Friday
September 4, 2015

Search: A 3.00 kg block starts from rest at the top of a 27.0° incline and slides 2.00 m down the incline in 1.50 s.

Number of results: 31,637

Math
1. What is the remainder when 2^190 is divided by 5? How do I approach these questions; do I write it down on paper, or use my calculator(how do I see the remainder?)? 2. Figure: A large right triangle, shortest base in on the ground, shorter height is vertical, longest ...
March 18, 2015 by Linda

essay info help
i'm doing an argument essay on why power plants should be shut down my college is like ten miles away from this power plant so it a very big issue in my town and i want to argue against power plants. i wrote down all my arguements, but i need help coming up with solutions ...
October 30, 2007 by julie

Physics
A loaded penguin sled weighing 60 N rests on a plane inclined at 20° to the horizontal. Between the sled and the plane the coefficient of static friction is 0.25, and the coefficient of kinetic friction is 0.18. (a) What is the minimum magnitude of the force F, parallel to the...
October 28, 2009 by Karen

Algebra
A rectangular counter top is 16 inches longer than it is wide. If the area of the counter top is 420 square inches, find the length and the width.
July 30, 2010 by Sharon

Trig
A 60 ft. antenna stands on top of a building, From a point on the ground, the angles of elevation to the top and bottom of the antenna measure 58 and 44 respectively. How tall is the building
April 5, 2011 by John

algebra
if a top of a square box has an area of 144 square inches, how long is the hypothnuse across the top of the box- need to show work,
October 6, 2011 by Lace

physics
A jogger with a mass of 66.0 kg reaches the top of a staircase in 44.0 s. If the distance from the bottom to the top of the staircase is 14.0 m, how much power will the jogger create in climbing the stairs?
April 3, 2014 by eli

Probablity
Two dice are tossed simultaneously. What is the probability that “either the sum of top faces of dice is six or both top faces are similar”?
March 24, 2015 by Ali

algrebra 1
Could you explain in detail how to do the equation (5b4n ) 2 2a6 keep in mind the 4 and 6 are small numbers on the right top corner and the parenthesis are for the numbers on top and bottom. There is a line in between the upper and lower numbers too.
January 6, 2009 by Andree

6th grade
write an expression for the area of this rectangle 20cm on the top 4cm on the right at the top and 8cm on the left.evaluate your expression to find the area.
September 20, 2009 by mahogany

Algebra
The area of the top of a triangular corner desk must be at least 7 sq. ft. If the base of the triangular desk top needs to be four feet, what should the height be?
February 6, 2011 by Melissa

algebra
The area of the top of a triangular corner desk must be at least 7 sq. ft. If the base of the triangular desk top needs to be four feet, what should the height be?
March 15, 2011 by Amy

Top Schools
Is Clarkstown North or South HS is one of the top best high schools?????? My dad wants me to go to that school after middle school if we won the lottery and move.
December 9, 2011 by Laruen

Science
A car speeds over the top of a hill. If the radius of curvature of the hill at the top is 14.27 m, how fast can the car be traveling and maintain constant contact with the ground?
November 26, 2012 by John

maths
13feet ladder is placed 5feet away from the wall . the distance from the ground straight up to the top of the mall is 13 feet. will the ladder touch the top of the mall?
October 25, 2013 by victor

math trigonometry
a post is 20 m high. the angle of elevation of top of a house which is in front of the post is 30° from its top and 45° from foot . Find the height of house and distance between them.
August 12, 2014 by nissan

phychics
for as illustrated in the diagram a cart has an initial speed 10m/s at the top of a 15-m friction track what is the speed of the cart at the top of the hill ?the acceleration due to gravity is 9.8m/s^2
August 25, 2014 by carron

physics
A proton has an initial speed of 7·105 m/s. It is brought to rest by an electric field. a.) What is the magnitude of the voltage difference needed to bring this charge to rest? answer: 365.313*7v, WHY
February 22, 2015 by dan

physics
One last question: If a 12lb. block is slowly tilted from horizontal when the plank reaches 30 degrees the block begins to slide. To find the coefficient of the static friction you take the tangent form of 30 degrees? To find the friction force you multiply the coefficient of ...
January 27, 2008 by Charles

Algebra
Bobo bought a 1 ft squared block of cheese. He needs to cut it into 3 in. cubes. The block is yellow outside but green on the inside. How many 3 in. cubes does it have? How many of the cubes have no yellow face, one yellow face, 2 yellow face, etc. Please help!!!
April 12, 2014 by Sarah

Math
Bobo bought a 1 ft squared block of cheese. He needs to cut it into 3 in. cubes. The block is yellow outside but green on the inside. How many 3 in. cubes does it have? How many of the cubes have no yellow face, one yellow face, 2 yellow face, etc. Please help!!!
April 13, 2014 by Sarah

physics
a 10.0m long bar is attached by a frictionless hing to a wall and held horizontally by a rope that makes an angle of 53 deg with the bar the bar is uniform and weights 39.9 N. how far from the hinge should a 10.0kg mass be suspended for the tension T in the rope to be 125 N
November 3, 2014 by Mike

physics
find the average of a block being propelled propelled by an elastic band. We know it is uniform acceleration. my attempt on this problem Measure the force applied of elastic band with a newton scale. The more you strecth the farther the distance the block will travel after ...
June 12, 2007 by james

Math trig
a ladder 24 feet long leans against the side of a building, and the angle between the ladder and the building is 25°. a) approximate the distance from the bottom of the ladder to the building. b)if the distance from the bottom of the ladder to the buliding is increased by ...
October 22, 2011 by jule

calculus
You are working as assistant to a major movie producer from Hollywood, but mainly you look after pre-release film publicity. You are an old hand at publicity, having worked in several production companies before. Based on previous experience you have developed a model for the ...
February 24, 2008 by maryam

Physics
A ruler stands vertically against a wall. It is given a tiny impulse at θ=0∘ such that it starts falling down under the influence of gravity. You can consider that the initial angular velocity is very small so that ω(θ=0∘)=0. The ruler has mass m= ...
December 7, 2013 by Geoff

henry ford
A rocket is fired at a speed of 74.0 m/s from ground level, at an angle of 68.0 ° above the horizontal. The rocket is fired toward an 49.8-m high wall, which is located 32.0 m away. The rocket attains its launch speed in a negligibly short period of time, after which its ...
May 25, 2015 by Anonymous

Science
On this date, the solar noon radiation values at the top of the atmospheree and at the surface at this place are 1317 WM-2 and 920 WM-2. Why is the surface value lower than the value at the top of the atmosphere?
March 9, 2009 by Mama Mia

physics
a 1000kg car goes over the top of a hill with a radius curvature equal to 40.0m. At the top of the hill the normal force is 2,500 N. How fast is the car going?
October 19, 2012 by Anonymous

Trigonometry
a 100 pound box hangs between two ropes T1 and T2 the angle at the top of T1 is 28 degrees and the angle at the top of T2 is 35 degrees. what does T1 and T2 equal? Must show work
November 15, 2013 by Jon

Physics
A wood cube 0.20m on each side has a density of 730kg/m3 and floats levelly in water. What mass has to be placed on top of the wood so that its top is just at the water level?
December 5, 2013 by HELP!!!!

math
A music stores stock of music includes new releases and top ten hits in the ratio of 3:5. How many top hits are there was n a shipment of 80. What I did,,................... 3:5 #16:*16 48:80
December 26, 2014 by ali

Chemistry
The freezing point of ethanol is -114.6 deg Celsius and its Kf value is 2.00degC/m. What is the freezing point for a solution prepared by dissolving 50.0g of glycerin in 200g ethanol? I thought it may have been using the formula deltaT=Kf*m, but I'm not sure.
February 13, 2013 by Jonah

physics
The system shown in the Figure is in equilibrium. The mass of block 1 is 2.2 kg and the mass of block 2 is 3.5 kg. String 1 makes an angle = 28o with the vertical and string 2 is exactly horizontal. what is the angle between the string that connects the masses and the string ...
April 10, 2008 by lizzy

physics
A 53.6 kg circus performer bobs up and down at the end of a long elastic rope at a rate of once every 2.80 s. The elastic rope obeys Hooke's law. Find how much the rope is extended beyond its unloaded length when the performer hangs at rest. ** I think Im missing a step when i...
November 28, 2012 by emily

Physics
Two 0.75m -long pendulums hang side by side. The masses of the pendulum bobs are 65g and 85g . The lighter bob is pulled aside until its string is horizontal and is then released from rest. It swings down and collides elastically with the other bob at the bottom of its arc.To ...
September 7, 2014 by Kayla

powerpoint
how do you type your name on the bottom of one of the slides? Which format do you use?
November 1, 2007 by anonymous

7th grade
Why was a stain used in the preparation of a yeast-cell slides
November 18, 2009 by Anonymous

Chemisrty
I need help on what exactly to put on 10-12 slides on a pwoerpoint of anders celsius?? (for 2m)
March 27, 2011 by Tiara

Chemistry
Would the R (PV=nRT)value go up or down if you had not corrected the gas for partial pressure of water? I was thinking down but im not sure
January 21, 2010 by Tina

physics
want to bring a weight of 1 kg suspended at a height of 5 feet, slowly down so that it takes 1 min to reach down.how do i make this working
November 24, 2013 by susan

increasing decreasing and more
How to analytically find the intervals on which the function y = 2x^4 - 4x^2 + 1 is 1)increasing 2)decreasing 3)concave up 4)concave down Also find any local extreme values and inflection points. Thanks. (1) The function is increasing when the first derivative dy/dx = 8x^3 - ...
November 11, 2006 by Jen

Algebra
x/(x-3)-4-(2x-5)/(x+2) If the problem is this: x/(x - 3) - 4 - (3x - 5)/(x + 2) ...find a common denominator to start. The common denominator is (x - 3)(x + 2), then convert each term using the common denominator. Here's a start: [x(x + 2)/(x - 3)(x + 2)] - [4(x - 3)(x + 2)]/(...
July 19, 2007 by Sara

year 8 math
a snail is at the bottom of an empty trough with walls 40cm high. If the snail manages to move 4cm up a wall each day, but slips 3cm each night, how long does it take the snail to reach the top of the trough? it then continues over the wall and makes it's way down to the ...
March 7, 2011 by genevieve

chemistry
The heat lost or gained by a system is related to its temperature change by a property called its heat capacity. The molar heat capacity of metals at or above room temperature equals 24.92 J/K.mol. The temperature of a block of lead (MM 207.2) was raised by 13.1 degrees when ...
September 25, 2014 by korko

physics
A 63.8 kg block of silver is at initially at 107 C. 1.0 kg of ice at its freezing point is placed onto the block to cool it. As the ice melts, the water is free to flow off (so that the water never increases in temperature). After all the ice melts, what is the final ...
November 24, 2014 by sara

Physics
A 3.40 kg block of copper at a temperature of 74 °C is dropped into a bucket containing a mixture of ice and water whose total mass is 1.20 kg. When thermal equilibrium is reached the temperature of the water is 14 °C. How much ice was in the bucket before the copper block was...
April 23, 2015 by Jennifer

Chemistry
Sulfuric acid dissolves aluminum metal according to the following reaction: 2Al(s)+3H2SO4(aq)→Al2(SO4)3(aq)+3H2(g) Suppose you wanted to dissolve an aluminum block with a mass of 14.5g . 1.) What minimum mass of H2SO4 would you need? 2.)What mass of H2 gas would be ...
March 29, 2015 by Katie

posting again! please help!! physics
A skateboarder, starting from rest, rolls down a 14.0-m ramp. When she arrives at the bottom of the ramp her speed is 7.40 m/s. (a) Determine the magnitude of her acceleration, assumed to be constant. (b) If the ramp is inclined at 20.5° with respect to the ground, what is the...
October 6, 2010 by michelle

physics 2 help please!
The space probe Deep Space 1 was launched on October 24, 1998. Its mass was 474 kg. The goal of the mission was to test a new kind of engine called an ion propulsion drive. This engine generates only a weak thrust, but it can do so over long periods of time with the ...
February 10, 2011 by Hannah

PHYSICS
Two parallel METAL rods form a plane inclined at 20.0° to the horizontal. The upper end of the rods are connected together by a resistor of 118.0 Ω. The lower end of the rods are held in an ELECTRICALLY INSULATING block. They are separated horizontally by a distance of 20...
November 29, 2014 by Khuan

Calculus
A 15 ft ladder is placed against a vertical wall. the bottom of the ladder is sliding away from the wall at a rate of 2 ft/sec. How fast is the top of the ladder sliding down the wall when the bottom of the ladder is 9 ft from the wall?
February 28, 2013 by Trevor

Physic II
If a small amount of a substances that is at 50 deg C is placed in a large insulated room,what will the final temp. of the substances be? will heat transfer to the room take place? will the room temp. go up?
April 8, 2014 by Huliney2

trigonometry
A Wheel of radius 14in. is rotating 0.5 rad/sec. What is the linear speed v, the angular speed in RPM ( rev per min), and the angular speed in deg/sec?
April 8, 2015 by Dan

physics
You are 1.7m tall and your eyes are 8cm from the top of your head. How tall must a vertical plane mirror be to see your entire length? Also how far from the ground is the top of the mirror?
April 28, 2008 by shan

geo
a carpenter cut the top section of window frame with a 32 degree angle on each end. The side peices hav an angle of 49 degreese at the top will the side pieces be parallel
December 1, 2011 by shane

trig
Imagine that you are sitting 6 feet away from a television that is hung on a wall. The top of the TV is 8 feet off the ground. Which function correctly represents the angle that you make with the top of your television?
August 15, 2012 by Alex

math
there was a problem on the test that had 89___89 but there was a line on top of both numbers. what does it mean also they had 95___96 with the line on top aswell and i dont know if i need to round them
April 10, 2013 by Anonymous

Math
The Leaning tower of pisa is 55.9m tall and leans 5.5 degrees from the vertical. If its shadow is 90.0m long, what is the distance from the top of the tower to the top of the edge of it’s shadow? Assume that the ground is level.
April 8, 2015 by Jade

physics
A lighthouse standing on the top of a cliff is observed from two open boats (boats are not decked over) A and B in a vertical plane through the light house. The angle of elevation of the top of the lighthouse viewed from B is 16 degrees and the angles of elevation of the top ...
July 20, 2013 by Romar

Physics
Bob starts spinning his hammer at a rate of 2.00 rad/s^2. At the same time, he starts running towards Jim at 4.00 m/s^2. The distance from the end of the hammer to Bob's elbow is 1.20 m. If Bob takes 3 seconds before he launches the hammer at Jim, what is the resultant ...
March 4, 2015 by Lisa

Physics
A bead slides without friction around a loop–the–loop (see figure below). The bead is released from rest at a height h = 3.60R. (a) What is its speed at point ? (Use the following as necessary: the acceleration due to gravity g, and R.) v = So I can't get this. I know the form...
March 11, 2013 by Anonymous

Physics
A bead slides without friction around a loop–the–loop (see figure below). The bead is released from rest at a height h = 3.60R. (a) What is its speed at point ? (Use the following as necessary: the acceleration due to gravity g, and R.) v = So I can't get this. I know the form...
March 11, 2013 by Anonymous

algebra 2
Pete and Kathy are standing at home on a softball field. Pete starts walking up the third base line at the rate of 6 feet per second. At the same time, Kathy starts jogging up the first base line at the rate of 10 feet per second. In how many seconds will they be 270 feet apart?
October 5, 2008 by mike

math
A race car driver starts along a 50-mile race course traveling at an average speed of 90 mph. Fifteen minutes later a second driver starts along the same course at an average speed of 120 mph. Will the second car overtake the first car before the drivers reach the end of the ...
July 28, 2011 by Anonymous

chemistry
The heat of fusion of water is 335 J/g, the heat of vaporization of water is 2.26 kJ/g, and the specific heat of water is 4.184 J/deg/g. How many grams of ice at 0 ° could be converted to steam at 100 °C by 9,946 Joules of heat?
November 15, 2013 by Dakota

physics
A child pulls a 13 kg sled across the snow at a constant 1.6 m/s [N] applying a force of 51 N [N 25 deg U]. How much work have they done after pulling for 44 m? Round answers to the nearest whole number. m=13kg Vcon=1.6m/s F=51N d=44 cos theta=25 W=Fdcostheta? I don't know how...
November 14, 2014 by me

physics
Initially a small car and a truck are at rest then the car starts pushing a dead battery truck and they both accelerate. Which of the following statement is true? a)The car exerts a larger force on the truck than the truck exerts on the car. b) The car exerts the same amount ...
November 4, 2011 by Cindy

Physics
A crate sets on wooden horizontal surface (a wooden floor). The figure shows a top view of this looking down onto the crate (gravity would be acting into the page). Man one and man two apply forces F1 and F2, at angles of θ1 and θ2 respectively, with the goal of ...
October 9, 2014 by Johnny

Physics
A battery with voltage drop of 120V is connected in a ciruit containing both series and parallel. Moving in a clockwise direction. R1= 3 ohms. Suddenly there is a connection of point A to point B. In between these two points is a parallel circuit with R2= 10 ohms and R3=2ohms ...
March 26, 2008 by Andrea

trigonometry
A 36 ft. ladder is used to reach the top of 28ft. wall. If the ladder extends 2 ft. from the top of the wall, find its inclination to the horizontal.
August 11, 2010 by Winsel

physics
A 4.5 kg can of paint is sitting on top of a 0.8 meter high step ladder. How much work did you do to move the can of paint to the top of the ladder?
December 15, 2010 by Josue

physics
A cat that has a mass of 6 kg climbs to the top of a tree that is 20 m high. How much potential energy does the cat have at the top of the tree?
January 26, 2012 by Jay

math
John and Susan hiked up an 18-mile mountain trail at 5mph. They hiked down at 4mph. How long did the hike take? Up time = 18 miles/5 mph Down time = 18 miles/4 mph Compute and add the two times. Most people go up mountains slower than they come down. They must be unusual ...
May 14, 2007 by Marie

intermidiate algebra
pick a car find its top speed. Asusuming that your chosen car reaches its top speed at the top of a ramp, leaving the ramp vertically 20 feet about the ground? 2. When would the car be traveling the fastest? 3.)When would the car be traveling the slowest? 4.) based on the ...
November 14, 2010 by linda

physics
A car starts from rest and travels for t1 seconds with a uniform acceleration a1. The driver then applies the brakes, causing a uniform acceleration a2. If the brakes are applied for t2 seconds, determine the following. Answers are in terms of the variables a1, a2, t1, and t2...
February 2, 2011 by Anonymous

Chemistry
This question seems too simple to me but i was just wondering if someone could help me with it? 8 a) Explain why the first ionisation energy values for the Group 1 elements become less positive as you go down the group? I have done this part it's b which is what I would like ...
November 3, 2011 by Carol

Math (Combinatorics)
In the plane, the points with integer coordinates are called lattice points. Suppose a flea in the plane jumps from one lattice point to another. Each jump is one unit to the right, one unit to the left, one unit up, or one unit down. If the flea starts at the origin and makes...
April 29, 2013 by Bob

Math (Combinatorics)
In the plane, the points with integer coordinates are called lattice points. Suppose a flea in the plane jumps from one lattice point to another. Each jump is one unit to the right, one unit to the left, one unit up, or one unit down. If the flea starts at the origin and makes...
May 1, 2013 by Hale

physics (mechanics)
Practice problem: A rocket sled for testing equipment under large accelerations starts at rest and accelerates according to the expression: a= (2.8 m/s^3)t + (3.9 m/s^2) How far does the rocket move in the time interval t=0 to t=0.81 s? This is just a practice problem to help ...
August 28, 2010 by John

Math
Shirley is on a ferris wheel which spins at the rate of 3.2 revolutions per minute. The wheel has a radius of 45 feet, and the center of the wheels is 59 feet above the ground. After the wheel starts moving. Shirley takes 16 seconds to reach the top of the wheel. How high ...
November 28, 2009 by SC

dynamics
Find the mass center of a cylinder with height L and a hemisphere glued to the top with radius R. L=2R. The cylinder is standing up on its bottom end with hemisphere on top. Im so lost on this and cant use the formula to work.
February 8, 2009 by spencer

Physics
Although it can't sustain its top speed for more than 8.65 sec, the cheetah can run a distance of 274 m during that time. If a cheetah with a mass of 50.0 kg is moving north at its top speed. what is its momentum?
November 4, 2009 by abbigail

Physics
I listed the questions with my answers. Are the answers correct? Thanks. A railroad locomotive is a rest with its whistle shrieking, and then it starts moving toward you. a.) Does the frequency that you hear increase, decrease, or stay the same? The frequency of the waves ...
October 17, 2009 by Mary

physics, please help
A 63.8 kg block of silver is at initially at 107 C. 1.0 kg of ice at its freezing point is placed onto the block to cool it. As the ice melts, the water is free to flow off (so that the water never increases in temperature). After all the ice melts, what is the final ...
November 24, 2014 by sara

physics
You and your friend are on the roof of a 20 m tall building investigating a free fall. Your friend releases a small rock from rest. You throw another rock simultaneously with your friend aiming it straight down. (a) What initial speed should you supply to the rock so it hits ...
September 28, 2014 by Jane

AP English Lit
Hi, I was wondering what kind of poem "Dream Variations" by Langston Hughes is? I've narrowed it down to blank verse or free verse but I'm not sure. Please help. Here is the poem: Dream Variations To fling my arms wide In some place of the sun, To whirl and to dance Till the ...
May 21, 2013 by Kate

math
first question: could x^5-1 simplified? what is the limit of cuberoot(x^2-5x-4) as x approaches 4? For the first one: could x^5-1 simplified? Yes, the expression can be factored as the 5th roots of unity. First, divide it by (x-1) to get (x^5-1)=(x-1)*4th deg poly. I'm not ...
September 3, 2006 by .

Physics
Can you show work please..? 1. Joe is sledding down a snow hill when he collides with Mike half way down the hill. Joe and the sled have a mass of 65 kg and their velocity before the collision was 12 m/s. If Mike has a mass of 55 kg, what velocity would Joe, Mike, and the sled...
January 16, 2011 by Amy

cal
A conical tank (with vertex down) is 12 feet across the top and 18 feet deep. If water is flowing into the tank at a rate of 18 cubic feet per minute, find the rate of change of the depth of the water when the water is 10 feet deep. I got 81/200pi ft/min.
November 2, 2013 by tony

Physics
Problem 3- A 12 kg stone slides down a snow-covered hill, leaving point A with a speed of 10 m/s . There is no friction on the hill between points A and B, but there is friction on the level ground at the bottom of the hill, between B and the wall. After entering the rough ...
December 12, 2013 by Anonymous

physics help
A 1100 kg automobile is at rest at a traffic signal. At the instant the light turns green, the automobile starts to move with a constant acceleration of 3.0 m/s2. At the same instant a 2800 kg truck, traveling at a constant speed of 8.0 m/s, overtakes and passes the automobile...
March 26, 2010 by beav

Physics - sound waves
I listed the questions with my answers. Are the answers correct? Thanks. A railroad locomotive is a rest with its whistle shrieking, and then it starts moving toward you. a.) Does the frequency that you hear increase, decrease, or stay the same? The frequency of the waves ...
October 17, 2009 by Mary

Calculus
F(x) = x^3 / (x-16) is concave up and down on what intervals? I got the derivative to be f' = (x^4 - 48) / (x^2-16)^2 and I found the local min and max but now I need to find where it concaves up and down.
October 27, 2009 by Z32

Physics
A 2kg mass, initially at rest, is shot from a spring (k=550N/m) which is compressed by 1.3m. The 2kg mass hits a stationary 6kg mass (the actual collision lasts 0.02seconds). After the collision the 2kg mass is travelling 11m/s to the left. To the right of the 6kg mass is a ...
January 22, 2013 by Sydney

physics
Two blocks of masses m1 = 4.00 kg and m2 = 3.00 kg are placed in contact with each other on a frictionless horizontal surface. A constant force F = 9.00 N is applied to the block of mass m1. a) Determine the magnitude of the acceleration of the two-block system. b) Determine ...
February 11, 2012 by michael

physics
A boy coasts down a hill on a sled, reaching a level surface at the bottom with a speed of 6.9 m/s. If the coefficient of friction between the sled's runners and snow is 0.045 and the boy and sled together weigh 580 N, how far does the sled travel on the level surface before ...
February 21, 2013 by Anonymous

physics
A boy coasts down a hill on a sled, reaching a level surface at the bottom with a speed of 6.2 m/s. If the coefficient of friction between the sled's runners and snow is 0.060 and the boy and sled together weigh 480 N, how far does the sled travel on the level surface before ...
March 4, 2013 by crystal

physics
An air rifle pellet accelerates from rest to 100m/s-1 whilst travelling down the barrel of the air rifle. If the barrel of the air rifle is 0.6m long, What is the acceleration of the pellet?
August 25, 2008 by Katie Klark

Geology
Can someone please look this over and let me know if I described the Plate Tectonic Theory? Thanks. Write a 200-300-word summary about two historical figures and the process of mantle convection and plate movement. Two historical figures that contributed to the plate tectonic ...
April 8, 2009 by A.W.

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