# A charge +Q and -2Q were placed on first and third of three very large parallel plates. The middle plate is earthed. Find the chargeon right extreem plate

17,079 questions, page 96
1. ## physics

Im trying to study for my physics exam by doing some extra problems, however im stuck with this one. any help is much appreciated Two tiny spheres have the same mass and carry charges of the same magnitude. The mass of each sphere is 4.62 x 10-6 kg. The

asked by John on September 28, 2012
2. ## Math

A television company agrees to establish a community antenna in a new suburb at a charge of \$5 each for 1000 subscribers or less.To encourage more subscribers,it is agreed to give a discount of \$ 0.10 to each subscriber for every additional 10 subscribers

asked by Alisha on April 1, 2015
3. ## Physics

Packing material made if pieces of foamed polystyrene can easily become charged and stick to each other. Given that the density of this material is about 35 kg/m^3, estimate how much charge might be on a 2.5 cm diameter foamed polystyrene sphere, assuming

asked by Yanka on September 7, 2015
4. ## College math

Can someone please assist me The problem reads "use the rule of 78 to find the payoff amount for the loan paid in full before the date" Finance charge: \$717 Total number of payments 41 Amount per payment \$155 Remaining payments when paid in full 10 Please

asked by Meg on February 22, 2013
5. ## pre-algebra

a local newspaper can be ordered for delivery on weekdays or sundays. a weekday paper is 35 cents and the sunday edition is \$1.50. the stadles ordered delivery of the weekday papers.the month of march had 23 weekdays and april had 20. how mach should the

asked by cayla on October 7, 2013
6. ## capacitor

A capacitor is made up of two metal plates, each having an area of 0.02 m2 and spaced 2.5 mm apart. A potential difference of 250 V across the plates establishes a charge of 50 nC. Calculate: a) The electric field strength, b) The electric flux density, c)

7. ## Calculus

This is a large problem, sorry for the trouble. if f(x) = sqrt(x^3 + 5x + 121)(x^2 + x + 11) Find fprime/derivative of/at 0 I keep getting 16 which is not one of the multiple choice answers available. My last step is [sqrt(121)(1)] + [{5/sqrt(121)}(11)]

asked by Anonymous on October 29, 2008
8. ## roslyn

Margo's soccer coach brought a large bag of watermelons to practice. The mass of the bag with all the watermelons in it was 12 kilograms. Explain how you could use estimation to figure out how many watermelons are in the bag.

asked by Jennifer on April 24, 2013
9. ## Social Studies

Summarize the major factors that allowed the Incas to conquer and rule their large empire. Some suggest that, in many ways, the Incas were like the Romans or other Pre-Columbian American Civilizations. Evaluate whether they were more similar or different,

asked by Jennifer on January 6, 2013
10. ## physics

A large grinding wheel in the shape of a solid cylinder of radius 0.330 m is free to rotate on a frictionless, vertical axle. A constant tangential force of 210 N applied to its edge causes the wheel to have an angular acceleration of 1.161 rad/s2. (a)

asked by Anonymous on November 9, 2011
11. ## physics

A large grinding wheel in the shape of a solid cylinder of radius 0.370m is free to rotate on a frictionless, vertical axle. A constant tangential force of 470 N applied to its edge causes the wheel to have an angular acceleration of 0.800 rad/s2. (a) What

asked by Anonymous on November 11, 2012
12. ## history 103

Summarize the major factors that allowed the Incas to conquer and rule their large empire. Some suggest that, in many ways, the Incas were like the Romans or other Pre-Columbian American Civilizations. Evaluate whether they were more similar or different,

asked by lucille on October 22, 2012
13. ## math

6. A lottery offers two options for the prize. Option A: \$1000 a week for life Option B: \$ 600 000 in one lump sum. The current expected rate of return for large investment is 7%/a, compounded weekly. a. Which option would the winner choose if s/he expects

asked by stephy on January 20, 2011
14. ## Chemistry

1. A small piece of zinc reacts with dilute HCl to form H2, which is collected over water at 16°C into a large flask. The total pressure is adjusted to barometric pressure (752 torr), and the volume is 1538 mL. Use Table 5.2 to help calculate the partial

asked by Carter on October 18, 2010
15. ## Geography

Need Help! 14. How has Italy's economy changed since 1950? a. Italy has withdrawn from the European Union b. Farming and tourism have become Italy's most important economic activities c. More people are working in manufacturing and service industries d.

asked by y912f on February 8, 2010
16. ## Physics

Please Help me on these: 3. What mathematical expression tells you to what percentage the charge is after n t1/2's? (All these should be multiplied by 100% to obtain the percentage.) 2- n V*C e-t/τ R*C 1 - 2^- n ((((((((((( I think this is right what do

asked by Ramin on March 7, 2012
17. ## Roman Circus

A large, usually oblong or oval, roofless place, surrounded by tiers of seats rising one above another, for chariot races, public games, etc. People from upper and lower classes could attend. When do games were being held, musicians like flute players

asked by running.from.myself on March 2, 2012
18. ## Negotiations

Based on the following information below: Listed price of the house-\$329,000 Square feet-3600 Rooms -10 Bed rooms -4 finished basement- No Baths -2.5 garages -2 car garage time on the market -6 months miscellaneous-large wooded lot, pantry, all brick

asked by Lola on June 17, 2011
19. ## Chemistry

I'm stuck on the concept of negative and positive charges. A dish has 10 + charges and 10 - charges. 2 of the negative charges are taken away. What is the overall charge? I think the answer is 2+ charges

asked by Glenn on September 9, 2008
20. ## Math

1. Name a pair of complementary angles. (1 point) 1 and 4 1 and 6 3 and 4 4 and 5 2. If m1=37°, what is m4? (1 point) 53° 43° 37° 27° 3. If m1 = 40°, what is m5? (1 point) 50° 40° 35° 25° Use the figure to answer questions 4–5. Assume that

asked by YRN DJ on December 17, 2015
21. ## College physics

A toy car has a mass of 120g, including two 1.5 V batteries connected in series. Suppose the motor that drives the car is 80\% efficient (i.e., 80\% of the electric energy goes to the drive wheels, 20\% is dissipated as heat) and that friction and air

asked by katie on July 17, 2010
22. ## Physics

Two identical balls each have a charge of -7.5x10^-6C. The balls hang from identical strings that are 8‹ from the vertical because of the repulsive force between the charged balls. The balls are separated by a distance of 10cm. What is the tension in

asked by Physics... on January 31, 2013
23. ## physics

An athlete at the gym holds a 4.33 kg steel ball in his hand. His arm is 68.7 cm long and has a mass of 4.69 kg. What is the magnitude of the torque about his shoulder if he holds his arm straight out to his side, parallel to the floor? Torque = massball x

asked by Vishnu on October 11, 2008
24. ## Math

The total resistance of two circuits in parallel is 15 ohms and one circuit has five times the resistance of the other, find the resistance of each circuit. Use 1/R=1/R1+1/R2. R1 and R2 are two individual resistances. a)Find the smaller resistance b)Find

asked by Megan on March 12, 2013
25. ## physics

Background pertinent to this problem is available in Interactive LearningWare 18.3. A uniform electric field exists everywhere in the x, y plane. This electric field has a magnitude of 5700 N/C and is directed in the positive x direction. A point charge

asked by namabia on November 18, 2014
26. ## Math

Terry and Ed start a lawn mowing business and purchase the mowers and equipment for \$1,300. They charge \$15 for each lawn and use \$2 worth of gas for each job. How many lawns must Terry and Ed mow before breaking even? a. 10 lawns b. 50 lawns c. 100

asked by Kaai97 on January 19, 2016
27. ## Physics

Alex is exploring a cave that has a slight incline and is iced over, forcing her to use ice cleats to explore it. After climbing 50 m into the cave, she finds what she is looking for and she takes out her ice pick and hammer to begin removing the stones.

asked by bri on November 29, 2015
28. ## physics

please check my answers and help me with the first one. how can you charge an object negatively with only the help of a positively charged object? -This one I am not too sure, when one material is rubbed against another electrons jump readily from one to

asked by Soly on November 6, 2007
29. ## Organic Chemistry

This compound is characterized by ionic bonding between a group 1 metal cation and a tetrahedral anion. Write an appropriate Lewis structure for the anion and a specify a formal charge if there is one. NaBF4 I looked up the answer and I have a few

asked by Aletha on January 21, 2008
30. ## Math

Monica paid sales tax of \$1.50 when she bought a new bike helmet. If the sales tax was 5% how much did the store charge for the helmet before tax?

asked by Makenzey on January 28, 2015
31. ## Physics

When a rubber rod is rubber with wool, the rod becomes negatively charged. What can you conclude about the magnitude of the wool's charge after the rubber process? Why? Please Help!!

asked by Anonymous on March 25, 2014
32. ## Physics

When a rubber rod is rubber with wool, the rod becomes negatively charged. What can you conclude about the magnitude of the wool's charge after the rubber process? Why? Please Help!!

asked by Anonymous on March 25, 2014
33. ## STATISTICS

According to the Central Limit Theorem, The traditional sample size that separates a large sample size from a small sample size is one that is greater than 100 30 500 20

asked by John on June 10, 2010
34. ## Stastics

A doctor at a local hospital is interested in estimating the birth weight of infants. How large a sample must she select if she desires to be 98% confident that the true mean is within 2 ounces of the sample mean? The standard deviation of the birth

asked by WEB on November 5, 2011

What are some large-scale economic shifts that have created our present service economy? What are some more recent developments that have given rise to our business environment? How would you characterize the most important elements of customer service in

asked by Shannon on October 17, 2018
36. ## Statistics

A nurse at a local hospital is interested in estimating the birth weight of infants. How large a sample must she select if she desires to be 99% confident that the true mean is within 2 ounces of the sample mean? The standard deviation of the birth weights

asked by Clifford on March 8, 2013

The number of immigrants living in a certan country with a large population makes up 20 percent of the population. in a random sample poll of 100 people what is the expected number of immigrants to be polled? (using bionomial distribution) thanks!

asked by linda on November 29, 2011
38. ## Afford

If a narrower can afford to make monthly principal and interest payment of \$1,000 and the lender will make a 30 year loan at 8-1/2%=7.69 using amortization table. how large a loan(rounded to the nearest \$100) can this buyer afford?

asked by Linette on August 1, 2015
39. ## Math 209

If a cylindrical container has a volume of cubic feet, then its surface area S in square feet (excluding the top and bottom) is given by S = s=(2π )/r where r is the radius of the cylinder. (a) Calculate S when r =1/2 foot (b) What happens to this surface

asked by DeLynn Stewart on July 9, 2011
40. ## Science

Niles Eldredge found evidence in trilobite fossils of a pattern of evolution in which short periods of large change or mixed with longer periods of little or no change. This Pattern Is Called ___________? I'm stumped on this question, can anyone help me?

asked by Gavin on May 2, 2014
41. ## English

Choose the answer that best matches the word "hindquarters." The farmer had to remove a large thorn from the horse's hindquarters. a. chest b. hoof c. front leg d. rear leg*** Just checking my work:) *** - My Answer Thanks, Kaai97

asked by Kaai97 on November 19, 2015
42. ## Customer Relations and servicing

What are some large scale economic shifts that have created our present service economy? What are some more recent developments that have given rise to our business environment? How would you characterize the most important elements of customer service in

asked by Shasta on August 15, 2017
43. ## Physics

A 1.75-kg wooden block rests on a table over a large hole as in the figure below. A 5.20-g bullet with an initial velocity vi is fired upward into the bottom of the block and remains in the block after the collision. The block and bullet rise to a maximum

asked by Ana on November 30, 2014
44. ## physics

A 1.75-kg wooden block rests on a table over a large hole as in the figure below. A 4.60-g bullet with an initial velocity vi is fired upward into the bottom of the block and remains in the block after the collision. The block and bullet rise to a maximum

asked by jeezy on March 25, 2012
45. ## math

A school has purchased a large field that has a square area of 19,500 ft2. What is the approximate length of each side of the square area? Round your answer to the nearest foot. a. 140 ft c. 142 ft b. 139.64 ft d. 139 ft

asked by daniel on July 17, 2014
46. ## physics

A triangular plate with a non-uniform areal density has a mass M=0.700 kg. It is suspended by a pivot at P and can oscillate as indicated below. Its center of mass is a distance d=0.200 m from the pivot axis and its moment of inertia about an axis through

asked by liv on December 4, 2011
47. ## math

Suppose x is a random variable with mean and standard deviation. If a large number of trials is observed, at least what percentage of these values is expected to lie beween mean-2(standard deviation) and mean + 2(standard deviation) could someone help me

asked by jake on April 9, 2009
48. ## AP Chem ?

I had posted this question before and wanted to know if I had gotten the right answers. We have to identify the five compunds of H, N, and O described below. For each compound, I have to write a Lewis structure that is consistent with the information

asked by Sam on December 3, 2006
49. ## chemistry

In what ways is the large scale generation of sulfur oxides easier to control than the generation of nitrogen oxides? and in what ways is it more difficult? please help me

asked by Maya on April 10, 2008
50. ## Algebra 1

Alisha is paying \$20 for a large pizza,which is 18 inches in diameter, a better buy than paying \$5 for a personal size pizza that is 6 inches across?Explain

51. ## Statistics #3

The estimate of the population proportion is to be within plus or minus .10, with a 99 percent level of confidence. The best estimate of the population proportion is .45. How large a sample is required?

asked by Monique on June 11, 2008
52. ## math

A recipe for one large cake calls for 3 2/3 cups of flour. Anya has decided to increase each ingredient in the recipe by 2 1/2. How many cups of flour does she need?

asked by peter on March 8, 2012

creating a slide that will have a large and a number of bullet points below it. what slide format should she use? A.)comparison B.)title and content C.)title only D.)two content

asked by Anonymous on February 15, 2015
54. ## 2012faCJC-111-NWB1

Why is public order necessary? Do we have enough public order or too little? How can we tell? What might a large, complex society such as ours be like without laws and without a system of criminal justice? Would you want to live in such a society? Why or

asked by Anonymous on October 19, 2012
55. ## MLA citation

Of the following, which is the most important to consider when analyzing and revising an academic paper? A. That the paper will be entertaining for the instructor to read B. That the thesis is clear and that the main points support that thesis C. That the

asked by Daniela on July 27, 2015
56. ## Civics ASAP PLZ =:)

which of the following would you expect to find in a mixed market economy? large corporations run by the government a king who has unlimited power to regulate production corporations that are not subject to any government regulation a government minimum

asked by Anonymous on June 1, 2015
57. ## Physics

The electric field from an infinitely large and uniformly charged sheet is independent of the distance from the sheet, yet the individual charges in the sheet all produce fields that object the inverse square law. Why doesn't the field get weaker at

asked by Timothy on February 20, 2017

microscopic examination of a tissue reveals an open framework of fibers with a large volume of fluid ground substance and elastic fibers. this tissue would most likely have come from the? A. Inner wall of blood vessel B. lungs C. Spleen D. Tissue E. bony

asked by Talan on September 16, 2013
59. ## Physics

A physics teacher (mass = 84.5 kg) is jogging through the woods and runs straight into a large oak tree at 3.5 m/s. Rebound speed is measured at 2.3 m/s in the opposite direction. If the time of contact with the tree is 45 milliseconds, what is the

asked by Will on March 18, 2013

microscopic examination of a tissue reveals an open framework of fibers with a large volume of fluid ground substance and elastic fibers. this tissue would most likely have come from the? A. Inner wall of blood vessel B. lungs C. Spleen D. Tissue E. bony

asked by Talan on September 16, 2013
61. ## math 117/algebra

The combined resistance of two resistors R_(1 amd R_2 )in a parallel circuit is given by the formula R_(r= 1/(1/R_1 + 1/R_2 )) Simplify the formula. Help what is this talking about and how do I work it? find R as a function fo r`1 and r2. 1/R= 1/r1 + `1/R2

asked by Diana on July 11, 2007
62. ## chemistry

My work: pH = -log(x) = 4.49 x = 3.2359e-5 3.2359e-5 = 5.72/M When I solved for M, I got that large number... 176764.8987 Ka for a given weak acid is 5.72 x 100. What concentration of acid (mM/L) will give a pH of 4.49? I got 176764.8987 M (not converted

asked by Meche on February 28, 2007
63. ## Physical science

A copper penny has a mass of of 3gram. The atomic number of copper is 29 and the atomic mass is 63,5gram/mol.what is the total charge of all electrons in the penny?

asked by Lucia on March 11, 2012
64. ## math

If a contractor pays an average wage of \$20.00 per hour and wants to make a 15% mark-up on the cost of labour, what will the contractor charge as an average labour cost on contracts?

asked by Jason on July 5, 2012
65. ## Physics

A proton is launched from the surface of a 2.0 cm diameter glass sphere that is charged to -25.0 nC. What is the speed of the proton when it is launched so that it just escapes the influence of the charge of the glass sphere?

66. ## Physics

In Fig. 25-37, V = 12 V, C1 = 9.8 µF, and C2 = C3 = 18 µF. Switch S is first thrown to the left side until capacitor 1 reaches equilibrium. Then the switch is thrown to the right. When equilibrium is again reached, how much charge in Coulombs is on

asked by Gina on March 19, 2012
67. ## Math

The charges on a monthly water bill came to \$0.86 per cubic meter of water used, plus a service charge of \$4.49. Last month Jeremy's water bill came to \$69.85, how many cubic meters of water had he used?

asked by Erica on January 25, 2013
68. ## Math

f a contractor pays an average wage of \$20.00 per hour and wants to make a 15% mark-up on the cost of labour, what will the contractor charge as an average labour cost on contracts?

asked by Anonymous on March 23, 2015
69. ## physics

A wire with circular cross-section of radius 1mm carries a current of The speed of the carriers inside the wire is What is the current density in the wire? the charge density in the wire and how long it takes for an Avogadro’s number of charges to emerge

asked by JAY Z on October 16, 2014
70. ## algebra

Ashley is going to rent a truck for one day. There are two companies she can choose from, and they have the following prices. Company A charges \$95 and allows unlimited mileage. Company B has an initial fee of \$75 and charges an additional \$0.80 for every

asked by heather on December 21, 2016

Which statement presents a negative element in a positive way? (Points: 5) The part can be replaced at no charge only if your unit is less than two years old. If your unit is too old, you will have to pay \$49 for a replacement part. We cannot replace the

asked by lisa on November 5, 2010
72. ## college gen. physics II

38. A proton initially moves left to right long the ´‑axis at a speed of 2 ´ 103 m/s. It moves into an electric field, which points in the negative ´ direction, and travels a distance of 0.2 m before coming to rest. If the proton's mass and charge are

73. ## Anonymous

Maya is going to rent a truck for one day. There are two companies she can choose from, and they have the following prices. Company A charges and allows unlimited mileage. Company B has an initial fee of and charges an additional for every mile driven. For

asked by Anonymous on March 17, 2011
74. ## Algebra II

Ravi is going to rent a truck for one day. There are two companies he can choose from, and they have the following prices. Company A charges \$75 and allows unlimited mileage. Company B has an initial fee of \$55 and charges an additional \$0.80 for every

asked by Bryan on April 2, 2014
75. ## Algebra 2

A resistor has a resistance of 15 ohms. What size of resistor, (r2), should be connected in parallel with it to obtain a resistance of 7 ohms. Use 1/R=1/r1+1/r2. r2= ohms?

asked by Nancy on April 5, 2012
76. ## algebra 2

Petra needs to find the equation of a line through (–2, 3) that is parallel to the line represented by y = 2x– 4. Which equation best represents Petra's equation?

asked by Lalt on February 10, 2012
77. ## ALGEBRA

Calculate the monthly finance charge for the following credit card transaction. Assume that it takes 10 days for a payment to be received and recorded and that the month is 30 days long. (Round your answer to the nearest cent.) \$500 balance, 20% rate, \$50

asked by MONICA on November 23, 2011

Molly Ellen, bookkeeper for Keystone Company, forgot to send in the payroll taxes due on April 15. She sent the payment November 8. The IRS sent her a penalty charge of 8.80% simple interest on the unpaid taxes of \$3,600. Calculate the penalty. (Remember

asked by Anonymous on November 25, 2014
79. ## physics

7150/(33.5e4) = g ice doesn't work. Am I calculating incorrectly? heat of fusion for water is 334 J/g. You want it in J/g since q is given in the problem in J. The answer will be in units of grams of ice. You will need to change to kg since the problem

asked by Ann on December 12, 2006
80. ## physics

You are watching an archery tournament when you start wondering how fast an arrow is shot from the bow. Remembering your physics, you ask one of the archers to shoot an arrow parallel to the ground. Unfortunately the archer stands on an elevated platform

asked by bobjahng2 on November 16, 2010
81. ## physics

You are watching an archery tournament when you start wondering how fast an arrow is shot from the bow. Remembering your physics, you ask one of the archers to shoot an arrow parallel to the ground. Unfortunately the archer stands on an elevated platform

asked by alejandrob on November 17, 2010
82. ## Art

The jeweler set a ring so that the green of the emerald contrasted with the white of the diamonds. He decided that adding the large, costly stone was worth it a. because of the archival quality of the stone b. for aesthetic reasons•• c. to show his

asked by Vanessa on February 1, 2016
83. ## Ap world history

I population increase and East Asia and South East Asia during this timeframe was due in large part to.. A) The lack of wars B)The growing respect for a woman C) The spread of Buddhism,hey religions that encourages procreation D) The development of a

asked by Brenda on September 16, 2015
84. ## physics

A large wooden wheel of radius R and the moment of inertia I is mounted on an axle so as to rotate freely. A bullet of mass m and speed v is shot tangential to the wheel and strike its edge, lodging in the wheel’s rim. If the wheel was originally at

asked by Gee on December 4, 2010
85. ## Social Studies

Why was Chandragupta Maurya's organization of his empire considered efficient? A. His severe punishments for crimes were considered normal. B. His taxes paid for a large army and his costly life style. C. His envoys were sent on missions to neighboring

asked by Bri on October 14, 2018
86. ## nutrition

After World War II, farming, fishing, and other food production activities became large scale enterprises which caused Question 5 answers a decrease in economic development. American diets to become less diverse. the over producing and over consuming of

asked by destiny on September 29, 2010
87. ## earth science

22. an illustration of the fact that a sudden and great _____ struck the earth is the millions fo mammoths and other large animals frozen instantly and preserved, whole and undamaged. catastrophe cold front ice age permafrost ice age right This also makes

asked by tiff on April 4, 2007
88. ## chemistry

suppose that a large volume of 3% hydrogen peroxide decomposes to produce 12mL of oxygen gas in 100 s at 298 K. Estimate how much oxygen gas would be produced by and identical solution in 100s at 308 K hi can you please help me set up this problem, then I

asked by Chloe on August 6, 2015
89. ## Chemistry

Which of these is more efficient on a large/small scale (power generation) and why? burning hydrogen to generate heat to drive turbines to produce electricity or directly producing electricity in a fuel cell reaction Can hydrogen be piped into homes,

asked by Alicia on May 8, 2011
90. ## physics

A large, solid metal sphere is suspended from a the ceiling by a cable, and is free to rotate about the wire. If the mass of the sphere is 176 kg, its radius is 0.7 m, and it is initially rotating at 28 rpm (revolutions per minute), what work is required

asked by john on November 15, 2011
91. ## AP PHYSICS

A 3.0-uF capacitor and a 4.0-uF capacitor are connected in series across a 40.0-V battery. A 10.0-uF capacitor is also connected directly across the battery terminals. Find the total charge that the battery delivers to the capacitors. I NEED HELP WITH THIS

asked by Becky on April 1, 2008
92. ## physics

Four charges are placed at the four corners of a square of side 15 cm.The charges on the upper left and right corners are +3 uC and -6 uC respectively. The charges on the lower left and right corners are -2.4uC and-9 uC respectively. The net force on -6uC

asked by daryl on April 25, 2013
93. ## math

On a roulette wheel, the probability of winning when you pick a particular number is . Suppose you bet \$1.00 to play the game, and if your number is picked, you get back \$36. a. Is this a fair game? b. What would happen if you played this game a large

asked by Amy on August 15, 2010
94. ## math

On a roulette wheel, the probability of winning when you pick a particular number is . Suppose you bet \$1.00 to play the game, and if your number is picked, you get back \$36. a. Is this a fair game? b. What would happen if you played this game a large

asked by kirk on August 12, 2010
95. ## physics

Two positively-charged objects are located 0.1 m apart. How does the value of their mutual electric force change if the distance between them is doubled? (A) quadruples (B) doubles (C) same (D) halved (E) one-fourth How does the value of their mutual

asked by henry on May 30, 2018

Brit and Tara are standing 13.5 m apart on a dock when they observe a sailboat moving parallel to the dock. When the boat is equidistant between both girls, the angle of elevation to the top of its 8.0 m mast is for both observers. Describe how you would

asked by anonymous on May 7, 2011
97. ## algebra

Two trains leave stations 50 miles apart at the same time heading toward one another on parallel tracks. Train A is traveling 20 miles an hour and Train B is traveling 30 miles an hour. They pass eachother in how many hour(s).

asked by key on June 18, 2013
98. ## Physics

A block of mass 57.1 kg rests on a slope having an angle of elevation of 28.3°. If pushing downhill on the block with a force just exceeding 162 N and parallel to the slope is sufficient to cause the block to start moving, find the coefficient of static

asked by Doug on October 2, 2018
99. ## Chemistry

Check? Answers On bottom. Electrostatic interaction is important for which type of bond? A. ionic bond B. triple covalent bond C. single covalent bond D. double covalent bond When an atom gains or loses valence electrons and becomes charged, it is known as

asked by Victoria on December 13, 2012
100. ## chemistry

Check? Answers On bottom. Electrostatic interaction is important for which type of bond? A. ionic bond B. triple covalent bond C. single covalent bond D. double covalent bond When an atom gains or loses valence electrons and becomes charged, it is known as

asked by Victoria on December 13, 2012