Wednesday
February 22, 2017

Posts by seth

Total # Posts: 198

Physics
A 0.30 kg puck, initially at rest on a frictionless horizontal surface, is struck by a 0.20 kg puck that is initially moving along the x axis with a velocity of 2.8 m/s. After the collision, the 0.20 kg puck has a speed of 0.5 m/s at an angle of θ = 53° to the ...
October 23, 2011

physics
How far to the nearest tenth of a meter can a runner running at 15 m/s run in the time it takes a rock to fall from rest 68 meters?
October 6, 2011

Physics
A box of books weighing 290 N is shoved across the floor of an apartment by a force of 400 N exerted downward at an angle of 35.0° below the horizontal. If the coefficient of kinetic friction between box and floor is 0.57, how long does it take to move the box 3.80 m, ...
October 2, 2011

Physics
A train has a mass of 5.22 multiplied by 106 kg and is moving at 70.0 km/h. The engineer applies the brakes, which results in a net backward force of 1.87 multiplied by 106 N on the train. The brakes are held on for 37.0 s. (a) What is the new speed of the train? (b) How far ...
October 2, 2011

science
a mineral is organic, which means that it contains what?
September 28, 2011

algebra
sam mowed half of the yard on friday and half of the remaining grass on saturday what fractional part of yard still needs to be mowed
September 27, 2011

math
how do you find the square root of 57 and then round to the nearest tenth
September 27, 2011

Chemistry
In the following reaction, it 13g of sodium are reacted how many grams of copper(solid) can be obtained? 2Na(s)+ Cu(NO3) 2 - - > 2NaNO3 + Cu(s)
September 25, 2011

Math
If the product of two numbers is 65 and one of the numbers is 8 more than the other, what is the remaining number?
September 15, 2011

September 6, 2011

physics
How many mL of orange juice would be required to get the recommended daily allowance of 60 mg of vitamin C? (Concentration of vitamin C is .011 moles/L in 5.0 mL of juice).
May 4, 2011

world history
is pennsylvania's government a monotheistic or not?
April 30, 2011

Physics
The useful power output of Bryan Allen, who flew a human-powered airplane across the English Channel on June 12th, 1979, was about 350 W. The propellor of the airplane was driven by the pilot's legs, using a bicycle-tyoed mechanism. Using the efficiency for legs (20%), ...
April 5, 2011

physics
"By means of a rope, whose mass is negligible, two blocks (mass: 11kg and 44 kg) are suspended over a pulley. The pulley can be treated as a uniform solid cylindrical disk. The downward acceleration of the 44 kg block is observed to be exactly one half the acceleration ...
April 3, 2011

physics
"A solid cylinder and a thin-walled hollow cylinder have the same mass and radius. They are rolling horizontally along the ground toward the bottom of an incline. They center of mass of each cylinder has the same translational speed. The cylinders roll up the incline and ...
April 3, 2011

Physics
"A 1220-N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A 1960-N crate hangs from the far end of the beam. Find a) the magnitude of the tension in the cable and b) the magnitude of the horizontal and vertical ...
April 3, 2011

Physics
"A small 0.5 kg object moves on a frictionless horizontal table in a circular path of radius 1 meter. The angular speed is 6.28 rad/s. The object is attached to a string of negligible mass that passes through a small hole in the table at the center of the circle. Someone ...
April 3, 2011

physics
"A small 0.5 kg object moves on a frictionless horizontal table in a circular path of radius 1 meter. The angular speed is 6.28 rad/s. The object is attached to a string of negligible mass that passes through a small hole in the table at the center of the circle. Someone...
April 1, 2011

physics
"A 1220-N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A 1960-N crate hangs from the far end of the beam. Find a) the magnitude of the tension in the cable and b) the magnitude of the horizontal and vertical ...
April 1, 2011

physics
"A solid cylinder and a thin-walled hollow cylinder have the same mass and radius. They are rolling horizontally along the ground toward the bottom of an incline. They center of mass of each cylinder has the same translational speed. The cylinders roll up the incline and...
April 1, 2011

physics
"By means of a rope, whose mass is negligible, two blocks (mass: 11kg and 44 kg) are suspended over a pulley. The pulley can be treated as a uniform solid cylindrical disk. The downward acceleration of the 44 kg block is observed to be exactly one half the acceleration ...
April 1, 2011

physics
Since there are no non-conservative forces involved in this scenario, you can use the principle of the conservation of momentum. Set up the momentum of the baseball player equal to the momentum of the baseball: (75kg)(vB)=(0.145kg)(40m/s). The velocity of the baseball player ...
March 31, 2011

separatio of variables
solve the initial value problem by separation of variables dy/dx=6x^2y and y(0)=4
March 19, 2011

separation of variables
solve the initial value problem by separation of variables dy/dx=x2/y given y=-5 when x=3
March 19, 2011

geometry
What does it mean when the scale factor of the actual object to its model is less than one?
February 6, 2011

diameter
if the sum of the diameters of two circles is 28 inches one circle has a diameter that is 8 inches longer than the diameter of the other what are the diameters of the two circles
January 24, 2011

math
Explain why arcsin 3 is undefined.
January 21, 2011

chemistry
Is this a buffer system? NH3/(NH4)2SO4? It is formed by mixing NH3 (weak base) and a strong acid (H2SO4), but according to my worksheet it is not a buffer system. Why is this so? Isnt it a buffer as long as it consists of a weak base and its salt of a strong acid? Please do ...
January 13, 2011

science
how does movement differs among Bacteria, grasshoppers, fish, bear
August 17, 2010

chemistry
1) DETERMINE pH of each of the following 2-component solutions. 0.08M RbOH & 0.130M NaHCO3
July 18, 2010

chemistry
Suppose a fuel-cell generator was used to produce electricity for a house. If each H2 molecule produces 2e- , how many kilograms of hydrogen would be required to generate the electricity needed for a typical house? Assume the home uses about 850 kWh of electricity per month, ...
July 11, 2010

physics
carts of a roller coaster are travelling 5m/s over the top of the first hill. If there is no energy loss due to friction and the hill is 50m high,what speed will the carts have at the bottom
July 1, 2010

physics
carts of a roller coaster are travelling 5m/s over the top of the first hill. If there is no energy loss due to friction and the hill is 50m high,what speed will the carts have at the bottom
July 1, 2010

chemistry
How much limestone (CaCO3) in kilograms would be required to completely neutralize a lake with a volume of 5.2 x 10^9L . The lake contains 5.0 x 10^-3 moles of H2SO4 per liter?
June 28, 2010

chemistry
How much limestone (CaCO3) in kilograms would be required to completely neutralize a 5.2 x 109 --L lake containing 5.0 x 10 -3 of H2 SO4 per liter?
June 28, 2010

math
what is a mode
May 2, 2010

CHEM
41.7 g KBr
March 22, 2010

I need a good thesis statement for a research paper about agriculture as a career.
February 15, 2010

Grammar
Yes, and the sentence is exactly as written. I'm just supposed to chose. That is why it is confusing.
November 16, 2009

Grammar
Money might be sewn into a woman's or women's coat linings. Worry haunted the refugee children's or childrens' eyes
November 16, 2009

Grammar
What is the possessive form of democracy in the following sentence. Would democracy followers win the struggle. Is it democracies'
November 16, 2009

calculus
find the derivative (1+x)(2+x)....(10+x)
November 13, 2009

math
October 28, 2009

Pre-Algebra
Can you type the full question to give us the depreciation rate???
October 27, 2009

eng
Education has helped my life improve as I am now able to understand and form abstract ideas.
October 27, 2009

social studies
Search for General Robert Lee -
October 27, 2009

Managerial Accounting
Depending on the business decision. First I would compare income versus outgoing costs verus any surplus - Then I would use that to make my decision to say buy a business item or expand, downsize etc
October 27, 2009

college
It's a structural alteration of the active site of a protein, rendering it incapable of functioning. Depending on the protein molecule concerned and the circumstances surrounding the denaturation, it can be either temporary or permanent. Common causes of denaturation are ...
October 27, 2009

economics
A- in the first scenario the 16gb would drop in price. b- In the second the price would remian the same to fool consumers into believing that they are getting a bargain. Typical Business Practise
October 27, 2009

spanish
to correct the indicated fields
October 26, 2009

Pre-Calc (ugent!!!)
haha is this a last minute calendar problem by any chance? because it's october tomorrow and i have have this problem too! lets hope somebody answers soon...
September 30, 2009

math (challenging)
If R is the remainder when each of the numbers 1059, 1417, and 2312 is divided by D, where D is an integer greater than 1, compute the value of D-R
September 30, 2009

algebra
Think of it as multiplying the fraction by a whole number. One third three times is 1. The order in which you look at multiplication does not matter, the results are the same. 3x(1/3)=1 and (1/3)x3=1
September 1, 2009

chemistry
in column chromatography in general do polar or nopolar elute first
September 1, 2009

Math/Science
I'm working on a worksheet, measuring in metric units. The task is to change each measurement to the given unit. For example, 84m 15cm to Centimeters. How do I come up with the answer. Thank You Seth 7th Grade
August 26, 2009

chemistry
In which one of the following processes is ΔH = ΔE? a. 2HI(g) → H2(g) + I2(g) at atmospheric pressure. b. Two moles of ammonia gas are cooled from 325°C to 300°C at 1.2 atm. c. H2O(l) → H2O(g) at 100°C at atmospheric pressure. d. CaCO3(s) &#...
August 15, 2009

calculus
n(x)=x^5+xe^x, find the real zeroes using newton-raphson methodology.
August 2, 2009

Math
you guys suck!
June 13, 2009

physics
Your hard drive can spin up to 7500 rpm from rest in 5 s. If your hard drive's mass is 40 g and its radius is 2.5 in, what is the force applied to the drive if the force is applied at a point 0.25 in from the center? Assume the drive is a solid, uniform disk with I = (1/2)...
May 2, 2009

physics
A container has a large cylindrical lower part with a long thin cylindrical neck. The lower part of the container holds 12.5 m^3 of water and the surface area of the bottom of the container is 5.00 m^(2 ). The height of the lower part of the container is 2.50m and the neck ...
April 21, 2009

physics
A student opens a 12.0 kg door If the door is 2.00 m in height and 1.00 m wide what is the moment of inertia of the door about its hinges. The equation for moment of inertia about the hinges is I =1/3 mr^2 should i use the the width or the height as my r i think it should be ...
April 19, 2009

PC Basics
1-B 2-C 3-A 4-B 5-A 6-B 7-A 8-C 9-C 10-C 11-B 12- 13-D 14-C 15-C 16-A 17-D 18-B 19-C 20-B
March 24, 2009

Estimating rounding(Math)
88.99 roundes to 90.00 and 9.69 roundes to 100.00 10.00
March 23, 2009

an someone help me learn an easy way to remember metric conversions?? thanks, Seth
March 23, 2009

physics
A 9.3 kg firework is launched straight up and at its maximum height 45 m it explodes into three parts. Part A (0.5 kg) moves straight down and lands 0.29 seconds after the explosion. Part B (1 kg) moves horizontally to the right and lands 10 meters from Part A. Part C moves to...
December 22, 2008

physics
A 9.3 kg firework is launched straight up and at its maximum height 45 m it explodes into three parts. Part A (0.5 kg) moves straight down and lands 0.29 seconds after the explosion. Part B (1 kg) moves horizontally to the right and lands 10 meters from Part A. Part C moves to...
December 22, 2008

physics
A 9.3 kg firework is launched straight up and at its maximum height 45 m it explodes into three parts. Part A (0.5 kg) moves straight down and lands 0.29 seconds after the explosion. Part B (1 kg) moves horizontally to the right and lands 10 meters from Part A. Part C moves to...
December 21, 2008

MATH
NORALIE USES 22 GAL OF GAS TO GO 682 MILES. WHAT ARE THE 2 UNIT RATES SHE MIGHT COMPARE & COMPUTE THEM I KNOW ONE IS MILES PER GALLON BUT WHAT IS THE OTHER UNIT RATE? LITERS PER KILOMETER? PLEASE HELP
November 20, 2008

algebra
(3x^2 - 5x - 6) + (5x^2 +4x + 4) Is says you have to simplify this.. How would you do that? Multiply them together?
November 19, 2008

Pre-Algebra
-t = -t -6 0=-6 Thats the answer and you put no answer. That's just how some are.
November 19, 2008

algebra
No it ended up looking wierd when I submited, sorry.Here is the real question (3.2 x 10^5) (2 x 10^-3) -------------------------- (2 x 10^-5)
November 19, 2008

algebra
(3.2 x 10^5) (2 x 10^-3) ------------------------- (2 x 10^-3) I got 1.6 x 10^5 like this, (3.2 x 10^5) (2 x 10^-3) ------------ x ----------- (2 x 10^-5) (2 x 10^-5) (3.2 x 10^5) (2 x 10^-3) ------------ x (2 x 10^-5) (3.2 x 10^5) ------------ > 3.2 10^5 (2 x 10^10...
November 19, 2008

World History
What is the ter for the political philosophy followed by Hilter and Mussolini that emphasized importance of the nation or of an ethic group and the supreme authority of the leader over that of the individual?
April 13, 2008

World History
What was the German form of this type of philosophy that was shaped by Hitler's fanatical ideas about German nationalism and racial superiority known as? The Third Reich
April 13, 2008

world history
what steps did the major powers take to prtect the peace?
March 27, 2008

social studies
Why in 1920, did Americans no longer favor the Progressive plateforum
March 19, 2008

American history
Why in 1920 did American's no longer favor the Progressive platform?
March 19, 2008

world history
what is the term for the policy of qvoiding conflict that the the United States had originally pursued during the war that was based on the belief that the country should maintain a limited involvement in world affairs while trying to broker a peace?
February 7, 2008

world history
what is the common name for the clause in the treaty that forced Germany to assume full blame for causing the war?
February 7, 2008

algebra
what are you support to do.
February 4, 2008

algebra
compare the slopes and tell whether the lines are parallel. y = x + 2 and y = -x -3 can you tell me how to set up the problem so that I can do it.
February 4, 2008

Math
12.50
February 2, 2008

world history
which country wanted to punish Serbia for encouraging terrorism within its borders?
January 29, 2008

substitution method
-x-4y=-14 2x=y+1 Let's look at your two equations. -x - 4y = -14 2x = y + 1 Let's solve the second equation for y: y = 2x - 1 Now let's substitute (2x - 1) for y in the first equation: -x - 4(2x - 1) = -14 -x - 8x + 4 = -14 -9x + 4 = -14 -9x = -18 x = 2 Substitute ...
February 20, 2007

Geometry
Find x in terms of y e-zgeometry. com/pow/pictures/25.gif It would be helpful if the verticies had letters at the site you left: http://www.e-zgeometry.com/pow/pictures/25.gif The two smaller triangles are similar to the larger one (the altitude y)
January 30, 2007

pigskin
i hate it mr.kerr sucks
October 30, 2006

counting
how many squares are in an 8x8 checkerboard? (the answer is not 64 because that's too low.) Thank you for using the Jiskha Homework Help Forum. Unfortunately, you don't state the size of each square. Hopefully the following will answer your question! Continuing in this...
October 22, 2006

math
One line can divide a plane into two regions. Two lines can divide a plane into four regions. Three lines intersecting at a point can divide a plane into six regions, but you can get more regions than that if the lines don't intersect at a single point. My question for you...
August 27, 2006

Ratios and proportions
RATIOS AND PROPORTIONS x 3 - = - 4 2 The boards don't post spacing as we would wish. I suppose the problem is x/4 = 3/2. Multiply left and right sides by 4. That will "cancel" the 4 in the denominator of the left side. Now multiply both sides by 2. That will &...
August 5, 2006

Variable
SOLVING EQUATIONS WITH THE VARIABLE ON BOTH SIDES Solve the equation. Then check your solution. 4x-9 = 7x+12 Just remember that one can add, subtract, multiply, divide, etc but whatever is done to one side must be done to the other side of an equation. 4x - 9 = 7x + 12. Add 9 ...
August 5, 2006

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