# Questions Asked onFebruary 21, 2014

1. ## Chem

Complete the Bronsted lowry reactions HPO42-+H+ HPO42-+OH-

2. ## Math

A container needs to package hazardous chemicals in a special plastic rectangular prism that holds 80 cubic feet. Find the whole number dimensions of the container that would use the least amount of plastic. My answer is 5ft, 2ft, and 4ft

3. ## physics

Drag-race tires in contact with an asphalt surface have a very high coefficient of static fric.tion. Assuming a constant acceleration and no slipping of tires, estimate the coefficient of static friction needed for a drag racer to cover 2.1 km in 8 s,

4. ## Science

Which of the following must be true about the structures of axons and muscle cells in order for nerve impulses to stimulate muscle contraction? a- Axons and muscle cells must both have structures that make and secrete the same small molecules. b- axons and

5. ## Chemistry

What would be the density of Hydrogen gas at 500 C and 0.76 atm?

6. ## Physics.

From greatest to least, rank the accelerations of the boxes. C. B. A. D.

7. ## math

My Math Problem When wrapping a birthday gift for his mother, Kenji adds an additional 2.5 square feet of gift wrap to allow for overlap. How many square feet of gift wrap will Kenji use to wrap a gift 3.5 feet long, 18 inches wide, and 2 feet high? My

8. ## math

i am a number between 60 and 100. my ones digit is two less than my tens digit. i am a prime number. what number am i? explain.

9. ## Statistics

Selecting a letter of the alphabet: If 3 letters of the alphabet are selected at random, find the probability of getting at least one letter "x". Letters can be used more than once. My answer was: P(at least 1 "x) = 1 - (25/26)^3 = 1951/17576 or 0.11 Is

10. ## Physics

Consider a car is heading down a 5.5° slope (one that makes an angle of 5.5° with the horizontal) under the following road conditions. You may assume that the weight of the car is evenly distributed on all four tires and that the coefficient of static

11. ## Probability

A player is randomly dealt a sequence of 13 cards from a standard 52-card deck. All sequences of 13 cards are equally likely. In an equivalent model, the cards are chosen and dealt one at a time. When choosing a card, the dealer is equally likely to pick

12. ## Physics

Two automobiles, each of mass 800kg , are moving at the same speed, 18m/s , when they collide and stick together. At what speed does the wreckage move if one car was driving north and one east.

13. ## Social studies

I have tried to answer these im just not sure help plz. 1. Which word best describes modern life for Japanese teenagers such as Asuka? relaxed crowded isolated traditional 2. Tropical storms often hit Japan during the ________. summer winter spring fall 3.

14. ## algebra

Which inequality represent the following eight fewer than a number is at least sentence 20 answers are. X-8>20. 8-X>20, x+8

15. ## chemistry

WRITE DOWN REACTION OF HYDROLYSIS OF NH4NO2 IN NET IONIC FORM. INDICATE REACTION OF MEDIUM.

16. ## Chemistry

AgNO3 + NaCl → AgCl + NaNO3 . How many grams of NaCl would be required to react with 446 mL of 0.211 M AgNO3 solution? Answer in units of grams

17. ## math

A colony of bacteria is growing in a petri dish which has a maximum capacity of 100mg. The mass of bacteria is increasing at a rate given by the logistic equation. Initially there is 2mg of bacteria and the rate of increase is 1mg per day.

18. ## Math! HELP!

For questions 14-15, find the simplified form of each expression. (3/2b^4)^3 (3/5y^4)^-2

19. ## Language Arts (Please check!)

Choose the type of punctuation that is missing from this sentence. The pet store shelves were filled with items I wanted for my pets. a. apostrophe b. semi-colon c. colon d. hyphen ** Choose the type of punctuation that is missing from this sentence. Were

20. ## physics

The distance between two telephone poles is 49 m. When a 1.6 kg bird lands on the telephone wire midway between the poles, the wire sags 0.149 m. The acceleration of gravity is 9.8 m/s2 . How much tension in the wire does the bird produce? Ignore the

If 7000 dollars is invested in a bank account at an interest rate of 7 per cent per year. A) Find the amount in the bank after 6 years if interest is compounded annually? B) Find the amount in the bank after 6 years if interest is compounded quaterly? C)

22. ## Physics

Sherlock Holmes examines a clue by holding his magnifying glass (with a focal length of 26.5 cm) 15.1 cm away from an object. Find the image distance. Answer in units of cm

23. ## Physics

A single mass (m1 = 3.2 kg) hangs from a spring in a motionless elevator. The spring constant is k = 253 N/m. 1) What is the distance the spring is stretched from its unstretched length? This first answer is equal to 12.4 cm but I am having trouble on the

24. ## Algebra 1

Genie has 100 feet of fence with which to make a rectangular cage for her rabbit. If she uses the wall of her house as one side, the area of the cage in square feet is given by the polynomial -2w^2 + 100w, where w is the width of the cage in feet. What is

25. ## Physics

An electric dipole is formed from two charges, ±q, spaced 1.00cm apart. The dipole is at the origin, oriented along the y-axis. The electric field strength at the point (x,y)=(0cm,10cm) is 320N/C . What is the charge q? Give your answer in nC. What is the

26. ## Pre-calculus

C=80,000p/(100-p) A)what happens of the company tries to remove 100 percent of the pollutants? Will it work or will it cost too much? B)draw a diagram to show what the consequences of the last question would be. Label the verticals asymptote(s) and analyze

27. ## Chemistry

In a 1.0 x10-6 M of HNO3 (aq) at 25 degrees celsius identify the relative molar amounts of theses species HNO3- H3O+ OH- NO3- H2O

28. ## Math

Kamal bought 7 packs of paper clips for a project. Then he bought 8 more packs. There are 25 paper clips in each pack. How many paper clips did he buy?

29. ## history

What was the role of civil service examinations in Ming China? does anyone have any idea what the answer could be. I was looking on the internet and found this- --The civil service examination system, a an effective cultural, social, political, and

30. ## Math

why is an idea like the pacific?

31. ## biology

a farmer sprays insecticide on his crops and notices that the insect pest problems disappear. a year later he tries the same insecticide only to find that he did not achieve the same result. the insect population shows resistance to the insecticide. This

32. ## physics

A person stands on a bathroom scale on a motionless elevator. When the elevator begins to move, the scale briefly reads 200 percent of the person's regular weight. Calculate the acceleration of the elevator, a_{elevator}. Use SI units

33. ## Chemistry

What are the concentrations of HSO4- and SO42- for a 0.0050 M sulfuric acid solution? We are trying to find x but not sure how to find it on the calculator, please help!!!

34. ## physics

A -kg block is initially at rest on a frictionless horizontal surface. It is pulled with a constant horizontal force N. How long must it be pulled before its speed is m/s? t_{pull} =

35. ## Chemistry 2

A solution of NaOH (aq) contains 8.2 grams of NaOH(s) per 100.0 mL of solution. Calcualte Ph and POH at 25 degrees celsiuis

36. ## Physics

At the instant a race began, a 89.1 kg sprinter exerted a force of 710 N on the starting block in the direction 110 degrees measured clockwise from the positive x-axis. (a) What was the horizontal acceleration of the sprinter? a_x = (b) If the force was

37. ## Chemistry 2

Calcualte PH and POh of an aqueous solution that is 0.050 M in HCL and 0.085 M in HBr at 25 degrees C

38. ## algebra

Solve the equation or formula for the indicated variable s=3r4t+or t answers are. t=s/3-r. t=r4-3s t=s/3r4. T=811/s

39. ## Physics 2

A beam of light is incident on a plane mirror at an angle of 35¨¬. If the mirror rotates through a small angle ¥è through what angle will the reflected ray rotate

40. ## Chemistry

120.0g of ice is melted, how much energy is absorbed?

41. ## algebra

A candy cane 20 cm high has a circumference of 3 cm. The red “ribbon” makes exactly 4 complete turns round the candy cane while its two ends touch the cane's top and bottom. How long is the ribbon in cm?

42. ## West Chester University

From greatest to least, rank the accelerations of the boxes. C. B. A. D.

110. ## Accointing , Economics and Life Science

I was wanting to find out that with the subjects l got what type of career could l have

111. ## Algebra 1

Can someone simply tell me what methods I must use in order to solve this word problem? Please, don't include the answer. I wish to solve this on my own. However, I would truly appreciate it if anyone could evaluate my answer afterwards. "A rectangle has a

112. ## chemistry

By how much will the vapor pressure of water decrease if a solution at 40.0°C is produced by dissolving 16.0212 g of K3PO4 (formula mass = 212.30 g/mol) with 40.8480 g of water. The vapor pressure of pure water at this temperature is 55.30 mmHg. If the

113. ## history

Throughout the seventeenth century, what was the relationship between Hungary and the Habsburg Empire?

114. ## american government

Judges who practice what their critics call “judicial activism” argue that judges (Points : 1) have a responsibility to protect individual rights and liberties. have a responsibility to be anti-majoritarian because democracy is not always a good thing.

115. ## american government

The Privileges and Immunities Clause of the Fourteenth Amendment means (Points : 1) citizens of the United States may travel across state lines without documentation. states must all have the exact same laws as each other. that if one state recognizes gay

116. ## chemistry

How would you prepare a solution of about 8mg/100ml of ascorbic acid in water (25ml)?

117. ## biology, genetics

Suppose that r, red, and sc, scarlet, are two recessive eye-color mutations that lie 20 map units apart on the Drosophila X chromosome, and that each causes a red eye color in place of the wild type purple color. A. If a female from pure-breeding rr stock

118. ## Chemistry

What conversion factor would you use to convert cubic decimeters to milliliters?

119. ## history

What effect did the boom in the demand for rubber have on Africa’s European colonies?

120. ## pysics

A 33.3- kg block (m1) is on a horizontal surface, connected to a 5.1-kg block (m2) by a massless string. The pulley is massless and frictionless. A force of 220.1 N acts on m1 at an angle of 32.p deg. The coefficient of kinetic friction between m1 and the

121. ## physics

(a) A car with a mass of 950 kg is moving to the right with a constant speed of 1.45 m/s. What is the total force on the car? (b) What is the total force on the car if it is moving to the left?

122. ## physics

If a toy plane is spinning on a string 1.87 meters off the ground and the string is .5m long how long does it take to make 10 revolutions?

123. ## science

Scientists performed an experiment to determine whether there is a connection between learning ability and food. They took two groups of 20 mice each, all from the same purebred strain. The mice were deprived of food for 3 days and then given a standard

124. ## organic chemistry

What is the condensed structural formula of methyl 2-aminobenzoate?

125. ## organic chemistry

Once it has been opened, and particularly if ithas been left open to the air, a bottle of aspirin may develop a vinegar-like odor.How this might happen?

126. ## Science:Chemistry

How does the silly putty made up of glue gel differ from the silly putty made of soap in terms of texture ? How would the touch be different and why? Chemical structure? .....?

127. ## physics

A force of 48 N is required to start a 7.8 kg box moving across a horizontal concrete floor. (a) What is the coefficient of static friction between the box and the floor? \mu_s = (b) Does the coefficent of friction have a unit? A. No, it is a ratio B. No,

128. ## physics

A block with a mass of 126 kg is pulled with a horizontal fource of F_{applied} across a rough floor. The coefficent of friction between the floor and the block is 0.7. If the block is moving at a constant velocity, what is the magnitude of F_{applied}?

129. ## Science

How does the silly putty made up of glue gel differ from the silly putty made of soap in terms of texture ? How would the touch be different and why? Chemical structure? .....? Science:Chemistry - bobpursley, Friday, February 21, 2014 at 9:53pm Have you

130. ## Physic

A large rock with a mass of 38.2 kg is rolling at a speed of 4.8 m/s. How much power is needed to stop the rock in 7.2 seconds?

131. ## A Peculiar Question

Can constant belittlement and hen-pecking be considered aspects of one's personality?

132. ## algebra

Graph the number on a number line 10/7

133. ## Science

Does a virus have to take over a host cell in order to reproduce?

134. ## social studies

Whats the distinguish between bills and resolutions ?

135. ## RE: History

Ms. Sue, Here are my reactions to the article about the survivors. Horrified, disgusted and heart-broken

#1. What is one thing a strong introduction does NOT do? a.) capture the reader's interest b.) present evidence to explain the topic******* c.) provide background information d.) state the main idea of the report #2. Which is the correct MLA citation for a

Use implicit differentiation to find the slope of the tangent line to the curve at the point (1,3) -4x^2+4xy-2y^3=-46 m=____? ty guys so much!

138. ## Physics 141

A car is on a circular track of radius r = 100 m. It's tangential speed is 30 m/s. How many lateral gravities does the driver feel?

139. ## Intermediate algebra

Can you show the work of how to work this word problem ? A local electronics store will sell 7 ax adapters and 2 rechargeable flashlights for $86 or 3 ac adapters and 4 rechargeable flashlights for$84. What is the price of a single ax adapter and a single

140. ## Algebra 1

Add (5x^2 - 2x + 9) + (2x^2 - 4). My answer: 7x^4 - 2x + 5 or 7x^2 - 2x + 5?

141. ## Chemistry

How many molecules of nitrogen are in 22.4 L of nitrogen at exactly 0 C and 3 atm?

142. ## English

Did a song about selfies really just play on my itunes radio? Should it be play it played

143. ## Algebra 1 (Reiny)

1Simplify the quotient (6.4 x 10^9) / (1.6 x 10^-3). Write the answer in scientific notation. My answer: 4 x 10^6? Simplify. 2. a^16/a^4 My answer: a^12? 3. (4y^6/x^3)^2 My answer: b^15/8?

144. ## phisecs

In a period of 3 h, a man walks 13 km north, turns around and walks 5 km south. Find his average velocity in km/h? Please pay attention to sign. (-) means the average velocity is to the south, (+) means the average velocity is to the North.

145. ## world geography

How has Italy’s economy changed since 1950

146. ## History

as a christian, persian king khosrow I forbade zoroastrian teaching throughout his empire true or false

147. ## Physics

An airplane has a mass of 3.25 × 104 kg and takes off under the influence of a constant net force of 2.38 × 104 N. What is the net force that acts on the plane's 74.6-kg pilot?

148. ## Calculus

¡ì(up:1 down:0) (x^3 dx)/(x^2+2x+1)

149. ## Calculus

¡ìdx/(x^2-1)^2

150. ## Math

(x^2+x-2) / (x^2-3x-4) X and y intercepts? Horizontal Asymptotes? Vertical Asymptotes?

151. ## Heale Care Ethics

I have to do a paper on the pros and cons of confidentiality. I am having trouble starting the paper. Can you help

152. ## Physics

A dragster and driver together have mass 900.7 kg. The dragster, starting from rest, attains a speed of 25.7 m/s in 0.54 s. 1. Find the average acceleration of the dragster during this time interval. Answer in units of m/s^2. 2. What is the size of the

153. ## economics

Let U(x; y) = 5x:8y:2 showing all derivation work, find: (a) the Marshallian demand functions for x and y (b) the Indirect Utility Function (c) the compensated demand functions xc and yc

154. ## Physics

a. An object has a mass of 33 kg. The acceleration of gravity is 9.8 m/ s^2. What is its weight on the earth? Answer in units of N. 2. What is its mass on the moon where the force of gravity is 1/6 that of the earth? Answer in units of kg. 3. What is the

155. ## Math

Given f(x) = –5x + 1, what is f(–2)?

156. ## Physics

1. Two blocks on a frictionless horizontal surface are connected by a light string. The acceleration of gravity is 9.8 m/s^2. Find the acceleration of the system. Answer in units of m/s^2. 2. What is the tension in the string between the blocks? Answer in

157. ## English

Which sentence is grammatical? There is no holes. There are no holes.

158. ## Science - Start of Physics

I need help with the following: Given below is the position-time graph representing motions of two runners, Nick and Ian. Use this graph to determine which runner has greater average velocity. For this one, I know the answer is 2m/0s, but I don't know if

159. ## phisecs

`filling the blanks: sun_________________ than moon. earth is__________________mercury.''.