# Questions Asked onSeptember 13, 2010

1. ## PHY

Two snowcats tow a housing unit to a new location at McMurdo Base, Antarctica, as shown in Figure 4-46. The sum of the forces A and B exerted on the unit by the horizontal cables is parallel to the line L, and FA = 4300 N. Determine FB and the magnitude of

2. ## MATH

WRITE EACH ADDITION VERTICALLY. DECIDE WHICH NEW GROUPS YOU WILL MAKE. THEN, ADD TO SEE IF YOU WERE CORRECT.

3. ## chemistry

Write formulas for the compounds that form from {\rm Rb} and each of the following polyatomic ion: {\rm NO}_{3}^{-}, {\rm SO}_{4}^{2-}, {\rm PO}_{4}^{3-}.

4. ## physics

If a car rolls gently(vo=0) off a vertical cliff, how long does it take to reach 85km/h?

5. ## physics

A wood block, after being given a starting push, slides down a wood ramp at a constant speed. What is the angle of the ramp above horizontal? The fact that there aren't any numbers involved here and a certain angle is required confuses me. I know it

6. ## chemistry

A solution is made at room temperature containing 90 g of NaCl and 200 g of water. It is brought to a temperature of 50°C. What are you most likely to see? (Select all that apply.) A. a solution with a few crystals at the bottom B. all the solid dissolve

7. ## physics

A child's toy consists of a piece of plastic attached to a spring, as shown below. The spring is compressed against the floor a distance 1.8 cm and released. If the spring constant is 107 N/m, what is the magnitude of the spring force acting on the toy at

8. ## Chemistry

I need help setting up this problem: Ethylene glycol has a specific gravity of 1.1088 at room temperature, What is the volume of 1.00 kg of ethylene glycol? What is the volume of 2.00 lb of ethylene glycol? Using 25 degrees Celsius.

9. ## chemistry

the mole fraction of urea (molar mass = 60g/mole) in a solution prepared by dissolving 16g of urea in 39g of h2o

10. ## math

A roulette wheel has 18 red slots and 18 black slots numbered alternately with the numbers 1 through 36. Two green slots are numbered 0 and 00. The winning number is determined by the slot into which a single marble rolls. Players are not allowed to bet on

11. ## Physics Gauss

A long, thin straight wire with linear charge density -λ runs down the center of a thin, hollow metal cylinder of radius R. The cylinder has a net linear charge density 2λ. Assume λ is positive. Find expressions for the electric field at the following

12. ## Chemistry

Alicia's cheapskate boyfriend gave her a ring he claims is 24 carat gold. Alicia is skeptical. After chem class the next day she measures the mass of the ring, finds the volume of the ring by water displacement, and then calculates the density of the ring.

13. ## statistics

Scores on a certain test are normally distributed with a variance of 14. A researcher wishes to estimate the mean score achieved by all adults on the test. Find the sample size needed to assure with 95% confidence that the sample mean will not differ from

14. ## statistics

In a survey of 5100 TV viewers, 40% said they watch network news programs. Find the margin of error for this survey if we want 95% confidence in our estimate of the percent of TV viewers who watch network news programs. Hint, find the CI using 1-PropZInt,

15. ## physics

a basketball player can leap upward 0.5m. what is his initial velocity at the start of the leap?

16. ## 9 th science

distinguish between tolerance range and optimal range

17. ## physics 1

In coming to a stop a car leaves skid marks 92m long on the highway. Assuming a decceleration of 7.00m/s^2, estimate the speed of the car just before braking.

18. ## physics

A fisherman's scale stretches 3.9 cm when a 2.8 kg fish hangs from it. (a) What is the spring stiffness constant? N/m (b) What will be the amplitude and frequency of vibration if the fish is pulled down 2.7 cm more and released so that it vibrates up and

19. ## health

Identify at least five indicators of project failure that manifest themselves in this case study. Are these right ? these are a few i have came up with: organized inertia lack of clarity of pupose lack of landor project status report insufficient

20. ## Biochem

HEPES, is a commonly used component of physiological buffers. The PKa of the protonated amino group of HEPES is 7.55 at 25C. Describe the preparation of 1.00L of 0.100M HEPES buffer, pH 8.00, from the sodium salt of the basic form of HEPES (MW 260.3), .0M

21. ## Physics

A hockey puck sliding on a frozen lake comes to rest after traveling 160 m. If its initial velocity is 2.3 m/s, what is its acceleration (assumed constant)? Answer in units of m/s2.

22. ## physics

A helicopter is rising at 5.1 m/s when a bag of its cargo is dropped. (Assume that the positive direction is upward.) (a) After 2.0 s, what is the bag's velocity? (b) How far has the bag fallen? (c) How far below the helicopter is the bag?

What is the unscrambled fruit or vegetable with the letters bekrechuryl?

24. ## Physics

A man lifts a 2.0 kg stone vertically with his hand at a constant upward velocity of 1.5 m/s. What is the magnitude of te total force of the stone on the man's hand?

25. ## physics 2

A thin nonconducting rod is bent to form a semi-circle of radius R. A charge Q is uniformly distributed along the upper half and a charge -Q is uniformly distributed along the lower half, as shown int he sketch at the right.find E vector at P, the center

26. ## math

write each addition vertically.decide which new groups you will make.then,add to see if you were correct. 256+1273___________ a new ten?____________ a new hundred?_________ a new thousand?____________ need answers and please explain

27. ## geometry

point G is the midpoint of EF EG= 4x+12 and EF= 2x+30. How do i find GF?

28. ## chemistry - vapor pressure

the vapor pressure of pure water at 25C is 23.8 torr. determine the vapor pressure (torr) of water at 25 C above a solution prepared by dissolving 35g of urea (a nonvolatile, non-electrolyte, MW = 60.0G/MOL) IN 76G of water. answer:21 i just want to know

29. ## physics

An object is shot from the back of a railroad flatcar moving at 40 km/h on a straight horizontal road. The launcher is aimed upward, perpendicular to the bed of the flatcar. The object falls: a) in front of the flatcar b) behind the flatcar c) on the truck

30. ## Physics

A rocket is fired vertically with an upward acceleration of 30 m/s2. After 20 s, the engine shuts off and the rocket then continues rising (while in free-fall). The rocket eventually stops rising and then falls back to the ground. (a) What is the highest

31. ## hcs 577

Why are charges not reported as revenue for health care organizations?

32. ## molal

the freezing point of ethanol (C2H5OH) is -114.6C. the molal freezing point depression constant for ethanol is 2.00C/m. what is the freezing point (C) of a solution prepared by dissolving 50.0 g of glycerin (C3H8O3, A nonelectrolyte) in 200 g of ethanol.

33. ## College Physics

A particle experiences a constant acceleration that is north at 100 m/s^2. At t=0, its velocity vector is 60 m/s east. At what time will the magnitude of the velocity be 100 m/s?

35. ## Physics

a ball is thrown up onto a roof, landing 4.70 s later at height h = 24.0 m above the release level. The ball's path just before landing is angled at  = 62.0° with the roof. (a) Find the horizontal distance d it travels. (Hint: One way is to reverse the

36. ## physics

if you jump upward with a speed of 2mls, how long will it take before you stop rising?

37. ## Science-Chemistry

Analysis questions: A) What evidence is there that the gas bubbles formed in the first part of the investigation were hydrogen gas? Answer: Evidence there was that proved that the gas bubbles formed in the first part of the investigation were hydrogen gas

38. ## English 2

12. In "Two Kinds", what motivated Jing-mei to keep silent about her performance at the piano recital, never discussing the recital with her mother? a. She fears her mother feels betrayed by her failure b. She thinks her mother will become angry if she

39. ## Physics

A cat rides a merry-go-round turning with uniform circular motion. At time t1 = 2.00 s, the cat's velocity is (3.00 m/s) + (2.70 m/s) , measured on a horizontal xy coordinate system. At t2 = 5.90 s, its velocity is (-3.00 m/s) + (-2.70) . What are (a) the

40. ## chem

How much water would be needed to completely dissolve 1.64 L of the gas at a pressure of 750 torr and a temperature of 21 C? Henrys law constant is .145 M/atm.

41. ## statistics

For this problem, assume the balls in the box are numbered 1 through 9, and that an experiment consists of randomly selecting 3 balls one after another without replacement. What probability should be assigned to the event that at least one ball has an odd

42. ## math

how do you convert .83 to a fraction

43. ## Math

What is the pattern for 3, 19, 99, 499, 2499

44. ## chemistry

A solution of sodium nitrate, NaNO3, in 200 g of water is saturated at 50°C. If the solution is cooled to 20°C, how many grams of sodium nitrate will precipitate from the solution?

45. ## spanish

please check my homework. 1. Yo__estoy___ en mi casa (in my house). 2. Jose, María, y yo _____estoy____ alegres. 3. Mario, tú, y yo ____estoy______ en el cine (at the movies). 4. El perro ___estamos_____ en el parque (at the park.) 5. Usted ____esta_____

46. ## trig

Sitting in your sailboat, you see a lighthouse 500 feet away. Looking up at a 20°angle, you see the light at the top of the lighthouse. How far off the ground is the light in the lighthouse? Round your answer to the nearest tenth.

47. ## physics

Two cars both start from rest and have the same constant acceleration. When radar is used to measure the velocity of each car, car A is found to be moving twice as fast as car B. At the instant the radar is used, car A has a displacement that is ______

95. ## Physics

A car is driven east for a distance of 46 km, then north for 27 km, and then in a direction 35° east of north for 24 km. Determine the angle (from east) of the car's total displacement measured from its starting direction.

96. ## maths

perform the indicated operation and simplify 1/16+3/32

97. ## Physics

Kyle is flying a helicopter and it is rising at 6.0 m/s when he releases a bag. After 2.0 s (a) what is the bag's velocity? -13.6 m/s (b) how far has the bag fallen? (c) how far below the helicopter is the bag?

98. ## Math

Explain how you would use a number line to round 148 to the nearest ten.

99. ## chem "help"

What is the ratio of the activities of Zn 2+ and Pb 2+ in a solution that is in equilibrium with respect to sphalerite and galena?disregard hydrolysis effect

100. ## Statistics

An educator wants to estimate the proportion of school children in Boston who are living with only one parent. Since their report is to be published, they want a reasonably accurate estimate. However, since their funding is limited, they do not want to

101. ## SCIENECE!!

A car going at 30 m/s undergoes acceleration of 2 m/s^2 for 4 sec. How far did it travel while it was accelerating?? Plz help thx

102. ## math

If 5/17 of a region is shaded, what fraction is not shaded?

103. ## Science (Nutrition)

Which hormone signals the pancreas to secrete bicarbonate into the small intestine? Which hormone tells the pancreas to secrete pancreatic lipases, proteases, and amylases into the small intestine?

104. ## geometry

1) In a regular polygon the difference between the interior angles of a (n-1)sided polygon & (n+1)sided polygon is 9. find n? 2) In a regular polygon the difference between the exterior angles of a (n-1)sided polygon & (n+2)sided polygon is 6. find n?

105. ## calculus

Find all possible radii of circle centered at (3,6) so that the circle intersects only one axis

106. ## Math - asymptotes

Identify all asymptotes. 1. y= 1 / 2-√x^2 - 3x the asymptotes I got were: vertical: 1 & 4 horizontal: 0 Is this it or are there more? 2. y= x^3-2x / x^2 + 1 I believe there are no asymptotes? Is this correct?

107. ## Child Psychology

By the age of ___,a child's perceptual map for phonetic discrimination is A. one month B. six months C. one year D. five years

108. ## statistics

A hotel installs smoke detectors with adjustable sensitivity in all public guest rooms. (a) State the null and alternative hypotheses. (b) Define Type I and II error. What are the consequences of each? (c) Which is more to be feared, and by whom? (d) If

109. ## latin

WHAT DOES SILVAS CLARAS INSULAE MAGNAE SPECTATIS MEAN IN ENGLISH?

110. ## statistics

Use Excel to find the p-value for each test statistic.a. Right-tailed test, t = +1.677, n = 13 b. Left-tailed test, t = −2.107, n = 5 c. Two-tailed test,t = −1.865, n = 34

solve (24e)^1/3 / (3e)^1/3

how can you change a one dollar bill into exactly 50 coins, using at least one penny, one nickel, one dime and one quarter please?

113. ## physics

Two parallel plates, separated by 10 mm, are charged to a potential difference of 50 V (that is, one plate is 0 V and the other plate is 50 V). Which of the following statements are true? the electric potential at the midpoint between the plates is 50 V

114. ## Chemistry

Which metals are good conductors of electricity? I only need like 3. This is what I have: -Copper, Gold, and Silver. Is that good?

115. ## hcs 577

5. Do health care organizations typically get paid based on their established charges? If not, explain how they do get paid.

Translate the phrase into an expression The product of 6 and a number y how would i write that?

117. ## physics

PLEASE HELP !!!!!!Find the acceleration reached by each of the two objects shown in figure below if the coefficient of kinetic friction between the 7.00 kg object and the plane is 0.250. img411.imageshack.us/img411/5841/p449.gif I keep getting 3.9=a

118. ## Math

Please help!! We can determine the time it would take an object to fall (if there were no air resistance) by using the formula where d is the distance.t=1/4sq.root of d, d being the distance 1. We can determine the time it would take an object to fall (if

119. ## 9th Grade Algebra 1

I need someone to tell me how to do these kinds of problems (In great detail please) -5x=9-2x -8x-10=4x+14

120. ## physics

In preparing to shoot an arrow, an archer pulls a bowstring back 0.43 m by exerting a force that increases uniformly from 0 to 268 N. What is the equivalent spring constant of the bow? N/m

121. ## Geography

What is the largest river that empties into the Pacific Ocean?

122. ## Physics Flux

The electric flux through the surface shown in Figure Ex27.10 is 15.0 Nm2/C, and the electric field makes an angle á = 70° with the surface. What is the electric field strength? The surface is a 10cm by 10cm square.

123. ## Psych

Can someone please give me an example that illustrates how one's cognitive processes can shape some aspect of personality. thank you?

124. ## english

How do I teach my first grader the parts of a sentence. She gets the subject confused with predicate. She had a test and she was given a 33F. I want her to succeed in school. She scored 100 in her reading and math. Please help me!

125. ## scinece

In the United States, rank order the users of energy from smallest to biggest: Smallest Biggest a) industry home transportation b) transportation industry homes c) homes industry transportation d) homes transportation industry e) transportation homes

126. ## health

Case Study â€“ Memorial Health System CPOE Implementation Identify at least five indicators of project failure that manifest themselves in this case study. 2. For each of those indicators, describe what you might have done differently to eliminate or

127. ## Chemistry

A chemist carries out a reaction between 10.0g of sodium and 20.0g chlorine. Which reactant element is present in excess? What quantity of sodium chloride is produced? What quantity of the elment in short supply would have been required to react with all

128. ## Data Communications / Networking

True Or False: Network Architectures are cohesive layers of protocols defining a set of communication services.

Identify the domain and range: 1.) y = x^2 / 4x^2 - 1 2.) y = -3 / (x+2)^2 + 1 3.) y = ³√-x^2

130. ## science

how can my son a 5th grader be able to design an expermient with a lab report that theaches others how to use a balance correctly

131. ## Physics: Data Analysis - Power Law

In an experiment, two variables quantities 'x' and 'y' were measure. The relation between x and y is thought to be y=ax^(1/2) x(m)+/- 0.01m 0.10 0.20 0.40 0.80 1.00 y(s) +/- 0.05s 0.64 0.90 1.27 1.80 1.90 a) What will you graph in the y- and x- axis in

132. ## English

How did Arthur Miller use the witch trials to represent the McCarthy witch hunt?

133. ## statistics

Solve the problem. The lifetime of a new brand of light bulb can be described by a Normal model with a mean of 2000 hours and a standard deviation of 250 hours. Find the percentage of light bulbs that will last more than 2600 hours. A.) 100% B.) 5% C.)

134. ## Physics

Annie is walking to school leisurely at a speed of 1.0 m/s for the first half of her trip. She then remembers that her physics teacher told her that she must average 2.5 m/s to make it to school on time. Realizing she might be late, she starts running.

135. ## science

When a parent radioactive nucleus splits by ejecting an alpha particles (two protons and two netutrons), the remaining nucleus has ____ the original nucleus. a) two protons and two neutrons more than b) two protons more and two neutrons less than c) two

136. ## Math - function problems

1) A box with a square base has a total surface area of 12m^2. Express the volume of the box as a function of the base edge. 2) A 10 foot tall lamppost causes a child 4 feet tall to cast a shadow of x feet on the ground. If the distance along the ground

137. ## Physic

It is possible to shoot an arrow at a speed as high as 121 m/s. (a) If friction is neglected, how high would an arrow launched at this speed rise if shot straight up?

138. ## berkner

what would happen if correct new edvidence was discovered that did not agree with a weel established scientific theory?

139. ## English

Can you please check if the following questions are grammatically correct? Thank you very much. 1)What does Bassanio need money for? OR Why does.... He needs money so that he can go to Belmont and court Portia. 2) What solution does Antonio suggest to him?

140. ## analogy

large is to small, feast is to

141. ## physics

A roller coaster travels 10.6 m at an angle of 15.0◦ above the horizontal. How far does it move horizontally? Answer in units of m.

142. ## Algebra

we need help and the steps to solve 5x-y=18 and 5x+6y=-38. we need the ordered pairs if any. So far we came up with (6,-9). Thanks Team A

225. ## European History

Explain the impact of Europe’s geography on European History.

226. ## drama

how do you write the crtique of a movie

227. ## physics

An object with constant acceleration has velocity v = 12 m/s when it is at x = 6 m and v = 17 m/s when it is at x = 10 m. What is its acceleration?

228. ## Calculus

If h(t) represents the height of an object above ground level at time t and h(t) is given by h(t)=-16t2+11t+1 find the height of the object at the time when the speed is zero.

229. ## physics

In the diagram below, qA = 9.8 µC & qB = -1.4 µC. There is no charge at point C. The distance between A & C is 2.1 cm and the distance between B & C is 9.6 cm. Find the electric potential at point C

can afsedrniru be unscrambled into a noun? :)

231. ## Science-Chemistry

Analysis questions: A) What evidence is there that the gas bubbles formed in the first part of the investigation were hydrogen gas? Answer: Evidence there was that proved that the gas bubbles formed in the first part of the investigation were hydrogen gas

250. ## Lang Arts

Can you tell me four homonyms.

251. ## Just One More Math

How would you solve this if f(x)= {(3,5),(2,4),(1,7)}?: 1/f(x)

252. ## arithmetic

what is an abundant number

253. ## criminal justice 220

How can prosecutors ensure they don't allow their own personal bias's to influence their actions in the courtroom.

254. ## criminal justice 220

how much can our own beliefs influence our actions? Are prosecutors immune from this?

255. ## Geography

I am having A LOT of trouble locating river Severn on a map of the UK. I don't have and atalas with me and I can't find a map that shows me. Thank you!

256. ## science

What are the chemical elements in citric acid?

257. ## math

find the roots of f(x)=x^2-1.5x+1

258. ## college: psychology

3. Define proactive & retroactive inhibition. Create a memory strategy to help you remember & discriminate between them. Explain this strategy well enough so that a reader could learn to use it.

259. ## math

I am trying to find a pattern in these numbers. I have looked for what feels like hours, and can't find it. -3,-9,-14,-42,-47,-141

260. ## math

whats the sum of a number and -5 and a number

what is 117 put in simplest form

What 5 types of changes would take place in Canadian citizens if Canada were to become self-sufficient. (our teacher said they can be positive and others negative, but personally I don't think it would be negative? please help!!

263. ## English

Here are some more sentences on school rules I'd like you to revise. Thank you very much for all. 1) You are not allowed to change your sitting order unlesstold by your tutor. You have to sit in the same place when you are in the linguistic laboratory.(how

264. ## geometric series

what is the nth term equation for a geometric sequence with a1 = 36 and r = 1/3

265. ## calculus

Solve: sec(x)^2= 3tanx +1 *** It is suppose to be the sqaure root of 3 but i could find the symbol so just wrote the 3 without it but it is suppose to be the square root of 3 times tanx + 1

266. ## Science

What is it called when scientists do their experiments more than once to reduce chance errors?

267. ## geometry

At rosemead high school, 94 students take biology, 86 take ethnic studies, and 95 take geometry. thirty-seven students take both biology and geometry, 43 take geometry and ethnic studies, and 42 take ethnic studies and biology. twenty eight students take

what do you think is some good ideas for a journal as an artisan, a knight, a farmer, a mother with small children, a feudal lord, or a merchant.