# Questions Asked onOctober 8, 2012

1. If a ping pong ball falls from the top of a building that is 168 feet high, how many seconds will it take the ball to hit the ground? Remember, the formula for distance is d = 16t^2. (1 point) 1 3.2 10.5 16 2. The volume of a box can be found by

2. ## science

A truck whose bed is 2.5m long, 1.5m wide,and 1m high delivering sand fro a sand-sculpture competition. How many trips must the truck make to deliver 7 cubic meters of sand?

3. ## CHM

Calculate the percent ionization of hydrazoic acid (HN3) in solutions of each of the following concentrations A) 0.377 M B) 0.107 M C) 4.16*10^-2 M Ka= 1.9*10^-5

4. ## Chemistry

what is the 1. chemical equation 2. complete ionic equation 3. net ionic equation include phase of HCH3COO+NaHCO3 pls correct my answers 1. CH3COOH(aq)+NaHCO3(aq)+CH3COONa(aq)+H2O(l)+CO2(g) 2. CH3COOH(aq)+OH-(aq)=CH3COO-(aq)+H2O(l) 3. OH(aq)+CO2(g)

Suppose you are studying a population of sunflowers growing in a small field. How would you determine the population density of sunflowers in a square meter of the field and in the entire field? Describe your procedure.

6. ## Math

Explain how modeling partial products can be used to find the products of greater numbers

7. ## Chemistry

Write the balanced chemical equation for the decomposition of sodium azide. If this is a redox reaction, show half reactions and determine if spontaneous. The chemical equation is 2NaN3(s) -> 2Na(s)+3N2(g) right? I am confused on the oxidation states for

8. ## Physics

A ferry is crossing a river. The ferry is headed due north with a speed of 1.7 m/s relative to the water and the river’s velocity is 2.4 m/s to the east. a) What is magnitude of the boat’s velocity relative to Earth? Answer in units of m/s b) Find the

9. ## 7th grade masth asap hurry plz ms.sue somebody plz

The area of a circle is found with the formula A = pi r^2, where pi represents 3.14. If a tile artist is placing tiles in a circular mosaic pattern and the area of the circle is 658 square feet, what is the approximate radius of the circle in feet? Can you

10. ## math

A man 6 feet tall walks at a rate of 5 feet/sec toward a street lamp that is 16 feet above the ground. At what rate is the tip ,of his shadow moving? At what rate is the length of his shadow changing when he is 10 feet from the base of the lamp post?

11. ## Chem

You measure two different pressures of the sealed vial containing air and ethanol at two different temperatures; 89027 mmHg at 27C and 90853 mmHg at 40C . From earlier measurements you found that the pressure of air at 27C is 76005 mmHg . Calculate the

2. Joy knits a square blanket that has an area of 1,500 square inches. What is the approximate length of each side of the blanket? (1 point) 16 inches 27 inches 39 inches 42 inches Isn't the answer 39 inches?

13. ## Chemistry

the half-life of cobalt-60 is 5.20 years.. how many milligrams of a 2.000-mg sample remains after 6.55 years

14. ## college chemistry

Mg and O lab how will the relative number of moles of mg and o be affected if the following procedural errors are made? a)crucible is not brought to constant mass before the Mg is added. b)water is not added after the first heating of Mg, and the entire

15. ## Physics

A blue car with mass mc = 410.0 kg is moving east with a speed of vc = 23.0 m/s and collides with a purple truck with mass mt = 1248.0 kg that is moving south with a speed of vt = 10.0 m/s . The two collide and lock together after the collision. 1)What is

16. ## Chemistry

Write a net ionic equation for the reaction that occurs when aqueous solutions of hydroiodic acid and barium hydroxide are combined.

17. ## english 1

Carefully retype this sentence using correct capitalization. Be sure to press Enter. to help prevent pollution, people could walk, ride bikes, and use public transportation.

18. ## Math

You drop the rubber ball from height h it bounces back to 60% of its original height. Write an equation you can use to find the height h?

19. ## trig

weather balloon is directly west of two observing stations that are 10 mi apart. The angles of elevation of the balloon from the two stations are 17.6 degrees and 78.2 degrees. How high is the balloon?

20. ## Chemistry

What volume of a 0.50 M solution of H2SO4 is required to completely neutralize 3.0 grams of NaOH? Write the equation.

21. ## physics

A satellite circles the earth in an orbit whose radius is 2.01 times the earth's radius. The earth's mass is 5.98 x 1024 kg, and its radius is 6.38 x 106 m. What is the period of the satellite?

22. ## Chemistry

The volume of a sample of ideal gas at 25*C is 372ml. What will be the volume of the gas if it is heated at constant pressure to 50*C? What will be the volume of the gas if it is cooled to -272*C?

23. ## Science

In black and white photography, a photon energy of about 4.00 x 10 to the negative 19th power I is needed to bring about the changes in the silver compounds used in the film. Explain why a red light used in a darkroom does not affect the film during

24. ## 7th grade math ms.sue

4. Which statement is true? (1 point) Every real number is an integer. Every rational number is a real number. Every rational number is a perfect square. Every integer is an irrational number. Is this correct? Thanks. 1. Every real number is an integer.

25. ## math

the integer 49 can be written as the sum of smaller perfect squares in a variety of ways. one such way includes six terms: 25+9+4+1+1. if each term has a value between 0 and 49,what is the fewest number of perfect square terms that can be added together

26. ## two dimensional kinematics

A jetliner with an airspeed of 1000 kmlhr sets out on a 1500 km flight due south. To maintain a southward direction, however, the plane must be pointed fifteen degrees west of south. Ifthe flight takes 1 00 min, what is the wind velocity?

27. ## math

in track practice jesse ran a mile in 7 minutes. his mile time was 2.5 times faster than michaels time. write and solve an equation to calculate michaels mile time.

28. ## Physics

A uniform solid cylinder of mass M and radius R is at rest on a slab of mass m, which in turn rests on a horizontal, frictionless table. If a horizontal force is applied to the slab, it accelerates and the cylinder rolls without slipping. Find the

29. ## college chemistry

a student determined the Ca^2+ ion content of a 100mL sample of calcium-fortified orange juice. After adding 2.0M HCl solution to the sample, the student filtered the juice to remove the pulp and other particulate matter. Then the tudent added Na2CO3

30. ## Physics. Really stuck!

two blocks of masses m1 and m2 (m1>m2) are placed on a frictionless table in contact with each other. A horizontal force of magnitude F is applied to the block of mass m1. if P is the magnitude of the contact force between the blocks, what are the net

31. ## Hudson

In a calorimetric experiment, 6.48 grams of lithium hydroxide was dissolved in water. The temp of the calorimeter rose from 25 celcius to 36.66 celcius. What is the molar change in enthalpy for this procces? LiOH(s) -> Li(aq) + OH (aq) (the heat capacity

32. ## Science

How many minutes are required for a radio signal to travel from Earth to a space station on Mars if Mare is 7.83 x 10 to the 7th power km?

33. ## calculus

Find the derivative of the function 1)f(t)=tan(e^2t)+e^tan2t f'(t)= [im not quite sure with this. im assuming the implicit differentiation] 2) F(t)=e^(8tsin2t) [for this one i got 2e^(8t)(4sin(2t)+cos(2t)) but it is incorrect.

34. ## Precalculus/Trig 5

Find the exact value of thet following trigonometric functions: tan(5pi/6) tan(7pi/6) tan(11pi/6)

35. ## algebra 2

Samantha needs to solve the equation x2 - 12x = 40. What must she do to each side of the equation to complete the square?

36. ## Analyzing Data (HELP!!)

Multiplying Rabbits Suppose that a pair of rabbits produces six offsrping: 3 males and 3 females. Assumes that no offspring die. 1. If each pair of rabbits breeds only once, how many offspring would be produced each year for 5 generations? 2. Construct a

37. ## physics

The two angled ropes used to support the crate in Figure P5.7 can withstand a maximum tension of 1500 N before they break. What is the largest mass the ropes can support?

38. ## Chemistry

Given the balanced equation: a. Fe2O3+3C=2Fe+3CO: b. How many moles of Fe are produced when 1.36 moles of carbon monoxide are produced? c. How many grams of Fe is part b equal to? d. how many molecules of Fe are in part B

39. ## physics

A rifle with a muzzle velocity of Vo shoots a bullet at a target R ft away. How high above the target must the rifle be aimed so that the bullet will hit the target?

40. ## chemistry

how much heat is released when 42.3 grams of ammonia is produced?

41. ## physics

A man with a mass of 58 kg stands up in a 69-kg canoe of length 4.0 m floating on water. He walks from a point 0.75 m from the back of the canoe to a point 0.75 m from the front of the canoe. Assume negligible friction between the canoe and the water. How

42. ## Physics

A block of mass 0.4 kg rests on the inclined surface of a wedge of mass 1.7 kg. The wedge is acted upon by a horizontal force F~ and slides on a frictionless surface. The acceleration of gravity is 9.81 m/s2. If the coeﬃcient of static friction between

43. ## two dimensional kinematics

A freight train is moving at a constant speed of Vt. A man standing on a flatcar throws a ball into the air and catches it as it falls. Relative to the flatcar, the initial vellocity of the ball is Vib straight up. a. What are the magnitude and direction

44. ## Analyzing Data

Multiplying Rabbits Suppose that a pair of rabbits produces six offsrping: 3 males and 3 females. Assumes that no offspring die. 1. If each pair of rabbits breeds only once, how many offspring would be produced each year for 5 generations? 2. Construct a

45. ## Physics..PLZ HELP!!

A rollercoaster reaches the top of the steepest hill with a speed of 6.0 km/h. It then descends the hill, which is at an average angle of ?=45 and is 45.0 m long. Estimate its speed when it reaches the bottom. Assume µk=0.18.

46. ## world history

4. Which pope wanted Christians to unite to redress what he saw as an imbalance of power between Christianity and Islam? A. Pope Urban II B. Pope Clement VI [C. Pope Benedict] D. Pope John Paul

47. ## Trigonomety question

How do you find the exact value of Sin(13pi)?

48. ## Algebra

If 800ml of a juice drink is 15% grape juice, how much should be added to make a drink that is 20% grape juice?

49. ## Finite

Assume that the box contains balls numbered from 1 through 28, and that 3 are selected. A random variable X is defined as 1 times the number of odd balls selected, plus 2 times the number of even. How many different values are possible for the random

50. ## physics

a place kicker must kick a football from a point 32.0 m from the goal. As a resultof the kick, the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 23.0 m/s at an angle of 53 degrees to the

51. ## Precalc/Trig Word Problem

From the top of a 200-ft lighthouse, the angle of depression to a ship in the ocean is 23 degrees. How far is the ship from the base of the lighthouse?

52. ## Chemistry

A 15.0 mL sample of 0.250 M H2SO4 is neutralized by 20.5 mL of KOH solution. What is the molarity of the KOH solution?

53. ## physics

copper has 8.5 x 10^28 electrons per cubic meter. (a) how many electrons are there in 30 cm length a 12 gauge copper wire (diameter 2.05 mm)? (b) if a current of 1.55 A is flowing in the wire, what is the average drift speed of the electrons along the

54. ## Physics 1

Consider a roller coaster that moves along the track shown in the figure below. Assume all friction is negligible and ignore the kinetic energy of the roller coaster's wheels. Assume the roller coaster starts with a speed of 19 m/s at point A. Find the

55. ## us history

What is a feature of the american political system not adopted from practice in england?

56. ## Chem Lab

I did a chem lab and have to figure out some stuff off of some data I found during the lab Weight of empty crucible and cover: 19.74 g Weight of crucible, cover and hydrated salt: 22.74 g Weight of crucible, cover and hydrated salt after 1st heating: 22.13

57. ## Mathematics

The angle of elevation of the top of a flagpole from a point on the level ground is 30degrees. From another point on the ground 20m, nearer the pole the angle of elevation is 60degrees. Calculate the height of the pole?

58. ## Chemistry

Write a net ionic equation for the reaction that occurs when aqueous solutions of potassium hydroxide and nitrous acid are combined.

59. ## Biology

On your travels through eastern Canada and the United States, you notice gray squirrels everywhere. What can you infer about the squirrels' geographic range?

60. ## Physics

A lamp hangs vertically from a cord in a descending elevator that decelerates at 2.9 m/s2. a) If the tension in the cord is 94 N, what is the lamp's mass? b)What is the cord's tension when the elevator ascends with an upward acceleration of 2.9 m/s2?

1.write the first four terms of the sequence that begins with 2000 and has the common ratio 1.05. 2.write the first four terms of the sequence that begins with 5000 and decays 15% with each term.what is the common ratio? 3.write a recursive formula for the

62. ## physics

A skier squats low and races down an 11◦ ski slope. During a 3 s interval, the skier accelerates at 2.7 m/s^2 . What is the horizontal component of the skier’s acceleration (perpendicular to the direction of free fall)? Answer in units of m/s^2.

63. ## two dimensional kinematics

If you can throw a stone straight up to a height of 16m, how far could you throw it horizontally over level ground? Assume the same throwing speed and opitimum launch angle.

64. ## English

Read each sentence then write each transitive verb. if a sentence has no transitive verb(direct object) write none. Example: Jamie watered the plants in the sunroom. Answer: watered transitive 1. Molly hammered the final nail hammered Transitive 2.The snow

65. ## chemistry

A 10.0 ml diluted chloride sample required 44.89 ml of 0.01982 M AgNO3 to reach the Fajans end point. how many moles of Cl- ions were present in the sample? What was the concentration of chloride in the diluted solution?

66. ## physics

A mass m1 = 10 kg on top of a rough horizontal table surface is connected by a massless cable over a frictionless wheel to a hanging mass m2 = 5 kg, as shown in the previous problem. In m2 falls 1 m from rest in 1.2 seconds, find the co-efficient of

67. ## Physics 1

A skier of mass 109 kg travels down a frictionless ski trail. a)If the top of the trail is a height 218 m above the bottom, what is the work done by gravity on the skier? _____J b)Find the velocity of the skier when he reaches the bottom of the ski trail.

68. ## two dimensional kinematics

A hammer slides down a roof of angle theta (with respect to the ground). It slides along the roof distance D. As it leaves the roof, a height H above the ground, it has velocity in both directions. Find how far from the base of the building the hammer

69. ## math

Jan is standing on a roof of a building. She launches a water balloon upward at an initial speed of 44 feet per second at height of 20 feet. How long will it take before the balloon lands on the ground? Round to the nearest tenth of a second.

70. ## Physics

Planet Mars has a mass of 6.4 × 1023 kg, and you have a mass of 5.0 × 101 kg. What force of gravity is exerted between you and Mars, if you are standing on its surface?

71. ## Chemistry

1. How many moles of Al(CN)3 are in 199 g of the compound? 2. 96.0 mol of P4O10 contains how many moles of P? 3. If 4.71 moles of C5H12 reacts with excess O2, how many moles of CO2 will be produced in the following combustion reaction? C5H12+8O2 ->

72. ## Physics 1

A horizontal force of 30 N pulls a block of mass 2.5 kg across a level floor. The coefficient of kinetic friction between the block and the floor is μK = 0.25. If the block begins with a speed of 2.0 m/s and is pulled for a distance of 18 m, what is the

a bond that has \$1,000 par value (face value) and a contract or coupon interest rate of 11.5%. The bonds have a current market value of \$1,126 and will mature in 10 years. the firms marginal tax rate is 34%. what is the cost from this bond debt is __%

74. ## Finite Math

A biology quiz consists of 10 multiple -choice questions. 7 must be answered correctly to receive a passing grade. If each question has 4 possible answers, of which only one is correct, what is the probability that a student who guesses at random on each

75. ## physics

A bus with a vertical windshiled moves along in a rainstorm at speed V relative to the ground. The raindrops fall vertically with a terminal speed of V' relative to the ground. At what angle do the raindrops strike the windshield?

76. ## Managarial Finance

"Stephenson Real Estate Company was founded 25 years ago by the current CEO, Robert Stephenson. The company purchases real estate, including land and buildings, and rents the property to tenants. The company has shown a profit every year for the past 18

77. ## Algebra

A farm stand owner mixes apple juice and cranberry juice. How much should he charge if he mixes 8 L of apple juice selling for .45/L with 10 L of cranberry juice selling for \$1.08/L?

78. ## Chemistry

Transferrin (T) - Molar mass = 81000g/mol - carries 2 Fe3+ ions Deferrioxxamine B (DB) molar mass = 650g/mol - carries 1 Fe3+ at wavelength 428 molar absorptivity T = 3240 molar absorptivity DB = 2630 at wavelength 470 molar absorptivity T = 4370 molar

79. ## math

The volume V of a gas varies inversely as pressure P is exerted. If V = 4 liters when P = 3.5 atmospheres, find V when P = 2.5 atmospheres. Note: Round your answer to the nearest thousandth.

80. ## physics

At an amusement park there is a ride in which cylindrically shaped chambers spin around a central axis. People sit in seats facing the axis, their backs against the outer wall. At one instant the outer wall moves at a speed of 3.04 m/s, and an 65.2-kg

81. ## physics

you are driving your new car 14.0m/s east when you slam on your brakes to avoiavoid having your first collision. The force of friction on your car tires is 1.5kN and the combined mass of your car is 1200kg. Detemine the (a). direction of the frictional

82. ## PHYSICS

(a) how long it took King Kong to fall straight down from the top of a 210 m high building s (b) his velocity just before "landing"

83. ## arithmetic

How is eight hundred twenty-six thousandths written in decimal form?

84. ## Physics 1

A crate of mass 48 kg is pushed up a frictionless ramp by a person as shown in the figure below. Calculate the work done by the person in pushing the crate a distance of 11 m as measured along the ramp. Assume the crate moves at constant velocity. _____J

85. ## Physics 1

A car is pushed along a long road that is straight, horizontal, and parallel to the x direction. a)The horizontal force on the car varies with x as shown in the figure. What is the work done on the car by this force? (Let a = 100 N.) _____J b)What is the

86. ## Precalculus

A barn has 150 feet of fencing and there are 3 rectangular corrals of identical dimensions along the back wall of the barn. The sides of each corral are attached to the barn and fencing is not needed along the back wall of the barn. If each corral is 30

87. ## Science

How much time is required for reflected sunlight to travel from the Moon to Earth if the distance between Earth and the Moon is 3.85 x 10 to the 5th exponent?

88. ## Chem Lab

I did a chem lab and have to figure out some stuff off of some data I found during the lab Weight of empty crucible and cover: 19.74 g Weight of crucible, cover and hydrated salt: 22.74 g Weight of crucible, cover and hydrated salt after 1st heating: 22.13

89. ## Precalculus/Trig 6

Find the exact value of the following trigonometric functions: sin(13pi), cos(14pi), tan(15pi)

90. ## calculus

Let f be the function defined by f(x)= sqrt(x), 0

91. ## dynamics

a series of small packages are being moving by athin conveyor belt that passes over a 300mmradiusidler pulley.the belt starts from rest at time t=0 and its speed increses at a constant rate of 150mm/s*2.knowing that the coffient of static friction between

92. ## Social Studies 8R - Help!!!!

How do you think the growth of the Cattle Kingdom affected the Plain Indians? Answer - Sometimes, there were conflicts on the range. Since water was scarce, ranchers battled over the rights to water holes and streams. When sheepherders moved onto the

A 85.0 kg base runner begins his slide into second base when he is moving at a speed of 2.10 m/s. The coefficient of friction between his clothes and Earth is 0.570. He slides so that his speed is zero just as he reaches the base. (a) How much mechanical

94. ## English

Word box: barrage bigot designate diversity enigma gloat global illusion infuriate motivate pacifist queue restrict sage slake terrain vocation vow waylay wither Choose the word that is the same or most nearly in the words in parenthesis 1. A dirty look

95. ## Math

When a truckload of apples arrives at a packing plant, a random sample of 250 is selected and examined for bruises, and other defects. The whole truckload will be rejected if more than 5% of the sample is unsatisfactory. Although it is not known, in fact

96. ## physics

daredevil jumps 10m wide. he drives a car up a 11 degree incline. what was minimum speed to clear the 10m? acceleration is 9.81

97. ## English

Reach each sentence then underline the intransitive verb. If a sentence has no intransitive verb write none. 1. Tell Rover to lie down and relax. Lie and down intransitive 2.Lay your cards on the table. none 3.A squirrel got trapped in our attic trapped

98. ## dynamics

cars A and B are d=60m apart and traveling respectively with constant speeds v1=32km/h and v2=24km/h on an ice covered road.knowing that 45s after driver A apples his breaks to avoid overtaking car Bthe two cars collide,determine a)the uniform deceleration

99. ## physics

an american bald eagle heads south at 3.2 m/s, but encounters a wind blowing from the east at.97 m/s by how many degrees will she be blown off course?

100. ## physics

A catcher stops a 48.5 m/s pitch in his glove, bringing it to rest in 0.15 m. If the force exerted by the catcher is 803 N, what is the mass of the ball?

101. ## TEACHER'S AIDE

Larry is a very aggressive four-year old child. He watches many television programs that contain violence. It's most likely that. A. He will become overactive, B. He will become depressede, C. his behavior won't change, D. His behavior will become more

102. ## Social studies

I have an assignment that says "Draw Marco Polo's Route through the silk road and i was hoping you could send me a link that shows his path there and back. Thanks, :)

103. ## physics

Betty Bodycheck (mB = 51.4 kg, vB = 22.0 km/h in the positive x-direction) and Sally Slasher (mS = 42.4 kg, vS = 28.0 km/h in the positive y-direction) are both racing to get to a hockey puck. Immediately after the collision, Betty is heading in a

104. ## University Physics

Betty Bodycheck (mB = 60.3 kg, vB = 22.0 km/h in the positive x-direction) and Sally Slasher (mS = 44.5 kg, vS = 28.0 km/h in the positive y-direction) are both racing to get to a hockey puck. Immediately after the collision, Betty is heading in a

105. ## Chemistry

100 g of a clear liquid is evaporated and a few grams of white crystals remain. the original liquid was a..? Please help.

106. ## ALG 2!!!

write an equation in slope-intercept form for the line described. slope 3,y-intercept at -4

107. ## Calculus

Write an equation of the line that passes through the point (i) parallel to the given value, and (ii) perpendicular to the given line. Point(7,1) Line(-5x-5y=90)

108. ## English

4. Read the following passage from “The People Could Fly”: The slaves labored in the fields from sunup to sundown. The owner of the slaves callin himself their Master. Say he was a hard lump of clay. A hard, glinty coal. A hard rock pile, wouldn’t be

109. ## physics

Help! Two charges are placed on the x axis. One of the charges (q1 = +8.71C) is at x1 = +3.00 cm and the other (q2 = -28.6C) is at x2 = +9.00 cm. Find the net electric field (magnitude and direction given as a plus or minus sign) at (a) x = 0 cm and (b) x

110. ## Living Environment

How one type of atom (carbon)can be the basis of so many types of biomolecules?

111. ## Math

In a middle school 5th grade class there are 5 girls for every 4 boys. all together the class has 27 students. How many boys are in the class?

112. ## MATH WORD PROBLEMS

JORGE DREW AN ARRAY WITH ONE COLUMN AND 2 ROWS. HOW MANY TILES ARE IN JORGE'S ARRAY?

113. ## Statistics

When a truckload of apples arrives at a packing plant, a random sample of 250 is selected and examined for bruises, and other defects. The whole truckload will be rejected if more than 5% of the sample is unsatisfactory. Although it is not known, in fact

114. ## ap chemistry

A sample of gas in a cylinder of volume 4.2 L at 316 K and 2.68 atm expands to 7.21 L by two different pathways. Path A is an isothermal, reversible expansion. Calculate the work for Path A. Answer in units of J Path B has two steps. In the first step, the

115. ## physics

A student has just started pulling hard enough for a crate to start accelerating into motion. At that particular instant, what is the net force on the crate if the force of friction has magnitude 200 N and the applied force is 225 N?

A 2300. kg car starts from rest and accelerates uniformly to 24.0 m/s in 24.0 s. Assume that air resistance remains constant at 510 N during this time. Find (a) the net force on the car b) the average power developed by the engine? c) the instantaneous

117. ## Chemistry

M2CO3 ( M is a metal) 5,22 g dissolved in H2O and reacted with HCl CO3(-2) (aq) + 2H+ (aq) --> CO2 (g) + H2O (l) CO2 produced and collecting over H2O . 2.0L at 25 C P= 475 mmHg Vapour pressure of H2O at 25 C = 23,8 mmHg Then Which metal is M ?

118. ## ALG 2!!!

write an equation in slope-intercept form for the line described. perpendicular to y=one over two times a number minus one,x-intercept at 4

119. ## Physics

A speed skater moving across frictionless ice at 9.0 hits a 5.1 -wide patch of rough ice. She slows steadily, then continues on at 6.4 . What is her acceleration on the rough ice?

120. ## physics

when a car drives off a cliff why does it ratate forward as it falls?

121. ## math

at what times are all the digits shown by a digital clock the same?

122. ## chemistry

What happens if the water hoses are incorrectly attached in a distillation apparatus - i.e. the water in and water out are switched?

123. ## Jr. Math

I biked 3/8 the distance from my school to my home. If I have 10 miles to go, how many miles have I gone. My answer is, 24 miles, am I correct. Thanks

124. ## Algebra

Susan drove for 2 hours at 85 km/hr and then for 3 hours more at 95 km/hr. What was her average speed for the entire trip?

125. ## Physics URGENT!!!

A sled loaded with bricks has a total mass of 18.0 kg and is pulled at constant speed by a rope inclined at 40.0o above the horizontal. The sledge moves a distance of 16.0 m on a horizontal surface. The coefficient of kinetic friction between the sledge

126. ## Math

on monday 1/5 of the students went on a field trip. on tuesday 5/8 of the students that didn't go on monday had the opportunity to go. what is the fraction of students that didn't go?

127. ## Algebra

A grocer mixes 5 lb of egg noodles costing \$ .80/lb with 2 lb of spinach noodles costing \$1.50/lb. What will the cost per pound of the mixture be?

128. ## math

936 divided with 0.12 Please show me the process but not simple division

129. ## Precalc/Trig 1

What equation would you use to show that the point ((square root of 11)/(6), (5/6))is on the unit circle?

130. ## English

Reach each sentence then write each transitive verb. If a sentence has no transitive verb write none I wonder why Maria looks so happy none I love sunny days like this none Julios parents just opened a restaurant downtown opened? My mom gave me an early

131. ## chemistry

Over an interval of 1second (s) the mass of Mg(s), in the reaction below, changes by -0.011g. What is the corresponding rate of consumption of HCl(aq) in mol/second (mol/s). Mg(s) + 2HCl -> MgCl2(aq) +H2(g)

132. ## physics

(from Arons) Cars A and B travel along the same straight track. Car A is located at position s= 0.20 m at clock reading t= 0.0 s, and it maintains a constant speed of v= 0.17 m/s. Car B is located at position s=0.0 m at clock reading t= 0.04 s, and it

133. ## Math

From experience, the manager of Kramer's Book Mart knows that 30% of the people who are browsing in the store will make a purchase. What is the probability that among ten people who are browsing in the store at least seven will make a purchase?(round

134. ## physics

A car accelerates uniformly in a straight line from rest at the rate of 3.2 m/s2. What is the speed of the car after it has traveled 58 m? Answer in units of m/s How long does it take the car to travel 58 m? Answer in units of s

A sled loaded with bricks has a total mass of 18.0 kg and is pulled at constant speed by a rope inclined at 40.0o above the horizontal. The sledge moves a distance of 16.0 m on a horizontal surface. The coefficient of kinetic friction between the sledge

136. ## Algebra

A chemist has 40 ml of a solution that is 50% acid. How much water should be added to make a solution that is 10% acid?

137. ## Calculus

Find the second derivative of the function. g(x)=x^6secx

138. ## General Chemistry

I add 5 drops Potassium Iodide (KI) to 5 drops lead nitrate (PbNO3). The solution is centrifuged and the aqueous layer is discarded. I then add 5 drops of nitric acid (HNO3), 5 drops of hydrogen peroxide and 10 drops of dichloroethane (C2H4Cl2) to the

139. ## Physics

On a hot day in summer, your friends decide to go rafting down a local river. Since you are afraid of water, your job is to provide them with refreshments from a bridge as they pass. When the first raft is 10 meters away, traveling at 3.5 m/s, you drop a

140. ## calculus

Find an equation of the tangent line to the curve at the given point. y= (1+3x)^12 , (0,1) and find y' and y" y=cos(x^2) I got y' = -2xsin(x^2) i keep trying to get double prime but everything i try isnt working.

141. ## English

Read each sentence Then write each verb and label it transitive or intransitive 1.Luis calls his grandmother every week calls-t 2.Pablo talks to his grandmother once a month. talks-i 3.Sheryl and I biked through the park biked-i 4.Lance and Casey rode

142. ## Calculus: free body diagram--PLZ HELP!=)

Grain is being poured through a chute at a rate of 8 cubic feet per minute and forms a conical pile. The radius of the bottom of the pile is always half of the heightof the pile. How fast is the circumference of the base increasing when the pile is 10 feet

143. ## Economcis

Is GDP calculated by the price of the good with the indirect tax or the price of the good before the indirect tax? For example, if an economy only produces a single \$10 good and it is taxed 10%, is GDP \$10 or 11\$? Thanks!!!

144. ## Biology

A group of natural populations that are reproductively isolated from other such groups and which interbreed or could interbreed with each other is called a... a. biological genus. b. natural family. c. biological species d. biological phylum.

145. ## physics

an american bald eagle heads south at 3.2 m/s, but encounters a wind blowing from the east at.97 m/s by how many degrees will she be blown off course?

146. ## Math

What are the base-five numbers for the base-ten counting numbers 1 to 26?

suppose you have ABC with AB=5, BC=7, and CA=10, and also EFG with EF=900, FG=1260, and GE=18/00. are these triangles similar, and if so what is the scale factor?

148. ## Physics 1

A crate of mass 42 kg is pushed across a level floor by a person. If the person exerts a force of 20 N in the horizontal direction and moves the crate a distance of 11 m, what is the work done by the person? _____J

149. ## college chem

Mg and O lab how will the relative number of moles of mg and o be affected if the following procedural errors are made? a)crucible is not brought to constant mass before the Mg is added. b)water is not added after the first heating of Mg, and the entire

150. ## Algebra

If you drive for 2 hours at 80 mph, how fast must you drive during the next hour in order to have an average speed of 75 mph?

151. ## calculus help!!!!

Find derivative of: g(theta) = cos^2(2theta-1)

152. ## science

I dissolved two different white solids into water. One solid dissolved and gave off heat and the other became cold. Reading various texts online, I was not sure if these were physical or chemical changes. Some texts say if these solids are salts then these

153. ## Math

Benny plays two sports. He plays soccer for 3/4 of the time and plays baseball for 30 minutes. How many more minute does he play soccer than baseball. My answer is 23 am i correct.

154. ## college stats

A study wants to examine the relationship between student anxiety for an exam and the number of hours studied. The data is as follows: Student Anxiety Scores Study Hours 5 1 10 6 5 2 11 8 12 5 4 1 3 4 2 6 6 5 1 2 Why is a correlation the most appropriate

155. ## Math

There are 4 more girls in Mrs. Chang's class than Mr. Blackwell's class. Five girls moves from Mr. Chang's class to Mr. Blackwell's class. Now there are twice as many girls in Mr. Blackwell's class as there are in Mrs. Chang's. How many girls were in Mr.

Q:William practiced guitar 1 1/3 hours on monday and 5/6 hour on tuesday. How many total hours did he practice? A: A) 1 1/2 B) 1 2/3 C) 2 1/3 D) 2 1/6

157. ## calculus

Find all relative extrema of the function. (Enter NONE in any unused answer blanks.) f(x) = x4 – 8x3

158. ## Physics 1

Two railroad cars, each of mass 2.2 104 kg, are connected by a cable to each other, and the car in front is connected by a cable to the engine as shown in the figure below. The cars start from rest and accelerate to a speed of 1.7 m/s after 1 min. a)Find

159. ## Physics

Betty Bodycheck (mB = 60.0 kg, vB = 22.0 km/h in the positive x-direction) and Sally Slasher (mS = 46.3 kg, vS = 28.0 km/h in the positive y-direction) are both racing to get to a hockey puck. Immediately after the collision, Betty is heading in a

160. ## Percentage

The usual price of a suitcase was \$100. During a sale, a 13% discount was given. Mr Lee bought the suitcase but had to pay 7% GST on the selling price. a.) What was the selling price of the suitcase? b.) How much did Mr Lee pay for the suitcase?

161. ## Chemistry

E(V) for half reaction 3N(-1/3) -> 3 N(0) + e-

162. ## Precalculus/Trig 3

The degree measure of an angle theta is 40 degrees. What is the radian Measure of theta? at what point P does the terminal ray intersect the unit circle (what is the ordered paid P(____, ___)?

163. ## Math

How would u solve this problem, one box holds 16 crayons. Another box holds 24 crayons. Write a sentence using words that compares the crayons in the two boxes.

164. ## Chemistry

Boric acid is a weak acid with an equilibruim constant(K)of 10-9.3. What is the pH balance of a 0.1 molar solution of boric acid?

165. ## math

How do you solve 8x^3-24x^2+12x-4=0?

166. ## Physics

An American bald eagle heads south at 5.5 m/s, but encounters a wind blowing from the east at 1.9 m/s. By how many degrees will she be blown o course?

167. ## algebra 2

Samantha needs to solve the equation x2 - 12x = 40. What must she do to each side of the equation to complete the square?

168. ## Physics

An object is thrown vetically upward with an initial velocity of 14.7 m/s.How long does it take for the object to be 9.8 m from its initial position?What is the instantaneous velocity at 9.8 m from its initial position. Explain why two answers arise.

169. ## social studies

Fran's little girl, Fifi, is a real tomboy. Fran asks you to explain why Fifi prefers rough play, boys' clothing and toys, and the company of boys to the company of girls. You believe in the biological explanation of gender development, so you will tell

170. ## Physics

A battery with EMF 6.0 Volts and internal resistance 0.1 ohms is connected by a long wire to a resistor R = 8.0 ohms. The wire goes around a solenoid. The solenoid has 4000 turns per meter and area 25 cm^2. a) If the current in the solenoid is I = 200 Amps

171. ## Math

What is the dervative of ((x+sin(2x))/(x-sin(2x)))^7?

172. ## college math

ok this is the last question i need help on. Abigail just received an inheritance from her grandfather's estate. She will be entering college in 1 year and is expecting to need \$3,000, \$5,000, \$4,000, and \$4,500 respectively at the beginning of each of the

Give me a sentence with macrame?

174. ## math

there exists a two digit integer, "AB", such that AB=2(A+B)squared. what is the value of the product A x B?

Underline each variable IV ABOVE THE INDEPENDENT VARIABLE DV ABOVE THE DEPENDANT VARIABLE 1.How will Product x affect the life if cut flowers. 2.What is the effect of different amounts of oxygen on the rate of yeast growth. 3.Does the number of bees affect

176. ## gas

water shoots from the mouth of a tall gargoyle fountain straight into the air with an initial velocity of 37 feet per second. It take the water 5 seconds to travel through the air and actually falls past the point from which it came, splashing down onto

177. ## math

A circular lake is 30 miles across at its widest point. What is the area of the lake in acres? Round your answer to the nearest tenth of an acre.

178. ## Physics

For the case of freefall, explain how to calculate the total distance traveled and the instantaneous velocity for an object that is dropped from rest by applying the fundamental meaning of acceleration and by using the two equations: Vav+(vf+vi)/2 and

179. ## chemistry

complete and balance Co(OH)3(aq)+Na2CO3(aq)

180. ## English

Luis calls his grandmother every week. Is this intransitive.

181. ## science

why do plants cell have rigid cell walls while animals cells don't have

182. ## college math

Raisel borrowed money from Irlene and agreed to pay back \$400 today and \$300 in 5 years. If Raisel has a lot of money available now and wants to pay back the loan today, how much money would she have to pay Irlene if the loan was at 6.75% compounded

183. ## Finite

Assume that the coin is weighted so that Pr[H] = [ 1/11], and that it is flipped 9 times. The random variable X is defined as the number of heads in the 9 flips. What is E[X]?

184. ## spanish

can anyone help me say hi my name is Allysiah i need help i don't no how to talk in spanish

185. ## College Algebra

The ratio of the surface area of a solid cube to its volume is 4 to 1. The diagonal of the cube is?

186. ## Algebra

A 5 ft man cast a shadow of 3 ft standing next to a 22ft building. How far is the man standing from the building?

187. ## Physics!!!

A 2300. kg car starts from rest and accelerates uniformly to 24.0 m/s in 24.0 s. Assume that air resistance remains constant at 510 N during this time. Find (a) the net force on the car b) the average power developed by the engine? c) the instantaneous

188. ## math

Ms. Dixon sees more than 119 birds but fewer than 132 birds. How many birds might she have seen?

189. ## principles of management

Imagine that you were the CEO of Apple computer. Recognizing the importance of developing strategies to adapt to environmental and economic uncertainty, what steps would you take to scan your business environment? Can you keep track of all aspects of the

190. ## math

ratio of 3/2 boys and girls 12 boys in class how must girls is

191. ## Human Services

Write a 1,050- to 1,400-word paper in which you identify the following: • The range of problems facing human services clients • The specific helping skills that can be used with clients

192. ## Calculus

arcsinxy = 2/3 arctan4x find dy/dx at the point (1/4, 2)

193. ## Precalculus

A barn has 150 feet of fencing and there are 3 rectangular corrals of identical dimensions along the back wall of the barn. The sides of each corral are attached to the barn and fencing is not needed along the back wall of the barn. If each corral is 30

194. ## college math

1. Rebecka borrowed \$500, \$5,000, \$3,500, and \$2,000 from her dad on September 1 of each of four successive years for college expenses. Rebecka and her dad agreed to a loan at the rate of 3.50% compounded monthly. If it is now 1 year from the last day that

195. ## Math

What is 1/4,4/7,1/2 from least to greatest?

196. ## law and ethics

Review the latest transplant news and attempt to break down costs. Review the benefits of money being used for the transplant versus other places in society for the common good. Form personal opinions on these issues.

197. ## anatomy/physiology I

Why is proper microscope technique important for studying Anatomy and Physiology?

198. ## Calculus

Given F(2)=1,F'(2)=5,F(4)=3,F'(4)=7 and G(4)=2,G'(4)=6,G(3)=4,G'(3)=8, find: a)H(4)if H(x)= F(G(x)) b)H'(4)if H(x)= F(G(x)) c)H(4)if H(x)= G(F(x)) d)H'(4)if H(x)= G(F(x)) e)H'4 if H(x)= F(x)/G(x) Please Help!

199. ## math

I need help with this trig problem cotθ=-√3/3 and 3/2π≤θ≤π, find θ

200. ## Communication

Which of the following is NOT a technique for emphasizing material in a resume? A. Presenting it in vertical lists B. Including it as part of a lengthy paragraph C. Offsetting it with white space D. Positioning it as the top of a page

201. ## Physics

A sled is set in motion on a frozen lake. If friction and air resistance are neglible, how much force is required to keep the sled moving at a velocity of 12 m/s?

202. ## Writing

I need help coming up with a thesis statement about how the most important transformation/change during the progressive era was the creation of institutions by activists.

203. ## Oral Book Report: Punctuation of the title

When I name a title, like for example: The Battle of the Labryinth.- Do you capitalize O for of and T for the?

204. ## eng

but is a comparison or a contrast

205. ## calculus derivative HELP!

Find the derivative of: y=2sqrt(x)-(1/x)

206. ## CALCULUS

Find derivative of: g(theta) = cos^2(2theta-1)

207. ## Social Studies

How does Government contribute to the prosperity of England?

208. ## SCI207

Sustainable development requires (Points : 1) one set of values and goals that will inspire change. a specific definition to be successful. less critique and debate. participation of diverse stakeholders and perspectives.

209. ## math

give reasons why learning tool 12, the multiplication table, is a table.

210. ## physics

How long does it take a rocket to change its velocity by 57 m/s while accelerating at 53.7 m/s2? Round your answer to 2 decimal places.

211. ## Calculus

lim y->2 (sqrt(y+2)-2)/(y-2)

212. ## Math

a) Find the product (1/2x2+y2) x-y b) Simplyfy 5/3a2b x (-3/4ab3) x (-4/5a2b2) and find the value for 2= -2 and b= 1. c) Divide x (5x2 - 80 by 5x (x+4). Thanks in anticipation.

213. ## math

The product in the row for 6 are double the products in the row for 3 is it true or false

214. ## Statistics

if it can be assumed that 39.5% of all telephone #'s are unlisted, and that all telephone #'s are independent,find the probability that at least 1 of 5 telephone numbers are listed.

215. ## Math

What is the dervative of ln(small 3 square root of (x^2)-3x+1)? Is it (2x-3)/3(ln(x^2)-3x+1)^(2/3)?

216. ## Word Problem

In a certain individual the resting diastolic pressure at time t is given by B(t)= 80+7sin((pi)(t)/(12)) where t is measured in hours since midnight and B(t) in mmHg (millimeters of mercury). Find this person's pressure at 6:00 am, 10:30 am, noon, and 8:00

217. ## algebra

simplify the expression. Justify each step. (m+4.5)-0.5

218. ## physics

A 1720-kg car is traveling with a speed of 15.0 m/s. What is the magnitude of the horizontal net force that is required to bring the car to a halt in a distance of 47.0 m?

219. ## Calculus

if you have g(x)=ln(x^10)+e^ln(x) would you just get 1/x^10+e^ln(x) or am i wrong the way it was explained to me that with e the derivative is just wat it is you don't change it

220. ## Algebra

sorry, having a brain malfunction but which is a function: "x is a student y" "x is the biological daughter of mother y"

221. ## Eco 372

Why doesn’t the U.S. simply restrict all goods coming in from China? Why can’t the U.S. just minimize the amount of imports coming in from all other countries?

222. ## Physics

A balloon carrying a basket is descendign with a constant acceleration of g/3. the total mass of the basket and contents is mB.you see water below and decide you need to throuw out some mass to allow the basket to rise and not hit the water. how much mass

223. ## math

amee, ben, carly, and darrien are friends. darrien has no money. amee gives darrien 1/4 of her money. ben gives darrien 1/5 of his money. carly gives darrien 1/3 of her money. each person gave darrien the same amount. what fraction of the groups total

224. ## World History

What number was the children's crusade and why was it fought?

225. ## Howard cattle

A number has more tens than ones, but the digit in the tens place is less than 4 .the value of the ones is digit is less than 3 .what are the possible numbers?

226. ## High School, Pre Algebra

-1 3/7* (-3 2/3) A. 3 2/7 B. -5 5/21 C. 11 D. 5 5/21 I got A , but then I tried figuring it out again and I think the denominator is 21

227. ## Math Calculus

Suppose g(x) = 6x arctan (ln x/(x^3+2)) Plot y = g(x) in the square window deﬁned by 0 ≤ x ≤ 2 and −1 ≤ y ≤ 1. Also plot the secant lines connecting (1, g(1)) and (1 + h, g(1 + h)) for h = .5 and h = .25 in the same window. Give a table of

228. ## South America

Amok (murderous raging) in Malaysian culture, susto (e.g., spirit attack) in Latin America, and fright in Caribbean Creole are all examples of

229. ## physics

find the power by a man if he runs at constant speed of 5km/h along an ascending road which makes 5 degree with the horizontal if the mass of yhe man is 60 kg.

230. ## chemistry

give the 500 compounds bond line structure and struture and name with formula as well as common name

231. ## algebra2

find each product (4a+1)(a-4)

232. ## practical biology

need a help for investigatory project i want a practical topic for this project. can anybody help me out? pls reply fast!!!

233. ## Bachelor in Science

If I takeB achelor in Science How many years it will take and what field it relates to?

234. ## ELEMENTARY

How to prepare PSAT test from 3rd grade

235. ## Critical Thinking/Ethics

A worker came to the employer and admitted to stealing money from the firm for personal use. What could the employer do now (to regain lost revenue, employee loyalty, corporate image, etc.)? (List 3 ways to solve this problem)

236. ## math

what property of addition is shown in the following number sentence? 7+(3+5)=(7+3)+5

237. ## Social studies

places that have the same or common characteristics are referred to as.

239. ## social studies

Because/Even though children’s understanding of AIDS increases with age: A. AIDS education should not be attempted before adolescence. B. relatively young children can still grasp complex scientific concepts about disease. C. children in grades K-6

240. ## Sociology

Identify, specifically, the ethical issue and the ethical problems it presents. Drawing on various sources, explain how one of the classical theories (utilitarianism, deontology, virtue ethics) would resolve the problem. Then, contrast this response with

241. ## Grammar

Which one would be correct? "We have to answer the question, right?" "We have to answer the question right?" Thank you.

242. ## Math

Ms. Kenny grew 3/5 as many zinnias as Mr. Hadam. If Ms. Kenny has 12 zinnias, how many zinnias do they have in all. I calculated that they have 20 zinnias total. Am I correct. Thanks

243. ## Calculus

Find the slope of the graph of the function at the given value. h(z)=z^(2/7)-z^(5/8) when z=7

244. ## chemistry

why does a gas convert directly to liquid without passing through the solid state

245. ## Pre-Calculus

Exponential Functions This is my equation that models the accumulated amount (A) at any time t. A = 1000(1+0.08/12)^t*12 ^ How do I plot that into the graphing texas instruments calculator? What I do I type in the y-axis?

246. ## Calculus

lim y->2 (sqrt(y+2)-2)/(y-2)

2x+3=7

248. ## Math

What is the implicit differentiation of x+y^2=cos(xy)?

249. ## time and stress management

if you have to many tasks to complete at work ,you should (a)take a deep breath and start at the top of the pile and work your way down as quickly as possible (b)complain to your boss that its an inreasonable amount of work (c)decide for yourself what is

250. ## Math

Come up with an expression for a function f such that the domain of f is all real numbers, lim (f(x) = 3) as x approaches 2 and f(2) = 3.

251. ## Physics Circular motion

A car starts from rest on a curve with a radius of 110m and accelerates at 1.2m/s^2. Through what angle will the car have traveled when the magnitude of its total acceleration is 2.1 m/s^2? I thought i got the answer which was 0.75 rad or 43 degrees but it

252. ## math

ratio of 3/2 boys and girls 12 boys in class how must girls is

253. ## Math

What is the dervative of e^((5x^2)+(3x)-(7))? Is it (10x+3)(e^((5x^2)+(3x)-(7))) or 10x+3(e^((5x^2)+(3x)-(7)))

254. ## math

using approximation which is greater 31/130 or22/75

5/7+1/7

256. ## trig

two intersecting sides are 250ft and 170ft, angle between is 55 degrees. use the 250ft side as the base, what is the height of the triangle

5/21.(-7/15)

5-(6+2).2

259. ## English

1. Which sentence describes setting? As much as it saddened her, the first thing Nan had to do was leave her beloved family home. Marcy wanted to go to the dance, but Rob’s treatment of her that day gave her second thoughts. Steve was fairly short, with

260. ## math

____ inches or 12 yards is the width of a tennis court

261. ## english

Can you give me a short story in narrative form using these words:renounced, swaggering, raucous, insolently, simultaneously, incredulously, cynically, maneuvered, deprived, haggard, institution, reformation.

262. ## literacy

which search engine would be best to use for a broad search for scholarly literature

asked by which of the following is an article from a popular magazine
263. ## history

how important were federal policies for the expansion of the industrial economy between 1865 and 1900

264. ## calculus derivative

find the derivative of: y=(x/(x+1))^3

265. ## College Physics

Okay so the acceleration g on this planet X is 15 m/s^2 I have solved for all answers but this one. How long would it take the object to reach a height of 14.1 ? For an object thrown upward there are two times it would be at any hieght. Give the going up

266. ## Precalc/Trig 2

The point P lies in the 4th quadrant and is located on a circle of radius 2. Find the missing coordinate for P. (___, (negative square root of 3)).

267. ## algebra2

if a=5 and b=-3 4a-3b

268. ## Math

6.9*10^-13=((2x)^2/(1-x)(2-2x)^2 solve for x

269. ## Econ

what is the purpose of the labor law- executive order- created in 1965