Sunday

April 20, 2014

April 20, 2014

Total # Posts: 130

**research**

How is the Spivak and Sharp (2008) study a replication of the prior study by Bales and colleagues (2005)?

**math**

A fisherman has caught a 5kg fish with a line and is lifting it vertically out of the water. While the fish is still in the water he raises it at a constant speed of 0.4 ms^-1. If the water resists this motion with a force of 6N, what is the tension in the line?

**physics**

three antinodes witha peak to peak displacement of 3 cm are observed on a vibrating string of length l and linear density the hanging mass is m what is the velocity of the propagation of transverse waves of the string

**Physics**

200 g of ic is at -5C is dropped into a container containing water at 65C. If the final temperature of the mixture reaches 21C, what mass of water must be present in the container?

**statistics**

Do students tend to improve their SAT mathematics (SAT-M) score the second time they take the test/

**Math**

forgot to convert so it will be 648.45N?

**Math**

right is 243N ?

**Math**

A simply supported beam is 6 meters long and has a mass of 15 kg/m of length. It carries loads = 180 N and 270 N at points 1.2 meters and 3.6 meters from the left end respectively. Find the reactions.

**science physics**

1.) What is the Magnitude of the electrostatic force on a +5 C charge 1.75 m to the left of a -2.5 C charge? (show your work) 2.) In What direction does the force on the +5 C charge act? 3.)Calculate the magnitude of the electric field of the -2.5 C charge at the location of t...

**statistics**

Find the standard deviation, Sigma, for the binomial distribution which has the stated values of n and p. Round your answer to the nearest hundredth. n = 639; p = 0.7

**Finance**

A company has total assets of $8,500,000 and its total turnover of 2.35 times. If the return on assets is 9 percent, what is its profit margin? Please help with a formula?

**Chemistry**

Comment on the relative acidities of h3po4 and the h2po4 ion? I don't understand what this question is asking? Would H3PO4 is a strong acid and will completely dissociate into ions in aqueous solution suffice?

**Algebra**

I need to find the slope of a ladder that is leaning against a building. The bottom of the ladder is 9 ft from the building and the top of the ladder is 16 ft above the ground.

**English**

Did you enjoy the Southern hospitality? What are the adjectives in that sentence?

**Math 12th grade**

Find the sum of each infinite series, or state that the sum doesn'nt exist 1/7+5/14+25/28+

**ricon high school**

A 6 kg ball is thrown by a catapult at 30 m/s. what is the ball's momentum?

**Statistics**

Tony’s father, an accountant, has been listening to Tony tell him about Type I errors and α = .05. He responds: “.05? That means you’re making an error one time in twenty! If I made errors 5 percent of the time I’d be out of a job so fast it would make...

**Chemistry**

second part = B

**programming**

Create an application in C# that will accept sales information and calculate the total bill. There are 3 products which can be sold: Product 1 with price of $2.98 Product 2 with price of $4.50 Product 3 with price of $9.75 The application should prompt the user for product and...

**2nd grade math**

____= 8+2?

**math**

Is 13/0 considered to be undefined?

**math**

I have 8 ones and 2 hundreds. I am between 270 and 280. what number am I?

**math**

i have fewer ones than tens. the value of my tens is 30.what two numbers can i be

**Math**

i got 24.81 would that be correct?

**please check**

y^2=1/2x^3 y=ã1/2x^3 y=1/1.41x^(3/2) derivative dy/dx=3/2.82^(1/2)

**Math**

Please help: find the length of the curve 2y^2 = x^3 from the origin to x=10.

**Math**

the acceleration of a particle is defined by the equation a= 4-t^2 with an initial velocity of two millimeters per second. Find the exact equation for the position of the particle if its initial position was zero.

**algebra**

during the first part of a trip, a conoeist travels 70 miles at a certain speed. the canoeist travles 7 miles on the second part of the trip at a speed of 5 mph slower. the total time for the trip is 5 hrs. Ehat is the speed on each part of the trip?

**algebra**

The speed of a passenger train is 16 mph faster than the speed of a freight train. The passenger train travles 300 miles in the same time it takes the freight train to travel 220 miles. find the speed of each train

**Calculus**

x^2-5/x lim x=0^+

**calculus**

Find the total differential for f(x,y,z)= cos(4x+3y+2z+1)

**calculus**

Just doing example questions to better understand. Find all first and second partial derivatives for the function u= xy^2+x^2y

**PHI 103**

In the truth table for an invalid argument

**calculus**

find dy/dx if y= (x^5)(e^(x^4))

**math**

hmmm bobpursly, i doubt a "basketball" player, one word not two,would pull out a compass mid court to calculate, but it is exactly what happens in their mind, if not just as an approximation of the definitive exact. I'm sure that there are several "basketbal...

**geometry**

An airplane descends 3.5 miles over a horizontal distance of 25 miles. How far did the plane actually travel?

**Math**

2 2/5 hours is 132 minutes 132*3/8 is equal to 45 3/4 minutes

**math**

(624*3)/8

**ALGEBRA 1 help**

That's correct.

**ALGEBRA**

Correction* The middle number is -5 and so the factors will have - signs rather than + signs

**ALGEBRA**

multiply the term on the left with the term on the right. In this problem, 2*2 That will give you 4. Now you need to find two numbers that will multiply to 4, and also add to equal the middle number. In this problem the middle number is 5. So, we need two numbers that multiply...

**MATH**

Any fraction is undefined when the denominator is equal to zero. In this problem the denominator is 2x-6. In order to find what value of x is needed to make the denominator zero, set it equal to x and solve. 2x-6=o 2x=6 x=3 Therefore, this fraction is undefined (or has a denom...

**math**

x+(x+250)=420 2x+250=420 x=85 85+250=335 Therefore, 335 acres of corn and 85 acres of pumpkins

**math**

335 acres of corn 85 acres of pumpkins

**math**

x+x+3x+3x=44 8x=44 x=5.5 L=3x=16.5cm W=x=5.5cm

**geometry**

9z+9=180 9z=171 z=171/9 z=19

**finance**

Company sales and profits grow at a rate of 30% per year; at the end of 4 years (t4) the growth rate drops to steady 5%. Company recently paid a dividend of $1 per share, and the required return is 20%. What is the value of one share today (t0)? assuming dividends grow at same...

**algebra**

Marlene drive 540 miles to visit friend. drive for 3 hours then stopped for gas, then drive 4 more hours stopped for lunch. how many more hours do I drive if my average speed for trip is 60 miles per hour ? How would I write an equation?

**AP Government**

Is this not what she was looking for? Sorry.

**AP Government**

House of Representatives Standing Committee Operation The House of Representatives has many types of committees.. They include standing committees, subcommittees, select committees, study committees, and advisory committees. This memo focuses on standing committees. The House ...

**MATH**

MIKE HAS 2 MATS THAT ARE IN THE SHAPE OF TRIANGLES THE SCALE FACTOR OF THE 2 TRIANGULAR MATS IS 7/9 WHAT IS THE RATIO OF THE PERIMETERS?

**Physics**

A 95 kg rowboat is initially at rest, until it is pulled toward the dock with a rope with a tension of 30.0 N. The dock is higher than the boat, and the rope makes an angle of 25° at the place where it meets the boat. What is the acceleration of the boat? 0.080 m/s2 0.29 m...

**math**

23x17 in expanded algorithm

**calculus**

does the sequence a=(2n)! / n! converge? Explain

**Statistics**

A game is played using one die. There is a$1 charge to play the game. If the die is rolled and shows a five, the player receives $6 back ( a profit of $5 and the original $1). If any other number shows, theplayer loses the original $1. What is the player's expected value?...

**Statistics**

A game is played using one die. There is a$1 charge to play the game. If the die is rolled and shows a five, the player receives $6 back ( a profit of $5 and the original $1). If any other number shows, theplayer loses the original $1. What is the player's expected value?...

**Statistics**

There are 6 batteries. Two are defective. If you pull out two batteries, what is the probability that neither are defective? Is this how you solve it? 4/6 X 3/5

**rainwater**

What would cause rain water puddle to turn black in color

**physics**

MAN WHY YOU THROWIN BALLS MAN I DONT EVEN KNOW

**calc **

Let f(3) = 0, f '(3) = 6, g(3) = 1, and g '(3) = 1/3. If h(x) = f(x)*g(x), find h '(3).

**calculus**

Choose the correct quantity to fill in the blank: Integral_______ dx = (ax2 - a2)4 + C.

**calculus**

Choose the correct quantity to fill in the blank: Integral_______ dx = (ax2 - a2)4 + C.

**Math**

Len flipped a coin 3 times and got a head each time. What are the chances he will get a tail on his next toss? Explain reasoning. would it be 50/50 because there are two sides

**Algebra Help please**

12(74y - (6+5Y - 8Z) = Please show work

**Algebra**

12(74y - (6+5Y - 8Z) = Please show work

**Algebra**

12(74y - (6+5Y - 8Z) = Please show work

**Algebra**

12(74y - (6+5Y - 8Z) = Please show work

**Math**

Mrs Sue thank you and you are the best

**Math**

Does anyone know the old formula to calculate a hourly raise from a percentage; I totally forgot. The employee makes $10.50 an hour and is receiving a 1.1% increase.

**Chemistry**

"A voltaic cell is constructed by immersing a strip of sillver metal in a 1.0 MAgNO3 solution and a strip of cadmium metal in a 1.0M Cd(NO3)2 solution. The circut is completed by a wire and a salt bridge in the usual way. a. Write the balanced overall cell reaction. b. wh...

**physics**

Outside air generally contains some water vapor (typically 1-2% by mass). Does it take more, less, or the same heat to raise the temperature of 1kg moist air than is needed to raise the temperature of 1kg dry air by the same amount?

**physics**

water 20 degrees celsius flows through a 25 mm diameter pipe at a rate of 50 liters per minute. is this laminar or turbulant flow or both?

**math**

250mg is equal to what percent of a gram or grams

**Stats**

Use this table to answer the questions. Height (in inches) Frequency 50-52 5 53-55 8 56-58 12 59-61 13 62-64 11 1. Identify the class width. 2. Identify the midpoint of the first class. 3. Identify the class boundaries of the first class. 4. Give the relative frequency for ea...

**physics**

Take the mass of the Earth to be 5.98 × 1024 kg. If the Earth’s gravitational force causes a falling 52 kg student to accelerate downward at 9.8 m/s2, determine the upward accelera- tion of the Earth during the student’s fall. Answer in units of m/s2.

**Statistics/Math- Please Help**

The company offers two types of sales: 1. Internet sales; 2. Store sales. The marketing research manager believes that the Internet sales are more than 10% higher than store sales. The null hypothesis would be: A. Pinternet–Pstore >.10 B. Pinternet–Pstore <.10 ...

**english**

Yes it affects your life. However, that is pretty broad. 1. Confidence 2. Social ability

**Statistics/Math- Please Help**

The company offers two types of sales: 1. Internet sales; 2. Store sales. The marketing research manager believes that the Internet sales are more than 10% higher than store sales. The null hypothesis would be: A. Pinternet–Pstore >.10 B. Pinternet–Pstore <.10 ...

**math**

x=6 6( 3 + 6x)= 234 (3+ 6x)= 39 6x= 36 x=6

**chemistry**

The Ka of stearic acid is 1.3 x 10^-5. what is the Kb of stearate?

**Chemistry**

What is the mass of boiling water and the mass of tub water?

**Applied statistics for business and economics**

Only 0.02% of credit card holders of a company report the loss or theft of their credit cards each month. The company has 15,000 credit cards in the city of Memphis. Use the Poisson probability tables to answer the following questions. What is the probability that during the n...

**Physics**

Block A and block B (see figure below) are forced together, compressing a spring (with spring constant k = 2220 N/m) between them 2 cm from its equilibrium length. The spring, which has negligible mass, is not fastened to either block and drops to the surface after it has expa...

**math**

u divided by 7 =3

**Physics**

Nitrogen gas is introduced into a large deflated plastic bag. No gas is allowed to escape, but as more and more nitrogen is added, the bag inflates to accommodate it. The pressure of the gas within the bag remains at 1 \rm atm and its temperature remains at room temperature (2...

**Physics**

A 1.10 kg} block of wood sits at the edge of a table, 0.790 m above the floor. A 1.10×10−2 kg} bullet moving horizontally with a speed of 725 m/s embeds itself within the block. What horizontal distance does the block cover before hitting the ground?

**Physics**

A bullet with a mass of 4.0 g and a speed of 650 m/s is fired at a block of wood with a mass of 9.7×10−2 kg. The block rests on a frictionless surface, and is thin enough that the bullet passes completely through it. Immediately after the bullet exits the block, th...

**Physics**

A 90 kg astronaut and a 1100 kg satellite are at rest relative to the space shuttle. The astronaut pushes on the satellite, giving it a speed of 0.24 m/s directly away from the shuttle. Seven-and-a-half seconds later the astronaut comes into contact with the shuttle. What was ...

**Physics**

Fairgoers ride a Ferris wheel with a radius of 5.00 {\rm m} . The wheel completes one revolution every 31.5 s What is the average speed of a rider on this Ferris wheel? If a rider accidentally drops a stuffed animal at the top of the wheel, where does it land relative to the b...

**Physics**

You shoot an arrow into the air. Two seconds later (2.00 {\rm s}) the arrow has gone straight upward to a height of 32.0 m above its launch point. What is the initial velocity and how long did it take for the arrow to reach 16.0 m above the launch point?

**Phy**

You shoot an arrow into the air. Two seconds later (2.00 {\rm s}) the arrow has gone straight upward to a height of 32.0 m above its launch point. What is the initial velocity and how long did it take for the arrow to reach 16.0 m above the launch point?

**Physics**

You shoot an arrow into the air. Two seconds later (2.00 {\rm s}) the arrow has gone straight upward to a height of 32.0 m above its launch point. What is the initial velocity and how long did it take for the arrow to reach 16.0 m above the launch point?

**american government**

I am having trouble finding the answer to this same exact question. The word "legitimate" is what deters me from answering A without hesitation.

**Chem.**

If 229 g of Pb(NO3)2 and 190 mL of 1.68 M aqueous NaI are reacted stoichiometrically according to the balanced equation, how many grams of Pb(NO3)2 remain? Round your answer to 3 significant figures. Pb(NO3)2(aq) + 2NaI(aq) → PbI2(s) + 2NaNO3(aq)

**Math**

In one three day weekend, the daily high temperature had a median value of 73. The mean temperature was 74.33 and the range of temperatures was 14. What were the three weekend daily high temperatures?

**pre- algebra(MATH)**

7(2p+1)=14P+7

**4th Grade Math**

26x22

**Algebra**

A bag of M&Ms contains 12 red, 11 yellow, 5 green, 6 orange, 5 blue, and 16 brown candies. What is the probability that if you choose 2 M&Ms from the bag (one after the other) without looking, you will choose 2 yellow ones?

**busniess**

What are the four functions of management?

**science**

salt and chlorine