Saturday

April 19, 2014

April 19, 2014

Total # Posts: 1,682

**chemistry**

in the reaction Al2O3= Al+O2 if 742.5 grams of Al2O3 are used how many mols of Al will be produced?

**Soc**

Is it important to distinguish between heterogeneity within a group and differences across several groups?

**Calculas**

The profit obtained when x barbecues are sold is P(x) = 100 x − 3x^2 (lnx) dollars . Find the marginal profit when 4 are sold.

**Chemistry**

a balloon has a volume of 2.0 L at room temperature (27 degrees celsius). at what temperature would the balloon have a volume of 2.0L?

**math**

hi

**homonyms**

What is the homonym for do?

**Physics**

A 5.00-g bullet is fired into a 500-g block of wood suspended as a ballistic pendulum. the combined mass swings up to a height of 8.00 cm. What was the magnitude of the momentum of the combined mass immediately after the collision? Answer a. 0.394 kg·m/s b. 0.632 kg&mi...

**Phy**

A 5.00-g bullet is fired into a 500-g block of wood suspended as a ballistic pendulum. the combined mass swings up to a height of 8.00 cm. What was the magnitude of the momentum of the combined mass immediately after the collision? Answer a. 0.394 kg·m/s b. 0.632 kg&mi...

**Physics**

A 5.00-g bullet is fired into a 500-g block of wood suspended as a ballistic pendulum. the combined mass swings up to a height of 8.00 cm. What was the magnitude of the momentum of the combined mass immediately after the collision?

**Math**

Rey is playing a game. For every 2 steps forward he takes, he takes one step back. Complete the function table to show Rey's steps. Then write an equation for the function table. F 2-4-6-8-10 B _ _ _ _ _

**Math- NOT CALCULUS**

The hourly profit ($P) obtained from operating a fleet of n taxis is given by P=-2n^2+84n-45 What is the profit if 20 taxis are on the road? What is the maximum hourly profit? What number of taxis gives the max hourly profit? How much money is lost per hour if no taxis are on ...

**Math **

The hourly profit ($P) obtained from operating a fleet of n taxis is given by P=-2n^2+84n-45 What is the profit if 20 taxis are on the road? What is the maximum hourly profit? What number of taxis gives the max hourly profit? How much money is lost per hour if no taxis are on ...

**physics**

A block rests on a horizontal frictionless surface. A string is attached to the block, and is pulled with a force of 60.0 N at an angle θ above the horizontal. After the block is pulled through a distance of 2.00 m, its speed is 2.70 m/s, and 43.0 J of work has been done ...

**physics**

A 0.349 kg particle slides around a horizontal track. The track has a smooth, vertical outer wall forming a circle with a radius of 1.68 m. The particle is given an initial speed of 8.66 m/s. After one revolution, its speed has dropped to 6.05 m/s because of friction with the ...

**physics**

the rotation of earth is a period of 86164 seconds. the earth has a radius of 6380 km. how fast would you be moving due to earths rotation at the equator? also how fast would you be moving at a latitude of 27 degrees north of the equator? also calculate the centripetal acceler...

**physics**

if I weigh 177 lb on a stationary scale and stand on that same scale inside an elevator going up at an acceleration of 12 ft/s^2 the scale will read 238lbs. if the elevator, still moving upwards, decelerates at the rate of 32 ft/s^2 what will the scale read?

**physics**

if I weigh 177 lb on a stationary scale and stand on that same scale inside an elevator going up at an acceleration of 12 ft/s^2 what will the ending scale reading be?

**Math**

Kamal bought 7 packs of paper clips for a project. Then he bought 8 more packs. There are 25 paper clips in each pack. How many paper clips did he buy?

**Physics**

If the force between two charges decreases by a factor of 100 because the charges are moved further apart

**Physics**

What is the minimum uncertainty in the velocity of an electron that is known to be somewhere between 0.050 nm and 0.10 nm from a proton

**Physics**

A car is moving down a street at 67 km/h. A child suddenly runs into the street. If it takes the driver 1.26 s to react and apply the brakes, how many meters will the car have moved before it begins to slow down?

**Physics**

) What is the minimum uncertainty in the velocity of an electron that is known to be somewhere between 0.050 nm and 0.10 nm from a proton?

**math**

Shelby is organizing her 30 ribbons she won for competitions. She has twice as many first- place ribbons as she does second place ribbons. How many first-place ribbons does Shelby have?

**Physics**

A metal with a work function of 2.40 eV is illuminated by a beam of monochromatic light. If the stopping potential is 2.5V, what is the wavelength of the light?

**Macroecon**

What are the assumptions that could be made to simplify the study of the the after affects of Katrina on Louisiana's economy. 1. "Track the total net worth of the output produced by the state prior to the hurricane and after the hurricane." 2." Focus on jus...

**Math Check 2 ?s quick**

The angle of elevation to the top of a 20-story skyscraper is measured to be 10 from a point on the ground 1,500 feet from the building. Find the height of the skyscraper in feet, correct to three decimal places. (Points : 5) 260.47 73.86 972.54 264.49 <-- Let f(x) = sin-1...

**Chemistry**

-1368 kJ

**problem math**

laptop $1090.00 with 20% off and then another 15% taken off

**data management grade 12**

eight burglary suspects, two of whom are guilty, are placed in a line up. suppose that a witness is asked to identify the two guilty suspects but is unable to make a positive identification with any degree of confidence. if the witness feels compelled to identify two suspects,...

**Math**

If the L.A. Dodgers win about 21 games a month, about how many games would they win after three months?

**econ**

a new sports store was selling 50 soccer balls for $20 each. recently the store changed the price to $30 each and sold only 30 soccer balls per day.what is the approximate price elasticity of demand for soccer balls?

**econ**

french horns and trumpets are substitutes in production. if the price of trumpets rises how will this affect equilibrium in the market for french horns?

**Math**

Find the area between x = 9.5 and x = 23 under a normal distribution curve with μ = 20 and σ = 4 .

**Math**

Find the area between x = 9.5 and x = 23 under a normal distribution curve with μ = 20 and σ = 4 .

**Physics**

A 0.60kg basketball is dunked vertically downward so that it leaves the [layer's hand at 8m/s. Assume it is released when the bottom of the ball is at the rim (3.05 meters off the ground). a). find acceleration of the ball once it leaves the player's hand b). how ling ...

**Physics**

A 0.60kg basketball is dunked vertically downward so that it leaves the [layer's hand at 8m/s. Assume it is released when the bottom of the ball is at the rim (3.05 meters off the ground). a). find acceleration of the ball once it leaves the player's hand b). how ling ...

**Physics**

I was confused there too cause the problem didn't tell me the displacement so I don't know how to find acceleration.

**Physics**

A juggler tosses a 0.4kg ball straight up at 8m/s, and then catches it at the same height . a. determine the acceleration on the way up and down b. determine the total amount of time spent in the air by the ball. (hint: you know the displacement) c.determine the velocity of th...

**Physics**

A juggler tosses a 0.4kg ball straight up at 8m/s, and then catches it at the same height . a. determine the acceleration on the way up and down b. determine the total amount of time spent in the air by the ball. (hint: you know the displacement) c.determine the velocity of th...

**Chemistry**

thats the part I cannot get.. how to balance them

**Chemistry**

Complete and balance the precipitation reactions. Include physical states in your equations. Ba(NO3)2(aq) + CuSO4 (aq)---> K3PO4(aq)+MgCl2 (aq)---->

**Algebra 1**

OH Thank you

**Algebra 1**

Which statement is always a correct conclusion about the values x and y in the function y=x-3? a. The value of x is always 3 less than the value of y b. The value of y is always less than the value of x c. When the value of x is positive, the value of y is also positive d. As ...

**Chemistry**

Among the following, which element has the lowest ionization energy? A. Na B. Cl C. Cs D. I

**physics**

bill and bob are both on the roof of a building 176.4 m high. bill drops a penny straight down at the same instant, bob throws a dime vertically upwards. the dime is thrown over the age when it comes back down it misses the roof and follows the penny to the street below. how f...

**physics**

bill and bob are both on the roof of a building 176.4 m high. bill drops a penny straight down at the same instant, bob throws a dime vertically upwards. the dime is thrown over the age when it comes back down it misses the roof and follows the penny to the street below. how f...

**Algebra 1**

I DID IT NEVER MIND

**math**

A log cabin in the shape of a rectangular prism is modeled using a scale of 1 cm : 0.6 m. If the dimensions of the model are 34 × 20 × 6 centimeters, what is the volume of the actual log cabin?

**Math Explanation**

Carl needs to estimate the quotient 547/92=. Explain how Carl could use compatible numbers to make a reasonable estimate.

**Chemistry**

A metal foil has a threshold frequency of 5.45× 1014 Hz. Which of the colors of visible light have enough energy to eject electrons from this metal.

**Chemistry**

The tripeptide is T-A-K 1. What is the overall charge of the tripeptide below pH 1.0? 2. What is the overall charge of the tripeptide at pH 12? 3. What type of intermolecular attractions could the side chains of the amino acids make with the solvent (water) at pH 7.4? (Note th...

**Chemistry **

1. What is the overall charge of the tripeptide below pH 1.0? 2. What is the overall charge of the tripeptide at pH 12? 3. What type of intermolecular attractions could the side chains of the amino acids make with the solvent (water) at pH 7.4? (Note that these are attractions...

**Science**

Briefly describe a desalination process. What can make desalination expensive? Name 2 renewable energy sources that can be used in desalination. Help me please and thankyou =)

**Math**

How would you solve this inequality -3(n+8)<-17-3n

**Math**

How you solve this in inequality form? Six less than or equal to the sum of 4 and -2x.

**Math**

How would you solve this word problem in one variable inequality form? The maximum safe water temperature in a spa is 104 degrees. The water temperature in bill's spa is 102 degrees. The temperature is increased by, d, degrees. Write and solve an inequality to show the val...

**Spanish 1**

No me gusta la lechuga porque no es _____. A. sabrosa B. sabroso C. malo D. horrible D?

**PSY-317**

How does CUPID help normal Aging?

**PSY-317**

What specifically is the acronym CUPID?

**Spanish 1**

Which expression means the same as this one: ¿Son las siete menos veinte? A. Son las siete y veinte. B. Son las ocho y veinte. C. Son las seis y cuarenta. D. Son las siete y cuarenta. B?

**ENG**

Discuss the primary characteristics of age-irrelevant theories and age-change theories. What are the fundamental principles of both types of theories?

**EDU-352**

What are five to seven movements in the field of educational technology that you believe the K-12 large, urban school district should pay attention to. Thank You,

**science**

How is a parent generation of a fern different from the generation that comes before or after it?

**physics**

9.8/8.4 answer: 1.16666

**physics[**

Consider a spacecraft whose engines cause it to accelerate at 5.0 m/s2. (a) What would be the spacecraft’s acceleration at a later time if half its fuel has been used up? (b) What assumptions have you made in order to answer (a)?

**physics**

A 78-kg parachutist, in the first few seconds of her jump, accelerates at a rate of 7.4 m/s2 [down]. Calculate the force she experiences due to air resistance.

**physics**

A dolphin experiences a force of 320 N [up] when it jumps out of the water. The acceleration of the dolphin is 2.6 m/s 2 [up]. (a) Calculate the mass of the dolphin. (b) What would be the acceleration of the dolphin if it had the same strength but half the mass

**physics**

The Moon has a mass of 7.35 1022 kg and its equatorial radius is 1.74 106 m. Earth’s mass is 5.97 1024 kg and its equatorial radius is 6.38 106 m. (a) Calculate the magnitude of the gravitational force exerted by i) the Moon on a fully suited 100-kg as...

**physics**

Calculate the time required for an astronaut to free-fall 50 m on the Moon. Please show and explain steps answer is 7.9s

**physics**

A 7.50-kg turkey standing at the top of Ishpatina Ridge, at 693 m the highest point in Ontario, weighs 73.5 N [down]. Calculate the magnitude of the gravitational field strength at this location. answer is 9.8N/Kg

**physics**

At the 2004 Olympic Games in Athens, Dwight Phillips won the gold medal in men’s long jump with a jump of 8.59 m. If the angle of his jump was 23°, what was his takeoff speed? (Treat the jumper as an object; ignore that his legs are in front of him when he lands.)

**physics**

a football is thrown to a moving receiver .the football leaves the quarterback's hands 1.75m above the ground with a velocity of 17.0m/s[25deg]if the receiver starts 12.0m away from the quarterback along the line of flight of the ball when is is thrown , what constant velo...

**physics**

a football is thrown to a moving receiver .the football leaves the quarterback's hands 1.75m above the ground with a velocity of 17.0m/s[25deg]if the receiver starts 12.0m away from the quarterback along the line of flight of the ball when is is thrown , what constant velo...

**English**

In Adventures of Huckleberry Finn, Jim and Huck both decide that their relationships with their friends and loved ones are more important than their freedom, lives, and in Huck's case, his soul. Do you think modern heroes can make the same kinds of choices? In one paragrap...

**English**

Thank you so much! I found the two other examples for Huck and now I just have 2 of Tom's examples!

**English**

Mark Twain used the characters his novel "Adventures of Huckleberry Finn" to show his contempt for the romantic style of literature. List three examples from the text that support the label for each character. Huck Finn- Realism Tom Sawyer- Romanticism This is suppos...

**Physics**

A solid sphere rolls without slipping from rest down a plane at 4.00m long inclined at an angle of 42 degrees with respect to the horizontal as shown in the figure below. Determine the speed at the bottom of the incline.

**English**

What conflicts are in "Son" by John Updike? External and internal?

**summery**

how do u write a summery

**summery**

thanks alot ms.Sue

**summery**

my teacher told me to find something funny about brooklyn. i spent 2 1/2 hours in looking for it but couldnt find anything. plssssssssssss u must help me im getting tierd of looking at the computer screen.

**physics**

orange light (lambda=630nm) hits diffraction grating which has a line spacing of (mu)m. The interference pattern is seen on a screen that is 4.0m away. what is the distance between the central bright spot and the first order bright spot on the screen. (sorry I don't have s...

**math**

27

**Chemistry**

A) Determine the pH of a 0.98 x 10^-2 mol L solution of hydrocyanic acid (HCN) Ka = 4.0 x 10^-10 B) What is the pH of a 0.243mol L solution of methylamine? (pKb for CH3NH2 = 3.30) C) determine the pH of a buffer solution of Na2CO3 (pkb = 3.68, 0.125 M) and NaHco3 (0.35M)

**science**

How many moles S are required to prepare 800 liters of SO2 gas in a synthesis reaction?

**Physics**

Four resistors 2.1Ω, 3.2 Ω, 4.3 Ω, and 5.4 Ω are connected in a series to a 9 V battery. The effective resistance in the circuit is:

**math**

One train left the station and traveled toward its destination at a speed of 65 miles per hour. Later, another train left the station traveling in the opposite direction of the first train, it was going at a speed of 75 miles per hour. After the first train had traveled for 14...

**American History**

Following the Spanish -American War. and espeacially in regard to American occupation of the philippines, most anti-imperialists argued that... A. The occupation would lead to unhealthy racial-mixing. B. Because all war was immoral, the fruits of war were tainted. C.installing...

**Physics**

If the EMF produced in a wire is 0.88 volts and the wire moves perpendicular to a magnetic field of strength 0.075 newtons/amp·meter at a speed of 4.20 meters/second, what is the length of the wire in the magnetic field?

**math**

If a pencil costs 300% more than an eraser and the eraser costs 25 cents, what is the cost of the pencil?

**Hospitality**

According to the Farm to Table speaker's, local Farmer's Market's are a key source of produce and other food products for them weekly True False I say, true because food is what farmers produce?

**Hospitality**

A key benefit identified as being part of the Food Service industry that Compass is not having to work nights and weekends regulary. True of False. I say True, becaue when you don't work during nights at food industries?? what do you think

**Hospitality**

I was more toward the true as well but was confused. Thanks Ms. SUe!!!

**Hospitality**

A key difference between Social and Corporate event planner work is the days of the week that are usually worked. True or False

**history**

Which of the following is true with regards to The Navigation Acts by the eighteenth century? A- In general, the colonist despised the acts and smuggling was rampant. B- The Navigation act of 1696 abolished the American customs service. C- The colonists became used to buying a...

**math**

A standard die is rolled three times. What is the probability that a prime number is rolled on exactly one of the three rolls?

**Algebra**

Please Help! How much money, invested at an interest rate of r% per year compounded continuously, will amount to A dollars after t years? A = 15,500, r = 5.4, t = 5

**math**

oh thanks

**math**

1. Which set represents a Pythagorean triple? A:2,5,6 B:6,8,10 C:8,8,128 D:8,10,256 2. What is the hypotenuse of a right triangle if the legs are each 20 inches long? Round to the nearest whole number. A:28 B:29 C:30 D:31 I think the first ones B, and the second one is C

**physical science**

How much energy is stored in a 9V battery rated at 10 A hour?

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