# Questions Asked onOctober 17, 2011

1. ## Calc

If a rock is thrown upward on the planet Mars with a velocity of 17 m/s, its height (in meters) after t seconds is given by H = 17t − 1.86t^2. (a) Find the velocity of the rock after one second. (b) Find the velocity of the rock when t = a. (c) When will

2. ## chem

When the valve between the 2.00-L bulb, in which the gas pressure is 2.00 atm, and the 3.00-L bulb, in which the gas pressure is 4.50 atm, is opened, what will be the final pressure in the two bulbs? Assume the temperature remains constan

3. ## Chemistry

Assuming equal concentrations , rank these solutions by pH. RbOH(aq), NH3(aq), HF(aq) HBr(aq), Ca(OH)2(aq). I know the most acidic solution has the lowest pH and the most basic solution has the highest pH. But how am i supposed to know the pH if i don't

4. ## university physics

It is proposed that future space stations create an artificial gravity by rotating. Suppose a space station in constructed as a 1170.0 m diameter cylinder that rotates about its axis. The inside surface is the deck of the space station. What rotation

5. ## physics

A hockey puck slides across the ice at a con- stant speed. Which of the following is true? 1. The puck is moving and thus not in equi- librium. 2. The puck can be considered neither at rest nor in equilibrium. 3. It is in equilibrium. 4. None of these 5.

6. ## physics

An electron of mass 9.11 10-31 kg has an initial speed of 3.00 105 m/s. It travels in a straight line, and its speed increases to 8.00 105 m/s in a distance of 10.0 cm. (a) Assuming its acceleration is constant, determine the force exerted on the electron.

7. ## Physics

A toy chest and its contents have a combined weight of W = 180 N. The coefficient of static friction between toy chest and floor μs is 0.440. The child in Fig. 6-35 attempts to move the chest across the floor by pulling on an attached rope. (a) If θ is

8. ## chemistry

In Chemistry: what is ph during the titration of 20.00ml of 0.1000m triethylamine (ch3ch2)3n (kb=5.2x 10-4) with 0.1000m HCL solution after the additions of titrant : a) 0ml (b) 10.00ml (c) 19.00ml (d)15.00ml (e) 20.00ml (f) 25.00ml

9. ## chemistry

CH3OH(g) ----> CO(g) + 2H2 (g) (delta H =+90.7k) A) is heat absorbed or released in the course of this reaction? b) calculate the amount of heat transferred when 45.0g of CH3OH(g)is decomposed by this reaction at constant pressure. c) for a given sample of

10. ## History

how did the atlantic slave trade reflect the times during which it existed?

11. ## Physics

You buy a plastic dart gun, and being a clever physics student you decide to do a quick calculation to find its maximum horizontal range. You shoot the gun straight up, and it takes 3.8 s for the dart to land back at the barrel. What is the maximum

12. ## chemistry

What pb2+ concentration should be maintained in PbNO3 to produce a solubility of 1.7×10−4 PbI2/L when PbI2 is added? I found the ksp of PbI2 to be 7.1*10(-9), divided the ksp by the solubility, and took the square root, resulting in 6.5*10(-3). my

13. ## Algebra

Which of the following statements from Euclidean geometry is also true of spherical geometry? A) A line has infinite length. B) Two intersecting lines divide the plane into four regions. C) Two perpendicular lines create four right angles. D)The

14. ## Physics

A rolling ball has an initial velocity of 1.6 m/s if the ball has a constant acceleration of .33 what is the velocity after 3.6 and the how far did the ball travel

15. ## physics

the time a male bungee jumps is freely falling is 1.5 seconds. what is the velocity of the jumper at the end

16. ## physics

As shown in the figure, a block of mass M1 = 0.470 kg is initially at rest on a slab of mass M2 = 0.850 kg, and the slab is initially at rest on a level table. A string of negligible mass is connected to the slab, runs over a frictionless pulley on the

17. ## CHEMISTRY HELP

1) The specific heat of solid copper is 0.385 J/g(C). What thermal energy change occurs when the temperature of a 34.10 g sample of copper is cooled from 35.7 degrees Celsius to 13.9 degrees Celsius? Answer: -286.3 J This amount of heat is used to melt

18. ## Physics

A 9.60 g coin is placed 10.7 cm from the center of a turntable. The coin has a coefficient of static friction of 0.80 and a coefficient of kinetic friction of 0.60 with the turntable. The turntable's angular velocity slowly speeds up until the coin starts

19. ## science

Which of the following substances are homogeneous and which are heterogeneous? Blood, carbon dioxide gas, solid carbon dioxide, rock, steak, iron, rust, concrete, air, oxygen, salt, milk.

20. ## Physics

A boy starts at rest and slides down a frictionless slide as in the figure below. The bottom of the track is a height h above the ground. The boy then leaves the track horizontally, striking the ground a distance d as shown. Using energy methods, determine

21. ## English Check

1. (Points: 2) The lawyer had been involved in several (elicit, illicit) activities. b. illicit 2. (Points: 2) When people (emigrate, immigrate), they move into a country. b. immigrate 3. (Points: 2) Several (incidence, incidents) caused the bookkeeper to

22. ## Fibonacci Numbers

I need to find f24. I know F23=28657 and f25=75025. I have figured out that F24 is 46368 using F(n)=F(n-1)+F(n-2). My problme is asking me for two values of n for which Fn=n. I do not understand what it is asking.

23. ## cultural anthropology

Which of the following would anthropologists not consider a caste? A) the Eta of Japan B) Blacks in the American South in segregation days C) Anthropologists would classify all of these groups as castes. D) the Camar (leather-workers) of India

24. ## Math( help please ! )

The profit p(x) of a cosmetics company , in thousands of dollars,is given by p(x)=-5x^2+400x-2550, where x is the amount spent on advertising , in thousands of dollars a) determine the max profit the company can make b)Determine the amount spent on

25. ## Physics

In figure, the mass m2 = 10 kg slides on a frictionless shelf. The coefficients of static and kinetic friction between m2 and m1 = 5 kg are µs = 0.6 and µk = 0.4. (a) What is the maximum acceleration of m1? (b) What is the maximum value of m3 if m1 moves

26. ## Chemistry

What volume (in ml) of carbon dioxide will form if 19.3 ml of O2 are reacted acccording to the following balanced equation: 2CO(g) + O2(g) --> 2CO2(g) Assume an excess of CO and that all are at the same temperature and pressure.

27. ## English

Did you prefer the book "The Outsiders" or the film, or parts of both?Give reasons with evidence from the book and the film. Please consider and discuss different aspects such as: -characters -themes -portrayal of gang culture -relationships, and anything

28. ## math

to compare3/8 and 9/16 what equivalent fraction could you find?

29. ## MATH

0.001=10^___ 1 billion=10^___ 1/10 = 10^___ 13^5 in standard notation 10^9 in standard notation please hellp me answer tese questions

30. ## physics

A 450 g block is at rest on a horizontal surface. The coefficient of static friction between the block and the surface is 0.670, and the coefficient of kinetic friction is 0.380. A force of magnitude P pushes the block forward and downward as shown in the

31. ## Physics

In loading a fish delivery truck, a person pushes a block of ice up a 200 incline at constant speed. The push is 150N in magnitude and parallel to the incline. The block has a mass of 35.0 kg. What is the force of kinetic friction on the block of ice?

32. ## U.S History

who won the battles of Lexington and Concord? were the armies evenly matched? explain.

33. ## Chemistry

An unknown compound contains carbon, hydrogen, and oxygen. When burned, a 2.000 gram sample of this compound releases 3.451 g of carbon dioxide and 1.059 grams of water. What is the empirical formula of this compound? Thank you very much.

34. ## chemistry

How many Moles of H are in 2.20 moles of H3PO4? and how do you figure that out? Thanks!

35. ## statistics

A telephone company's goal is to have no more than four monthly line failures on any 50 miles of line. The company currently experiences an average of 4 monthly line failures per 25 miles of line. Let x denote the number of monthly line failures per 50

36. ## chemistry

Calculate the number of grams of oxygen required to convert 58.0g of glucose to CO2 and H2O?

37. ## german

What does this mean: Sie sind sehr hubsch. ??? :)

39. ## social studies

What were some problems in jamestown

40. ## Statistics

The following data lists the average monthly snowfall for January in 15 cities around the US: 29 26 6 46 17 34 15 45 19 43 37 6 9 33 37 Find the mean, variance, and standard deviation.

41. ## Chemistry

An unknown molybdate (MoO4^-2) solution (50.00ml) was passed through a column containing Zn(s) to convert molybdate into Mo^3+. One mole of MoO4^-2 gives one mole of Mo^3+. The resulting sample required 22.11 ml of 0.01234 M KMnO4 to reach a purple end

42. ## Chemistry

Which of the following gases will occupy the smallest volume at 300 K and 760 torr and why? 80 g diatomic oxygen 80 g methane 80 g hydrogen fluoride

43. ## geography

Name the four oceans in order of size, largest to smallest. My answer- Pacific Ocean, Atlantic Ocean, Indian Ocean, and Arctic Ocean. If I am wrong will you please give me a web site I can go to for the answer. I do not have a book at home to refer to for

44. ## Stats

For a particular sample of 63 scores on a psychology exam, the following results were obtained. First quartile = 57 Third quartile = 87 Standard deviation = 9 Range = 51 Mean = 72 Median = 72 Mode = 98 Midrange = 57 Answer each of the following: I. What

45. ## Statistics

A sample of purchases at the local convenience store has resulted in the following sample data, where x = the number of items purchased per customer and f = the number of customers. x 1 2 3 4 5 f 5 15 8 8 7 •What does the 15 stand for in the above table?

46. ## U.S History

what was the most important decision made by the continental congress? why?

47. ## Science

Calculate the mass percent of sand, sodium chloride and copper (II) sulfate in a sample which yields the following data: mass of sample = 1.088g, mass of sand = 0.2255g, mass of copper (II) oxide = 0.1994g (assume 100% yield for each of the copper (II)

48. ## University Chemistry (first year)

I'm working on a first year chemistry lab where we synthesized alum from alunimini foil and I'm doing the report and one of the questions is as follows: Based on your findings, what volume of water can be cleared of suspended solids by one beverage can

49. ## English

The Lottery takes place on a beautiful summer day in a small town. Although the location of the town, is never given, it appears to be in a rural community. The story begin as a regural summer day, but has a surising ending. In the short story "The

50. ## English

Please help me errors in my paper so I can correct them. The Lottery takes place on a beautiful summer day in a small town. Although the location of the town, is never given, it appears to be in a rural community. The story begin as a regural summer day,

51. ## Science

If earths mass were reduced by 1/2 , but its radious satyed the same , how much would your weight change ? Would it also be reduced by half ?

52. ## Ms. Sue

Dear Ms. Sue, I want to thank you. You have been a great help to many people. You offer great advice. You have touched the lives of many people. You are truly a magnificent person. I honestly hope you live the rest of your life in happiness and bliss. A

53. ## Physical Science

A chemist is investigating an unknown gas. She observes that it combines with oxygen. It takes two liters of oxygen to fully react with one liter of the unknown gas, and that the resulting volume of gas is also two liters. What does she conclude? A.) The

54. ## Socials (URGENT)

Why did the canadian government feel the need to control the economy, transportation and trade after war was declared in 1914? Was this a genuine need? Explain. Hi, I need some help on the second half of the question. Was it a genuine need? I can't find

55. ## physics

A block is given an initial velocity of 2.00 m/s up a frictionless 23.0° incline. How far up the incline does the block slide before coming (momentarily) to rest?

56. ## Interest Rate

Is there an easier way to comprend how inflation, expectations, and risk combine to determine interest rates? I understand how risk plays a factor but I am unclear on expectations plays a role.

57. ## physics

what are the units of measures used to measure heat

58. ## science

How do you calculate how long will it take an object dropped from a window to fall a distance of 78.4 meters?

59. ## Chemistry

You have 250 mL of a 0.80 M solution of silver nitrate AgNO3 (169.87 g/mol) dissolved in water. How many grams of AgNO3 does the solution contain?

60. ## science

you and a child are on skates and you give each other a push. if the mass of the child is half your mass, who has the greater acceleration? by what factor? i know it is the child but im not sure about the factor. im pretty sure the answer has something to

61. ## french

I need help unscrambling these french words: srteelt, sbrtmie and eiuocrrl. thank you for helping :)

62. ## Quote

can anyone please explain what this quote means? thank you "Man is nothing else but what he makes of himself.” ~Jean-Paul Sartre

63. ## MATH Middle School

The area of two rectangles is 360 square centimeters. The length of the second rectangle is 12 cm greater than the first while its width is 5 cm less than the first. Find the difference of the perimeters of the two rectangles if the lengths and widths are

64. ## History

what was the goal of roosevelt's corollary to the monroe doctrine

65. ## trig

if x=4 tan theta, express cos(2 theta) as a function of x

66. ## Math( help please ! )

The height of a ball thrown vertically upward from a rooftop is modelled by y=-5t^2+20t+50 , where h(t) is the ball's height above the ground , in meters , at time t seconds after the throw a) Determine the max height of the ball b) how long does it take

67. ## chemistry

Calculate the number of grams of CO2 is produced from 58.0g of glucose? ______g. CO2

68. ## Physics

A 6.80 g coin is placed 10.0 cm from the center of a turntable. The coin has a coefficient of static friction of 0.80 and a coefficient of kinetic friction of 0.60 with the turntable. The turntable's angular velocity slowly speeds up until the coin starts

69. ## Chemistry

In a 1.0x10^-6 M soltution of HNO3(aq), identify the relative molar amounts of these species. H2O , HNO3, H3O+,NO3-, OH-

70. ## language

B. Write the complete predicate in each sentence. Underline the verb in the complete predicate. 1. People share beautiful parks. 2. They make plans for their neighborhood activities together. 3. Voters give their opinions on mayor issues. 4. Businesses

71. ## biology

A woman has difficulty becoming pregnant and when her karyotype is examined it is found that she is heterozygous for a large reciprocal translocation between her second and seventh chromosomes. a) is it possible for her to have a child? b) How can her

72. ## Biology

All cell are surrounded by membranes. The main role of the cell membrane is to A.regulate the cell's interactions with the environment b.release any type of molecule out of the cell c.arrange the cell's organelles in the cytoplasm d.prevent water from

73. ## Chemistry

Determine the frequency of light with a wavelength of 3.728 × 10 −7 cm. Answer in units of Hz Given the speed of light as 3.0 × 10 8 m/s, calculate the wavelength of the electromagnetic radiation whose frequency is 9.7 × 10 12 Hz. Answer in units of

74. ## Biology

Which root system is most effect anchor? And which is the most effective for storage of nutrients, why? I thought that the best anchor would be the taproot but I don't know how to figure out which is best for storing nutirents?

75. ## Science

What color does iodine turn into if starch is present?

76. ## History

how would you have felt if you were an american and you found the Zimmerman note? In other words what is the Zimmerman note?

77. ## algebra

15x^2 / 15x+10 simpfly each and exclude the values

combina las palabras y escribe una oracion que indica lo que dicen los vendedores y los clientes example yo/ a los amigos :yo /buscar/ aretes / plata answer les digo que busco unos aretes de plata 1 vendor/a mi:aretes/ costar/50/pesos 2 yo/al vendedor:

79. ## geometry

If the base of an isosceles triangle has a length of 10, what is the shortest possible integral value for the length of each of the congruent sides?

80. ## Socials

Is billy bishop's diary a primary source? Evaluate it as a historical source. Please help. Not quite sure what this means. don't understand what the second part is telling me to do. thanks.

81. ## statistics

The Frayed Nerves Anxiety Scale (FNAS) is used to measure the anxiety level of people on a scale from 0 to 1000. Four students were randomly chosen and given the FNAS before their second exam. Their scores were 700, 653, 740, and 707. The standard

82. ## algerbra 2

x^5*x^3 simplify the expression

83. ## algerbra 2

x^5*x^3 simplify the expression

84. ## History

Are ninjas real?

85. ## History

what did conscientious objectors do during world war one

86. ## Chemistry

Please!!! its extremely urgent. i do not need answers, only how to do it A sample of nitrogen gas (N2) kept in a container of volume 10.1 L and at a temperature of 20.3°C exerts a pressure of 3.1 atm. Calculate the number of grams of gas present. Round to

87. ## science

you and a child are on skates and you give each other a push. if the mass of the child is half your mass, who has the greater acceleration? by what factor? i know it is the child but im not sure about the factor. im pretty sure the answer has something to

88. ## English Composition

We are to write a paragaph on how contentment plays a part when we balance school, work, and family. I'm not sure how to start.

89. ## social studies

How did the spice trade inspire people to come to america

90. ## social studies

Why did the people during the middle age fight in the crusades

91. ## Chemistry

Doing some practice problems, these are a couple of my answers. Are these written correctly? Write the conjugate acid: a)HPO4(2-) Answer: HPO4(2-) + H(+) --> H2PO4(-) b)NO2(-) Answer: NO2(-)+ H(+) --> HNO2

92. ## Chemistry

In this reaction, 4.58 L of O2 were formed at 745mm Hg and 308 K. How many grams of Ag2O decomposed. 2 Ag2O----> 4 Ag + O2 Please help I'm very confused

93. ## stats homework help

A true-false test consists of 50 questions. how many does a student have to get right to convince you that he is not merely guessing Explain

94. ## social studies

When king henry died who took the throne

95. ## CHEMISTRY

In a 1.0x10^-6 M soltution of HNO3(aq), identify the relative molar amounts of these species. H2O , HNO3, H3O+,NO3-, OH-

96. ## social studies

How did reading help the middle class

97. ## trig

cos 8 degrees fo feet 25 inches??

98. ## Maths (Linear Equation)

Nine books are to be bought by a student. Some cost \$6.00 each and the remainder cost \$6.50 each. If the total amount spent was \$56, how many of each book are bought?

99. ## U.S History

What is the Native American group that allied with Pitt's British troops?

100. ## physics

A crate of weight Fg is pushed by a force on a horizontal floor. (a) If the coefficient of static friction is μs, and is directed at angle θ below the horizontal, show that the minimum value of P that will move the crate is given by the following

50 feet

102. ## Math

Nine books are to be bought by a student. Some cost \$6.00 each and the remainder cost \$6.50 each. If the total amount spent was \$56, how many of each book are bought?

103. ## social studies

What is feudalism

Two acrobats, each of 78.0 kg, launch themselves together from a swing, holding hands. Their velocity at launch was 6.80 m/s and the angle of their initial velocity relative to the horizontal was 28.0 degrees upwards. At the top of their trajectory, their

105. ## math

my equation is m 2=c. I want to use my equation to find the cost of a 60-mile trip.

106. ## chemistry

What pressure (atm) is exerted by a column of ethanol 49.0 cm high? The density of ethanol is 0.789 g/cm3 and 9.8m/s2 as your gravitational constant.

107. ## chemistry

A 45.3 cm3 bubble of air at 1 atm pressure is subjected to a new pressure of 4.7 atm. What will be the new volume (cm3)?

108. ## social studies

What did they discover on the way back to europe

109. ## geometry

what is the height of a cone with a volume of 66 cubic centimeters and a base with a radius of 3 centimeters

110. ## chemistry

A balloon is filled with 2.2 cm3 helium gas at 132.4 atm pressure. What will be the new pressure (atm) if the volume is changed to 68.6 cm3?

111. ## algebra

Dale is choosing between two exercise routines. In Routine #1, he does only running, burning 10 calories per minute. In Routine #2, he burns 10 calories walking. He then runs at a rate that burns 8 calories per minute. For what amounts of time spent

112. ## home inesurace

The lump sum payment survivors receive from social security to help pay funeral and burial expenses is A.\$255 B.\$785 C.\$1,000 D.\$2,500

113. ## math stats

A true-false test consists of 50 questions. how many does a student have to get right to convince you that he is not merely guessing Explain

114. ## Chemistry

So if i want to write the conjugate base for NH3, NH3 NH2 + H(+)

Draw two ways to show 43 using place-value blocks.

116. ## spelling

____ rules are loosely enforced

117. ## Physical Science

What kind(s) of particles make up (a) gaseous compound (b) liquid compound (c) solid compound?

118. ## Physics

Commercial aircrafts usually bank at an angle of no more than 30.0 degrees when turning. At 30.0 degrees of bank, how many g's of lift must the aircraft pull if it is to maintain uniform circular motion without losing altitude?

119. ## algebra

The perimeter of a rectangular field is 312 yards. If the length of the field is 93 yards what is its width?

120. ## Math: Calculus

Assume that a population size at time t is N(t) and that N(t)=40 x 2^t , t>0. Show that N(t)=40e^t ln2 Can someone please guide me step by step on this question? Im really confused. thanks. I tried to work it out, and this is what I got. N(t)= 40 x 2^t =

121. ## Physics

A ferry is crossing a river. The ferry is headed due north with a speed of 2.8 m/s relative to the water and the river’s velocity is 4.9 m/s to the east. a) What is magnitude of the boat’s velocity relative to Earth

122. ## Chemistry

A sample of the compound prepared in this experiment, weighing .1021g, is dissolved in HNO3 and diluted to a volume of 100mL. A 10mL aliquot of that solution is mixed iwth 10mL 6 M NH3. The [Cu(NH3)4 2+] in the resulting solution is 5.16x10^-3 M. How many

123. ## Physics

A ferry is crossing a river. The ferry is headed due north with a speed of 2.8 m/s relative to the water and the river’s velocity is 4.9 m/s to the east. a) What is magnitude of the boat’s velocity relative to Earth

124. ## Math

A craft store needs 5,126 yards of special order ribbon and 2,654 yards of a velvet ribbon. The ribbons come pre-packaged on rolls of 30 yards each. How many rolls will be in the order?

125. ## English

Could you please check these two sentences, please? 1) Dorian wishes he would stay young forever whereas the portrait would grow old in his place. 2) According to Wordsworth, man and nature are (were) two different but inseparable parts of the same

126. ## chemistry

What is the pH of a 0.150 M NH4CN

127. ## temperture

c= 5over9 (f-32)

128. ## physics

Imgaine that a cart intially moving with velocity V_0, collides with a cart at rest and then the two carts stick together. Find a equation for potential energy in this case.

129. ## Chemistry

What pressure (atm) is exerted by a column of ethanol 49.0 cm high? The density of ethanol is 0.789 g/cm3 and 9.8m/s2 as your gravitational constant.

130. ## Chemistry

125 mL of 1.00 HCl with 9.00 g of KOH. if the yield of KCL is 7.51 g what is the percent yield of the reaction

131. ## social studies

What was the religious reason why people left europe

132. ## Chemistry

A 143.8 cm3 bubble under the ocean at 2.8 atm and 14.3oC surfaces to 1.0 atm and 22.6oC. What is the new volume (in cm3)?

133. ## Chemistry

Where two liquid substances are mixed together and a solid forms by a chemical reaction, the solid is known as what? Is it heterogeneous mixture? The fact that paper burns and turns into different substances is known as ____ ____of paper? I honestly am

134. ## Bio Lit

Haiku on a Cell

135. ## Chemistry

At what temperature (oC) will a gas sample occupy 9.8 L if it originally occupies 14.2 L at 25.9oC?

136. ## physics

How do you find a velocity-time graph from a position-time graph. pls help. i do not understand how to do it

137. ## Bio lit

limerick on cell

138. ## physics

How do you find a velocity-time graph from a position-time graph. pls help. i do not understand how to do it

139. ## Chemistry

At 36.4°C a sample of ammonia gas exerts a pressure of 8.3 atm. What is the pressure when the volume of the gas is reduced to one-fourth of the original value at the same temperature.

140. ## Chemistry 12

Calculate the pH of the solution that results when 27.38mL of 0.15M H2SO4(aq) is mixed with 18.50mL of 0.19M Ca(OH)2 (aq)

141. ## physics

How do you find a velocity-time graph from a position-time graph. pls help. i do not understand how to do it

142. ## CHEMISTRY

Assuming equal concentrations , rank these solutions by pH. RbOH(aq), NH3(aq), HF(aq) HBr(aq), Ca(OH)2(aq).

143. ## Chemistry

A sample of nitrogen gas (N2) kept in a container of volume 11.7 L and at a temperature of 23.3°C exerts a pressure of 2.6 atm. Calculate the number of grams of gas present.

144. ## Biology

All cell are surrounded by membranes. The main role of the cell membrane is to A.regulate the cell's interactions with the environment b.release any type of molecule out of the cell c.arrange the cell's organelles in the cytoplasm d.prevent water from

145. ## calculus

Find the cubic function of the form y=ax^3 + bx^2 + cx + d which has a relative maximum point at (0,2) and a point of inflection at (-1,-2). How do I even start this one?

146. ## Chemistry

125 mL of 1.00 M HCl with 9.00 g of KOH. if the yield of KCL is 7.51 g what is the percent yield of the reaction HCl + KOH -> KCl + H2O

147. ## Math

Can you list all the COMPOSITE numbers less than 100 whose units digit is 3 ?

148. ## bio lit

Concrete Poem on a cell

149. ## Physics

1. Carlos jogs in a straight line at a constant speed of 1.5 m/s. He passes by Victoria, who, 10 seconds after Carlos had passed her, starts accelerating at a constant rate of 0.50 m/s^2 a) How much time after the passing of Carlos does it take Victoria to

150. ## geometry

if ab is perpendicular to bc find the measure of each angle in the figure below

151. ## social studies

How did the spice trade inspire people to come to america

152. ## social studies

What was promised in the mayflower compact

153. ## general chemistry

A 0.500 g sample of a BaCl2•2H2O/Na2SO4 salt mixture, when mixed with water, filtered, and dried, produced 0.225 g of BaSO4. The Na2SO4 was determined to be the limiting reactant.

154. ## Physics

A student ties a 600.0 g rock to a 1.50 m-long string and swings it around her head in a horizontal circle. At what angular speed (in rev/min) does the string tilt down at a 13.1° angle, assuming that the local acceleration due to gravity is -9.80 m/s2?

155. ## physical science

Would you expect magnesium or calcium to be the more active metal? Explain your answer in terms of atomic structure.

156. ## Geography

I just want to make sure that I have the correct answers for 2 questions: 1. The western part of North America is more mountainous than the eastern part. 2. Chile is the longest country in South America.

157. ## physical science

The ionization energies of Li, Na, K, Rb, and Cs are respectively 5.4, 5.1, 4.3, 4.2, and 3.9 eV. All are in Group 1 of the periodic table. Explain the decrease in ionization energy with increasing atomic number in this group.

158. ## Tetraploid species

Tetraploid species hybrid = example of a) aneuploidy b) autopolyploidy c) allopolyploiy d) endomitosis B? Down's syndrome = a) aneuploidy b) polyploidy c) triploidy d) autopolyploidy A? How do you increase large amounts of DNA in lab for region of 100kb

159. ## Statistics

In terms of the mean and standard deviation: -What does it mean to say that a particular value of x has a standard score of +2.1? -What does it mean to say that a particular value of x has a z-score of -2.4?

160. ## Statistics

A student scored 81 percent on a test, and was in the 77th percentile. Explain these two numbers.

2000N

162. ## Statistics

In each of the four examples listed below, one of the given variables is independent (x) and one of the given variables is dependent (y). Indicate in each case which variable is independent and which variable is dependent. I. Rainfall; Crop yield II. Taxi

163. ## Physics

A 570.0 g ball moves in a vertical circle on a 103.0 cm-long string. If the speed at the top is 4.30 m/s, then the speed at the bottom will be 10.65 m/s. (you'll learn how to show this Chapter 10.) What is the gravitational force (in N) acting on the ball?

164. ## trig

Two pilots take off from the same airport. Mason heads due south. Nancy heads 23º west of south. After 400 land miles, how far is Nancy from Mason’s route? Round your answer to the nearest tenth of a mile. (Enter only the number.)(If someone had helped

165. ## World History

Explain why there was a conflict over the creation of Israel

166. ## Statistics

Scores on the Stanford-Binet Intelligence scale have a mean of 100 and a standard deviation of 16, and are presumed to be normally distributed. A person who scores 68 on this scale has what percentile rank within the population?

167. ## Chemistry Help!!

when triangle s (entropy) is positive does that mean that the disorder has increased or decreased? Explain

168. ## physics

ojee a benz mechanic tries to remove an engine from a car by attaching a chain to it from a point directly overhead and then pulling sideways with horizontal force F.if the engine has mass 180 kg.what is the tension in the chain when it makes an angle

169. ## Statistics

SAT I scores around the nation tend to have a mean scale score around 500, a standard deviation of about 100 points, and are approximately normally distributed. What SAT I score within the population would have a percentile rank of approximately 16?

170. ## physics

ojee a benz mechanic tries to remove an engine from a car by attaching a chain to it from a point directly overhead and then pulling sideways with horizontal force F.if the engine has mass 180 kg.what is the tension in the chain when it makes an angle

171. ## math

how do you show work for 69 divided by 50

172. ## Statistic

A distribution has a standard deviation of ó = 9.5. Find the z-score for a score above the mean by 4 points. note: round to 2 decimal places, and enter the value of the z-score but do not write "z = " in your answer

173. ## math

how do you show work for 69 divided by 50

174. ## Physics

Can the coefficient of static friction be greater than one? Less than zero? How about for the coefficient of kinetic friction? Please explain.

175. ## Human Geo.

Are there any squatter settlemets in French Guiana? Is there any terrorist activity in French Guiana, and if so what types? Can you please calculate the Agricultural density of French Guiana and show your work. What is the Natural Increse Rate of French

176. ## College Chemistry

i was told to Convert 1 metric ton to grams ore then to grams TiO2 (using the 0.75% in the ore), then to g TiCl4 (using the 70%%) and finally to TiO2 final product (using the 93.0%)for the following questions, but im stuck after converting the metric ton

177. ## english

hi can you please proof read this and make sure it sounds alright. thanks. Playboy of the Western World is a novel that invoked hostility from nationalist crowds in Dublin. Throughout the book there were several occasions where violent reactions could have

178. ## chemistry

How many grams of LiH are needed to fill a 3.3 L life belt with hydrogen gas at 0.93 atm and 28.5°C?

179. ## social studies

who were the first slaves in the new world? How did the first African slaves reach the Americas?

180. ## Calculus

Assume that x>0 and y>0. If y=5sqrt{x+9} and dx/dt = 2, find dy/dt when x=7.

181. ## calculus

A chain saw requires 2 hours of assembly and a wood chipper 5 hours. A maximum of 20 hours of assembly time is available. The profit is 150 on a chain saw and 230 on a chipper. How many of each should be assembled for maximum profit.

182. ## English

I forgot to include the following sentences. Thank you. 1) Wordsworth recollects/recounts the experience of a walk he went on/for with his sister Dorothy, near their home in the Lake District. 2) The poet is completely detached from the outside world. He

183. ## Chemistry Help!!

Arrange the following systems in order of increasing randomness or disorder(bring with the most ordered system) 1 mol liquid ammonia 1 mol gaseous ammonia 1 mol solid ammonia

184. ## Education

What is the background of poor porfamance primary schools?

185. ## Calculus

F(x) = cos(x) • the integral from 2 to x² + 1 of e^(u² +5)du Find F'(x). When i did this, i got: -2xsin(x)e^((x²+1)² + 5) But my teacher got: -sin(x) • the integral from x² + 1 of e^(u² +5)du + 2xcos(x)e^((x²+1)² + 5) Do you know why the

186. ## Calculus

A particle, initially at rest, moves along the x-axis such that its acceleration at time t>0 is given by a(t)=cos(t). At the time t=0, its position is x=3. How do I find the position function for the particle? I tried integrating the equation but got

187. ## gen/105

Suppose you had to write a paper on academic honesty in higher learning. Conduct an Internet search on this topic and answer the following questions: What search engines did you use? What search techniques did you use? What Web sites did you visit? Comment

-7-2

189. ## Physics

A boy has a mass of 45 kg and is running with a velocity of 8 m/s. Find the boy's kinetic energy.

190. ## English

Solve and show work for each proportion. 2x-2/14 = 2x-4/6 x+2/6 = x-1/12

192. ## world

Monotheism, a religious doctrine that recognizes a single supreme god, first arose in Southwest Asia around _________ BC.

193. ## Chemistry Help!!

Predict whether triangle s would be positive or negative for each of the following; give a reason for your answer.

194. ## Math/Calculus

After 5 days, a particular radioactive substance decays to 37% of its original amount. Find the half life of this substance. Is this right? Th= ln 2/ln(1/.37) x 5 days

195. ## physics

A canoe has a velocity of 0.39 southeast relative to the earth. The canoe is on a river that is flowing 0.59 east relative to the earth. Find the magnitude of the velocity of the canoe relative to the river. Find the direction of the velocity of the canoe

196. ## social studies

What make the Spanish go to coast of mexico?

197. ## SULOCHANDEVI SINGHANIA SCHOOL

Express 0.143 as a rational number

198. ## Education

What is the background of poor porfamance primary schools?

199. ## History

how did the atlantic slave trade reflect the times during which it existed?

200. ## Calculus

Given that y=x^(5/2)- x^(-1/2) . a) Find the coordinates where the tangent line is parallel to the line y-4x-4=0. b) Find the coordinates where the tangent line is perpendicular to the line 2y-3x-12=0.

201. ## Science

when heat and change of temperature happens this occurs what?

202. ## Statistics

A set of 50 data values has a mean of 35 and a variance of 25. I. Find the standard score (z) for a data value = 26. II. Find the probability of a data value > 26.

203. ## math

what is 13+x=0 ?

204. ## Physical Education

Im just wondering, why isnt it an elective?

205. ## chemistry

a solution of an unknown metal chloride (0.8870 g) was treated with silver nitrate to yield (1.9132 g). calculate the percentage by mass of chloride in the unknown chloride

206. ## chemistry

a solution of an unknown metal chloride (0.8870 g) was treated with silver nitrate to yield (1.9132 g). calculate the percentage by mass of chloride in the unknown chloride

207. ## Math

what is the square root of -1

asked by rock a by zombie
208. ## physics

A bowling ball weighing 40.0 N initially moves at a speed of 4.90 m/s. How long must a force of 54.0 N be applied to the ball to stop it?

209. ## probability

8. (New Hare-Hunting Problem) In the woods, a hunter is shooting at a hare. The probability of success for his first shot is ½. If he misses the first shot, the probability of success for his second shot is 1/4. If he misses again, the hunter takes his

210. ## math

I learned that to make fraction into a percent just multiply with 100.However I tried to do 3/2 to percent it become 150 percent. In my understanding 2/3 is 1.5% please clarify

211. ## Health

Disease Trends and the Delivery of Health Care Services I need a final paper on this topic. any help would be wonderful. will give more information when someone is willing to help. Thanks

212. ## botany

why are green algae classified as plants and noy proyists?

213. ## Botany

what kind of plants have life cycle that last several years?

214. ## Spelling Skills

Use the spelling words in the boxes below to complete the story. Then use proofreading marks to correct mistakes in the use of capital letters and periods.

215. ## trig

as the sun rises it casts a long shadow over a boy who is leaning next to a tree. the tree is 35 feet tall and the sun's rays create an angle of depression of 70 degrees with the top of the tree. how long is the shadow

216. ## physics

A marble block of mass m1 = 500.1 kg and a granite block of mass m2 = 237.4 kg are connected to each other by a rope that runs over a pulley, as shown in the figure. Both blocks are located on inclined planes with angles á = 35.3 degrees and â = 56.7

217. ## social studies

Who were the first slaves in the New World?

218. ## PHYSÝCS

Find the speed of a satellite in a circular orbit around the Earth with a radius 3.65 times the mean radius of the Earth; RE= 6.37·103 km ME= 5.98·1024 kg

219. ## Hum Media 176

What media sources are used to obtain news?

220. ## Science, Geology

How are polonium halos evidence for rapid hydrothermal flow and rapid metamorphism in the Smoky Mountains?

221. ## PHYSICS

a car traveling at a constant velocity of 30 m/sec passes an intersection at time t=0 45 seconds later a second car passes the same intersection and its traveling in the same direction at a constant velocity of 55 m/sec. when does the second car overtake

222. ## math

3a to the third plus 12a squared minus 63a

223. ## geometry

if a measure of an angle is -2x^2+19x and the measure of it's supplement is 4x^2-6 what's the measure of angle and supplement

224. ## Math( help please ! )

The height of a ball thrown vertically upward from a rooftop is modelled by h(t)=-5t^2=20t=50, where h(t) is the ball's height above the gorund,in meters, at time t seconds after the throw a) determine the maximum height of the ball b) how long does it

225. ## Math( help please ! )

The profit p(x) of a cosmetics company , in thousands of dollars . is given by p(x) =-5t^2=400x-2550, where x is the amount spent on advertising in thousands of dollars a) determine the maximum profit the company can make b) dtermine the amount spent on

226. ## Hum Media 176

Do we have too many media choices? Do 24-hour cable-news networks such as CNN and Fox News enhance our ability to find information or hamper it? Are 24-hours news stations necessary?

227. ## Comp 156

What is the definition of a cause and effect essay? Describe a cause and effect situation related to the effect of video games addiction on society

228. ## Math( help please ! )

determine the maximum or the minimum of a)2x^2+12x

229. ## Science

what type of plants that leave several years?

230. ## physics

light travels at a constant speed of 3x10^11 cm /sec how long does it take light to reach the earth a distance of 1.5x10^8 km give your answer in seconds and minutes.

231. ## science

how do iron bits attract magent

232. ## math

how can i estimate 28times8times89.

233. ## Biology

What is Ethology?

234. ## physics

You are pushing a 30-kg wooden crate across the floor. The force of sliding friction on the cate is 90 N. How much force, in newtons, must you exert on the crate to keep it moving with constant velocity?

235. ## statistics

given the data set below what would be the percentile rank of the number 6 2;8;6;9;5

236. ## science

The specific heat of silver is 0.057 calories/gram°C. If 10.0 grams of silver were heated and the temperature of the sample changed by 20.0°C, how many calories of heat energy were absorbed by the sample? (A)3,508 calories (B)0.029 calories (C)11.4

237. ## dbm 380

• Create a detailed ERD using the Entities and Attributes for Driver's Log document found on the Huffman Trucking Intranet site.

You have decided to develop a worksheet for each manufacturing facility manager to submit each week. It should show total production and revenue, and total scrap and cost for each product for the week, if a facility drops below 5,000 units of production on

239. ## physics

Question Part Points Submissions Used An aluminum block, m1 = 3.00 kg, and a copper block, m2 = 1.14 kg, are connected by a light string over a frictionless pulley. They sit on a steel surface as shown in the figure below, where θ = 45.0°. (See the table

240. ## trig

find the exact values of the six trig functions of theta equals six pi divided by 8

241. ## Physical Science

The physical properties of ice are different from the physical properties of dry ice (frozen carbon dioxide). But the physical properties of gaseous water vapor and the physical properties of gaseous carbon dioxide are the same. Why? A.) The valence

242. ## English

I urgently need to express in words the following diagram which illustrates the process of poetic creation. 1. sensory experience. 2. emotion 3. recollection in tranquillity. 4 contemplation of emotion. 5. production of kindred emotion. 6. poetry. The

243. ## chemistry

a solution of an unknown metal chloride (0.08870 g ) was treated with silver nitrate to yield AgCl ( 1.9132 g ). calculate the percentage by mass of chlorine in the unknown chloride

244. ## chemistry

a solution of an unknown metal chloride (0.08870 g ) was treated with silver nitrate to yield AgCl ( 1.9132 g ). calculate the percentage by mass of chlorine in the unknown chloride

246. ## physics

is it possible to launch satelite whìch rotates just above kathmandu?

247. ## History

Name the two major alliance at the beginning of world war 1. And what three countries made up the Triple Entente?

248. ## Science

what kind of plants have life cycle that last several years?

249. ## Math

Let k be a positive integer and p a prime number. Show that if p^2 is a factor of k, but p^3 is not a factor of k, this implies that k^(1/3) is not a rational number. Regards

250. ## History

Did wilson put trade restrictions on germany as one of his 14 points?

251. ## U.S History

WHAT EVENTS LED UP TO THE BOSTON TEA PARTY

252. ## Anthropology, sociology and psychology

How can communication shape human behavior? pls help

253. ## physics

a fire hose held near the ground shoots water at a speed of 6.5m/s at what angle should the ozzle point in order that the water land 2.5m away? why are there two different angles?

255. ## Calculus

suppose a balloon used in angioplasty is a 30mm long cylinder, with hemispherical caps at both ends.Determine a relationship between the rate of change in the volume of the balloon and the rate of change of its diameter.

256. ## economics

5. A market contains a group of identical price-taking firms. Each firm has a marginal cost curve MC(Q) = 2Q, where Q is the annual output of each firm. A study reveals that each firm will produce if the price exceeds \$20 per unit and will shut down if the

257. ## calculus

for a given patient it is determined that the blood vessel may rupture if its diameter increases faster than 200 um/s. The blood vessel starts with diameter 4mm and needs to expand to a diameter of 7mm. Is it safe to inflate the balloon at a constant rate

258. ## Biology

Is the pancreas an exocrine or endocrine gland? Indicate the anatomical evidence on your fetal pig. What are its contributions to digestion and where are they added to the digestive tract?

259. ## Science (Physics)

Two 1.5 kg balls move away from each other, one traveling 9 m/s to the right, the other 2 m/s to the left. What is the magnitude of the total momen- tum of the system? Answer in units of kg · m/s

260. ## Calculus

find the critical numbers of the function: h(p)=p-1/p^2+4

261. ## math

How can you divide m by 3 using an input and out put table?

262. ## geography

If it is summer in Africa whatis it saudi arabia?HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

263. ## language

Verbs in Predicates A. Write the verb in the complete predicate. 1. They climb mountain. 2. They sit by waterfalls. 3. Rangers share nature stories. 4. Guides explain different areas. 5. Visitor like the area. Answer 1. Climb mountains. 2. Sit by

264. ## algerba 2

3x-2y=12 solve the equation for y

265. ## Algebra

How do I graph a line given its equation? The equation is -3x + 2y = 2

266. ## Physical Science

Estimate the volume of an atom of iron 56Fe given atomic number: 26 A.) 8.6 x 10-24 cc B.) 1.2 x 10-23 cc C.) 2.4 x 1024 cc D.) 3.6 x 1024 cc

267. ## Math

Can you list all composite numbers less than 100 whose unit's digit is 3 ?

268. ## History

what were 5 new weapons used in world war 1?

269. ## managerial accounting

Werntz furniture had actual sales for July and august and forecasted sales for September, October, November and December as follows: Actual: July………………………………………………………….\$ 98,000

270. ## Anatomy

Given the idea that muscles pulling on bones causes movement of the body. Explain the actions that occur as a person takes two steps. (Describe muscle contractions and relaxations in both the leg leaving the ground and the one remaining on the ground.)

271. ## managerial accounting

For year ended December 31, 2006, firm a produced and sold 12,000 units of product. Fixed expenses associated with producing the product totaled \$4000 for the year. A variable cost of \$3.20 per unit was incurred to produce the product. Fixed expenses

272. ## Biology

Which internal organs of the fetal pig appear to have the greatest amounts of blood supplied to them? Why does this make sense?

273. ## English

I left out 2 sentences I'd like you to check. Thank you. 1)Sybil is the only thing Dorian cares about (is for possible?). French artists devoted themselves to the search of beauty. 2) They persued any kind of sensations. After lookig at the picture, Lord

274. ## statistics

what is a t-test

275. ## algebra world problems

1) the odometer on your car reads 20,186.7 after going 62.3 miles. write and solve an equation to determoine how many miles were on the odometere before going 62.3 miles. i wrote this; 0-62.3 = 20,186.7 2) michael bought a \$25.00 gift for a friend. After

276. ## Physics

A 70 kg block is pulled at a constant speed of 6.4 m/s across a horizontal floor by an applied force of 102 N directed 37° above the horizontal. What is the rate at which the force does work on the block?

Could you please check if these are correct? Thank you- 1.¿Necesitas monedas para coleccionar monedas? Sí. Las necesito para coleccionar monedas. 2. .¿Necesitas el bate para jugar al tenis? No,lo necesito para jugar al tenis. 3. Me hablas? Sí, te

278. ## science

how long does a teenager need to sleep at night?? my teacher asked this question and if you get it right, you get 2 extra points on a test, so please help me!!

279. ## spanish

Dónde pone la Sra. Quintana la tarea

280. ## American Government

What was the name of the nonmilitary struggle between the United States and its allies (anti-Communists) and the former Soviet Union and its allies (Communists) that began shortly after World War II and continued through the 1980s? a. Cold War. b.

281. ## Chemistry

"Suppose some sort of clamp is applied to hold an electron fixed at the distance of 2.5 Angstroms from a lithium nucleus Li3+ which is also clamped into position. Calculate the magnitude of the force between the two fixed particles." The books says the

282. ## Chemistry

A 12 g sample of an unknown compound contains 3.489 g of sodium and 4.870 g of sulfur. The rest is oxygen. Name the compound Thank you!

283. ## physics

if a bus traverses a distance of 10,000 cm with the uniform velocity of 10 m/sec, what is its total time of travel?

284. ## Fluid Mechanics

. A plate of mass M is suspended between two opposing jets, each of area A, velocity Vo and density . The plate is suddenly given a velocity Vo parallel to one of the jets. Determine the subsequent motion of the plate (x(t)), and the maximum

285. ## Human Geo

what languages are spoken in French Guiana? For each language can you provide the percentage of it.

286. ## English

In Playboy of the Western World by J.M. Synge what are some characteristics or moments that would invoke a violent reaction in todays culture?

287. ## statistics

Smith is a weld inspector at a shipyard. He know from keeping track of good and substandard welds that for the afternoon shift 5% of all welds done will be at substandard. Smith checks 7500 shifts completed that shift and finds that 300 of them are

288. ## math

write an equation of the line containing the specified point and perpendicular to the indicated line? (-2,-5),x-2-2y=3

289. ## Physics

An Olympic long jumper is capable of jumping 8.3 m. Assume that his horizontal speed is 9.5 m/s as he leaves the ground. He was in the air for .87 seconds. How high does he go assuming that he lands upright, the same way he was when he left the ground?

290. ## Chemistry

What would be the number of elements in the fourth row of the periodic table?

291. ## algebra2

x+1/2y=5 solve the equation for y show steps

292. ## Science

In drosophila , short wings , and black colour are reccessive traits.long wings and grey colour are dominant. show the cross results between a short winged , heterozygous grey fly and a heterzygous long winged grey fly

293. ## science

A model rocket blasts off from the ground, rising straight upward with a constant acceleration that has a magnitude of 86.9 m/s2 for 1.69 seconds, at which point its fuel abruptly runs out. Air resistance has no effect on its flight. What maximum altitude

294. ## physics

To make a bounce pass, a player throws a 0.70-basketball toward the floor. The ball hits the floor with a speed of 5.9 at an angle of 70 to the vertical.If the ball rebounds with the same speed and angle, what was the impulse delivered to it by the floor?

295. ## algebra 2

where do these two lines intersect?2x+3y=54 and 6x+9y=-54

296. ## algerba 2

x=4y-1 solve the equation for y show steps

297. ## social studies

What is another name for a tribe's tribal healer/medicine man/ spiritual leader?

298. ## chemistry

How many milligrams of magnesium palmitate will precipitate from 965ml of this solution when it is cooled from 50C to 25C? For Mg(C16H21O2)2, Ksp= 4.8x10(-12) at 50C and 3.3x10(-12) at 25C.

299. ## Biology

Name all the structures that bile passes through (in order) from its creation to where it actually functions.

300. ## Physics

A 70 kg block is pulled at a constant speed of 6.4 m/s across a horizontal floor by an applied force of 102 N directed 37° above the horizontal. What is the rate at which the force does work on the block?

301. ## Math

A doctor asked 200 people over the age of 50 whether they suffered from depression or heart disease. The results were 16 suffered from depression, 28 suffered from heart disease and 24 suffered from both. In a group of 5000 people over the age of 50, how

302. ## College Physics

For the system of two crates and a pulley in Figure P9.14, (m1 = 28.5 kg, m2 = 10 kg, mpulley = 8 kg), what fraction of the total kinetic energy resides in the pulley?

303. ## Calculus

(A) Given that P = {X0, X1, X2.......Xn} is an arbitrary partition of [a,b], find the lower and upper sum for f(x)=x+3. (B) Use your answers to part (a) to evaluate the integral of f(x) from a to b.

304. ## stats

Find the probability that the company will meet its goal on a particular 50 miles of line

305. ## trig

A third point C lies on the ground 5.4m from N the angle of depression of C from R is X degrees. Calculate to the nearest degrees the value of X.

306. ## biology

Suppose we want to maintain a large number of homozygous lethal chromosomes, exposed to chemical mutagens, for a mutation screening experiment in a small orb web building spider species. One of these lines has a dominant mutant named Disordered (D) that

307. ## pre calculus.

x is a first quadrant angle. In what quadrant(s) does the terminal side for 2x lie?

308. ## biology

An individual with Down's syndrome has repeat length alleles of size 8, 13, and 14 for a microsatellite near the centromere of chromosome 23. Her mother is homozygous for the 13 repeat allele. Her father is heterozygous for 8 and 14. What can we say about

309. ## Chemistry

What is the value of Kf for the formation of the ammine M(NH3)2+ ? Assume the concentration of M(NH3)n+ = 0.0020 M The data were graphed giving a straight line plot with an equation of y = -5.9484x - 9.4.

310. ## math

Lan has 6 books for each book he has 2 science books he has 2 animl books how many books does have

311. ## hvac

calculate the amount of heat required to change 5 pounds of ice at 32 degrees to water 32 degrees

312. ## Physics

A 70 kg block is pulled at a constant speed of 6.4 m/s across a horizontal floor by an applied force of 102 N directed 37° above the horizontal. What is the rate at which the force does work on the block?

313. ## statistics

From the MM207 Student Data Set identify the following: a) A variable measured at the nominal level of measurement. b) A variable measured at the ratio level of measurement. c) A variable measured at the ordinal level of measurement

314. ## Calculus

Find f'(x) for f(x)=sec^2x^2

315. ## american history

who won the election of 1920 and what was his promise to the nation?

316. ## Biology

In drosophila , short wings , and black colour are reccessive traits.long wings and grey colour are dominant. show the cross results between a short winged , heterozygous grey fly and a heterzygous long winged grey fly

317. ## physics

In the Atwood machine shown below, m1 = 2.00 kg and m2 = 6.00 kg. The masses of the pulley and string are negligible by comparison. The pulley turns without friction and the string does not stretch. The lighter object is released with a sharp push that

318. ## math

my equation is y= -x-3. the y-intercept is (0,-3) and the slope is -1. if i were to draw a chart starting from x being -3. would it be like this: (-3,0) (-2,-1) (-1,-2) (0,-3) (1,-4) (2,-5) (3,-6) just want to know if it is correct

319. ## physics

A block of mass m = 2.00 kg is released from rest at h = 0.400 m from the surface of a table, at the top of a θ = 35.0° incline as shown below. The frictionless incline is fixed on a table of height H = 2.00 m. (a) Determine the acceleration of the block

320. ## trig

the basic N of an antenna rests on horizontal ground. the angle of elevation of the top R from a pt H on the ground is 42 degrees

321. ## geometry

If the sum of the lenghts of two sides of a triangle is 15, what is the largest possible integral value for the third side?

322. ## Math( help please ! )

Determine the maximum of or the minimum value of y=2x^2+12x

323. ## home insurance

The U.S congress added disability insurance to the social security act in 19___. A.35 B.54 C.65 D.72 i got A

324. ## HS - English

I need an example of how to write an annotated bibliography for the book No Country For Old Men. everytime I redo the assignment my teacher says I am just writing a summary not really an annotated bibliography

325. ## physics

one gram of gold can be drawn into a wire 2.25 km long. What is the resistance of such a wire at 20°C?

326. ## spanish/ pleeease help me

Say what the salespeople and customers tell each other .(indirect object pronouns)example: yo/a los amigos :yo / buscar / aretes/ plata answer: les digo que busco unos aretes de plata 1 vendor/a mi:aretes/ costar/50/pesos 2 yo/al vendedor: aretes/ ser/caro

327. ## hvac

what is the required input in watts to operate a 70 percent efficient three-horsepower electric motor

328. ## Science

WHY is chlorophyll neccessary in photosynthesis?