. I found the second derivative and solved for x and plugged values into original function to get

81. ## science

the area drained by a river and its tributaries is called its

82. ## english

In the following sentence identify the appositive or appositive phrase and the noun or pronoun renamed by the appositive. Mr. Murray, the Scoutmaster, likes to hike. Appositive: Noun or pronoun renamed:

83. ## Math

Out of 18 students at dance camp, 6 are boys. What is the ratio of girls to students at the dance camp, in simplest form.

84. ## chemistry

A 0.248 M ZnCO3 solution is made from 21.4 g of solute? What is the volume of the solution?

85. ## Math

A scientist is monitoring the temperature of a holding tank containing fish to be released into a river. In one 12-h period, the highest temperature was 10.4°C and the lowest temperature was 7.6°C. Write an absolute value equation that can be used to

86. ## Chemistry

if 50 grams of sodium hydroxide mixed with 25 grams of hydrochloric acid how many grams of salt can be formed?

87. ## English

Which poetic line contains both paradox and consonance? One summer day, all day I drove it hard How long it might last, how young it might be Ay, look, and he'll smile thy gloom away At least to know the worst is sweet

88. ## math

The temperature outside was 3 degrees Fahrenheit at midnight. During the next hour the temperature fell 7 degrees. What was the temperature at 1 A.M. Can u explain to me how to do it please

89. ## maths

A solid cube with an edge 10 cm is melted to from two equal cubes. Find the ratio of the edge of the smaller cube to the edge of the bigger cube ?

90. ## chemistry

The ionic equation and net ionic equation and balance equation: A) Ca(OH)2 + HNO3 --> B) H2SO4 + Na2CO3 --->

91. ## Math

Suppose you purchase 3 identical T-shirts and a hat. The hat costs \$19.75 and you spend \$56.50 in all. How much does each T-shirt cost? My answer 56.50- 19.75= 36.75 36.75/3=12.25 each

92. ## physics

A golf ball strikes a hard, smooth floor at an angle of θ = 26.4° and, as the drawing shows, rebounds at the same angle. The mass of the ball is 0.047 kg, and its speed is 45 m/s just before and after striking the floor. What is the magnitude of the

93. ## Math stem question

The main span of a suspension bridge is the roadway between the bridge's towers. The main span of the Walt Whitman Bridge in Philadelphia is 2000 feet long. This is 600 feet longer than two-fifths of the length of the main span of the George Washington

94. ## math

A checkerboard is 10 inches long on each side.What is the length of the diagonal from one corner to another? I know, I will need to use the equation... A2+B2=C2....but I don't know where to put the numbers. Thank you for the help!

95. ## Civics

In the United States, which level of government has the highest authority? State *** County City National

96. ## Chemistry

A skillet made of Iron (Fe) weighing 1.8 kg is heated on a stove to a temperature of 202 degrees C. If the skillet is removed from the stove and allowed to cool to room temperature (21 degrees C), how much heat must be removed from the skillet. The

97. ## Please check my Calculus

1. Find the value(s) of c guaranteed by Rolle’s Theorem for f(x)=x^2+3x on [0, 2] A. c=-3/2 B. c=0, 3 C. Rolle’s Theorem doesn’t apply as f is not continuous on [0, 2] D. Rolle’s Theorem doesn’t apply as f(0) does not equal f(2) E. None of these

98. ## History

I'm doing the 5 W's (Who, What, When, Why, Where) and How for the Embargo Act but I'm having trouble finds the How part.

99. ## math

The scale balanced when n+20=80 Suppose the left side becomes n+3 How can I change the right side so that n+3=____ is equivalent to n+20=80 How can I change the right side to get an equivalent equation my choices are A. Add blank to the right side B.

100. ## science

i need help with more questions in the packet heres my question the poisonous gas hydrogen sulfide, H2S, can be neutralized with a base such as sodium hydroxide, NaOH. THE unbalanced equation for this reaction follows: NaOH(aq)+H2S(g)→Na2S(aq)+H2O(l) a

101. ## math/algebra

Mr. Jenkins is going to buy museum tickets for a class trip. The museum director quotes him the following prices: • 20 tickets cost a total of \$250. • 30 tickets cost a total of \$375. • 50 tickets cost a total of \$625. a. Based on these prices, is

102. ## trigo

two points A and B are 562 meter apart on a level stretch of road leading to a hill . the angle of elevation from A is 26degree 30minutes, and angle of elevation from B is 36degee 40minutes. how high is the hill ?

103. ## math

A cuboid measures 6cm long, 5cm wide and 4cm high. What is the total length of the edges in centimeters?

104. ## ap chemistry

how do you find the mass of dehydrated sample? mass of crucible and cover- 30.95 g mass of hydrated sample, crucible, and cover- 32.75 g mass of hydrated sample-? mass of dehydrated sample, crucible and cover- 1st weighing-32.47 g mass of dehydrated

105. ## chemistry

What mass of precipitate is formed when 0.750 L of 2.50 mol/L CaCl2 reacts with 650 mL of 1.75 mol/L AgNO3

106. ## Science

Explain the motion of a baseball and the forces acting upon it as it leaves the pitcher’s hand and travels toward the batter at home plate. Identify the term applied to this type of motion.

107. ## Civics

The U.S. federal and state governments are similar because both levels of government have the power to declare war on a nation collect taxes from citizens trade with foreign countries *** print currency and control banks

108. ## Please check my Calculus

1. Find all critical values for f(x)=(9-x^2)^⅗ A. 0 B. 3 C. -3,3 D. -3, 0, 3 E. none of these I got D. I found the derivative and solved for critical numbers. 2. Find all intervals on which the graph of f(x)=(x-1)/(x+3) is concave upward A. (negative

109. ## Physics

A 4.00-g bullet is moving horizontally with a velocity vector v = 348 m/s, where the sign + indicates that it is moving to the right (see part a of the drawing). The bullet is approaching two blocks resting on a horizontal frictionless surface. Air

110. ## Chemistry

Calculate the total heat (in Joules) needed to convert 1.602 x 101 grams of ice at -1.383oC to liquid water at 8.554 x 101oC. Melting point at 1 atm 0.0oC Cwater(s) = 2.09 J/goC Cwater(l) = 4.18 J/goC delta Hofus = 6.02 kJ/mol

111. ## physics

A student in the laboratory connects a 13 Ω resistor, a 24 Ω resistor, and a 41 Ω resistor in parallel and then connects the arrangement to a 43 V dc source. What is the current? What is the power? (in watts)

112. ## Chemistry

HAve to find a formula to work out the energy required to thermally decompose water into hydrogen and oxygen.

113. ## Pre-Cal

A wire 360 inches long is cut into two pieces. One piece is formed into a square and the other into a circle. If the two figures have the same area, what are the lengths of the two pieces of wire (to the nearest tenth of an inch)?

114. ## Chemistry

Calculate the heat transferred when a 23 g of iron nail is cooled from 67oC to 20oC. The specific heat of iron is 0.45 J/goC.

115. ## Physic- help on direction (Not that good at Englis

Galileo figured out the equation that describes the behavior of a pendulum. If you square both sides of the equation, you will find that the slope of the line is related to the acceleration due to gravity (g). Specifically, slope = 4PI^2/g. Use your data

116. ## chemistry

i have a homework packet that i am struggling with can you please help me my first question is i have to finish the following equation to balance it out my question is 3Fe3O4+blankAl→blankAl2O3+blankFe now i tried and i got 3Fe3O4+2A=2Al2O3+2Fe i don't

117. ## physics

A 0.580-kg ball is dropped from rest at a point 1.60 m above the floor. The ball rebounds straight upward to a height of 0.650 m. What are the magnitude and direction of the impulse of the net force applied to the ball during the collision with the floor?

118. ## Statistics

Did you ever buy an incandescent light bulb that failed (either burned out or did not work) the first time you turned the switch on? When you put a new light bulb into a light fixture, you expect it to light and most of the time it does. Consider 8-packs

119. ## science

i need help with a packet that im struggling with my questions are write the total number of atoms present for the following questions: a. 4SO2 now i tried and got 8O'S and 1S b. 8O2 i tried and got 16 all together c. 3Al2(SO4)3 i tried and got 6Al, 3S,

120. ## Math

Trail Max is sold and 1 pound bags Mary will buy some trail mix and repackage it so that each of the 15 members of the biking club gets one 2/5 pound bag how many 1 pound bags of Trail mix should mary buy to have enough without leftovers

121. ## Socials Studies

Toussaint Louverture was immortalized in sonnet by the British poet Wordsworth

122. ## physics

The student’s body is 22% percent eﬃcient; that is, for every 22 J that are converted to mechanical energy, 100 J of chemical energy are expended, with 78 J going into thermal energy. How much chemical energy is expended by the student during the

123. ## DrBob222 my previous question

You asked me to show my work for one of my questions a few minutes ago and i need you to verify my work because you said my answer was wrong

124. ## Physics

An automobile has a mass of 2000 kg and a velocity of +12 m/s. It makes a rear-end collision with a stationary car whose mass is 1850 kg. The cars lock bumpers and skid off together with the wheels locked.

125. ## history

uncramble dropifthegoits

126. ## chemistry

The concentrated H2SO4 of 155g dissolved in enough amount of water if acidic solution is 2.3L a) what is the mole of H2SO4 b) what is the concentration H2SO4 c) what is the concentration of H+(H3O+) created in the solution d) what is the PH value of

127. ## chemistry

In an acid base titration,25.0 ml of nitric acid, HNO3, were neautralized by 28.0 mL of 0.209 mol/L calcium hydroxide, Ca(OH)2. What is the concentration of the nitric acid?

128. ## Calculus

suppose a car is decelerating at a constant rate of 5 m/s^2 (i.e. its acceleration is -5m/s^2) . If the car has an initial velocity of 25m/s, how far does the car travel before coming to a full stop? So do I try to integrate the acceleration to find the

129. ## physics

The acceleration of a particle which moves along the x axis is given by a=4x+5x^(3/2) The particle has speed of 2m/s when x=1m x is in meters a is in m/s^2 evaluate the velocity when x = 8m I know that I need to use kinematic eqn 3 adr = vdv then take the

130. ## Science

Describe genetic engineering on a cellular level. In other words, what exactly takes place during genetic engineering that inserts a trait into an organism that did not have that trait before? Give an example.

131. ## physics

A cargo plane is moving with a horizontal velocity of vx = +230 m/s at a height of y = 840 m above level ground as shown in the figure below when it releases a package. Ignoring air resistance, how much time will it take the package to reach the ground?

132. ## math

You plan to visit two different zoos but cannot decide which two to visit. On a piece of paper,you write the name of each zoo in the table. Then you select the names of two zoos at random. Are your selections independent or dependent events. Explain. B.

Factor 48x+8

134. ## math

May takes 12 hours to type a report. Her friend helps her and together they finish the job in 4 hours. How long would it take her friend had she worked alone? Representation: Equation: Solution: Conclusion:

135. ## Please check my Calculus

1. Which of the following describes the behavior of f(x)=x^3-x A. Relative maximum: x=0 B. Relative maximum: x=(1/sqrt(3)); Relative minimum: x=(-1/sqrt(3)) C. Relative maximum: x=(-1/sqrt(3)); Relative minimum: x=(1/sqrt(3)) D. Relative minimum: x=0 E.

136. ## soc102

the relatvivist would agree with which statement about stem cell

Given that k,3k and k+1 are three consecutive terms of an A.P,find the numerical value of k.Then find the first term if 3k is the sixth term of the progression. Answer:k=1over4 a=-7over4 I got the k but the a i can't get

138. ## Physics

Driving along a crowded freeway, you notice that it takes a time t to go from one mile marker to the next. When you increase your speed by 7.0 mi/h, the time to go one mile decreases by 14 s. What was your original speed? Please explain me step by step

The first three terms of an arithematic profgression are x,2x+y and 9x-y.The sum of these three terms is 60.Find the numerical values of x and y.Then,calculate the eleventh term of the progression

140. ## Calculus

F(x) = 3/4x^4 –x^3 -3x^2 + 6x Determine the interval(s) where f(x) is increasing (if any) and the interval(s) where f(x) is decreasing (if any). How do I know where f(x) is increasing or decreasing?

141. ## chemistry check my answer

In an acid base titration 32.5 ml of sodium hydroxide were neautralized by 17.6 ml of 0.180 mol/l sulfuric acid. Calculate the concentration of the sodium hydroxide. I asked this question earlier but i wanted to make sure i got the right answer My answer:

142. ## legal research writings

Which of the following legal publications is NOT typically updated with pocket parts? A.Legal encyclopedias B.Legal dictionaries C.Digests D.Treatises I thought it was B The LexisNexis case abbreviation is: LX LN LE LEX I think it's LN

143. ## chemistry Drbobz222

How do i convert mols CaCl2 to AgCl

144. ## math

earned \$296.00 and worked for \$8.00 per hour. how many hours did she work?

145. ## Math

Kayla went to a football game. Her team scored 6 times, and got the extra point each time. A touchdown with an extra point is worth 7 points. How many points did her team score? If the other team scored 2 more times than her team and got 7 each time, how

146. ## Civics

Which of the following is an example of a power the U.S. Constitution delegates to the national government? Print and coin money Charter new banks *** Make laws about marriage Determine voter qualifications

147. ## Chemistry

1.984 g of a hydrate of K2CO3 is dissolved in 250. mLs of H2O. 10.0 mLs of this solution is tirade against 0.100 M HCl, producing the following results. Flask 1 - Initial 0, final 9.2 Flask 2 - Initial 9.2, final 18.3 Flask 3 - initial 18.3, final 27.8

148. ## physics

Kevin has a mass of 77.5 kg and is skating with in-line skates. He sees his 21.00 kg younger brother up ahead standing on the sidewalk, with his back turned. Coming up from behind, he grabs his brother and rolls off at a speed of 2.18 m/s. Ignoring

149. ## mathematical literacy

Are there available degrees relating to comerce, that can be done with Maths Lit, and not Maths. Preferably at a good institute like uct, uj, ukzn, etc.

150. ## Geogeaphy

The higher the latitude the ( cooler, warmer) the temperature will be? Answer: cooler

151. ## chemistry exercises

The concentrated H2SO4 of 155g dissolved in enough amount of water if acidic solution is 2.3L a) what is the mole of H2SO4 b) what is the concentration H2SO4 c) what is the concentration of H+(H3O+) created in the solution d) what is the PH value of

152. ## science

Which cells do the authors identify as the ones most likely to hold the key to increased human longevity and vitality and how might this work? Describe one alternative to cloning that the authors mention.

153. ## chem

When solid calcium is placed in water, it undergoes a vigorous reaction that produces solid calcium oxide, CaO(s) and hydrogen gas. determine the volume of dry hydrogen gas that is produced when 5.00 g of calcium reacts and the gas is collected at 42

154. ## math

John is now two years older than Martha. If Martha's age is represented by x, what will be their total ages after 10 years?

155. ## Please check my Calculus

1. Find all points of inflection of the function f(x)=x^4+x^3 A. (0, 0) and (-½, -1/16) B. (-½, -1/16) C. (0, 0) D. (0, 0) and (-¾, -27/256) E. none of these I got A. I found the second derivative and solved for x and plugged in the values to find the

156. ## trigonometry

a surveyor 1standing on a highway observed the angle of elevation of the airplain as 22.5°. at the same time, a surveyor 2 observed the angle of elevation of the same airplane to be 30°. if the airplane was 850m directly above a point on the highway,

157. ## math

The value of a telephone calling card decreases 20cents for each minute used. Write an integer to express the change in the cards value for a 4 minute call. Use a negative number to represent the card losing value.

158. ## english

I am confused on the use of good, well; real, really; bad, badly. Cats can see good/well in the dark. I think well because it describes how they see(an adverb) After the storm the pier was damaged bad/badly. I think badly because I tells how it was damaged

159. ## Calculus

I get mixed up when graphing derivatives. If I'm given the graph of f how do I get f' and f"?

160. ## Math

Which expression represents the difference of (3y+2)-(y-1)? I put 2y+ 3 for my answer.

161. ## mats

A soft drink can has a circular base with diameter 7 cm and height 12 cm. What is the different in their capacities?

162. ## ENGLISH - GRAMMAR ????

There was no space in the drawing room. - Drawing room - uncountable The sand on the beach was clean. beach - uncountable Ruman met with an accident. Accident - uncountable Are the above are correct?

163. ## chemistry

What volume of 1.34 mol/L hydrochloric acid, HCI is expected to react completely with 6.89 g of calcium

Convection cells are created by very hot material deep in the mantle rising, then cooling, sinking again and repeating the cycle. This process occurs because of the uneven distribution of ? Within the earth? Please fill in the question mark with a answer.

165. ## Social Studdies

Why were the colonists angry about British taxes after the war between Britain and France ?

166. ## Chemistry

Calculate the pH and pOH of a hydrochloric acid solution prepared by dissolving 30.50-kg of hydrogen chloride gas in 806-L of water at SATP.

167. ## Math

The solution set to the inequality:-2x^2+8x-6>0 is ?

168. ## Statistics

A company that produces rivets used by commercial aircraft manufactures knows that the shearing strength (force required to breaking) of its rivets is a major concern. The company believes the shearing strength of its rivets is normally distributed with a

169. ## Math

A school band is having a fundraiser. Band members will sell coupon books for \$10 each. The band earns \$12.50 for every 5 coupon books that are sold. a. After the first week, the band members had sold 105 coupon books. How much money did the band members

170. ## Dynamics

The acceleration of a particle which moves along the x axis is given by a=4x+5x^(3/2) The particle has speed of 2m/s when x=1m x is in meters a is in m/s^2 evaluate the velocity when x = 8m I know that I need to use kinematic eqn 3 adr = vdv then take the

171. ## Algebra

"Using distributive, associative, or commutative property, prove that x^2 - 4 is equivalent to (x - 2)(x + 2)." Firstly, which property would I use to solve this and show equivalence? Secondly, which steps would I need to take in order to show this/obtain

172. ## Do newspapers, magazines, television, radio, movie

Im not sure what directing to go for this essay, i have changed it 3 times. can someone tell me if this would be correct? The answer is media doesn't decide what is important, The creators put out there what they think will catch peoples eyes, boring

173. ## Geography

_________ is the dry side of the mountain because the mountain blocks winds carrying moisture. Answer: east side

174. ## science

name four phylum under the five kingdoms

175. ## math

The value of.a telephone calling card decreases 20cents forma each minute used. Write en integer to express the change un the cards value for a 4 minute call.

176. ## alegebra 2 Help

simplify the compound fraction: ((x+h)^(-3)-x^(-3))/(h) where do i start?

177. ## Algebra

Solve the inequality. Graph the solution on a number line. -2 ≤ d + 0.5 ≤ 4.5

178. ## propability

Lorenzo has a jar with 21 green olives and 15 black olives in it. If he takes two olives out of the jae with replacement,what is the probability that the first olive will be black and the second olive will be green?

179. ## chemistry

What volume of 1.34 mol/L hydrochloric acid, HCI, is expected to react completely with 6.89 g of calcium?

180. ## math

San Diego left San Francisco on Tuesday at 6.30 p.m. and took 8 hours 45 minutes to reach his home. On what day and at what time in a 24 hour system did he reach home?

181. ## math

The value of a telephone calling card decreases 20cents for each minute used.write an integer to express the change in the cards value for a 4 minute call.

182. ## 7th grade math honors

The total cost for renting a kayak is represented as 25+5.50m. What is the constant in the expression 25+5.50m? Show work.

183. ## math

If two number cubes are rolled what is the probability of getting a 1 on both cubes?

184. ## help me please maths

Find the value of 3a + 2b when a = 6 and b = 5. answered????????!!!1111

185. ## Math

(-y^2)^2= ?? Is it -y^4? A negative answer??

186. ## Calculus

Find the point on the parabola x+y^2=0 that is closest to the point (0,-3).

187. ## Calculus

Find the height of street light that is 12 feet tall. How tall is the light. Write in sentence form, do not forget units of measure.

188. ## Math

At a tournament, 2 different games went on for a total of 93 mins. If 1 game took 13 mins longer than the other, how long did it take to complete each game.

189. ## physics

While you are in detention after school, your teacher tells you to slide a large, 89.7 kilogram box across the floor. The coefficient of static friction (ìstatic) between the box and the floor is 0.50. Compute the force parallel to the ground (F

190. ## Math

What rational number is less than 0 but greater than -1/2? I think its negative 1/4 would I be right? Thank You for your help.

191. ## english

how to teach a fourth grader spellings?

192. ## Math

If I were to compare -(-9)and -[-9] would it be less than, more than or equal to? I say it is equal to. Would I be right? Thank You for your help.

193. ## Math

What transformation happens from In x to 3 In x? Also, I had thought that 3 In x and In x^3 are the same, but the graphics calculator shows otherwise.

194. ## Math

The velocity of an object is given by the formula v=25t-80, where the time is expressed in seconds and the velocity is expressed in feet per second. Find the times when the magnitude of the velocity is equal to 60 ft/s. (3 marks)

195. ## Maths

Tyson talked with 150 customers on his shift yesterday. Of those, 20% resulted in a successful upsell of additional purchases. If Tyson makes a \$6 commission on top of his regular salary for each successful upsell that he makes, how much commission did he

196. ## Math

Is 2square root 6 the same as square root 6?

197. ## Math

How to simplify 5^(4/3)? by writing it in radical form?

198. ## English

Make sentences from avoid, honest, dwell

199. ## Algebra

Write an equation of a line that is parallel to y = 3x – 5 and goes through the point (3, 1).

200. ## Make english sentences

Make sentences from avoid, honest and dwell

201. ## algebra--1 question

Find the slope of a line that passes through (-2, -3) and (1, 1) 1/3 1 2 4/3 How do I do this? pls help asap! thanks.

202. ## Algebra

Tell if the following pair of lines is parallel, perpendicular, or neither. 3x - 2y= 16 y= -2/3x + 4

203. ## 12 U Math

Solve and check for extraneous roots. log_2x+log_2(x+2)=3 * _2 is a subscript and (x+2) isn't a superscript*

204. ## Statistics

Can someone help me with this question. I am so very confused. Find the y-intercept of the line whose equation is y=0.7x +6.2. could the answer be 5

205. ## Algebra

Write an equation in point-slope form of the line that has a slope of 1/2 and passes through the point (5, -2).

206. ## math

A school band is having a fundraiser. Band members will sell coupon books for \$10 each. The band earns \$12.50 for every 5 coupon books that are sold. a. After the first week, the band members had sold 105 coupon books. How much money did the band members

207. ## math

The distance (in) is 3.5 in one second how much would it be in 4 seconds???

208. ## Algebra

Write an equation in slope-intercept form of the line that contains the points in the table. X Y 1 9 4 10 7 11 13 13

209. ## physics

A lumberjack (mass = 98 kg) is standing at rest on one end of a floating log (mass = 270 kg) that is also at rest. The lumberjack runs to the other end of the log, attaining a velocity of +2.6 m/s relative to the shore, and then hops onto an identical

210. ## English 122

How are argument sources most relevant to researcheresearchers

211. ## Science

Star athletes like Peyton Manning can travel to Europe to receive stem cell treatment that is not available in the US. What should be our general guidelines about this and other type’s experimental treatments?

212. ## math

3/7, 5/6, 4/5 least to greatest

213. ## Math

For every 1/2 mile that daylan jogs he walks 3/4 mile. What unit rate gives the number of miles daylan jogs for every mile she walks

214. ## Physics

suppose you have a weight of 60 N. if the earth's mass decreased to one fourth its current mass, with no change in radius, then what would you weigh? Can you please explain how I can solve this problem?

215. ## Chemistry (Acid-Base)

I'm a tad confused by the question, The protonation constant for the acid HA has the value K=2*10^6. (a) what is the principal species at pH 6.00? (b) what is the principal species at pH 9.00? (c) what is the quotient [A-]/[HA] at pH 6.3 and 7.5?

216. ## Math

Write an algebraic expression for the following verbal expression. Let n = the number Six less than the product of 12 and a number

217. ## math

allow 2 summers of working, Samuel has decided to invest his earnings. SAMUELS BANK OFFERS TWO CDS, a preferred CD \$10,000 minimum at 1% interest, or a standard CD with \$7000 minimum at 2%interest earned annually. Samuel has \$8000 to invest. how many years

218. ## geometry

I have the basal and volume as hints to find out about the object's height. Is there a specific formula I can follow?

219. ## math

Two cities on a map are 2 and 1/4 inches apart. The cities are actually 112.5 miles apart. How many miles is represented by one inch? What is the actual distance between two cities that are 4 and 3/4 inches apart? Use proportions

220. ## Geometry

A hand drum has a diameter of 14 7/8 inches and is 3 in deep. What is the amount of hide needed if the hide only covers top and lateral faces? *what are lateral faces? Thanks!

221. ## Geometry

I realize I'll get a reply in the morning so... A squash ball must have a diameter either 0.5 mm either above or below 40 mm. a) What is the minimum and maximum surface area of a squash ball? Express answer to nearest square millimetre. Minimum: 4902

222. ## math

At a school prize giving day the number of men was half of women. The number of children was three times that of women. The number of women who attended was 3x. What was the sum of the men and children?

223. ## math

In the following triangle, AB ⊥ CD and AC ⊥ BC CD is the bisector of triangle ABC If AD = 16m, and CD = 8m, find BD

224. ## chemistry

2) At 298K, what are the molarities of pure water?

225. ## Math

How do I find the area of a wall? 15 feet by 9 feet

226. ## algebra

how do i find the scale factor??

227. ## Maths literacy, accounting, economics and business studies

Are ther any possibilities of studying an Accountant career with this subjects?

228. ## chemistry

how many HCl needed to dissolve 1 grams of Al2O3.

229. ## algebra 2

simplify the compound fraction: ((x+h)^(-3)-x^(-3))/(h)

230. ## algebra 2 help

if 3abs(x+4)=8, then x=? A. {-10,2} B. {-2,2} C. {-19,11} D. {-22,-14} which one? idek I think is B but i am not sure help

231. ## Math

How do you find the area of a city that is 16 miles wide and 15 miles long

232. ## History

Imagine that you are taking a journey around the Roman Empire. Write a letter home discussing your travels and talking about the achievements of Rome.

233. ## Economics

5. (paradox of) VALUE = (blank) + (blank). 16. (Blank) is a situation when production cannot reach its full potential because resources are available, but not being used. These are the only two questions that I can't figure out on my study guide. Help?

234. ## math

find the simple interest on naira 28 for 25 years at 1 percentage per annum.

235. ## Math

x=3-3y in slope intercept form Is it y=-1/3x+1

236. ## Math

x+3y=-6 in slope intercept form Is it y=-1/3x-2