Thursday

December 18, 2014

December 18, 2014

Total # Posts: 83

**Math**

Thanks!
*December 16, 2014*

**Math**

what is the term for a relation in which each input value corresponds to exactly one output value?
*December 16, 2014*

**Physics**

When a 34-m-long metal pipe is heated from 13 °C to 39 °C, it lengthens by 2.56 cm. Determine the linear expansion coefficient. I tried to start by taking the difference of temperature times the length of the pipe and finally divide 2.56 by the number i got before but ...
*December 8, 2014*

**Physics**

What air temperature will feel four times as warm as 0 °F?
*December 7, 2014*

**Physics**

A force, F = (6x̂ + 7y hat) N, is applied to an object at a point whose position vector with respect to the pivot point is r = (7x̂ + 7y hat + 7ẑ) m. Calculate the torque created by the force about that pivot point.
*November 14, 2014*

**Physics**

Determine the moment of inertia for three children weighing 64.0 lb, 44.0 lb and 83 lb sitting at different points on the edge of a rotating merry-go-round, which has a radius of 12 ft.
*November 14, 2014*

**Physics**

You are holding the axle of a bicycle wheel with radius 35 cm and mass 1 kg. You get the wheel spinning at a rate of 55 rpm and then stop it by pressing the tire against the pavement. You notice that it takes 2.0 s for the wheel to come to a complete stop. What is the angular ...
*November 6, 2014*

**Physics**

A 1424-kg railroad car traveling at a speed of 11 m/s strikes an identical car at rest. If the cars lock together as a result of the collision, what is their common speed (in m/s) afterward?
*October 31, 2014*

**Math**

The planet Neptune has a radius of 15000 miles and rotates one revolution every 18 hours. What is the linear speed of a point on its equator, in miles per hours?
*September 28, 2014*

**math**

what type of polynomial is 5x^y? its binomial right?
*July 18, 2013*

**Biomedical Ethics**

Can there be individuals who deserve moral consideration even though they have no moral responsibilities? This question is confusing to me for some reason.
*January 31, 2013*

**chemistry**

Why does the compressed gas leaving the propane tank cause the temperature to drop around the valve?
*January 26, 2013*

**Math**

To convert a temperature in degrees Celsius to degrees Fahrenheit multiply the Celsius temperature by 9/5 and then add 32 F Is a temperature in degrees Celsius proportional to its equivalent temperature in degrees Fahrenheit.
*October 23, 2012*

**math**

Solve the equation: 1/x+3/x^2=-1
*May 5, 2012*

**World geography**

_______ is one of the first Latin American countries to have a separate ministry of tourism with dedicated funds within its federal governmental structure
*March 12, 2012*

**physics**

a spring is stretched 5*10^2m by a force of 5*10^-4N.a mass of 0.001kg is placed on the lower end of the spring.after equilibrium has been reached, the upper end of the spring is moved up and down so that the external force acting on the mass is given by F(t)=20coswt.calculate...
*February 11, 2012*

**maths**

a box contains 20 fuses ,out of which ,5 are defective.if a sample of 3 fuses is chosen from the box at random without replacement,find the probability that x fuses in this sample will be defective
*February 11, 2012*

**maths**

r1 and r2 are unit vectors in the x-y plane making angles a and b with the positive x-axis.by considering r1.r2 derive cos(a-b)=cos(a)cos(b)+sin(a)sin(b)
*February 11, 2012*

**math**

solve (4x^3y^3+1/x)dx+(3x^4y^2-1/y)dy=0
*February 11, 2012*

**maths**

d^2y/dx^2+4dy/dx+4y=4cosx+3sinx
*February 11, 2012*

**maths**

xdy-ydx=sqrt(x^2-y^2)dx
*February 11, 2012*

**maths**

write down the equation d^2u/dt^2=c^2 grad^2u in a plane polar coordinates .by the method of separation of variables , reduce the PDE to obtained to a set of ODE's
*February 11, 2012*

**physics**

find the solution of the wave equation for a vibrating string of length (l)=10units with ends fixed .it is given that c^2=1,initial velocity is zero and initial deflection is u(x,o)=k(sinx-sin2x)
*February 11, 2012*

**physics**

a mass of 60kg slides on a table. the frictional force is 60 times the velocity and the mass is being pushed with a force of 54sin2tN.find the velocity as a function of time if (v)=0 at (t)=0
*February 11, 2012*

**physics**

a stretched string is observed to vibrate with frequency 30Hz in its fundamental mode when the supports are 60cm apart. the amplitude at the antinode is 3cm.the string has a mass of 30kg.calculate the speed of propagation of the wave and the tension
*February 11, 2012*

**physics**

a circuit consist of an inductance of 0.05H, a resistance of 20ohms , a capacitor of 100uF and an angle of 100cos200t. find (i) and (q) given that q=0,and i=0 at t=0.
*February 11, 2012*

**physics **

an object was launched with the velocity of 20 m/s at an angle 45 degree to the vertical . at the top of its trajectory the object broke into two equal pieces.one piece fell vertically downward .where would the other piece fall?(g=10m/s^2)
*February 11, 2012*

**physics**

an ice skater spins about a vertical axis at an angular speed of 15 rad/s when her arms are outstreched . she then quickly pulls her arms into her sides in a very small time interval so that the frictional force due to ice are negligible.her initial moment of inertia about the...
*February 11, 2012*

**physics**

a circular disc rotates on a thin air film with a period of 0.3s. its moment of inertia about its axis of rotation is 0.06kgm^2. a small mass is dropped onto th disc and rotates with it . the moment of inertia of the mass about the axis of rotation is 0.04kgm^2.determine the ...
*February 11, 2012*

**physics**

a crate sits on the floor of a boxcar. the coefficient of fritcion between the crate and the florr is .600. what is the maximum speed that the boxcar can go around a curve of radius 200 m. without causing the crate to slide?
*February 3, 2012*

**chemistry**

The value of delata h for the reaction below is -186 kJ. Calculate the heat Kj released from the reaction of 25g of Cl2
*January 27, 2012*

**physics**

the person p walks at 4m.s west relative to the boat b as the boat is moving at 30 east relative to the land l.what is the reference frame of an observer standing on the land?
*January 24, 2012*

**Math**

All the seats in the theater are divided into 8 groups.There are 40 seats in each group.Write and solve a division equation to find how many seats there are in the theater.
*October 19, 2011*

**arithmetic**

find the 25th term of the arithmetic sequence 24, 19, 14, 9 ...
*July 10, 2011*

**Physics**

A Satellite that is 4175 miles from the center of the earth,obits with a period of 90 minutes. what is its centripetal acceleration?
*June 21, 2011*

**math**

Richard is flying a kite. The kite string makes an angle of 57 degress with the ground. If Richard is standing 100 feet from the point on the ground direcly below the kite, find the length of the kite string.. Please help!!!
*April 18, 2011*

**math**

In triangle ABC if <A and <B are acute angles and sin 10/13 , what is the value of cos A?
*April 18, 2011*

**MATH**

In right triangle ABC below, what is the sine of <A? this triangle has 7 cenimeteres and 24 cenimeters.
*April 18, 2011*

**MATH**

1.Isoscles obtuse triangle TRI with vertex angle T. 2.Rhombus RHOM with acute <H and the shorter diagonal. 3.Scalene right triangle SCA with midpointsL<M and N on SC, CA, and SA, respecitively. 4.Trapeoziod TRAP with TR|| A[, RE PA and P,E and A collinear 5.KIte KITE ...
*April 18, 2011*

**Math**

An airplane rises vertically 1000 feet over a horizontal distance of 1 mile. What is the angle of elevation of the airplane's path? (hint: 1 mile = 5280 feet)
*April 18, 2011*

**Math**

A laffer leaning against a house maes an angle of 60 degress with the ground. The foot of the leadder is 7 feet from the foundation of the house. How long is the ladder? Please help.
*April 18, 2011*

**Math**

From the top of a lighthouse 210 feet high, the angle if depression to a boat is 27 degress. Find the distance from the boat to the food of the lighthouse. The lighthouse was built at sea level.
*April 18, 2011*

**math**

From the top of a lighthouse 210 feet high, the angle if depression to a boat is 27 degress. Find the distance from the boat to the food of the lighthouse. The lighthouse was built at sea level.
*April 18, 2011*

**Math**

Richard is flying a kite. The kite string makes an angle of 57 degress with the ground. If Richard is standing 100 feet from the point on the ground direcly below the kite, find the length of the kite string.. Please help!
*April 18, 2011*

**math**

An airplane rises vertically 1000 feet over a horizontal distance of 1 mile. What is the angle of elevation of the airplane's path? (hint: 1 mile = 5280 feet)
*April 18, 2011*

**math**

An airplane rises vertically 1000 feet over a horizontal distance of 1 mile. What is the angle of elevation of the airplane's path? (hint: 1 mile = 5280 feet)
*April 18, 2011*

**math**

Richard is flying a kite. The kite string makes an angle of 57 degress with the ground. If Richard is standing 100 feet from the point on the ground direcly below the kite, find the length of the kite string.. Please help!!!
*April 18, 2011*

**math**

From the top of a lighthouse 210 feet high, the angle if depression to a boat is 27 degress. Find the distance from the boat to the food of the lighthouse. The lighthouse was built at sea level.
*April 18, 2011*

**math**

From the top of a lighthouse 210 feet high, the angle if depression to a boat is 27 degress. Find the distance from the boat to the food of the lighthouse. The lighthouse was built at sea level.
*April 18, 2011*

**math**

A laffer leaning against a house maes an angle of 60 degress with the ground. The foot of the leadder is 7 feet from the foundation of the house. How long is the ladder? Please help.
*April 18, 2011*

**math**

An airplane rises vertically 1000 feet over a horizontal distance of 1 mile. What is the angle of elevation of the airplane's path? (hint: 1 mile = 5280 feet)
*April 18, 2011*

**Math**

because i have to sketch, label and mark each figure. to every problem
*April 18, 2011*

**Math**

1.Isoscles obtuse triangle TRI with vertex angle T. 2.Rhombus RHOM with acute <H and the shorter diagonal. 3.Scalene right triangle SCA with midpointsL<M and N on SC, CA, and SA, respecitively. 4.Trapeoziod TRAP with TR|| A[, RE PA and P,E and A collinear 5.KIte KITE ...
*April 18, 2011*

**MATH**

this triangle has 7 cenimeteres and 24 cenimeters.
*April 18, 2011*

**MATH**

In right triangle ABC below, what is the sine of <A?
*April 18, 2011*

**Math**

In a shipment of 1000 light bulbs 1/40 of the bulbds were defective. What is the ratiio of defective bulbs to nondefective bulbs?
*April 18, 2011*

**Math**

If one leg of a right triangle is 8 inches long, and the other leg is 12 inches long. How many inches long is the triangles hypotenuse?
*April 18, 2011*

**Math**

A vendor has 14 hellium ballons for sale: 9 are yellow, 3 are red, and 2 are green. A ballon is selcted at random and sold. If the ballon sold is yellow, what is the probablity that the next ballon selected at random, is also yellow?
*April 18, 2011*

**Physical science**

what properties describe the second law of motion
*February 2, 2011*

**Physical science**

alot of my questions deal with speed and height. what are the different types formula I can use to figure these things out
*February 2, 2011*

**trig**

find the exact value of cos 3.14/8
*December 9, 2010*

**englsh**

what is the most inportant symbol of freedom the slaves.( in a narrative life of fredrick douglass?
*November 19, 2010*

**history**

what did the native american children gain and lost from assimilation policy.(from the indian reeducation movement)?
*November 17, 2010*

**history**

How did ranching become established in the West?
*November 15, 2010*

**history**

what was the role of sioux nad cheyenne in the battle of little bighorn?
*November 12, 2010*

**grade 1 math**

wat iz 15-7?
*November 5, 2010*

**chemistry**

Write an equation for the combustion of one mole of benzene, C6H6(l), and use data from Appendix D to determine delta G degrees (which is 124.5) at 298K if the products of the combustion are (a) CO2(g) and H2O(l), and (b)CO2(g) and H2O(g). Describe how you might determine the ...
*July 14, 2010*

**chemistry**

For the reaction Cl2(g)<-> 2Cl)g) Kp=2.45*10^-7 at 1000K. What is delta G (degrees) for this reaction at 1000K?
*July 14, 2010*

**chemistry**

How many grams of Iodine, I2 must be dissolved in725ml of carbon disulfide, CS2 (d=1.261 g/ml), to produce a 0.236m solution?
*June 28, 2010*

**Chemistry!!!**

the solubility of BaCO3(s) in water is 4.0X10^-5 M. Calculate the value of Ksp for BaCO3 can someone please walk me through this?
*May 18, 2010*

**Math**

The scale of two similar quadrilaterals is 1:3. The perimeter of the smaller quadrilateral is 90 centimeters. What is the perimeter of the larger quadrilateral?
*February 3, 2010*

**7th grade math**

what queshton
*January 6, 2010*

**11th grade**

What do you think of these unruly pirates?
*December 8, 2009*

**chemistry**

Place these hydrocarbons in order of decreasing boiling point: paraffin : methane: octane: isooctane: ( also known as 2,2,4 trimethylpentane) octadecane:
*December 6, 2009*

**math**

each expression has four 4s and equals 1. 4+4/4-4 (4+4) / (4+4) 44/44 a. Evalute the xpressions to show that they all have a value of 1. b. Make new expressions that equal each whole number from 2 to 10 for example, 4/4+4/4=2 -you may combine digits. -you can multiply, divide...
*September 22, 2009*

**9th grade**

Analogies Anemia is to blood AS concussion is to _________
*February 26, 2009*

**6th grade**

i dont get this stuff that my teacher
*September 16, 2008*

**biology**

i really, really need help!
*October 16, 2007*

**biology**

i need help!!
*October 16, 2007*

**MACROECONOMICS TERM PAPER TOPIC**

Any good TOPICS in my MACROECONOMICS PAPER???? This is a econ-101 class, and I have learned those basic concepts in macroeconomics so far. Any suggestions will be helpful. Thanks. P.S.I have a little bit thought about comparing two online search companies, GOOGLE and BAIDU, ...
*June 25, 2007*

**Calculus - Find volume of cylinder**

There is a cylindrical tank lying horizontally on the ground, its diameter is 8 feet, and length is 25 feet, the depth of the water currently in the tank is 2 feet. (1 gallon=231 cubic inches) How many gallons of water are in the tank? How many gallons of water will it take to...
*May 15, 2007*

**Social Studies Question**

what made life in Colony of New netherland harder then life in Holand?????????????????????
*February 2, 2007*

**Chemistry**

3.85 ! 10"3 dm
*January 11, 2007*

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