Friday

December 19, 2014

December 19, 2014

Number of results: 29,584

**Physics**

The determined Wile E. Coyote is out once more to try to capture the elusive roadrunner. The coyote wears a new pair of Acme power roller skates, which provide constant horizontal acceleration of 15 m/s^2. The coyote starts off at rest 70 m from the edge of the cliff. (a) If ...
*September 21, 2009 by Mary*

**maths**

A ladder lies against a wall.the top of the ladder reaches 8feet above the ground. when the ladder slips 2meters away from the wall,the top of the ladder touches the foot of the wall.then length of the wall?
*July 31, 2011 by Rohith*

**Pre Cal**

find the surface area of a box of hieght h whose base dimensions are p and q, and that satisfies either one of the following conditions: a) the box is closed. b) the box has an open top. c) the box has an open top and a square base.
*July 24, 2011 by Ashley*

**Pre-Calc-please check**

Please check this for me expand (3z-2b)^5 using Binomial Theorem (a+b)^n = n on top sigma in middle k=0 to right (n/k)a^(n-k)b^k (3a-2b)^5 = 5 on top sigma in middle k=0 on bottom(5/k)(3a)^5-k(-2b)^k (5/0)(3a)^5(-2b)^0+(5/1)(3a)^4(-2b)^1 +(5/2)(3a)^3(-2b)^2 +(5/3)(3a)^2(-2b)^3...
*January 4, 2012 by Bethany*

**HIT 105 RESEARCH PROJECT**

I don't know what to put down for the concluding section. For my introductory, I put down - The Health Insurance Portability and Accountability Act of 1996(HIPPA). The congress mandated implementation of several federal privacy protections that allows patients to have more ...
*March 2, 2009 by Alana*

**phy**

A 45 kg crate is placed on an inclined ramp. When the angle the ramp makes with the horizontal is increased to 22 deg , the crate begins to slide downward. 1-What is the coefficient of static friction between the crate and the ramp? 2-At what angle does the crate begin to ...
*July 18, 2011 by poul*

**English**

1. Half of the houses in the village were burnt down. 2. Half of the houses in the village burnt down. 3. Half of the houses in the village were burned down. 4. Half of the houses in the village burned down. ------------------ Are they grammatical? Which ones are commonly used?
*December 1, 2014 by rfvv*

**physics**

a.) A 125 kg stone has an acceleration of 84.9 m/s2. Determine the net force acting on the stone. b.) A 45 N force is acting on a 757 kg slab. Determine the acceleration of the slab. c.) A 63.2 N force acts on a block and causes an acceleration of 85.1 m/s2. Determine the mass...
*February 13, 2012 by lauren*

**PHYSICS**

AHH this problem is driving me nuts! A small container of water is placed on a carousel inside a microwave oven, at a radius of 13.5 cm from the center. The turntable rotates steadily, turning through one revolution each 6.50 s. What angle does the water surface make with the ...
*January 23, 2010 by Jen*

**English**

1. You can write everything down. 2. You can write down everything. (Are both correct?) 2-2. You can write it down. (O) 2-3. You can write down it. (X) (When the object is a pronoun, we cannot write 'write down it', right? Then, what about #2? In #2, everything is a pronoun. ...
*October 22, 2008 by John*

**science **

A big plane mirror is fixed vertically on the back of bicyce. A boy standing in front of the mirror can see his image clearly in the plane mirror. The bicycle starts moving with the sepeed of 6 ms–1 and the boy also starts running with 4 ms–1 in the direction of bicycle motion...
*January 9, 2012 by PRAMIT*

**science**

A big plane mirror is fixed vertically on the back of bicyce. A boy standing in front of the mirror can see his image clearly in the plane mirror. The bicycle starts moving with the sepeed of 6 ms–1 and the boy also starts running with 4 ms–1 in the direction of bicycle motion...
*January 9, 2012 by aaaa*

**physics**

A 10,000N car is on a roller coaster. at the top of the tallest hill (position 1) the reaches a hieght 36m above the lowest point on the roller coaster (position 2). after accelerating down the hill the roller coaster makes another (position 3) climb that rises 20m about the ...
*April 23, 2013 by shkell*

**Science**

If a truck that has a back ramp on it is going 70 miles an hour down the road, and you are traveling 75 behind it, you would soon reach it. If you were to try to get up onto its ramp, would you: A: Since you are going 75 miles an hour and it is going 70, be able to get up onto...
*March 27, 2008 by Spencer*

**Physics**

Two objects with masses 4.90 and 2.10 hang 0.800 above the floor from the ends of a cord 7.20 long passing over a frictionless pulley. Both objects start from rest. Find the maximum height reached by the 2.10 object. The heavier object will move .8 m down, the lighter will ...
*April 1, 2013 by Ben*

**phyzzzics**

I NEED ANSWERS AND HOW YOU GOT IT~!! 3. If you use a horizontal force of 30.0 N to slide a 12.0-kg wooden crate across a floor at a constant velocity, what is the coefficient of kinetic friction between the crate and the floor? 4. A force of 4.0N is large enough to overcome ...
*December 6, 2009 by johnica!*

**physics**

The top of the pool table is 2.80 ft from the top of the floor. A pool player hits the ball and it lands 14.25 ft from the edge of the table. Calculate his break speed and the speed at which the ball hit the ground
*September 11, 2012 by shawni*

**calculus**

How do I tell which curve is the top/bot or right/left? I keep getting confused about this. Is it just the right/top most intersection and the bot/left most one?
*February 3, 2013 by Daniel*

**geometry**

from the top of a vertical 186 foot cliff the angle of depression of a boat is 13 degrees(angle of depression is measured downward from horizontal) how far is the boat from the observer at the top of the cliff?
*May 20, 2014 by taylor*

**math**

Let AB be a diameter of a circular track. Tom starts from point A running clockwise on the track. At the same time Jerry starts from Point B running counterclockwise on the track. Each person runs at a constant speed. They first meet after Tom has run 200 feet. They next meet ...
*April 26, 2010 by al*

**Science: Physics**

A physics teacher shoots a .30 caliber rifle at a 0.47 kg block of wood. The rifle and wood are mounted on separate carts that sit atop an air track (like a linear air hockey table--ie. frictionless). The 5.7 kg rifle fires a 27 gram bullet at 227 m/s in the positive direction...
*January 6, 2011 by Joan*

**physics**

a 8 kg ball is thrown upward with an initial speed of 20 m/s. suppose there is a constant air resistance of 30N opposing the motion during it entire up and down path. what is the acceleration on the way up and on the way down?
*December 20, 2010 by sacrifice*

**Math**

A video recorder costs $259 and Ann pays 25 down on da purchase price. If Ann makes 6 equal payments after da down payment, wat must she pay each month?
*September 5, 2011 by Sam*

**physics**

A small steel ball bearing with a mass of 28.0 g is on a short compressed spring. When aimed vertically and suddenly released, the spring sends the bearing to a height of 1.25 m. Calculate the horizontal distance the ball would travel if the same spring were aimed 34.0 deg ...
*September 12, 2010 by Emily*

**physics**

A small steel ball bearing with a mass of 28.0 g is on a short compressed spring. When aimed vertically and suddenly released, the spring sends the bearing to a height of 1.25 m. Calculate the horizontal distance the ball would travel if the same spring were aimed 34.0 deg ...
*September 12, 2010 by Emily*

**Physics-forces**

1. a force of 250N is used to push a heavy box down the street. If the force of friction between the box and the street is 195N and the box has a mass of 60kg, what is the accleration of the box? 2.a force of 40N is applied to a 6kg box of books. If the frictional force acting...
*January 5, 2014 by Jessie*

**math trig**

A TOWER AND A MONUMENT STAND ON A LEVEL PLANE.THE ANGLES OF DEPRESSION OF THE TOP AND BOTTOM OF THE MONUMENT VIEWED FROM THE TOP OF THE TOWER ARE 13DEGREE AND 31 DEGREE,RESPECTIVELY;THE HEIGHT OF THE TOWER IS 145 FT. FIND THE HEIGHT OF THE MONUMENT.
*March 9, 2014 by mier*

**Physics Urgent**

A 3.2 kg block is hanging stationary from the end of a vertical spring that is attached to the ceiling. The elastic potential energy of this spring/mass sytem is 2.2 J. What is the elastic potential energy of the system when the 3.2 kg block is replaced by a 5.6 kg block? For ...
*April 24, 2007 by Papito*

**College Physics**

a 1200kg car coasts from rest down a driveway that is inclined 20degrees. to the horizontal and is 15m long. how fast is the car going at the end of the delivery if.... (a) friction is negligible (book answer is 10m/s) (b) a friction force of 3000n opposes the motion? (book ...
*February 23, 2010 by eddy*

**English**

Could you please check these other senteces? 1) he protagonist of the story is sentenced to death and has hallucinations. The seven tall candles on the tables first seem angels and then ghosts to him. 2) After a while, he loses consciousness but not completely, everything ...
*September 1, 2011 by Henry2*

**Physics**

A book whose mass is 3 kg is projected up a long 40 degree incline with an initial speed of 25 m/s The coefficient of kinetic friction between the book and the Mane is 0.20. (a)
*November 18, 2006 by Vv*

**pysics.**

What is the minimum work needed to push a 975 kg car 230 m up along a 17.5° incline? Assume the effective coefficient of friction retarding the car is 0.20?
*October 12, 2009 by Joe*

**physics**

a ball rolls off an incline at an angle of 30 below the horizontal at a velocity of 22m/s. how far from the base will the ball hit the floor if it lands in 3s?
*October 14, 2010 by jane*

**Physics**

Calculate the time it would take for an object to fall through a linear height equal to the objects starting height, h for a 20 degree incline.
*February 10, 2014 by Tim*

**physics**

A box with a mass of 5 kg rests on a ramp with incline of 30 degrees. Calculate the maximum static force to keep the box from sliding dawn the rope.
*February 12, 2014 by Banele*

**Physics**

A mass m1 = 4.1 kg rests on a frictionless table and connected by a massless string to another mass m2 = 5.9 kg. A force of magnitude F = 32.0 N pulls m1 to the left a distance d = 0.83 m. 1) How much work is done by the force F on the two block system? 2) How much work is ...
*January 2, 2013 by Drew*

**relativity **

A particle called neutral pi meson (or pion) decays into two photons (and nothing else).If the pion (whose rest mass is 135Mev) is initially at rest, What are the energies of the photons? How are they moving with respect to each other ?
*June 7, 2011 by walter *

**physics**

A student wearing frictionless in-line skates on a horizontal surface is pushed, from rest, by a friend with a constant force of 45 N. How far must the student be pushed, starting from rest, so that her final kinetic energy is 352 J?
*December 15, 2014 by bill*

**maths**

Can someone please help me with solving this equation (I dont know how to do it with the fractions) 1/3 x1^-2/3 . x2^2/3 -------------------- 2/3 x1^1/3 . x2^-1/3 how do I cancel out some of the terms and reduce it down so that Im left with x2 on top and x1 on bottom?? And ...
*June 2, 2007 by needhelpplease*

**physics**

A 2.00kg bullet moving at 600m/s strikes a piece of wood at rest on a frictionless table. The bullet sticks in the wood and the combined mass moves slowly down the table. a.) What is the speed of the combined mass after the collision? b.)What is the change in kinetic energy of...
*February 9, 2012 by Alex*

**PHYSICS**

ANOTHER QUICKQUESTION ABOUT THIS ONE, PLEASE HELP pete and john play a game of tug war on a frictionless icy curface. pete weighs 539 N and john weights 392 N. during the course of the game, john accelerates toward pete at a rate of 3 m/s^2. Sarah decideds to join the game as ...
*January 24, 2010 by SAMIR *

**Physics**

A stone is dropped from rest from the roof of a 100-m high building; 2.00 s after that, a second stone is thrown straight down with initial speed v0, and the second stone passes the first stone 21.6 m above ground. (a) When are the stones at the same height? (b) What was the ...
*January 23, 2013 by Help Me*

**Math**

There are 2 opaque bags, each containing red and yellow blocks. Bag 1 contains 3 red blocks and 5 yellow. Bag 2 contains 5 red and 15 yellow. To play the game, you pick a bag and then you pick a block out of the bag without looking. Would a person be more likely to pick a red ...
*December 2, 2010 by Michelle*

**TRIG Help help help test tommarow**

A TV tower stands on top of the Empire State building. From a point (on the ground) 1150 feet from the base of the building, the angle of elevation to the top of the TV tower is 52 degrees. If the building is 1250 feet tall, what is the length of the TV tower?
*May 22, 2013 by Precious*

**Math**

I need help with this problem. (Just imagine a small square with 5x-1 at the top of the square, 2x on the left side of the square and in the right hand corner of the square there is a box on the top is a 3 and on the left side is a 2.) You have to figure it out the area of ...
*March 21, 2009 by Madeline*

**physics**

A beam of protons is moving toward a target in a particle accelerator. This im trying to study for my exam by doing problems, however im stuck with this one. any help is appreciated beam constitutes a current whose value is 0.39A. (a) How many protons strike the target in 14 ...
*September 26, 2012 by Luis*

**physics help **

The pole vault landing pad at an Olympic competition contains what is essentially a bag of air that compresses from its "resting" height of 1.1 m down to 0.1 m as the vaulter is slowed to a stop. (a) What is the time interval during which a vaulter who has just cleared a ...
*November 8, 2010 by john*

**physical science**

During a rain storm, rain comes straight down with a velocity -15 m/s and hits the roof of a car perpendicularly. The mass of the rain per second that strikes the roof is .060 kg every second. Assuming that the rain cones to rest upon stiking the car (Vf =0m/s), fund the ...
*July 14, 2011 by wendell*

**physics**

sorry mr bob purlsey again to annoy you. so i did all my calculations and read about hooke's law yesterday and presented to my teacher. however i was not allowed to used hooke's law because we haven't learned it yet and i did not know how to connect potential energy to force ...
*June 14, 2007 by physics(sorry)*

**math**

A runner starts a race at the starting line. A second runner starts at 44 yards. If the first runner moves 7 yards each second and the second runner moves 3 yards each second, at what distance will the first runner catch the second runner?
*January 14, 2013 by andre*

**math fraction**

10 out of 36 students love math, 13 love science and the rest love english. write down the fraction of students who love science.
*March 29, 2012 by susy*

**calculus**

a 100 pound collar slides on a frictionless vertical rod. find the distance y for which the system is in equilibrium if the counterweight weights 120 pounds.
*May 12, 2010 by Nancy*

**general**

Which of the following would you use to sort through slides for a slide presentation? a. camera b. opaque projector c. copy machine d. light box
*December 8, 2012 by kan*

**GENERAL**

Which of the following would you use to sort through slides for a slide presentation? A. Camera B. Opaque Projector C. Copy machine D. Light box
*December 9, 2012 by khan*

**general**

Which of the following would you use to sort through slides for a slide presentation? A. Camera B. Opaque Projector C. Copy machine D. Light box
*December 9, 2012 by khan*

**Physics**

A roller-coaster car has a mass of 1170 kg when fully loaded with passengers. As the car passes over the top of a circular hill of radius 16 m, its speed is not changing. (a) What are the magnitude and direction of the force of the track on the car at the top of the hill if ...
*October 28, 2009 by joann*

**Physics**

Two horizontal forces act on a 2.4 kg chopping block that can slide over a frictionless kitchen counter, which lies in an xy plane. One force is F1 = (3.4 N) i + (3.7 N) j. Find the acceleration of the chopping block in unit-vector notation for each of the following second ...
*February 3, 2007 by COFFEE*

**Trig**

The angle of depression from the top of the building to a point on the ground is 29degrees30', the point of the ground is 36 meters from the top of the building. Find the height of the building
*November 28, 2010 by SK*

**Trig**

the angle of depression from the top of a building to a point on the ground is 32degrees30', how far is the point of the ground from the top of building if the building is 252m high?
*November 28, 2010 by SK*

**math**

From the top of a fence, the angle of depression to a flower on the ground is 72°. The top of the fence is 8 feet above the ground. How far is the flower from the bottom of the fence?
*June 20, 2011 by kenny*

**math**

the angle of depresssion from the top of a building to a point on the ground is 59 degrees. how far is the point on the ground from the top of the building if the building is 87 meters high?
*May 21, 2013 by ASHLEY*

**physcis**

biker passes a lamppost at the crest of a hill at + 4.5 m/s. she acceleratets down the hill at a constant rate of +0.40 ,/s2 for 12 seconds.\ how far does she move down the hill during this time?..
*September 18, 2012 by miguel*

**Word Problem**

A quarterback and end play on their team. From the start of a play, Pete, the end, runs down the field at about 25 feet per second. Two seconds after the play starts, Phil, the quarterback, throws the ball, at about 50 feet per second, to Pete, who is still running. I need ...
*September 17, 2007 by Lacey*

**Dynamics**

a 1500 kg automobile is traveling up to 20 degree incline at a speed of 6 m/s. if the driver wishes to stop his car in a distance of 5m, determine the frictional force at pavement which must be supplied by rear wheels
*July 30, 2012 by DHilsath*

**Dynamics**

1500 kg automobile is traveling up to 20 degree incline at a speed of 6 m/s. if the driver wishes to stop his car in a distance of 5m, determine the frictional force at pavement which must be supplied by rear wheels
*August 4, 2012 by basha*

**dynamics**

a 1500 kg automobile is traveling up to 20 degree incline at a speed of 6 m/s if the driver wishes to stop his car in a distance of a 5m, determine the frictional force at pavement which must be supplied by rear wheels.
*July 22, 2013 by Anonymous*

**Dynamics**

A 1500 kg automobile is traveling up to 20 degree incline at a speed of 6 m/s. If the driver wishes to stop his car in a distance of 5m,determine the frictional force at pavement which must be supplied by rear wheels.
*July 22, 2013 by Anonymous*

**Dynamics**

A 1500 kg automobile is traveling up to 20 degree incline at a speed of 6 m/s. If the driver wishes to stop his car in a distance of 5m,determine the frictional force at pavement which must be supplied by rear wheels.
*July 22, 2013 by Anonymous*

**English**

1. The next batter hit the ball straight up into the air. I jumped and made the catch. 2. The next batter hit the ball straight up into the air. I jumped and made a catch. 3. The next batter hit the ball straight up into the air. I jumped and caught. 4. The next batter hit the...
*May 23, 2009 by John*

**physics**

I have a diagram of a roller coaster. It starts at a height of 100m where the v=0, it then drops completely to the ground and then goes into a loop that is 75m high; the point where the loop starts is point A. From the loop, the track raises to e height of 50m (this is point B...
*March 12, 2009 by Linn*

**Physics **

7. A formula 1 racecar is capable of very quick starts (with a launch control system, that prevents the wheels from spinning during rapid acceleration)). A 2011 Ferrari (driven by none other than Agent 001) is initially at rest, and undergoes a constant acceleration of 14 m/s^...
*February 13, 2013 by Navmeet*

**calculus**

T^(1/3)=e^(r/10)m^(3/2) If the mass and radius are given as m= 2 mg and r= 5mm, and the rates of change of the temperature and radius are given as 3 deg/sec and 1 mm/sec, what is the rate of change of mass (m)?
*October 27, 2009 by drew*

**Physics please help im DESPERATE **

A small steel ball bearing with a mass of 17.0 g is on a short compressed spring. When aimed vertically and suddenly released, the spring sends the bearing to a height of 1.23 m. Calculate the horizontal distance the ball would travel if the same spring were aimed 39.0 deg ...
*February 8, 2013 by Robert *

**Physics**

The radius of curvature of a loop-the-loop for a roller coaster is 11.8 m. At the top of the loop (with the car inside the loop), the force that the seat exerts on a passenger of mass m is 0.80mg. Find the speed of the roller coaster at the top of the loop. m/s
*December 16, 2014 by Anonymous*

**Physics**

The radius of curvature of a loop-the-loop for a roller coaster is 11.8 m. At the top of the loop (with the car inside the loop), the force that the seat exerts on a passenger of mass m is 0.80mg. Find the speed of the roller coaster at the top of the loop. 1 m/s
*December 16, 2014 by Anonymous*

**physics**

The radius of curvature of a loop-the-loop for a roller coaster is 11.8 m. At the top of the loop (with the car inside the loop), the force that the seat exerts on a passenger of mass m is 0.80mg. Find the speed of the roller coaster at the top of the loop.
*December 17, 2014 by Anonymous*

**Physics**

A 0.168kg hockey puck slides at 11.4m/s. what is the work needed to stop the puck?
*February 23, 2012 by Sheetal*

**physics**

A pendulum is initially displaced to a height 1 y above the table top, as in figure 1. It is released with an initial speed of 1 v = 0 . At the lowest point of its motion, it is at a height 2 y above the table top, and with a speed of 2 v . Derive an equation of 2 v , in terms...
*August 22, 2010 by joy*

**physics**

a rock is dropped from the top of diving platform into the swimming pool below. will the distance traveled by the rock in a 0.1 second interval near the top of the flights be the same as the distance covered in a 1.1 second interval just before it hits the water? Explain?
*February 24, 2011 by jb*

**science**

Which of the following would result in the greatest erosion? A) creek flowing down a hill B) water sitting in a lake C) rain soaking into the ground D) large river flowing down a mountain
*September 12, 2011 by miki*

**math**

From 70 feet away from the base of a tree on level ground, the angle to the top of a tree is 60⁰. What is the height of the tree? What is the approximate distance from the vantage point to the top of the tree, to one decimal point? (Assume that the tree is perpendicular ...
*June 12, 2013 by D*

**Mathematics**

A Ladder AB, of length 13m, rests against a vertical wall with its foot on a horizontal floor at a distance of 5meters from the wall. When the top of the ladder slips down a distance x meters on the wall, the foot of the ladder moves out x meters. Find x. (I couldn't find this...
*March 5, 2008 by Nazharia*

**Geometry Solving a Kite Question PLEASE HELP!**

Find the variables and lengths of the sides of this kite. {top left is y-4, top right is x+5, bottom left is 2x+5, and bottom right is x+12} Thank you (:
*January 10, 2012 by sLEXANDria*

**Chemistry**

Calculate the S(univ) for the following phase change at 25 deg celcius. The boiling point of heptane is 98.0 Celcius and has a Delta Hvap= +21.6kj/mol. C7H16(l)--> C7H16(g) Delta S= +79.0j/k I know that the equation is Delta Suniv= DSsys + DSsurr PLEASE SHOW ME HOW TO DO IT...
*November 23, 2014 by Hank*

**Physics**

a bike passes a lamp post at the crest of hill at 4.5 m/s. she accelerates down the hill at the rate of 0.04 m/s squared for 12 seconds. how far does she move down the hill during this time ?
*December 13, 2012 by Dawn*

**physics**

A toy car is given a quick push so that it moves on an inclined ramp. After it is released, it moves up, reaches its highest point and moves back down again. Friction is so small it can be ignored. What net force acts on the car? A. net force of zero B. Net constant force up ...
*July 2, 2011 by alexa*

**physics- energy and work**

A 47.6-kg diver steps off a 10.82 m high diving board and drops straight down into the water. If the diver comes to rest 5.3 m below the surface of the water, determine the average resistance force exerted on the diver by the water. What is the total displacement of the diver?...
*November 12, 2014 by Hi*

**physics **

What is the minimum work needed to push a 950 kg car 890 m up along a 8.0 degree incline? Assume the effective coefficient of friction retarding the car is 0.22.
*October 10, 2011 by Luke *

**8th Grade Algebra1**

I don't understand this question, so if anyone can answer it, that would be great! We are doing motion problems, so as you probably know, the formula is d=rt. (distance equals rate times time.) We have to make a chart to answer the following question... A roller coaster goes ...
*November 7, 2008 by Nicole C.*

**social studies**

what has to do with Califoria that starts with a k
*June 9, 2008 by Andrew*

**Social Studies**

What is a letter that starts with Z?
*May 23, 2011 by Hailey*

**Math **

Jordan starts at his home and bikes along a country road. He bikes at a constant speed. Twenty minutes later he passes Stephanie's house; he knows he is 2 kilometers away from his home. Another one of his friends, Jacob lives 4 kilometers further down the same road. A) How ...
*December 4, 2012 by Jessica*

**english**

1.Identify the reason for the comma(s) in the following sentence: When you have the opportunity to interview for a job, you can improve your chances for consideration by dressing for success. a.To join two independent clauses (along with a conjunction) b.To separate an ...
*December 10, 2012 by Cynthia*

**math**

Tyrone has $60 and his sister has $135. Both get an allowance of $5 each week. Tyrone decides to save his entire allowance, but his sister spends all of hers each week plus an additional $10 each week. After how many weeks will they each have the same amount of money? Tyrone ...
*June 2, 2007 by Jenna*

**physics**

The 45-45-90 triangular prism shown in the figure has an index of refraction of 1.44, and is surrounded by air. A ray of light is incident on the left face at an angle of 46.0°. The point of incidence is high enough that the refracted ray hits the opposite sloping side. ...
*September 6, 2010 by RChanel*

**Algebra**

Need help with these 3, with work shown please--- 30. A block of ice loses one-third of its weight every hour. After 2 hours, the block weighs 40 pounds. How much did the block of ice weigh to begin with? 48. Does the Commutative Property apply to this situation? I ate dinner ...
*April 18, 2010 by mysterychicken*

**inter Alegbra**

Pick a car and find its top speed. Assuming that your chosen car reaches its top speed at the top of a ramp, leaving the ramp vertically 20 feet about the ground: 1.) When will the car land back on the ground? 2.) When would the car be traveling the fastest? 3.) When would the...
*November 14, 2010 by linda*

**Physics**

You take a ride in a fast elevator to the top of a tall building and ride back down while standing on a bathroom scale. During which parts of the ride will your apparent and real weights be the same? During which parts will your apparent weight be less than your real weight? ...
*January 14, 2013 by Billy*

**physics**

To illustrate the effect of ice on the aluminum cooling plate, consider the data shown in the drawing below. The length of the ice block is L1 = 0.00476 m and its temperature is T1 = -11.9 °C. The aluminum block is L2 = 0.00131 m long and has a temperature of T2 = -23.8 °C. ...
*April 18, 2012 by anonymous *

**Re: Physics/Math**

A 3.0 kg block, initially in motion, is pushed along a horizontal floor by a force F of magnitude 18 N at an angle = 45° with the horizontal. The coefficient of kinetic friction between the block and floor is 0.25. (Assume the positive direction is to the right.) Calculate the...
*February 10, 2007 by COFFEE*

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