# Questions Asked onOctober 19, 2012

1. ## Physics

Which of the following is correct for the two coherent light waves to produce zero light? The light waves should travel in perpendicular directions. The light waves are in phase with each other. The light waves are out of phase with each other. The light

2. ## Physics

When a torch is brought 2 times closer, how many times brighter will it appear? 2 4 9 16 At first, I figured the answer would be the obvious (2), but then I second-guessed myself and figured 4

3. ## physics help needed very urgent !!!

The figure shows four penguins that are being playfully pulled along very slippery (frictionless) ice by a curator. The masses of three penguins and the tension in two of the cords are m1 = 10.5 kg, m3 = 14.7 kg, m4 = 22.05 kg, T2 = 120 N, and T4 = 236 N.

4. ## phyics help nedded

In the figure below, three ballot boxes are connected by cords, one of which wraps over a pulley having negligible friction on its axle and negligible mass. The masses are mA = 24.0 kg, mB = 40.0 kg, mC = 30.0 kg. (a) When the assembly is released from

5. ## physics is annoying

In a two-dimensional tug-of-war, Alex, Betty, and Charles pull horizontally on an automobile tire at the angles shown in the overhead view of the figure. The tire remains stationary in spite of the three pulls. Alex pulls with force of magnitude 227 N, and

6. ## Physics

When an electron moves 2.5 m in the direction of an electric field, the change in electrical potential energy of the electron is 8x10-17J. What is the strength of the electric field that causes the change in potential energy? 320 N/C 200 N/C 20 N/C 3.2 N/C

7. ## Physics

The maximum current in an AC circuit is 3.0 Amperes. What is the rms value of the current in the AC circuit? 0.5 A 2.1 A 3.0 A 4.2 A My answer is 2.1A.

8. ## chemistry

How many moles of water are there in 5 moles of Tungsten(V)oxalate tetrahydrate?

9. ## Physics

A proton experiences a force of 4 Newton when it enters perpendicular to the direction of the magnetic field with a speed 100 m/s. What is the force experienced by the proton if it enters parallel to the direction of the magnetic field with a speed of 200

10. ## chemistry

When nitrogen dioxide (NO2) from car exhaust combines w/ water in the air it forms nitric acid (HNO3), which causes acid rain, and nitrogen monoxide. 3NO2(g)+ H2O(L)----->2HNO3(aq)+ N(g) a.How many molecules of NO2 are needed to react with 0.300 mole H2O?

11. ## statistics

Given the length an athlete throws a hammer is a normal random variable with mean 50 feet and standard deviation 5 feet, what is the probability he throws it between 50 feet and 60 feet?

12. ## Math

he perimeter of a triangular-shaped garden is 58 feet. The longest side of the garden is 3 times the length of the shortest side of the garden. The other side of the garden is 18 feet more than the shortest side of the garden. What is the length of the

13. ## calculus

A cylinder is generated by rotating a rectangle with perimeter 12 in. about one of its sides.? Express the volume of the cylinder as a function of x. Find the approximate value of x that maximizes the volume. Then give the approximate maximum volume.

14. ## Accounting

Financial Accounting 1. The following information was made available from the income statement and balance sheet of Meranda Company: ITEM 12/31/2010 12/31/2009 Accounts Receivable $42,000$ 45,100 Accounts Payable 27,900 24,500 Merchandise Inventory

15. ## Physics

A 0.135 kg ball is thrown straight up from 1.94m above the ground. Its initial vertical speed is 5.60 m/s. A short time later, it hits the ground. Calculate the total work done by the force of gravity during that time.

16. ## Physics

A truck carrying a 38 kg crate accelerates uniformly from rest to 87.5 km/hr in 12.1 s. Calculate the work done on the crate by the truck. Please help:/

17. ## Physics

A 6.00 cm tall candle is placed at a distance of 30.0 cm from a double convex lens having a focal length of 15.0 cm. How tall is the image? 1.50 cm 3.00 cm 6.00 cm 9.00 cm I honestly don't even know where to begin with this one, but if I guessed, I would

18. ## chemistry

What STP volume of oxygen gas is obtained from the electrolysis of 140.0mLof water? (Hint: The density of water is 1.00g/mL.)

19. ## Physics

The tightrope walker gets tired and decides to stop for a rest. During this rest period, she is in translational equilibrium. She stops at middle of the rope and finds that both sides of the rope make an angle of è = 10.00° with the horizontal. If the

20. ## Physics

A metal sphere has a charge of -6 µC. How many excess electrons are there on the sphere? 4x10^-13 10x10^13 4x10^13 10x10^-13 I'm stuck between A or D...

21. ## Program Logic Design

create a flowchart that shows the logic for a program that generates a random number; then ask the user to think of a number between 1 and 10. The display then randomly generated number so the user can see whether his or her guess was accurate.

22. ## Math

Quadrilateral PQRS has vertices P(0,6), Q(-6,-2), R(2,-4), and S(4,2). Verify that the quadrilateral formed by joining the midpoints of the sides of PQRS is a parallelogram.

23. ## Physics

A common pickup for an electric guitar consists of a coil of wire around a small permanent magnet, as described in Figure 25.5. Why will this type of pickup fail with nylon strings?

24. ## Physics

On earth, two parts of a space probe weigh 18300 N and 4440 N. These parts are separated by a center-to-center distance of 5.11 m and may be treated as uniform spherical objects. Find the magnitude of the gravitational force that each part exerts on the

25. ## Physics

When an electron moves 2.5 m in the direction of an electric field, the change in electrical potential energy of the electron is 8x10-17J. What is the strength of the electric field that causes the change in potential energy? 320 N/C 200 N/C 20 N/C 3.2 N/C

26. ## math

by selling an article for rs.1200 the shopkeeper lost 10 percent .at what price he have sold it to gain 10percent.

27. ## english

The speaker in the poem from Auden’s “The Ten Songs” is trying to flee from? police. Hitler. memories. floods.

Mr. Jacob is 55 years old and Tony is 7 years old. In how many years will Mr. Jacob be 4 times as old as Tony? Please help me solve this.

29. ## Algebra

A bag contain 9 red, 8 yellow, 5 pink and 6 blue marbles. The experiment is to randomly select on marble out of the bag. What is the probability that chosen marble is a)blue? b)yellow? c) red or pink d)green or blue? need to know what all are

31. ## trig

A 15 FOOT LADDER MAKES 52 DEGREES ANGLE WITH THE GROUND.HOW FAR WILL THE TOP OF THE LADDER BE ABOVE THE GROUND?

32. ## math

7y + 8 = 57, then 2y =

33. ## math

Suppose C(x) measures an economy's personal consumption expenditure and x the personal income, both in billions of dollars. Then the following function measures the economy's savings corresponding to an income of x billion dollars. S(x) = x - C(x) (Income

34. ## physics to be solved ..easy !!

A shot putter launches a 6.910 kg shot by pushing it along a straight line of length 1.650 m and at an angle of 33.80° from the horizontal, accelerating the shot to the launch speed from its initial speed of 2.500 m/s (which is due to the athlete's

35. ## chemistry

Why adding NH4OH to Al3+ , forms Al(OH)3 and not complex ion Al(NH3)3 ? thanks so much

36. ## Physics

What happens to the force between the charges if the distance between the charges is increased to two times its original value? Value of the force is increased by two. Value of the force is decreased by two. Value of the force is decreased by four. Value

37. ## Chemistry

Performing the same experiment described on your lab manual, a student used a 0.358 g sample of Alka-Seltzer and the mass of CO2 was found to be 0.102 g. Based on this result, answer the following questions: Determine the mass of NaHCO3 that produced the

38. ## Chemistry

Which salts cannot be prepared by an acid-alkali titration method? And why? A. Sodium sulfate B. Ammonium sulfate C. Potassium nitrate D. Iron(II) nitrate

39. ## Chemistry

Silver has an average atomic mass of 107.9 u and is known to have only two naturally occurring isotopes. If 51.84% of Ag exists as Ag-107 (106.9051 u), what is the identity and the atomic mass of the other isotope?

40. ## dps

An angle is 25 degree less than the complement find its measure

41. ## chem

if a car produces 81g of {\rm CO_2}, how many grams of {\rm O_2} are used up in the reaction? the complete chem reaction is C2H6O+3O2--->2CO2+3H2O

a music store buys compactc discs for $12 each and sells them for$15 each. what is the percent of markup on these compact discs

asked by rawr... im a dinosaur.... rawr

65. ## science[physics]

three masses 3kg,4kg,5kg are located at corners of an equilateral triangle of side 1m.locate the centre of mass of the system

66. ## Trig

According to science, the fastest speed possible for anything is the speed of light. The speed of light is about 186,000 miles per second. That means that in one minute, light travels 11,160,000 miles. The star nearest Earth is the Sun. It's about

68. ## Algebra 1

Solve for b 3a + 2b = c

69. ## Math Statistics

Czarina is working part time at a pastry shop baking cupcakes. If she works for 30 hour in one week on the average, how many hours a day does she work?

70. ## Math Statistics

What is the difference between "weighted mean" and "arithmetic mean?"

suppose that a car normally sells for $16,500 and is now on sale for$14000. what is the percent of discount. 17.9%??

asked by rawr... im a dinosaur.... rawr
72. ## US Government

1. What was a major contributor to the increase in problems related to health, education, housing, and other social issues? 2. As part of the admission process, delegates must be elected to draft what document? Ans: The constitution? 3. The powers of the

73. ## Math

Prove by induction that 9^(n+2)- 4n is divisible by 5 for n greater than or equal to 1. Thanks.

74. ## american government

Consider the following features of Congress (including some that no longer apply), and discuss the policy implications of each. Does they (a) lead to more or less logical and coherent policies? (b) lead to more or less representation of various local and

75. ## Physics URGENT!!!

Gayle runs at a speed of 9.00 m/s and dives on a sled, initially at rest on the top of a frictionless, snow-covered hill, that has a vertical drop of 20.0 m. After she has descended a vertical distance of 4.00 m, her brother, who is initially at rest, hops

76. ## Math Statistics

Czarina is working part time at a pastry shop baking cupcakes. If she works for 30 hours in one week on the average, how many hours a day does she work if she works 5 days a week?

77. ## Modern world studies

7. The French philosopher Baron de Montesquieu believed that the power of a government __________.

78. ## maths

by equating the coefficients of sin x and cos x , or otherwise, find constants A and B satisfying the identity. A(2sinx + cosx) + B(2cosx - sinx) = sinx + 8cosx I got A = 2, B = 3, which the answers said were correct. However, another part of the question

79. ## chemistry

Consider the formation of cyanogen c2n2 and its subsequent decomposition in water given by the equations 2Cu2+ + 6CN- 2[Cu(CN)2]- + C2N2 C2N2 + H2O HCN + HOCN How much hydrocyanic acid HCN can be produced from 35.00 g of KCN, assuming 100% yield?

80. ## social studies and government

what were the arguments between marbury and madison.

81. ## Physics (Difficult)

A uniform rectangular bar with cross-section 66 mm x 54 mm and of length 1.7 m has mass 16kg. It pivots about an axis prependicular to the wider face. The axis is equidistant from the edges and 170 mm from one end. What is the relevant second moment of

82. ## math

what is a set of atleast twelve numbers that have the following landmarks: maximum:8 Range:6,mode:6,median:5 Show a bar graph of the data

83. ## math

what is a set of atleast twelve numbers that have the following landmarks: maximum:8 Range:6,mode:6,median:5 Show a bar graph of the data

84. ## algebra

factor the expression by using areas X^2+2x-3 solve the inequality (enter infinity for and infinity for-8 as needed.7 is less and equal 2-y

85. ## Ap Chemistry

What is the energy of a photon corresponding to radio waves of frequency 1.465 106 /s?

86. ## english 11

example of situation irony in act iii of the crucible

product 108and 4 find product 324 and 4

88. ## Ms. Sue... Thank you for your help.

Ms. Sue, I just wanted to say thank you for your help on all y math questions today. It really helped and I greatly appreciate it. thank ya, ♥dino♥

asked by rawr... im a dinosaur.... rawr

I am doing a research paper on the opium wars in China. Any suggestions for key points for thesis statement?

90. ## College Math

Find the area of a rectangle if three of its corners are (-3.7, -3.1), (1.2, -3.1), and (1.2, 5.3). Hint: find the 4th corner first.

91. ## algebra

A heating duct has a rectangular cross section whose area is 40(inches squared). If it is 3in longer than it is wide then what is its length and width. i need both equation and answer

92. ## College Math

A clarinet factory wants to maximize profits. They can produce 250 clarinets per week at a cost of $300 per clarinet, and sell them for$1000 per clarinet. And, they can produce 350 clarinets per week at a cost of $275 per clarinet, and sell them for$900

93. ## English - Writing Sentences & Paargraphs

Can you please review my revised paragraph? I have been working on this for two weeks. Need help! thanks so much Your favorite cousin has moved to your town and is looking for a job. Her previous experiences are working as a cashier and sales clerk at two

94. ## chemistry

A cylinder with a moveable piston has a volume of 18.7 L at a pressure of 1.2 atm. What will be its volume if the pressure is increased to 1.7 atm?

95. ## math

the value of a piece of land is increased by 20 percent if now it worth 15 lac ,what is the originalprice of the land

The initials "L.S." at the end of a document mean?

97. ## English - Writing Sentences and Paragraphs 1

Please help! I have been working on this for two weeks! I have read the book several times. I need to turn this is soon. I took all of your suggestions into consideration and basicallly rewrote the entire paragraph. Please review again... thanks This is

98. ## physics

A 1400 kg car takes a 50 m unbanked curve at 14 m/s. What is the size of the friction force on the car?

99. ## College Math

A temperature of 38 degrees Fahrenheit (F) is equivalent to 276.483 degrees Kelvin (K), while a temperature of 75 degrees F is equivalent to 297.039 degrees K. (a) Using the algebra methods from this class, find the equation converting Kelvin temperature

100. ## College Math

Find an equation in slope-intercept form passing through the points (-4.7, 16.3) and (-2.9, 16.3). Hint: first find the slope!

101. ## College Math

Using EZgraph, graph the following equations; calculate the slope, x-intercept, and y-intercept, and label the intercepts on the graph. 3. 4.9x – 7.2y = 2.3 4. 2x = -8 5. 3.7x + 4.2y = 5.03

102. ## College Math

Find the area of a rectangle if three of its corners are (-3.7, -3.1), (1.2, -3.1), and (1.2, 5.3). Hint: find the 4th corner first.

103. ## math

The weekly demand for the Pulsar 25 color LED television is represented by p, where p denotes the wholesale unit price in dollars and x denotes the quantity demanded. The weekly total cost function associated with manufacturing the Pulsar 25 is given by

104. ## english

Henry’s desire to win is obvious. Is it a: gerund infinitive prepositional participial

105. ## Physic

A bullet with a mass of 4.0 g and a speed of 736 m/s is fired at a block of wood with a mass of 0.075 kg. The block rests on a frictionless surface, and is thin enough that the bullet passes completely through it. Immediately after the bullet exits the

106. ## English

In “Do Not Go Gentle into That Good Night,” Dylan Thomas urged his father to resist? aging. despair. quitting. death.

108. ## Algebra 2

(18-n)^(1/2)=(n/8)^(1/2)

109. ## english

How does Dante feel about the journey he’s about to take with Virgil? worse than before he talked with Virgil better now that he’s talked with Virgil unsure excited

110. ## perimeter and area

what is 800cm times 15cm help me find the area cm2

111. ## maths

if tn=2n what are the first four terms of thepattern

112. ## government

How has the presidency role changed since it's inception to today? How has the public's perception of the presidency changed?

113. ## Physics

A skier of mass 79.1 kg, starting from rest, slides down a slope at an angle q of 38 with the horizontal. The coefficient of kinetic friction, m, is 0.09. What is the net work (the net gain in kinetic energy) done on the skier in the first 8.9 s of

114. ## chemistry

How many grams of C3H18O2 contain 7.9 e25 atoms of Carbon?

115. ## science- physics

A rotating wheel requires 4.17 s to rotate through 37 rev. Its angular speed at the end of the 4.17 s interval is 104 rad/s. What is its constant angular acceleration? Assume the angular acceleration has the same sign as the angular velocity.

116. ## Algebra

The number of hours of flight for 12 pilots: 11, 13, 5, 7, 5, 13, 18, 16, 5, 19 Find the mode, the median and the mean?

117. ## Chem

A gas is compressed from 73.7 L to 1.9 L at 0.70 atmospheres? In addition a total of 4400 J of heat are gained from warmer surroundings. What is the change in internal energy in kJ? I have a general idea of how to do this, but I tried and got -2851.8,

118. ## General Chemistry

What effect would tap water have on the volume of EDTA required for titration?

119. ## Algebra 2

(1/(n^2))+(1/n)=(1/(2(n^2)))

Three charges, q1=+45.9nC q2=+45.9nC and q3=+91.8nC are fixed at the corners of an equilateral triangle with a side length of 3.70cm. Find the magnitude of the electric force on q3.

121. ## Math 142

800 hundred chances are sold at $2 apiece for a raffle. There is a grand prize of$650 dollars, two second prizes of $250, and five third prizes of$50. First calculate the expected value of the lottery. Determine if the lottery is a fair game. If the game

122. ## Chemistry

How would you prepare 1000.0ml of 0.600M NaOH solution starting from concentration of 1.000M

123. ## Biology

Explain why the pH scale stretches between the numbers 0 to 14.

124. ## chemistry

calculate the moles of indicated product produced when 26.0g of each reactant is used. A. 4Al+3O2---->2AlO3 (Al2O3 B. 3NO2+H2O--->2HNO3+NO (HNO3)

125. ## Physics

30. A truck of mass 2250 kg is used to pull a 330 kg trunk out of an old quarry as shown below. There is 550 N of rolling resistance for the truck. Ignore mass and friction of the pulley. (a) If the trunk is accelerated upward at 2.00 m/s2 what is the

126. ## chemistry

Why Al(OH)3 precipitation is red ? Is this the result of electron transition? Thanks for your help :)

127. ## physics

Suppose for the nucleus of interest, the gyromagnetic ratio is ƒ× = 2.675x108 T-1 s-1 (radians is an implicit unit here) or ƒ×ƒ}ƒ¢ƒà = 42.58 MHz/T. If the applied magnetic field is 3T, determine the resonant frequency of the spins (in MHz or

128. ## MATH

FIND THE AREA OF A RECTANGULAR FROM MEASURING 10 INCHES BY 8 INCHES.

129. ## Math

Suppose C(x) measures an economy's personal consumption expenditure and x the personal income, both in billions of dollars. Then the following function measures the economy's savings corresponding to an income of x billion dollars. S(x) = x - C(x) (Income

130. ## Algebra 2

(2v-7)^(1/2)=v-3

131. ## English

Did I do these correctly? (This homework question was removed due to a copyright claim submitted by K12 Inc.)

132. ## math

The weekly demand for the Pulsar 25 color LED television is represented by p, where p denotes the wholesale unit price in dollars and x denotes the quantity demanded. The weekly total cost function associated with manufacturing the Pulsar 25 is given by

133. ## math

a boy 45 in tall casts a shadow 90 long. At the same time his father casts a shadow 144 in

134. ## Algebra

How do you graph x + 4y = 16

a toy company manufactures miniature cars. They sell 15 miniature sports cars in a box. They sell 12 miniature trucks in a box. Mrs. Murphy wants to buy an equal number of sports cars and trucks. What is the least number of miniature sports car she can

136. ## Math

How do simplify the expression (x-3)(2x-5) - (x+1)(x-6)=

a bond that has a 1000 par value (face value and a contract or coupon interest rate of 10.9%. the bond have a current market value of $1,120 and will mature in 10 years. the firm's marginal tax rate is 34%. the cost of captial from this debit is asked by michelle 138. ## Physics In 2.0 minutes, a ski lift raises 5 skiers at constant speed to a height of 190 m. The average mass of each skier is 65 kg. What is the average power provided by the tension in the cable pulling the lift? asked by 4319 139. ## physics a 1000kg car goes over the top of a hill with a radius curvature equal to 40.0m. At the top of the hill the normal force is 2,500 N. How fast is the car going? asked by Anonymous 140. ## Science when do human interventions in water availability pose serious problems to freshwater accessability? asked by Traci Davis 141. ## Physics A skier is traveling at a speed of 36.2 m/s when she reaches the base of a frictionless ski hill. This hill makes an angle of 15° with the horizontal. She then coasts up the hill as far as possible. What height (measured vertically above the base of the asked by Lily 142. ## Physics Consider the system of blocks in the figure below, with m2 = 5.0 kg and è = 33°. If the coefficient of static friction between block #1 and the inclined plane is ìS = 0.24, what is the largest mass m1 for which the blocks will remain at rest? asked by Lily 143. ## Physics A piece of wood with mass m = 2.7 kg is held in a vise sandwiched between two wooden jaws as shown in the figure below. A blow from a hammer drives a nail which exerts a force of 460 N on the wood. If the coefficient of static friction between the wood asked by Lily 144. ## Physics A car of mass 1396 kg is parked on a very slippery hillside (see figure below). To keep it from sliding down the hill (è = 15°), the owner attaches a cable. If there is no frictional force between the road and the tires, what is the tension in the cable? asked by Lily 145. ## Physics Consider a plane with a velocity relative to the air of 198 m/s in a westerly direction. If the wind has a speed relative to the ground of 56 m/s (in an easterly direction), how long does it take for the plane to travel from one city to another that is due asked by Lily 146. ## Physics ?_? The model airplane is being spun at a speed of 20 m/s on a horizontal circle of radius 17 m. The mass of the plane is 0.86 kg. The person holding the guideline pulls it in until the radius becomes 13 m. The plane speeds up, and the tension in the guideline asked by 4319 147. ## Math Which Statements of congruence are true and which are false and why? 177 _= 17 871 _= 713 1322 _= 5294 5141 _= 8353 13944 _= 8919 67 x 73 _= 1 x 3 17 x 18 x 19 x 20 _= 4! 83 (144 power) _= 15 (144 power) Their not equals signs...they are three lines on top asked by Jimmy 148. ## Algebra 1 Solve 7+x-15=-2 2/3 asked by Monica 149. ## Physical Science Phairade roul asked by Anonymous 150. ## MATH HOW MANY TIMES LONGER IS 15,000 THAN 3,750 asked by JESSICA 151. ## Algebra 1 -3 1/2= 1/2x+1/2x+x asked by Monica 152. ## physics Bonnie and Clyde are sliding 500 bank safe across the floor to their getaway car. The safe slides with a constant speed if Clyde pushes from behind with 385 of force while Bonnie pulls forward on a rope with 300 of force.What is the safe's coefficient of asked by Kris 153. ## physics 14. A racing car accelerates uniformly through three gears, changes with the following average speed: 20 for 2.0 s 40 for 2.0 s 60 for 6.0 s What is the overall average speed of the car? A. 12 B. 13.3 C. 40 D. 48 E. 37 asked by Anonymous 154. ## Intermidiate algebra a woman ivests in two bank accounts, one with a 3% percent interest and the other paying 9% simple interest per year.She puts twice as much in the lower account. Her annual interest is 7110. How much did she invest in each account? asked by jay 155. ## Science Calculate the molarity of the following solution: 7.48g of calcium chloride (CaCl2) in 215 mL of aquous solution. asked by Emily 156. ## simple alg 2!!! a=-2 b=3 |a+b|? solve asked by tyneisha 157. ## Science 10.0 g of KCl and 18.5 g of CaCl2 were dissolved in 500 mL of water. How many mL of 1.57 M AgNO3 solution would be required to precipitate all Cl- from the solution? asked by Jared 158. ## math In a problem on percentages there are three quantities that are involved. These are the base, the amount, and the rate percent. Express the relation between them in the form of an equation and explain with examples how to find each one of them given the asked by cecelia 159. ## Math I need help understanding truth tables please. asked by Ashley 160. ## Chemistry What is the enthalpy change (in kJ) for burning 49.0 g of methyl alcohol? I tried this question and got the wrong answer of 1047.74. A gas is compressed from 73.7 L to 1.9 L at 0.70 atmospheres? In addition a total of 4400 J of heat are gained from warmer asked by Anonymous 161. ## physics Three blocks are in contact with each other on a frictionless horizontal surface. A 696 N horizontal force is applied to the block with mass of 4.7 kg as shown in the ﬁgure below. The acceleration of gravity is 9.8 m/s 2 . 4.7 kg 5.5 kg 7.1 kg F a) What asked by Anonymous 162. ## Chemistry A solution of NaOH was obtained by dissolving 5.6g of NaOH pellets in 100cm^3 of water. What is the concentration of resulting solution? asked by HandsomeLala 163. ## chemistry For 6.0*10^-2 M H2CO3, a weak diprotic acid, calculate the following values. Use ionization constants of H2CO3: Ka1=4.4*10^-7, Ka2=4.7*10^-11, as necessary. PART A: [H3O^+] M PART B: [HCO3^-] M PART C: [CO3^2-] M asked by aliceallyx3 164. ## physics Three blocks are in contact with each other on a frictionless horizontal surface. A 696 N horizontal force is applied to the block with mass of 4.7 kg as shown in the ﬁgure below. The acceleration of gravity is 9.8 m/s 2 . 4.7 kg 5.5 kg 7.1 kg F a) What asked by Anonymous 165. ## physics Three blocks are in contact with each other on a frictionless horizontal surface. A 696 N horizontal force is applied to the block with mass of 4.7 kg as shown in the ﬁgure below. The acceleration of gravity is 9.8 m/s 2 . 4.7 kg 5.5 kg 7.1 kg ) What is asked by Anonymous 166. ## Social studies Posted by rfvv on Thursday, October 18, 2012 at 9:03pm. How many lakes does the National Trust in England have? It's hard to find the information about that on the Internet. About 136 lakes or 500 lakes? Would you let me know that or the website? Thank asked by rfvv 167. ## anth Describe how scientific racialism was manifest in legislation, court decisions, and US policies between 1850 and 1924 that include immigration restriction from Europe and Asia. asked by Anonymous 168. ## physics What is magnitude asked by Anonymous 169. ## math In a problem on percentages there are three quantities that are involved. These are the base, the amount, and the rate percent. Express the relation between them in the form of an equation and explain with examples how to find each one of them given the asked by cecelia 170. ## Math Statistics The table below shows Rico’s grades during the third term in four subjects. Subject Units Grade Math 1.5 98 Science 2 97 English 1.5 95 A.P. 1 99 What was Rico’s average grade in the four subjects? asked by Milen 171. ## Algebra Grade 7 How do you find the sales tax? How do you find the discount price? Please help me, I really appreciate it. This is for studying and I am completely stuck. Thanks in advance to any and all help.. luv ya, ♥dino♥ asked by rawr... im a dinosaur.... rawr 172. ## physics Three blocks are in contact with each other on a frictionless horizontal surface. A 696 N horizontal force is applied to the block with mass of 4.7 kg as shown in the ﬁgure below. The acceleration of gravity is 9.8 m/s 2 . 4.7 kg 5.5 kg 7.1 kg d) What is asked by Anonymous 173. ## chemistry how to find ph of aqueous solution if your only given the concentration asked by aliceallyx3 174. ## 7th grade literature help please ASAP Ms.Sue? I need to write a paper for school. The directions are: "Research to find how the following connect to the author, Kurt Vonnegut, Jr.: Cloud seeding, World War II, Purple Heart, Kilgore Trout. Include any other interesting facts." So far, this is what I've asked by Delilah 175. ## physics After you pick up a spare, your bowling ball rolls without slipping back toward the ball rack with a linear speed of v = 3.27 m/s To reach the rack, the ball rolls up a ramp that rises through a vertical distance of h = 0.572 m. What is the linear speed of asked by Emily 176. ## chemistry 1. How many grams of NaCl are present in 15 mL of a 2.0% solution? asked by alexa 177. ## Algebra Grade 7 Matt and Michelle enjoy a romantic evening at The Golden Lamp. They spent$40. The waiter has done an excellent job, and they want to leave him a nice tip of 15%. As generous restaurant patrons, they will tip the waiter after the tax of 7% is calculated.

asked by rawr... im a dinosaur.... rawr
178. ## physics

a scared kangaroo clears a fence that is 2.44 meters tall. what is the vertical component of the kangaroos velocity at take off (vfi) ? if the horizontal component of the kangaroos velocity is 4.80m/s at what angle did the kangaroo take off the ground?

179. ## Physics

You have a 40 inch wheel tow 20 inch wheel to a 5 inch wheel how many revolutions does the 5 inch wheel have to make to make the 49 inch wheel rotate 1revolution?

180. ## chemistry

Porassium alum is 3.9 parts per 100 parts of water. Knowing this, how many moles of potassium alum are present in 50ml?

181. ## algebra

the mid point of a segment joining (a,b) and (-3,4b) is (2,3a+4).find a & b.

182. ## Math

If I found 52 feet of board and build a triangual garden using all of the board. If the largest side is 4 more than 4 times the smallest and the other side 3 times the smallest, how long will each side be?

183. ## Chemistry

A hot air balloon has a volume of 55,287 m3 at 60C, what is its volume at 20C?

184. ## Physics

If you have a 40 inch wheel connected to a 20 inch wheel connected to a 5 inch wheel how many rotations need to make in order for the 40inch wheel to make 1rotation?

185. ## maths

For i; j 2 N let (i; j) denote the ordered pair in the cartesian product N  N and fi; jg  N the subset consisting of the elements i and j. De ne the sets A and B as follows: A := f;; 1; 2; (1; 3); (3; 1); f1; 3g; f3; 1gg, B := f3; (1; 2); (2; 1); f1; 2g;

186. ## maths

Find x in the following expressions: 1. (111)10 = (x)3;

187. ## Chemistry

A radio wave has a frequency of 3.6 x 10^10 Hz. What is the energy (in J) of one photon of this radiation?

188. ## grammar

What is the verb in this sentence? Unlike rita, she had very few friends.

189. ## maths

Find g := gcd(389; 222) and a; b 2 Z such that g = a  389 + b  222.

190. ## algebra

mike's automall has 130 cars on clearance all either red blue or green. there are four times as many red as green, and twice as many blue as red. how many of each color do they have

191. ## maths

Let m; n; z 2 N such that m and n divide z and gcd(m; n) = 1. Prove that m  n divides z.

192. ## Health

in the easiest explantion what does the bacteria streptococcus do? thanks

193. ## science

Will the current flow when neutron or proton are in the place of electron.if yes , then explain how and if answer is no then describe why.

194. ## algebra

A furnace duct forks into 2 ducts. Flow coming in is 2300cfm. If flow coming in 1 duct is 800cfm more than other what is flow to each duct in cfm

195. ## physics

Identical twins, each with mass 59.6 kg, are on ice skates and at rest on a frozen lake, which may be taken as frictionless. Twin A is carrying a backpack of mass 12.0 kg. She throws it horizontally at 3.00 m/s to Twin B. Neglecting any gravity effects,

196. ## Physics

A trunk of mass m = 1.100 kg is pushed a distance d = 32.0 cm up an incline with an angle of inclination theta = 26.0 ° by a constant horizontal force P = 150. N. The coefficient of kinetic friction between the trunk and the incline is 0.330. a) Calculate