# Questions Asked onApril 22, 2016

1. ## maths

A girl walks 50m on a bearing 025° and then 200m due east.How far is she from her starting point

2. ## Calculus I

Which of the following represents the volume of the solid formed by revolving the region bounded by the graphs of y =x^3, y = 1, and x = 2, about the line x = 2?

3. ## Geometry

A circle has a radius of 3 an arc in this circle has a central angle of 20 degrees what is the length of the arc

4. ## Math

In trapezoid $ABCD$, $\overline{BC} \parallel \overline{AD}$, $\angle ABD = 105^\circ$, $\angle A = 43^\circ$, and $\angle C = 141^\circ$. Find $\angle CBD$, in degrees.

5. ## American History

The results of the 2000 presidential election were difficult to determine because of A,Ralph Nader’s third-party candidacy b.both candidates being baby boomers c.voting irregularities in the state of Florida D.he Electoral College votes being evenly

6. ## World History

Firebombing of Tokyo. What were the bombers ordered to destroy?

7. ## science

describe fully the image of a candle flame located 10 cm from a concave spherical mirror with a radius of curvature of 16 cm

Calculate the standard cell potential at 25 ∘C for the reaction X(s)+2Y+(aq)¨X2+(aq)+2Y(s) where ƒ¢H∘ = -653 kJ and ƒ¢S∘ = -263 J/K .

9. ## Math

What is the volume of a cereal box that is 2 inches thick, 12 inches high and 10 inches wide?

10. ## chemistry

Disilane gas undergoes combustion to form solid silicon dioxide and water

11. ## Calculus Help

Evaluate lim x-->25 5 - square root x / x - 25 I don't get how the answer is -1/10

12. ## geometry (check my answers)

determine whether the following statements are true or false: 1. all squares are rectangles false 2. all squares are parallelograms false 3. all rectangles are parallelograms true 4. all squares are rhombuses true 5. all rhombuses are parallelograms true

13. ## Math

*Edited* (thanks Alex!) In a class, 4/5 of the girls have brown hair. Of the brown-haired girls, 3/4 of the have long hair. Of the girls with long brown hair, 1/3 of them have green eyes. Question: What fraction of the girls in the class have long brown

14. ## Chemistry

Which of the following has the highest boiling point? (Think of intermolecular forces) CHCl3, CH4, CH2Cl2, CH2I2, CHBr3, CHI3 Ive tried to answer this question twice and have one attempt left. Here's what I've done: CHCl3 -Boiling Point: -61.2 Degrees C

15. ## Math

The intrinsic rate of increase (r) for northern elephant seals about 0.15 (per annum). We will assume that population regulation is linearly density dependent. a. If the carrying capacity of elephant seals at a recently recolonized island is 1000 adult

16. ## English

Hi can anybody help me with my assignment if I did correct my answers.thanks

17. ## Chemistry

How do you do the question: react 3.50 g of solid sodium metal with water to produce hydrogen gas and sodium hydroxide. If,at the end of the reaction there is 6.8 L of solution, what is the concentration of sodium hydroxide? This is realy quite urgent. I

18. ## Math

1. –(10)^–1 (1 point) –1/10*** -1/-1^10 1/10 10 2. 1/c^-5 (1 point) c^5 5c –c^5*** –5/c 3. What is the value of y^-5/x^-3 for x = 2 and y = –4? (1 point) 10/3 128 -1/128 –128*** 4. Is the number written in scientific notation? If not,

19. ## History

“Without consideration of ‘traditions’ and prejudices, it [Germany] must find the courage to gather our people and their strength for an advance along the road that will lead this people from its present restricted living space to new land and soil,

20. ## Trigonometry

Prove the following identities: 1. (tan theta - sin theta)^2 + (1-cos theta)^2 = (1-sec theta) ^2 2. (1-2cos^2 theta) / sin theta cos theta = tan theta - cot theta 3. (sin theta + cos theta ) ^2 + (sin theta - cos theta ) ^2 = 2 Thank you so much! :)

21. ## chemistry

In an experiment, 95.0 mL of 0.225 M silver nitrate was mixed rapidly with 47.5 mL of 0.225 M calcium chloride in a coffee cup calorimeter. If a reaction occurred, was it exothermic or endothermic? If the reaction started at 23.7 °C, what is the final

22. ## Math

Solve the system below: Y= x^2-4 Y= -4 A. 0, -4 B. -4, 0 C. 0, -4)(-4,0 D. No solution

23. ## Math

Give examples of function

24. ## english

Prompt A: Compare and contrast the topics and themes of writers from the Americas and European writers. Include specific examples to support your statements.

25. ## Language Art, please check!

1. Tiny Tim’s father, Bob Cratchit, works for Scrooge. What is the appositive in this sentence? Tiny Tim father Bob Cratchit *** Scrooge 2. The Ghost of Christmas Future, the third spirit, takes Scrooge to see his grave. What is the appositive phrase in

26. ## math

Suppose that y varies inversely as the square of x, and that y = 9 when x = 19. What is y when x = 17? (Round off your answer to 2 decimal places.)

27. ## AP Chemistry

The normal boiling point of methanol is 64.7°C. A solution containing a nonvolatile solute dissolved in methanol has a vapor pressure of 642.3 torr at 64.7°C. What is the mole fraction of methanol in this solution?

The influx of new immigrants in the 1980s and 1990s motivated many native-born Americans to A.campaign to make English their state’s official language. B.push for bilingual education programs in public schools C.boycott businesses that gave jobs to

29. ## Calculus I

The base of a solid is the circle x^2 + y^2 = 9. Cross sections of the solid perpendicular to the x-axis are squares. What is the volume, in cubic units, of the solid?

30. ## Math, NEEDS HELP EMEDIETLY!

Q: Marissa Is researching information about martial arts students. She found that 7 out of 12 martial arts students practice each day. there are 144 students at her school. Part A: Predict how many students practice every day. Part B: What Is The Sample

31. ## Stat

Does anyone know how to solve for this Suppose that a principal of a local high school tracks the number of minutes his students spend texting on a given school day. He finds that the distribution of minutes spent texting is roughly normal with a mean of

32. ## Language Arts (Check Answers)

"President Lincoln's Declaration of Emancipation, January 1, 1863 by Frances E. W. Harper It shall flash through coming ages, It shall light the distant years; And eyes now dim with sorrow Shall be brighter through their tears It shall flush the mountain

33. ## LA

Read the passage. What technique is the author using to develop point of view? Though zoos are meant to be a joy to viewers and teach lessons about our earth, the zoo jails its inhabitants and passes on faulty knowledge A) State a claim B) Persuasive

34. ## math

In a class, 4/5 of the girls have brown hair. Of the brown-haired girls, 3/4 of the have long hair. Of the girls with long brown hair, 1/3 of them have green eyes.

35. ## English

1. I've spent all my money already. 2. She spent ¡Ì100 on a new dress. 3. I've used all my money already. 4. She used ¡Ì100 on a new dress. --------------------- Can we use both 'spent' and 'used' in the sentences? 5. I used up my allowance in two

36. ## English

I want to be helped about a prepaired speech that says Traditional healers should be allowed to practise and prescribe medicine in hospitals and clinics

37. ## Physics

Lieutenant Wharf, of mass 98.3 kg, is outside the space shuttlecraft Enigma trying to repair a broken warp engine nacelle. He finds he has drifted away from the shuttle while carelessly daydreaming. Miraculously, a stray photon torpedo casing (mass 2,020

38. ## Physics

In order to construct a fort in your backyard, it is critical that you calculate location of the centre of mass of three sticks in particular, each of which is identical with mass 2.5 kg. The first stick is located on the x-axis and is placed from x = 0 to

39. ## Physics

Suppose you observe your friend (mass 66.6 kg) stand at the very edge of a motionless merry-go-round (modelled as a thin disk with moment of inertia 5.7 kg m 2). At some point, your friend walks around and along the edge at a speed 1.4 m/s perfectly

40. ## Physics

Suppose you’re eating in a restaurant where the dishes are shared at the table and all placed uniformly on a rotating disk-like surface. Model this surface as a thin disk of radius 33.4 cm. You can’t stop thinking about physics even though you’re out

41. ## Physics

Suppose you’re eating in yet another restaurant where the dishes are shared at the table and all placed uniformly on a rotating disk-like surface. Model this surface as a thin disk of radius 30 cm. Someone else has spun the surface, such that it is

42. ## Program

Write a pseudocode and algorithm that to else the user to input 10 numbers in program we display the largest number

43. ## Physics

A skier of mass 110 kg travels down a frictionless ski trial. a.) If the top of the trail is a height 200m above the bottom, what is the work done by gravity on the skier? b.) Find the velocity of the skier when he reaches the bottom of the ski trail.

44. ## Physics

A 0.294-kg box is placed in contact with a spring of stiffness 3.792×102 N/m. The spring is compressed 1.42×10-1 m from its unstrained length. The spring is then released, the block slides across a frictionless tabletop, and it flies through the air. The

45. ## chemistry

A 0.039 M solution of a weak acid (HA) has a pH of 4.28. What is the Ka of the acid?

46. ## Math

If p is x-2 is greater and equal to 3, what is the negation of p?

47. ## Mathematics

Find, using substitution, the integral of: e^x /sqrt[e^(2x) -1] dx

48. ## Complex number cartesian form

Hello everyone, Need a bit of help. (-2-2i)^5 I want to turn this into Cartesian form using the modulus. Into the form z^n=r^n(cos n0 +i sin n0) So far I have r=2sqrt(2) The angle ive worked out as pi/4 or 45 degrees (im not 100% confident here). Now im a

49. ## HELP ME MATH

There are two triangles one large and one small. Write an expression in simplest form for the perimeter of each triangle. Large triangle left side says 4x+2 top says 7x+7 bottom days 5x-4. Small triangle left side says x+3 top says 2x-5 and bottom says

50. ## Life Orientation

Identify your 3 human rights violation or discrimination and explain in an introductory paragraph why you choose the specific human rights violation or discrimination

51. ## MATH

rying to verify the volume of a rectanguler prism h=10 inches w=2 and the formula to find the volume is l.w.h not a math genius just trying to make sure i am calculating this correctly to find the lengh we had to divide the width of the prism so 2 inches

52. ## chemistry

Consider the following reaction. 2 CO (g) + O2 (g) −→ 2 CO2 (g) What is most likely true about the entropy change for this reaction? Why would the delta s of the rxn be less than zero? thanks.

53. ## cal

dy/dx=5x^2/8y^2

54. ## life orientation

identify your human rights violation or discrimination and explain in and introductory paragraph why you choose the specific human rights violation or discrimination

55. ## Science

An atom has a mass number 53 and an atomic number of 26. How many neutrons does it have? Include a formula that explains your calculation.

56. ## lambton

A rotating flywheel of diameter 48.0 cm uniformly accelerates from rest to 240 rad/s in 15.0 s. Find the linear velocity of a point on the rim of the wheel after 15.0 s. Round answer to one decimal place.

57. ## Math

If an oval is 225 yards how many feet of fence go around it fence is sold by foot how o I figure it out

58. ## MATHS

do molecules increase in during linear expansitivity

59. ## Algebra

Probability of drawing a red diamond from a 52 card deck of cards.

60. ## math

What are the mean, median, mode, and range of the data set 18, 19, 20, 21, 23, 26, 26, 26? A. mean=22.4; median=22; mode=26 B.mean=22.4; median=26; mode=22 C.mean=26; median=22.4; mode=24 D.mean= 23.4 median= 22; mode= 26 my answer is A is that correct??

asked by just needing some help
61. ## history

The cities of New York, Baltimore, and Philadelphia began to become wealthy in the late-1600s because of what economic activity?

62. ## H/science

What Is Health Science

63. ## Calculus I

The area enclosed by the curve y^2 = x(2 − x) is given by what definite integral? Should I begin by square rooting both sides? Not really sure.

64. ## Chemistry

How do I answer this question? The average rate of disappearance of ozone in the reaction 2O3 --> 3O2 is found to be 8.12 x 10^-3 molecules over 15 seconds. What is the rate of appearance of O2 during this interval?

65. ## Chemistry

What is the solubility, in moles/liter, of PbCl2 if the Ksp =7.3 x 10^12

66. ## Chemistry

Calculate the heat released when 42.0 g of water at 35.0 degrees Celsius is converted to ice at -5.0 degrees Celsius. The specific heat of ice is 2.03 J/(g C), the molar heat of fusion of ice is 6010 J/mol, and the specific heat of water is 4.18 J/(g C)

90. ## math

The following sample data are from a normal population: 10, 9, 12, 14, 13, 11, 6, 5. a. What is the point estimate of the population mean?

91. ## Chemisty

Combustion of hydrogen sulphide with oxygen in kmol H2S +O2 = H2O + SO2 can somebody balance this for me and break it down to the atomic mass.

92. ## Chemistry

On Standardization of 10 mL of NaOH approximately 0, 1 m with HCl, 9.5 mL of spent acid. Knowing that this acid was standardized with 5 mL of Na2CO3 0,05 m 0 where spent 4.8 mL determine the Molarity of HCl used and Molarity found to NaOH.

93. ## physics

A train blows horn for 5seconds.Find the time for which a person standing at the platform hears the horn if speed of train is 20m/s and speed of sound is 340m/s.

94. ## Chemistry

Which of the following is a stronger lewis base: cyanide ion or dicarbide ion? I'm assuming it is the dicarbide ion as it is more negatively charged and a compound consisting of 2 carbons is larger and therefore more likely to lose electrons than something

95. ## stat

** I already finish these questions Can you answer so I can compare my final answers w/ yours.** Suppose that a principal of a local high school tracks the number of minutes his students spend texting on a given school day. He finds that the distribution

96. ## algebra

638 divided by 8

97. ## English

1. Did you hear he has dumped his girlfriend? 2. Did you hear he has broken up with his girlfriend? --------------- Are both the same in meaning?

98. ## Calculus I

Find the volume of the solid formed by rotating the region bounded by the graph of y equals 1 plus the square root of x, the y-axis, and the line y = 3 about the x-axis.

99. ## math

trying to verify the volume of a rectanguler prism h=10 inches w=2 and the formula to find the volume is l.w.h not a math genius just trying to make sure i am calculating this correctly to find the lengh we had to divide the width of the prism so 2 inches

100. ## Math

Can you define the variable, four more than a number divided by 2 is ten.

101. ## math HELP

the graph below was drawn with output on the vertical axis and input on the horzontal axis what does this graph indecate about the relationship between the input and the output

102. ## World History

How many Allied soldiers will be involved in the invasion of Japan?

103. ## science

6co2(aq)+ 12h2o(l) c6h12o6(aq)+6o2(aq)+602(a90 q)+6h2o

104. ## Finance

You can save \$ 1,500 each year in saving account that pays 4% interes quarterly. How much will you have in 5 year? What if interest was compounded semi annual? What is interest was compund annual?

105. ## History

Hello, recently our grade was assigned a history project on the California gold rush. One of the topics we have to include is the 5 mining towns in California. So far, I know 2 which are San Francisco and Sacramento. Can you help me find the rest? Thank

106. ## Chemisty

Combustion of hydrogen sulphide with oxygen in kmol H2S +O2 = H2O + SO2 can somebody balance this for me and break it down to the atomic mass.

107. ## Physics

A 111 gram tennis ball strikes the court ground vertically with a speed of 3.6 m/s. If the ball bounces back with a speed of 2.2 m/s vertically upward, find the magnitude of the change in the tennis ball’s momentum, in kg m/s.

108. ## physics

A typical red blood cell subtends an angle of only 1.7×10−5 rad when viewed at a person's near-point distance of 25 cm. Suppose a red blood cell is examined with a compound microscope in which the objective and eyepiece are separated by a distance of

109. ## Chemistry

The pH of human blood needs to be between 7.35 and 7.45. You want to prepare a buffer solution that gives a pH of 7.40. You decide to use a sodium phosphate buffer: the acid is H2PO− 4 and the conjugate base is HPO2− 4 . You want the concentration of

110. ## Physics

To test out your new foam dart blaster, you hang a small cube, size 5cm on a side with mass 0.4 kg, from your ceiling. You then fire a 46 gram foam dart at the bottom of it with a speed of 15.3 m/s, and the dart sticks to the cube. Calculate the height in

111. ## Physics

A frustrated hockey player, at rest on a frictionless ice rink, throws his stick into the crowd. Since you don’t normally go to hockey games, you decide to turn this into a physics problem and calculate the mass of this player. You observe that the stick

112. ## chemistry

to what temperature must a given mass of nitrogen at zero degree be heated so that both it volume and pressure will be doubled

113. ## Physics

Calculate the distance, in m, of the centre of mass of the Earth-Moon system from the centre of the Earth. Note: the mass of the Moon is 7.35x10 22kg, the mass of the Earth is 5.98x10 24kg, and their separation is 3.85x10 8m.

114. ## Physics

A hoop of radius 1.4 m and mass 11.5 kg has a small ball stuck to its inside surface. The ball has a radius of one quarter that of the hoop, and twice the hoop’s mass. The hoop may roll freely, without slipping. Similarly, the ball may roll along the

115. ## Physics

A potter’s wheel is spinning with an angular speed of 4.5 rad/s. When the potter stops working, the wheel slows down with an angular acceleration of -0.5 rad/s 2. Calculate the angle, in radians, through which the wheel has turned by the time its angular

116. ## Physics

Suppose you start riding your bicycle from rest, and the wheels reach an angular speed of 296 rpm in 4.5 seconds. How many complete revolutions do the wheels make in this time?

117. ## Physics

Now your bicycle wheel is rotating with an angular speed of 43.8 rad/s. The wheel has a mass of 4.9 kg and a radius of 48.6 cm. Treat the wheel as a solid thin disc. (a) Calculate the rotational kinetic energy of the wheel in J. (b) Calculate the angular

118. ## Physics

Suppose you have a system of two masses strung over a pulley. Mass 1 (6.5 kg) hangs on the right side of the pulley suspended over the ground at height 1 m. Mass 2 (2.2 kg) hangs over the left side of the pulley and rests on the ground. The pulley is a

119. ## Math

I don¡¯t know how to slove this problem can someone help me£¿ The shorter leg of a 30¡ã60¡ã90¡ãtriangle is 2.5 feet long.Find the perimeter.

120. ## Chemistry

4.13 grams of magnesium chloride were recovered after the chemical reaction between magnesium and chlorine gas occurred. If 7.10 grams of magnesium chloride was suppose to be produced, what is the percent yield of magnesium chloride?

121. ## Dynamic

A stone is dropped into a well with initial velocity zero from a point 5 m above the mouth of the well and the splash is heard after 7 s. A second stone is thrown into the well with initial velocity uₒ from the same point and the splash is heard after 5

122. ## Dynamic

A stone is thrown up with a velocity of 20 m/s. While coming down, it strikes a glass pan, held at half the height through which it has risen and loses half of its velocity in breaking the glass. Find the velocity with which it will strike the ground.

123. ## math

A ladder is placed against a wall with an angle between the ladder and the ground of 76°. If the ladder must reach 10 m up the wall, how long does the ladder need to be?

124. ## Physics

A massless rod of length L = 3.6 m stands up straight, fixed to the ground by a bolt. A horizontal force of 5.5 N is applied at a vertical distance of L/2 to the right. To counter this force and keep the rod stationary, a wire is fixed at the top of the

125. ## math

How is the squareroot of -1 classified?

126. ## Physics

Suppose you’re building a contraption which contains a solid rod of length L = 12.5 m and mass 4.9 kg. This rod has its lower end barely above the ground at an angle of 20.6 degrees with respect to the horizontal, and is ultimately held up by a rope

127. ## Physics

Two scales support a massless plank from either end, separated by 3 m. A person, whose height is less than 3 m, lies down on the plank with their head on the leftmost scale. The leftmost scale reads 314 N, and the rightmost scale reads 112 N. (a) Calculate

128. ## Chemistry

Consider the following reaction. 2 CO (g) + O2 (g) −→ 2 CO2 (g) What is most likely true about the entropy change for this reaction? Delta Srxn < 0 or Delta Srxn > 0. Why is it Delta Srxn < 0 ?

129. ## PHYSICS

A cell phone emits signs in approximately 750 Mhz. Which is the wavelength and energy of this radiation

130. ## science

find the energy of first excited state of helium

131. ## science

write down the possible terms of one electron system corresponding to n=2

132. ## science

The cohrence length of a light source is 2.45×10raise to power-2 calculate width of spectral line

A printing press is considering borrowing GHS35, 000 to purchase a new generator set. This move is to argument power supply as the current power crisis is having a serious negative effect, on the company’s production and revenue base. Its bankers are

134. ## math

Martha rides 29 miles everyday about how many miles does Martha ride in 6 weeks

135. ## math

Martha rides 29 miles everyday on her bike about how many miles did she ride in 6 weeks

137. ## Physics

Two vector of 5N and 6N flow they oriented to get the resultant of 7N,9N?( please solve this question)

138. ## Life orientation

Identify your 3 human rights violations or discriminations and explain in an introductory paragraph why you choose the specefic human rights violations or discriminations

139. ## LIFE ORIENTATION

critically discuss 6 ways that the human rights violation influences individual , groups and broders south african community

140. ## Math: Statistics

I am trying to report significant data but I'm not sure how to write it out professionally. I did two nominal variables in a chi square test on SPSS. The significance I found is .061 across from "Likelihood Ratio" and under "Asymp sig. 2 Sided". Does that

141. ## physics

A sphere of radius 0.500 m, temperature 25.7°C, and emissivity 0.915 is isolated in an environment of temperature 77.0°C. At what rate does the sphere emit thermal radiation? At what rate does the sphere absorb thermal radiation? What is the sphere's net

142. ## English

Hello. I will be grateful for some help. Do you think I need to put commas in the following context: "The article, devoted to ... (a long phrase)..., analyzes.."? Thank you for your time and advice.

143. ## Mathematics

Use substitution to solve: sec^2x/(tan^2x -1) dx What substitution should I use (what should I let 'u' equal)? I've tried using substitutions for tan or sec, i.e. tan^2x +1 = sec^2x , but I can't get the answer.

144. ## help azap math

Latasha went to the fabric store and bought yards of red fabric and yards of blue fabric. How many yards of fabric did Latasha buy altogether? A student solved the problem this way: Latasha bought yards of fabric. Use a similar strategy to solve this

145. ## Precal

Solve the equation: Logx=1-log(x-3)

146. ## Technology

What is the machanical advantage of this system?

147. ## Social Studies (please check ms. sue)

1. Why did farm prices fall in the 1950’s? a. Farmers bought new expensive machinery b. Farmers produced more than they could sell*** c. Farmers could not sell their products in Europe d. Farmers saw their government subsidies reduced 2. What shortage