1. world history

what is the process of ice fishing in the colonial times

2. Math

i have a question regarding statistics. i just don't know how to do it and would really appreciate if someone could tell how i can solve it. the question is; a) compute the mean and the standard deviation of the population? ive looked through all my notes

3. physics HELP

a 18.0kg sled being pulled across horizontal surface at constant velocity. pulling force has magnitude of 82.0N and is directed at angle of 30 degree above horizontal. determine coefficient of kinetic friction

4. physics

a rocket of mass of 450000kg is in flight. its thrust is directed at angle of 62.5 degree above horizantal n has magnitude of 6000000 N. find the magnitude and direction of rockets acceleration. give direction as an angle above horizontal

5. statistics

what is random sampling and why is it important to statistical inference with reference to representativeness and error?

6. statistics

what is sampling distribution and sampling distribution of means?

7. statistics

what is meant by the standard error of a statistic? what is it an index of? what is meant by the standard error of the mean? what it is an index of?

10. Limiting reagent

If 270. mL of 0.08089 M aqueous Pb(NO3)2 and 710. mL of 0.05493 M aqueous Na+ are reacted stoichiometrically according to the equation, what mass (g) of Na+ remained? Pb(NO3)2(aq) + 2 NaI(aq) → PbI2(s) + 2 NaNO3(aq)

11. chemistry

If 0.0490 mol of solid CaCO3 and 380 mL of 0.135 M aqueous H2SO4 are reacted, what volume (L) of gaseous CO2 measured at 1.1 atm pressure and 301 K is produced. H2SO4(aq) + CaCO3(s) → CO2(g) + CaSO4(s) + H2O(l)

12. AP Physics

A basketball player makes a jump shot. The 0.700-kg ball is released at a height of 2.00 m above the floor with a speed of 7.70 m/s. The ball goes through the net 3.00 m above the floor at a speed of 3.10 m/s. What is the work done on the ball by air

13. college

I have to write a "journal article reviews" for Medical Law & Ethics. I have some articles already but don't know how to start it. thanks

14. physics Helppp

3 mass are collienear formation A, B, C massA is 363 kg and is .5m away from mass B (517 kg)and mass B is .25m away from mass C (154kg) Find the magnitude and direction of the net gravitational force acting on each of the three particles (let the direction

15. physic

The drawing (not to scale) shows one alignment of the sun, earth, and moon. The gravitational force SM that the sun exerts on the moon is perpendicular to the force EM that the earth exerts on the moon. The masses are: mass of sun = 1.99 1030 kg, mass of

16. physics asap

Two fan carts with different fan speeds and different accelerations are started from rest some distance from one another. Cart A begins at position 0 with a velocity of zero and an acceleration of aA to the right. Cart B begins at position xB with a

17. physics

A 200 g ball is lifted upward on a string. It goes from rest to a speed of 2.0 m/s in a distance of 1.0 m. What is the tension in the string?

18. statistics

proportion between 45 and 78

19. Math

Using the digits 0, 2,3 ,4 5, 6 make the largest 4 digit in terms of value that you can.

20. physics

a 82.7 kg ice skater is moving at 5.88 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. she then moves in a circle of radius 0.627 m around the pole. the acceleration of gravity is 9.8 m/s^2. Find the force exerted

21. physics

an amusement park ride consists of a rotating circular platform 7.4 m in diameter from which 10 kg seats are suspended at the end of 1.81 m massless chains. when the system rotates, the chains make an angle of 26.6 degree with the vertical. the

22. Math

A father's age is 3 times his son's age. Sum of their ages is 44 years. Find their ages.

23. physics

a race car travels 22 m/s around a circular track of radius 142 m/ what is magnitude of the resultant force on the 1400 kg driver answer his car? answer in units of kN. the angle from the wheel to the horizontal is 32 degree..and u= .11

24. Chemistry

John has 300 mL of 0.65 M NaCl solution. Mary has 500 mL of 0.35 M solution. What is the concentration of the solution if they pour them together

25. Physics

A 3.5 kg body accelerates from rest to 20 m/s in 5 s. Calculate: A its acceleration B the force required.

26. physic

The acceleration due to gravity of mars is 3.7 m/s2. An astronautto throw a tennis ball 70 m upward on mars. How high will he able to throw it on the earth?

27. acid and base titrations

25.00 mL of a solution of HCL was titrated with 0.4500 M NaOH using the indicator bromthymol blue. Successice readings of the burette gave the following data: colour: Volume of NaOH (mL)= i.) 16.35 yellow ii.) 16.40 yellow iii.) 16.45 green iv.) 16.50 blue

28. acid and base titrations

Which of the following solutions should be used when titrating a 25.00mL sample of CH3COOH that is approximately 0.1 M? a.) 0.150 M NaOH b.) 0.001 M NaOH c.) 3.00 M NaOH d.) 6.00 M NaOH

29. science

i want help for krutisanshodhan

30. Phisycs

Lake Point Tower in Chicago is the tallest apartment building in the United States (although not the tallest building in which there are apartments).Suppose you take the elevator from street level to the roof of the building.The elevator moves almost the

31. EDU310

specific cases and laws that have evolved or have had an impact on U.S education

32. math

Assume that water lilies double in area every 24 hours. In the spring, there is one water lily on a lake. After thirty days, the lake is completely (100%) covered with water lilies. How many days did it take for lilies to cover 25% of the lake?

33. math

If you pour 500,000 cubic centimeters of water in a barrel that was already holding 300 liters of water, how much total water would be in the barrel?

36. physics

A firetruck is traveling at a velocity of +20 m/s in the x direction. As the truck passes x=63m it shoots a tennis ball backwards with a speed of 20 m/s relative to the truck at an angle of 39° from a height of 1.4 m. Neglect air resistance. At what x

37. physics

a piece pf ice floats in water.what will happen to the water level when the ice melts completely?

38. physics

a steel rod when measured with a zinc scale both being at 25 degree Celsius appear to be one meter long.if the zinc scale is correct at 0 degree Celsius, what is the actual length of the rod at 0 degree Celsius? [linear expansivity of steel=12*10^-6

39. algebra

(6*5)/3 is this a true sentence

40. English, Scarlet Letter

Heya, i am supposed to come up with a thesis for my scarlet letter essay that i am doing for my higher level english class, and i want to do it one the hypocrisy and how the church and the religious authority and beliefs characterize it throughout the

42. math

Sandra has 8 coins that equal 87 cents what coins does she have

44. Chemistry

What is the ionic equations for the following metals and aqueous substances? With the same equation what is being oxidize and what is being reduced? Zn + AgNO3 Zn + CuSO4 Zn + PbNO3 Mg + AgNO3 Mg + CuSO4 Mg + PbNO3 Cu + AgNO3

45. economics

Suppose the USA and Canada are considering to trade. Assume there are only two goods in the economy: wheat and corn. The table below illustrates what each country can produce in a given year. Wheat Corn USA 4 2 Canada 5 8 In this case, which country should

46. geometry

what is the answer to this; Alvan said that if 2 triangles are not congruent, then at least one of the 3 sides of one triangle is not congruent to the corresponding side of the other triangle. do you agree with alvan? justify your answer.

47. Physics

find the deceleration of a cyclist reduces from 2.5m/s to 1.0 m/s in 12s?

We have to find the synonym of the word in bold. I have a few choices but I'm stuck between two.. The words in bold are incumbent upon the phrase reads: incumbent upon all officials Deciding to choose between a) the duty of b) the term of office of

49. organic chemistry

Propose a mechanism for the acid catalyzed dehydration of 1,1-dimethyl propanal

50. Chemistry

There's Fe+3 + SCN- FeSCN+2 + heat then we add heat to it. Which way is it going to shift?

51. miccoeconomics

you are a painter, and the price of a gallon of paint increases from $3.00 a gallon to$3.50 a gallon. your usage of paint drops from 35 gallons a month to 20 gallons a month. perform the following. compute the price elasticity of demand for paint and show

90. economics

What is the significance of this and what are the consquences. I don't understand the world of economics. Maybe a little help to get started. Thank you. Canacol Energy, an oil firm listed in Toronto and Bogota has a goal to increase its output to 35,000

91. Physics

For a certain transverse wave, the distance between two successive crests is 3.11 m, and 5 crests pass a given point along the direction of travel every 12.16 s. Calculate the wave speed.

92. Precalculus

The volume V(t) of air (in cubic inches) in an adult's lungs t seconds after exhaling is approximately. (Do not use mixed numbers in your answer.) V(t)= 53+28.5sin(pie(t)/2-pie/2) (a) Find the maximum and minimum amount of air in the lungs. Maximum is

93. Precalculus

1.Simplify the expression (sin x+cos x)^2 - sin2x 2.Determine the period, amplitude, and phase shift of f(x) = 2/3sin(4x+pie) Is the amplitude: 2/3, period: 2pie/4 phase shift: -pie/4

94. physics urgent helppp!!!

A rocket of mass 4.50 105 kg is in flight. its thrust is directed at an angle of 49.0° above the horizontal and has a magnitude of 6.00 106 N. Find the magnitude and direction of the rockets acceleration. Give the direction as an angle above the

95. Math

A 384-m wire is cut into three pieces. The second piece is 3 m longer than the first. The third is four-fifths as long as the first. How long is each piece?

96. algebra

A 384-m wire is cut into three pieces. The second piece is 3 m longer than the first. The third is four-fifths as long as the first. How long is each piece?

97. geology

2 trees grew near one another and have the same growth succession but one is larger than the other. The rate of growth of a tree is based on moisture, sunlight, temperature, and nutritious soil. Which of the four factors above is the reason for the

98. Spanish

Cuándo se pone ustede el abrigo? What does this mean: is it "when do you put your coat on?" Then how am I supposed to answer? the question doesn't really make sense.

99. English 12

Yesterday, i posted a question about writing a thesis for Life of Pi. However i'm not sure how to develop a thesis from my topic. The topic of my essay is "Yann Martel's depiction on the role of setting in India and Canada". If anyone can kindly help me to

100. Chemistry Help!!!

What is the maximum number of electrons that can have n=4, mi= -1 in an atom? Also, explain how you got that answer. I am confused.

the charges for a phone call are $.52 for first min. and$.35 for each additional min. A)graph this step function for 6 minutes.Let x represent time, and f(x) the charge B) for the domain 0

102. physics

What provides the force when a car makes a turn? (This is dealing with centripetal force)

103. English

Can you please check these sentences for me, please? I rephrased the beginning of "The talented Mr Ripley". 1)The scene is set at the seaside on a small motor boat. Dickie, the son of a millionaire, is excited at the idea of going for a ride offshore. 2)

104. Chemistry Help

Have the electrons been added to this diagram from lowest to highest energy states? Yes or No? Why? This is an orbital diagram: I don't have arrows so, < means up > means down

105. geology

How old are the oldest meteorites yet studied and what is the minimum age of Earth since Earth is at least as old as the meteorites. We know the oldest meteorites contain equal amounts of uranium 238 and lead 206. Uranium 238 has a half life of 4.5 billion

106. Math

Suppose human activity has caused a 0.1 Fahrenheit increase in global temperatures so far, and that this sift will grow exponentially with a doubling time of 10 years. a. How much will temperatures have risen 50 years from now? b. A politician suggests

Which of the following confirms that gravitational mass and inertial mass are equal? 1.Free-fall accleration is the same throughout the universe 2.Free fall acceleration is the same at all points where the gravitational field stength is the same 3.Newton's

108. algebra2

y varies directly as the square of x. When x = 2, y = 40. Find x when y = 640.

109. chem

write a balanced equation for:Gaseous carbon dioxide and liquid water react to produce aqueous glucose (C6H12O6) and oxygen gas. I try but everytime i change the coefficient it makes the other elements unbalanced. the starting formula i got was: CO2(g) +

110. algebra2

What is the standard form equation of the line passing through (–2, 8) with a slope of 2?

111. algebra2

What is the equation of the line passing through (0, 2) and perpendicular to the line y = 4x – 3 in slope-intercept form?

112. algebra2

What is the equation of the line passing through (1, 7) and parallel to the line y = –x + 5 in standard form?

113. algebra2

To which graph does the point (–1, 3) belong?

114. algebra2

What is the vertex of the graph of y = |–x + 4| + 1?

115. algebra2

Solve P = 2w + h for h.

116. algebra2

What is the equation of a vertical line passing through the point (3, –5)?

117. algebra2

Solve x – 2y = 4 for y.

118. algebra2

What is the solution set for |–2x + 16| – 9 = –3

119. algebra2

What is the equation in point-slope form of the line passing through (0, 5) and (–2, 11)?

120. Physics

A microphone has an area of 3.8 cm2. It receives during a 2.87 s time period a sound energy of 4.2x10-11 J. What is the intensity of the sound?

121. algebra2

What are the solution intervals for |2x – 1| + 6 > 9?

122. algebra2

On the graph of the equation 8x – 3y = 24, what is the value of the y-intercept?

123. algebra2

y varies jointly with p and q. When p = 12 and q = 4, y = 144. Find y when p = 10 and q = 6.

124. algebra2

What is the slope of the line that passes through (2, 12) and (4, 20)?

125. Origami Sites

Hi. I can't find any origami sites to make easy Christmas presents. Can anyone help me! Thanks, Erin

126. Research

Sociological research can be a difficult procedure what are some of the problems or concerns that need to be dealt with?

127. Chemistry Help

The orbital diagram shown here has some mistakes in it. Indicate which of the following rules and principles were not observed when this diagram was constructed. Select all that apply. 1. aufbau principle 2. Pauli exclusion principle 3. Hund's rule This is

128. Physics

If I'm driving a car and I make a turn to the right, what will happen to a bag of items that is sitting next to me in the car-in terms of inertia, friction and centripetal force I think they will fall the opposite direction but why?

129. algebra 2

how do u do synthetic division with the problem: (x^5-7x^3+x+1)/ x+3

130. Economics help

Article dealing with monopoly power, either regulated or illegal attempts at monopolization.

131. History

Excuse me, but I need help in finding what Thomas Jefferson and Benjamin Franklin did to help the American Revolutionary War. Please, Lilly Social Studies P.S. Thank you.

132. Fine Art

28. Describe some of the different features architects used in the Colosseum that made it so unique. I need help answering this. Thanks! -MC

133. COLLEGE

an you please tell me if this passage is correct? I am looking for 20 grammatical errors, comma(six); capitalization(six); question marks,apostrophes, and quotation marks(five); colons,semi-colon and common misused words(three) Why are great numbers of

134. poetry

What's the paraphrasing of "If you can bear to hear the truth you've spoken Twisted by knaves to make a trap for fools, Or watch the things you gave your life to, broken, And stoop and build 'em up with worn-out tools"

135. statistics

Assume that the mean hourly cost to operate a commercial airplane follows the normal distribution with a mean of $2,225 per hour and a standard deviation of$220. What is the operating cost for the lowest 5 percent of the airplanes?

136. physics

A crate of mass 20 kg is pushed up a frictionless ramp by a person as shown in the figure below. Calculate the work done by the person in pushing the crate a distance of 15 m as measured along the ramp. Assume the crate moves at a constant velocity.

137. grammar

Wondering if I have correctly identified each verb in the following sentences: The role of education plays (simple present) a major role in successful financial planning. My Personal Finance class is helping (progressive present) me to learn how to budget

When forces are ______ they are equal and opposite and their is ________ ___________.

139. hcr220 college

I am confused with what they are wanting me to do. It says write a 1500 to 1750 word essay in which you discuss implications of both forms of the patient's diseases, HIV and AIDS, from the perspective of HIPAA confidentiality. I am confused on what

140. Chemistry

How many grams of ice at -26.5\, ^\circ C can be completely converted to liquid at 15.0\, ^\circ C if the available heat for this process is 4.50×103 kJ? For ice, use a specific heat of 2.01J/(g\cdot{ ^\circ C}) and H2 = 6.01 kJ/mol.

141. Chemistry

Please let me know how you would approach the gas law problem. Here goes: If the pressure exerted on the gas in a weather ballon decreases from 1.01 atm to 0.562 atm as it rises. By what factor will the volume of the gas in the ballon increase as it rises?

142. Reimbursement Methodologies

List some of the risk areas that can be identified through the auditing process.

143. physics

Set a frictionless incline at various measured angles then determine the acceleration of a block by measuring the time it takes to increase from an initial speed to a final speed.If the angle is 20 and the initial speed is 0.68m/s and final speed is

You are a technical writer in a large company who is working on a training manual to help new users learn the company's computer system. Employees will use your manual in training seminars taught by your company's trainers. The manual will also serve as an

145. Reimbursement Methodologies

You work in a physicians office performing billing. You notice that the guidelines haven't been followed accurately in completing the claim form. What will happen if you don't correct the claim form ?

146. Math

What is the most precise name for each space figure that has the given properties. 1. four lateral faces that are triangles? 2. three lateral faces that are rectangles? 3.a lateral surface and one circular base?

147. Reimbursement Methodologies

Mary was recieving Medicaid in Texas. When she moves to California can Mary assume that she will receive the same coverage there ?

148. PHYSICS

What is the reaction effect of the following action effects? a) Earth orbits the sun b) Ball accelerates downward Thank YOu.

149. computer programming

Write a program that simulates the dial of a phone number. The program will input a phone number and the program will acknowledge the call by either writing an error message or the 8 digit phone number to the console window. The phone number may have

150. Physics - Springs

a 10.0 g bullet is fired into a 1.0 kg block initially at rest on a rough surface and connected to a spring with k = 200 N/m. Immediately following the collision the block has a speed of 2.0 m/s. The coefficient of friction between the ground and the block

151. Physics

An airplane flies due north at 160 km/h with respect to the air. There is a wind blowing at 80 km/h to the east relative to the ground. What is the plane's speed relative to the ground?

152. physics

what impulse is needed to stop a 45 g mass traveling at 42 m/s?

153. Physics

A 50.0g Bullet traveling horizontally at 200.0 m/s embeds itself in a much more massive wooden block initially at rest on a horizontal surface (μ=0.10) The block then slides 1.2m toward an ideal spring and collides with it. The block compresses the spring

154. Physics

I have no idea how to do this.

155. physics

A 70 kg man jumps 1.00m down onto a concrete walkway. His downward motion stops in .02 seconds. If he forgets to bend his knees, what force is transmitted to his leg bones?

156. UOP

The final project for HSM 240 is a 1,750- to 2,100-word proposal paper on a social program that you create. Pretend that you have the power and capacity to create an agency or organization and decide to create a new social program. You need funding and

157. Reimbursement Methodologies

Explain why the lack of Universal Health Care Coverage can raise health care costs. Thank you Ms. Sue for your previous help....

How do you do radical expressions? Square root of 72. Cube root of 54. Fourth root of 96.

Name all the arrays you can manke with each set of tiles 8 tiles, 9 tiles, and 16 tiles

160. Physics

The motion of a particle connected to a spring is described by x=10cos(πt). At what time (in s) is the potential energy equal to the kinetic energy?

161. Math

What is the most precise name for each space figure that has the given properties. 1. four lateral faces that are triangles? 2. three lateral faces that are rectangles? 3.a lateral surface and one circular base?

Which of the following confirms that gravitational mass and inertial mass are equal? I posted this about three hours ago and no one answered it so I'm hoping someone can look at my answer and direct me 1.Free-fall accleration is the same throughout the

175. chem repost

write a balanced equation for:Gaseous carbon dioxide and liquid water react to produce aqueous glucose (C6H12O6) and oxygen gas. I try but everytime i change the coefficient it makes the other elements unbalanced. the starting formula i got was: CO2(g) +

176. physics

Graphically solve for the WORK done if F= 40N @ 30 degrees and d= 12 @ 0 degrees.

177. Chemistry

Sodium oxide, reacts with water to give NaOH. A) Write a balance equation? B)What is the pH of the solution prepared by allowing 1.55 g of Na2O to react with 500.0 ml of water? (assume there is no volume change) C) How many milliliters of 0.0100M HCL are

178. physics

a 60 kilogram student sitting on a hardwood floor accelerates at 1.3 meters per second squared when pulled by a 240 newton horizontal force. what is the coefficient of friction between the student and the floor?

179. Physics

A microphone has an area of 3.8 cm2. It receives during a 2.87 s time period a sound energy of 4.2x10-11 J. What is the intensity of the sound?

180. psychology

habitually listening to loud music through headphones can result in loss of hearing in what part of the ear?

215. college

Explain how the U.S. became involved in the politics of Southeast Asia

216. Algebra

how would I find the domain and range without a graph for this : x^2 - 1

217. MATH

what would be the space figure of a shoe box?

218. science

geologists determine a rocks relative age and....?

219. College physics

A toddler is on a playground swing. When she is right in the middle going forward (to the right), then ... a).her tangential acceleration is maximal to the right. b) her tangential acceleration is zero. c) her tangential acceleration is maximal to the

220. Physics

A radioactive nucleus at rest decays into a second nucleus, an electron, and a neutrino. The electron and neutrino are emitted at right angles and have momenta of 9.80 10-23 kg·m/s, and 5.80 10-23 kg·m/s, respectively. What is the magnitude and direction

221. Chem 1010

What will happen to 42 g of KCl solution per 100 g of water when cooled from 60 degrees Celsius to 0 degrees Celsius?

222. Calculus 1 Implicit differentiation

Help please help me understand what i am doing wrong in this problem! x^3+3x^2y+y^3=8 find dy/dx using implict differentiation. The answer is x^2+2xy -------- but i keep getting x^2y x^2+y^2 ----- x^2+y^2

223. Algebra

Another question about domains and range how would I find the range of (3x-4)/(6x-1) ? Without using a graph the domain is x can't be 1/6 What is the range?

224. MATH

Would a lateral surface and once circular base be a cone?

225. Calculus 1 Related Rates

Water is discharged from a pipeline at a velocity v(in ft/sec) given by v=1240p^(1/2), where p is the pressure (in psi). I f the water pressure is changing at a rate of 0.406 psi/sec, find the acceleration(dv/dt) of the water when p=33.0 psi. I know the

226. chemistry

How many moles of H2 are in a beaker of 60ml of 2HCL?

227. algebra

How do I write the equation of a line in STANDARD FORM, when it contains (-2,1) & (1,4) ?

228. writting

this is a weird question but i need help on writting a conclusion about the color blue?

229. Physics

A bullet of mass 5.15 g is fired horizontally into a 2.74 kg wooden block at rest on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.185. The bullet comes to rest in the block, which moves 1.84 m. (a) What is the

230. social studies

what did thomas jefferson and benedict arnold have to do with the Revolutionary War?

231. finance mortgage payment

Purchase a home for $160,000. I intend to put down 20% and finance the remainder over 15 years at 6 3/8% interest. If my taxes & insurance totals$3,600 per year, how much will my total monthly payment be?

232. MATH

What is the sapce figure that has three lateral faces that are rectangulars?

233. Economics

What is the significance of this and what are the consquences. I don't understand the world of economics. Maybe a little help to get started. Thank you. Canacol Energy, an oil firm listed in Toronto and Bogota has a goal to increase its output to 35,000

234. hum 205

need help w the human experience assignment

235. Physics

A bathysphere used for deep sea exploration has a radius of 1.50 m and a mass of 1.20 × 104 kg. In order to dive, the sphere takes on mass in the form of sea water. a) Determine the mass the bathysphere must take on so that it can descend at a constant

236. MATH

What is the sapce figure that has three lateral faces that are rectangles?

237. chemistry

calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from n=5 to n=1 how do I do this?

238. english

I am going to write about Somali pirates and I need help with writing my essay. I want to start with Anecdote and I don't know how to start. I am not for Somali pirates but I just think that justice is not being servered. this is little background about

239. algebra

a commerical jet and a private plane leave the same airport at the same time traveling in opposite directions at average speeds of 880km/h and 450km/h respectively. in how many minutes will they be 1463 km apart.

240. Math

The range of 105,100,79,86,101,94,98,87, and 83 is ?

241. Algebra

How do I write the equation of the line in standard form given this info: Perpendicular to 3x - 1y = 4 with an x-intercept of 12 ? Thanks! :)

242. Physics

what is the variation of pressure in the sound wave if the sound intensity is 3.85x10^-8 W/m^2, the speed of sound is 343 m/s and the density of air is 1.2 kg/m3?

243. chem class

What is the pH of an aqueous solution at 25.0 °C that contains 3.98 × 10-9 M hydroxide ion? i posted this before and i tried solving it but i get it wrong 14 = ph + - log (3.98 × 10-9) 14- 8.4 = ph 5.6 = ph but the correct answer is 8.400 what did i do

263. Calculus

Calculate the volume of the ramp in Figure 17 in three ways by integrating the area of the cross sections: (a) Perpendicular to the x-axis (rectangles) (b) Perpendicular to the y-axis (triangles) (c) Perpendicular to the z-axis (rectangles)

264. physics

A 2.20 kg box slides down a rough incline plane from a height h of 1.39 m. The box had a speed of 2.77 m/s at the top and a speed of 2.34 m/s at the bottom. Calculate the mechanical energy lost due to friction

265. Earth Science

Lower case letters that come after the capital letter(s), e.g., KJk, labeling a rock unit represent the rock unit's _

266. Physics

Suppose that high-speed stroboscopic photographs show that the 200-g head of a golf club travels at 51 m/s just before it strikes a 50-g golf ball initially at rest on a tee. If the club head slows to at 36 m/s (in the same direction) after the collision,

267. physics

what is the variation of pressure in the sound wave if the sound intensity is 3.85x10^-8 W/m^2, the speed of sound is 343 m/s and the density of air is 1.2 kg/m3?

268. physics

A 1.0 m cubed object floats in fresh water with 20% of it above the waterline. What does the object weigh out of the water?

269. Statistics

a roulette wheel has 40 slots evenly divided between red (even) and green (odd) slots totaling 38 and a "0" and a "00". what is the probability of the ball landing in an: A)even number < 10 B) other than an even or odd number C) odd number > 15 D) even

270. math

donna runs 7 miles in 75 minutes. At the same rat, how many miles would she run in 45 minutes?

271. Compounded Interest

) An investment of $37,000 was deposited in the bank. Interest was computed on a semiannual basis and was kept there for 10 years. If the maturity value of this investment is$74,000, at what interest rate was it invested?

286. English

If the king fails to QUASH the rebel forces, they will... what could i write to finish the sentence?

287. algebra

A contagious disease is infecting residents of a town of 7,300 residents. The number of residents infected t days after the disease has begun is given by the function f(t)= 7300/1+500e-0.5t How many residents are infected with the disease after 6 days?

288. Physics

An 8.00 g bullet is fired into a 250 g block that is initially at rest at the edge of a table of 1.00 m height (Fig. P6.26). The bullet remains in the block, and after the impact the block lands 2.00 m from the bottom of the table. Determine the initial

289. Math

A wooden artifact from an ancient tomb contains 70% of the carbon-14 that is present in living trees. How long ago was the artifact made? (The half-life of carbon-14 is 5730 years. Round your answer to the nearest whole number.) And.... An infectious

290. English

With the election so near, the mayor became RETICENT about..... what could i write to finish the sentence?

291. English

Ske[tics argued that the noss's UNORTHODOX management style would...

292. Physics

Suppose a spacecraft of rest mass 34000 kg is accelerated to 0.206c. How much kinetic energy would it have? If you used the classical formula for KE, by what percentage would you be in error? Do not enter units.

293. English

Skeptics argued that the boss's UNORTHODOX management style would... im not sure how to! I know that unorthodox means disregarding or defying traditions or standards

294. finance

The banks offers a rate of 8 1/4 percent with a 20percentcompensating balance requirement, or as an alternative, 9 3/4 percent with additional fees of 5,500 to cover services the bank is providing. In either case the rate on the loan is floating ( changes

295. CHEMISTRY

For the reaction 3 O2(g) reverse reaction arrow 2 O3(g) If the equilibrium mixture is analyzed and [O2(g)] is found to be 3.77*10-2 M, what is the concentration of O3(g) in the mixture?

296. Physics

A cylinder with a valve at the bottom is filled with an ideal gas. The valve is now opened and some of the gas escapes slowly. The valve is then closed, after which the piston is observed to be at a lower position. Assume that the system is in thermal

297. physics

An alpha particle collides with an oxygen nucleus, initially at rest. The alpha particle is scattered at an angle of 60.9° above its initial direction of motion, and the oxygen nucleus recoils at an angle of 51.9° on the opposite side of that initial

298. CHEMISTRY

I am having a ton of trouble with this lab question, I do not understand it at all. The question is: Show how the rate of reaction in reciprocal seconds was calculated for the mixture in question 1, using the class average. The mixture in question one is:

299. English

How to be a good poet

300. physics

In a crash test, a truck with mass 2600 kg traveling at 24 m/s smashes head-on into a concrete wall without rebounding. The front end crumples so much that the truck is 0.66 m shorter than before. What is the average speed of the truck during the collision

301. physical science

how much work is done on a 100kg crate that is hoisted 4 m in a time of 4 seconds

302. physics

wo fan carts with different fan speeds and different accelerations are started from rest some distance from one another. Cart A begins at position 0 with a velocity of zero and an acceleration of aA to the right. Cart B begins at position xB with a

303. physical science

how much power is required to lift the crate

what is 670.8/1000000000 and then what is 3.0 * 10 to the 8th power divided by the top answer ...

305. Chemistry

Teeth and bones are composed, to a first approximation, of calcium phosphate, Ca3(PO4)2(s). The Ksp for this salt is 1.3*10^-32 at 25°C. Calculate the concentration of calcium ion in a saturated solution of Ca3(PO4)2.

306. Chemistry

How would you prepare 150.0 mL of a 0.200 M aqueous solution of potassium chloride from a 0.500 M aqueous solution of potassium chloride?

307. English

We can't use that photograph because Maria blinked while it was taken. Tell if compound or complex sentence complex

308. Math grd 12

How many different seven-digit telephone numbers are possible if no number may begin with 0?.....the answer is 9,000,000 but I'm not sure how to get that, plz explain:)

309. math

If the radius and diameter of a sphere were measured in inches, then the surface area would be measured in

310. Math grd12

How many ten-digit telephone numbers are possible if the first three digits must be different? The answer is 72,000,000,000.... I need the method to get that:)

311. Chemistry

how many moles of ozone does the atmosphere hold?

312. FP/101

Which of the following is considered an advantage of home ownership? A. You are responsible for all repairs and maintenance. B. Interest paid on the mortgage of your home is tax deductible. C. Mortgage payments are always lower than rent payments. D.

313. Math grd12

How many arrangements of five letters from the word 'certain' contain the letter 't'? Explain your reasoning.

314. Maths

My teacher divided his class into groups of 8 on Monday, 10 on Tuesday and 4 on Wednesday. What is the least possible number of children in his class?

315. algebra

Convert to a logarithmic equation: 9y = 6561

316. Physics

A ball initially at rest is dropped from a window 18.6 m off the ground. How long does it take for the ball to reach the ground? Round your answer to 2 decimal places.

317. physiscs

a 15g bullet is fired horizontally into a block of wood with mass 2.5 kg and embedded in the block, Initially the block of wood hangs vertically and the impact the bullet just before the impact.

318. physics

A catapult with a spring constant of 1.0 104 newtons per meter is required to launch an airplane from the deck of an aircraft carrier. The plane is released when it has been displaced 0.50 meter from its equilibrium position by the catapult. What is the

319. math

A parallelogram is a convex quadrilateral with four vertices and two sets of opposite parallel sides. Given 3 of the vertices of a parallelogram at A (0,0) B(2,5) and C(2,0), find all possible coordinates for D.

320. Physics

A 0.2 kg object that stretches a spring 6.5 cm from its natural length when hanging at rest oscillates with an amplitude of 1.5 cm. The acceleration of gravity is 9.81 m/s2. Find the total energy of the system.

321. math

A perpendicular bisector is a segment which is perpendicular to another segment, and specifically goes through the midpoint of the segment. Find the equation of the perpendicular bisector of in slope intercept form, given A(3,6) and B(3, 10) .

322. English

I need a short story with the theme of insanity. I'm not able to use Tell-Tale Heart by Edgar Allan Poe. It would also be nice if it were a good read. Thanks (:

323. ALGEBRA

Express as a single logarithm and simplify: log x – log (8x) + 2 log 4

324. environment chem

how many moles of ozone does the atmosphere hold?

325. math

what is the next number after 2,22,12,132,1342

326. Math

Solve log10(8 x) − log10(1 + √x) = 2 for x.

327. Comp

What is the plural possessive of brother-in-law?

328. science

You are given a six month assignment by your employer to work at a remote location in Australia. In order to pack as lightly as possible, you try to research the climate of the small town in Australia, but there is little data since no major cities are

329. Statistics/2nd post

How is the p-value of a hypothesis test related to type I and type II error?

331. physics

The force F = (3.2, -7.1) N acts on a mass of 1.15 kg. At time t = 0 s, the mass has a velocity v0 = (-0.46, 0.36) m/s. What is the angle (in degrees) of the initial velocity, measured counter-clockwise from the +x-axis? I got 38.04 degrees but isn't the

332. physics

A firetruck is traveling at a velocity of +20 m/s in the x direction. As the truck passes x=63m it shoots a tennis ball backwards with a speed of 20 m/s relative to the truck at an angle of 39° from a height of 1.4 m. Neglect air resistance. At what x

333. english 10th

what is a metaphor and hyperbole for the book the Bar Code Rebllion

334. algebra

Two angles are complementary if the sum of their measures is 90°. The measure of the first angle is 5° less than 4 times the second angle. Put the measure of the FIRST angle in Blank 1 and the measure of the SECOND angle in Blank 2. Just write the

335. Algebra

If the sides perpendicular to the wall have length x feet, which of the following (A, B, C, or D) represents the area A of the garden? A(x) = –2x2 + 30x A(x) = –2x2 + 60x A(x) = x2 – 60x A(x) = 2x2 – 60x

336. Physics-Linear momentum

A block of mass m = 2.60 kg slides down a 30.0° incline which is 3.60 m high. At the bottom, it strikes a block of mass M = 6.80 kg which is at rest on a horizontal surface, Fig. 7-46. (Assume a smooth transition at the bottom of the incline, an elastic

337. science

A mineral can scratch any mineral harder than itself. True or False? I said it is false. My Mom told me I am wrong, it is true!! Can you tell me who is correct?

338. HUM176

briefly describe the evolution of movies, television, Internet, books and magazines, and media companies throughout the last century.

339. physics

c) The rocket is launched a third time with the same initial velocity as before at an angle of 45 degrees. This time we want to launch the rocket so that it goes through a field goal post at a height of 7.9 meters in the air. Calculate the time the rocket

340. physics

Solve for v1. O.500km/v1+3.50km/2v1=0.250h

341. psy

Father: Information collected on elementary school children have indicated that for the most part, the more cavities children have, the better they are at math. Since I want my daughter to improve her math skills, I now make sure she eats candy with every

342. Physics

A cylinder with a valve at the bottom is filled with an ideal gas. The valve is now opened and some of the gas escapes slowly. The valve is then closed, after which the piston is observed to be at a lower position. Assume that the system is in thermal

343. Math grd 12

You are setting a system programing codes for a universal TV remote control. Each code will have five digits and cannot include a 0 or repeat any digits. How many codes a)do not contain a 7? b)have 3 as the third digit, and 5 as the fifth digit c)begin

344. physics

the average speed of light slows to .75 c when it refracts through a particular peice of plastic. a) What change is there in the light's frequency in the plastic? b) It's wavelength?

345. Math

Write the following fractions in increasing order: 45/44, 5/4, 12/11

346. Research help/cont

Sociological Research can be a difficult procedure what are some of the problems or concern that need to be dealt with.. Was assisted with this earlier, but unfortunately the links provided were of no assistance.

347. Math grd 12

In how many ways can you make Rhe border if it requires 15 titles and you use only blue and white ones? Explain your reasoning. The final answer is 8008.

348. Algebra

A gardener has 60 feet of fencing with which to enclose a garden adjacent to a long existing wall. The gardener will use the wall for one side and the available fencing for the remaining three sides. (a) If the sides perpendicular to the wall have length x

349. math

A=P(1+nr); find r

350. science

I am re-submitting my question because I did not receive any help yet! True or false. A mineral can scratch any mineral harder than itself. I put down false BUT my Mom said it is true. Who is correct?

351. Math grd12

Gisela lives in a subdivision where the streets are laid out in a grid pattern. Her school is eight blocks south and six blocks east of her home. How many different direct routes could she take when she bicycles to school if she always stops by her