# johnny

Most popular questions and responses by johnny-
## History

Why do you think state and local governments have a major role in providing important services? Why doesn't the federal government take on more of this role?

*asked on December 7, 2016* -
## Algebra 2 Probability

There are 10 cards. Each card has one number between 1 and 10, so that every number from 1 to 10 appears once. In which distributions does the variable X have a binomial distribution? When a card is chosen at random with replacement six times, X is the

*asked on April 17, 2018* -
## geometry

Given: ΔАВС, m∠ACB = 90° CD⊥AB,m∠ACD =60° BC = 6 cm. Find: АD

*asked on December 3, 2017* -
## Chemistry

In the following reaction, which substance is acting as the Brønsted-Lowry acid? NH3 + H2O NH4+ + OH

*asked on June 13, 2011* -
## Chemistry

Explain, in terms of particles, concentration, and reaction rate, what you expect to happen when methane gas (CH4) and hydrogen sulfide gas (H2S) are sealed in a flask and reach a state of equilibrium. CH4 (g) +2 H2S (g) CS2 (g) + 4 H2 (g

*asked on June 13, 2011* -
## physics

I am having great difficulty with this question. A block is placed on a frictionless ramp at a height of 12.5 m above the ground. Starting from rest, the block slides down the ramp. At the bottom of the ramp, the block slides onto a frictionless horizontal

*asked on October 2, 2014* -
## physics!

howdy, just cant seem to get this question, can anyone express this question in words i can get?! thanks A sound wave of wavelength 0.8 m divides into two equal parts that recombine to interfere constructively, with the original difference between their

*asked on June 3, 2010* -
## CHemistry

Arrange the following compounds in order of decreasing ease of elution from a column of silica gel: a) 2-octanol; b) 1,3-dichlorobenzene; c) tert-butylcyclohexane; d) benzoic acid I was wondering if this was the correct order of it: Tert-butylcyclohexane >

*asked on May 2, 2010* -
## physics

A 1175 kg car carrying four 82 kg people travels over a rough "washboard" dirt road with corrugations 4.0 m apart which causes the car to bounce on its spring suspension. The car bounces with maximum amplitude when its speed is 24 km/h. The car now stops,

*asked on December 11, 2008* -
## the odyssey

what is an important theme in the odyssey,Part 2?Describe the events that illustrate this theme? You need to go to www.sparknotes.com/lit, find Odyssey (in the O section, not the T's), read through the themes section, and decide. Let us know what you

*asked on March 2, 2007* -
## Math - Polynomials

off-topic: yay it's friday :D Simplify each polynomial. 1. 6g + 8k + 9g + 2k A) 3g + 10k B) -3g + 10k *** C) 17gk D) 10k - 3 2. -4x + 6x2 + 5x A) 7x^3 B) 6x^2 + 9x *** C) 6x^2 - 9x D) 6x^2 + x 3. a^2 + 5a - 3a^2 A) 5a + 2a^2 *** B) 5a - 2a^2 C) 2a^2 + 5a

*asked on May 8, 2015* -
## math

Mr. Angulo buys 5/8 pound of red grapes and 3/8 pound of green grapes. How many pounds of grapes did mr.angulo buy in all?

*asked on February 10, 2016* -
## Math

Solve for the unknown quantity in each proportion

*asked on January 12, 2018* -
## Geometry

Given: △ABC, ADEF rhombus D∈AB, E∈BC, F∈AC AB=14, BC=12, AC=10 Find: BE and EC

*asked on March 4, 2019* -
## physics

In downhill speed skiing a skier is retarded by both the air drag force on the body and the kinetic frictional force on the skis. Suppose the slope angle is è = 37.5°, the snow is dry snow with a coefficient of kinetic friction ìk = 0.0400, the mass of

*asked on December 13, 2008* -
## Calculus and Vectors

THE VECTORS a - 5b AND a-b ARE PERPENDICULAR. IF a AND b ARE UNIT VECTORS, THEN DETERMINE a dot b

*asked on May 11, 2013* -
## Organich Chemistry

What effect will the following factors have on a chromatographic separation 1) too strong an absorbent 2)collection of large elution fractions

*asked on April 26, 2010* -
## Chemistry

2. When a 1.000 g sample of the rocket fuel hydrazine, N2H4, is burned in a bomb calorimeter which contains 1200g of water, the temperature rises from 24.62C to 28.16C. If the C for the bomb is 840 J/C Calculate: q reaction for combustion of a one-gram

*asked on March 8, 2011* -
## math

In ΔABC,AD and BE are the angle bisectors of ∠A and ∠B and DE║ AB.If m∠ADE is with 34° smaller than m∠CAB,find the measures of the angles of ΔADE.

*asked on December 3, 2017* -
## chemistry

Calculate the concentrations of all species in a 1.67 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4× 10–2 and Ka2 = 6.3× 10–8. I know how to find the Na^+ and SO3^-2 but I don't know how to find

*asked on June 17, 2012* -
## Plz help with literature

The Most Dangerous Game Directions: Each question has a different point value. (134 total) As always, answer in complete sentences. Use the back of the sheet or your own paper. DO NOT CRAM ANSWERS ON THIS SIDE OF THIS SHEET! (5) 1. What do you admire or

*asked on September 3, 2015* -
## College physics

A 0.006 00-kg bullet traveling horizontally with a speed of 1.00 x 10^3 m/s enters an 20.1-kg door, imbedding itself 10.9 cm from the side opposite the hinges as in the figure below. The 1.00-m wide door is free to swing on its frictionless hinges. At what

*asked on April 11, 2012* -
## physics

A firefighter with a weight of 722 N slides down a vertical pole with an acceleration of 3.11 m/s2, directed downward. (a) What are the magnitude and direction of the vertical force (use up as the positive direction) exerted by the pole on the firefighter?

*asked on December 11, 2008* -
## Chemistry

Hey bob- Here's what I got so far: 3AgNO3 + Na3PO4 ---> Ag3PO4 + 3NaNO3 Silver nitrate and sodium phosphate are reacted in equal amounts of 200. g each. How many grams of silver phosphate are produced? 1. What is the limiting? 2. How much silver phosphate

*asked on November 11, 2017* -
## Math

A poster is 3 times a long as it is wide. A banner is 5 times as long as it is wide. Both the banner and the poster have perimeters of 24 inches. What are the length and width of the poster and the banner

*asked on October 10, 2013* -
## Chemistry

3AgNO3 + Na3PO4 ---> Ag3PO4 + 3NaNO3 Silver nitrate and sodium phosphate are reacted in equal amounts of 200. g each. How many grams of silver phosphate are produced? 1. What is the limiting? 2. How much silver phosphate is produced? 3. How much is in

*asked on November 11, 2017* -
## Physics

The acceleration of a bus is given by a_x(t)=At, where A= 1.21 is a constant. A)if the bus's velocity at time t_1= 1.14s is 5.03m/s, what is its velocity at time t_2= 2.04 ? B)if the bus's velocity at time t_1= 1.14s is 6.02m/s, what is its velocity at

*asked on May 28, 2010* -
## Physics

Four 50-\mu {\rm{C}} charges are brought from far apart onto a line where they're spaced at 2.0-{\rm cm} intervals. How much work does it take to assemble this charge distribution?

*asked on February 4, 2010* -
## Economics

At a management luncheon, two managers were overheard arguing about the following statement “A manager should never hire another worker if the new person causes diminishing returns”. Is this statement correct? If so, why? If not, explain why not.

*asked on July 6, 2009* -
## physics

An automobile can be considered to be mounted on four identical springs as far as vertical oscillations are concerned. The springs of a certain car are adjusted so that the oscillations have a frequency of 3 Hz. (a) What is the spring constant of each

*asked on December 11, 2008* -
## Programming

Submit pseudocode and a flowchart for the following programming exercise: Fat Gram Calculator Design a program that asks for the number of fat grams and calories in a food item. Validate the input as follows: - Make sure the number of fat grams and

*asked on August 19, 2010* -
## Chemistry

A .288 g sample of an unknown monoprotic organic acid is dissolved in water and titrated with a .115 M sodium hydroxide solution. After the addition of 17.54 mL of base, a pH of 4.92 is recorded. The equivalence point is reached when a total of 33.83 mL of

*asked on June 8, 2008* -
## Chemistry

Mg + 2HCl ----> MgCl2 + H2 What volume of hydrogen at STP is produced from the reaction of 50.0g of Mg and the equivalent if 75g of HCl? 1. What is the limiting reagent? 2. What is the volume of hydrogen produced? 3. How much is in excess?

*asked on November 11, 2017* -
## physics

The Sun and Earth each exert a gravitational force on the Moon. What is the ratio FSun/FEarth of these two forces? (The average Sun-Moon distance is equal to the Sun-Earth distance.)

*asked on December 6, 2008* -
## Math

Milo's pancakes recipient makes 9 serving. It's calls for 3/4 cup milk.Milo's wants to make 6 serving. How much milk will he needs.

*asked on March 30, 2016* -
## Algebra

Juan charges $3.50 per hour for babysitting. Write a rule to describe the amount of money (M) earned is a function of the number of hours (h) spent baby-sitting. HELP PLEASE

*asked on November 17, 2010* -
## Physics

Balance of vertical forces problem. Three balanced forces pull on a ring that is centered over a force table. Two forces F1 and F2 are due to weights hanging from pulleys. A frictionless pulley changes the direction of a force without altering its

*asked on April 27, 2010* -
## Physics

A crate sets on wooden horizontal surface (a wooden floor). The figure shows a top view of this looking down onto the crate (gravity would be acting into the page). Man one and man two apply forces F1 and F2, at angles of θ1 and θ2 respectively, with the

*asked on October 9, 2014* -
## AP physics 2

You are moving into an apartment and take the elevator to the 6th floor. Suppose your weight is 790 N and that of your belongings is 1080 N. (a) Determine the work done by the elevator in lifting you and your belongings up to the 6th floor (15.2 m) at a

*asked on February 18, 2011* -
## Finite math

Consider the following annuity scheme: regular payments of $200 are made every two months at the end of the month (in other words, there are six equally spaced payments over the year) into an account with a nominal rate of 6% compounded monthly. Note, this

*asked on November 10, 2016* -
## algebra 1

graph the function for the domain of 3x -y=1;D:(-3,-1,0,4)

*asked on December 16, 2015* -
## physics

An airplane is travelling at a speed of 600 mph on a heading of 345 degrees. There is a wind moving at a speed of 70 mph on a heading of 20 degrees. The pilot would like to maintain his planned course. Find the speed and heading he should set in order to

*asked on November 15, 2015* -
## algebra

simplify the number using the imaginary unit i. √-16

*asked on October 21, 2013* -
## math

5. There are x dictionaries in a bookstore. After 1/8 of them were purchased, 10 more dictionaries were shipped in bringing the total number of dictionaries to 52. What is the value of x?

*asked on July 28, 2014* -
## Statisitcs

Scores on the verbal section of the SAT have a mean of 500 and a standard deviation of 100. If someone scored at the 90th percentile, what is their SAT score?

*asked on October 31, 2010* -
## History

Which accurately describe the involvement of the Catholic Church in the Crusades? A.)In the 13th century, the Church sanctioned the Children’s Crusade in which adolescents and teenagers set out from Europe to reclaim Jerusalem. B.)In 1208, the Church

*asked on June 12, 2019* -
## Chemistry

Been stumped on this problem for a day now. 2KClO3-->2KCl+3O2 a) If 53.0g of potassium chlorate breaks down, what volume of oxygen is produced? For this one I got: 14.6L O2 b) How many grams of potassium chloride are produced from problem a? For the life

*asked on November 11, 2017* -
## trig

This a problem I need help with. A vertical ple stands by a road that is inclined 10 degrees to the horizontal. When the angle of elevation of the sun is 23 degrees, the pole casts a shadow 38 ft long directly downhill along the road. How long is the pole?

*asked on November 9, 2009* -
## MATH

The volume of a cylinder with a radius of 2 feet and a height of 4 feet is 50.2 feet^3. The volume of a cylinder with a radius of 4 feet and a height of 8 feet is 401.9 feet^3. The volume of a cylinder with a radius of 6 feet and a height of 12 feet is

*asked on December 15, 2017* -
## math

building lot in a city is shaped as a 30° -60° -90° triangle. The side opposite the 30° angle measures 41 feet. a. what is the length of the side of the lot opposite the 60° angle b. what is the length of the hypotenuse of the triangular lot. c. what

*asked on March 7, 2017* -
## math

kellys dog eats 1 2/3 bones in 10 days. How many bones will he eat in 18 days?

*asked on February 8, 2015* -
## Physics

A neutron with a mass of 1.67x10^-27 kg traveling east with a kinetic energy of 2.00x10^-21J collides perfectly elastically with helium nucleus with a mass 6.68x10^-27 kg that is initially at rest. After the collision, the neutron has a kinetic energy

*asked on November 12, 2014* -
## physics

An astronaut comes loose while outside the spacecraft and finds himself floating away from the spacecraft with only a big bag of tools. In desperation, the astronaut throws his bag of tools in the direction of his motion (away from the space station). The

*asked on October 9, 2014* -
## physics

An object is hung from a spring balance attached to the ceiling of an elevator cab. The balance reads 60 N when the elevator is standing still. (a) What is the reading when the elevator is moving upward with a constant speed of 9.6 m/s? N (b) What is the

*asked on December 11, 2008* -
## Geography/ Auto industry

What government imposed barriers stop or hinder the export of automobiles?

*asked on January 8, 2008* -
## math

The number 1 is a perfect square (1X1=1) and a perfect cube (1X1X1=1). What is the next smallest whole number which is both a perfect square and a perfect cube?

*asked on April 4, 2011* -
## physics

In an electric shaver, the blade moves back and forth over a distance of 2.0 mm. The motion is simple harmonic, with frequency 118 Hz. (a) Find the amplitude. mm (b) Find the maximum blade speed. m/s (c) Find the magnitude of the maximum blade

*asked on December 11, 2008* -
## Math Problem Solving

Jay and Mark run a lawn mowing service. Mark's mower is twice as big as Jay's, so whenever they both mow, Mark mows twice as much as Jay in a given time period. When Jay and Mark are working together, it takes them 4 hours to cut the lawn of an estate. How

*asked on January 18, 2010* -
## Physics...PLZ HELP

How much work is done to move 1.0 micro coloumb of charge from the negative terminal to the positive terminal of a 1.8V battery?

*asked on September 29, 2009* -
## math

In △ABC, CM is the median to AB and side BC is 12 cm long. There is a point P∈CM and a line AP intersecting BC at point Q. Find the lengths of segments CQ and BQ, if P is the midpoint of CM

*asked on December 29, 2018* -
## Chemistry

When 100mL of 1.00 M Ba (NO3)2 and 100 mL of 1.00 M Na2SO4, both at 25 degrees celsius, are mixed in a constant pressure calorimeter, a white precipitate is formed and the temperature rises to 28.1 degrees celsius. A. What is the precipitate? B. If all of

*asked on March 9, 2011* -
## physics

A venturi meter is a device for measuring the speed of a fluid within a pipe. The drawing shows a gas flowing at a speed v2 through a horizontal section of pipe whose cross-sectional area A2 = 0.0900 m2. The gas has a density of ñ = 1.50 kg/m3. The

*asked on December 6, 2010* -
## physics

A mass M is split into two parts, m and M - m, which are then separated by a certain distance. What ratio m/M maximizes the magnitude of the gravitational force between the parts?

*asked on December 6, 2008* -
## physics

How much work is done to move 1.0 micro coloumb of charge from the negative terminal to the positive terminal of a 1.8V battery?

*asked on September 29, 2009* -
## History

Can someone please tell me what this quote means, I am having trouble understanding. “When Andrew Johnson took upon himself the duties of his high office he swore to obey the Constitution and take care that the laws be faithfully executed. That, indeed,

*asked on November 17, 2017* -
## physics

12.8 kg of ice at 0 C is dropped into 3.3 kg of water at C. What fraction of the ice melts? =

*asked on May 4, 2014* -
## math

Find the area of the following circle. r = 9 yd.

*asked on January 25, 2013* -
## Chemistry

During a fractional distillation of a 25mL ethanol/H2O soln, it was found that first the temperature stayed constant at ~75 C for 3mL of soln, then it went up to 100 C for the rest of the soln. The first question is: Assuming that the unknown (ethanol) did

*asked on February 1, 2012* -
## math

Suppose you are starting an office-cleaning service. You have spent $315. To clean an office, you use $4 worth of supplies. You charge $25 per office. How many offices must you clean to break even? I don't understand this. I just made an equation, 4x + 25y

*asked on March 17, 2008* -
## Chemistry

Ethanol (C2H5OH) has been produced since antiquity by the fermentation of fruits and vegetables. Given the following data, if 5.87 kJ of energy are transferred to 13.3 g of frozen ethanol at -130.0 °C, what is the final temperature of the sample? Heat

*asked on April 25, 2013* -
## physics

In 1956, Frank Lloyd Wright proposed the construction of a mile-high building in Chicago. Suppose the building had been constructed. Ignoring Earth's rotation, find the change in your weight if you were to ride an elevator from the street level, where you

*asked on December 6, 2008* -
## chemistry

Which nucleophile, when reacted with 1-bromopropane (CH3CH2CH2Br), would produce an ether? I- OH- -OCH3 SH-

*asked on March 26, 2014* -
## physics

A meter stick balances horizontally on a knife-edge at the 50.0 cm mark. With two 5.00 g coins stacked over the 12.0 cm mark, the stick is found to balance at the 43.0 cm mark. What is the mass of the meter stick?

*asked on December 13, 2008* -
## Math

An only son inherited a 3/4 hectare lot. He decided to build a 40-door condominium on the lot. The floor are of the units is uniform and the total floor area of the entire condominium is 1/5 less than the area of the lot to provide for certain amenities.

*asked on July 3, 2016* -
## math

Martha rides 29 miles everyday on her bike about how many miles did she ride in 6 weeks

*asked on April 22, 2016* -
## math

One phone plan charges a $20 monthly fee and $0.08 per minute on every phone call made. Another phone plan charges a $12 monthly fee and $0.12 per minute on each call. After how many minutes is the charge the same for both plans? A.60 minutes B.90 minutes

*asked on July 14, 2014* -
## chemistry

is the reaction between Copper sulfate and zn exothermic or endothermic and does that involve the activity series?

*asked on April 28, 2015* -
## Physics

A driver of a car going 95.0 km/h suddenly sees the lights of a barrier 39.0 m ahead. It takes the driver 0.95 s before he applies the brakes, and the average acceleration during braking is -10.0 m/s2. What is the maximum speed at which the car could be

*asked on February 15, 2011* -
## physics

At what altitude above Earth's surface would the gravitational acceleration be 3.0 m/s2?

*asked on December 6, 2008* -
## Algebra 1

Your math teacher tells you that next week's test is worth 100 points and contains 38 problems. Each problem is worth either 5 points or 2 points. Because you are studying systems of linear equations, your teacher says that for extra credit you can figure

*asked on March 9, 2008* -
## Physics

A neutron with a mass of 1.67x10^-27 kg traveling east with a kinetic energy of 2.00x10^-21J collides perfectly elastically with helium nucleus with a mass 6.68x10^-27 kg that is initially at rest. After the collision, the neutron has a kinetic energy

*asked on November 12, 2014* -
## Statistics

Opinion polls find that 13% of Americans "never have time to relax." If you take an SRS of 543 adults, the approximate distribution of the number in your sample who say they never have time to relax will be binomial with parameters: n= p=

*asked on November 1, 2012* -
## math

The number 1 is a perfect square and a perfict cube. What is the next smallest whole number which is a perfect square and a perfect cube?

*asked on March 28, 2011* -
## physics

10. The drawing shows a baggage carousel at an airport. Your suitcase has not slid all the way down the slope and is going around at a constant speed on a circle (r = 12.4 m) as the carousel turns. The coefficient of static friction between the suitcase

*asked on September 30, 2015* -
## Science

How much heat is produced when the body metabolizes a gram of trioleylglycerol?

*asked on May 13, 2015* -
## chemistry

Which of the following statements concerning differences between ionic and molecular compounds is correct? Molecular compounds contains two elements, and ionic compounds contain three of more elements ionic compounds contain oxygen, and molecular compounds

*asked on February 23, 2014* -
## physics

A 38 kg girl and an 8.4 kg sled are on the frictionless ice of a frozen lake, 16 m apart bu connected by a rope of negligible mass. The girl exerts a horozontal 4.7 force on the rope. (a) What is the acceleration of the girl? m/s2 (b) What is the

*asked on December 11, 2008* -
## Chemistry

I don't understand this paragraph, can anyone explain it to me? If a large amount of energy is needed to remove an electron from an atom, the arrangement of electrons in that atom is considered to be especially stable. Thus, a high first ionization energy

*asked on March 5, 2008* -
## Math!

From the top of a 40m fire tower, a fire ranger observes smoke in tower locations. One has a an angle of depression of 10o, and the other has an angle of depression of 7o. Calculate the distance between the smoke sightings when they are a.) on opposite

*asked on January 8, 2008* -
## math

what is 1+5*99-10+a=100000 a=__

*asked on January 8, 2019* -
## physics

A neutron with a mass of 1.67x10^-27 kg traveling east with a kinetic energy of 2.00x10^-21J collides perfectly elastically with helium nucleus with a mass 6.68x10^-27 kg that is initially at rest. After the collision, the neutron has a kinetic energy

*asked on November 9, 2014* -
## math

A ship model is 0.5% actual size. If the model is 1 meter long, what is the actual length of the ship?

*asked on July 8, 2014* -
## math

Janelle has $20 and is saving $6 per week. April has $150 and is spending $4 per week. When will they both have have the same amount of money? please show work,

*asked on July 24, 2014* -
## Physics

The human heart is a mechanical pump. The aorta is a large artery that carries oxygenated blood away from the heart to various organs in the body. For an individual at rest, the blood in the aorta (of radius 1.25 cm) flows at a rate of 5*103 cm3/min (5

*asked on January 17, 2013* -
## Physics

What is the force on two point charges of 10-6 C that are 20 cm apart?

*asked on November 29, 2012* -
## chemistry

In the explosion of a hydrogen-filled balloon, 0.30g of hydrogen reacted with 2.4g of oxygen to form how many grams of water vapor? (Water vapor is the only product.)

*asked on September 6, 2011* -
## Economics

Engineers at a national research laboratory built a prototype automobile that could be driven 180 miles on a single gallon of unleaded gasoline. They estimated that in mass production the car would cost $40,000 per unit to build. The engineers argued that

*asked on July 6, 2009* -
## physics

The figure below shows a "conical pendulum", in which the bob (the small object at the lower end of the cord) moves in a horizontal circle at constant speed. (The cord sweeps out a cone as the bob rotates.) The bob has a mass of 0.035 kg, the string has

*asked on December 11, 2008* -
## physics

At what altitude above Earth's surface would the gravitational acceleration be 3.0 m/s2?

*asked on December 11, 2008* -
## phyics

A ball is thrown straight upward. At 5.00 m above its launch point, the ball’s speed is one-half its launch speed. What maximum height above its launch point does the ball attain?

*asked on October 20, 2013*