Tuesday
October 21, 2014

Posts by dallas


Total # Posts: 48

physics
A satellite of mass 205 kg is launched from a site on Earth's equator into an orbit at 200 km above the surface of Earth. (a) Assuming a circular orbit, what is the orbital period of this satellite? s (b) What is the satellite's speed in its orbit? m/s (c) What is the ...
September 27, 2014

eviromental science
Using two or three well-developed paragraphs, explain how temperature and precipitation determine which plants grow within an area and give an example.
March 27, 2014

Computers
Hi, Am I on the right track? Reading for an hour now..and wanted to check my answers.. Which modem uses the same medium used to transmit video signals" My answer: C. Cable ADSL BRI DiGITAL '2. Which is the fastest wireless standard? My answer: 802.11G 802.11b WAP WI-...
October 6, 2013

Computers
which of the following types of bitmap graphics is most commonly used on the world wide web? My answer JPEG B. BMP C. PICT D. GIF I'm I on the right track?
October 5, 2013

computer science
The part of a presentation allows me to add character data is Frames. B. Animation C. Text Boxes D. Video Areas
September 22, 2013

Physics
When two tuning forks are stuck simultaneously, 3 beats per second are heard. The frequency of one fork is 510 Hz. A piece of wax is placed on the 510 Hz fork to lower its frequency slightly. If the beat frequency is increased, what is the correct frequency for the second fork...
May 15, 2013

Physics
Having landed on a newly discovered planet, an astronaut sets up a simple pendulum of length 1.29 m and finds that it makes 407 complete oscillations in 698 s. The amplitude of the oscillations is very small compared to the pendulum’s length. What is the gravitational ...
May 6, 2013

Physics
At an outdoor market, a bunch of bananas is set into oscillatory motion with an amplitude of 30.0781 cm on a spring with a spring constant of 15.7711 N/m. The mass of the bananas is 69.6297 kg. What is the speed of the bananas? Answer in units of m/s
May 6, 2013

Physics
A 43 g ice cube at 0 C is placed in 882 g of water at 81 C. What is the final temperature of the mixture? The specific heat of water is 4186 J/kg · C and its latent heat of fusion is 3.33 × 105 J/kg . Answer in units of C
April 23, 2013

Physics
A constant torque of 22.9 N·m is applied to a grindstone whose moment of inertia is 0.168 kg·m2. Using energy principles, and neglecting friction, find the angular speed after the grindstone has made 17.1 rev, assuming it started from rest. Answer in units of rev/s
April 2, 2013

Physics
Okay so i'm having a little trouble explaining the answer to a phys lab question concerning rolling friction: Assuming that f = µN , show that the coefficient of (rolling) friction for the car moving down the inclined plane with a constant speed is given by µ...
March 20, 2013

Physics
Okay so i'm having a little trouble explaining the answer to a phys lab question concerning rolling friction: Assuming that f = µN , show that the coefficient of (rolling) friction for the car moving down the inclined plane with a constant speed is given by µ...
March 19, 2013

Physics
Okay so i'm having a little trouble explaining the answer to a phys lab question concerning rolling friction: Assuming that f = µN , show that the coefficient of (rolling) friction for the car moving down the inclined plane with a constant speed is given by µ...
March 19, 2013

Physics
At t = 0, a wheel rotating about a fixed axis at a constant angular deceleration of 0.37 rad/s2 has an angular velocity of 0.5 rad/s and an angular position of 8.5 rad. What is the angular position of the wheel after 2 s? Answer in units of rad
March 5, 2013

science
if a sample of rock starts out with 32 atoms of carbon-14 how much carbon-14 would be left after 5,700 years
February 28, 2013

Physics
High-speed stroboscopic photographs show that the head of a 197 g golf club is traveling at 36.8 m/s just before it strikes a 45.9 g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 25.9 m/s. Find the speed of the golf ball ...
February 26, 2013

Physics
When a rattlesnake strikes, its head accelerates from rest to a speed of 25 m/s in 0.44 seconds. Assume for simplicity that the only moving part of the snake is its head of mass 100 g. How much (average) power does the rattlesnake need to accelerate its head that fast? Answer ...
February 20, 2013

Physics
A car is traveling at 66.9 mi/h on a horizontal highway. The acceleration of gravity is 9.8 m/s2. If the coefficient of friction between road and tires on a rainy day is 0.13, what is the minimum distance in which the car will stop? (1 mi = 1.609) Answer in units of m
February 19, 2013

Physics
A person can jump a maximum horizontal distance (by using a 45 degree projectile angle) of 3 m on Earth. The acceleration of gravity is 9.8 m/s2. What would be his maximum range on the Moon, where the free-fall acceleration is g/6 ? Answer in units of m
February 7, 2013

Physics
A bee flies to a flower 549 m due south of its hive. The bee’s speed in still air is 0.58 m/s, and there is a wind blowing toward the south at 0.18 m/s. How long will it take the bee to travel to the flower and back to the hive? Answer in units of s
February 6, 2013

Physics
As it passes over Grand Bahama Island, the eye of a hurricane is moving in a direction 25 degrees north of west with a speed of 97 km/h. Three hours later, it shifts due north, and its speed slows to 79 km/h. How far from Grand Bahama is the eye 4.50 h after it passes ...
February 5, 2013

englis
What is the simple predicate in this sentence: Two children are wandering in the woods
September 5, 2012

chemistry
If the atmosphere can support a column of mercury 760 mm high at sea level, what hright of a hypothetical liquid whose density is 1.40 times the density of mercy could be supported?
June 20, 2012

Social Studies
Point of view on slavery in the North and South North: The North didnt want slavery because they thought it was wrong to treat people different from others. What should I put for South?
March 8, 2012

History
What is the name of the widest waterfall in the world located along the Cambodian border with Laos?
March 8, 2012

History
Both Meriwether Lewis and William Clark hailed from what state?
March 8, 2012

Physical Science
true or false in an atom, negatively charged electrons surround a positively charged nucleus
May 9, 2011

algebra
2.) distance = time × speed Let rowing speed in still water be x, current in river be y Downstream, speed is his natural rowing speed plus the current: 24 = 6(x + y) Upstream, speed is natural rowing speed minus current: 18 = 6(x - y) or 4 = x + y 3 = x - y Add 7 = 2 x x...
February 16, 2011

physics
if u measured all the energy related to motion, and all the stored energy in the particles of a substance, you would be measuring?
September 15, 2010

10th grade
i need an interesting topic for a tenth grade informative essay
April 19, 2010

english
the meteorologist
April 19, 2010

Geometry
It doesn't say you can make diagonal moves which is why I'm confused
September 7, 2009

Geometry
With exacty seven horizontal or vertical jumps, remove all seven red checkers leaving the single black checker. There's 8 pieces on a grid, the black is in A1 and and reds are in A2 A3 A4 B1 B2 B3 B4.
September 7, 2009

world of religion
need help doing the eastern religion elements matrix appendix G.
August 10, 2008

Reseach paper
I'm also doing the same course right now and I searched for hours on that ridiculous website for the answers and could not find them. So, I searched thru my book for the answers and thought I had them but when I submitted my exam I got a brutal 35. On my graded report my ...
June 21, 2008

Physics
Explain how the photoelectric effect is used to open automatic dooes when someone approaches.
April 1, 2008

Physics
Why does light striking a metal surface eject only electrons, not protons?
April 1, 2008

Physics
If a beam of red light and a beam of blue light have exactly the same energy, which beam contains the greater number of photons?
April 1, 2008

Physics
The frequency of violet light is about twice that of red light. How does the energy of a violet photon compare with the energy of a red photon?
April 1, 2008

Physics
What does it mean to say that something is quantized?
April 1, 2008

accounting
which of the following entries will properly close the Revenue account?
February 13, 2008

Social Studies- (Last minute Help please)
Yeah, I did think of that, I might try those. Thanks. Any more ideas peoples?
September 23, 2007

Social Studies- (Last minute Help please)
Hey. I have a social studies project due tomorrow morning, its 840 pm. It's about Prehistory in Pop Culture. Using things from prehistoric time in modern day. I need some ideas to put on the poster. Besides Geico Cavemen ad and Fruity Pebbles.
September 23, 2007

Social Studies (communism, debating, Joseph Stalin
Hi, Next week stars a big debate on the YALTA CONFERENCE which was right before WWII ended. I want to know if someone could give me some good pointers and tips to defend my part as Joseph Stalin and his communism country. These sites have a lot of good information about Stalin...
May 3, 2007

Reading/Writing
I have been told to write a letter to a character in this story as one of the characters ("The True Confessions of Charlotte Doyle" by Avi), anyone have any tips to really GET into the character and make the letter emotional and yet still into the story? Thank you ...
April 10, 2007

SS Statistics
Hello. Does anyone have any statistic graphs of the Chinese and or Mexican Immigrants? Thx, Dallas Check the graphs at the bottom of the article. http://www.uagrad.org/Alumnus/im/
March 9, 2007

Social Studies
Why did the Irish, Chinese, and Mexican immigrate? I went to http://www.google.com and entered irish immigrate us and got these results: http://www.google.com/search?q=irish+immigrate+us&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7SUNA You can do...
March 7, 2007

Social Studies
How did the Spanish-American War change the role of the United States in the world? Im stuck.... http://en.wikipedia.org/wiki/Spanish_American_War Read the section called Aftermath. =) Thanks! Sure helped- Never thought of Wikipedia!
March 5, 2007

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