Saturday

April 25, 2015

April 25, 2015

Total # Posts: 1,842

**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.
*October 10, 2013*

**chemistry**

thank you; answer is 0.4177 or 4.2
*October 6, 2013*

**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 ...
*October 6, 2013*

**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...
*October 5, 2013*

**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 =)
*October 2, 2013*

**Math**

How would you solve this inequality -3(n+8)<-17-3n
*September 30, 2013*

**Math**

How you solve this in inequality form? Six less than or equal to the sum of 4 and -2x.
*September 25, 2013*

**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 ...
*September 25, 2013*

**Spanish 1**

No me gusta la lechuga porque no es _____. A. sabrosa B. sabroso C. malo D. horrible D?
*September 20, 2013*

**Science**

For the second question the answer is feedback
*September 20, 2013*

**PSY-317**

How does CUPID help normal Aging?
*September 14, 2013*

**PSY-317**

What specifically is the acronym CUPID?
*September 14, 2013*

**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?
*September 10, 2013*

**ENG**

Discuss the primary characteristics of age-irrelevant theories and age-change theories. What are the fundamental principles of both types of theories?
*September 5, 2013*

**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,
*August 29, 2013*

**science**

How is a parent generation of a fern different from the generation that comes before or after it?
*August 10, 2013*

**physics**

9.8/8.4 answer: 1.16666
*July 16, 2013*

**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)?
*July 9, 2013*

**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.
*July 9, 2013*

**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
*July 9, 2013*

**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 ...
*July 8, 2013*

**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
*July 8, 2013*

**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
*July 8, 2013*

**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.)
*July 7, 2013*

**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 ...
*July 7, 2013*

**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 ...
*July 7, 2013*

**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 ...
*July 5, 2013*

**English**

Thank you so much! I found the two other examples for Huck and now I just have 2 of Tom's examples!
*July 5, 2013*

**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 ...
*July 5, 2013*

**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.
*July 2, 2013*

**English**

What conflicts are in "Son" by John Updike? External and internal?
*June 29, 2013*

**summery**

how do u write a summery
*June 24, 2013*

**summery**

thanks alot ms.Sue
*June 23, 2013*

**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.
*June 23, 2013*

**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 ...
*June 15, 2013*

**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)
*June 3, 2013*

**science**

How many moles S are required to prepare 800 liters of SO2 gas in a synthesis reaction?
*May 29, 2013*

**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:
*May 28, 2013*

**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...
*May 23, 2013*

**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...
*May 22, 2013*

**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?
*May 16, 2013*

**math**

If a pencil costs 300% more than an eraser and the eraser costs 25 cents, what is the cost of the pencil?
*May 9, 2013*

**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?
*May 7, 2013*

**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
*May 7, 2013*

**Hospitality**

I was more toward the true as well but was confused. Thanks Ms. SUe!!!
*May 7, 2013*

**Hospitality**

A key difference between Social and Corporate event planner work is the days of the week that are usually worked. True or False
*May 7, 2013*

**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 ...
*May 6, 2013*

**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?
*April 28, 2013*

**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
*April 17, 2013*

**math**

oh thanks
*April 16, 2013*

**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
*April 16, 2013*

**physical science**

How much energy is stored in a 9V battery rated at 10 A hour?
*April 12, 2013*

**Chemistry**

An unknown amount of gas occupies 30.0 L at 2.1 ATM and 298K. How many moles does the sample contain? What is the mass if the gas is helium? What is the mass if the gas is argon?
*April 10, 2013*

**Chemistry**

what volume does 3.01x 10^21 molecules of N2 occupy at STP
*April 10, 2013*

**English (Check Please)**

1. urgency. 2. the life of city dwellers 3. his awe at the starry sky above the camp
*April 8, 2013*

**math**

Multiply both sides by 1/2 (1/2)(2y) = (1/2)(4/3) y = 4/6 y = 2/3
*April 6, 2013*

**algebra**

I think this problem is really (3x - 2) / 3x = 4 / 3 [cross multiply] 3(3x - 2) = 4 * 3x 9x - 6 = 12x 9x -6 + 6 = 12x +'6 9x = 12x + 6 9x - 12x = 12x + 6 - 12x -3x = 6 x = -2
*April 6, 2013*

**grade 6 honors math**

Thanks. Saiko
*April 5, 2013*

**grade 6 honors math**

Of 150 sixth graders choosing electives for next year, 50 signed up for theater, 65 signed up for art and 70 signed up for band. Some students did not choose an elective. Represent this information using Venn Diagrams.
*April 5, 2013*

**math**

The question does not make sense. Did you copy it correctly?
*April 5, 2013*

**Algaebra**

First, draw a picture to represent the pool with walk around it. Let x = width of pool, then x + 5 = length of pool x+ 9 = length of walk, and x+4 = width of walk Area of pool = x(x +5) Area of walk and pool =(x + 9)(x + 4) Area of pool + 156 = Area of walk and pool x(x + 5...
*April 5, 2013*

**calc**

find the limit:x->3 ln(x/3)/x^2-9
*March 31, 2013*

**Math-Population Word Problem**

Ohh my gosh, thank you. I was just confused about "a" but the extra information cant hurt. Thank you so much.
*March 26, 2013*

**Math-Population Word Problem**

thank you very much, it all makes sense now except for a. could you explain how you get that number. I plugged it into a calculator and it is correct but i just don't understand how it works.
*March 26, 2013*

**Math-Population Word Problem**

The population of rabbits in a national forest is modeled by the formula P=8,600+650 ln(t+1) where "t" is the number of years from the present. a)How many rabbits are now in the forest b)Estimate when it will take for the number of rabbits to reach 12,000? c)Estimate...
*March 26, 2013*

**Writing**

I rock
*March 20, 2013*

**English**

In which sentence is the underlined word a past participle? Melted rock can explode or flow from different types of volcanoes. Having been warned of a possible eruption, the people left their town at the base of the volcano. Flowing lava from a volcano is an amazing sight to ...
*March 20, 2013*

**physical science**

A 150-L water heater is rated at 8 kW .If 20 percent of its heat escapes, how long does the heater take to raise the temperature of 150 L of water from 10C to 60C?
*March 16, 2013*

**Chem**

When 20.0 g C2H6 and 60.0 g O2 react to form CO2 and H2O, how many grams of water are formed?
*March 14, 2013*

**Calculus**

An ocean oil well is leaking oil into the ocean at a rate of 1 m3/hr resulting in an oil slick in the form of a circular disk (like a quarter or dime). If the slick remains in the shape of a disk with a constant thickness of 1/100 m as the disk expands, determine the rate at ...
*March 6, 2013*

**Calculus**

An ocean oil well is leaking oil into the ocean at a rate of 1 m3/hr resulting in an oil slick in the form of a circular disk (like a quarter or dime). If the slick remains in the shape of a disk with a constant thickness of 1/100 m as the disk expands, determine the rate at ...
*March 6, 2013*

**Calculus**

An ocean oil well is leaking oil into the ocean at a rate of 1 m3/hr resulting in an oil slick in the form of a circular disk (like a quarter or dime). If the slick remains in the shape of a disk with a constant thickness of 1/100 m as the disk expands, determine the rate at ...
*March 6, 2013*

**math**

what is 21/2 x 1/2
*March 4, 2013*

**physical**

A 70-kg man and a 50-kg woman are in a 60-kg boat when its motor fails. The man dives into the water with a horizontal speed of 3m/s in order to swim ashore. If he changes his mind, can he swim back to the boat if his swimming speed is 1m/s? If not, can the woman change the ...
*March 2, 2013*

**physical**

When 1 g of gasoline is burned in an engine, about 48 kJ of heat is produced. How much mass is lost in the process? Do you think this mass change could directly measured
*March 2, 2013*

**Science**

If there was zero change in Earth’s eccentricity, how might that affect the possibility of an ice age?
*March 1, 2013*

**physics**

. A 70-kg man and a 50-kg woman are in a 60-kg boat when its motor fails. The man dives into the water with a horizontal speed of 3m/s in order to swim ashore. If he changes his mind, can he swim back to the boat if his swimming speed is 1m/s? If not, can the woman change the ...
*February 28, 2013*

**physics**

I used the equations of motion for constant acceleration (The object is assumed to fall with the acceleration due to gravity which I took to be 10 m/s^2) Equations of motion: V^2=U^2 + 2*a*s V=U+at Note: when objects rebounds, acceleration = - 10m/s^2 since the latter is a ...
*February 25, 2013*

**physics**

I worked it out and got 4.8N
*February 25, 2013*

**science**

The acceleration of gravity on the surface of Venus is 8.9m/s^2. Would a ball thrown upward on Venus return to the ground sooner or later than a ball thrown upward with the same speed on the earth?
*February 22, 2013*

**science**

A force of 20 N gives an object an acceleration of 5m/s^2. (a) What force would be needed to give the same object an acceleration of 1m/s^2? (b) What force be needed to give it an acceleration of 10m/s^2?
*February 22, 2013*

**math**

0.5, 3/5, 1 3/4, 0.9 in order from least to greatest
*February 21, 2013*

**chemistry**

How do you find q in q=mC delta t without the mass
*February 21, 2013*

**trigometry**

1. A 16-foot ladder on ground level is leaning against a house. If the base of the ladder is placed 5.0 feet from the house, what is the angle formed at the top of the ladder? A. 24° B. 18° C. 72° D. 20° please help I don't know how to do this
*February 20, 2013*

**Calculus**

calculate the derivative (2,5) (2.1,5.3) h'(2) if h(x)=(f(x))^3 k'(2) if k(x)=f(x))^-1 g'(5) if g(x)=f^-1(x)
*February 18, 2013*

**Physics**

You run a race with your friend. At first you each have the same kinetic energy, but then you find that she is beating you. When you increase your speed by 21.0%, you are running at the same speed she is. If your mass is 77.0 kg, what is her mass?
*February 10, 2013*

**calc**

agree thank you steve
*February 5, 2013*

**calc**

find the derivatives of the given functions. g(t)=sqrt t(1+t)/t^2
*February 5, 2013*

**Math PLEASE HELP FAST!!!!**

c
*January 30, 2013*

**history**

ms.sue,thank you for the answer, but i have to discribe the things Juan Ponce De Leon discovered in his journey to the new land! My homework question is, discribe the things he discovered in his journey to the new world like plants,animals,people and land???
*January 29, 2013*

**history**

what did Juan Ponce De Leon discover in his journey to the new world: plants,animals,people,land?
*January 29, 2013*

**math**

If a hiker walks trail B (1 mile in length) at 6 mph and trail C (3 mils in length) at 2 mph, what is the hiker's overall average speed, in mph, for hiking on the two trails?
*January 28, 2013*

**Math on time**

thank
*January 27, 2013*

**Math on time**

Trying to understand how to solve this? Paige spends 1 hour on her homework. She spends equal amounts of time on all subjects. If Paige spends ½ hour on Spanish, how many subjects does she study?
*January 27, 2013*

**Math**

The area of certain rectangle is 288 yd. the perimeter is 68 yd. if you double the length and width, what will be the area and perimeter of the new rectangle.
*January 23, 2013*

**Math**

A plane leaves Boston at 10 am (Boston time) and flies non-stop to LA, 2700 miles away, at 580 miles per hour (mph). On the same route, a second plane is flying non-stop from LA to Boston at 620 mph. If the second plane lease LA at 10 am (LA time), how many miles from LA will ...
*January 22, 2013*

**English/Essay**

Could someone tell me if I have done my essay the right way? Please its due Monday?? "The internet is a much easier resource for students than a library” The first reason the internet is a much easier resource for students than a library, you can Find specific ...
*January 12, 2013*

**9th grade algebra**

25.4
*January 10, 2013*