# Questions Asked onSeptember 29, 2012

65. ## physics

Let the radius of the circular segment be 92 m, the mass of the car 2393 kg, and the coefficient of the static friction between the road and the tire 0.9. Find the magnitude of the normal force N which the road exerts on the car at the opti- mal speed (the

find a ratio equivalent to each ratio. then use the ratios to write a proportion 8/14 4/18.. I am so confused. Pleasse help me???? Thank ya'll.

67. ## chemistry

Ariel found the density of an unknown solid to be 24.3 g/cm3. Her teacher told her that something must have gone wrong with her measurements because her percent error was 30.0% too high. What was the actual or accepted density of her unknown solid?

68. ## Math Statistics

A sample has a mean of M = 25. If one person with a score of X = 25 is added to the sample, what effect will it have on the sample mean?

69. ## college algebra

how do I solve this: (17x^3-5x^2+4x-3)-(5x^3-9x^2-8x+11) and putting the resulting polynomial in standard form?

70. ## History

so i have to make a picture based on this Lesson where learning about New France an from the textbook there's this sentence i`m supposed to draw about but i have no clue how i can draw it its --> "reported to the king on colonial activities and ensured

91. ## health

For adults, which ranges below reflect an accurate BMI category? A. If your BMI is 30 or higher, it falls within the overweight category B. If your BMI is 18.5-24.9, it falls within the normal or healthy weight category C. If your BMI is less than 18.5, it

92. ## physics

An F-14 jet fighter flies horizontally at 200m/s at an angle of 30 degrees above the horizon when it drops parcel from 2400m above the ground. a) How long does it take the parcel to hit the ground? b) How far does the parcel travel in the x-direction, from

93. ## childcare

Discuss the responsibilities that a teacher has to volunteer parents when these parents are invited to particpate in learning activities. Include five responsibilties and an examplae of each

94. ## Compensation Management

Forrest just gave his assistant a 3% raise because his assistant just took on the responsibility of department budgeting. Which of the following policy choices did he make? The answer is eluding me...internal alignment, external competitiveness, management

95. ## Physics

an ambulance starts its motion from rest at a hospital and accelerates at a rate of 1.60 m/s^2 for 14.0 s. after that, it travels at constant speed for 70.0 s, and it the slows down at a rate of 3.5 m/s^2 until it stops (vf=o m/s) at the accident seen.

96. ## physics

A car starts from rest and travels for 5.6 s with a uniform deceleration of 1.3 m/s 2 . What is the ﬁnal velocity of the car? Answer in units of m/s I know the answer for this is -7.28 but I cant figure out how to the second part. How far does the car

97. ## Math

Suppose f and g are continuous functions such that g(3) = 2 and the limit as x approaches 3 of [3f(x) + f(x)g(x)] = 15. Find f(3).

98. ## Chemistry

The rate constant for a certain reaction is = 8.00×10−3 . If the initial reactant concentration was 0.400 , what will the concentration be after 16.0 minutes?

99. ## stor

Suppose that you flip a fair coin (P(H)=P(T)=1 2 ) three times and you record if it landed on heads, H, or tails, T. (a) What is the sample space of this experiment? What is the probability of each event? (b) [1 pt] Let X be the number of times that you

100. ## stor

Recall the Prisoners problem from class. We have three prisoners (A, B, and C) on death row. The Governor will pardon one of the prisoners, and he tells the Warden who he chose, but the warden is not allowed to reveal who was pardoned. Lets switch things

101. ## Math

during the softball season, judy had 35 hits. Among her hits were one home run, 1 triple and 5 doubles. the rest of her hits were single ?

102. ## Math

If the limit as x approaches 1 for (f(x) - 7)/(x-1)=8, evaluate the limit as x approaches 1 for f(x)

103. ## physics

A car with an initial speed of 21.9 km/h accelerates at a uniform rate of 0.89 m/s 2 for 3.7 s. Find the ﬁnal speed of the car. Find the displacement of the car after that time. Answer in units of km

104. ## algebra

What is a simpler form of the radical expression? ^4sqrt 81x^20 y^8 A, 3|x^5|y^2 B. 9|x^25|y^4 C. 9x^25|y^4| D. 3x^5|y^2|

105. ## Math

A surface ship is moving in a straight line (horizontally) at 8km/hr. At the same time, an enemy submarine maintains a position directly below the ship while driving at an angle that is 20 degrees below the horizontal. How fast is the submarines altitude

106. ## Chemistry

A block of metal has a width of 3.2 cm , a length of 17.1cm , and height of 5.8cm . Its mass is 1.5kg . Calculate the density of the metal.

107. ## Physics

a) What is the total force of friction on a wagon’s wheels if it takes 30 N to move it at a constant speed across a bumpy path? b) Where on a bicycle do you want to reduce friction? How is this done? c What is meant by the coefficient of kinetic

108. ## physics

A ball is thrown straight upwards at a speed of 32.3 m/s and from a height of 1.5 m above the ground. How fast is it traveling when it hits the ground? (m/s)

109. ## Physics

a) The coefficient of kinetic friction between a steel block and an ice rink surface is 0.0100. If a force of 24.5 N keeps the steel block moving at a steady speed, what is the force of gravity on the block? b)A copper block has dimensions 1 cm × 2 cm ×

110. ## Physics

a) Why are there no units attached to values of μ? b)A force of 120 N is needed to push a box along a level road at a steady speed. If the force of gravity on the box is 250 N, what is the coefficient of kinetic friction between the box and the road?

111. ## Physics

A 48 N cart is pulled across a concrete path at a constant speed. A 42 N force is required to keep the cart moving. What is the coefficient of kinetic friction between the path and the cart?

112. ## physics

two stones with initial speeds of 13 m/s and are thrown at an angle 30 degrees, one below the horizontal and one above the horizontal. What is the distance between the points where the stones strike the ground?

113. ## physics

two stones with initial speeds of 13 m/s and are thrown at an angle 30 degrees, one below the horizontal and one above the horizontal. What is the distance between the points where the stones strike the ground?

114. ## physics

The acceleration due to gravity near a planet's surface is known to be 3.20 . Part A If the escape speed from the planet is 9.54 , determine its radius. Part B Find the mass of the planet. Part C If a probe is launched from its surface with a speed twice

115. ## physics

A regional airline flight consists of two legs with an intermediate stop. The airplane flies 380 due north from airport A to airport B. From there, it flies 260 due east to its final destination at airport C. Part A What is the magnitude of the plane’s

116. ## physics

At the Indianapolis 500 time trials, each car makes four consecutive laps, with its overall or average speed determining that car’s place on race day. Each lap covers 2.5 (exact). During a practice run, cautiously and gradually taking his car faster and

117. ## physics

A bullet traveling horizontally at a speed of 350 hits a board perpendicular to its surface, passes through and emerges on the other side at a speed of 230 . If the board is 3.80 thick, how long does the bullet take to pass through it?

118. ## English

"She is resting ( comfortable, comfortably) backstage." Is the correct answer comfortably even if it follows the linking verb is

119. ## social studies

Frick and Frack are 35-year-old identical twins separated in infancy and reared apart. Frick and Frack were recently reunited for the first time since birth. They have discovered that they have many things in common. Both twins have high IQs, both have

120. ## math

How to find the value of y in a fraction

121. ## chemistry

A solution of ethanol (C2H50H) in water is prepared by dissolving 76.9ml of ethanol (density0.79g/cm3) in enough water to make 0.25L of solution. What is the molarity of ethanol in this solution Who helps me

122. ## Chemistry

The Ka of a monoprotic weak acid is 3.39 × 10-3. What is the percent ionization of a 0.125 M solution of this acid? I just do not know where to even start...

123. ## Physics

A 1500 kg car moves along a horizontal road at speed v0 = 21.9 m/s. The road is wet, so the static friction coeﬃcient between the tires and the road is only µs = 0.302 and the kinetic friction coeﬃcient is even lower, µk = 0.2114. The acceleration of

124. ## physics

Unless otherwise stated, all objects are located near the Earth's surface, where = 9.80 . A 3000 truck tows a 1500 car by a chain. Part A If the net forward force on the truck by the ground is 3500 , what is the acceleration of the car? Part B What is the

125. ## physics

Total mechanical energy of a flying rubber ball is 2000 J. It has a velocity of 151 ms-1 and is 3.1 m above the ground. Find the mass of the ball. (2dp)

126. ## physics

A skier travelling at 14 m s-1 reaches the foot of a steady upward 14° incline and glides 21 m along this slope before coming to rest. What was the average coefficient of friction?

127. ## chemistry

A STUDENT STUDYING THE FE+3- HSCN equilibrium put into a test tube 10.00ml of 2.00 x 10-3 M Fe(NO3)3 with 10.0 mL of 2.00 x 10-3 M HSCN.THE H+ in the resulting solution was manteined at 0.500.By spectrophotometric analysis of the equilibrium solution, the

128. ## physics

Calculate the power required of a 1190 kg car as it climbs a 11° hill at a steady 103 km h-1. The total friction and air resistance is 700 N. Answer in kW, to the nearest whole number.

129. ## physics

During liftoff, a hot-air balloon accelerates upward at a rate of 2.5 . The balloonist drops an object over the side of the gondola when the speed is 12 . a)What is the magnitude of the object’s acceleration after it is released (relative to the ground)?

130. ## physics

two stones with initial speeds of 13 m/s and are thrown at an angle 30 degrees, one below the horizontal and one above the horizontal. What is the distance between the points where the stones strike the ground?

131. ## human resources

I do not understand the assignment my teacher gave me if possible can you find me an article so i can do my presentation that meets the standards that my teacher wants. You are required to report on one (1) What’s News article this semester. Five minutes

what are the other terms in discount series

133. ## Geometry

Given triangle ABC, AD bisects angle BAC,and AE=ED Prove AE/AC=BD/BC Because I cant draw it I will explain. Its a triangle, A is the point at the top, B is the point at the bottom left and C is the point at the bottom right.There is a line going right down

134. ## Physics

A spy satellite is in circular orbit around Earth. It makes one revolution in 6.01 hours. (a) How high above Earth's surface is the satellite? [Answer in Km] (b) What is the satellite's acceleration? [Answer in m/s^2] I see this posted over and over again

135. ## International Relations

I want to write a thesis statement on the topic "China is not going to be the next superpower" How am i supposed to write it?

136. ## HIstory

"reported to the king on colonial activities and ensured harmony among his parishes". is actually suppossed to be François de Laval

asked by I Gave Wrong Info Ms.Sue
137. ## physics

Unless otherwise stated, all objects are located near the Earth's surface, where = 9.80 . A block of mass 23.0 slides down a frictionless surface inclined at 35. Part A To ensure that the block does not accelerate, what is the magnitude of the smallest

138. ## chemistry

Identify a haloalkane and describe the manner in which it functions as an anesthetic.

139. ## physics

A Superball is dropped from a height of 2.4 and rebounds off the floor to a height of 1.9 . Part A If the ball is in contact with the floor for 0.70 , determine the direction of the ball’s average acceleration due to the floor. If the ball is in contact

140. ## Chemistry

This is a question I am presently doing right now which I found in my homework. I am quite sure that in (a) I have to use the Hasselbach equation though I am not sure how to work it out. If anyone knows any of the answers, and how you got to them, please

141. ## Chemistry

This is a question I am presently doing right now which I found in my homework. I am quite sure that in (a) I have to use the Hasselbach equation though I am not sure how to work it out. If anyone knows any of the answers, and how you got to them, please

142. ## physics

Unless otherwise stated, all objects are located near the Earth's surface, where = 9.8 . A hockey puck with a weight of 0.80 is sliding freely across a section of very smooth (frictionless) horizontal ice. Part A When it is sliding freely, how does the

143. ## Chemistry

I have had this question in my homework, and honestly I got stuck in these questions. I managed to convert 5.3g of Na2CO3 into moles, but then I got stuck and do not know what to do next to solve the question. If anyone knows how to work this out, help

144. ## English

Thank You, Ms. Sue I understand it better now

145. ## statistics

For a particular sample of 63 scores on a psychology exam, the following results were obtained. First quartile = 57 Third quartile = 72 Standard deviation = 9 Range = 52 Mean = 72 Median = 68 Mode = 70 Midrange = 57 Answer each of the following: I. What

146. ## physics

A 125 object is taken to a height of 210 above the Earth's surface. Part A What is the object's mass at this height? Part B What is the object's weight at this height?

147. ## physics

Unless otherwise stated, all objects are located near the Earth's surface, where = 9.80 . When a horizontal force of 340 is applied to a 68.0 box, the box slides on a level floor, opposed by a force of kinetic friction of 150 . Part A What is the magnitude

148. ## Math

Divide 64 bundles of newspapers into two groups so the ratio is 3 to 5.

149. ## statistics

. In terms of the mean and standard deviation: - What does it mean to say that a particular value of x has a standard score of +1.5? - What does it mean to say that a particular value of x has a z-score of -2.6? Please show all work.

150. ## physics

Four identical masses of 3.5 each are located at the corners of a square with 1.8 sides. Part A What is the net force on any one of the masses?

151. ## math

you are taking a 10 question essay test. How many ways can you answer the test?

152. ## college algebra

(x+5y)(7x+3y)How do I solve this. I know I have to somehow combine the x and y but can't remember.

153. ## College algebra

How do I solve this?(7x+5y)^2

154. ## Mythology

I wonder if this is a good example of magical realism for my own etiological myth: Theodoreus carries a big sack, then opens it in front of Cyclopes after he says, "What are you going to do with that big sack?" This idea may need to expand.

155. ## geometry

Draw and label the following: segment AB intersects segment CD at point M. M is the midpoint of both segments. If AM = x2 + 8x + 17 and MB = 12x + 14, find AB.

157. ## College algebra

(2x-3)(x^2-3x+5)

158. ## chemistry

In industrial plants, what specific type of oil is used as heating medium?

159. ## statistics

. In terms of the mean and standard deviation: - What does it mean to say that a particular value of x has a standard score of +1.5? - What does it mean to say that a particular value of x has a z-score of -2.6?

160. ## statistics

A student scored 30 percent on a test, and was in the 24th percentile. Explain these two numbers! Please show work!

161. ## statistics

In each of the four examples listed below, one of the given variables is independent (x) and one of the given variables is dependent (y). Indicate in each case which variable is independent and which variable is dependent. I. Rainfall; Crop yield II.

162. ## statistics

A sample of purchases at the local convenience store has resulted in the following sample data, where x = the number of items purchased per customer and f = the number of customers. x= 1,2,3,4,5 f=8, 20, 8, 8, 7 What does the 20 stand for in the above

163. ## statistics

Suppose we have a set of body temperatures with a mean of 98.6 degrees, and a sample standard deviation of 1.0 degree. Assuming a normal distribution of body temperatures in the larger population, between what two values should 95% of all temperatures lie?

164. ## statistics

SAT I scores around the nation tend to have a mean scale score around 500, a standard deviation of about 100 points, and are approximately normally distributed. What SAT I score within the population would have a percentile rank of approximately 97.5? Show

165. ## algebra

(2x+3)^2 is 25x right?

166. ## Accounting

Shirts Unlimited operates a chain of shirt stores that carry many styles of shirts that are all sold at the same price. To encourage sales personnel to be aggressive in their sales efforts, the company pays a substantial sales commission on each shirt

167. ## Math

A cardboard manufacturer wishes to make open boxes from square pieces of cardboard of side 12 in. by cutting equal squares from the four corners and turning up the sides. Let x inches be the length of the side of the the square to be cut out. Express the

168. ## accounting

Shastri Bicycle of Bombay, India, produces an inexpensive, yet rugged, bicycle for use on the city’s crowded streets that it sells for 930 rupees. (Indian currency is denominated in rupees, denoted by Picture.) Selected data for the company’s

169. ## Ethics

Is there a difference between decisions based on law versus decisions based on ethics?

170. ## colLege math

(2x-1)(x^2-4x+3)