# timmy

Most popular questions and responses by timmy
1. ## chemistry

In the reaction between formic acid (HCHO2) and sodium hydroxide, water and sodium formate (NaCHO2) are formed. To determine the heat of reaction, 75.0 mL of 1.07 M HCHO2 was placed in a coffee cup calorimeter at a temperature of 20.8 °C, and 45.0 mL of

2. ## physics

The body in Fig. 10-37 is pivoted at O. Three forces act on it in the directions shown: FA = 13 N at point A, 6.4 m from O; FB = 17 N at point B, 3.6 m from O; and FC = 15 N at point C, 2.2 m from O. Taking the clockwise direction to be negative, what is

3. ## Chemistry

A weather balloon is inflated to a volume of 26.2 L at a pressure of 755 mmHg and a temperature of 32.5 ∘C. The balloon rises in the atmosphere to an altitude where the pressure is 360. mmHg and the temperature is -13.5 ∘C. Assuming the balloon can

4. ## science

how many grams of copper sulfate pentahydrate (CuSO4 5H2o) would you heat to produce 29.8 grams of water?

5. ## AP Chemistry

1.A compound consists of 65.45% C, 5.492% H, and 29.06% O on a mass basis and has a molecular mass of 110 g/mol. Determine the molecular formula of the compound. 2. What is the formula weight of iron (II) sulfate? Answer in units of g/mol. 3. What is the %

6. ## economics

perfectly competitive industry. Each firm having identical cost structures. long-run average cost is minimized at an output of 20 units. Minimum average cost is \$10 per unit. total market demand is Q=1500-50P. What is the long-run equilibrium price? Total

7. ## Math

A cylindrical tin can has a radius of 4.5cm and a height of 5 cm (a)What is the surface area of the can (b)What is its volume? (c)What is the cans capacity could somebody please answer this question so i can get past with math

8. ## physics

3 points particles with masses 4kg,2kg,3kg are at the corners of equilateral triangle of side m =2m.

9. ## Calculus

An inverted conical tank is 3m tall and 1m in diameter at its widest point. The water is being pumped out of a spout 2m above the top of the tank. Recall that the density of water is  = 1000kg/m^3 (a) Find the work needed to empty the tank if it is full.

10. ## Math

A ball has a radius of 56mm a)Calculate the surface area b)what is the volume of the sphere could somebody please answer for my math homework I need help

11. ## physics

A round pipe of varying diameter carries petroleum from a wellhead to a refinery. At the wellhead the pipe's diameter is 56.3 cm (0.563 m) and the flow speed of the petroleum is 13.5 m/s. At the refinery the petroleum flows at 5.65 m/s. What is the volume

12. ## chem 2

methylamine is a weak base. calculate the pH of a .025 M solution of methylamine.

13. ## precalculus

find the additive inverse of the number 6- pi and -7

14. ## chemistry

a sample consisting 22.7g of a nongasous unstable compound X is placed inside a metal cylinder with a radius of 8Cm and a piston is carefully placed on the surface of the compound so that for all practical purposes the distance between the bottom of the

15. ## algebra/math

Find the smallest value of x such that x^2+6x + 9 = 24 Please help me! I am very confused. Thank you!

16. ## Physics

An Olympic diver performs a dive from the 10 m platform and achieves a speed of 14 m/s just before entering the water. Neglecting air friction, approximately how many times larger the diver’s speed than the diver would have achieved by performing from a

17. ## Physics

On vacation, your 1350 kg car pulls a 540 kg trailer away from a stop light with an acceleration of 2.20 m/s2. (a) What is the net force exerted by the car on the trailer? (b) What force does the trailer exert on the car? (c) What is the net force acting

18. ## math

The roof of a building is shaped like a square pyramid, with a base of 18m by 18m. If the slant height of the roof is 12m and roofing costs 5.75m2, how much will it cost for roofing material? This is the last question for my homework could u answer this

19. ## chemistry

Calculate the value of DHo for the reaction 2 CH4 (g) -> C2H6 (g) + H2 (g) given the following thermochemical equations: C2H2 (g) + H2 (g) -> C2H4 (g) delta = – 175.1 kJ C2H6 (g) -> C2H4 (g) + H2 (g) Delta = + 136.4 kJ C2H2 (g) + 3 H2 (g) -> 2 CH4 (g)

20. ## geometry

Given: M is the midpoint of line segment PQ and line segment RS. Prove: line segment QR is congruent to line segment PS.

21. ## microeconomics

This is what I have, qi=20, AC(average cost)=10, and (total market demand) Q=1500-50p. What is the industry's long-run supply schedule?

22. ## science

The two sources of new materials involved in geologic processes are: magma soil erosion products deltas

23. ## chemistry

A graduated cylinder contains 17.0 mL of water. What is the new water level after 31.6 g of silver metal with a density of 10.5 g/mL is submerged in the water

24. ## Chemistry

The initial temperature of a bomb calorimeter is 28.50°C. When a chemist carries out a reaction in this calorimeter, its temperature decreases to 27.45°C. If the calorimeter has a mass of 1.400 kg and a specific heat of 3.52 J/(g°C), how much heat is

25. ## math

The roof of a building is shaped like a square pyramid, with a base of 18m by 18m. If the slant height of the roof is 12m and roofing costs 5.75m2, how much will it cost for roofing material?

26. ## Physics

A tennis player places a 64 kg ball machine on a frictionless surface. The machine ﬁres a 0.051 kg tennis ball horizontally with a velocity of 36 m/s toward the north. What is the ﬁnal velocity of the machine? Answer in units of m/s

27. ## Rounding#'s

use a calculator to find each rounded to 4 decimal places. 1) sec 15.2 degrees 2) an acute angle theta if csctheta= 1.38

28. ## physics

What is the absolute pressure at the bottom of a storage tank of oil 18-m deep that is open to the atmosphere? Take the density of oil to be 800 kg/m3.

29. ## Chemistry

A sample of naphthalene (C10H8) that has a mass of 0.7200 g is burned in a bomb calorimeter. The mass of the calorimeter is 1.580 kg, and its specific heat is 2.55 J/(g°C). As a result of the reaction, the temperature of the calorimeter increases from

30. ## chemistry

Which of the following equations represents a reaction for which the delta H can be called a standard enthalpy of formation, delta Hf? a) FeO(s) + CO2(g) -> FeCO3(s) b) 1/2 N2(g) + 2 O(g) -> NO2(g) c) 2 Na(s) + Cl2(g) -> 2 NaCl(s) d) Ba(s) + N2(g) + 3

31. ## algebra1

how do you figure out this answer.15.6+xforx=-17.9

32. ## Is anyone here a chemistry genuis?

The formate ion, (CHO2-), is related to the acetate ion and forms ionic salts with many metal ions. Assume that 9.7416 g of M(CHO2)2 (where M represents the atomic symbol for a particular metal) are dissolved in water. When a solution of 0.200 M sodium

33. ## MATH

THE FRIST TERM OF AN A.P IS EQUAL TO TWICE THE COMMON DIFFERENCE D FIND IN TERM OF D THE 5TH TERM OF THE A.P

34. ## Marketing

Good marketing managers know that A.marketing strategies can't influence consumer "wants." B.marketers can't create internal drives in consumers C.it is not that difficult to develop a marketing strategy that gets consumers to do what they don't want to

35. ## Marketing

The goal of target marketers is to develop unique marketing strategies that find unsatisfied customers to whom they can then offer superior value through more attractive marketing mixes. True or False I pick true please check my answer.

36. ## Math

Write the equation of the line in the indicated form that meets each criterion below. A. A line with a slope of -2/3 and a y-intercept of 4; in slope-intercept form B. A line with a y-intercept of – 2 and an x-intercept of 3; in standard form C. A line

37. ## Physics

A 0.15 kg baseball is moving at 35 m/s toward home plate when it is hit with the bat. The ball is in contact with the bat for 0.0019 s, and leaves the bat at 25 m/s directly away from home plate. Determine the average force exerted by the bat on the ball.

38. ## geometry

Triangle PQR has vertices P(0,12) Q(7,11) ans R(-2,2) Find the eaquation of the triangles median through point Q

39. ## math

Bronze cocnsists of 6 parts tin to 19 parts cooper. How amny pounds of tin are there in a 500 lb. bronze statue? What is the formula for getting the answer?

40. ## MATH

Jenna always throws loose change into a pencil holder on desk and takes it out every 2 weeks. this time it is all nickels and dimes. There are 7 times as many dimes as nickels and the value of the dimes is \$6.50 more than the value of the nickels. How many

41. ## math

Numbers that are palindromes read the same forward and backward. For example, 30203 is a five digit palindrome. If a single number is chosen randomly from the set of all three-digit numbers, find the probability that it will be palindromic. Answer 1/10??

42. ## finance math

A car dealer purchased 2 cars, one for \$1500 and the other for \$20000, He then sold the first car at a loss of 14% and the second car for a profit of 15%. Find the dealer¡¯s profit for the whole transaction and express the answer as a percentage of his

43. ## physics

A student laying on a building 54.0 m high shoots a pellet gun horizontally. If the pellet lands 156 m form the base of the building, what was the muzzle velocity of the gun?

44. ## Hard Calculus

f(x)= xsquared -2x for y= absolute value of f(x) does the derivitive exist at x=0 and explain why.

45. ## chemistry

in a lab experiment to obtain the molar mass of a voltaile liquid, the following data is obtained: volume of flask=225ml mass of flask=77.834gms mass of flask+gas=78.416gms temperature=100 degrees celsius pressure=714 torr What is the molar mass of the

46. ## Math

Andre left his campsite and paddled to a fishing hole 1.5 km downstream. He timed his trip and found that it took him 9 min, His return trip upstream took him 22.5 min. Determine the speeed at which he paddled and the speed of the river? what steps did u

47. ## Organic Chemistry

How many moles of hypochlorous acid are needed to react with 0.621 mol of 9-fluorenol? please help

48. ## English

Pronoun case for who and whom 23a. Jon Bon Jovi, who is a well-known singer and actor, also owns an arena football team. 23b. Jon Bon Jovi, whom is a well-known singer and actor, also owns an arena Please what is the correct answer? I chose (A).

49. ## Math

The average debt for juniors exceeds the debt for sophomores by \$ 458\$458​, and the average debt for seniors exceeds the debt for sophomores by \$1165. The combined debt for a​ sophomore, a​ junior, and a senior is \$6543. Determine the average debt

50. ## Yoruba

There is no animal without plant,there is no plant without water,there is no cloud without the sun,the sun is essential

51. ## Chemistry

Homework question? Colmanite [Ca2B6O11 * 5 H20] is a salt whose boron content gives glass high clarity. You are a buyer for an optical fiber manufacturer and want pure material. You have just received a Certificate of Analysis for a lot that is 12.8 +-

52. ## Elementary Stats

A box contains two red balls, four green balls, and two white balls. You extract balls from the box with replacement 100 times. Eachh time you extract a red ball, you win \$1; a green ball, you lose \$0.50; a white ball, nothing happens. -Make a box model of

53. ## math

Determine the number of odd, nonrepeating three digits numbers that can be written using digits from the set {1, 2, 3, 4}.

54. ## Math

There are 9 boys and 12 girls at a party,everyone is wearing a pair of shoes.How many shoes are there

55. ## Math

Fun video rents videos for \$1 per video plus chafes a \$5 membership fee. Your equation should represent the total cost for renting any number of videos. write an equation Function Table

56. ## math

i don't know but the question is to circle the object that is heavier(shoe,sock,feather,marble,brick and tape measure)i know a brick,and the tape measure is heavy but i'm not sure about the shoe and the marble

57. ## Physics

A man (80kg) jumps from a 17 storey balcony (51 metres). How long would it take for him reach the ground? ~Sorry for the morbid example, we were just having a chat about it lol

A leaky faucet fills a 100 millimeter cup in 10 minutes. 1.how much water is wasted in a day?a week?a non leap year? 2.How long does it take to waste a kiloliter of water? (hint:1 kiloliter=1000000 milliliters)

59. ## social studies

hello, my homework page starts out with In 1979, muslim fundalists led a successful rebellion against the united states-backed shah of iran and took control of that country? my question is what country? i think the paper printed wrong were doing 1979

why does a tennis ball go furthur than a beach ball? force and motion question

61. ## web 1

what do most virtual encyclopedias require after a trial period

62. ## MATH

What is the area of the region bounded by the lines x=1 and y=0 and the curve y= x-e^x^2? A. 1-e units squared B. e-1 units squared C. (e-1)/2 units squared D. (1-e)/2 units squared or E. e/2 units squared if you can show me how to get that please

63. ## ?

what happens the first time that buck answers the call of the wild? http://www.sparknotes.com/lit/call/ =)

64. ## Maths

Factorise 25k^2-20+(4/k^2)

65. ## Yoruba

Please help me translate : it burns the leaves,it dries the roots,it wither the flower,yet it is very useful

66. ## Algebra

Find an equation of variation in which y varies jointly as x and z, and y=4 when x=4 and z=1. Simplify

67. ## Science

What might be the functions of the chemical additives in body washes?

68. ## chemistry

what is thiosulphate

69. ## Chemistry

why is chemistry needed

71. ## Writing

What are the five features of a letter.

72. ## math

is a marble heavy more than 1 pound

73. ## physics

A teacher is shot out of a cannon. He leaves the barrel at an angle of 25.0o to the ground with a velocity of 45.0 m/s. How far down range will he land?

74. ## physics

A teacher is shot out of a cannon. He leaves the barrel at an angle of 25.0o to the ground with a velocity of 45.0 m/s. How many seconds will the teacher be in flight?

75. ## physics

A teacher is shot out of a cannon. He leaves the barrel at an angle of 25.0o to the ground with a velocity of 45.0 m/s. What is the maximum height the teacher will reach in his flight?

76. ## physics

A teacher is shot out of a cannon. He leaves the barrel at an angle of 25.0o to the ground with a velocity of 45.0 m/s. What is the teacher's horizontal velocity?

77. ## math

change ratio to lowest terms.

78. ## Hard Calculus

f(x)= xsquared - 2x Determine whether y= f(IxI) is continous at x= 0 justify your answer

79. ## social studies

sorry to bother you again what does secular mean

80. ## Math

If a mixture requires 2 parts water to 3 parts of alcohol what percentage of mixture is water. How do I work this problem?

81. ## precal

solve cos(squared)x + sinx = 1 {0, 2pie)

82. ## Math

A train that is one mile long starts through a tunnel that is also 1 mile long. the train is traveling 15 miles per hour. how long does it take for the train to get completely through the tunnel?

83. ## Criminal law

"self induced intoxication negates mens rea, hence no crime is committed" justify the statement.

1. ## English

BBB. 100%

posted on March 28, 2019
2. ## English

play nice

posted on March 21, 2019
3. ## math

I suggest you use brainly.com

posted on March 14, 2019
4. ## math

4 1/6 cups of almonds remaining.

posted on December 4, 2018

^^ There right

posted on October 18, 2018
6. ## calculus

posted on May 30, 2018
7. ## Chemistry

I'm not 100% sure, but I believe that it is dealing with the electronegativity. to determine the type of bond a molecule has, you use the electronegativity. You take the higher electronegativity and subtract the lower electronegativity. if the value is

posted on March 22, 2018
8. ## AP Literature

yeah they're wrong...took the test on my own and found that i got an A

posted on January 17, 2018
9. ## language arts

SHLONG DADDY IS 100% CORRECT THANK YOU SO MUCH A C D

posted on January 16, 2018
10. ## algebra

^?

posted on December 12, 2017
11. ## Social Studies

i hate scammers

posted on June 2, 2017
12. ## social studies

I Only Use Jishka When My Grades Are Low So Please Dont Put Fake Asnwers

posted on June 2, 2017
13. ## Grammar

The goal of target marketers is to develop unique marketing strategies that find unsatisfied customers to whom they can then offer superior value through more attractive marketing mixes. True or False

posted on May 27, 2017
14. ## Yoruba

I mean translate to yoruba Please

posted on January 23, 2017
15. ## Math

How the crap do i do this.

posted on December 13, 2016
16. ## Physics

the angular speed, or 4pi

posted on November 10, 2016
17. ## Math

21

posted on October 2, 2016