Friday
October 21, 2016

# Posts by Sasha

Total # Posts: 420

physics
Determine how much water would be present in a 10 tonne sample of lignite, has a moisture content of 65%, before crushing and drying. 10 tonnes is 10,000 kg.
March 10, 2010

physics
Wouldn't you take tan-1 of Y/X Y= 80 because you're heading north on a y-axis then 45 m would be your x-axis so tan-1 (80/45)??
March 7, 2010

physics
You walk 80 m to the north, then turn 60 degrees to your right and walk another 45 m. Determine the direction of your displacement vector. Express answer relative to east :)
March 7, 2010

physics
A boy throws a rock with an initial velocity of 2.47 m/s at 30.0 degrees above the horizontal. How long does it take for the rock to reach the maximum height of its trajectory?
March 7, 2010

physics
A plane flies directly from city A to B, which are separated by 2300mi. From A to B, the place flies into a 65mi/hr headwind. ON the return trip from A to B, the wind velocity is unchanged. The trip from B to A takes 44 min less than the trip from A to B. What is the airspeed...
March 7, 2010

Calculus
i got 7.7 for width and 9.5 for length? does this sound right
March 1, 2010

Calculus
A poster is to have an area of 170 in2 with 2 inch margins at the bottom and sides and a 3 inch margin at the top. What dimensions will give the largest printed area? (Give your answers correct to one decimal place.)
March 1, 2010

physics
the first excited state of the nucleus of uranium-235 is 0.051 MeV above the ground state. what is the wavelength of the photon emitted when the nucleus makes a transition to the ground state? (in meters)
February 27, 2010

music
c. Dissonance Many pieces today are very dissonant. In the olden days, composers were pressured to create music that was pleasing to the ear, so in the past, music was more melodious.
February 12, 2010

What is one strength you see in the current U.S. health care system? What is one weakness you see? List and describe one of the challenges facing the U.S. health care system.
February 11, 2010

criminal justice
1.Which option (front-end solutions, double bunking, or back-end solutions) do you feel is the most effective in our correctional system?
February 11, 2010

Calculus
Find the points of inflection of the curve below. Round the answers to three decimal places. (Hint: All three are in a straight line.) y= (1+x)/(1+x^2)
February 8, 2010

Physics
Friction provides the force needed for a car to travel around a flat, circular race track. What is the maximum speed at which a car can safely travel if the radius of the track is 77.0 m and the coefficient of friction is 0.36?
February 2, 2010

Math
How many ways can 3 students be arranged in three chairs? I'm not really sure but I think that the answer will be 9 (nine), is that correct..?
January 15, 2010

chemistry
ANSWER is nf=3. i tried it
January 15, 2010

Physics
I just need help with part c. I know stopping takes longer but we have to explain why. A student stands on a bathroom scale in an elevator at rest on the 64th floor of a building. The scale reads 849 N. (a) As the elevator moves up, the scale reading increases to 912 N. Find ...
January 5, 2010

Physics
You are driving a 2590.0 kg car at a constant speed of 14.0 m/s along an icy, but straight, level road. As you approach an intersection, the traffic light turns red. You slam on the brakes. Your wheels lock, the tires begin skidding, and the car slides to a halt in a distance ...
January 5, 2010

Physics
If you use a horizontal force of 31.0 N to slide a 10.5 kg wooden crate across a floor at a constant velocity, what is the coefficient of kinetic friction between the crate and the floor? I tried 3.32 but it said that was wrong ?
January 5, 2010

Physics
if arnold strongman and suzie small each pull very hard on opposite ends of a massless rope in a tug-of-war the greater force on the rope is exerted by ? i think both the same
January 5, 2010

Physics
okay i changed it they didn't want a negative sign for some reason
January 5, 2010

Physics
Suppose a 68-kg boy and a 40-kg girl use a massless rope in a tug-of-war on an icy, resistance-free surface. If the acceleration of the girl toward the boy is 3.0 m/s2, find the magnitude of the acceleration of the boy toward the girl.
January 5, 2010

Physics
Okay the answer I am getting for this is 36666.67 but it said this was wrong? Maybe I am doing it wrong though I did 5500/.150 and it did say that the acceleration was right as a positive number
January 5, 2010

Physics
As a baseball is being caught, its speed goes from 27.5 m/s to 0.0 m/s in about 0.0050 s. The mass of the baseball is 0.150 kg. (a) What is the baseball's acceleration? 5500 m/s^2 (b) What are the magnitude and direction of the force acting on it? and is it in opposite in ...
January 5, 2010

physics
1. Three particles with charges of +11 mC each are placed at the vertices of an equilateral triangle with sides of 15.0 cm. What is the magnitude and direction of the net force on each particle? 2. A proton is released in an uniform electric field and it experiences a force of...
January 4, 2010

Physics
these are the two answers I got... 10 or 10.22
January 3, 2010

Physics
I don't understand this formula?
January 3, 2010

Physics
I found the first three parts of the question but I can't figure out part d. The instruments attached to a weather balloon in the figure below have a mass(m) of 5.5 kg. The balloon is released and exerts an upward force(F) of 109 N on the instruments. (a) What is the ...
January 3, 2010

Physics
its a web assign and i typed that answer in but it said it was wrong
January 3, 2010

Physics
so it should be -1.76 m/s^2
January 3, 2010

Physics
Suppose a 68-kg boy and a 40-kg girl use a massless rope in a tug-of-war on an icy, resistance-free surface. If the acceleration of the girl toward the boy is 3.0 m/s^2, find the magnitude of the acceleration of the boy toward the girl.
January 3, 2010

physics
why should spare petrol for cars be carried in a metal rather than plastic container? Explain why the inside of the car is a safe place during a thunderstorm. calculate the charge on 4.0 * 10^20 protons.
December 16, 2009

charges of +1.000 C are located at the corners of a 45-45- right triangle which has a hypotenuse that is 1.414 m long. Determine the resultant force on the charge located at the vertex of the right angle.
December 15, 2009

the force between two charges is 20.0 N. if one charge is doubled, the other is tripled, and the distance between them is halved, calculate the resultant force between them.
December 15, 2009

Physics
A football coach sits on a sled while two of his players build their strength by dragging the sled across the field with ropes. The friction force on the sled is 800 N and the angle between the two ropes is 20°. How hard must each player pull to drag the coach at a steady ...
November 20, 2009

Physics
A 2.6 N block is at rest on a horizontal surface. A 0.9 N upward force is applied to the block by means of attached vertical string. (a) What is the magnitude of the force of the block on the horizontal surface?
November 20, 2009

Physics
A football coach sits on a sled while two of his players build their strength by dragging the sled across the field with ropes. The friction force on the sled is 800 N and the angle between the two ropes is 20°. How hard must each player pull to drag the coach at a steady ...
November 20, 2009

Physics
A football coach sits on a sled while two of his players build their strength by dragging the sled across the field with ropes. The friction force on the sled is 800 N and the angle between the two ropes is 20°. How hard must each player pull to drag the coach at a steady ...
November 19, 2009

Physics
(a) Suppose you throw a football. At some instant, when the ball is in contact with your hand, your hand exerts a force of 100 N on the ball in the +x direction. What is the force of the ball on your hand?
November 19, 2009

Physics
A 2.6 N block is at rest on a horizontal surface. A 0.9 N upward force is applied to the block by means of attached vertical string. (a) What is the magnitude of the force of the block on the horizontal surface?
November 19, 2009

spanish
después de eso iré al término de autobuses y siguiente comeré una torta
November 19, 2009

History
to what extent was Hitler's rise to power due to personal appeal and ability?
November 19, 2009

physics
a 145g baseball is dropped from a tree 13.0m above the ground. with what is the velocity of the baseball at the ground after it falls 13.0m? B. If it actually hits the ground with a speed of 8.0o m/s, what is the average force of air resistance exerted on it?
November 12, 2009

physics
21.7 kg child descends a slide 3.5 m high and reaches the bottom with a speed of 2.2 m/s How many joules of thermal energy are created due to friction as a kid slides down a slide?
November 12, 2009

history
What would be a good thesis statement for my intro paragraph? Effect and Evolution of African Americans in Minnesota Intro The first Great Migration occurred after the Civil War and after the 13th amendment was passed. With the passing of the 13th amendment, many African ...
November 11, 2009

Physics
A 3800 kg open railroad car coasts along with a constant speed of 8.60 m/s on a level track. Snow begins to fall vertically and fills the car at a rate of 3.50 kg/min. ignoring friction with the tracks what is the speed of the car after 90.0 minutes?
November 11, 2009

physics
A sports car of mass 950kg (including the driver) crosses the rounded top of a hill (radius = 95m) at 22m/s. Determine a) the normal force exerted by the road on the car, b) the normal force exerted by the car on the 72kg driver, and c) the car speed at which the normal force ...
November 3, 2009

physics
a .45kg ball, attached to the end of a horizontal cord, is rotated in a circle of radius 1.3m on a frictionless horizontal surface. if the cord will break when the tension in it exceeds 75 N, what is the maximum speed the ball can have?
November 3, 2009

PHYSICS
so i did a = 1.25^/1.1 = 1.42 m/s^2 then F =ma = 25(1.42) = 35.5N is that right?
November 3, 2009

PHYSICS
a child sitting 1.10 m from the center of a merry go round moves with a speed of 1.25 m/s. calculate the centripetal acceleration of the child and the net horizontal force exerted on the child (mass = 25 kg).
November 3, 2009

Physics
Astronauts who spend long periods in outer space could be adversely affected by weightlessness. One way to simulate gravity is to shape the spaceship like a cylindrical shell that rotates, with the astronauts walking on the inside surface. Explain how this simulates gravity. ...
November 1, 2009

physics
Highway safety engineers build soft barriers such as the one shown in Figure 3-21, so that cars hitting them will slow down at a safe rate. A person wearing a safety belt can withstand an acceleration of -3.0 102 m/s2. How thick should barriers be to safely stop a car that ...
October 27, 2009

English
probably annotations or writing in the margins highlighting or underlining what you think is important
October 27, 2009

physics
what would part b be?
October 27, 2009

physics
A race car can be slowed with a constant acceleration of -14 m/s2. (a) If the car is going 44 m/s, how many meters will it travel before it stops? (b) How many meters will it take to stop a car going twice as fast?
October 27, 2009

physics
i tried squaring earth's radii and i tried multiplying it by 2
October 26, 2009

physics
calculate the force of Earth's gravity on a spacecraft 12,800 km (2 Earth radii) above Earth's surface if its mass is 1350 kg. i know the universal gravitation formula is Fg = G [(m1 m2)/ r^2] but im not getting anywhere near the multiply choice answers of: 14,470, ...
October 26, 2009

physics
sweet!! thank you =)
October 26, 2009

physics
ohh okay so the weight would be the same on the ground if its moving up at a constant speed?
October 26, 2009

physics
so the it would be the least on the way down, b/c your force, pushing on the scale is less. And it is greatest on the way up, since your force of push is stronger. And I would say in free fall it is the same as ground state?
October 26, 2009

physics
When will your apparent weight be greatest, as measured by a a scale in a moving elevator; when the elevators: (a) accel. downward (b) accel. upward (c) is in free fall (d) moves upward at a constant speed? In what case would you weight be the least? When would it be the same ...
October 26, 2009

Physics
a 75-kg petty theif wants to escape from a third story window. unfortunately a makeshift rope of sheets tied together can support a mass of only 58 kg. how might the theif use this rope? give a quantitative answer.
October 24, 2009

Chemistry
hopefully this helps... "Ether is the oxide of this base, and alcohol the hydrated oxide; that is, chemically regarded, the only difference between ether and alcohol is, that the latter contains one equivalent of water" albumen . conservation-us . org/ library/ ...
October 24, 2009

13000N 12000N 11000N 10000N
October 24, 2009

these are the answer choices though Problem 10 13000 N 12000 N 11000 N 10000 N
October 24, 2009

math
Round to the nearest ten thousand. Add and compare the answers. 16,250 + 58,351 = round first
October 7, 2009

math
Business and finance. In a bottling company, a machine can fill a 2-liter bottle in 0.5 seconds and move the next bottle into place in 0.1 second how many 2-L bottles can be filled by the machine in 2 hour?
August 11, 2009

economics
What is the correct treatment of a stock dividend issued in mid-year when computing the weighted average number of common shares outstanding for earnings per share purposes?
April 30, 2009

accounting
On January 1, 2004, Carnival Shipping bought a machine for \$1,500,000. At that time, this machine had an estimated useful life of six years, with no salvage value. As a result of additional information, Carnival determined on January 1, 2007, that the machine had an estimated ...
April 28, 2009

accounting
Please let me know if I'm right!! I made the following errors in counting its year-end physical inventories: 2001 \$ 60 overstatement 2002 \$108 understatement 2003 \$90 overstatement t I'm thinking the entry to correct the accounts at the end of 2003 is Retained Earnings...
April 28, 2009

accounting
took my test. answer 0.4 is not right :( I don't understand then....
April 28, 2009

accounting
thanks :)
April 28, 2009

accounting
please let me know if I'm right common stock \$600 additional paid-in capital \$250 retained earnings \$370 net income for year \$240 I need return on common stockholder's equity=net income/stock equity=240/600=0.4
April 28, 2009

economics
how is knowledge a public good ?
March 21, 2009

Chemistry
if u ever found the answers, post them up
February 1, 2009

physics
the inclined plane is 30* from the ground a) What is the mechanical advantage of the inclined plane? b) A weight of 100N is to be lifted using the inclined plane. What is the minimum applied force for this job? c) Suppose that an applied force of 200N is needed to move a block...
January 21, 2009

Human Services
In the book, Dimensions of the Human Behavior, it is talking about the merits of multiple behavior. Your answer did not seem to fit into what the book was talking about. I have to go to bed now, I have to be up at 4:00 in the morning. I will be looking for your response when I...
January 7, 2009

Human Services
Well, I put this on here because I needed help because I do not know where I need to be at and I don't believe the answer you gave me was correct so that is why I reposted it. Excuse me for this being my first time to use this kind of website.
January 7, 2009

Human Services
What are the merits of multiple perspectives when examining human behavior? Why is it important? Provide examples of the impact of using multiple perspectives when providing services to a family or individual.
January 7, 2009

Hunting Training for Dogs
I would agree with you
January 7, 2009

Human Behavior
What are the merits of multiple perspectives when examining human behavior? Why is it important? Provide examples of the impact of using multiple perspectives when providing services to a family or individual.
January 7, 2009

Human Behavior
What are the merits of multiple perspectives when examining human behavior? Why is it important? Provide examples of the impact of using multiple perspectives when providing services to a family or individual.
January 7, 2009

science
how do we grow quickly do we grow
December 1, 2008

math
lol, thank you. I understand the problem now.
October 27, 2008

math
Yes, it probably is, but I have a hard time solving problems that involve 3-4-5 triangles or anything similar to that.
October 27, 2008

math
Edna and Nancy leave the house of a common friend at the same time and walk for 4 hours. Edna walks due east at the average rate of 4 kilometers per hour and Nancy walks due north at the average rate of 3 kilometers per hour. What is the straight-line distance between them in...
October 27, 2008

math
The answer must be one. Thanks.
October 27, 2008

spellING
A SMAIL WILD BIRD OF THE PATRIDGE FAMILY
October 27, 2008

science
what is the name for precise information provided by numerical data
September 17, 2008

Science and acrostic poems
why is saturn NOT on here? D:<
May 27, 2008

Japanese
What is an easy wway to remember Japanese other than flash cards?
April 15, 2008

chemistry -check over work
Naphthalene (C10H8)is a solid aromatic compound often sold as mothballs.The complete combustion of this substance to yield CO2(g)and H2O(l)at 25 ْC yields -5154 kJ/mol. A. write balanced equation for the combustion of C10H8. C10H8+12O2->10CO2+4H2O ΔH =-5154 B. ...
April 14, 2008

math
(2*3)(3-7) (6)(-4) -24
April 14, 2008

math(did i do this right)
i think it should be like this: 8h^2-4h 4h(2h-1). 4h is the GCF.
April 14, 2008

chemistry
AHHH help i have no idea!!!
April 4, 2008

english-check over work
March 19, 2008

english-check over work
Furthermore, the Court is a corrupt justice system in that a person who has charges brought against him/her does not know what crime he/she has committed. “The legal records of the case, and above all the actual charge sheets, were inaccessible to the accused and his ...
March 19, 2008

english-check over work
As Joseph K. concentrates on proving his innocence, his life spirals out of control. He is thinking about the case every waking moment that his job as bank manager seems to be slipping out of his hands. “The thought of his case never left him now.” He is so ...
March 19, 2008

english-check over work
Kafka sets the story in an urban and modern geographical location. He does not specifically name a country that it took place in. Instead, he chooses to be vague to show that a corrupt system of government can be in any part of the world. “Down the whole length of the ...
March 19, 2008

english-check over work
In his quest to prove his innocence Joseph encounters four different women: Frau Grubach, Frau Burstner, Lenin, and Elsa. They all have a role in which they cater to Joseph’s needs. They are either his caretaker/servant (Frau Grubach) or his mistresses (the other three). ...
March 19, 2008

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