Posts by seth

Total # Posts: 201

physics
a disk has a mass of 2kg and a length of 2 meters and it oscillates about an axis that is 1.5 meters from the center of the disk. It is initially displaced at an angular displacement of 0.2 radians and released. A) What is the equation of motion? B)What is the kinetic energy ...

physics
What is the gravitational force on a bar that is 3 meters long and has a density of 3x kg/m and lies 3 meters from a 2 kg point mass

Physics
A 2 kg steel ball strikes a wall with a speed of 8.15 m/s at an angle of 54.4◦ with the normal to the wall. It bounces off with the same speed and angle, as shown in the figure. If the ball is in contact with the wall for 0.243 s, what is the magnitude of the average ...

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 ...

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?

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, ...

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 ...

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

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

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

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)

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?

algebra
34a*22

3rd grade math
my answer is 37

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).

world history
is pennsylvania's government a monotheistic or not?

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%), ...

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 ...

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 ...

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 ...

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 ...

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...

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 ...

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...

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 ...

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 ...

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

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

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

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

math
Explain why arcsin 3 is undefined.

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 ...

science
how does movement differs among Bacteria, grasshoppers, fish, bear

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

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, ...

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

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

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?

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?

Math: Is my answer correct?
it is a

math
what is a mode

science
yes

art
omg

CHEM
41.7 g KBr

9th grade
I need a good thesis statement for a research paper about agriculture as a career.

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

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

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

calculus
find the derivative (1+x)(2+x)....(10+x)

math
Use your Sci Calculator

Pre-Algebra
Can you type the full question to give us the depreciation rate???

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

social studies
Search for General Robert Lee -

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

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 ...

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

statistics
2:1

college
25:52

spanish
to correct the indicated fields

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...

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

9th grade geometry
Y=7

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

chemistry
in column chromatography in general do polar or nopolar elute first

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

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) &#...

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

Math
you guys suck!

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)...

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 ...

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 ...

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

Estimating rounding(Math)
88.99 roundes to 90.00 and 9.69 roundes to 100.00 10.00

5th grade math
an someone help me learn an easy way to remember metric conversions?? thanks, Seth

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...

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...

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...

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

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

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

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)

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...

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?

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

world history
1926

world history
what steps did the major powers take to prtect the peace?

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

American history
Why in 1920 did American's no longer favor the Progressive platform?

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?

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

algebra
what are you support to do.

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.

Math
12.50

world history
which country wanted to punish Serbia for encouraging terrorism within its borders?

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 ...

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)

pigskin
i hate it mr.kerr sucks

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...

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...

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 &...

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