# Questions Asked onSeptember 21, 2010

1. ## chem

Which of the following elements would you expect to gain electrons in chemical changes? (Select all that apply.) gold chromium zirconium nitrogen iodine

2. ## physics

a cheetah can accelerate from rest to 24 m/s in 2.0 s . Assuming the acceleration is constant over the time interval, a)what is the magnitude of the acceleration of the cheetah? b) what is the distance traveled by the cheetah in these 2.0 s.? c) a runner

3. ## Physics

A chain composed of four identical links is suspended by a rope and does not move. How many force vectors would be drawn on the free body diagram of each link and which direction would they point? My answer: ---------- FIRST LINK (top): Upward force from

4. ## physics

Engineers are developing new types of guns that might someday be used to launch satellites as if they were bullets. One such gun can give a small object a velocity of 2.5 km/s while moving it through a distance of only 1.7 cm. (a) What acceleration does

5. ## physiscs

a pendulum of the length L is suspended from the ceiling of an elevator. When the elevator is at rest , the period of the pendulum is T. In instant when the pendulum reaches its highest position the elevator starts the free fall. What is the period of the

6. ## science

in a symbiotic relationship a) both organisms always benefit b) both organisms are harmed c) both organisms never benefit d) at least one organism always benefits e) neither organisms is affected d

7. ## Calculus

Find expressions for the quadratic functions whose graphs are shown. One graph has the point (4,2) plotted in which the parabola passes through (U-shaped parabola- right side up) The vertex is at (3,0) and the parabola does not touch the y-axis for as much

8. ## Science

Calculate how much 95% ethyl alcohol will be required to dissolve 075g sulfanilamide at 78 degree Celsius. Knowing that solubility of sulfanilamide is 210 mg/ml at 78 degree Celsius, 14mg/ml at 0 Degree Celsius.

9. ## Chemistry

Please help the question that I got is: Calculate how much 95% ethyl alcohol will be required to dissolve 075g sulfanilamide at 78 degree Celsius. Knowing that solubility of sulfanilamide is 210 mg/ml at 78 degree Celsius, 14mg/ml at 0 Degree Celsius.

10. ## Chemistry

a)What mass of water is produced from the complete combustion of 2.30×10−3 g of methane? b)What mass of oxygen is needed for the complete combustion of 2.30×10−3 g of methane? This is the unbalanced equation given: CH4+O2->CO2+H2O

11. ## Chemistry

a). What mass of carbon dioxide is produced from the complete combustion of 2.30×10−3g of methane? b)What mass of carbon dioxide is produced from the complete combustion of 2.30×10−3 g of methane? Can someone step me through this?

12. ## Physics

A projectile is launched from ground level to the top of a cliff which is 195 m away and 155 m high. If the projectile lands on top of the cliff 9.2 s after it is fired, find the initial velocity of the projectile (magnitude and direction). Neglect air

13. ## Math

A real estate agent to sell a large apartment complex according to the following commission schedule: $45,000 plus 25% of the selling price in excess of$900,000. Assuming that the complex will sell at some price between $900,000 and$1,100,000, inclusive,

14. ## physics

A horizontal force of 100 N is required to push a piece of furniture across a floor at a constant velocity. what is the net force acting on the furniture? How much is the friction force that acts on the sliding furniture? How much friction acts on the

15. ## physics

If the back of the truck is 1.0 above the ground and the ramp is inclined at 26, how much time do the workers have to get to the piano before it reaches the bottom of the ramp?

16. ## physics

A man whose mass is 75kg walks up a flight of 12 steps each 20 cm high in 5 seconds . Find the power he develops in watts

20. ## chemistry

calculate the amount of heat released when 50g of water at 100degrees hits the skin, condenses, cools the body to 37 degrees

21. ## chemistry

Commercially available concentrated sulfuric acid is 18.0 M H2SO4. Calculate the volume (in mL) of concentrated sulfuric acid required to prepare 1.60 L of 0.320 M H2SO4 solution.

22. ## physics

You throw a ball upward from a window at a speed of 2.9 m/s. How fast will it be moving when it hits the sidewalk 2.2 m below?

23. ## 6th grade social studies

When and why did the cultures od Egypt an Nubia begin to mix? The cultures of Egypt and Nubia begin to mix as people and goods passed between Egypt and Nubia. The two cultures mix because Egypt conquered most of Nubia and ruled it for 100 years and during

24. ## physics

An airplane is flying horizontally with a constant velocity of 170 m/s at an altitude of 4500 m when it drops a package. (a) How long does it take for the package to reach the ground? ___s (b) What is the distance between the airplane and the package when

25. ## college physics

A 78-kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.2 m/s in 0.74 s. The elevator travels with this constant speed for 5.0 s, undergoes a uniform negative acceleration for 1.8 s,

26. ## physics

A diver running 1.8m/s dives out horizontally from the edge of a vertical cliff and 3.0s later reaches the water below. How high was the cliff, and how far from its base did the diver hit the water?

27. ## college physics

A football punter accelerates a football from rest to a speed of 7 m/s during the time in which his toe is in contact with the ball (about 0.26 s). If the football has a mass of 0.50 kg, what average force does the punter exert on the ball?

28. ## Chemistry

ammonia gas reacts with copper (ii) oxide at high temperatures to produce elemental nitrogen, copper metal, and water vapor. Assume that 36.2g ammonia reacts with 180.8 g copper ii oxide. (balanced equation: 2 NH4 (ammonium) (g) + 4 CuO (copper ii oxide)

29. ## college physics

To stretch a spring 7.00 cm from its unstretched length, 16.0 J of work must be done. What is the force constant of this spring? What magnitude force is needed to stretch the spring 7.00 cm from its unstretched length? How much work must be done to

30. ## Math

How do I write an equation or an inequality for this: the product of a number z and 12 is 60

31. ## science

a cookie a certain mass. explain why the mass would not change if you break the cookie in half.

32. ## chemistry

3) A graduated cylinder has 25.0mL of water in it before an aluminum cube with the mass of 10.0g is added to it. What is the new level of water in the cylinder?

33. ## Math

a grocery clerk nstacks three rows of can of fruit for a display, each of the top two rows has 2 fewer cans than the row beneath it, there are 30 cans altogether, how many cans are in each row?

34. ## Math

If light travels 10,000 km in 3.3 x 10-2 sec, how long will it take light to travel one meter.

35. ## Chemistry

a)How many grams of NH3 can be produced from 2.84mol of N2. b)How many grams of H2 are needed to produce 14.86g of NH3? balanced equation: 3H2+N2->2HN3

36. ## physics

Suppose I throw a ball straight up at an initial speed of 10 m/s. Suppose I'm 2 meters tall (about 6 feet) and the ball leaves my hand at 2 meters from the ground. How fast is it going at its highest point? How fast is it going on its way back down at 2

37. ## physics

You throw a ball downward from a window at a speed of 1.9 m/s. How fast will it be moving when it hits the sidewalk 2.2 m below?

38. ## PHYSICS

1. to make a secure fit, rivets that are larger than the rivet hole are often used and the rivet is cooled (usually in dry ice) before it is placed in the hole. a steel rivet 1.871 cm in diameter is to be placed in a hole 1.869 cm in diameter at 20 degree

70. ## physic

The velocity vector V1 has a magnitude of 3.0 m/s and is directed along the +x-axis. The velocity vector V2 has a magnitude of 2.0 m/s. The sum of the two is V3, so that V3 = V1+V2 true or false for each question The magnitude of V3 can be -3.0 m/s The

71. ## physics

Rocket-powered sleds are used to test the responses of humans to acceleration. Starting from rest, one sled can reach a speed of 444 m/s in 1.80 s and can be brought to a stop again in 2.15 s. (a) Calculate the acceleration of the sled when starting, and

explain how to compare 8,563 and 8699

73. ## Physics

A spring with a spring constant of 223.9 N/m is compressed by 0.220 m. Then a steel ball bearing of mass 0.0372 kg is put against the end of the spring, and the spring is released. What is the speed of the ball bearing right after it loses contact with the

74. ## chemistry

A 0.4272-g sample of a potassium hydroxide – lithium hydroxide mixture requires 26.94mL of 0.3385M for its titration to the equivalence point. What is the mass percent lithium hydroxide in this mixture?

75. ## Science

a cumulus cloud is growing taller, what will happen to the density of the air beneath it? explain

76. ## physics

a cannon ball is shot from a 100 m high cliff with an inital velocity of 24m/s and at an angle of 32 degrees. what is the overall final velocity of the cannonball?

77. ## chemistry

What is the volume in milliliters of 7.24 {\rm g} of acetone?

78. ## physics

You drop a stone into a deep well and hear it hit the bottom 1.90 s later. This is the time it takes for the stone to fall to the bottom of the well, plus the time it takes for the sound of the stone hitting the bottom to reach you. Sound travels about 343

79. ## physics

You push a large 32 kg crate across the floor with a force F=330 N at an angle of 21 degrees below the horizontal. If the coefficient of kinetic friction between the crate and the floor is 0.45, what is the acceleration of the crate?

80. ## physics

An athlete executing a long jumper leaves the ground at a 27.0 degree angle and travels 7.89 m. What was the takeoff speed?

81. ## Physics

A 1500 kg automobile travels at a speed of 105 km/h along a straight concrete highway. Faced with an emergency situation, the driver jams on the brakes, and the car skids to a stop. (a) What will be the car's stopping distance for dry pavement (µ = 0.85)?

82. ## Honors Physics

A mass, m1 = 5.00 kg, resting on a frictionless horizontal table is connected to a cable that passes over a pulley and then is fastened to a hanging mass, m2 = 9.0 kg. Find the acceleration of each mass and the tension in the cable. PLEASE HELP!

83. ## Physics

A chain composed of four identical links is suspended by a rope and does not move. What are the forces on each chain? (include where they come from)

84. ## Accounting

Can financial statement users of not-for-profit hospitals’ financial statements expect to be fully informed regarding affiliated parties, such as the linkage between St. Jude Children’s Research Hospital, ALSAC, and the foundation cited?

85. ## English

For the Richard Cory poem: 1) What is the denotation of "crown" in this use? "sole to crown" -- Would it be that they thought him to be a king?

86. ## physics

An athlete executing a long jumper leaves the ground at a 27.0 degree angle and travels 7.89 m. What was the takeoff speed? If this speed were increased by just 5.0%, how much longer would the jump be?

87. ## Algebra 1

could you tell me where I can get the "why do girls like guys who wear shirts with eight buttons?" worksheet to print free online?

88. ## Chemistry

Hello. My teacher gave us a worksheet today she tried to explain it but I still don't understand it can someone help me please? 1) A jar is filled with mercury and has a volume of 500.mL. What is the mass of mercury in the jar? Show your work for credit.

89. ## Physics

Can someone help me to understand how to work out this problem? The pilot of an airplane traveling 240 km/h wants to drop supplies to flood victims isolated on a patch of land 160 m below. The supplies should be dropped how many seconds before the plane is

90. ## physics

A fully loaded 737 aircraft takes off at 250 {\rm km/h}.

91. ## American Government

I have to do a 5 minute presentation on George Washington and I have to focus on his contributions towards the Constitution. All the sites I go to have pretty much the same information. Does anyone have sites that could help me?

92. ## Grammar

Write each possessive noun or contraction with an apostrophe. 1. Woodrow Wilson was Americas twenty-eighth president. America's 2. As a student at Princeton, joined the schools debating society. schools' 3. Before becoming president, he served as Princeton

93. ## 6th grade social studies

Okay, here's another. Describe the series of events that led to the end of Egypt's power in the Nile River Valley. My answer--The series of events started with Egypt having trouble with keeping conquered people under control,then they were conquered by the

94. ## Algebra

Determine if the following two planes 2x+3y-z=4 and 3x-4y-6z=1 are parallel, orthogonal or coincidental

95. ## Astronomy

A photon of which color of light carries the least energy. Red Yellow Green Blue All photons have the same energy.

96. ## Algebra II

This deals with quadratic functions-If I have a graph with points h=-5, k =3 and they ask for the translation, would it be {5,3} or would the translation just be {-5,3}

97. ## math

A cyclist leaves his training base for a morning workout, riding at the rate of 18 mph. One hour later, his support staff leaves the base in a car going 52 mph in the same direction. How long will it take the support staff to catch up with the cyclist once

98. ## algebra 1

When studying probability, a method used for counting the number of possible outcomes is a ______. a.tree diagram b.dependent event c.relative frequency d.simulation A?

99. ## Chemistry

Anhydrous CuSO4 can be used to dry liquids in which it is insoluble. The CuSO4 is converted to CuSO4.5H2O, which can be filtered off from the liquid. What is the minimum mass of anhydrous CuSO4 needed to remove 12.4g H2O from a tankful of gasoline?

100. ## Physics

A brick is thrown upward from the top of a building at an angle of 30° to the horizontal and with an initial speed of 11 m/s. If the brick is in flight for 3.2 s, how tall is the building? ___m

101. ## physics

A ball is thrown horizontally from the roof of a building 33.0 m tall and lands 20.5 m from the base. What was the ball's initial speed?

102. ## Chemistry

What mass of protons would be required to just neutralize the charge of 1.5 g of electrons?

103. ## science

An organism's ability to maintain homeostasis is important to it's survival. Explain why an organism that lives on land has more complex mechanisms to maintain a stable internal environment than organims that live in water.

104. ## Math

The entire surface of a solid cube with a length of 6 inches is painted. The cube is then cut into cubes each with edge of length 1 inch. How many smaller cubes are there? How many of the smaller cubes have paint on exactly 1 face?

105. ## geometry

As the marketing designer for Burger King, you are given a 4 in by 6 in logo and have been told to create an advertisement that is six times larger. What is the area of your advertisement (in feet)? [12 inches = 1 ft] A. 6 ft2 B. 36 ft2 C. 72 ft2 D. 3 ft2

106. ## statistics

Job Sat. INTR. EXTR. Benefits 5.2 5.5 6.8 1.4 5.1 5.5 5.5 5.4 5.8 5.2 4.6 6.2 5.5 5.3 5.7 2.3 3.2 4.7 5.6 4.5 5.2 5.5 5.5 5.4 5.1 5.2 4.6 6.2 5.8 5.3 5.7 2.3 5.3 4.7 5.6 4.5 5.9 5.4 5.6 5.4 3.7 6.2 5.5 6.2 5.5 5.2 4.6 6.2 5.8 5.3 5.7 2.3 5.3 4.7 5.6 4.5

107. ## science

Check my answers? thanks ppl 1. which of the folowing is NOT considered an organism? A an oak leaf B a spider C an elephant D a bacteria cell is it D. 2.to which domain of life do humans belong? A. animals B. eukarya C. archae D. none of the above IS IT D

108. ## Algebra 1

Find all sets of four consecutive even whole numbers whose sum is less than 35

109. ## Science

A bus makes a 10 mile journey throuh town. Its top speed is 30mph and its mean speed its 10 mph. Explain why these speeds are different?

110. ## physics

The pilot of an airplane traveling 180 km/h wants to drop supplies to flood victims isolated on a patch of land 125 m below. The supplies should be dropped how many seconds before the plane is directly overhead? ______s

111. ## Physics

A particle of mass m is subjected to a force acting in the x-direction. Fx = (3.2 + 0.55x) N. Find the work done by the force as the particle moves from x = 0 to x = 4.5 m. 1

112. ## To Brittany and Ryan

Because of your unacceptable remarks about another student's homework assignment, you have been banned on a temporary basis. We'll see in a couple of days if you can demonstrate civility online.

113. ## Geometry

The perimeter of a regular pentagon is 31 cm. Find the length of each side.

114. ## Calculus

An airplane is flying at a speed of 350 mi/h at an altitude of one mile and passes directly over a radar station at time t=0. a) Express the horizontal distance d (in miles) that the plane has flown as a function of t. b) Express the distance s between the

115. ## science

1.Describe how the hot water and the cold water moved when the divider was lifted. 2.Use your understanding of density to explain the motion of the water.

116. ## Math

Which point on the circle x^2+y^2-12x-4y=50 is closest to the origin? Which point is farthest from the origin? Explain.

117. ## Science

A bus makes a 10 mile journey throuh town. Its top speed is 30mph and its mean speed its mph. Explain why these speeds are different?

118. ## math/physics

A motorboat whose speed in still water is 3.00 m/s must aim upstream at an angle of 27.0 degrees (with respect to a line perpendicular to the shore) in order to travel directly across the stream. What is the speed of the current?

119. ## math

solve the given equation for the variable of x x/3+3/5=5/6

120. ## college

Pretend the program in Senegal had been reducing infant mortality at a rate of 11 % per year. How long would it take for infant mortality to be reduced by 39 %?

121. ## algebra

what is the answer to this riddle? "what is the title of this picture?

122. ## Caclulus, bobpursley HELP!

Sorry for bothering you on this one question but I just replied to my original problem if you could help me with that.

123. ## physics

A motorboat whose speed in still water is 3.00 m/s must aim upstream at an angle of 27.0^\circ (with respect to a line perpendicular to the shore) in order to travel directly across the stream. What is the speed of the current?

124. ## math

Kelly subtracted 2.3 from 20 and got 17.7. Explain why this answer is resonable.

125. ## Physical Science

Need help please. the once with the ( ) is my answer but i am not sure if it right. Thanks for your help. 15. If the distance from a converging lens to the object is less than the focal length of the lens, the image will be A. real, inverted, and larger

126. ## communication

What are the concepts of assertive communication? What are the benefits of being an assertive nurse? The only thing I can come up with is that being an assertive nurse would allow you to stand up to a physician or authority when you feel they have done

127. ## college physics

After falling from rest from a height of 34 m, a 0.47 kg ball rebounds upward, reaching a height of 24 m. If the contact between ball and ground lasted 1.8 ms, what average force was exerted on the ball?

128. ## Physics

You push your couch a distance of 3.8 m across the living room floor with a horizontal force of 180.0 N. The force of friction is 136.0 N. What is the work done by you, by the friction force, by gravity, and by the net force? you 1 friction force 2 gravity

129. ## Physics

A small blimp is used for advertising purposes at a football game. It has a mass of 93.0 kg and is attached by a towrope to a truck on the ground. The towrope makes an angle of 53.3° downward from the horizontal, and the blimp hovers at a constant height

130. ## Calc

The manager of a weekend flea market knows from past experience that if he charges x dollars for a rental space at the market, then the number y of spaces he can rent is given by the equation y= 200-4x. Is this correct? Slope represents the relationship

131. ## algebra

In a triangle ABC , angle B is 4 times angle A and angle C is 17 degrees less than 5 times angle A. Find the size of the angles.

132. ## Chem- bobpursley

What mass of protons would be required to just neutralize the charge of 1.5 g of electrons? my teacher said .0015kg times 1e-/.00091e-27kg times 1pt/1e- times 1.67262e-27 over 1 p chem - bobpursley, Tuesday, September 21, 2010 at 6:48pm That is what I

133. ## physics

A particles has a mass of 0.5 kg and a velocity of 734 m/s along the x axis when a force of 21 N along the y axis acts on the particle at right angles to the velocity. The acceleration of the particle is ____ m/s2

134. ## Calculus

If the function f is defined by f(x)=x^2-2x, find limit h->0 (f(3+h)-(f(3-h))/2h

135. ## math

find the linear function f(x(=mx+b whose graph has the given slope and y intercept. slope is +19/15 and y-intercept is (0,-4) the linear function is f(x)=

136. ## physics

An airplane flies 200 km due west from city A to city B and then 305 km in the direction of 30.0° north of west from city B to city C. (a) In straight-line distance, how far is city C from city A? ___km (b) Relative to city A, in what direction is city C?

137. ## calculus

The position of a particle moving in a straight line during a 2-second trip is given below. s(t) = 2t 2 - 6t + 7 cm (a) What is the average velocity for the entire trip? (Assume the 2 second interval starts at t = 0.) 1 cm/second (b) Find a time at which

2a²+5a+3

139. ## college physics

A cannon is fired from a cliff 200 m high downward at an angle of 30o with respect to the horizontal. If the muzzle velocity is 34 m/s, what is its speed (in m/s) when it hits the ground?

140. ## physics

Consider again the problem of a car traveling along a banked turn. Sometimes roads have a "reversed" banking angle. That is, the road is tilted "away" from the center of curvature of the road. If the coefficient of static friction between the tires and the

141. ## science

What mass of protons would be required to just neutralize the charge of 1.7 g of electrons? I thought it was simple because 1 proton maxes out 1 electron but my teacher started talking abou this complicated way of doing it and i didn't get it :( can

142. ## port maria prep

un scramble this word achtres

143. ## Math

Find the area of the surface generated by revolving the curve y = (x + 3)^1/2, 2 ≤ x ≤ 4 about the x-axis.

144. ## world history

Did Islam become more less influential in West Africa from the 700s to the 1400s?

145. ## PHYSICS

An airplane has a mass of 34,500 kg and takes off under the influence of a constant net force of 44,500 N. What is the net force that acts on the plane's 79 kg pilot?

146. ## physics

Consider a simple harmonic oscillation with m=0.5kg, k=10N/m and amplitude A=3cm. What is the total energy of the oscillation?

147. ## physics

HELP PLEASE!!! A satellite moves in a circular orbit around Earth at a speed of 5085 m/s. (a) Determine the satellite's altitude above the surface of Earth. (b) Determine the period of the satellite's orbit.

148. ## math

x=((30)/(5.15+1.84i))+(5.15+1.84i) i= square root of (-1) final answer of x=10.3 please show me how you drive this equation to get the 10.3. thank you so much.

149. ## biology - Genetic probability

Black coat colour in Labrador Retrievers is produced by the dominant B allele. Brown labs are homozygous recessive (bb). Duke, a black male, whose mother was brown, is mated with Shadow, a black female, who in a previous mating with another father produced

150. ## Algebra

How do I solve a quadratic equation x^2 - x = 30 by completing the square- I don't understand-could someone just explain the steps to solving this

151. ## PHYSICS

An arrow is shot into the air at an angle of 59.6° above the horizontal with a speed of 21.5 m/s. (a) What are the x- and y-components of the velocity of the arrow 3.1 s after it leaves the bowstring? vx = m/s vy = m/s (b) What are the x- and y-components

152. ## math

phil took 1/5 of a piece of cheese and rena took 4/9 of the remaining amount?

153. ## Spanish

Indicate the relationships between the family members listed below Modelos: yo / mi tía Yo soy el (la) sobrino(a) de mi tía. mis abuelos / mi padre Mis abuelos son los padres de mi padre 1.mi madre / mi hijo(a) 2.mis primos / mi mamá

HOW CAN SOCIAL DEVELOPMENT IMPROVE THE ECONOMIC DEVELOPMENT OF A COUNTRY?

155. ## PHYSICSSS!

A brass lid screws tightly onto a glass jar at 20 oC. To help open the jar, it can be placed into a bath of hot water. After this treatment, the temperature of the lid and the jar are both 60 oC. The inside diameter of the lid is 8.0 cm at 20 oC. Find the

156. ## physics

A ball is thrown horizontally from the roof of a building 60 m tall and lands 45 m from the base. What was the ball's initial speed? _______m/s

157. ## Social Studies

What goes arund the world but stays in a corner?

158. ## AED 201

Determine which factors may explain that most of the higher per-pupil expenditures are found in the Northeastern and upper-Midwest states and the lower per-pupil expenditures are found in the South and West. In your opinion, what must happen to create a

159. ## physics

A net force of 295 N accelerates a bike and rider at 2.60 m/s^2. What is the mass of the bike and rider together?

160. ## Algebra

Ok, so , I have the question: -5=-8+5f. I'ev figured out that I have to add 8 to both sides of the equation,but now I'm stuck because I'm left with -3+5f=? And I can't figure out what should be on the other side of the equals sign. Please help! I'm a

Ashton broke apart a numer into 31+7. What number did he start with?

162. ## math

mary has 22 ribbons some of the ribbons are first place what expression shows how many of mary ribbons are not for first place

163. ## physics

The velocity vector V1 has a magnitude of 3.0 m/s and is directed along the +x-axis. The velocity vector V2 has a magnitude of 2.0 m/s. The sum of the two is V3, so that V3 = V1+V2 true for false The magnitude of V3 can be -3.0 m/s The x-component of V3

164. ## English

Can you please tell me if the following sentences are possible? I really don't know how to say it in English. Thank you. 1) I do the shopping at the market every Saturday. (Should I consider it a mistake if the sentence started with "every Saturday"?) 2)

165. ## science

What is the ultimate source of energy that powers the wind? Is my answer correct? The ultimate source of energy is the difference in air pressure.

166. ## biology

When considering the incresing complexity of atoms, molecules, cells, and tissues, you may notice that each step characteristics that were absent in the previous level. These characteristics, called emergent properties, demonstrate that the whole organism

167. ## Science

What experiment did Matthias Schleiden do? What prior information did he use to help him with his research/discovery? What tools did he need to complete his experiment?

168. ## Chemistry - more advice needed thanks

I obtained a lot of dirty brown ppt the moment the mixture was poured into AgNO3 solution. Does this mean my NaOH sample contains a lot of chlorides? Could other silver halides be present? However for my control solution of 50ppm sodium chloride solution,a

169. ## Computer Science

Mythical Man question: If it takes one person 3 months to complete a task, why does it take 4 people 6 months to complete the same task?

170. ## MATH

HOW MUCH LARGER THAN 3/4 INCHES IS 25/32?

171. ## PHYSICS

Taylor Swift leaves Philadelphia for a concert in Dallas. Kellie Pickler leaves at the same time, but in a different tour bus. After 2 hours, Taylor's bus has traveled 50% further than Kellie's bus. If Taylor's bus is going 30mph faster than kellies's bus,

An automobile with an initial speed of 4.56 m/s accelerates uniformly at the rate of 2.4 m/s2. Find the final speed of the car after 4.4 s. Answer in units of m/s. (part 2 of 2) Find the displacement of the car after 4.4 s. Answer in units of m.

173. ## Math

Reasoning question... in order from least to greatest the six numbers whose digits are 2,8, and 9...

174. ## math

x=((30)/(5.15+1.84i))+(5.15+1.84i) i= square root of (-1) final answer of x=10.3 please show me how you drive this equation to get the 10.3. thank you so much.

175. ## maths

For the reaction given below, how many grams of Na2CS3 are produced in the reaction of 65.0 mL of liquid CS2 (d = 1.26 g/mL) and 1.56 mol NaOH?

176. ## physics

A freight train has a mass of 1.7 multiplied by 107 kg. If the locomotive can exert a constant pull of 7.4 multiplied by 105 N, how long does it take to increase the speed of the train from rest to 68 km/h?

177. ## chemistry

How many ML of H2SO4 (20m) are needed to make 500ml of 5M solution?

178. ## physics

A 1.20 block is attached to a spring with spring constant 14.0 . While the block is sitting at rest, a student hits it with a hammer and almost instantaneously gives it a speed of 50.0 . What is the amplitude of the subsequent oscillations?

179. ## Math

The Bee's bus passes Jamie's house every 20 minutes, and the Wasp bus passes every half an hour. Both buses pass thehouse together at 1:10 P.M. When is the next time the buses pass together?HELP!

180. ## physics

A 1.20 block is attached to a spring with spring constant 14.0 . While the block is sitting at rest, a student hits it with a hammer and almost instantaneously gives it a speed of 50.0 . What is The block's speed at the point where = 0.350 A?

181. ## math

i have math homework and it says i have to find 1 pair of rectangle that are simular and find the scale factor but i cant find the scale factorthe k rectangle is 4 cubes base by 3cubes height and n rectangle is 12 cubes base and 1 cube height but i cant

182. ## Chemistry

For the Following sets of compounds determine the best solvent, by looking at structure, also by looking at solubility vs. temp. Which is the best solvent for crystalization, in which the compound is too soluble, and in which solvent the compound is not

183. ## Second order half life

At 100 degrees C , a certain substance undergoes second-order decomposition with a half-life of 26 minutes. If the initial concentration of the substance is 3.9×10−2M , what is the value of the rate constant at 100degrees C? So I put in (1560seconds)

184. ## Chemistry

What is the minimum mass of anhydrous CuSO4 needed to remove 12.4g H2O from a tankful of gasoline?

185. ## Sociology college

Hello! i need help my homework In a Gemeinshaft society,people are more likely to 1) be highly dependent on the nuclear rather than the extended family 2) view life and morals in terms of how they affect the individual 3) stress formal education as a

186. ## calculus

use the following tables for f(x)and g(x), and just fill in the tables shown below: Use the following two tables: x 0 1 2 3 4 5 y=g(x) 9 2 15 1 11 14 And fill in the following table: x 7 10 11 y=g(x-6) a b c A= B= C=

This deals with quadratic functions-If I have a graph with h = (-5)and k =3 and they ask for the translation, would it be {5,3} or would the translation just be {-5,3} Do you take the opposite of the number when it is transalated from the graph or do you

188. ## Science

What experiment did Rudolph Virchow do? What prior information did he use to help him with his research/discovery? What tools did he need to complete his experiment?

189. ## physics

A 1.20 block is attached to a spring with spring constant 14.0 . While the block is sitting at rest, a student hits it with a hammer and almost instantaneously gives it a speed of 50.0 . What is The block's speed at the point where = 0.350 A?

190. ## English

Can you tell me which of the following three questions is best formulated? 1)Who mentioned Kurtz to Marlow for the first time? OR 2) Who was the first to mention Kurtz to Marlow? 3) Who first mentioned Kurtz to Marlow? I don't think "entertainer" is the

191. ## Com 220

what types of introduction and what type of conclusion do you plan to write for your research paper

192. ## Literature

What are some challenges faced b a king/leader in Anglo-Saxon society?

When the shuttle bus comes to a sudden stop to avoid hitting a dog, it decelerates uniformly at 3.8 m/s2 as it slows from 8.8 m/s to 0 m/s. Find the time interval of acceleration for the bus. Answer in units of s.

how would you use the word civility in a sentence

195. ## Chemistry h/w

Hi, this is my first lab in 2nd semester of chemistry, and im not sure about my answers in the assignment can someone give it a quick look to check them? this is my phase diagram: tinypic. com/view.php?pic=1605yev&s=7 p.s. ignore the lone red dot its

196. ## english

How is "The Handsomest Drowned Man in the World" an example of the author using social realism?

197. ## English

I still have some doubts about a few questions. Thank you for the help. 1) Are they both possible? What did Kurtz struggle against when dying/when he was close to dying? 2) I'm wearing braces because I've got crooked teeth. 3) I hardly ever put make-up on

My teacher has me working on something he calls "tinging fractions". What is this? What does it mean? How does it work?

199. ## physics

A cannon is fired from a cliff 200 m high downward at an angle of 30o with respect to the horizontal. If the muzzle velocity is 34 m/s, what is its speed (in m/s) when it hits the ground?

200. ## physics 101

What minimum speed does a 150g puck need to make it to the top of a 4.5m -long, 21degree frictionless ramp?

201. ## Chemistry

Find the limiting reagent. 2 NH4 (g) + 4 CuO (s) ==> N2(g) + 4 Cu(s) + 4H2O (g) Please explain, thank you!

202. ## Chemistry - repost

Why 7ml of 10M HCl? Do I add 7ml of 10M HCl 1st slowly in ice bath, then slowly adjust the pH to 7 using 10M HCl? Then to dilute to 15ml in a graduated cylinder? Thanks Posted by candy on Tuesday, September 21, 2010 at 10:03am. The following is part of a

203. ## Math

ALL the factors for 1,498,677,308,996? It's taking me too long....o.o Thank ye for the help! xD I thank: Ms. Sue for answering my Economics question, you rock! Someone please answer this! Lots of love from Pancake

asked by The Official Pancake Queen
204. ## Math: Inequalities

How would I solve this inequality and graph? (x+2)((x^(2)-x+1)) > 0 I got x > -2 and x^(2)-x+1 > 0 How would I graph x^(2)-x+1 > 0 because I can't factor it.

205. ## english

what does this line mean? A man being sometimes more generous when he has but a little money than when he has plenty

206. ## geometry

write the definition " a prime number is a whole number greater then 1 and has exactly two factors" as a biconditional. i really need help on this!!i!!

207. ## chem

A carbon nucleus has six protons and six neutrons. How many electrons would it take to equal the mass of a carbon nucleus? my teacher said 6pt x conversion to make kg and then add that to 6nx conversion to make kilograms. then that times conversion for

208. ## Math

if three times the complement of an angle is subtracted from its supplement the result ends up being 59 degrees. Find the measure of the angle.

Calculate the simple interest and maturity valve for the following problems. Round to the nearest cent as needed. 18,000,4 1/2%,18mo.

Why can you simplify 5(5+30) using the distributive property?why can't u simplify 5(50)+3 using the distributive property?

211. ## Chemistry - bobpursley pls help

Posted by candy on Tuesday, September 21, 2010 at 3:12pm. Yes, my NaOH is granular. Why 7ml of 10M HCl? Do I add 7ml of 10M HCl 1st slowly in ice bath, then slowly adjust the pH to 7 using 10M HCl? Then to dilute to 15ml in a graduated cylinder? Thanks

212. ## social studies

what are these people famous for? like what did they do?: Henry the navigator Bartholomeu Dias hernan cortes queen isabella Ferdinand Magellan Martin Luther Montezuma Leif erikson

287. ## physics

A supply plane traveling 200 KM/hr need to drop supllys to a target 110 meters below. How many seconds before they are over the target do they have to drop the supplies?

288. ## Spanish

Indicate the relationships between the family members listed below Modelos: yo / mi tía Yo soy el (la) sobrino(a) de mi tía. mis abuelos / mi padre Mis abuelos son los padres de mi padre 1.mi madre / mi hijo(a) 2.mis primos / mi mamá I have the rest of

289. ## english/nursing

Why is nursing considered a professional career? I have to write a paper on professionalism and how nurses represent this.

290. ## Algebra

72+24x=288? What to do with the plus sign after I subract 24 from each side?

291. ## math

x.y=30 and x+y=10.3 ,what is x & Y. final answer is x=5.15+1.86i and y=5.15-186i, this way is by try and error (logic). but can somebody please show me how you do it by aljebra, please, thank you.

292. ## Chemistry

Why do you believe electrons exist?

328. ## math

3/4 - y/2 = 1/4 solve for y

329. ## science

Why is the sun classified as a G2?

330. ## statistics

60% of math major are women 15 were random and what probability that 5 are women.

331. ## science

sedimentary rock is formed from bits and pieces of dirt, clay and sand that have been carried. a) on the earth's crust b) underground c) in rivers and streams d) over mountaintops

332. ## Chemistry

Why would it be better to titrate a solution rather than just dilute it?

333. ## PHYSICS

The roadrunner leaves Pittsburgh at 7:15 in the morning at 10mph. He is headed toward Cleveland which is 131 miles away. If the coyote leaves 15 minutes later, what speed will he have to travel to get there at the same time as the road runner?

334. ## Math - Algebra

How to solve ;; x-y

335. ## Algebra

factor: 1. 6x^2y+4xy^3+10x^4y^4 2. 27m^3-8 3. 6n^8-11n^4-10 4. nx^2+x^2-9n-9

336. ## Algebra

Perform the indicated division 2x^2-7x-13/x-5

337. ## math

in which number does 4 have the greatest value 9499 4391 2240 1944

338. ## Algebra

How do you do these type problems?: 1/5+M=-2/5 6x+8=32 4(1/2X+1/2)=2X+2 3-Y=X (Is ^ -3 on both sides?)

339. ## Physics

two long separated friends, june and bill, spot each other in an airport terminal from a distance of 25m. they start to run towards each other. bill accerlates at a constant rate of 1.5m/s2, and june at a constant rate of 1.2m/s2. how far from junes inital

340. ## english

Make a list of expressions that are followed by the '-ing' form

341. ## Physics

Suppose I measure the velocity of an object at two different times, t1 and t2. If I tell you that the uncertainty in velocity is 0.1 m/s for each point, then calculate the uncertainty in acceleration if t1 = 0.0 s and t2 = 0.01s.

342. ## Math

1. if f(x)= 2x^2+ Ax^2 + 4x-5 and f(2)=5, what is the value of A? 2. state the domain of f(x)= x-2/x@-x-6

343. ## health

What are the ethicl considerations in obtaining a persons DNA?

344. ## Chemistry - urgent

The following is part of a procedure for a limit test for sulphates in an NaOH sample:- Dissolve 3.0g of NaOH in 6ml of deionized water, adjust to pH 7 with HCl (approx.7.5ml) and dilute to 15ml with deionized water. Please explain how to perform this

345. ## math

I can't find the definition and a picture example of distance-time-rate of speed. Help!

346. ## science

What are the description of ecosystem of the procambarus carkii

347. ## Math

How to solve this: ((x-3)(x+2))/((x-1)) < 0 I don't understand since theres x-1 in the denominator

348. ## english

i am doing a book report and i havent done one since the 5th grade and now i am in 7th HELP!!!!!!!!!!!!!!!!!!!!!!!!!

349. ## math

what is 6 to the second power

350. ## physics

what is the charge of +11mC

351. ## Math

Jethro is an employee at the New Capitol T -Shirt shop makes $16.00 per hour, measured in quarter hours. If he begins work at 9.30 AM, what time it will be when Jethro has earned$100.00 ? ( can you please write the steps. thankyou )

352. ## physics

what is the equation for acceleration?

i need a sentence with the word slid

354. ## Algebra

How do I solve the quadratic equation 3x^2 + 5x + 2 =0 Please explain the steps-I really don't get this

An automobile with an initial speed of 4.56m/s accelerates uniformly at the rate of 2.4m/s2. Find the final speed of the car after 4.4 s. Answer in units of m/s.

What is the simple and complex for this sentence. Making a bad grade on such an easy spelling test is such an embarrassment.

357. ## math

y/12 - 2/3 = 1/4

358. ## writing

what does it mean to " wright a tale that might have grown from it"?

359. ## Spelling

What are blending words?

360. ## Math

How is 3x2 different from 3 to the 2nd power ?

361. ## math

how do you model 624 without using hundreds?

362. ## spelling

I need a sentence with the word squib

363. ## science

please can you write a summary of maintaining an enviroment through conservation.

364. ## science

A MODEL OF A RESPIRATORY SYSTEM AND HOW U WENT ABOUT IT AND THE METHODS OR DESCRIPTINONS WITH THYE USE OF CORKS BALLONS SYTRAW AND OTHER THINGS.

365. ## Science

What are the three classification of rock?

366. ## math

-19/15 and y - intercept is 0-4

367. ## science

how can you tell the element of another

write a real word problem where you would multipy 120 and 75

369. ## Calculus, need help again...

If the function f is defined by f(x)=x^2-2x, find limit h->0 (f(3+h)-(f(3-h))/2h

370. ## math

find the other endpoint (x,11) of a segment given the endpoint (5,-4) and a distance of 17.

-9--4

372. ## math

4/5 - 2/y = 2/15

373. ## maths

how much greater is one quarter than one half

374. ## English

I want to ride. What parts of speech are to ride in this sentence.

375. ## math

soltion for -3( -6)+(4)(-2)

(-6)2 (-4)2

378. ## Math

what is the first step of figuring out what -5=-8+5f?

explain why 24,005 is greater than 8,999.

11/12x 40

381. ## math

what are the properties of a polygon