Allen

Most popular questions and responses by Allen
1. Physic

Two resistors when connected in series to a 120-V line use one-fourth the power that is used when they are connected in parallel. If one resistor is 4.8 kohms. what is the resistance of the other?

2. Physic

A 2.5-kohms and a 3.7-kohms resistor are connected in parallel; this combination is connected in series with a 1.4 kohms resistor. If each resistor is rated at 0.5W (maximum without overheating), what is the maximum voltage that can be applied across the

3. Chem

Calculate the standard cell potential given the following standard reduction potentials: Al3++3e−→Al;E∘=−1.66 V Fe2++2e−→Fe;E∘=−0.440 V

4. Finance

The following information was available as of the close of business June 1, 2004 on government of Canada bonds. Coupon...Maturity.....Price.....Yield 5.00%......June 1, 2005......102.35......2.60 10.50%......June 1, 2006......113.91......3.26

5. Chemistry

Different manufacturers claim to have the best antacid. Which of the following tablets would neutralize the most acid for the money? A. Rolaids (550 mg CaCO3 and 110 mg Mg(OH)2 per tablet) – 150 tablets for \$9.44 B. Tums (500 mg CaCO3 per tablet) – 150

6. Physics

In a photoelectric-effect experiment it is observed that no current flows unless the wavelength is less than 570nm . A)What is the work function of this material? W0= in eV B) What is the stopping voltage required if light of wavelength 420nm is used?

7. Math

A decorative pottery bowl with a diameter of 30 cm is used as a garden ornament . A rain shower fills it with water to a maximum depth of 7 cm. The bowl is slowly tipped to remove the water. What angle will the rim of the bowl make with the horizontal when

8. Physics

In a photoelectric-effect experiment it is observed that no current flows unless the wavelength is less than 570nm . A)What is the work function of this material? W0= in eV B) What is the stopping voltage required if light of wavelength 420nm is used?

9. physics

What is the momentum of a 60 kg sprinter running at 8.0 m/s?

10. Physics

A baseball is tossed at a steep angle into the air and makes a smooth parabolic path. Its time in the air is t and it reaches a maximum height h. Assume that air resistance is negligible. a. Show that the height reached by the ball is gt^2/8. b. If the

11. Physic

A 75-W, 120-V bulb is connected in parallel with 25-W, 120-V bulb. What is the net resistance?

12. Math

Can anyone help with this question? Your backpack contains 2010 chocolate bars, which you are going to divide between your best friend and yourself. You think you are a nice person, so you will give your best friend more than zero chocolate bars. However,

13. finite math

suppose that 3 digits are selected at random from the set S={1,2,3,4,5,6} and are arranged in random order. Find the probability that the resulting 3-digit number is less than 300.

14. Physic

A 75-W, 120-V bulb is connected in parallel with 25-W, 120-V bulb. What is the net resistance?

15. Physics

For a record playing at 45 rpm, find the frequency and the angular velocity. Frequency= Angular velocity=

16. phics

In an experiment on motion, a cart weighing 240 N was pulled up an inclined plane. Which of the following would be the expected reading on the spring scale as the cart is pulled up an inclined plane set upon two books

17. statistics

In a binomial distribution: A) the random variable X is continuous. B)the probability of event of interest (pie symbol)is stable from trail to trial C) the number of trials n must be at least 30 D) the results of one trial are dependent on the results of

18. Physics

three horizontal forces are pulling on a ring at rest F1 is 6.25N at a 180 degree angle and F2 is 8.90 N at a 243 degree direction what is the x component of F3

19. Math

Did I simplify these together correctly (2-3i)-(3+5i)? 1) I distributed the negative through 3+5i and got -3-5i 2) then I eventually after that let the 2-3i the same so I have it as: 2-3i-3-5i 3) (2-3) -(-3i-5i) 4) 2-3=-1 and -3-5=-8 5) so eventually in

20. chemistry

A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 450 mL of a solution that has a concentration of Na+ ions of 0.700 M

21. Language Arts (english)

1.In general terms, how do the townspeople in “The Handsomest Drowned Man in the World” react to the body which washes up on their shore? 2.Why do the townspeople react to Esteban as they do? What is he to them? 3.What is a fable, how might “The

22. Physics

three horizontal forces are pulling on a ring at rest F1 is 100 N at a 45 degree angle and F2 is 135 N at a 160 degree direction what is the x component of F3

23. Physic

Two resistors when connected in series to a 120-V line use one-fourth the power that is used when they are connected in parallel. If one resistor is 4.8 kohms. what is the resistance of the other?

24. chemistry

how many grams of magnesium are required to liberate 250 cm3 of Hydrogen gas from HCL

25. chemsitry

Calculate the mass in grams of sodium bromide, NaBr, are needed to prepare 250.0 mL of a solution of sodium bromide that is 3.50% (m/v).

26. Physics

Three horizontal forces are pulling on a ring at rest. f1 is 6.25 N at 180 degree angle and f2 is 8.90 N at a 243 degree angle direction. What is the y component of F3

27. chemistry

A solution containing 40 g of calcium bromide requires 14.2 g of chlorine to react completely with it and 22,2 g of calcium chloride is produced in addition to ehaever bromine is obtained. How many grams of calcium bromide are required to produce 10.0

28. Literature! HELP

Romanticism became popular _____. A. before the Enlightenment B. during the Enlightenment C. at the end of the Enlightenment D. a century after the end of the Enlightenment

29. geometry

Find the perimeter and area of a right triangle if one leg measures 24 ft. and the other leg measures 70 ft. Please show the steps so I can do the next one. Thanks

30. geometry

Find the perimeter and area of a right triangle if one leg measures 24 ft. and the other leg measures 70 ft. Please show the steps so I can do the next one. Thanks

31. science

In space, astronauts don’t have gravity to keep them in place. That makes doing even simple tasks difficult. Gene Cernan was the first astronaut who worked on a task outside a spaceship. He said of the experience, “Every time I’d push or turn a

32. Solid mensuration

The bases of a triangular right prism are apart. find the volume and the total surface area of the prism if one side of the quilateral triangular base measures 6cm

33. cmsd

Your question: "The shorter diagonal of a rhombus is 50 mm long. Each of its obtuse angles measures 140. Find the length of each side."

34. english 30-1

write a short compostion discussing social satire in happy event. what aspects of society is satized? how are devices like irony and hyperbole is used to achieve satire? what changes does the author suggest?

35. Help1

WHY rational expressions that are being added must have an LCD, but rational expressions that are being multiplied do not need to have an LCD. The short answer is that addition and multiplication are different operations with different properties. If we

36. Physics

A rock thrown from a bridge hits the water below at a horizontal distance x directly below the throwing point. The rock travels a smooth parabolic path in time t. a. Show that the virtical distance of the bridge above water is 1/2gt^2. b. What is the

37. physics

Calculate the speed of water (in m/s) flowing from a pipe at the bottom of an open topped barrel which has a water level 138 cm high in it.

38. math

Your question: "The shorter diagonal of a rhombus is 50 mm long. Each of its obtuse angles measures 140. Find the length of each side."

39. physics

If you do 100 j work in 50 seconds, then your Power output is

40. math

A coin is tossed and then a die is rolled. Find the probability of getting a 5 on the die given that the coin landed tails up.

41. science

In space, astronauts don’t have gravity to keep them in place. That makes doing even simple tasks difficult. Gene Cernan was the first astronaut who worked on a task outside a spaceship. He said of the experience, “Every time I’d push or turn a

42. physics

A gamma-ray photon produces an electron-positron pair, each with a kinetic energy of 275keV . What was the energy of the photon? E=in MeV What was the wavelength of the photon? wavelength in m Please help thank you!

43. Math simple question

angles 1 and 2 are adjacent angles on a line. What is the sum of the measures of the angles? a.30 b.60 c.90 d. 180 I think the answer is b.

A bus leaves a station at 1p.m. traveling west at an average rate of 44 mi/h.one hour later a second bus leaves the same station traveling east at a rate of 48mi/h. At what time will the two buses be 274 miles apart I know that I am suppose to use d=r*t

45. math help? burnet help.

How is the the graph of y=1/4x -4 obtained from the graph of y=1/x? Horizontally stretched by a factor of 4 and shifted up by 4 units. Vertically stretched by a factor of 4 and shifted down by 4 units. < my answer Horizontally compressed by a factor of 4

46. Ap European

In what respect must each of the following share in the war guilt? Austria,Serbia,Russia,France,Britain,Germany

47. Physic

A 2.5-kohms and a 3.7-kohms resistor are connected in parallel; this combination is connected in series with a 1.4 kohms resistor. If each resistor is rated at 0.5W (maximum without overheating), what is the maximum voltage that can be applied across the

48. Physics

A block of mass 12.0 kg is initially sitting at rest on a 30.0o incline. There is a spring mounted to the ramp with spring constant k = 13500 N/m. The block is released to slide down the incline and comes to a stop momentarily after the spring has been

49. math

Tom sleeps an average of 7.73 hours a day. In one non-leap year, how many hours does Tom sleep?

50. algebra

A tower 25 meters tall casts a shadow 20.8 meters long. What is the distance from the top of the tower to the end of the shadow?

51. Math

Estimate. Then find the sum 540,943 + 382093

52. Ap European

In what respect must each of the following share in the war guilt? World war 1 Austria,Serbia,Russia,France,Britain,German

53. college physics

"The Magnitude of the buoyant force is equal to the weight of fluid displaced” is a statement of which principle in the study of fluids? Select one: a. Pascal's Principle b. Archimedes' Principle c. Bernouilli’s Principle d. The Equation of Continuity

54. College Physics

A 4.30 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 2.60 m, before compressing a spring of force constant 2.20 104 N/m. Find the maximum compression of the spring.

55. Physics

During a baseball game, a batter hits a pop-up to a fielder 83 m away. The acceleration of gravity is 9.8 m/s^2. If the ball remains in the air for 6.5 s, how high does it rise? Answer in units of m

Out of 42 kids in a class twice as many failed Ela as math,4 failed both. If 7 failed neither, find how many failed each subject. Show work thanks

57. TECH(recycle)

I'm making a recycle logo i need some good ideas to put in the logo and can u give me examples of good recycling logos

58. Math

two sides of a triangle are equal. The third side is 3 less than the sum of the two equal sides. The perimeter is 31 inches. Find the length of each side

59. history

cause: americans moved into spanish texas effect: what's an effect

60. physics

An astronaut, mass 128.2 kg including spacesuit, pushes off from the International Space Station (mass 110 tons) with a speed of 1.2 m/s. What is the speed of the Space station in the opposite direction? Use 2 s f. for your answer

61. finite math

Given n(A')=23, n(B')=16, and n((A [intersect] B) U (AUB)'))= 24, find (A [intersect] B) I apologize but intersect was the best way I found to represent the upside down U symbol.

62. chemistry

How many grams of carbon can be burned in 15 dm3 of oxygen and many dm3 of CO2 is produced?

63. College Physics

A 4.30 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 2.60 m, before compressing a spring of force constant 2.20 104 N/m. Find the maximum compression of the spring.

64. College Physics

A 4.30 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 2.60 m, before compressing a spring of force constant 2.20 104 N/m. Find the maximum compression of the spring.

65. math

On the way to school, Bobby noticed the school bus travels 8 miles north, then turns west and goes 6 miles to get to school. If there were a road that went straight from Bobby's house to school, how long the road would be?

66. APUSH

How have perspectives about health and conservation changed since the late 1800s?

67. Trig

To help a young tree grow straight, a gardener attaches three guy wires to it and the ground. She places the wires two feet below the top of the tree. If the wires are ten feet long and each makes an angle of 58 degrees with the ground. Find the height of

68. Physics

if mars orbits the sun at an angular velocity of 1.06x10-7 rad/s, how long is a year on mars in earth days assuming it travels in a circular orbit?pls explain

69. corporate finance

Your finance text book sold 45,500 copies in its first year. The publishing company expects the sales to grow at a rate of 20.0 percent for the next three years, and by 7.0 percent in the fourth year. Calculate the total number of copies that the publisher

70. physics

A sound registers 77.9 decibels on a detector. What is the intensity in W/m2? Assume the threshold of human hearing is 1.0×10-12 W/m2. Give your answer in picowatts/m2. 1 pW = 1×10-12 W/m2

71. physics

An object of mass 1.6 kg is dropped from a height of 2.9 metres. It lands with a speed of 2.8 m/s. How much energy was lost due to air resistance? (Give your answer to 2 s.f., expressed as a magnitude)

72. Math

Mark bought 54 cm of lace and 2m 45cm of black lace. How much total lace in meters did he buy?

73. posibility

One problem encountered by developers of the space shuttle program is air pollution in the area surronding the launch site. Acertain direction from the launch site is considered critical in terms of hydrogen chloride pollution from the exhaust cloud. It

true or false Arbitration and grievance procedures have done virtually nothing to prevent chaos and disorder in labor relations.

Labor’s membership stagnation in the last half-century can be explained by several formidable obstacles. Explain

76. alebra

how do i simplify 3m+n/4n^2m + 3m +n +5/4n^2m

77. College Physics

A 4.30 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 2.60 m, before compressing a spring of force constant 2.20 104 N/m. Find the maximum compression of the spring.

78. ELA (QUICK QUESTION)

i need some postive and negative aspects of schools. i need help starting my intro can you help me thanks

79. Math

Here's a frequency distribution table for the speeds of a sample of automobiles. Speed(MPH) Frequency Midpoint(I found) 50-54 2 52 55-59 4 57 60-64 5 62 65-69 10 67 70-74 9 72 75-79 5 77 I am trying to find the variance but whatever I do I can't seem to

80. math

solve -4+7logx=10 & log(x+3)+log(x-2)=log14

81. math

Dane is three years older than twice his brother's age,(b). Which algebraic expression below represents Dane's age? A. b+3 B. 2b+3 C. 3-2b D. 2b-3 I think the answer is C.

82. math

Daniel's bonus at work this year is \$1000.00 added to 20% of his yearly salary. If X represents his yearly salary, which of the following algebraic expressions should be used to figure the amount of his bonus? A. 0.2(1000+x) B. 1000+x/0.2 C. 0.2x+1000 D.

83. math

Earl cuts lawns in his neighborhood. He can cut 1 lawn in 45 minutes, and he gets paid \$9.00 per lawn. What is his rate of pay per hour?

85. history

cause: british impressed american sailors Whats a effect?

86. history

is late neo indians nomadic or sedentary?

87. Alg2

The tangent to a circle may be defined as the line that intersects the circle in a single point, called the point of tangency. If the equation of the circle is x^2 + y^2 = r^2 and the equation of the tangent line is y = mx + b, show r^2(1 + m^2) = b^2

88. math

need help Tweleve is sixteen less than four times a number.

89. Algebra 2

Before I go on and give you the problenms let me explain. i am not some lazy kid trin to get people to do my homework over the internet. I am freshman that just recently skippeda garde in math and I need some help. The problems below are from my pop quiz

90. algebra

A homeowner wishes to insulate her attic with fiberglass insulation to conserve energy. The insulation comes in 40-cm wide rolls that are cut to fit between the rafters in the attic.if the roof is 7 m from peak to eave and the attic space is 3 m high at

91. Chemistry

How many mL of 0.0257 N KIO3 would be needed to reach the end-point in the oxidation of 34.2 mL of 0.0416N hydrazine in hydrochloric acid solution

92. Math

Sarah had got 40 out of 50 questions right. What is the percentage of questions Sarah got right? Explain and show your work.

93. Physics

A car travelling at 90 km/hr sounds it horn as it approaches a stationary cyclist.if the car horn is at 512 Hz and temperature of air is 10 degree centigrade, what is the frequency of the sound waves reaching the cyclist as car approaches.

94. physics

Calculate the speed of a wave in m/s along a taut string with tension 139 Newtons and a mass per unit length of 3.6 grams per metre.

95. Physics

A system gains 473J of kinetic energy while losing 271J of potential energy. The thermal energy increases by 127J . Use an energy bar chart of this process to find the external work Wext.

96. Algebra

How do I solve: One leg of a right triangle is 4 m longer than the other. If the length of the hypotenuse is 18 m, how long are the other two legs?

97. Math 102

What number must be added to the numerator and subtracted from the denominator of 10/23 to obtain a fraction equivalent of 6/5? Please provide step by step, this is a word problem for rational expressions. Thank you

how sympathetic are you to the statement of a former general motors chairman that offering a union leader a seat on GMs board of directors made "as much sense as having a member of GM's management sitting on the board of an international union?" Explain. I

do you believe that public employees should be able to employ collective bargaining for wage increases or should the ‘free market’ continue to dictate wages in the public sector? Why or why not?