1. Chemistry

Calculate the pH and the pOH of an aqueous solution that is 0.025 M in HCl(aq) and 0.075 M in HBr(aq) at 25°C.

2. Chemistry 120

* If 13.3 kilograms of Al2O3(s), 58.4 kilograms of NaOH(l), and 58.4 kilograms of HF(g) react completely, how many kilograms of cryolite will be produced? * Which reactants will be in excess? *What is the total mass of the excess reactants left over after

3. chemistryy

Identify the solute with the highest van't Hoff factor: Non-electrolyte, NaCl, MgCl2, FeCl3, MgSO4

4. Physics

To create artificial gravity, the space station shown in the drawing is rotating at a rate of 1.60 rpm. The radii of the cylindrically shaped chambers have the ratio rA/rB = 3.00. Each chamber A simulates an acceleration due to gravity of 9.60 m/s2. Find

5. Chemistry

How would the calculated molarity of KMNo4 be affected when KMno4 is added to rapidly and too much KMnO4 is added, overshooting the endpoint.

6. Physics

A force F = (5i − 4j) N acts on a particle that undergoes a displacement Δr = (5i+j)m . (a) Find the work done by the force on the particle. (b) What is the angle between F and Δr?

7. algebra

A total of \$12,000 is invested in two funds paying 9% and 11% simple interest. If the yearly interest is \$1,180, how much of the \$12,000 is invested at each rate? We have two unknowns: the amount of money invested at 9% and the amount of money invested at

8. chem

The complete combustion of octane, C8H18, the main component of gasoline, proceeds as follows. 2 C8H18(l) + 25 O2(g) ¨ 16 CO2(g) + 18 H2O(g) Octane has a density of 0.692 g/mL at 20‹C. How many grams of O2 are required to burn 26.5 gal of C8H18? i

9. Statistic

I’m having problems creating the flow chart, so I am unable to insert the numbers. This is what I have done this far, and I’m not sure if I’m accurate with the calculations. (1) A school cafeteria is operated by five persons performing the activities

10. Physics

A circular hole in an aluminum plate is 2.725 cm in diameter at 0.000 degrees celsius. What is its diameter when the temperature of the plate is raised to 100.0 degrees celsius?

11. world history

1. Which of the following were major items of trade in the West African states of Ghana and Gao? A. Bananas and copper B. Cacao beans and slaves [C. Gold and salt] D. Coffee and sugar

12. physics

The mass of a roller-coaster car, including its passengers, is 481 kg. Its speed at the bottom of the track in the figure below is 20 m/s. The radius of this section of the track is r1 = 24 m. Find the force that a seat in the roller-coaster car exerts on

13. College Physics

Suppose the Eskimo is pushing the same 50.0-kg sled across level terrain with a force of 51.5 N. If he does 3.85 102 J of work on the sled while exerting the force horizontally, through what distance must he have pushed it?

14. CHEMISTRY

CALCULATE DELTA G FOR REACTION Cu2(aq)+2Ag(s) gives Cu(s)+2Ag(aq) Given, E0 Ag+/Ag=0.80 v and E0 Cu2+/Cu=0.34 V

15. chemistry

A 5.000 g sample of a mixture which contains MgCO3 and sand (SiO2) was heated for 2.30 hours until no further reaction occurred. It was then cooled and the residue, which contained MgO and unchanged sand, was weighed. The reaction is: MgCO3(s)  MgO(s) +

16. PHY 101

A 0.425-kg blue bead slides on a frictionless, curved wire, starting from rest at point where h = 1.50 m. At point , the blue bead collides elastically with a 0.675-kg green bead at rest. Find the maximum height the green bead rises as it moves up the

17. science

a star has a size of 0.1 solar radius. How many times larger is the sun than this star

18. Math

The Lions Gate bridge in Vancouver is a suspension bridge. The main span between the two towers, is 427m long. Large cables are attached to the ends of the both towers, 50m above the road. Each large cable forms a parabola. The road is suspended from the

19. Chemistry

Uhmmm.. I am totally lost! Help? There are 7.0 x 10^6 red blood cells in 1.0 mm^3 of blood. How many red blood cells are in 1 L of blood?

20. chemistry

The first ionization energy of a hydrogen atom is 2.18 aJ. Assuming the ionization efficiency is 82%, how many such photons are needed to 1.00 * 10^16 atoms?

21. Chemistry

How would the calculation percent of oxalate of the unknown affected when weighting out the unknown solid the actual mass is .758 grams however the mass is mistakenly recorded as .785 grams

22. Health

Explain five personal characteristics or life situations that promote good fitness, health, and wellness. Include in your answer reasons that support these as being beneficial to lifetime fitness.

23. world history

2. In forming his government, Asoka recruited what group to serve as bureaucrats? A. Traditional Brahman elites [B. The Buddhist clergy] C. The military elite D. The rising merchant class

24. Sociology

Did I choose the correct answer #3 In the mid- to late 1880s, the United States experienced a surge in immigrants from 1)Japan and Cuba. 2)China, Japan, and Mexico. 3)China and Japan < I chose this one< 4)China and Canada.

25. world history

7. In the development of the Roman Empire, the Romans treated citizenship as A. a benefit worthy only of peoples who had freely joined them. [B. belonging only to native Romans.] C. meaningless because the Roman Empire was tyrannical. D. something to be

26. Physics

An 855-kg race car can drive around an unbanked turn at a maximum speed of 61 m/s without slipping. The turn has a radius of curvature of 165 m. Air flowing over the car's wing exerts a downward-pointing force (called the downforce) of 10900 N on the car.

27. chemistry

A sample being given as a laboratory unknown is a mixture of calcium carbonate and magnesium carbonate. Both substances decompose to form calcium oxide and magnesium oxide, respectively, when heated at a high temperature for a prolonged period. An unknown

28. Physics

A 4 kg block slides down a rough inclined plane inclined at 30° with the horizontal. Determine the coefficient of kinetic friction between the block and the surface if the block has an acceleration of 1.2 m/s2.

29. Language Art

You can explore, with a minimal time commitment, an interest, hone a skill, or participate in an activity. If you rewrote sentence 3 beginning with With a minimal time commitment, the next words should be 1. to be exploring 2. you can explore 3. an

30. Physics

If a particle moves with velocity V PA = (2.0 m/s) + (4.0 m/s) relative to frame A, what is the velocity V AP of the frame relative to the particle? a. -(2.0 m/s) + (4.0 m/s) b. -(2.0 m/s) - (4.0 m/s) c. (2.0 m/s) + (4.0 m/s)

31. Algebra

A builder has 80 feet of fencing to create an enclosure adjacent to a long existing wall. He will use the wall for one side and the available fencing for the remaining three sides. If the sides perpendicular to the wall have length x feet, which of the

32. Math

A store mixes Brazilian coffee worth \$10 per kilogram and Turkish coffee worth \$12 per kilogram. The mixture is to sell for \$11 per kilogram. Find out how much of each should be used to make a 216 kilogram mixture.

33. Statistics 2231

12.05 A study of the students taking distance learning courses at a university finds that they are mostly older students not living in the university town. Choose a distance learning student at random. Let A be the event that the student is 25 years old or

34. Math

Please find the next THREE numbers in the patterns and explain how you got them: 1) 5, 5/2, 5/4, 5/8, 5/16.... 2) 1, -3, 9, -27, 81... 3) 1/2, 1/2, 3/8, 1/4, 5/32... 4) -9, 101, -999, 10001, -99999...

35. Chemistry

A sample of metal has a mass of 1.75 kg and a specific heat of 0.115 cal/g oC. What is the temperature change of the metal after 625 calories of heat are added? My answer is 3 oC. Just want to make sure is right and my equation is set up right.

36. Chemistry

You have made a bet with a friend. You tell them that you can eat one mole of M&Ms in a year, if you eat one M&M every second for three hours a day, 7 days a week, for 365 days in that year. Can you win the bet? Calculate how many years it would really

37. german

Think of a funny cartoon that you like. Choose a character or two from that cartoon and write 3-5 sentences telling what those characters did in the cartoon you watched. Use the simple past verb tense to write your sentences. ****I was thinking about doing

38. math

Sanjeev is twice as old as his son.If after four years he will be four times as old as his son was 9 years ago ,how old is each now ??

39. chemistry

The imaginary compound calcium nortonate, CaNtO4, is 54.698% nortonium, Nt, by weight. Calculate the percent, by weight, of potassium in potassium nortonate to four significant digits.

40. physics

A tennis ball with a velocity of +9.6 m/s to the right is thrown perpendicularly at a wall. After striking the wall, the ball rebounds in the opposite direction with a velocity of -5.8 m/s (to the left). If the ball is in contact with the wall for 0.013 s,

41. math

the age of somya and yaseen are in the ratio 5:7.if somya were 9 years older and yaseen is 9 years younger one,find thier present age?

42. pre-calculus

solve the following logarithmic equation. Be sure to reject any value of x that is not in thedomain of the orginal logarithmic expression. Give the exact answer. log3(x+8)=4 The three actually drops down a little below the g. Can someone tell me how to do

43. grammar

several lab studies are being performed because its or it's necessary for appropriate treatment. which its or it's should be used.

44. world history

11. Which of the following is not one of the new thoughts of or about God that were formulated in the Axial Age? A. Many Gods B. Divine God [C. Single God] D. Involved God

45. Physics

2. A person would like to jump over a river using a motorcycle and a ramp. The frictionless ramp is inclined at an angle of 42.5 degrees, has a length of 52 meters, and the motorcycle's engine produces a constant force of 915 Newton’s directed up the

46. Physics

what is the force that a jet pilot feels against his seat as he completes a vertical loop that is 500 m in radius at a speed of 200 m/s? Assume his mass is 70 kg and that he is located at the bottom of the loop.

47. Physics

A 2.285 kg object is held in place on an inclined plane that makes an angle of 40 degrees with the horizontal. The coefficient of static friction between the plan and the object is 0.552. A second object that has a mass of 4.75 kg is connected to the first

48. CHEMISTRY! HELP!

I have a hard time getting this someone help me? Astronauts often use the unit light year to express intergalactic distances. If light travels 3.00 x .10^10 cm/s and one year is defined as 365 days, how many kilometers does light travel in one year?

49. science

what are some physical properties of stars

50. Physics

A satellite is in a circular orbit about the earth (ME = 5.98 1024 kg). The period of the satellite is 3.70 104 s. What is the speed at which the satellite travels?

51. Physics

The large blade of a helicopter is rotating in a horizontal circle. The length of the blade is 5.2 m, measured from its tip to the center of the circle. Find the ratio of the centripetal acceleration a1 at the end of the blade to the centripetal

52. statistics

1. The exam scores for the students in an introductory statistics class are as follows. 88 63 90 64 82 98 96 75 89 86 76 84 70 67 34 89 85 39 81 96 92 85 a. Compute the mean and the median score. b. Identify the shape of the distribution of score. Explain

53. peripheral nerves

How do the functions of the two groups of peripheral nerves differ?

54. chemistry

How many photons are produced in a laser pulse of 0.324 J at 631 nm?

55. Physics (Kinematics)

A ball is thrown 83.3 m upward and then falls back to earth.Neglecting air resistance, how long will it be in the air? The acceleration of gravity is 9.8 m/s2 . Answer in units of s

56. Physics

A boater wants to head straight across a river that has a current of 3km/hr. If the top speed of the boat in still water is 4km/hr, find the direction the boat must travel into the current to go straight across the river. How fast is the boat going

57. physics

A ball thrown vertically upward has an upward velocity of 5.68 m/s at a point 11.9 m above where it was thrown. How long does the ball take to reach that point?

58. trignometry

show that cos2x=1-tan^ 2 x /1+tan^2x=2cos^2x-1

asked by help me out it's urgent
59. mathematics

there are two wooden square prisms with base edge 8cm and height 12cm.from one of this prism ajesh curved outthe largest square pyramid.but from the otherrajesh curved out the largest cone.find the volume of the solids they curved out.whose product has

60. physics!!

An 8.82g bullet is fired into a 235g block that is initially at rest at the edge of a table of h = 1.05 m height (see the figure below). The bullet remains in the block, and after the impact the block lands d = 2.16 m from the bottom of the table.

61. world history

3. What geographic feature at times made life difficult for the Moche of South America? A. Mountains [B. Desert] C. Lack of access to the sea D. Unpredictable rivers

62. world history

6. After its conquest by Alexander the Great, the government of the Persian Empire A. was transformed into a democratic monarchy. B. became a democracy. C. was ruled by a traditional Macedonian monarchy. [D. was maintained more or less intact.]

63. english

2. According to the Pardoner, what is the best way to collect money from people? (1 point) appealing to their sense of piety openly condemning avarice and greed scaring them with prospects of divine punishment

64. Precalculus

I have a diagram that has 4 rectangular corrals joined together and a barn above it. Fencing is not needed along the back wall of the barn. The perimeter is 200 ft and the question asks... If each corral is 16 ft. long (front to back) how wide will each

65. math

An open box is made from a rectangular piece of cardboard, with dimensions of 24 cm by 30 cm, by cutting congruent squares from each corner and folding up the sides. Determine the dimensions of the squares to be cut to create a box with a volume of 1040 cm

66. physics

While standing on 3rd street you hear an approaching ambulance. Its siren oscillates in frequency between about 650 Hz and 750 Hz. Later on as you near your destination, you come upon the scene of the accident. The now-stationary ambulance runs its siren

67. chemistry

To resolve an object in an electron microscope, the wavelength of the electrons must be close to the diameter of the object. What kinetic energy must the electrons have in order to resolve a protein molecule that is 8.10 nm in diameter? Take the mass of an

68. Chemistry

If the Kb of a weak base is 2.6 × 10-6, what is the pH of a 0.24 M solution of this base?

69. English

I'm a 7 Letter Words, You Read me daily, My 5, 6, 7th Letter increases every Year. 3rd and 4th Letter are the Same. My 3rd, 2nd and 5th Letter Covers 75% of the World. What am i?.

70. math

Of 55 students in the fifth grade, 43 are fans of the local basketball team and 35 are fans of the local hockey team. Twenty - three students are fans of both teams. How many students are fans of the hockey team but not the basketball team?

71. maths

can you help me with this? cos2A=cossquareA-sinsquareA/cossquareA+sinsquareA=cossquareA(1-tansquareA)/cossquareA(1+tansquareA) I encountered this situation while solving trignometric problem.can you tell how does this come?

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72. chem 2

The boiling point of an aqueous 1.83 m salt solution is 102.5°C. Determine the value of the van't Hoff factor for this solute if the Kb for water is 0.512°C/m.

73. math

write 718.5 in scientific notation

74. science

Explain why the temperature of water might increase when a solution forms.

75. Math

For an experiement to test elastic collision, ball 2 was at rest and ball 1 was released from a certain height and distance and hit ball 2. A set of measurements were collected which was v1 and v2 prime for each ball. I need to calculate the kinetic energy

76. mathematics

what is the slantheight of the largest square pyramid that can be curved out from a wooden cube of side 12cm?find the lateral surface area of the pyramid so obtained?

77. chemistry

if u had used 40ml of water and 6g of ammonium nitrate ,rather than 20ml water n 3g ammonium nitrate. would u expect to get a larger,smaller or identical temp. change? why?

78. Physics

A satellite has a mass of 6135 kg and is in a circular orbit 3.80 105 m above the surface of a planet. The period of the orbit is 2.08 hours. The radius of the planet is 3.85 106 m. What would be the true weight of the satellite if it were at rest on the

79. Physics

On a banked race track, the smallest circular path on which cars can move has a radius of 119 m, while the largest has a radius 155 m, as the drawing illustrates. The height of the outer wall is 18 m. (a) Find the smallest speed at which cars can move on

80. pre-calculus

solve the following logarithmic equation. be sure to reject any value of x that is not in the domain of the original logarithmic expression. give the exact answer. then, use the calculator to obtain a decimal appromiation, correct to two decimal places,

81. Math

Al and Harpreet are racing to Wing Stop to get the last batch of fries made for lunch. Al participates in cross country and can cover (write in value) per minute. Harpreet likes to watch TV and play video games. She is out of shape and can only cover 3

82. pre-calculus

solve the exponential equation. express the solution in terms of natural logarithims. Then, use a calculator to obtain a decimal point approximation for the solution. e^x=12.3 What is the solution in terms of natural logarithims? The solution set is ?

83. history

Which of the following statements about President Andrew Johnson is true? A. He was raised under conditions of extreme poverty B. He was well educated, but he was a poor stump speaker. C. he was impeached and forced from office. D. He defended the planter

84. physical science

An object which is 0.52m tall is located 1.13m in front of a plane mirror. How tall is the image as seen in the mirror?

85. world history

12. The Chinese philosopher Xunzi wrote that if a person attempted to cure rheumatism by beating a drum and sacrificing a pig to the gods, then the A. rheumatism wouldn't get better because proper therapy required playing a flute and sacrificing a chicken.

86. chemistry

I left out part of my question. This may make better sense. But I'm not sure of what he can be asking me to do with it. 75g of tartaric acid in one liter is used in a titration. What could he want me to find?

87. Geometry

if RS= 2x+2 and ST= 3x-2 and RT= 24, find the value of x. then find RS and ST

88. Biology

1. Creates energy in the form of ATP 2. The gel-like liquid that fills the cell 3. Sorts, packages, and sends out proteins 4. Helps the chromosomes divide faster in animal cells only 5. Creates food energy from sunlight energy 6. Responsible for digestion

89. Prealgebra

Identify the slope and y-intercept of the line with the given equation then graph the equation. Y=-2 * must use slope-intercept form

90. chemistry

To resolve an object in an electron microscope, the wavelength of the electrons must be close to the diameter of the object. What kinetic energy must the electrons have in order to resolve a protein molecule that is 8.10 nm in diameter? Take the mass of an

91. physics

While standing on 3rd street you hear an approaching ambulance. Its siren oscillates in frequency between about 650 Hz and 750 Hz. Later on as you near your destination, you come upon the scene of the accident. The now-stationary ambulance runs its siren

Major Tire Company's plant in Charleston, South Carolina was destroyed when Hurricane Hazel hit the coast. The company officially closed the facility after reviewing the damage and terminated all 500 workers. The company did not give the employees 60 days

93. English

1. Fifty states make up the U.S.A. 2. Fifty states compose the U.S.A. 3. Fifty states comprise the U.S.A. 4, The U.S.A. is composed of fifty states. 5. The U.S.A. consists of fifty states. 6. The U.S.A. is made up of fifty states. (Are they all grammatical

select the statement which reflects the employer position on electronic monitoring

How do HMOs affect health care costs?

96. Chemistry

Calculate the amount (volume) of 0.135 M HClO4 solution required to neutralize 57.00 mL of .089 M NaOH

97. statistics

How do you calculate the degrees of freedom for unequal sample sizes and unequal variance (independent t test)

98. Math

A 5.0m ladder is leaning 3.1m up the wall. What is the angle the ladder makes with the ground? Would this be..... sinA=3.1/5.0 sinA=0.62 sin^-1=38degrees?

99. calculus

find the x coordinate of each point at which the line tangent to the graph of f(x)=x^4-3x^2 is parallel to the line y= -2x+4

100. Physics

A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 20.0 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 83.9 m), the block swings

101. Precalculus

Combined area of 1680ft^2 for 4 identical rectangular corrals. Corrals are joined together and no fencing at the back wall of the barn. 200=5d+4w 1680=4dw What length will produce the maximum area? d=12 The dimensions of each corral (lxw) is 12'x35' What

102. Social science

Social conflict, empowerment theory and feminist theory. How are the theories similar? How are the theories different? What are the implications for interventions and community development? Thank you, Ms. Sue

103. Calculus

Use implicit differentiation to find dy/dx. e^4x = sin(x+2y). This is a practice problem. It says the correct answer is 4e^x/(2sin(x+2y)) but I keep getting 4e^(4x)/(2cos(x+2y)). I thought the derivative of e^(4x) would be 4e^(4x), not 4e^(x). And I use

104. pre-calculus

the function f(x)=4/x-7 is one to one a. find the inverse of f b. graph f, f^-1, and y=x on the same set of axes find the inverse of f f^-1(x)=

105. world history

5. What religion, which had potentially universal appeal, was created by Gautama Siddhartha in India? [A. Buddhism] B. Hinduism C. Zoroastrianism D. Jainism

106. statistics

How is the standard error of the mean influenced by sample size and standard deviation?

107. world history

8. What strategy did Buddhist and Christian missionaries employ to spread their faith that Muslims didn't? A. Conversion of kings and other elite figures B. Use of artifacts C. Forceful conversion of others [D. Conversion of merchants]

108. Calculus

The linear approximation to 1/sqrt(3-x) at x=0 is y=

109. pre-calculus

solve the equation 1. In x + In (x+12) =2 x= ? or either there is no solution 2. solve the exponential equation 9^x=6 What is the exact answer? 3. Use transformations to indentify the graph of the function. Then determine its domain, range, and horizontal

110. math

a pipe is 2" outside diameter and it as 3/16" walls. What isthe inside diameter. could you explain in detail . Thanks

HI, MY dughter is studying 3rd grade.how to prepare Tsat test in math,english.can u tell me .can u send me links.Tennese state.that links is not working.can u send me another links

112. world history

13. _______ was the first thinker to postulate that numbers are real, not abstractions. A. Hui Shih [B. Pythagoras] C. Parmenides D. Aristotle

113. physics

a 4 kg mass is dropped on a spring below. the mass falls 2 meters before stopping and the spring compresses 40 cm in the process. what is the spring constant?

114. math

Of 30 runners surveyed ,23 go running in the morning and 15 go running in the evening . Seven of the runners surveyed go running in both the morning and the evening .How many runners go running in the morning but not the evening?

115. chemistry

certain electromagnetic wavelenght radiation has frequency of 98hz .what will be its wave lenght?

116. math

use : .# x 6 = minutes I did try to do it but came up with numbers like 5.732360456. Plz help P.S. Trying to help my son but can't 0.5 ='s how many hours and minutes 2.5 ='s how many hours and minutes 2.3 ='s how many hours and minutes 12.5 ='s how many

117. Algebra

Of 30 runners surveyed, 22 go running in the morning and 15 go running in the evening. Seven of the runners surveyed go running in both the morning and the evening. How many runners go running in the morning but not the evening?

118. Math

Ms. Sue, help me. I don't get the runners problem. Please i am helpless!!!

119. math

how to solve a quadratic equation in one variable ? plsss

121. Algebra

How do I solve 6/2x - 1 - 2/2x+1

122. physics

A car traveling 28 mi/h accelerates uniformly for 6.7 s, covering 555 ft in this time. What was its acceleration? Answer in units of ft/s 2

123. science

What happens when you burn magnesium metal using the big idea of energy?

124. African American

Amazing fact regarding African American in Randolph County

125. Chemistry

What is the moles of NaOH when molarity is .2744 125 mL flask Mass 9.398 Volume 29.90

126. African American

Amazing fact regarding African American in Randolph County

128. physics instrument

how to measure vernier caliper? tell me about least count in cm scale and vernier scale least count. how to find the vernier coincidence easily tell me some tips

129. sociology

To support a scientific hypothesis, one might (Points : 1)

What are some of the driving forces behind rising health care spending?

131. social studies

Treasure claims that her 6-month-old baby, Precious, can add and subtract small numbers of objects. Recent research on infants' understanding of numbers would: A. indicate that Treasure is nuts. B. prove that Precious can add and subtract up to 20 objects.

132. social studies

Results of Renee Baillargeon's sliding carrot research may suggest that object permanence: A. may not be present until much later than Piaget believed. B. may be present at a much younger age than Piaget thought. C. cannot be tested with

133. pre-calculus

Please diregard the other one the square root sign did not come out right. find the complete function f o g f(x)=x^2+1;g(x)= square root x-4

134. Math Statistics

I am stuck can someone help me 19.2 - 21.1 ---------- 3.18 \/25

135. pre-calculus

find the inverse of the following function. Find the domain, range, and asymptotes of each function. f(x)=3+1n(x+2)

136. algebra

John measures the dimensions of a roomto be 16.6ft times 15.23 ft. How many significant digits should he use when calculating the area of the room?

137. geometry

AB=2x+9,BC=4x-5

138. spanish

1. what does cuale son los dias de la escupla mean ? 2. what does cual es tu dias favorito de la semana mean ?

139. math

Sanjeev is twice as old as his son.If after four years he will be four times as old as his son was 9 years ago ,how old is each now ??

140. Social science

What are the implications for interventions and community development?

What key functions and incentives of HMOs affect costs?

142. chemistry

I don't know what he wants me to do with this. This is for extra credit and for good reason. It is way ahead of where we are in the text. This is all the information given. 75g of tartaric acid is used in a titration. What do I do with that?

143. algebra

M --- +. 5= -2 3.

144. Physics

A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 20 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 165 m), the block swings toward

145. Math

Algebra Find the value of 78 X n when n = 3,237.

146. pre-calculus

solve the equation (5/2)^2=(125/8) x=

147. geometry

Al and Harpreet are racing to Wing Stop to get the last batch of fries made for lunch. Al participates in cross country and can cover (write in value) per minute. Harpreet likes to watch TV and play video games. She is out of shape and can only cover 3

148. Math

The sum of the ages of Monica and her mother is 70. Monica is 4 less than 1/2 her mother's age. Find their ages. I've been trying to do this for the past 20 minutes. I think the question is wrong, but try for yourself. Help please!

149. pre-calculus

solve the equation 5^5x+1=125

150. pre-calculus

solve the logarithmic equation. be sure to reject any value of x that is not in the domain of the orginal logarithmic expression. In square root of x+2=2 (If I try to make the square root sign it will not come out right so I wrote it out instead) What is

151. Critical Thinking/Ethics

During the last full moon, the ratio to of male to female births was 1.1 to 1 in Toronto but 2.5 to 1 in Timmins, so the effect of the full moon on a baby`s gender is stronger in smaller towns. What is an alternative explanation for that?

152. pre-calculus

solve for the following exponetial equation. 1.4^x=(0.5)^-x What is the exact answer? A. x= b. There is no solution.

153. Chemistry

The mass of a single uranium atom is 4.70E-22 grams. How many uranium atoms would there be in 167 milligrams of uranium?

154. math

what is x in: 3.25 + 6x= 23.10

155. math

I still do not understand