Saturday

August 29, 2015
Total # Posts: 1,173

**Science**

B)Water is constantly evaporating over the ocean surface especially at the equator due to no seasonal loss in sun intensity.
*February 21, 2012*

**Math**

1. Is it more appropriate to use scientific notation for approximates or exact numbers? why? 2. In one plantation, there are 2700 young trees correct to 2 significant figures. In the other there are 830 full grown trees, correct to 2 significant figures. a) Why is it incorrect...
*February 21, 2012*

**math**

Show that the following data could not possibly be fit by an exponential function x y 3 72 5 200 7 392
*February 20, 2012*

**math**

200(1.025)^((n+1)*2) = 200(1.03)^(2n) 2(n+1)ln1.025 = 2nln1.03 (n+1)ln1.025 = nln1.03 n(ln 1.03 - ln1.025) = ln1.025 n = 5.074 years year 2006, month January
*February 19, 2012*

**Physics**

Two circuits (the figure below) are constructed using identical, ideal batteries (emf = E ) and identical lightbulbs (resistance = R). If each bulb in circuit 1 dissipates 4.00 W of power, how much power does each bulb in circuit 2 dissipate? Ignore changes in the resistance ...
*February 16, 2012*

**Physics**

About 5.12 x 104 m above Earth's surface, the atmosphere is sufficiently ionized that it behaves as a conductor. The Earth and the ionosphere form a giant spherical capacitor, with the lower atmosphere acting as a leaky dielectric. Find the capacitance C of the Earth-...
*February 16, 2012*

**Physics**

Two circuits (the figure below) are constructed using identical, ideal batteries (emf = E ) and identical lightbulbs (resistance = R). If each bulb in circuit 1 dissipates 4.00 W of power, how much power does each bulb in circuit 2 dissipate? Ignore changes in the resistance ...
*February 16, 2012*

**Physics**

Where do you get 10^6 m/s? So is the answer 22.5 or 225,000,000
*February 15, 2012*

**Physics**

Comic-strip hero Superman meets an asteroid in outer space, and hurls it at 750 m/s, as fast as a bullet. The asteroid is three thousand times more massive than Superman. In the strip, Superman is seen at rest after the throw. Taking physics into account, what would be his ...
*February 15, 2012*

**phi 103**

All dogs hate cats. Sirius is a dog. So Sirius hates cats" is an example of a
*February 12, 2012*

**Biology**

How are soldier crabs useful to us and what things are humans doing to wipe them out?
*February 12, 2012*

**Math**

We are currently studying "earning money" for math. I read this sentence: When a store claculates its profit as a percentage of its cost price the profit is always bigger than the profit calculated as a percentage of the selling price. What does it mean and please ...
*February 10, 2012*

**Physics**

An aluminum wire of diameter 2.47 mm carries a current of 12.9 A. How long on average does it take an electron to move 10.5 m along the wire? Assume 3.50 conduction electrons per aluminum atom. The mass density of aluminum is 2.70 g/cm3 and its atomic mass is 27.0 g/mol.
*February 10, 2012*

**Physics**

A silver wire and a platinum wire of the same length have the same resistance. What is the ratio of the diameter of the silver wire to that of the platinum wire. I did 10.6E-8/1.59E-8 but am not getting correct answer?
*February 10, 2012*

**Physics**

A silver wire and a platinum wire of the same length have the same resistance. What is the ratio of the diameter of the silver wire to that of the platinum wire.
*February 9, 2012*

**physics**

There is a +4 microCoulombs (ìC) charge at each of 3 corners of a square (each side 58. mm long). What is the force on +10 microCoulombs (ìC) placed at the center of the square?
*February 9, 2012*

**Economics**

-> In some countries, the role of women is not regarded in the same way as a man. How might this effect production in the country and the consequent effect on standard of living? -> The run up to the 2004 election saw the Liberal Coalition stress its economic management...
*February 9, 2012*

**About Economics**

-> In some countries, the role of women is not regarded in the same way as a man. How might this effect production in the country and the consequent effect on standard of living? -> The run up to the 2004 election saw the Liberal Coalition stress its economic management...
*February 9, 2012*

**US Government**

What is a modern day example of separation of powers at work? All I can find is the US government but I need an example of it being used not it being describe. Please help.
*February 8, 2012*

**Math**

What is the range of the following problem? f(x)=(.3)^x+2 is it (2, infinite)?
*February 8, 2012*

**Economics**

If someone said "My personal economic theory is live below my means..." what does this mean and what implications does this have for that person's economic future?
*February 8, 2012*

**physics**

An object (point mass) is projected up an inclined plane from the bottom with an initial speed of 5.0 m/s. The plane is 0.75 m high and the coefficient of kinetic friction between the object and the plane is 0.25. For what angle of inclination would the mass just come to rest ...
*February 6, 2012*

**Science**

Why do seas provide habitats with minimum temperature variation? How does turbulence of water influences the availability of gases? I read that jellyfish have form in water but collapses into a mass when placed on land, why is that? Its not really Homework i just read it from ...
*February 4, 2012*

**latin american history**

I'm trying to sum up the key policies of Juan Peron. Can you help me? I've had no luck with the internet.
*February 3, 2012*

**Chemistry**

Why is Mo(II)nitride = MoN3 and not M02N3 Also Why is PbO2 not Pb2O4 Thanks You!
*February 1, 2012*

**statisticas**

A 82% confidence interval for a sampling distribution with a mean of 100, a sample standard deviation of 24 and a sample size of 36 will be based on a á= ______ and a corresponding Zá of ____
*January 28, 2012*

**Physics**

In a cathode ray tube, electrons initially at rest are accelerated by a uniform electric field of magnitude 4.71 x 105 N/C during the first 5.49 cm of the tube's length; then they move at essentially constant velocity another 47.9 cm before hitting the screen. Find the ...
*January 26, 2012*

**physics**

Some forms of cancer can be treated using proton therapy in which proton beams are accelerated to high energies, then directed to collide into a tumor, killing the malignant cells. Suppose a proton accelerator is 4.21 m long and must accelerate protons from rest to a speed of ...
*January 26, 2012*

**trig**

not sure how to simplify tan(t+pi)/sin(t+2pi)
*January 24, 2012*

**Math**

1.89 x 10^6
*January 24, 2012*

**physics**

What is the pressure in Pascals exerted on a surface measuring 0.5 m^2 by a force of 125 N?
*January 23, 2012*

**info literacy**

what is the publisher and the number of pages for Ellison's 2002 edition of Invisible Man.
*January 21, 2012*

**physics**

A ball is thrown from a cliff upward with a speed of 20 m/s, the angle is 33 degrees and the ball hits the ground 9.2 seconds later, how high is the cliff to the nearest meter?
*January 19, 2012*

**physics**

A ball is thrown from a cliff upward with a speed of 21 m/s and at an angle of 56 degrees to the horizontal. How high does it go above the cliff to the nearest tenth of a meter?
*January 19, 2012*

**physics**

a baseball is thrown horizontally off a cliff with a speed of 27 m/s. How far has it fallen to the nearest tenth of a meter in 5.2 seconds?
*January 19, 2012*

**Physics**

a car accelerates at a constant rate from zero to 26.7 m/s in 10 seconds and then slows to 19 m/s in 5 seconds. What is its average acceleration to the nearest tenth of a m/s^2 during the 15 seconds?
*January 13, 2012*

**Physics**

how far to the nearest tenth of a meter can a runner running at 7.9 m/s run in the time it takes a rock to fall from rest 65 meters?
*January 13, 2012*

**english**

Can someone please check my little brothers work, trying to help him out.
*January 9, 2012*

**english**

Could someone check my answers please?From "When Grees Meets Greek" 1) What can you conclude from the wording of the following text? "One morning Ramkilawansingh(after this, we calling this man Ram) was making a study of the noticeboards along Westbourne Grove ...
*January 9, 2012*

**physics**

A(n) 5 g bullet is ﬁred into a 249 g block that is initially at rest at the edge of a frictionless table of height 1.7 m. The bullet remains in the block, and after impact the block lands 1.6 m from the bottom of the table. The acceleration of gravity is 9.8 m/s Find ...
*January 6, 2012*

**physics**

A(n) 5 g bullet is ﬁred into a 249 g block that is initially at rest at the edge of a frictionless table of height 1.7 m. The bullet remains in the block, and after impact the block lands 1.6 m from the bottom of the table. The acceleration of gravity is 9.8 m/s Find ...
*January 6, 2012*

**physics**

A(n) 11 g bullet is ﬁred into a(n) 111 g block of wood at rest on a horizontal surface and stays inside. After impact, the block slides 14 m before coming to rest. The acceleration of gravity is 9.8 m/s If the coeﬃcient of friction between the surface and the ...
*January 6, 2012*

**physics**

A(n) 11 g bullet is ﬁred into a(n) 111 g block of wood at rest on a horizontal surface and stays inside. After impact, the block slides 14 m before coming to rest. The acceleration of gravity is 9.8 m/s If the coeﬃcient of friction between the surface and the ...
*January 6, 2012*

**science physics**

i dont get how to solve this please help me Two resistors, 47 Ù and 82 Ù, are connected in series across a 45 V battery. What is the current in the circuit?
*January 5, 2012*

**math**

Find the coordinates of th vertex and write the equation of the axis of symmetry given the function f(x)=-x^2-3x-2.Is the vertex a maximum or a minimum?
*December 8, 2011*

**math**

Find the coordinates of th vertex and write the equation of the axis of symmetry given the function f(x)=-x^2-3x-2.Is the vertex a maximum or a minimum?
*December 7, 2011*

**Phones**

Lists of brands of phones
*December 6, 2011*

**math**

Divide the rectangles by tens and ones for each factor. Find the number of squares in each smaller square. Then add the numbers of the squares in the four rectangles : 200+40+40+8=288 So, 12x24 =288
*December 5, 2011*

**trig**

if the terminal ray of an angle 0 in standard position passes through the point (-1,3),then cos0=
*December 5, 2011*

**algebra**

What number must be added to each of the numbers 0, 8, and 32 so that they form consecutive terms of a geometric sequence? I don't understand what the question is asking first of all. The answer is 4. Help is much appreciated.
*November 28, 2011*

**Math**

20x .25
*November 27, 2011*

**Math**

I think its .. a+b+c+d/4=86 86x4=344 a+b+c+d=344 a+b+c+d+e=(88x5) a+b+c+d+e=440 440-344=96 I THINK THE ANSWER IS 96
*November 27, 2011*

**Science **

Unfortunately, I already tried google and it didn't work for me but thanks anyway.
*November 27, 2011*

**Science **

What is phenyl oxalate ester?
*November 27, 2011*

**physics**

A child spins a bucket in a vertical circle with a radius of 65 cm. The weight of the contents seems to change as bucket rises and falls along the circular path. How fast must the bucket travel at the top of the circle so the contents seem to wight 2 times their weight?
*November 20, 2011*

**physics**

the occupants of a car traveling at 25.7 m/s become weightless for an instant when traveling over the top of a hill. Calculate the radius of curvature of hill
*November 20, 2011*

**Math**

thanks
*November 18, 2011*

**Math**

What the base b1 of an Isosceles trapezoid if b2=57ft,h=17ft6inches and both legs are 23ft? or the formula for the solution?thank you.
*November 18, 2011*

**SCIENCE PLZZ HELP**

What energies out of those words at the top come from SUNLIGHT besides solar energy?
*November 14, 2011*

**SCIENCE PLZZ HELP**

solar energy comes from the sun Which 2 energies come from ATOMS? :D
*November 14, 2011*

**SCIENCE PLZZ HELP**

Out of those words which ones are energy from atoms. I only need 2 of the energy of atoms
*November 14, 2011*

**SCIENCE PLZZ HELP**

Which 6 are energy from sunlight?? nuclear energy,geothermal energy,tidal energy,fusion energy,wind,hydroelectric energy,solar energy,biomass,fossil fuels,ocean thermal,energy conversion
*November 14, 2011*

**Science**

PLEASE HELP ME? I know 1 of them is solar energy
*November 14, 2011*

**Science**

Almost all the questions above me are answered can you help me with this one??
*November 14, 2011*

**Science**

Which 6 are energy from sunlight?? nuclear energy,geothermal energy,tidal energy,fusion energy,wind,hydroelectric energy,solar energy,biomass,fossil fuels,ocean thermal,energy conversion
*November 14, 2011*

**SCIENCE**

What are some energies from sunlight??
*November 14, 2011*

**SCIENCE**

What are 6 energies from the sunlight?
*November 14, 2011*

**PHI`103**

To support a scientific hypothesis, one might
*November 12, 2011*

**algebra**

Find all numbers for which the rational expression is underfined: r^2-4r?r^2-4r
*November 9, 2011*

**physics**

A cart connected to a spring oscillates according to the following position equation: x = 0.20m cos (8 t) What is the period of this oscillation? What is the cart's velocity after 4 seconds?
*November 8, 2011*

**Math**

solve for 9x-21y=28 -9x+21y=21 in elimination method
*November 8, 2011*

**ELA**

V/CV pattern?
*November 7, 2011*

**ELA**

V/CV PATTERN MEANS LONG AND VC/V PATTERN MEANS SHORT
*November 7, 2011*

**ELA**

Sort each spelling word by determining if it follows the V/CV pattern or the VC/V pattern. Write each spelling word in the correct column. Does the word tyrant go in the V/CV pattern-long or the VC/V pattern-short? V/CV PATTERN MEANS LONG AND VC?V PATTERN MEANS SHORT
*November 7, 2011*

**English**

You have the correct syllables for the traditional Haiku form. And you have written about a scientific topic so I think you have covered your bases!
*November 2, 2011*

**Physics**

A solid disk rotates in the horizontal plane at an angular velocity of 0.036 rad/s with respect to an axis perpendicular to the disk at its center. The moment of inertia of the disk is 0.17 kg · m2. From above, sand is dropped straight down onto this rotating disk, so ...
*November 1, 2011*

**physics**

A diver in midair has an angular velocity of 6.0 rad/s and a moment of inertia of 1.2 kg·m2. He then pulls is arms and legs into a tuck position and his angular velocity increases to 12 rad/s. The net external torque acting on the diver is zero. What is his moment of ...
*November 1, 2011*

**physics**

Two skaters, one with mass 62 kg and the other with mass 45 kg, stand on an ice rink holding a pole of length 10 m and negligible mass. Starting from the ends of the pole, the skaters pull themselves along the pole until they meet. How far does the 45 kg skater move?
*November 1, 2011*

**EnglishCheck**

#1. is wrong, the correct answer is lend.
*October 30, 2011*

**Discrete Math**

Of the nine (Ann, Ben, Cal, Dot, Ed, Fran, Gail, Hal and Ida), five of them stand in a row for a picture, how many ways can this be done if Ed and Gail are standing next to each other in the picture?
*October 27, 2011*

**Science**

Organisms that maintain a constant body temperature rely on the heat produced by cells. Where does this heat come from? A) Special metabolic pathways exist just for the production of heat. B) Mitochondria produce heat in the form of ATP. C) Plants store up heat as they perform...
*October 26, 2011*

**Science**

i meant to say just "one" more
*October 26, 2011*

**Science**

yeh those are the two i narrowed it down to. You are very helpful though can I just ask you 1 more please. I think it's choice C, but I don't know really. Thank you! Organisms that maintain a constant body temperature rely on the heat produced by cells. Where does this...
*October 26, 2011*

**Science**

Thank you so much for replying, so the answer is chloroplasts?
*October 26, 2011*

**Science**

Is the answer D? Thank you The earliest atmosphere of Earth is not believed to have contained oxygen. Which cellular component would not have been useful at that time? A) chloroplast B) nucleus C) plasma membrane D) mitochondrion
*October 26, 2011*

**Social Studies **

In what building does the President of the United States serve?
*October 26, 2011*

**SOCIAL STUDIES **

U.S Capitol building?
*October 26, 2011*

**SOCIAL STUDIES **

Thanks. How about this? In what building does the Congress serve? What are they asking on this question?
*October 26, 2011*

**SOCIAL STUDIES **

Licoln,Nebraska?
*October 26, 2011*

**SOCIAL STUDIES **

What state has a southwestern border with Colorado and an eastern border with Iowa?
*October 26, 2011*

**Physics**

Nice thank you! This worked perfectly!
*October 26, 2011*

**SOCIAL STUDIES**

Im not sure im trying to find it on google and can't find the right one
*October 25, 2011*

**SOCIAL STUDIES**

Earthquakes struck New Madrid,Missouri during the winter of 1811-1812 and changed the course of what?
*October 25, 2011*

**geometry**

one a number line,the coordinates of A,B,C,and D are -5,-1,3,and 7 respectively. Find the length of the two segments and tell whether they are congruent AB and CD ,CA and DB,and BC and AD?
*October 6, 2011*

**programming**

what are application- level requirements
*October 2, 2011*

**Calculus**

Can someone tell me how to do these? Estimate INT from 0 to 1 2/(1+x^2)dx by subdividing the interval into 8 parts, using (i) the left Riemann sum: INT from 0 to 1 2/(1+x^2)dx (ii) the right Riemann sum: INT from 0 to 1 2/(1+x^2)dx (iii) the trapezoid rule INT from 0 to 1 2/(1...
*September 29, 2011*

**Calculus**

Can someone tell me how to do these? Estimate INT from 0 to 1 2/(1+x^2)dx by subdividing the interval into 8 parts, using (i) the left Riemann sum: INT from 0 to 1 2/(1+x^2)dx (ii) the right Riemann sum: INT from 0 to 1 2/(1+x^2)dx (iii) the trapezoid rule INT from 0 to 1 2/(1...
*September 28, 2011*

**Calculus**

Can someone tell me how to do these? Estimate INT from 0 to 1 2/(1+x^2)dx by subdividing the interval into 8 parts, using (i) the left Riemann sum: INT from 0 to 1 2/(1+x^2)dx (ii) the right Riemann sum: INT from 0 to 1 2/(1+x^2)dx (iii) the trapezoid rule INT from 0 to 1 2/(1...
*September 28, 2011*

**Calculus**

Can someone tell me how to do these? Estimate INT from 0 to 1 2/(1+x^2)dx by subdividing the interval into 8 parts, using (i) the left Riemann sum: INT from 0 to 1 2/(1+x^2)dx (ii) the right Riemann sum: INT from 0 to 1 2/(1+x^2)dx (iii) the trapezoid rule INT from 0 to 1 2/(...
*September 28, 2011*

**MATH**

i think this is the answer 85,700,038[i'm not sure]
*September 28, 2011*