Thursday

July 24, 2014

July 24, 2014

Total # Posts: 171

**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.

**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

**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.

**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

**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)

**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.

**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

**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.

**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 o...

**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

**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 Drown...

**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?

**Math **

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

**math**

Find the value of z = 0.94

**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

**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

**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!

**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

**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

**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."

**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."

**Finance**

77

**Math**

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

**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 tha...

**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...

**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

**Business- Labor**

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

**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.

**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 h...

**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.

**Business- Labor**

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

**Business- Labor**

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

**Business- Labor**

how would this classify them as second-class citizens?

**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?

**Business- Labor**

declining labor union membership

**Business- Labor**

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

**Physics**

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

**chemistry**

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

**chemistry**

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

**alebra**

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

**alegbra**

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

**alegbra**

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

**physics**

assume he do not bounce at all

**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.

**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.

**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.

**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.

**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.

**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.

**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.

**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.

**mystery trip**

can you help me unscramble this famous couple names enargraaetnmgremaad

**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

**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?

**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?

**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...

**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 th...

**mathematics**

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

**physics**

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

**statistics**

B is the answer

**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...

**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

**Health(quick question)**

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

**ELA (QUICK QUESTION)**

Thanks you gave me great ideas

**ELA (QUICK QUESTION)**

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

**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...

**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

**Ela(summary)**

thanks you really helped me

**Ela(summary)**

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

**History**

Why did Arthur Ashe created the National Junior Tennis?

**SCIENCE(easy)**

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

**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

**logos**

i need some amazing logos can u help

**free verse poems please**

i need really good examples of free verse poems please

**POEMS tanka poem**

examples of tanka poems thanks

**poems**

I NEED EXAMPLES OF HAIKU POEMS

**math**

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

**math**

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

**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.

**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.

**chemistry**

A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 450 mL of a solution that has a concentration of Na+ ions of 0.700 M

**chemsitry**

Calculate the mass in grams of sodium bromide, NaBr, are needed to prepare 250.0 mL of a solution of sodium bromide that is 3.50% (m/v).

**math**

There are 1728 cubic inches in a cubic foot. Therefore, you divide 5040 by 1728: 5040 / 1728 = 2.92 cubic feet. It is easy to overlook that to get a cubic foot, you have 12 rows, 12 columns, and 12 layers of cubic inches. 12 x 12 x 12 = 1728

**geometry**

Find the perimeter and area of a right triangle if one leg measures 24 ft. and the other leg measures 70 ft. Please show the steps so I can do the next one. Thanks

**geometry**

Find the perimeter and area of a right triangle if one leg measures 24 ft. and the other leg measures 70 ft. Please show the steps so I can do the next one. Thanks

**math**

Dane is three years older than twice his brother's age,(b). Which algebraic expression below represents Dane's age? A. b+3 B. 2b+3 C. 3-2b D. 2b-3 I think the answer is C.

**math**

Daniel's bonus at work this year is $1000.00 added to 20% of his yearly salary. If X represents his yearly salary, which of the following algebraic expressions should be used to figure the amount of his bonus? A. 0.2(1000+x) B. 1000+x/0.2 C. 0.2x+1000 D. x/0.2+1000

**math**

I think its c.

**math**

Dane is three years older than twice his brother's age,(b). Which algebraic expression below represents Dane's age? A. b+3 B. 2b+3 C. 3-2b D. 2b-3

**math**

u the best teacher ever!!!!!!!!!!!!!!!!!!!!!

**math**

is the answer 10 miles

**math**

On the way to school, Bobby noticed the school bus travels 8 miles north, then turns west and goes 6 miles to get to school. If there were a road that went straight from Bobby's house to school, how long the road would be?

**math**

Which set of decimal numbers is in the order from least to greatest? A. .04,.004,.4,.043 B..004,.4,.043,.401 C..043,.401,.004,.04 D..004,.043,.4,.401

**math**

I say its c

**math**

a. 5/12=1.25/x b. 5/12=x/1.25 c. 5/x=12/1.25 d. x/5=12/1.25

**math**

At the school store, 5 pens sell for $1.25. Which proportion will help find the cost of 12 pens?

**math**

b is the answer

**math**

i think c is the answer

**math**

Which set of decimal numbers is in the order least to greatest? A. .04,.004,.4,.043 B..004,.4,.043,.401 C..043,.401,.004,.04 D..004,.043,.4,.401

**math**

The area of the figure is at least 400 square meters. Write and solve a two-step inequality to represent the possible values of x. Use 3.14 for 𝛑.