Thursday

September 29, 2016
Total # Posts: 189

**Physics**

A car travelling at 90 km/hr sounds it horn as it approaches a stationary cyclist.if the car horn is at 512 Hz and temperature of air is 10 degree centigrade, what is the frequency of the sound waves reaching the cyclist as car approaches.

*June 5, 2016*

**Physics**

What is the final speed of an object and how far does it travel while accclerating if its initial speed is 10m/s and it accelerates at 8.9m/s squared for 5 s

*May 3, 2016*

**math**

Isnt five divided by 24 invalid?

*January 19, 2016*

**Physics**

if mars orbits the sun at an angular velocity of 1.06x10-7 rad/s, how long is a year on mars in earth days assuming it travels in a circular orbit?pls explain

*January 10, 2016*

**united**

write five sentience about my birthday

*November 4, 2015*

**Math**

Estimate. Then find the sum 540,943 + 382093

*October 6, 2015*

**mabathoana high school maseru**

i need help of solution of question

*August 27, 2015*

**Ap European**

In what respect must each of the following share in the war guilt? World war 1 Austria,Serbia,Russia,France,Britain,German

*April 22, 2015*

**Ap European**

In what respect must each of the following share in the war guilt? Austria,Serbia,Russia,France,Britain,Germany

*April 22, 2015*

**English**

In america, our government is based on the principles of society and the rights of man. do you agree or disagree? List at list 3 example.

*April 21, 2015*

**Physic**

A 75-W, 120-V bulb is connected in parallel with 25-W, 120-V bulb. What is the net resistance?

*April 12, 2015*

**Physic**

A 2.5-kohms and a 3.7-kohms resistor are connected in parallel; this combination is connected in series with a 1.4 kohms resistor. If each resistor is rated at 0.5W (maximum without overheating), what is the maximum voltage that can be applied across the whole network?

*April 12, 2015*

**Physic**

Two resistors when connected in series to a 120-V line use one-fourth the power that is used when they are connected in parallel. If one resistor is 4.8 kohms. what is the resistance of the other?

*April 12, 2015*

**Physic**

A 2.5-kohms and a 3.7-kohms resistor are connected in parallel; this combination is connected in series with a 1.4 kohms resistor. If each resistor is rated at 0.5W (maximum without overheating), what is the maximum voltage that can be applied across the whole network?

*April 9, 2015*

**Physic**

Two resistors when connected in series to a 120-V line use one-fourth the power that is used when they are connected in parallel. If one resistor is 4.8 kohms. what is the resistance of the other?

*April 9, 2015*

**Physic**

A 75-W, 120-V bulb is connected in parallel with 25-W, 120-V bulb. What is the net resistance?

*April 9, 2015*

**math**

Identify the solution(s) of the system of equations, if any. x + 2y = 7 3x - 6y = 3 (4, ) (4, ) (, 4) (, 4)

*October 21, 2014*

**math**

what the difference of 13 over 32 and 1 over 2

*October 16, 2014*

**corporate finance**

Your finance text book sold 45,500 copies in its first year. The publishing company expects the sales to grow at a rate of 20.0 percent for the next three years, and by 7.0 percent in the fourth year. Calculate the total number of copies that the publisher expects to sell in ...

*July 30, 2014*

**physics**

Calculate the speed of water (in m/s) flowing from a pipe at the bottom of an open topped barrel which has a water level 138 cm high in it.

*June 21, 2014*

**physics**

A sound registers 77.9 decibels on a detector. What is the intensity in W/m2? Assume the threshold of human hearing is 1.0×10-12 W/m2. Give your answer in picowatts/m2. 1 pW = 1×10-12 W/m2

*June 21, 2014*

**physics**

Calculate the speed of a wave in m/s along a taut string with tension 139 Newtons and a mass per unit length of 3.6 grams per metre.

*June 21, 2014*

**college physics**

"The Magnitude of the buoyant force is equal to the weight of fluid displaced” is a statement of which principle in the study of fluids? Select one: a. Pascal's Principle b. Archimedes' Principle c. Bernouilli’s Principle d. The Equation of Continuity

*June 16, 2014*

**physics**

An object of mass 1.6 kg is dropped from a height of 2.9 metres. It lands with a speed of 2.8 m/s. How much energy was lost due to air resistance? (Give your answer to 2 s.f., expressed as a magnitude)

*June 9, 2014*

**physics**

Calculate the magnitude of the force if a ball of mass 249.9 grams, and initial velocity +16.5 m/s is struck back on the same path with a final velocity of -22.0 m/s. Assume the contact time is 3.1 milliseconds. Use 2 s.f.

*June 9, 2014*

**physics**

An astronaut, mass 128.2 kg including spacesuit, pushes off from the International Space Station (mass 110 tons) with a speed of 1.2 m/s. What is the speed of the Space station in the opposite direction? Use 2 s f. for your answer

*June 9, 2014*

**Physics **

A system gains 473J of kinetic energy while losing 271J of potential energy. The thermal energy increases by 127J . Use an energy bar chart of this process to find the external work Wext.

*June 5, 2014*

**Physics **

A block of mass 12.0 kg is initially sitting at rest on a 30.0o incline. There is a spring mounted to the ramp with spring constant k = 13500 N/m. The block is released to slide down the incline and comes to a stop momentarily after the spring has been compressed a distance ...

*May 30, 2014*

**Chem**

Calculate the standard cell potential given the following standard reduction potentials: Al3++3e−→Al;E∘=−1.66 V Fe2++2e−→Fe;E∘=−0.440 V

*May 18, 2014*

**Language Arts (english)**

1.In general terms, how do the townspeople in “The Handsomest Drowned Man in the World” react to the body which washes up on their shore? 2.Why do the townspeople react to Esteban as they do? What is he to them? 3.What is a fable, how might “The Handsomest ...

*May 16, 2014*

**Algebra**

How do I solve: One leg of a right triangle is 4 m longer than the other. If the length of the hypotenuse is 18 m, how long are the other two legs?

*April 29, 2014*

**Math **

Find the z-score such that the area under the standard normal curve to the left is 0.25

*December 2, 2013*

**math**

Find the value of z = 0.94

*December 2, 2013*

**Solid mensuration**

The bases of a triangular right prism are apart. find the volume and the total surface area of the prism if one side of the quilateral triangular base measures 6cm

*April 25, 2013*

**Physics**

In a photoelectric-effect experiment it is observed that no current flows unless the wavelength is less than 570nm . A)What is the work function of this material? W0= in eV B) What is the stopping voltage required if light of wavelength 420nm is used? stopping voltage in V

*April 23, 2013*

**physics **

A gamma-ray photon produces an electron-positron pair, each with a kinetic energy of 275keV . What was the energy of the photon? E=in MeV What was the wavelength of the photon? wavelength in m Please help thank you!

*April 22, 2013*

**Physics**

In a photoelectric-effect experiment it is observed that no current flows unless the wavelength is less than 570nm . A)What is the work function of this material? W0= in eV B) What is the stopping voltage required if light of wavelength 420nm is used? stopping voltage in V

*April 22, 2013*

**phics**

In an experiment on motion, a cart weighing 240 N was pulled up an inclined plane. Which of the following would be the expected reading on the spring scale as the cart is pulled up an inclined plane set upon two books

*April 11, 2013*

**math**

Your question: "The shorter diagonal of a rhombus is 50 mm long. Each of its obtuse angles measures 140. Find the length of each side."

*February 20, 2013*

**cmsd**

Your question: "The shorter diagonal of a rhombus is 50 mm long. Each of its obtuse angles measures 140. Find the length of each side."

*February 20, 2013*

**Math**

Mark bought 54 cm of lace and 2m 45cm of black lace. How much total lace in meters did he buy?

*December 2, 2012*

**posibility**

One problem encountered by developers of the space shuttle program is air pollution in the area surronding the launch site. Acertain direction from the launch site is considered critical in terms of hydrogen chloride pollution from the exhaust cloud. It has been determined ...

*November 16, 2012*

**Finance **

The following information was available as of the close of business June 1, 2004 on government of Canada bonds. Coupon...Maturity.....Price.....Yield 5.00%......June 1, 2005......102.35......2.60 10.50%......June 1, 2006......113.91......3.26 8.50%......June 1, 2007.....107.41...

*November 6, 2012*

**Math 102**

What number must be added to the numerator and subtracted from the denominator of 10/23 to obtain a fraction equivalent of 6/5? Please provide step by step, this is a word problem for rational expressions. Thank you

*October 4, 2012*

**Business- Labor**

true or false Arbitration and grievance procedures have done virtually nothing to prevent chaos and disorder in labor relations.

*September 18, 2012*

**finite math**

Given n(A')=23, n(B')=16, and n((A [intersect] B) U (AUB)'))= 24, find (A [intersect] B) I apologize but intersect was the best way I found to represent the upside down U symbol.

*September 9, 2012*

**Business- Labor**

how sympathetic are you to the statement of a former general motors chairman that offering a union leader a seat on GMs board of directors made "as much sense as having a member of GM's management sitting on the board of an international union?" Explain. I need ...

*September 6, 2012*

**finite math**

suppose that 3 digits are selected at random from the set S={1,2,3,4,5,6} and are arranged in random order. Find the probability that the resulting 3-digit number is less than 300.

*September 4, 2012*

**Business- Labor**

I agree, they are typically failures. They are not able to create a healthy balance between supply and demand.

*August 23, 2012*

**Business- Labor**

governmental wage and price controls should never be tried again. they have been failures. agree? why or why not?

*August 23, 2012*

**Business- Labor**

how would this classify them as second-class citizens?

*August 23, 2012*

**Business- Labor**

do you believe that public employees should be able to employ collective bargaining for wage increases or should the ‘free market’ continue to dictate wages in the public sector? Why or why not?

*August 23, 2012*

**Business- Labor**

declining labor union membership

*August 12, 2012*

**Business- Labor**

Labor’s membership stagnation in the last half-century can be explained by several formidable obstacles. Explain

*August 12, 2012*

**Physics**

For a record playing at 45 rpm, find the frequency and the angular velocity. Frequency= Angular velocity=

*April 24, 2012*

**chemistry**

How many grams of carbon can be burned in 15 dm3 of oxygen and many dm3 of CO2 is produced?

*April 17, 2012*

**chemistry**

how many grams of magnesium are required to liberate 250 cm3 of Hydrogen gas from HCL

*April 17, 2012*

**alebra**

how do i simplify 3m+n/4n^2m + 3m +n +5/4n^2m

*March 1, 2012*

**alegbra**

what is the least common multiple of 16x^3yz^3 and 14z^6xy^4c

*March 1, 2012*

**alegbra**

how do i simpllify 5/x + 4/x^2 - 3/x^3

*March 1, 2012*

**physics**

assume he do not bounce at all

*February 21, 2012*

**physics**

if one man 50 kgs fell from 10 meter high builder, how much impact force when he hit the concrete ground and how long the time it happen.

*February 21, 2012*

**College Physics**

Find the minimum work required to carry a truckload of furniture weighing 1.99 104 N to a third-story apartment, 24.0 m above the truck.

*October 14, 2011*

**College Physics**

A 4.30 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 2.60 m, before compressing a spring of force constant 2.20 104 N/m. Find the maximum compression of the spring.

*October 14, 2011*

**College Physics**

A 4.30 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 2.60 m, before compressing a spring of force constant 2.20 104 N/m. Find the maximum compression of the spring.

*October 14, 2011*

**College Physics**

A 4.30 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 2.60 m, before compressing a spring of force constant 2.20 104 N/m. Find the maximum compression of the spring.

*October 14, 2011*

**College Physics**

A 4.30 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 2.60 m, before compressing a spring of force constant 2.20 104 N/m. Find the maximum compression of the spring.

*October 14, 2011*

**College Physics**

A 4.30 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 2.60 m, before compressing a spring of force constant 2.20 104 N/m. Find the maximum compression of the spring.

*October 14, 2011*

**Physics**

Where is the 15 coming from? I thought that you may have meant 25 so I calculated 1.21*9.8*25*cos 25 and I got the answer wrong.

*October 14, 2011*

**mystery trip**

can you help me unscramble this famous couple names enargraaetnmgremaad

*October 11, 2011*

**Physics**

During a baseball game, a batter hits a pop-up to a fielder 83 m away. The acceleration of gravity is 9.8 m/s^2. If the ball remains in the air for 6.5 s, how high does it rise? Answer in units of m

*October 1, 2011*

**english 30-1**

write a short compostion discussing social satire in happy event. what aspects of society is satized? how are devices like irony and hyperbole is used to achieve satire? what changes does the author suggest?

*September 23, 2011*

**chemistryt**

Hexane has a density of 0.659 g/ml. How many milliliters (mL) would a student need to pour in order to get 49.5 g of hexane?

*September 12, 2011*

**Physics**

A baseball is tossed at a steep angle into the air and makes a smooth parabolic path. Its time in the air is t and it reaches a maximum height h. Assume that air resistance is negligible. a. Show that the height reached by the ball is gt^2/8. b. If the ball is in the air for 4...

*July 17, 2011*

**Physics**

A rock thrown from a bridge hits hte water below at a horizontal distance x directly below the throwing point. The rock travels a smooth parabolic path in time t. a. Show that the virtical distance of the bridge above water is 1/2gt^2. b. What is the height of the bridge if ...

*July 17, 2011*

**mathematics**

2a^2-3a-2/4a^2-1 (4a^2-1 = denominator) divided by a^2-4/2a^2-5a+2 <--- denominator

*July 3, 2011*

**physics**

If you do 100 j work in 50 seconds, then your Power output is

*June 18, 2011*

**statistics**

B is the answer

*June 10, 2011*

**statistics**

In a binomial distribution: A) the random variable X is continuous. B)the probability of event of interest (pie symbol)is stable from trail to trial C) the number of trials n must be at least 30 D) the results of one trial are dependent on the results of the others. I narrowed...

*June 10, 2011*

**MATH(quick Help please)**

Out of 42 kids in a class twice as many failed Ela as math,4 failed both. If 7 failed neither, find how many failed each subject. Show work thanks

*June 6, 2011*

**Health(quick question)**

why do you need Fiber in foods and is it used to build up muscles

*June 4, 2011*

**ELA (QUICK QUESTION)**

Thanks you gave me great ideas

*May 31, 2011*

**ELA (QUICK QUESTION)**

i need some postive and negative aspects of schools. i need help starting my intro can you help me thanks

*May 31, 2011*

**Math**

Here's a frequency distribution table for the speeds of a sample of automobiles. Speed(MPH) Frequency Midpoint(I found) 50-54 2 52 55-59 4 57 60-64 5 62 65-69 10 67 70-74 9 72 75-79 5 77 I am trying to find the variance but whatever I do I can't seem to find the answer...

*May 27, 2011*

**please explain poster thx**

i found this propaganda poster can you explain it on the poster it says When you ride Alone you ride with Hitler. The next poster i found was Be ready join now CAn you explain these two posters thanks

*May 26, 2011*

**Ela(summary)**

thanks you really helped me

*May 20, 2011*

**Ela(summary)**

Can you give my a nice summary for milk weed? i really dont get the book i read it

*May 20, 2011*

**History**

Why did Arthur Ashe created the National Junior Tennis?

*May 16, 2011*

**SCIENCE(easy)**

explain what might happen to a boulder(large/rock) that is left in your school yard for a long time.

*May 15, 2011*

**TECH(recycle)**

I'm making a recycle logo i need some good ideas to put in the logo and can u give me examples of good recycling logos

*May 9, 2011*

**logos**

i need some amazing logos can u help

*May 6, 2011*

**free verse poems please**

i need really good examples of free verse poems please

*May 5, 2011*

**POEMS tanka poem**

examples of tanka poems thanks

*May 5, 2011*

**poems**

I NEED EXAMPLES OF HAIKU POEMS

*May 5, 2011*

**math**

Condensing 1/2logs+logm+logh-2logI-logd-logk logt+logh+logx-2logl-log0-logl

*May 5, 2011*

**math**

solve -4+7logx=10 & log(x+3)+log(x-2)=log14

*May 5, 2011*

**Math simple question**

angles 1 and 2 are adjacent angles on a line. What is the sum of the measures of the angles? a.30 b.60 c.90 d. 180 I think the answer is b.

*May 4, 2011*

**Living on your own**

What would the greatest financial challenge in living on your own be? I'm guessing that would be paying off utilties, bills, grocery.

*March 28, 2011*