Monday

December 22, 2014

December 22, 2014

Total # Posts: 75,771

**physics**

A jetskier is moving at 8.9 m/s in the direction in which the waves on a lake are moving. Each time he passes over a crest, he feels a bump. The bumping frequency is 1.15 Hz, and the crests are separated by 5.8 m. What is the wave speed?
*December 5, 2014*

**physics**

The speed of a transverse wave on a string is 457 m/s, while the wavelength is 0.228 m. The amplitude of the wave is 2.05 mm. How much time is required for a particle of the string to move through a total distance of 1.34 km?
*December 5, 2014*

**business finance**

Your client is 40 years old, and she wants to begin saving for retirement, with the first payment to come one year from now. She can save RM5,000 per year, and you advise her to invest it in the stock market, which you expect to provide an average return of 9 percent in the ...
*December 5, 2014*

**business finance**

You want to buy a small house that costs RM100,000. You have RM10,000 for a down payment and repaid in equal installments at the end of each of the next 3 years. The interest rate is 7 percent compounded annually. a. Calculate how much you need to pay for each year. b. Set up ...
*December 5, 2014*

**chemistry**

) Indicate how each of the following errors would affect(increase, decrease, or no change) your calculated value for the molar volume of O2 at STP (assuming that you complete the expiriment otherwise correctly). In each case, explain your answer. A. Your sample was not ...
*December 5, 2014*

**chemistry **

How many milliliters of 0.50M NaOH solution are required to titrate 20.0mL of a 0.20M H2SO4 solution to an end point?
*December 4, 2014*

**HISTORY**

True False Following the conclusion of the war, Lincoln’s second term in office was much more peaceful. Not sure about this question, because Lincoln talked about peace in his speech but his term was so short because he was shot.
*December 4, 2014*

**HISTORY**

True False The Ku Klux Klan had its origins in a college fraternity in South Carolina in the 1830s. I'd say false, didn't they form the KKK in 1860s? Rutherford Hayes won a landslide victory in the election of 1876. I'm not sure about this one because he initially ...
*December 4, 2014*

**HISTORY**

The North won the Civil War because A. they had superior numbers of military forces B. the South’s principle of States’ Rights sometimes prevented them for working together successfully C. the North’s naval blockade prevented the South from selling much of its ...
*December 4, 2014*

**Help math**

the weight of 2 science fiction books and 1 autobiography is 5/6w pounds. what is the total weight of 4 of these science fiction books and 2 of these autobiographies?
*December 4, 2014*

**art pleaase help**

Creating a large scale monument of an individual could indicate to the viewer that a.this was a community center b.geometric and line patterns are symbolically important. c.landscapes are appealing to society. d.certain individuals in society are important.
*December 4, 2014*

**Test**

What are good ways to remember facts for a quiz
*December 4, 2014*

**Great Expectations**

Yes, I have read it, but I don't seem to remember this one or find it online.
*December 4, 2014*

**Great Expectations**

Who lives with the aged parent in Great Expectations?
*December 4, 2014*

**Math**

I know now Add them together without squaring.
*December 4, 2014*

**Math**

Find the shortcut. Solve these problems. Then find and explain a shortcut method for finding the answer. 52(Squared) - 42 (squared) = 82 (Squared) - 72 (Squared) = 122 (Squared) - 112 (Squared) = 312 (Squared) - 302 (Squared) = 892 (Squared) - 882 )(Squared =
*December 4, 2014*

**math**

a floor plan has been prepared for a new building, drawn to a scale of 1/2 inch = 1 foot. A certain area is drawn to a scale of 1 foot long and 7 1/2 wide on the floor plan. the actual dimensions of theis areas in the building are?
*December 4, 2014*

**Physics**

A projectile, fired with unknown initial velocity, lands 18.4 s later on the side of a hill, 2740 m away horizontally and 469 m vertically above its starting point. (Ignore any effects due to air resistance.) (a) What is the vertical component of its initial velocity? 115.741 ...
*December 4, 2014*

**Great Expectations**

What does Pip do after going to London? Does he join a school? How does he learn good manners? I've read the story, but these exact details aren't clear to me.
*December 4, 2014*

**chemistry**

A sample of 0.250 g of nickel complex was titrated with 0.150 M EDTA. If the titration of the nickel sample required 7.5 mL of EDTA to reach the equivalence point, what is the percent nickel in the sample?
*December 4, 2014*

**physics**

A projectile is fired into the air from the top of a cliff of height h = 186 m above a valley. Its initial velocity is v0 = 64.8 m/s at an angle θ = 59° above the horizontal. Where does the projectile land? (Ignore any effects due to air resistance.)
*December 4, 2014*

**college algebra**

Find a12 when a1 = 5 and r = – 2.
*December 4, 2014*

**math**

f(x)=x^6-2x^4-81x^2+162;-3
*December 4, 2014*

**Physics**

Question: A force of 25N pushes a curling rock from rest 1.0 m across a frictionless surface. Find the FINAL kinetic energy. attempts: Well i guess it would be changeinEk so i tried Wnet=changeinEk fnet x changeinD = 1/2mvf^2-1/2mvi^2 to fnet x changeinD +1/2mvi^2=1/2mvf^2 ...
*December 4, 2014*

**Math**

A container holds 5 quarts when filled now it contains 3 3/4 quarts of water. How much more water must be added to fill the container
*December 4, 2014*

**Physics**

Question: A force of 25N pushes a curling rock from rest 1.0 m across a frictionless surface. Find the FINAL kinetic energy. attempts: Well i guess it would be changeinEk so i tried Wnet=changeinEk fnet x changeinD = 1/2mvf^2-1/2mvi^2 to fnet x changeinD +1/2mvi^2=1/2mvf^2 ...
*December 4, 2014*

**Biology**

How is ATP released as heat? Where does the heat go?
*December 4, 2014*

**Math**

A savings account with a current balance of $5,000 earns 2.75% annual interest, compounded continuously. To the nearest dollar, what will be the account balance in 10 years?
*December 4, 2014*

**Pre-Calc/Trig...**

I have one way, but cant think of another? Show two ways of finding y if y = log4 64. Explain your thinking. 4^x=64 x=3
*December 4, 2014*

**Pre-Calc/Trig...**

Alright, thanks. (:
*December 4, 2014*

**Pre-Calc/Trig...**

Write the equation y = log x in exponential form.
*December 4, 2014*

**Math**

Nevermind, I worked the answer out
*December 4, 2014*

**Math**

A golf ball is hit off the top of a cliff that is 75 feet tall at an angle of 45° to the horizontal with an initial velocity of 80 feet per second. The quadratic equation shown below models the height, h(x), of the ball when it is x feet from the cliff’s edge. How far...
*December 4, 2014*

**Coll Algebra**

A grain barge travels on a river from point a to point b unloading and loading again. The barge travels 5mph relative to water. the river flows downstream at a rate of 1mph. if the trip upstream takes 2hrs longer than the trip downstream how far is it from point a to point b
*December 4, 2014*

**physics**

A projectile is fired into the air from the top of a cliff of height h = 186 m above a valley. Its initial velocity is v0 = 64.8 m/s at an angle θ = 59° above the horizontal. Where does the projectile land? (Ignore any effects due to air resistance.)
*December 4, 2014*

**physics**

A stone thrown horizontally from the top of a 18-m tower hits the ground at a point 18 m from the base of the tower. (Ignore any effects due to air resistance.) (a) Find the speed at which the stone was thrown. m/s (b) Find the speed of the stone just before it hits the ground...
*December 4, 2014*

**Science**

In order for a child to inherit a recessive genetic disease, like sickle cell anemia, healthy must both have
*December 4, 2014*

**Science**

In order for a child to inherit a recessive genetic disease, like sickle cell anemia, healthy parents must both
*December 4, 2014*

**math **

Describe a situation in which it is better to round a mixed number up to the next whole number even if the fraction in the mixed number is closer to 1/2 than 1?
*December 4, 2014*

**child dev**

The early childhood educator who designed many teaching aids to promote printing in preschoolers through the child’s sense of touch was
*December 3, 2014*

**child dev.**

Rosa is a newborn. As she grows, which will she learn to control last?
*December 3, 2014*

**Math**

Expand and simplify (p+3)(p-7)
*December 3, 2014*

**Math**

why is 19 days , can you explain to me plz ...
*December 3, 2014*

**Math**

Whats 9 + 10
*December 3, 2014*

**Pre-Calc/Trig...**

okay thanks! :)
*December 3, 2014*

**Pre-Calc/Trig...**

If An is defined as a geometric sequence, is the sequence 1/an also a geometric sequence? Explain your reasoning
*December 3, 2014*

**physics**

An object of mass 2.0 kg starts from rest at the top of a frictionless curved ramp. At the bottom, it collides with and sticks to another 2.0-kg mass object. Together the objects then cross a small rough section where there is friction before leaving the edge of the table ...
*December 3, 2014*

**Symmetry**

⬇️➡️➡️➡️⬆️➡️⬆️⬅️⬆️⬆️ The end
*December 3, 2014*

**science**

A jellyfish can propel itself with jets of water pushed out of its bell, a flexible structure on top of its body. The elastic bell and the water it contains function as a mass-spring system, greatly increasing efficiency. Normally, the jellyfish emits one jet right after the ...
*December 3, 2014*

**Pre-Calc/Trig...**

Okay, thank you :)
*December 3, 2014*

**Pre-Calc/Trig...**

is this the correct formula for me to solve this? A bacteria culture has 2,000 bacteria. The number of bacteria increases by 5% each hour. How many bacteria are there after 12 hours? 2,000*0.05^(12-1)
*December 3, 2014*

**chemistry**

A sample of steam with a mass of 0.524g and at a temperature of 100 ∘C condenses into an insulated container holding 4.20g of water at 6.0∘C.( ΔH∘vap=40.7 kJ/mol, Cwater=4.18 J/g⋅∘C) Assuming that no heat is lost to the surroundings, what is ...
*December 3, 2014*

**Pre-Calc/Trig...**

Find S5 for a geometric series for which a1 = 81 and r = 1/9.
*December 3, 2014*

**Statistics**

a study states that for a particular area, the average income per family is $35,569 and the standard deviation is $8256. what percentage of families in that area earn below $ 25,000
*December 3, 2014*

**chemistry**

How much ice (in grams) would have to melt to lower the temperature of 355mL of water from 26∘C to 6∘C? (Assume the density of water is 1.0 g/mL.)
*December 3, 2014*

**chemistry**

Calculate the amount of heat required to completely sublime 71.0g of solid dry ice (CO2) at its sublimation temperature. The heat of sublimation for carbon dioxide is 32.3 kJ/mol.
*December 3, 2014*

**Pre-Calc/Trig...**

Given a geometric sequence with a1 = 6 and r = 2/3, write an explicit formula for An, the nth term of the sequence.
*December 3, 2014*

**English**

1- What was Macbeth's reaction towards Lady Macbeth' death and why did Shakespeare choose to bring Lady Macbeth to an end? 2- How does Juliets death compare to the death of Lady Macbeth and why does Shakespeare bring Juliet to an end?
*December 3, 2014*

**physics**

A 2.9-kg cart starts up an incline with a speed of 2.7 m/s and comes to rest 3.0 m up the incline. The total work done (the work of the net force) on the cart is:
*December 3, 2014*

**Physics**

I don't understand the angle part. But thank you so much for the rest of it!
*December 3, 2014*

**Physics**

A projectile, fired with unknown initial velocity, lands 18.4 s later on the side of a hill, 2740 m away horizontally and 469 m vertically above its starting point. (Ignore any effects due to air resistance.) (a) What is the vertical component of its initial velocity? m/s (b) ...
*December 3, 2014*

**Pre-Calc/Trig...**

okay, thank you
*December 3, 2014*

**Pre-Calc/Trig...**

The nth term of a geometric sequence is given by an = 1/4(4)^n-1. Write the first five terms of this sequence.
*December 3, 2014*

**Pre-Calc/Trig...**

oh okay thanks
*December 3, 2014*

**Pre-Calc/Trig...**

Write the equation y = bx in logarithmic form.
*December 3, 2014*

**Physics**

A plastic bag is filled with nitrogen at atmospheric pressure and 22.0 oC. Assume that the mass of the bag is negligible and take the temperature of the outside air to be 0 oC. With the help of this "balloon" we want to lift a 50.0 kg girl off her feet. How large a ...
*December 3, 2014*

**Physics**

A projectile, fired with unknown initial velocity, lands 18.4 s later on the side of a hill, 2740 m away horizontally and 469 m vertically above its starting point. (Ignore any effects due to air resistance.) (a) What is the vertical component of its initial velocity? m/s (b) ...
*December 3, 2014*

**Physics**

You are trying out for the position of place-kicker on a professional football team. With the ball teed 50.0 m from the goalposts with a crossbar 3.05 m off the ground, you kick the ball at 28 m/s and 31° above the horizontal. (a) Is the field goal attempt good? no yes (b...
*December 3, 2014*

**Physics**

The range of a cannonball fired horizontally from a cliff is equal to the height of the cliff. What is the direction of the velocity vector of the projectile as it strikes the ground? (Ignore any effects due to air resistance.) ° (below the horizontal)
*December 3, 2014*

**Physics**

Nevermind, I got it. Thank you!
*December 3, 2014*

**Physics**

How would you find t? I can't get it.
*December 3, 2014*

**Physics**

A projectile is fired into the air from the top of a cliff of height h = 186 m above a valley. Its initial velocity is v0 = 64.8 m/s at an angle θ = 59° above the horizontal. Where does the projectile land? (Ignore any effects due to air resistance.)
*December 3, 2014*

**Physics**

A stone thrown horizontally from the top of a 18-m tower hits the ground at a point 18 m from the base of the tower. (Ignore any effects due to air resistance.) (a) Find the speed at which the stone was thrown. m/s (b) Find the speed of the stone just before it hits the ground...
*December 3, 2014*

**physics**

A small crack occurs at the base of a 15.0 m high dam. The effective crack area through which water leaves is 1.30 *10-3 m2 a) Ignoring viscous losses, what is the speed of water flowingthrough the crack? b) How many cubic meters of water per second leave thedam?
*December 3, 2014*

**physics**

A small crack occurs at the base of a 15.0 m high dam. The effective crack area through which water leaves is 1.30 *10-3 m2
*December 3, 2014*

**physics**

A cannon barrel is elevated at an angle of 45°. It fires a ball with a speed of 250 m/s. (For the following questions, ignore air resistance.) (a) What height does the ball reach? m (b) How long is the ball in the air? s (c) What is the horizontal range of the cannon? km
*December 3, 2014*

**physics**

A fire helicopter carries a 565 kg bucket at the end of a 16.7 m long cable. When the helicopter is returning from a fire at a constant speed of 22.5 m/s, the cable makes an angle of 20.5 ◦ with respect to the vertical. Find the horizontal force exerted by air resistance...
*December 3, 2014*

**English**

What is the simple predicate of the following sentence? The Saturn rocket made travel to the moon possible. A. Made B. Moon C. Possible {D. Travel}
*December 3, 2014*

**chemistry**

chem 1070?
*December 3, 2014*

**math**

2 h
*December 2, 2014*

**Helathcare Marketing**

2. Explain the vertical integration options and directions for the following providers:
*December 2, 2014*

**world history**

I really don't get this question ''without the english Civil war, democracy would never have developed.''make a case for or against this statement. give evidence to support your case. I really don't know how to do this
*December 2, 2014*

**math**

marty ate 4/6 of his pizza and luis ate 5/6 of his pizza..marty ate more pizza than luis how is that possible
*December 2, 2014*

**Chemistry**

Thank you this helped clearify things
*December 2, 2014*

**Chemistry **

What volume of oxygen gas at 20.9 c and 750 torr is needed to burn 3.00 liters of propane, C3H8 at the same temprrature and pressure? I know i use V1/n1=V2/n2, but how do i get n?
*December 2, 2014*

**Algebra**

The fuel efficiency for a certain midsize car is given by E(v) = −0.017v^ + 1.462v + 3.5 where E(v)is the fuel efficiency in miles per gallon for a car traveling v miles per hour. (a) What speed will yield the maximum fuel efficiency? Round to the nearest mile per hour. ...
*December 2, 2014*

**Math**

Find the possible values of b,h and l for a triangular prism with volume 21 cubic meters. How many ways can you do this? Sketch a diagram of one possible prism.
*December 2, 2014*

**Physics**

A plastic bag is filled with nitrogen at atmospheric pressure and 22.0 oC. Assume that the mass of the bag is negligible and take the temperature of the outside air to be 0 oC. With the help of this "balloon" we want to lift a 50.0 kg girl off her feet. How large a ...
*December 2, 2014*

**physics**

Two blocks with masses m1 = 1.20 kg and m2 = 2.90 kg are connected by a massless string, as shown in the Figure. They are released from rest. The coefficent of kinetic friction between the upper block and the surface is 0.300. Assume that the pulley has a negligible mass and ...
*December 2, 2014*

**ap calc**

The U.S. post office has a limit on the size of packages it will accept for mailing. the length plus the girth (distance around the middle) must be 84 inches or less. find the dimensions of the rectangular package with a square end, which will maximize the volume of the ...
*December 2, 2014*

**English**

who's more powerful- Juliet Capulet or Lady Macbeth I need some quotes too
*December 2, 2014*

**Math**

Can (6x - 1)/3 be simplified as 2x - 1/3?
*December 2, 2014*

**Math**

Chef has 25 pounds of strip loin. Trim loss on strip loin is 35% and the cooking loss is 80% of the trimmed weight. How many pounds of trimmed, cooked strip loin will the chef have left to serve to his customers?
*December 2, 2014*

**physics**

A plastic bag is filled with nitrogen at atmospheric pressure and 22.0 oC. Assume that the mass of the bag is negligible and take the temperature of the outside air to be 0 oC. With the help of this "balloon" we want to lift a 50.0 kg girl off her feet. How large a ...
*December 2, 2014*

**Physics**

A catapult on a cliff launches a large round rock towards a ship on the ocean below. The rock leaves the catapult from a height H of 32.0 m above sea level, directed at an angle θ above the horizontal with an unknown speed v0. The projectile remains in flight for 6.00 ...
*December 2, 2014*

**science**

300,000 m away
*December 2, 2014*

**science**

after a rock layer is eroded, whick additional event must occur to create and unconformity, or a gap , in the geologic record
*December 2, 2014*

**Physics**

A proposed space station includes living quarters in a circular ring 50.5 m in diameter. At what angular speed should the ring rotate so the occupants feel that they have the same weight as they do on Earth?
*December 2, 2014*

**Physics**

Two blocks with masses m1 = 1.20 kg and m2 = 2.90 kg are connected by a massless string, as shown in the Figure. They are released from rest. The coefficent of kinetic friction between the upper block and the surface is 0.300. Assume that the pulley has a negligible mass and ...
*December 2, 2014*

**Math**

How to solve for y? x = (3y + 1)/6
*December 2, 2014*

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