# Questions Asked onSeptember 7, 2014

1. ## Physics

Two cars, A and B, travel in a straight line. The distance of A from the starting point is given as a function of time by xA(t)=αt+βt^2, with α=2.60m/s and β=1.20m/s^2. The distance of B from the starting point is xB(t)=γt^2−δt^3, with γ=2.80m/s^2

2. ## maths

The rectangle box with square base is open at the top. The maximum volume of the box made from 1200 m2 tin,in m3 is:

3. ## 8th grade math

How do you express 3.16 x 10 to the 3rd power in standard decimal notation form.

4. ## Ed. Tech

After creating a column heading and/or typing text within a column, what must you do to move text to the next column? A. Add a column break B. Select the next column and start typing C. Highlight the next column D. Change the page orientation Is the answer

5. ## Chemistry

How much energy in kilojoules is released when 25.0 g of ethanol (C2H5OH) vapor at 93.0 C is cooled to -10 C? Ethanol has mp = -114.1 oC, bp = 78.3 oC, ΔHvap = 38.56 kJ/mol, and ΔHfus = 4.93 kJ/mol. The molar heat capacity is 112.3 J/(K.mol) for the

6. ## english

Please explain me about the poem two old bachelors by edward lear . summary of the man he killed by thomas hardy

7. ## Geography

Which of the following is true of the Antarctic Treaty System? A. It allows limited weapons testing of the continent. B. It encourages scientific research. C. Members came from the Antarctic Agreement. D. It limits restrictions of environmental controls.

asked by Sarah Habermehl
8. ## physics

In getting ready to slam-dunk the ball, a basketball player starts from rest and sprints to a speed of 11.0 m/s in 2.58 s. Assuming that the player accelerates uniformly, determine the distance he runs.

9. ## Physics

Two point charges are located on the y axis as follows: charge q1 = -2.50nC at y1 = -0.700m , and charge q2 = 3.30nC at the origin (y = 0). What is the magnitude of the net force exerted by these two charges on a third charge q3 = 9.00nC located at y3 =

10. ## chemistry

if the average speed of a helium atom at a certain temperature is 1130. m/s, what is the speed in miles per hour? (1 mi =1609m)

70. ## statics

two current forces acts at an angle 30 degree . the resultant force is 15 N and one of the forces is 10 N . find the other force

71. ## algebra

Ty uses the function g(x)=0.5+0.2(x-1) to calculate the cost in dollars of using a calling card to make a long distance call lasting x minutes.The variable x must be a hole number.graph the function then determine the cost of a 10-minute call

72. ## Physics

Two small plastic spheres are given positive electrical charges. When they are 11.0cm apart, the repulsive force between them has magnitude 0.300N. What is the charge on each sphere if one sphere has four times the charge of the other?

If angle

74. ## math

show that csc2 theta - tan2 (90 deg - theta) = sin2 theta + sin2 (90 deg - theta)

asked by avtar singh
75. ## maths

x+2y+3y=6 3x+2y+9z=14 2x+4y+z=7

asked by gauss elimination
76. ## Chemistry (concentrations)

A liquid mixture has 12.6 parts per thousand of MgCl2 dissolved. Calculate the [Cl-] in ppt? Im stuck plz help!

77. ## Quick English check

The sentences below have transitive verbs so each verb has a direct object. Read each sentences and underline its direct object. (Underline the subject once, and double underline the action verb and circle the do.) *** Some may not have DO*** please

78. ## Algebra

A 2 mile cab cost $5. A 6 mile cab costs$9. Write an equation to model the cost: c of a cab ride miles: m.

79. ## physics

A person swims with a speed v realative to water What dose this mean?

80. ## AP Physics C

as she pick up her riders a bus driver traverses four successive displacements represented by the expression (-6.30 b)i-(4.00 b cos 40)i-(4.00 sin 40)j+(3.00 b cos 50)i-(3.00 b sin 50)j-(5.00 b)j here b represents one city block,a convenient unit of

81. ## analytical chm

Analytical Balance which weighing method does one use when drying constant weight? Why?

82. ## Quick English check

The sentences below have transitive verbs so each verb has a direct object. Read each sentences and underline its direct object. (Underline the subject once, and double underline the action verb and circle the do. please correct me if I'm wrong! 5. He

83. ## statistical inference

find an estimator for theta from gamma distribution using method od moment

84. ## chemistry

An ore contains Fe3O4 and no other iron. The iron in a 65.46 gram sample of the ore is all converted by a series of chemical reactions to Fe2O3. The mass of Fe2O3 is measured to be 37.9 grams. What was the percent Fe3O4 in the sample of ore? Answer in

85. ## math

what is a five digit number less than 25,000 if each digits' value is one less than the digit to its right and is divisible by two and four

4÷√2 = ?

87. ## Math

Andy plans to build a rectangular dog pen in his backyard. A portion of the back wall of his house will serve as one side of the dog pen. If the perimeter of the dog pen must be 40 feet, which of the following widths will result in the maximum area? A. 6

88. ## physics

A rifle with a muzzle velocity of 480 m/s shoots a bullet at a target 45.6 m away. How high above the target must the rifle barrel be pointed to ensure that the bullet will hit the target? Neglect air resistance.

89. ## teaching in early childhood programs

Which of the following is not a strategy a teacher might use in an exploratory play activity? A. Observe attentively and silently. B. Use a challenge statement such as "Make a pattern with three different colors." C. Use a behavior-reflection statement

90. ## Calculus

Suppose the total area under the curve y=x^2-mx+1 from 0 to 5 is 11.3024. Find m. I know that this means that i need to find the integral of the absolute value of x^2-mx+1 from 0 to 5 and set it equal to 11.3024, but I am not sure where to go from there.

91. ## teaching in early childhood programs

A teacher is concerned about monitoring the progress of individual children in the second-grade classroom. What would be the best advice to give the teacher? A. Give a test periodically to see if the children have achieved according to the standards set.

92. ## chemistry

calculate the density of a solid if a cube meassuring 2.04cm on one side has a mass of 124g ......................g/cm3 calculate the mass of a cube the same substance measuring 7.97cm on one side enter your answer in scientific notaation

93. ## •teaching in early childhood programs

When assessing the overall layout of a classroom, what two factors should be so clear that children's movement behavior will be directly influenced? A. The amount of child-accessible storage and the presence of children's art materials B. The location of

94. ## chemistry

1.4602 cm x 2.488 cm x 10.399 cm =??

95. ## math

How would you write the verbal representation of a decimal?

96. ## math

The dimension of a closed cuboid box are in the ratio 5:4:3 if the total surface area is 0.94m^2,find the dimension of the box.

97. ## algebra 2

h(x)=x^3 -4. Find the domain, range and intercepts

98. ## algebra

use the foil method (7-6y)(7-4y) thanks to who ever can help me

asked by mike R
99. ## The Curiculum

Which of the following approaches helps children in their aesthetic development? A. Having children discuss what they're going to make before they begin B. Varying the materials available for children to use and balancing novel with familiar materials C.

100. ## Physics

Two 0.75m -long pendulums hang side by side. The masses of the pendulum bobs are 65g and 85g . The lighter bob is pulled aside until its string is horizontal and is then released from rest. It swings down and collides elastically with the other bob at the

101. ## chemistry

19.0 kg /0.036 m(3)(cube)=??

102. ## acconting

purchased a machine of Rs. 1000000 on 1/1/13, the service life of the machine is 10 years. The company calculate depreciation on straight line basis, which is = cost of the asset/no.of years

103. ## math

What is 12p^7 - 2p^7

104. ## Physics

A Honda Civic travels in a straight line along a road. Its distance x from a stop sign is given as a function of time t by the equation x(t)= α t^2− β t^3, where α = 1.54m/s2 and β = 5.05×10−2m/s^3 . Calculate the average velocity of the car for

105. ## Gr 11 Biology

Which person do you think would be more physically fit: a) an individual with a normal expiratory reserve volume and high vital capacity OR B)an individual with a high expiratory reserve volume and normal vital capacity

106. ## economics 7

An electronics company advertises that the battery life of its new smart phone with normal usage averages 72 hours. The company says this is one of the desirable characteristics of the phone which makes the phone a better choice compared to competitor

107. ## The Curriculum

When are children who live with overly critical or controlling adults particularly vulnerable? A. During years two and three, when they're exercising increased autonomy B. During elementary school, when involved in real task completion C. During

108. ## 7th grade LA

Identify the infinitive phrase. 1. While the train was stopped at the station, Bugsy attempted to climb to the top of one of the freight cars. Ans: to climb to the top of one of the freight cars? 2. During the Great Depression, audiences wanted to laugh

109. ## Math

Please ,look the Q and answers (Nnn) ..

110. ## math

One cubic meter (1.00 m3) of aluminum has a mass of 2.70E+3kg, and 1.00m3 of silver has a mass of 1.05E+4kg. Find the radius of an aluminum sphere whose mass is the same as that of an silver sphere of radius 1.07cm.

111. ## math

341- blank = a number between 115 and 120

112. ## Math - Urgent

The air temperature is -10 degree Celsius. With the wind blowing at a speed of 15 km/h, this temperate feels like -17 degrees Celsius. How many degrees does the temperature change because pf the wind chill?

113. ## Math

P;ease help me with the steps to solve this ratio 34:20=2:?

114. ## chemistry

What is the wavelength λ of the photon that has been released by−2.05×10−18 J?

115. ## Marketing

Clothing stores, grocery stores, shoe stores, and bookstores, are all examples of what type of channel member? A. retailers B. producers C. wholesalers D. drop shippers A.Retailers is my answer.

116. ## Geometry help

Points EC bisects points AD at C. For each of the following, find the value of 'x' and the measure of the indicated segment. Please correct me if I'm wrong! 1. AC= 3x+6 and CD=2x+14 x=_______ AC=______ Answer: x=8 AC= 30 2. AC= 5x-8 and CD=16-3x x=______

117. ## probability

There are four children of diff erent ages in a family. Their mom purchases six di erent gifts and decides to divide the gifts randomly between the children. Assuming that a child can receive no gift or multiple gifts, answer the following questions: (a)

118. ## Physics

What electric field strength would store 17.5J of energy in every 9.00mm3 of space?

119. ## Geography

What is/are the major cities of Canada? Im confused when it ask for the capital and major cities.

120. ## English

I have to write a "Descriptive essay" for my composition class and I need help proof reading my essay. This is the third draft I have done. I had to cut out over 400 words. The essay can be no more than 750 words. That is exactly how many I have right now.

121. ## Math

What would be the new ordered pairs of reflecting the figure formed by (-1, 5), (-2, 2), (3, 2), and (2, 5)?

122. ## Math

Sadiq dropped his watch into a lake. The depth of the lake is 5 meters. Sadiq can dive down towards the bottom of the lake at a speed of 2 meters per second, but can swim upwards at a rate of 1 meter per second. How long will it take Sadiq to get his watch

123. ## Calculus-Math

f(x) = (1/2)x ln(x^6) (−1, 0) (a) Find an equation of the tangent line to the graph of f at the given point. y=

124. ## chemistry

convert 278 amu to grams (scientific notation)

125. ## Algebra

Ten years ago, Heather was twice as old as her brother David. Today, she is 12 years older than him. How old are they both today? Heather's age today: 27 David's age today: 15 Thanks in advance! I tried using other solutions from Google and just am not

asked by Katie Elizabeth
126. ## Chemistry- urgent!

Perform the following operations and express the results in the correct number of significant digits or decimal places. Express all results in scientific notation. Please help me I'm so confused on how to do this!! 15. (1.71 x 10^6)(6.73 x 10^-8)/2.25 x 10

127. ## Algebra

Find an equation of the line containing the given pair of points (-2,-3) and (-9,-1) in slope-intercept form y=mx+b I think m=-2/7

128. ## math

18s^9 t^3 - 2s^9 t^2 = 9 can anyone explain pleases,thanks

129. ## physics

Clint Dempsey takes a free kick and kicks a soccer ball with a mass of 440 grams at 98 miles per hour. what is the momentum

130. ## Math

Does randomization relate to real world data?

147. ## Calculus

Using the definition of derivative state the function, f(x) and the value of a for lim as h->0 of (square root of (121+h) -11)/h

148. ## math

A rectangular box is to have a square base and a volume of 30 ft3. The material for the base costs 33¢/ft2, the material for the sides costs 10¢/ft2, and the material for the top costs 24¢/ft2. Letting x denote the length of one side of the base, find a

149. ## math

6/ 4 1/5=?/12 1/2=17 6/7 I cannot figure out how to get this 17 & 6/7 as an answer

150. ## math

Given that: 4(2g + 104) - 96 = 504 + 6(g - 14), solve for g. i'm confused on how to set this problem up - if anyone could help that would be great. thank you.

151. ## Physics

Two ping-pong balls each have a mass of (1.4x10^0) g and carry a net charge of (3.99x10^0) μC. One ball is held fixed. At what height should the second ball be placed directly above the fixed ball if it is to remain there?

152. ## Algerbra

select the approximate values of x that are solutions to f(x) = 0, where f(x) = -8^2 + 2x + 2

153. ## English check

The sentences below have transitive verbs so each verb has a direct object. Read each sentences and underline its direct object. (Underline the subject once, and double underline the action verb and circle the do.) *** Some may not have DO*** please

154. ## physics

A person takes a trip, driving with a constant speed 94 km/h except for a 50 min rest stop. If the person's average velocity is 74 km/h, how far is the trip? Answer in units of km.

155. ## Science

Why do we say that an explanation in science is tentative?

156. ## Chemistry

Suppose you have two 100-{\rm mL} graduated cylinders. In each cylinder there is 58.5mL of water. You also have two cubes: One is lead, and the other is aluminum. Each cube measures 2.0cm on each side. After you carefully lower each cube into the water of

157. ## Science of the Atmosphere

What is the temperature of air, given P= 90 kPA and the pressure is 1.0 kg(m^-3)? Thanks!

158. ## Mathematics

Assume that S/A = 7.0, D/A = .40, N/E = .80 and A = D + E. Solve for N/S. I'm lost. Does anyone have any tips? Thank you.

159. ## Algebra

The length of a rectangle is 11 cm more than the width. The perimeter is 90 cm. Find the length and width of the rectangle.

160. ## math 12

Here is question on an math assignment I was given, I have no clue what it is even asking. It's a Challenge Yourself question, I've typed it exactly how it is on my paper: A student is having difficult figuring out what is wrong with his proof: Let C=D

161. ## Physics

A small rock is thrown vertically upward with a speed of 14.0m/s from the edge of the roof of a 25.0m tall building. The rock doesn't hit the building on its way back down and lands in the street below. Air resistance can be neglected. What is the speed of

162. ## chemistry

A 6.0-ft person weighs 177lb. express this person's height in meters and weight in kilograms.

163. ## english

Identify the type of pronoun error in the sentence. If anyone accepts his challenge he will be sorry. reference case agreement

164. ## Physics

A car slows from 23 m/s to 3.4 m/s at a constant rate of 2.1 m/s2. How many seconds are required before the car is traveling at 3.4 m/s?

185. ## Physical Science

An 84.9 kg man is standing on a frictionless ice surface when he throws a 2.00kg book at 11.1m/s. Do the man move in the same direction as the book or opposite of the book.

186. ## math

Find an equation of the line that satisfies the given conditions. Through (−7, −12); perpendicular to the line passing through (−4, 0) and (0, −2)

187. ## Math - Urgent

Determine how each multiplication or division pattern is formed. Then write the next two numbers a) 81, -27, 9 ... b) 5, -20, 80...

188. ## Health

In 2004, which ethnic or racial group was at a lower risk of suicide for people ages 65 or older? A. Asian and Pacific Islanders B. Non-Hispanic Whites C. Non-Hispanic Blacks D. Hispanics

189. ## biology

Q: Analyze an experiment in which one group of plants receive extra fertilizer and another group receives extra water. Is the experiment controlled or uncontrolled? Support your answer. My answer: The experiment is uncontrolled because there is no

190. ## Health

Studies show that many older adults who die by suicide visited a physician within ________ before death. A. 3 months B. 6 months C. One year D. One month

191. ## Quick question

Do y'all do asl on here? Cause I need help putting English sentence into asl sentences.

192. ## physics

Two rockets are flying in the same direction and are side by side at the instant their retrorockets fire. Rocket A has an initial velocity of +4100 m/s, while rocket B has an initial velocity of +9400 m/s. After a time t both rockets are again side by