# Charlie

Popular questions and responses by Charlie-
## Chemistry

The titration of 25.0 mL of an unknown concentration H2SO4 solution requires 83.6 mL of 0.12 M LiOH solution. What is the concentration of the H2SO4 solution (in M)? A) 0.40 M B) 0.10 M C) 0.20 M D) 0.25 M E) 0.36 M The answer is supposedly C, but I got A.

*asked on December 8, 2009* -
## Math

A rectangular prism is being designed to have a volume of 36 cubic units. Find the minimum surface area in square units for the prism if the edge lengths are positive integers.

*asked on June 22, 2017* -
## History

Which best analyzes Nixon’s involvement in Vietnam with the decision to pass the War Powers Resolution? a. The My Lai Massacre convinced representatives to force the president to disclose military information. b. The end of the Vietnam War led to a

*asked on August 21, 2018* -
## History

Which reveals problems in South Vietnam during the early 1960s? a. The election of Ho Chi Minh to the presidency caused turmoil and disagreement. b. The corrupt President Ngo Dinh Diem was overthrown and assassinated. c. The Gulf of Tonkin attack led the

*asked on August 20, 2018* -
## history

Which identifies why the Nixon administration decided to bomb Cambodia? a. North Vietnamese troops were using trails into Cambodia to get supplies. b. Cambodia secretly decided to ally with North Vietnam and planned to attack US forces. c. Ho Chi Minh was

*asked on August 21, 2018* -
## History

Which best defines petro-economics? a. a nation’s industrial output that stays consistent despite market turmoil b. the influence of oil wealth in shaping economic and political climates c. the gross national product of countries that produce marble and

*asked on August 21, 2018* -
## history

Which were examples of the counterculture in America in the 1960s? (Select all that apply.) a. Patriotic Americans marched in support of the Vietnam War. b. Feminist groups fought for better positions in the workplace for women. c. The Ohio National Guard

*asked on August 20, 2018* -
## mathematics

Linda ran 18 laps around the track. Dori ran only one half as many laps as Linda ran. How many laps did Dori run?

*asked on June 26, 2020* -
## history

What was the Tet Offensive? a. A combined North Vietnamese and Chinese attack on the American navy in the Gulf of Tonkin b. An all-out invasion of North Vietnam by South Vietnamese and American troops c. An American bombing campaign against Communist

*asked on August 20, 2018* -
## Chemistry

Consider the following reaction: 2NiO (s)--> 2Ni(s) + 2O2 (g) If O2 is collected over water at 40.0 C and a total pressure of 752 mmHg, what volume of gas will be collected for the complete reaction of 25.67 g of NiO? I am struggling to set up this

*asked on December 7, 2009* -
## history

Who was Douglas MacArthur? A. an ambitious commander of Allied forces in Korea who was dismissed by President Truman for his vocal criticisms of Truman’s handling of the war B. a noted statesman and philanthropist who oversaw the rebuilding of postwar

*asked on August 21, 2018* -
## Trig

A 12 foot ladder leans against a building. The top of the ladder leans against the wall 10.5 feet from the ground. What is the angle formed by the ground and the ladder? Assume its a right triangle.

*asked on April 17, 2013* -
## fourth grade math

round this number to the nearest thousand 409,614

*asked on September 14, 2011* -
## Physics

1) Planet Zero has a mass of 5.0*10^23 kg and a radius of 2.0*10^6 meters. What is the acceleration of gravity on planet zero? 2)Phobos, a satellite of Mars, has a radius of 11km and a mass of 10^16 kg. Its a bit lumpy, but let's assume its spherical to

*asked on December 6, 2014* -
## Calculus

A trough is 15 ft long and 4 ft across the top, as shown in the figure. Its ends are isosceles triangles with height 3 ft. Water runs into the trough at the rate of 2.5 ft^3/min. How fast is the water level rising when it is 2 ft deep?

*asked on February 6, 2014* -
## chemistry

in the reaction 2Na + Cl2 --> 2NaCl how many grams of NaCl are produced when 25 g. of sodium reacts completely to form NaCl?

*asked on May 17, 2011* -
## math

a clock strikes only in the hour (once at 1.00,twice at 2.00 etc) how many times will it strike in one 24 hour day? please explain,thanks

*asked on August 6, 2013* -
## gen.science

A compound containing 3 atoms of carbon and 8 atoms of hydrogen is combined in a reaction with oxygen molecules. The two end products of this equation are carbon dioxide and water. Which chemical or element will have the largest number of moecules?

*asked on June 21, 2010* -
## Physics capacitance

I know that to solve: f=1 over 2 pi sqrt LC for C, I have to use C= 1 over L(2 pi f)^2 Can someone take me through the rearranging please. Thanks.

*asked on May 7, 2009* -
## algebra

Solve this equation for x. 0.5(5-7x) = 8-(4x+6)

*asked on November 18, 2015* -
## Dimensionless parameters

The drag, D, on a sphere located in a pipe flow through which a fluid is flowing to be determined experimentally. Assume that drag is a function of the sphere diameter, d, the pipe dianeter, H, the fluid velocity, V, and the fluid density, p. a) What

*asked on March 27, 2014* -
## Physics

A 10 kg monkey wishes to climb a 7.15-meter high vine. The vine will break if the tension exceeds 110 N. The monkey starts from rest and exerts a constant force on the rope as he pulls himself upward. What is the shortest amount of time in which the monkey

*asked on April 23, 2012* -
## Math

What percentage of the data falls outside 1 standard deviation of the mean?

*asked on June 7, 2011* -
## math

Tell which real number corresponds to the situation: During a month, a person withdraws $350. what is the corresponding # for this sentence?

*asked on November 14, 2010* -
## Biology

What differences would you expect to see in a population made up of individuals whose chromosomes experience crossing-over frequently compared with a population made up of individuals whose chromosomes do not cross over?

*asked on January 6, 2010* -
## Physics

If a space station must "provide one sixth the magnitude of the acceleration due to gravity on Earth" Can I use 9.81ms^-2/6 or is that too simple? Thanks.

*asked on October 9, 2008* -
## physics

While her kid brother is on a wooden horse at the edge of a merry-go-round, Sheila rides her bicycle parallel to its edge. The wooden horses have a tangential speed of 6 m/s. Sheila rides at 4 m/s. The radius of the merry-go-round is 8 m. At what time

*asked on September 29, 2008* -
## Physics

A 10,000N car comes to a bridge during a storm and finds the bridge washed out. The 650-N driver must get to the other side, so he decides to try leaping it with his car. The side the car is on is 16.6 m above the river, while the opposite side is a mere

*asked on February 8, 2008* -
## chemistry

Calculate the rms speed of NF3 molecules at 27 ∘C.

*asked on November 10, 2019* -
## Government

Why is the power shown in marbury v madison an important part of the us system of government? A. It established the right of the legislature to make laws B. It established the right of the executive to veto laws C. It established the right of the judiciary

*asked on February 15, 2019* -
## history

Which most accurately describes the Vietnam War? a. Communism spreading in Southeast Asia led to a power struggle between the superpowers that escalated into an ongoing bloody conflict. b. The French occupiers of Vietnam allied with Communist Chinese

*asked on August 20, 2018* -
## Physics

1) Determine the force of gravitational attraction between the earth(m=5.98*10^24kg) and a 70-kg physics student if the student is in an airplane at 4.950 meters above the earth's surface.

*asked on December 6, 2014* -
## math

Water is leaking out of an inverted conical tank at a rate of 6700 cubic centimeters per minute at the same time that water is being pumped into the tank at a constant rate. The tank has height 6 meters and the diameter at the top is 3.5 meters. If the

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

One month Ivanna rented 5 movies and 3 video games for a total of $29. The next month she rented 2 movies and 12 video games for a total of $71. Find the rental cost for each movie and each video game. Rental cost for each movie? Rental cost for each

*asked on March 30, 2014* -
## Algebra

In a recent year, 16.3% of all registered doctors were female. If there were 47,600 female registered doctors that year, what was the total number of registered doctors? Round your answer to the nearest whole number.

*asked on March 30, 2014* -
## Physics

A hockey puck is hit on a frozen lake and starts moving with a speed of 12.2 m/s. Ex- actly 6.70 s later, its speed is 6.20 m/s. The acceleration of gravity is 9.81 m/s2 . a) What is its average acceleration? Answer in units of m/s2

*asked on February 3, 2014* -
## Math

A production crew is assembling a three-level platform inside a stadium for a performance. The platform has the dimensions of 4x long and 2x wide, the middle box has the dimensions of 6x long and 4x wide, and the bottom box has the dimensions of 8x long

*asked on October 9, 2013* -
## Chemistry

Calculate Kp at 298K for the reaction SO2 + NO2--->SO3 + NO

*asked on May 1, 2013* -
## Chemistry

Uranium-235 can be separated from U-238 by fluorinating the uranium to form UF6 (which is a gas) and then taking advantage of the different rates of effusion and diffusion for compounds containing the two isotopes. Calculate the ratio of effusion rates for

*asked on December 7, 2009* -
## physics fields and charges

I'm stumped: 2 charges, Q1 and Q2, equal magnitude, but different signs (not assigned) lie on a line, x axis, a known distance apart. Segment pq lies centrally on the line, distance apart is known. An electron is released at p from rest, and passes q at a

*asked on February 3, 2009* -
## pre-calculus

A flagpole at right angle to the horizontal is located on a slope that makes an angle of 12∘ with the horizontal. The pole's shadow is 16 meters long and points directly down the slope. The angle of elevation from the tip of the shadow to the sun is

*asked on April 30, 2020* -
## History

Please check my answers! 1. Why did some people oppose internment camps during World War II? A. The camps were overcrowded. B. The camps tortured people as prisoners of war. C. There were too many children held in the camps. D. The camps held people who

*asked on February 13, 2019* -
## English

Why is Granny humming again at the end of "Blues Ain't No Mockin Bird"? A) She is angry at the cameramen. B) She is glad Grandaddy got rid of the cameramen. *** C) She always hums when she makes rum cakes.

*asked on December 4, 2017* -
## Language Arts

Hello, I need help on this. Please help me. I am not coming here for answers like most people, but if you want to give me the answer then I will gladly except it and edit it into my owns words. For you that are on Connexus, you may need help too. So yeah.

*asked on May 15, 2017* -
## Algebra

There are 3 red chips and 2 green chips. You win the game if you take out all the chips of the same color. What is the probability you take all the green chips out?

*asked on November 16, 2016* -
## Algebra

In a set of 6 numbers, {-2, -1, 0, 1, 2, 3}, what is the probability the product of any two numbers is zero?

*asked on November 16, 2016* -
## Statistics

a ball rolls off a table and falls 0.80 m to the floor, landing with a speed of 4.5 m/s. 1. What was the initial speed of the ball? 2. What initial speed must the ball have if it is to land with a speed of 5.8 m/s? 3. What is the magnitude of the

*asked on October 9, 2016* -
## logarithm functions

use the properties of logarithms to expand the expression as sum, difference or multiple of logarithms. Simplify. a.log(x^3/2) b.log base4 16a

*asked on September 11, 2016* -
## maths

there are 12 sweets in a bag. 7 of the sweets are strawberry flavou. 5 of the sweets are lime flavour. harriet takes 2 sweets at random work out the probability that she takes at least one strawberry sweet.

*asked on January 14, 2016* -
## Physics

A father pulls his son, whose mass is 26.7 kg and who is sitting on a swing with ropes of length 3.27 m, backward until the ropes make an angle of 35.6° with respect to the vertical. He then releases his son from rest. What is the speed of the son at the

*asked on October 21, 2014* -
## Physics

A father pulls his son, whose mass is 26.7 kg and who is sitting on a swing with ropes of length 3.27 m, backward until the ropes make an angle of 35.6° with respect to the vertical. He then releases his son from rest. What is the speed of the son at the

*asked on October 21, 2014* -
## math

There are 60 coins in a box containing only nickels, dimes, and quarters. If there is one more than twice as many dimes as quarters, and the total value of all dimes is five cents less than the total value of all nickels, how many of each denomination are

*asked on July 7, 2014* -
## Geometry

Mike and Lani stand 21.2 meters apart. From Mike’s position, the angle of elevation to the top of the Eiffel Tower is 40°. From Lani’s position, the angle of elevation to the top of the Eiffel Tower is 38.5°. How many meters high is the Eiffel Tower?

*asked on February 23, 2013* -
## math

A bus stopped at Gulgong, 25% of the passengers got off the bus and 3 new passengers got on. At the next stop,3 quarter of the passengers got off the bus and 11 new passengers got on. The bus then had 17 passengers.How many passengers did the bus have just

*asked on November 17, 2012* -
## physics

The two angled ropes used to support the crate in Figure P5.7 can withstand a maximum tension of 1500 N before they break. What is the largest mass the ropes can support?

*asked on October 8, 2012* -
## Physics

Part of a single rectangular loop of wire with dimensions .35 m by .75 m (.35 is the height and .75 is the length) is situated inside a region of uniform magnetic field of 0.395 T. The total resistance of the loop is 0.690 Ω. Calculate the force required

*asked on March 31, 2012* -
## trigonometry

The side of a lake has a uniform angle of elevation of 15 degrees 30 feet. How far up the side of the lake does the water rise if the height of the lake increases by 7.3 feet during flood season.

*asked on October 13, 2011* -
## chemistry

iF 50.0 g of iron (II) carbonate react completely with hydrochloric acid, how many grams of carbon dioxide gas may be produced?

*asked on July 3, 2011* -
## statistics

Three students take equivalent stress tests. Which is the highest relative score? a. A score of 144 on a test with a mean of 128 and a standard deviation of 34. b. A score of 90 on a test with a mean of 86 and a standard deviation of 18. c. A score of 18

*asked on April 3, 2011* -
## Chemistry

You mix 1.00 L of 2.00 M BaCl2 with 1.00 L of 2.00 M AgNO3. What compounds remain in solution, and what are their concentrations?

*asked on March 29, 2011* -
## math

How do i find the extrema (local maximum and minimum) by using the first derivative of: x^3-(3/2)x^2?

*asked on February 16, 2011* -
## 9th grade science

A landslide may be caused when friction is ______ by moisture

*asked on January 4, 2011* -
## College Physics

A mass of 0.4 kg, hanging from a spring with a spring constant of 80 N/m, is set into an up-and-down simple harmonic motion. What is the velocity of the mass when at its maximum displacement of 0.1 m?

*asked on October 24, 2010* -
## physics

1.calculate th speed of waves in water that are 0.4m apart and have a frequency of 2hz? 2. sound waves travel at approximately 340m/s what is the wavelength of a sound with a frequency of 20Hz? what is the wavelength of a sound with a frequency of 20 kHz?

*asked on March 31, 2011* -
## Physical Science

What is cracking and reforming? For what purposes are either or both used by the petroleum industry

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

I have to plot a graph of Pressure gradient vs average velocity (water in a pipe, I have all the data). I plan to put the average velocity on the x axis, since I could control that better in an experiment. Do you agree/ Thanks. Charlie

*asked on August 10, 2009* -
## Physics

The last stage in the fusion of hydrogen to form helium in the Sun involves the formation of an ƒ¿-particle (4He) from two 3He nuclei: 3He + 3He ¨ 4He + p + p The binding energy for 3He is 2.57 MeV per nucleon and that for 4He is 7.07 MeV per nucleon.

*asked on June 18, 2009* -
## Physics

In an elastic collision: mass a is 1kg, and is moving at 100ms^1 in the +ve x direction when it hits mass b, 10kgs at rest. Given: mass a moves off at 80 ms^1 in the -ve x direction. What's the final velocity of mass b. Using cons of momentum, i say 2 ms^1

*asked on June 16, 2009* -
## physics, fluids

would I be correct if I explained the 3 expressions in Bernoulli's equation as representing: P is the pressure 1/2*rho*v squared is the kinetic energy rho*g*h is the gravitational kinetic energy. Or is it more complicate than that. Thanks

*asked on January 24, 2009* -
## Physics

A movie stunt man (mass 82.3 kg) stands on a window ledge 5.69 m above the floor. Grabbing a rope attached to a chandelier, he swings down to grapple with the movie’s villain (mass 72.3 kg), who is standing directly under the chandelier. (Assume that the

*asked on March 13, 2008* -
## science ( physics)

hello, i am having trouble with this problem. Calculate the average force of friction acting on a wood block as it is propelled along the floor by an elastic band ? my solution and my ideas: What does it mean by average froce of friction? I first weighed

*asked on May 30, 2007* -
## Geography

different types of government in Sub-Region (the eastern mediterranean) world geography

*asked on December 12, 2019* -
## math

Is it possible for a negative angle to have a compliment or supplement? for example, the angle -54°

*asked on November 17, 2019* -
## World History

I need help developing a thesis statement for an essay. I could use some live, interactive help.

*asked on October 22, 2019* -
## Algebra

Let f(x) = 9 – x, g(x) = x^2 + 4, and h(x) = x – 2. g(f(2))

*asked on February 26, 2019* -
## Algebra

I have these algebra problems that I have been stuck on for over a week, and I'm beginning to fall behind. Any help will be much appreciated. I am told to compute the following: Let g(x) = 3x, and h(x) = x^2 + 1. The first one was g(-1), and I got

*asked on February 26, 2019* -
## Algebra

Compute the following: Let g(x)=3x, and h(x)=x^2+1. h(3) Please show work & help me understand.

*asked on February 14, 2019* -
## Algebra

Compute the following: Let g(x)=3x, and h(x)=x^2+1. g(-1) Need help with understanding, please show what you did.

*asked on February 14, 2019* -
## Math, algerbra,precalculus, logaritums

Is a logarithm always equal to a power? yes or no?

*asked on February 9, 2019* -
## Precalculus, algerbra 2, investment,

You have 4 different investment options 4% interest 7% compound continuously 19% annually 5% every month You have 1000 dollars how long does it take for the value to double in each other investment options? How long does it take until 1000 becomes 1800?

*asked on February 6, 2019* -
## Math, algerbra 2, algerbra, precalculus, homework

You have 4 different investment options 4% interest 7% compound continuously 19% annually 5% every month You have 1000 dollars how long does it take for the value to double in each other investment options? How long does it take until 1000 becomes 1800?

*asked on February 6, 2019* -
## Precalculus, algerbra 2, investment,

A stuffed animal dealer tells you that a fish he bought for $8 four years ago is now worth $200 follow the steps below to find the effective yield for this investment. Begin with the equation 8(1+r) ^4=200.Solve for (1+r) ^4 Take the common logarithm of

*asked on February 6, 2019* -
## precalculus, math, intrest, algerbra 2

At the show a basketball card dealer tells you that a vintage card increases in value by a factor of 10 every 9 years.If the card is now worth $32, how long ago did she buy it?(Hint: Remember that the value is multiplied by 10 every 9 years, not every

*asked on February 6, 2019* -
## math.

Abel ,Belle and Cindy have $408 altogether. Belle has $7 more than Cindy And $5 more than Abel. how much does Abel have?

*asked on November 7, 2018* -
## Math

Find an equation of the line. Write the equation in the standard form. Through (7,6); parallel to 4x-y=9

*asked on August 22, 2018* -
## history

Which analyzes why some historians believe that the federal civil defense administration used propaganda to reduce the general public concerned about nuclear warfare? a. Historians believe that the FCDA generated reports that underestimated the missile gap

*asked on August 21, 2018* -
## history

What was Japanese Reconstruction? a. It was the decision to end the Japanese monarchy and establish a US-controlled puppet dictator. b. It was the occupation of Japan by the United States to expand military dominance in the Pacific. c. It was an attempt by

*asked on August 21, 2018* -
## science

which physical properties are characteristic of metal

*asked on January 24, 2018* -
## Math

A) Write a numerator for each fraction to make the fraction close to, but not equal to, 1/2. Then, write another numerator to make each fraction close to, but greater than 1. 1) _/22 2) _/43 3) _/17 My Answers: 1) 10, I believe. 2) 20? I dont know, please

*asked on November 13, 2017* -
## math

How many degrees are in the smaller angle formed by the minute and hour hands on a clock at 12:30?

*asked on August 10, 2017* -
## Early Childhood

When reading aloud to a group of toddlers at the beginning of the year, why would the teacher choose to read a book that students may have already heard at home? A. The teacher wants the students to feel comfortable and it will help create a rapport. B.

*asked on May 16, 2017* -
## Number problems

It is a number less than 50 it's a 2 didit number 3 is a factor of the number the sum of its digits is one third of the number

*asked on May 2, 2017* -
## math

6=e^5r I have no idea how to do this please help Thanks

*asked on April 18, 2017* -
## math

If you invest $1000 at 3% interest compounded semiannually. when will the investment be worth $1500 ? 1000(1 +.03/2)^q= 1500 not sure if this is right ? thanks

*asked on April 18, 2017* -
## physics

A hippo has a mass of 6000kg. When standing on 4 feet, how much pressure is exerted on the ground? Assume each foot has an area of 0.10 square meter. Show your work.

*asked on February 6, 2017* -
## maths

Calculate the area of the following triangles, giving your answers to 2 decimal places: (a) The right-angled triangle with sides a=16, b=63, and c=65. (b) The triangle with angle α = 40° and adjacent sides b=10 and c=20.

*asked on November 18, 2016* -
## math

A 5.35 kg steel block is spun around a motor at 36.5 rpm. The angular acceleration of the block is -2.14 rads/s^2 and it takes 1.79 s for the block to come to a complete stop. What is the angular displacement while the block slows to a stop?

*asked on October 23, 2016* -
## math

a board is 19ft 9inches long is cut into nine equal pieces to the nearest inch. how long is each piece? how many inches of board will be left over?

*asked on July 21, 2016* -
## math

a+b=76 a-b=38 a/g=?

*asked on May 21, 2016* -
## Chemistry

How would one work through this problem? -Calculate the number of liters of 1.25M solution that can be made from 6.400g of barium nitrate. - I know that it's just stoichiometry, but I'm confused. The formula for molarity is the number of moles of the

*asked on May 7, 2016*