Saturday

October 10, 2015
Total # Posts: 242

**Physics**

A car travels due east with a speed of 40.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth. The traces of the rain on the side windows of the car make an angle of 54.0° with the vertical. Find the velocity of the rain with respect to ...
*September 29, 2015*

**physics**

A plane accelerates from rest at a constant rate of 5.00 m/s2 along a runway that is 1800 m long. Assume that the plane reaches the required takeoff velocity at the end of the runway. What is the time tTO needed to take off?
*September 18, 2015*

**physics**

a) What is the magnitude of the electric field at a point midway between a −8.5μC and a +8.5μC charge 8.0cm apart? Assume no other charges are nearby. b) What is the direction of the electric field?
*July 8, 2015*

**History**

5 is right
*April 29, 2015*

**math**

At 8 A.M., Dylan and his neighbor, Mickey, drove in their cars to a city that was 240 mi. away from their neighborhood. When Dylan reached the city, Mickey had 40 mi. to go. He finally completed the trip 48 minutes later. a) How long did it take Mickey to drive to the city? b...
*February 27, 2015*

**chemistry**

Thank you!
*February 15, 2015*

**chemistry**

Calculate the pH of a saturated solution of Sr(OH)2. The Ksp for Sr(OH)2 is 3.2x10^-4.
*February 15, 2015*

**English (Reunion by John Cheever)**

What is the significance of the title? Although the the story depicts Charlie's reunion with his father the word reunion id used without a definite or an indefinite article. Why?
*December 1, 2014*

**English (Reunion by John Cheever)**

In John Cheever's story reunion, what do the restaurants symbolize. Why does Charlie call hi father daddy at the end of the story? Examine the first and last sentences of the story. What is common and why? How do you interpret the ending of the story? Does Charlie accept ...
*November 30, 2014*

**English (Urgent)**

In John Cheever's story reunion, what do the restaurants symbolize. Why does Charlie call hi father daddy at the end of the story? Examine the first and last sentences of the story. What is common and why? How do you interpret the ending of the story? Does Charlie accept ...
*November 30, 2014*

**Environmental Science**

India’s prime minister puts you in charge of that nation’s population policy. India has a population growth rate of 1.6% per year, a TFR of 2.7, a 49% rate of contraceptive use, and a population that is 71% rural. What policy steps would you recommend, and why? What ...
*September 28, 2014*

**English**

What are some similarities and differences between the poems "i sing of Olaf glad and big" and "Night, Death, Mississippi"?
*September 26, 2014*

**Environmental Science**

What are some common justifications for environmental policy?
*September 20, 2014*

**Math**

Matt who stands at 68 inches tall casts an 8 foot shadow at the same time a pear tree casts a 21 foot shadow. How tall is the tree?
*September 3, 2014*

**Alegbra1**

What is the domain of the following function? f(x) = √ -x + 2 - 1
*July 30, 2014*

**THE GREAT GATSBY HELP**

I'll do that, thank you
*June 12, 2014*

**THE GREAT GATSBY HELP**

What do you mean by ideals?
*June 12, 2014*

**THE GREAT GATSBY HELP**

In the book, how does Gatsby's flaws and idealism represent the best and the worst about the American Dream?
*June 12, 2014*

**PRECALC QUESTION**

Solve for "x" and "y" given the following matrix equation: (2x, 0.5y, -2, 1) * (3, -2, 0, 1) = (-24, 19, -6, 5) (the matrices are going from left to right, they're all 2x2's.)
*May 25, 2014*

**PRECALC HELPPP please**

A local photo gallery sells 3 different types of picture packages: economic, standard and luxury. The table below shows the number of pictures and packages given in each of the 3 packages; Package: Wallet: 4x6: 8x10: Economic 10 4 1 Standard 20 4 2 Luxury 30 8 4 The table ...
*May 24, 2014*

**PRE CALC HELP PLEASE**

When I solved the system of equations I got M=25, E=30 and N=15 and when I substituted into each equation it worked, thank you so much!
*May 24, 2014*

**PRE CALC HELP PLEASE**

A plumber, electrician and painter were all hired to work on 3 different house. For Adam's house, a plumber worked a total of 35 hours, an electrician worked 42 hours and a painter needed 29 hrs to complete the job. the total cost of the three workers for adam's house ...
*May 24, 2014*

**Canadian History **

1) The essential question for the last few lessons asks "How did Canada seek to establish economic security and social justice from the period of the depression to the patriation of the Constitution? What kind of economic security did the Canadians seek? What kind of ...
*May 9, 2014*

**Algebra1**

Find the sum of the first 33 terms of the arithmetic sequence whose first term is 3 and whose 33rd term is -253.
*April 22, 2014*

**PRE CALC**

Evaluate: sigma notation of (3cos k(pi) +1) start value: k=0 end value: k=3
*April 3, 2014*

**PRE CALC**

The 20th term of an arithmetic sequence is 27 and the first term is -11. What is the common difference??
*April 2, 2014*

**PreCalc PLEASE HELP**

Find the common ratio, r, for the geometric sequence that has a1= 100 and a8= 25/32
*March 23, 2014*

**PreCalc PLEASE HELP**

Ms Farnum was hired for a new job at a salary of $62,500 and was promised a 5% raise each year. What would Ms.Farnum's salary be, to the nearest dollar, after working there for 6 years?
*March 23, 2014*

**science(check answers)**

are these the final graded answers?
*March 21, 2014*

**PHYSICS IMPULSE MOMENTUM QUESTION**

what is a scenario in which REDUCING the time of impact would be beneficial?
*March 10, 2014*

**Pre-Calc Help please**

Solve for x: log base5 (4x) + log base5 (x) = log base5 (64)
*March 4, 2014*

**Pre Calc**

Solve the following inequality in terms of natural logarithms (ln). (e^6x)+2 is less than or equal to 3.
*March 3, 2014*

**Precalc**

Thank you!
*March 3, 2014*

**Precalc**

Solve the following equation for x in terms of ln and e. (2e^3)-6-(16e^-x)=0
*March 3, 2014*

**Pre-Calc**

Solve for x: log base27 (2x-1) = 4/3
*March 2, 2014*

**Pre-Calculus**

Solve the following inequality in terms of natural logarithms (ln). (e^6x)+2 is less than or equal to 3.
*March 2, 2014*

**Pre-Calculus**

Find N if log base 6 (6^7.8)=N
*March 2, 2014*

**History **

When was the first contact of the following first nations people of canada: First nations of the Mackenzie and Yukon River Basins Pacific coast first nations Plateau Fist Nations Plains first nations
*February 20, 2014*

**English **

Lord of the flies questions 1-7 Although it appears that Ralph and jack would become good friends strain is being placed on their friendship. The boys seem to be from two different world, "There was the brilliant world of hunting, tactics, fierce exhilaration, skill: and ...
*February 19, 2014*

**social studies**

during the early 1800s the United States tried to make peace with other countries in order to grow and develop. give an example of one of those peace efforts and briefly explain what it tried to accomplish
*February 10, 2014*

**science**

joey drives his car 7 kilometers north. he stops for lunch and then drives 5 kilometers south. what distance did he cover?
*January 27, 2014*

**physics **

a baseball is popped straight up. the ball leaves the bat moving at 37.8 m/s. at what time is the ball 20 m above the ground?
*December 1, 2013*

**physics. again. **

a baseball is popped straight up. the ball leaves the bat moving at 37.8 m/s. at what time after being struck is the ball moving at 10 m/s upwards? where is the baseball at this time? answer= 67.9m I need to know how to get this answer
*December 1, 2013*

**Physics **

a baseball is popped straight up. the ball leaves the bat moving at 37.8 m/s. to what height did the ball rise. t=7.72 s the answer is 73 m, but how do you get that answer
*December 1, 2013*

**physics URGENT **

3. Using conceptual meaning of g = Fg/m [N/kg], answer the following: a) What does the spring scale read on the surface of the Moon?
*November 28, 2013*

**Math**

The students sold children's ticket for $30 per ticket and adult tickets for $40 for a total of $930. Write an equation for the scenario and determine the x and y intercept.
*November 4, 2013*

**Physics **

1) what does the y intercept on a force vs acceleration graph represent? 2)what is the relationship of mass and acceleration?
*October 30, 2013*

**ECONOMICS/ACCOUNTING/BUSINESS**

PLS HELP, BEEN STUCK FOREVER ON TWO QUESTIONS, THIS IS ONE : There are usually no costs for the first 3 years, but thereafter maintenance is re- quired for restriping, weed control, light replacement, shoulder repairs, etc. For one section of a particular highway, these costs ...
*June 24, 2013*

**Finance**

A building is priced at 125,000. If a down payment of 25,000 is made and a payment of 1,000 every month thereafter is required, how many months will it take to pay for the building? Interest is charged at a rate of 9% compounded monthly.
*May 26, 2013*

**Finance**

Omega Instruments has budgeted $300,000 per year to pay for certain ce- ramic parts over the next 5 years. If the company expects the cost of the parts to increase uniformly according to an arith- metic gradient of $1 0,000 per year, what is it expecting the cost to be in year...
*May 26, 2013*

**practice question**

How do i go about solving this one? A cash flow sequence starts in year 1 at $3000 and decreases by $200 each year through year 10. (a) Determine the value of the gradient G; (b) determine the amount of cash flow in year 8; and (c) determine the value of n for the gradient. ...
*May 26, 2013*

**economics**

Pls Help. Not too sure how to do this question. Someone wants to set aside money for their newborn daughters college funds. He estimates she would need 25,000 on her 17, 18, 19 and 20, birthdays. If he plans to make uniform deposits starting 3 years from now and through her 16...
*May 26, 2013*

**Physics**

Anyone for B_0 for both cases? Problem 3) b)?
*May 8, 2013*

**Math**

Sarah was cutting fabric for a quilt. She cut a strip of fabric that was 19 1/8 inches long into 5 equal pieces. When she was finished cutting Sarah had a piece that was 2 1/4 inches long. How long was each piece that she cut for the quilt?
*April 21, 2013*

**Math**

The elevation of the surface of the Dead Sea is -424.3 meters. In 2005, the height of Mt. Everest was 8,844.33 meters. How much highernwas the summit of Mt. Everest?
*April 21, 2013*

**chemistry**

lewis structure of HOCH2S-
*March 13, 2013*

**Chemistry 1001/104**

Hey Walter, for this we use the arrhenius equation: In(K2/K1)= -Ea/R (1/T2-1/T1) As it says the reaction rate doubles. so for instance if you take K1= 1 then K2 will equal to 2. Now plug this into In(K2/K1)= -Ea/R (1/T2-1/T1) Now after we do In(K2/K1)= 0.693 0.693=-Ea/R (1/T2...
*March 8, 2013*

**math**

(16xy^3/-24x^4y)^-3 simplify the rational expression in the form A/B. Single fraction with only positive exponents.
*January 19, 2013*

**math**

*cubic square root*125h^9s^1/*cubic square root*h^-6s^-1 The expression above equals kh^rs^t where r, the exponent of h, is..? and t, the exponent of s, is...? and k, the leading coefficient is...? all answers should be rational numbers
*January 19, 2013*

**math**

Simplify the rational expression in the form A/B. X^-2+X^-4. Express the final result in a single fraction using positive exponents only.
*January 19, 2013*

**math**

multiply both sides by 2 and add them together... were you given formulas?
*January 1, 2013*

**math**

You can use the pythagorean theorem (c^2=a^2+b^2, where "c" is the hypotenuse and "a" and "b" are the other sides) to find the length of the other side. Manipulate it to get c^2-a^2=b^2, then take the square root of the answer to get the length of...
*January 1, 2013*

**Calculus**

The statement is true, because f'(x) deals with the slope of a tangent line. At any extrema (maximum or minimum point), the tangent line will be horizontal, meaning that it has a slope of 0. Since f'(x) is the slope of the tangent line, we can say that f'(x)=0 at ...
*January 1, 2013*

**precal**

fixed typo ((sinx + cosx)/(1 + tanx))^2 + ((sinx - cosx)/(1 - cotx))^2 = 1
*November 2, 2012*

**precal**

thanks :)
*November 2, 2012*

**precal**

please help i can't find the answer for this question. i can only manipulate one side of the equation and the end result has to equal the other side. Problem 1. ((1 + sinx)/cosx) + (cosx/(1 + sinx)) = 2secx
*November 2, 2012*

**chem**

Is this the correct equatioin for the reaction of cyclohexene with MnO4- ? C6H10 + MnO4- ----> C6H10(OH)2 + MnO2
*February 20, 2012*

**Physics Help**

I am having trouble with part b myself but for part c the only force is gravity. So F=ma =.0008kg*9.8m/s^2 =0.00784N
*February 16, 2012*

**English**

I'm stuck on this SAME question.
*February 13, 2012*

**Physics**

A skier of mass 71.0 kg is pulled up a slope by a motor-driven cable. How much work is required to pull the skier 62.2 m up a 37.0 slope (assumed to be fric- tionless) at a constant speed of 2.0 m/s? The acceleration of gravity is 9.81 m/s2 .
*January 9, 2012*

**chemistry**

One of the by-products of a reaction is 2-methyl-2-butene. A) Suggest a mechanistic pathway for the formation of this alkene. B) How is this by-product removed during the purification?
*October 28, 2011*

**science**

An average diameter of a star is approximately 1 X 10^9 m and an average diameter of a galaxy is 1 X 10^21 m. Considering the given data, apply a sense of scale calculation to determine if when a galaxy’s diameter is scaled down to the length of Manhattan (21.6 km long), ...
*October 10, 2011*

**science**

An average diameter of a star is approximately 109 m and an average diameter of a galaxy is 1021 m. Considering the given data, apply a sense of scale calculation to determine if when a galaxy’s diameter is scaled down to the length of Manhattan (21.6 km long), would the ...
*October 10, 2011*

**calculus**

Follow this link please! It is an interactive question that I just cannot figure out webwork.math.nau.edu/webwork2/CFisher_136/Continuity/3/?user=aed73&effectiveUser=aed73&key=KwyySMKGHvKe32dogu0ViC6rI90u7iI9&displayMode=jsMath&showOldAnswers=1
*September 16, 2011*

**calculus**

thank you! I actually figuredit out right after I submitted this lol
*September 16, 2011*

**calculus**

For what value of the constant c is the function f continuous on the interval negative infinity to positive infinity? f(x)={cx2+7x if x<2 x3−cx if x> or =2
*September 16, 2011*

**calculus**

For what value of the constant c is the function f continuous on the interval negative infinity to positive infinity? f(x)={cx2+7x if x<2 x3−cx x2 x2
*September 16, 2011*

**medical billing and coding**

which of the following is an expanded option for participation in private health care plans? A-medicare part A. B-Medicare part B. C- medicare advantage or D- medigap
*August 28, 2011*

**physics**

The physics of electric potential energy at one corner of a triangle. Two charges, q1 = +5.0 ìC and q2 = -2.0 ìC are 0.50 m apart. A third charge, q3 = +6.0 ìC is brought from infinity to a spot 0.50 m from both charges so that the three charges form an ...
*April 28, 2011*

**physics**

The physics of an electron moving from one plate to another. An electron acquires 4.2 x 10-16 J of kinetic energy when it is accelerated by an electric field from Plate A to Plate B. What is the potential difference between the plates, and which plate is at a higher potential?
*April 28, 2011*

**physics**

The physics of an electron falling through a potential difference. How much kinetic energy will an electron gain (joules) if it falls through a potential difference of 350 V?
*April 28, 2011*

**physics**

The physics of moving a small charge through a potential difference. How much work is needed to move a -8.0 ìC charge from ground to a point whose potential is +75 V?
*April 28, 2011*

**physics**

The physics of electric field between two charges. What is the magnitude and direction of the electric field at a point midway between a -8.0 ìC charge and a +6.0 ìC charge? The -8.0 ìC charge is 4.0 cm to the left of the +6.0 ìC charge. If a charge...
*April 28, 2011*

**physics**

The physics of the DNA molecule. The two strands of the DNA molecule are held together by electrostatic forces. There are four bases which make up the DNA molecule, thymine (T), adenine (A), cytosine (C), and guanine (G). In two of the bases, thymine and adenine, an oxide ion ...
*April 28, 2011*

**math**

of the 900 students 585 went to college what percent is that? a)150% b)65% c)90% d)58.5%
*April 25, 2011*

**english**

THE second one.
*April 25, 2011*

**physics**

One of the moons of Jupiter is Io. The distance between the centre of Jupiter and the centre of Io is 4.22 x 10^8 m. If the force of gravitational attraction between Io and Jupiter is 6.35 x 10^22 N, what must be the mass of Io?
*April 24, 2011*

**physics**

The physics of satellite motion around Jupiter. A satellite of mass 2.00 x 104 kg is placed in orbit 6.00 x 105 m above the surface of Jupiter. Please refer to the data table for planetary motion included in this lesson. a) Determine the force of gravitational attraction ...
*April 24, 2011*

**physics**

The physics of energy and Earth's moon as a satellite. The moon is an Earth satellite of mass 7.35 x 10^22 kg, whose average distance from the centre of Earth is 3.85 x 10^8 m. a) What is the gravitational potential energy of the moon with respect to Earth? b) What is the ...
*April 24, 2011*

**physics**

The physics of gravity and satellite motion around Jupiter. A satellite of mass 2.00 x 104 kg is placed in orbit around Jupiter. The mass of Jupiter is 1.90 x 1027 kg. The distance between the satellite and the centre of Jupiter is 7.24 x 107 m. a) Determine the force of ...
*April 24, 2011*

**physics**

The physics of orbital radius and orbital period of a planet. If a small planet were discovered whose orbital period was twice that of Earth, how many times farther from the sun would this planet be?
*April 24, 2011*

**physics**

A roller coaster of mass 1000.0 kg passes point A with a speed of 1.80 m/s? point a= 30m point b= 0m point c= 25m point d= 12m 1. What is the total mechanical energy of the roller coaster at point A? 2. What is the speed of the roller coaster at point B? 3. What is the ...
*April 24, 2011*

**physics**

The physics of a golf ball and kinetic energy. When a 0.045 kg golf ball takes off after being hit, its speed is 41 m/s. a) What is the kinetic energy of the ball after it has been hit? b) How much work is done on the ball by the club? c) Assume that the force of the club acts...
*April 24, 2011*

**physics**

1. The physics of Mars and its two moons. Mars has two moons, Phobos and Deimos (Fear and Panic, the companions of Mars, the god of war). Deimos has a period of 30 h, 18 min and a mean distance from the centre of Mars of 2.3 x 104 km. If the period of Phobos is 7 h, 39 min, ...
*April 24, 2011*

**English**

dont say im ancient im just old
*April 20, 2011*

**English 101**

I forgot to mention what questions I need to answer. 1. With what kind of couples is the speaker comparing himself and his partner. What is his hypothesis about why they are different? 2. There are other smaller comparisons that appear in the poem. What are they and what to ...
*April 3, 2011*

**English 101**

I am pretty good at writing papers, but poetry is my weakness. I have to read "For C" by Richard Wilbur and I am having the hardest time analyzing it. Please help me!
*April 3, 2011*

**chemistry**

A 10.00g sample of a mixture of CH4 and C2H4react with O2 at 25C and 1 atm to produce CO2 and water. If the reaction produces 520kJ of heat what is the mass percent of CH4 in the mixture? I don't want the answer just how to o
*March 14, 2011*

**chemistry**

A 10.00g sample of a mixture of CH4 and C2H4react with O2
*March 14, 2011*