1. physics

I am having great difficulty with this question. A block is placed on a frictionless ramp at a height of 12.5 m above the ground. Starting from rest, the block slides down the ramp. At the bottom of the ramp, the block slides onto a frictionless horizontal

2. Pre-Calc

1.) Suppose that y varies directly as x. If y is 5 when x is 30, the constant of variation is 150. True Or False 2.) If w varies directly as z and w = 9 when z = -6, find w when z = 3. 3.) If y varies directly as x and y = 2 when x = 4, find x when y = 4.

Tony and Alice are trying to reduce the amount of television they watch. For every hour they watch television, they have to put \$2.50 into savings. The table shows how many hours of television Tony and Alice have watched in the past two months. Tony watch

4. Physics

The drawing shows two boxes resting on frictionless ramps. One box is relatively light and sits on a steep ramp. The other box is heavier and rests on a ramp that is less steep. The boxes are released from rest at A and allowed to slide down the ramps. The

5. Math

Four times the sum of a number and 15 is at least 120. Let x represent the number. Find all possible values for x. A. x ¡Ý 26 B. x ¡Ý ¨C15 C. x ¡Ý 15 D. x ¡Ý ¨C26 I tried it and cant find it.

6. physics

A golf club strikes a 0.040-kg golf ball in order to launch it from the tee. For simplicity, assume that the average net force applied to the ball acts parallel to the ball’s motion, has a magnitude of 7950 N, and is in contact with the ball for a

7. Chemistry

Freon-12 is formed as follows: 3 CCl4 + 2 SbF3 -> 3 CCl2F2 + 2 SbCl3 150 g tetra chloromethane is combined with 100 g antimony (III) fluoride to give Freon-12 (CCl2F2). Identify the limiting and excess reagents, and calculate how many grams of Freon-12 can

Please help with the following: Dani wants to measure the volume of a pebble. Which tool will give the most accurate measurement? A. a ruler B. a tablespoon C. a measuring cup D. a graduated cylinder I think the answer is mostly D. Is this correct? Please

9. Physics

(II) Every few hundred years most of the planets line up on the same side of the Sun. Calculate the total force on the Earth due to Venus, Jupiter, and Saturn, assuming all four planets are in a line, Fig. 5–44. The masses are mV = 0.815 mE, mj = 318 mE,

10. geometry

For every 10 yards on a football field, there is a boldly marked line labeled with the amount of yards. There are two parallel sidelines on each side of the field. If the 50 yard line is perpendicular to one of the sidelines, what is its relationship to

11. math

eva wants to make two pieces of pottery.she needs 3/5 pound of clay for one piece and 7/10 pound of clay for the other piece.she has three bags of clay that weigh 4/5 pound each.how many bags of clay will eva need to make both pieces of pottery?how man

12. math

Astronomers sometimes use angle measures divided into degrees, minutes, and seconds. One degree is equal to 60 minutes, and one minute is equal to 60 seconds. Suppose that

13. Chemistry 30

50.0 mL of 0.200 M NaOH neutralized 20.0 mL of sulfuric acid. Determine the concentration of the acid. Show a balanced chemical equation, all work, and the answer rounded to three decimal places.

14. math

divide 15 into thirds and subtract from 14 divide in half

15. Physics

To give a 20-kg child a ride, two teenagers pull on a 3.6-kg sled with ropes, as indicated in the figure. Both teenagers pull with a force of 55 N at an angle of 35 ∘ relative to the forward direction, which is the direction of motion. In addition, the

16. Math

The depth d in feet of the water in a bay at is given by d(t) = 3/2 sin (5πt/31) + 23 where t is time. Graph the depth of the water as a function of time. What is the maximum depth of the water to the nearest tenth of a foot?

17. Math Help!!

3. Which one of the following pairs of numbers contains like fractions? A. 6/7 and 60/70 B. 1/2 and 3/2 C. 4/8 and 12/16 D. 5/4 and 4/5 17. Which of the following pairs of numbers contain like fractions? A. 5/6 and 10/12 B. 6/7 and 15/7 C. 3/2 and 2/3 D.

18. Spanish

Sra. are my answers correct? Thank you so much for your time. Part I El condicional. Llene el espacio con la forma condicional del infinitivo dado. ¡Cuidado! Los acentos son importantes. 1. Mi esposo y yo _______ contigo, pero no nos sentimos bien. (IR)

19. Physics

A 0.60-kg basketball is dropped out of the window that is 6.1 m above the ground. The ball is caught by a person whose hands are 1.2 m above the ground. (a) How much work is done on the ball by its weight? (b) What is the gravitational potential energy of

20. physics

A crate rests on a flatbed truck which is initially traveling at 17.8 m/s on a level road. The driver applies the brakes and the truck is brought to a halt in a distance of 33.1 m. If the deceleration of the truck is constant, what is the minimum

Please help me with the following: Which of the following statements most accurately describes the difference between 3x^0 and (3x)^0, if a difference exists? A. There is no mathematical difference between 3x^0 and (3x)^0. The two are equivalent

22. Math

When buying gasoline, you notice that 14 gallons of gasoline is approximately the same as 53 liters. Use this information to find a linear model that relates gallons to liters. Then use the model to find the number of liters in 25 gallons. Round your

23. Physics

The hare and the tortoise are at the starting line together. When the gun goes off, the hare moves off at a constant speed of 10 meters per second. (Ignore the acceleration required to get the animal to this speed.) The tortoise starts from a dead stop,

24. English

In the following literature selections,individuals experience rites of passage in various ways: The Bass, the River and Shelia Mant by W.D. Wetherell Oranges by Gary Soto I Know Why the Caged Bird Sings by Maya Angelou First Lesson by Philip Booth On

25. ph

A gymnast is swinging on a high bar. The distance between his waist and the bar is 1.15 m, as the drawing shows. At the top of the swing his speed is momentarily zero. Ignoring friction and treating the gymnast as if all of his mass is located at his

26. Physics

A 2.87 kg object initially moving in the positive x-direction with a velocity of +4.87 m/s collides with and sticks to a 1.96 kg object initially moving in the negative y-direction with a velocity of -2.55 m/s. Find the final components of velocity of the

27. Math

Lucas says that since 40x70 and 60x50 both have factors with a total of two zeros, they will both have products with a total of two zeros. Is this correct? Explain. 40x70=2800 and 60x50=3000. They both have zeros in the answer. Right

28. physics

A net force of 5.34 N acting for 4.23 s on a mass initial at rest, causes it to travel 4.75 m in a straight line. What is the mass?

A large department store has been attaching tags with barcodes to merchandise, and employees use barcode readers to scan merchandise at the cash register. However, the wireless barcode readers need new batteries often. Also, using this system for inventory

30. Math Help!!

13. Simone has 5 employees in her flower shop. Each employee works 6 4/15 hours per day. How many hours, in total, do the 5 employees work per day? A. 30 B. 28 C. 31 1/3 D. 30 2/3 6 4/15 * 5 = 31 1/3

31. essay

can anyone help me to check my essays for penn foster ? please!! i wrote it my penn foster returned it. if anyone anyone increase the word and edit my mistake!

32. Chemistry

Silver chromate may be prepared by the following reaction. 2 AgNO3(aq) + K2CrO4(aq)  Ag2CrO4(s) + 2 KNO3(aq) Calculate the mass of silver chromate produced when 0.623 L of 1.345 M silver nitrate is reacted with 245 mL of 1.89 M potassium chromate.

33. statistics

Why are unbiased estimators preferred over biased estimators?

34. LA

Which of the following has a meaning similar to inevitable? expected*** avoidable unpredictable uncertain Which sentence uses the past participle of the verb bring? I have brought my diary with me every day except today. I brought my diary with me

35. History

"He that will not work, shall not eat." Which problem of colonial America is John Smith addressing in this statement? -Arriving colonists focused most of their time on finding gold. -Indentured servants and slaves often rebelled against their unfair

36. Int. science

Which of the following is an example of a cycle theme in science? seasons electrons and protons the solar system relationship between plants and animals

37. Chenistry

Be able to calculate the pH of a solution prepared by mixing 50.0mL of 0.200M NaH2PO4 (pKa2=7.20) with 50.0mL of 0.120M NaOH. I did work out a pH of 7.38 but I am not sure if i need to take into account any dilution of the mixing of solutions and do you

38. physics

A snowmobile is pulling a large sled across a snow-covered field. The weight of the sled is 3560 N. If the coefficient of friction of the sled is 0.12, what is the pulling force supplied by the snowmobile?

39. pre calculus

Use Hooke's Law for springs, which states that the distance a spring is stretched (or compressed) varies directly as the force on the spring. A force of 265 newtons stretches a spring 0.15 meter. (a) What force is required to stretch the spring 0.2 meter?

40. Math

15. If a 10-pound sack of potatoes costs \$6.55, how much would 1 pound cost? Round your answer to the nearest cent. A. \$1.65 B. \$6.55 C. \$.65 D. \$.66 C?

41. Science

Explain the following quote: ... it was several weeks before an emigrant from Earth could adapt to it. On the Moon the human body had to learn a whole set of reflexes. It had, for the first time, to distinguish between mass and weight. A man who weighed

42. Physics

A train is moving parallel and adjacent to a highway with a constant speed of 22 m/s. Ini- tially a car is 35 m behind the train, traveling in the same direction as the train at 36 m/s and accelerating at 4 m/s2. What is the speed of the car just as it

43. Science--3 questions? :c

15. The___hypothesis suggests that our solar system evolved from a huge rotating cloud of dust and gas. 16. Lines of____are used to measure distances east or west of the prime meridian in degrees. 17. The major difference between a topographic map and

44. Science

glass bottles in a recycling plant move along a conveyor belt up to a crushing machine at a constant speed of 0.5 what statement is true about the net force on the bottles as they move A. The force on the bottles are balanced B.The forces on the bottles

45. Chemistry

What amount of energy is required to melt a 27.4 g piece of ice at 0oC? The heat of fusion of ice = 333 Jg-1 Heat required to melt the ice 9.12e3 = J What amount of energy must be removed from 123 g of water to cool it from 71.6oC to 9.41oC? Specific heat

46. Int.science

Which of the following statements is true? A hypothesis is created at the end of an experiment. The dependent variable is changed by the experimenter. The best hypotheses are written as answers to a question. Observations are often used to form questions

47. Math

You drop a rock off a bridge. The rock’s height, h (in feet above the water), after t seconds is modeled by h = -16t2 + 541. What is the height of the rock after 2 seconds? A. –64 feet B. 605 feet C. 509 feet D. 477 feet I have no clue... please help

48. history

How did the 1839 Act of Union affect the Cherokee? A. It gave the Cherokee their own lands for the first time. B. It forced the Cherokee to merge with the Creek. C. It joined the Eastern and Western Cherokee into one tribe. D. It banned slavery in Cherokee

49. English

Has anyone here read the Gift of the Magi? I want some confirmation on a few parts.

50. math

f(x, y) = 3y cos x, 0 ¡Ü x ¡Ü 2¦Ð what is the saddle point for this?

51. physics

Three point charges are held at the corners of an equilateral triangle,if q=2 micro columb and length =3cm what is the resultant force on the +q charge

52. Trigonometry

The depth d in feet of the water in a bay at is given by d(t) = 3/2 sin (5πt/31) + 23 where t is time. Graph the depth of the water as a function of time. What is the maximum depth of the water to the nearest tenth of a foot? (Enter only the number.)

Please help me with the following: The volume of a cylinder is found using the formula V=πr^2h,where r is the radius of the base and h is the height. The volume of a rectangular prism of the same width (2r) and height h, as the cylinder, is found by

54. Math

Janice thinks that 20 hundredths is equivalent to 2 thousandths because 20 hundreds is equal to 2 thousands. Use words and a place value chart to correct Janice’s error.

55. Fraction

One egg is 1/12 of a dozen. How many eggs is 3/4 of a dozen?

56. statistics

heights of men on a baseball team have a bell shaped distribution with a mean of 172 cm and a distribution of 9cm. Using the empirical rule, what is the approximate percentage of the men between the following values? a. ___% of the men are between 145cm

57. physics

A car is traveling at 100 km/h, due northwest. The driver puts on the brakes and turns the corner. Four seconds later, he is heading east at 50 km/h. What is the average acceleration

58. chemistry

1. A sample weighing 1.30 mg was analyzed to determine the concentration of a certain compound (FW =292.16 g/mol) using UV/Visible spectrometry. First, the sample was dissolved in 5.00 mL volumetric flask. A 1.00 mL aliquot was drawn up, placed in a 10.0

A large department store has been attaching tags with barcodes to merchandise, and employees use barcode readers to scan merchandise at the cash register. However, the wireless barcode readers need new batteries often. Also, using this system for inventory

60. physics

The (non-conservative) force propelling a 1.90 x 103-kg car up a mountain road does 6.70 x 106 J of work on the car. The car starts from rest at sea level and has a speed of 20.0 m/s at an altitude of 1.80 x 102 m above sea level. Obtain the work done on

61. Math

Mr Kim mix cement and sand to make a mixture.He uses 2 pails of cement for every 5 pails of sand. (A) Find the ratio of the number of pails of cement to the number of pails of sand. (B) If he uses 24 pails of cement,how many pails of sand does he use? (C)

62. chemistry

in an experiment, 24g of magnesium metal reacts with 73g of hydrogen chloride solution to produce hydrogen gas and 95g of magnesium chloride. Write the word, skeletal and balance eqautions

63. Math

2. Jane is making a suit which requires 2 5/8 yards for the jacket and 1 3/4 yards for the skirt. What is the total amount of material she needs? A. 4 3/8 yards B. 3 2/3 yards C. 4 yards D. 3 1/2 yards A?

64. Math

Write the given sentence as an equation. Tim’s age in 7 years will be three times what it was 19 years ago. A. 3(t + 7) = t – 19 B. t + 19 = 3(t – 7) C. t + 7 = 3(t – 19) D. 3(t + 19) = t – 7 need help

65. chemistry

A student mixes 4 reagents together thinking that the solution will neutralize each other . The solutions are mixed together are 50 ml of 0.100 M .hydrochloric acid 100 ml of 0.200 M of nitric acid 500 ml of 0.0100 M calcium hydroxide and 200 ml of 0.100 M

66. Physics

An electric rod of 2000 watts rating boils a certain quantity if water in 10 minutes, the heat is generated for boiling this water is? answer is 12 X 10^5 Joules, but I cant solve it please solve it

67. Physics II

The force on the rectangular loop of wire in the magnetic field in the figure below can be used to measure field strength. The field is uniform, and the plane of the loop is perpendicular to the field. Justify the claim that the forces on the sides of the

68. Chemistry

Aluminum oxide is formed by reaction of excess oxygen with aluminum. 4 Al(s) + 3 O2(g) -> 2 Al2O3(s) Calculate the mass of aluminum required to form 18.2 kg of aluminum oxide if the reaction has a percent yield of 83.4%.

69. Math

Solve the equation. - 1/3m – 7 = 5 A. –4 B. –15 C. –36 D. 6 lost here, any help :)

70. physics

A pendulum consists of a small object hanging from the ceiling at the end of a string of negligible mass. The string has a length of 0.73 m. With the string hanging vertically, the object is given an initial velocity of 2.0 m/s parallel to the ground and

71. physics

A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 90 kg. The mass of the rock is 0.26 kg. Initially the wagon is rolling forward at a speed

72. Science help?

On the global grid, the prime meridian is at _____. 0 degrees latitude 90 degrees latitude 0 degrees longitude 90 degrees longitude

73. Geometry

The volume of a sphere is 3,000ð m3. What is the surface area of the sphere to the nearest square meter?

74. Social Studies

How did colonists feel about the Navigation Acts? A. Colonists resented the Navigation Acts because the acts limited their trade with nations other than England. B. Colonists generally like the Navigation Acts, because the acts gave them greater access to

75. writing,essay

I have to wirte an essay ,about 300 words on ''A people without the knowledge of their past history, origin and culture is like a tree without roots'' Marcus Gravey I have really no diea where to start, thank you for the help

76. algebra 1

Find the x and y intercept of this equation: 10x-70y=210 I keep getting the wrong answer. Can you show me how to set it up and work it out?

77. History Help!!

Which descriptions of the roles of the popes and patrons of the arts in restoring the city of Rome are accurate? Choose all the correct answers. A- organized teams to find ancient statues buried in Rome. B- commissioned artists to create stunning paintings

78. statistics

c. The arrival of large jobs at a computer centre forms a Poisson process with rate 2 per hour. The service time of such jobs are exponentially distributed with mean 20 minutes. Only 4 large jobs can be accommodated in the system at a time. i. Determine

79. Physics

route that takes it 12 km [E] of its starting position in 24 min. In another 24 min, the bus turns around and retraces its path to the terminal.

80. Chemistry

Many important metals occur as sulfide, arsenide, and antimonide minerals, especially in the Sudbury mineral complex. The first step in processing these ores involves “roasting” the ore in air to produce the metal or metal oxide, along with nonmetal

81. Physics 1

A disk rotates with constant angular acceleration. The initial angular speed of the disk is 2π rad/s. After the disk rotates through 17π radians, the angular speed is 18π rad/s. (a) What is the magnitude of the angular acceleration? answer in rad/s2 (b)

82. Math

10. Yolanda spends 8 2/3 hours per month playing soccer. Approximately how many hours does she play soccer in a year? A. 416 B. 104 C. 197 D. 28 I think it is B because there are 12 months in a year.So I took 8 2/3 and multiplied it by 12 and got 104 for

83. physics

A water-skier is being pulled by a tow rope attached to a boat. As the driver pushes the throttle forward, the skier accelerates. A 65.6-kg water-skier has an initial speed of 5.2 m/s. Later, the speed increases to 11.9 m/s. Determine the work done by the

84. physics

Batman (mass = 89.1 kg) jumps straight down from a bridge into a boat (mass = 452 kg) in which a criminal is fleeing. The velocity of the boat is initially +12.9 m/s. What is the velocity of the boat after Batman lands in it?

85. Math

A quart is one fourth of a gallon. Dan drank half a quart of milk. What fraction of a gallon did Dan drink?

86. Math

Find lim h->0 [f(2+h)-f(2)]/h where f(x)=|x-5|-7

87. Algebra

How to Name Like terms? 5m+4+3m+6p do I just name 5m and 3m or is it more complicated than I think?

88. science

The chemical formula for copper sulfate pentahydrate is CuS4°H2O. Based on your observations, what do you think happens to this formula when the crystals are heated? In assuming that the answer has something to do with the h2o because when it's heated it

89. Distributive Property Algebra

I have two questions I don't understand and I need you to explain the steps of each problem to me? Thanks. Use the distributive property 8(6-2) Use the distributive property to multiply 7(c+4) I will be putting this in my notes.

90. Georgia State History

In 3–5 sentences, explain the impacts that European contact and settlement had on the Native Americans.

91. algebra

a squirrel can run at a speed of 20 miles per hour. How many feet per second is this?

92. math

Suppose that a crayon weighs the same as a marker. You have a box of crayons, 4 extra crayons, and 20 markers. Let b be the number of crayons in the box. A scale balances with all the crayons on one side and all the markers on the other. You remove markers

93. Chemistry

What is the final temperature, in oC, after a 27.0 g piece of ice, at 0oC, is placed in a styrofoam cup with 120 g of water initially at 70.5oC. Assume there is no transfer of heat to or from the surroundings. The specific heat of water = 4.184 JK-1g-1 The

94. Physics

A= 2i + 3j - k, B= 4i + 2j - 2k, Find a vector x parallel to A but has magnitude of B ? Answer is √12/7 (2i+3j) - K solve it , i have mcat admission test please solve it

95. physics intro

A truck with a mass of 14,0 00 kg is pushed with a force of 9200 N. If the frictional force is 2150 N what is the truck’s acceleration?

96. chemistry

530 mL solution 10% HCl has been spilt onto the bench. It cannot be diluted or washed away. How much of the granular NaOH from the container seen in a must be used to neutralise the acid? [Using NaOH: MM = 40 g/mol] 1. I have NaOH + HCl --> NaCl + H2O. 10%

97. physics

A 17-kg sled is being pulled along the horizontal snow-covered ground by a horizontal force of 20 N. Starting from rest, the sled attains a speed of 2.2 m/s in 8.4 m. Find the coefficient of kinetic friction between the runners of the sled and the snow.

98. Int. science

The creation of graphs usually occurs during _____. data analysis data collection observation questioning I think it might be B

99. Algebra ll

X^2 - 25/2 AND 37/K^2-K-30 I really need help with these two problems.? •Explain in your own words what the meaning of domain is. Also, explain why a denominator cannot be zero. •Find the domain for each of your two rational expressions. •Write the

100. Math 3 quick questions

Factor: A.). 4(3x+1)^2 -5(3x+1) +1 B.) 5(2-3x)^2 -28(2-3x)+15 C.) 2(3a-4)^2 - (3a-4)(a+2)-6(a+2)^2

101. Math

Find the equation of the tangent line to the graph of y=3cot^4x at x=pi/4 3cot^4(pi/4)=3(1)=3

102. Chemistry 30

Complete the following reactions by moving only one proton at a time. Identify the acid (A) and the base (B) on the left-hand side of the equation, and the conjugate acid (CA) and the conjugate base (CB) on the right-hand side of the equation, according to

103. Financial Mathematics

The Z Corporation needs \$180,000 in 60 months. If they deposit \$2,000 per month for the first 20 months, \$2,500 for the next 20 months, and \$2,000 + R for the last 20 months, what is R if they can invest at 7%(12)?

104. Science

When a nonzero net force acts on an object the force A.changes the motion of the object B.Must be greater than the reaction force C.Does not change the motion of the object D.is equal to the weight of the object

105. physics

A car accelerates uniformly from rest to 18.4 m/s in 4.36 s along a level stretch of road. Ignoring friction, determine the average power required to accelerate the car if (a) the weight of the car is 6.11 x 103 N, and (b) the weight of the car is 1.01 x

106. Science

1.)When evaluation was first processed which of the following was used as evidence to suport the idea (1 point) a.)observations of nature**** b.)laboratory experiments c.)extensive fossil collections b.)genetic sequence 2.)a farmer sprays insecticide on

107. Social Studies

Who exemplified the Enlightenment? A. George Whitefield B. George Washington C. Jonathan Edwards D. Benjamin Franklin*** Am I right on D being the answer? Thanks

108. Sociology

Societies norms, values and beliefs are enforced through internalization and sanctions (Points : 2) true or false An example of a positive informal sanction is when a parent gives a student praise for doing well on a test. (Points : 2) true or false Emile

109. physics

(a) What is the direction of the force on a wire carrying a current due east in a location where the Earth’s field is due north? Both are parallel to the ground. Answer: Direction of force is Vertically up from ground (b) Calculate the force per meter if

110. English

What are some major obstacles, failures and triumphs in Jay Gatsby's life? What is the development of career or interests of this character in the book? I can't remember many points for the first question and for the second question I don't really

111. Social Studies

The most important motivation for the English government to support the exploration and settlement of land in North America was... a. the desire to spread Christianity b. the need to separate from the Catholic church c. the need to protect England from

112. Social Studies (SS)

Sorry I accidentally put math but can you please Describe George Washington's expeditions into French territory.

If you are given a true equation and you add the same number to each side, the resulting equation is also a true equation. If you are given a false equation and you add the same number to each side, will the resulting equation be a true equation or a false

114. history

Hello.I need some advice with my history homework...Change and continuity in Britain before 1066....Thank you for yours help.

115. statistics

Analyze data to determine whether or not you think there is a relationship between height and ability to lift weights (at least as measured by the bench press). 1- Compute a linear regression line to fit this data, also2- compute the correlation

116. World civ.

Peat is mostly oxygen carbon nitrogen

117. chemistry

luminum oxide is an important starting material for making cryolite, Na3AlF6 (a compound used to give fireworks their yellow colour). First the aluminum oxide is synthesized from aluminum and then reacted with sodium hydroxide and hydrogen fluoride gas. If

118. Math

According to the U.S. Census Bureau's most recent data on the marital status of the 242 million Americans aged 15 years and older, 124.2 million are currently married and 74.5 million have never been married. If one person from these 242 million persons is

119. physics

A soccer ball is kicked from the ground with an initial speed of 19.4 m/s at an upward angle of 49.8˚. A player 48.5 m away in the direction of the kick starts running to meet the ball at that instant. What must be his average speed if he is to meet the

120. chemistry, biotechnology

The question is: "The molar extinction coefficient of pure antibody is 1.4 absorbance units per milligram antibody @280nm. You have a concentrated antibody solution, so you make a 5-fold dilution and measure @280, getting an absorbance of 0.845. What is

121. alika

A golf club strikes a 0.040-kg golf ball in order to launch it from the tee. For simplicity, assume that the average net force applied to the ball acts parallel to the ball’s motion, has a magnitude of 7950 N, and is in contact with the ball for a

122. French

How to say pay attention, everyone in French?

123. Trigonometry

What are the phase shift and the vertical shift for the function f(x) = cos 4(x+5) + 3? And what direction is each shift going in (up or down)?

124. Chemistry

What is the number of double or triple bonds in the formula C3H8? What is the number of lone pairs Around each atom? And what is the number of single covalent bonds? I also need help with the formula C3H6O with the same questions! For C3H8 I got 10 single

125. Plane and Spherical Trigonometry

A man walks 20 meters from point A to point B, Then he turns 80 degrees and walks 35 meters towards point C. How long is the distance AC? Draw the triangle

126. Probability

A box contains 10 balls. Three of them are white, five are red, and two are black. Calculate the following probabilities: a) The first ball extracted is red. b) The first ball extracted is red or white. c) The second ball extracted is red given that the

127. physics

even if drag force i.e air resistance is greater in magnitude as compared to other force ,there will be no motion in the direction of drag force, right?motion will be still in direction of that 'other force 'but as it is less than drag force there will be

128. math

Find the actual and approximate number days: december 8, 1972 to june 25,1980

129. Biology

What is the product of the oxidation of methanol? I'm not sure if it's formaldehyde? And would the product have water for an oxidizatiation

130. physics

I am struggling with this. A wombat of mass 22.0 kg starting at rest slides 13.0 m down a tree at a speed of 5.80 m/s just before reaching the bottom. (a) What is the change in the gravitational potential energy of the wombat during the trip? (b) What is

131. Simplify this Expression?

Simplify the following Expression z-2z+4z+6 Can you please explain to me step by step? I will be adding this to my notes. Thanks.

132. Physics II

A positively charged particle is moving with a velocity v in a large homogeneous magnetic field. (a) If the field is 4 mT, the mass of the particle is 33·10−9 kg, its initial speed 8.1 m/s, and its charge 6 μC, what is the magnitude of its

133. algrebra

a purse contain \$6.00 in quarters and dimes. there are 17 more quarters than dimes. find the number of quarters and dimes

134. Math

Lisa can run a mile in 8 minutes.Which is the most resonable time for her to run a 10-km race?

135. History

Need help on this question..I think it is "a" but not sure. Spanish Friars most likely settled in the Georgia barrier island to: a. convert Native Americans to Christianity b. find gold and silver c. find free farm land d. establish a colony for freedom of

136. health

There is no treatment that can cure ________. A. Herpes B. Bacterial Vaginosis C. Chlaymdia D. Syphilis

137. math

explain what do you need to do to extend number pattern?

138. I have brain freeze - HIS204

I have total brain freeze on this queue. I remember the Reagan time but not well. Any help would be greatly appreciated. What cultural issues caused the most friction during the Age of Reagan?

139. english

what is the symbolism and theme in the story Royally Crushed by Niki Burnham? I need it for an essay and I'm having trouble with it.

140. physics

On a spacecraft, two engines are turned on for 525 s at a moment when the velocity of the craft has x and y components of v0x = 4780 m/s and v0y = 8850 m/s. While the engines are firing, the craft undergoes a displacement that has components of x = 3.54 x

explain what do you need to do to extend number pattern?

142. chemistry

Light travels at the speed of3.0x10^10 cm/sec. what is the speed of light in feet per hour? I'm not sure on how to start it.

A large department store has been attaching tags with barcodes to merchandise, and employees use barcode readers to scan merchandise at the cash register. However, the wireless barcode readers need new batteries often. Also, using this system for inventory

144. Math

If you divide a certain number by 17, the quotient is 47 and the remainder is 2. What is the number? What is the sum if all the numbers less than 496 that divides evenly into 496? The ratio of girls to boys in a class is 3:2m. If there are 35 students in

145. chemistry

For the adiabetic expansion of an ideal gas a) does the gas do work? B) doesd the internal energy of the gas increase, decrease or remain constant? C) what happens to the temperature? Please check my answers A) yes the gas does work because it is expanding

146. Physics wavelength question, help please .

The energy of an X-RAY quantum of wavelength 1.0 X 10^-10 m is. its answer is 1.99 X 10^ -15, but i don't know how to solve it , thanks help please

147. Math

Please check my answers I think they are right if not please tell me where I went wrong. Thanks The annual net income of general electric for the period 2007-2011 could be approximated by P(t) = 3t^2- 24t +59 billion dollars (2

148. physics

A box has a mass of 0.345 kg. It is on a very smooth (frictionless) horizontal surface and is acted upon by a force of 3.76 N at an angle of θ = 57.1° with the horizontal. The magnitude of the acceleration of the box is m/s2?

149. English - Parts of Speech

I want the definition of all Parts of Speech(not too short, not too long) with five examples. Thanks in advance.

150. chemistry

1) what potential impurities were removed during recrystallzation? 2) two solids with different identities are frequently mixed together & do not melt, why do you suppose that the solids actually melted?

151. physics

Object A is moving due east, while object B is moving due north. They collide and stick together in a completely inelastic collision. Momentum is conserved. Object A has a mass of mA = 16.7 kg and an initial velocity of nu Overscript bar EndScripts

152. Economics

State of the good is pure private, pure punlic, or mixed. 1. County zoo 2. UPS Delivery 3. Air conditioning 4. Flood control projects 5. Elementary education 6. Pollution 7. Math tutor I think they are: 1. Mixed 2. Mixed 3. Mixed 4. How is a project a

153. Science

1. The process of nitrogen fixation uses oxygen to produce carbon dioxide- false? 2. While a pyramid of numbers or biomass can be inverted, a pyramid of energy cannot- false? are my answers correct?

When hired by Imp, Inc., Jake immediately began his job as an inventory clerk. He was learning by doing in an approach to employee training called A. apprenticing. B. on-the-job training. C. employee orientation D. vestibule training.

155. math

Solve the equation. -6p - 21 = 3p - 12 A. 1 B. 3 C. –3 D. –1 im sure its D but I wanna make sure am I right?

156. Math

Solve the equation. 6 = 2(x + 8) - 5x A. 2/3 B. 3 1/3 C. - 2/3 D. -3 1/3 I don't know :/

157. math

I am a decimal with a value in the thousands place.In my tenths place,you will find a digit one less than the digit in my Hundreds place and three less than my other digit.My last digit is 3.What decimal am I?

158. ENGLISH

english is not my first language ,plz help i m writing an essay .. In order to prevent the risk factor of social media, parents should involve in children social media and other online issues. .Parent should win the confidence of their children and

159. n2 maths

A lead cylinder with a diameter of 25 cm and a heighth of of 40 cm is melted. the lead is used to cast lead spheres with a radius of 3 cm each. calculate how many spheres can be casted from the available lead.

160. physics

direction of drag force i.e air resistance .is it always upward?or like friction force it just concern with opposing motion can be in any direction? in a motion it can be in any direction opposite to direction of motion?

161. HELP! Algebra. DONT UNDERSTAND

Factor each of the following expressions completely and then simplify, if possible: a: ax + 2x b: ax - 2x c: 3x - 4x + 7x d: 3x^2 + xy - x e: (a + b)(c + 1) - (a + b) f: x^2 - 9y^2 g: (x^2 - y^2) + x + y

162. Sociology

Norms must be followed for a society to function smoothly. (Points : 2) true or false Emile Durkheim was a sociologist influenced by Charles Darwin (Points : 2) true or false

163. geometry

Two rectangular panels are used to construct the four office cubicle. They are designed to pivot at the center Line NS. If the two panels are pivoted to increase the size of one office what happens to the adjacent offices? The opposite office? In order for

164. Chemistry

1)what potential impurities were removed during solventless aldol recrystallzation? 2) two solids with different identities are frequently mixed together & do not melt, why do you suppose that the solids actually melted? (why do you assume that it has been

165. AC DC Circuit fundamentals

If a 10k ohm and a 5k ohm resister are connected in series across a 12 volt source whats the voltage across the 10k ohm resistor and 5 ohm resistor?

166. algebra

parts x4= strap

167. Eletrostatic

Three charges q, 2q, and 3q are arragend to form a equileteral triangle. A charge Q is placed at the center of the triagle. What´s the Net Force about Q. Give the modulus and the direcction of the force.

168. maths

A student says that the perimeter of a rectangle with length 2x-1inches and width 3x inches can be written as 10x-1inches because 2(2x-1)+2(3x)= 10x-1. Explain why the statement is incorrect

169. Health

How do I distinguish a symptom of schizophrenia from a warning sign?

170. Biology

What are some of the reasons why everyone does not have the same pulse rate at rest?

171. health

The ________the concentration of HIV in semen or genital fluids, the more likely it is that HIV will be transmitted to a sex partner. A. Lower B. Weaker C. Higher D. All of the above

172. Rodriguez

use implicit differentiation to find the slope of the tangent line to the curve of x^2/3+y^2/3=4 at the point (-1,3sqrt3)

173. Math (Implicit Differention)

use implicit differentiation to find the slope of the tangent line to the curve of x^2/3+y^2/3=4 at the point (-1,3sqrt3)

174. physics

An object is being thrown upward at 50m How long does it take the object to reach maximum height? What is the maximum height of the object? How much time does it take for the audit to return to its original position? What is the velocity of the object when

175. Math

1. t + 27 = 21 t = –6 t = 47 t = 6 t = –47 2. 24 = m – 32 m = –8 m = 56 m = 768 m = –56 3. Tamara has eaten 1,400 calories for breakfast and lunch. She has 800 more calories, c, that she can eat for dinner. Write and solve an equation to find

176. statistics

binomial probabilities one in four adults is currently on a diet. Find the probability that the number who say they are currently on a dies is (a)exactly three, (b)at least three, and (c) more than three

177. Math--4 practice questions?

1. t + 27 = 21 t = –6 t = 47 t = 6 t = –47 2. 24 = m – 32 m = –8 m = 56 m = 768 m = –56 3. Tamara has eaten 1,400 calories for breakfast and lunch. She has 800 more calories, c, that she can eat for dinner. Write and solve an equation to find

178. Physics

A motor of a certain elevator gives it a constant upward acceleration of 0.767 m/s2, the elevator starts from rest, accelerates for 2s, then continues with a constant speed. a) What is his final speed after 2s? b) Calculate speed after 1 ,and 3 s.? c) How

179. Vectors problem help?

If A = 3i + 6j -2k, then unit vector parallel to A will be answer is 3/7i + 6/7j - 2/7k solve it please, because i don't know how he got that answe thanks

180. Biology

which heart beat measurement is most indicative of your general health i think it is your resting heart beat, but im not sure why>

181. math

A 70% acid solution is to be mixed with a 40% solution. How many gallons of each solutions are needed?

182. Math

between were erika is standing to the vertical distance from the kite is 75 meters. how high is the kite in meters a.)125 b.)100 c.)25 d.)15 My answer is c am i correct ?

183. Physics

Having trouble on the question below. Would you do need to convert the km to meters and then multiply (4700*9.8*165500)? The first woman in space, cosmonaut Valentina Tereshkova, flew in 1963. She orbited the earth 48 times during her 70 hour 50 minute

184. math

If a recipe calls for 2 2\4 of something but I only have 1\4 measuring cups. How many 1\4 cups do I need to use?

185. Math

I have the following data set of 12 numbers that make up landmarks. 5,,7,7,7,8,9,10,14,15,15,16,16,17,18. How do I display them on a bar graph?

186. Math

I don't understand how this statement is true: If AB = BC then B is the midpoint of AC

187. Chemistry 104

A student has 10.0mL of phosphate solution that contains 1.0M PO4{3-}.The Student reacts this with excess ammonium & magnesium under basic conditions to produce 2.2034g of struvite. Calculate the % yield.

188. algebra

seven more than twice a certain number?

189. Science

Calculate What is the net force on the box if it's 15N going to the left and 10N going to the right? HOw will the unbalanced forces change the direction of the box

190. chemistry

530 mL solution 10% HCl has been spilt onto the bench. It cannot be diluted or washed away. How much of the granular NaOH from the container seen in a must be used to neutralise the acid? [Using NaOH: MM = 40 g/mol]

191. Physics

Forces of 9.5 N and 5.12 N act at right angles on a reddish-green block of mass 3.19 kg. How much acceleration occurs?

192. physics

Forces of 8.85 N and 2.21 N act at right angles on a stack. What is the mass of the stack if it accelerates at a rate of 4.4 m/s^2?

193. physics

What would be the resultant vector with an angle of 30° with the +x axis and has a y component of 1.2 Newtons?

194. physics

A lumberjack (mass = 95.7 kg) is standing at rest on one end of a floating log (mass = 218 kg) that is also at rest. The lumberjack runs to the other end of the log, attaining a velocity of +2.54 m/s relative to the shore, and then hops onto an identical

195. Science

A 2kg ball at rest experiences two forces The force on the left is 13.2 N and the force on the right is 15.4 N Calculate the net force in newtons on the ball as it moves to the left. Subtract 15.4 and 13.2?

196. Algebra 2

Please work this problem. A= 1/2 h(c+d) h=

197. math

joyce and her father are 48 and 20 years younger than her grandfather.if the product of ages of joyce and her father is 480,find the equation which represents their age

199. math

Select the expression that represents the statement "27 more than a number

200. physics

Drow a velocity time graph graph for the ball starting 1.0 s before the collision to 1.0s after the collision

201. Science

Find the mean time for each ramp length Mean 3.6s Find the ball's acceleration for each mean time using the equation below where D is distance or ramp length and T is time Acceleration=2D/T^2 1.5m(Distance) Use 3.6

202. math n2

AB is a vertical cliff. C is a point 380m from the cliff. the angle of elevation to the top of the cliff is 58 degrees. calculate the height of the cliff

203. Math

if jerry bought 6 shoes for 85 dollars, how much would fred have to pay for 17 pairs at the same rate?

204. Intro to Physical Science

A diver (mass 100kg.)drops from a height of 12 meters and reaches the pool below at ground level. 3550 joules of heat energy are generated due to friction. With what speed will the diver hit the water?

205. Calculus

True or false: a) if f(x) is continuous at a, then the limit of f(x) as x approaches a exists b) if the limit of f(x) as x approaches a exists, then f(x) is continuous at a My answer: a) false b) true

206. Math

1/6 * 5/8 in simplest form.

207. math

Find the actual and approximate number days: september 8, 2008 to december 25, 2008

208. Math

Solve each problem. Blank x 10=2 tens

209. Math

7/9*3 in simplest form. How do you multiply with a whole number?

210. Trigonomrtry

I had asked help for a question and Steve gave me this answer on how to set up equation 20-x/6.11=tan28 degrees The answer is approx 16.75 ft. I still don't know how to do this! When I do it I get different answer. Could you please break this down step by

211. Physics

A wire carrying a 20.0–A current passes between the poles of a strong magnet that is perpendicular to its field and experiences a 2.47–N force on the 3.10 cm of wire in the field. What is the average field strength?

212. Physics Constant Force question help.

A constant force acting on body mass 5 kg changes its speed from 2 m/s to 7 m/s , the direction of motion remains unchanged, find FORCE. answer is 2.5, but help me solve it, thanks

213. government

what is the function of article 1 of the constitution

214. Biology

Why is protein synthesis important?

215. math

Find eight team members: write the integer represented

216. science

A hypothesis _____. must be tested is supported by large amounts of data is accepted by the scientific community must be proven true for an experiment to be worthwhile

217. Algebra

(3x^2-4x^3+7)+(-5x+11-7x^3-4x^2)

218. Math

the scale drawing of a billboard is 21ft wide and 10.5ft high, what is its scale?

219. Math

(11/8)(-1/3) = my answer is 11/24

220. World civ.

Which type of coal is only found in Pennsylvania? anthracite bituminous peat

221. physics

Explain why the line touches the x-axis at approximately 30oC and 45oC.

222. Inverse variation

-6(8k+4) = 21 + 3k

223. Math

How do you divide FFE/AC? (Note: These are hexidecimals)

224. Explanation

Will someone explain to me how and when to cite for a biographical essay?

225. Biology

What are some of the reasons why everyone does not have the same pulse rate at rest? i think it would be age, gender, weight, but im not sure why

226. Algebra 1

Jenny simplified the expression 7x + 5y + 4(x – y) – 6 and listed the Number Properties used: c) Redo the problem correctly. Justify each step using the correct Number Property. (2 points) Jenny’s Work Number Property Used 7x + 5y + 4(x – y) – 6

227. Math Question

Suppose that y varies inversely as x. If y = 63 when x = 3, the constant of variation is 189. True Or False?

228. geometry

AB=9a BC=12a AC=42 I don't understand how to work this out if I don't have say 3y+1.

229. math

Solve the equation. x - 9 = -6x + 5 A. 14 B. 7 C. 2 D. 21 please help :(

230. Montclair

20 + 5 * (? + 6) - 12 / 2 = 64

231. Math

hi, I need to know what interval mean I couldn't find it

232. Calc

True or false: a) if f(x) is continuous at a, then the limit of f(x) as x approaches a exists b) if the limit of f(x) as x approaches a exists, then f(x) is continuous at a My answer: a) false b) true

233. Technology in Day Care

Which of the following is not a reason why an early childhood teacher would choose to use a virtual field trip over live, hands-on experience? A. The actual trip would be too expensive. B. The location is too far away. C. It wouldn't be safe to take

234. Math

Solve the equation. x/5 + 9 = 4 A. 65 B. –25 C. 5 D. 20 I think its B

235. chem

Which of the following ions contains lone pair of electrons at the central atom? A) SO4 2- B) NO3 - C) IO3 - (Is there any ways without drawing the diagrams and I could still able to figure out the answer???) Thx very much

236. Calculus

Find all values of x if any where the tangent line to the graph of the given equation is horizontal? y= x - sqrt (x) I am very confused would I work it like this? y = x - x^-1/2 then set x = 0? Please explain. thank you!