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May 28, 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: 31,192

physics
A piece of wood with mass m = 2.8 kg is held in a vise sandwiched between two wooden jaws as shown in the figure below. A blow from a hammer drives a nail which exerts a force of 440 N on the wood. If the coefficient of static friction between the wood surfaces is 0.66, what ...
October 3, 2013 by holly

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
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

phys
A 10.9-g iron bullet with a speed of 4.00 102 m/s and a temperature of 20.0 C is stopped in a 0.400-kg block of wood, also at 20.0 C. (a) At first all of the bullet's kinetic energy goes into the internal energy of the bullet. Calculate the temperature increase of the bullet...
April 26, 2012 by opp

Chemistry
Can you check if this is correct please: Reactivity order for these metals (top being most reactive): - Magnesium (I'm not sure if Magnesium or Manganese should be at the top) - Manganese - Zinc - Copper Reactivity order for these acids (top being most reactive): - Sulfuric ...
October 9, 2011 by Franky

Chemistry
Can you check if this is correct please: Reactivity order for these metals (top being most reactive): - Magnesium (I'm not sure if Magnesium or Manganese should be at the top) - Manganese - Zinc - Copper Reactivity order for these acids (top being most reactive): - Sulfuric ...
October 9, 2011 by Franky

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

physics
A basketball player is balancing a spinning basketball on the tip of his finger. The angular velocity of the ball slows down from 18.0 to 14.7 rad/s, during the slow down the angular displacement is 85.4 rad. Determine the time it takes for the ball to slow down.
April 13, 2013 by anonymous

physics
A ferris wheel rotates at an angular velocity of .036 rad/s. At t=0min your friend Seth is at the very top of the ride. What is Seth's angular position at t=3 min, measured counterclockwise from the top?
June 14, 2010 by Sarah

Physics
The track near the top of your favorite roller coaster has a circular shape with a diameter of 36 m. When you are at the top, you feel as if you weigh only one-fifth of your weight on the ground. What is the speed of the roller coaster?
June 25, 2012 by Sierra

Physics
The track near the top of your favorite roller coaster has a circular shape with a diameter of 36 m. When you are at the top, you feel as if you weigh only one-fifth of your weight on the ground. What is the speed of the roller coaster?
June 25, 2012 by Sierra

maddison parish
How long must a ladder be to reach the top of a 20' wall if the ladder and the wall form a 32 angle (at the top)?
September 20, 2010 by James Gorgon

Physics
how much work is required to lift a 98-N block of ice if A) it is lifted a vertical distance of 5-m.? B) you push the same block of ice up a 7-m long ramp using in acompare to the work required in b.? C) How does the work required in A compare to the work required in B.? D) ...
November 7, 2010 by Tyler

physics
A car travels at 107 km/h on a level road in the positive direction of an x axis. Each tire has a diameter of 74.0 cm. Relative to a woman riding in the car and in unit-vector notation, what are the velocity at the (a) center, (b) top, and (c) bottom of the tire and the ...
October 31, 2012 by Alexander

calculus
A 20 ft ladder is leaning against the side of a house. If the bottom of the ladder is moving away from the house at the rate of 2 feet per second, how fast is the top of the ladder moving down the wall when the bottom of the ladder is 12 feet from the house
March 16, 2011 by Diana

physics
A 3.6 kg rock is initially at rest at the top of a cliff. Assume that the rock falls into the sea at the foot of the cliff and that its kinetic energy is transferred entirely to the water. How high is the cliff if the temperature of 1.1 kg of water is raised ...
February 12, 2015 by Anonymous

Algebra
When you're breaking down the square root in the quadratic formula into several parts- say it was the originally the square root of 80 so you break it down to square root of 4 and square root of 20-would the results be added or multiplyed? Because I know when you further break...
October 5, 2009 by Peter

Math
Brilli the ant has a block of cheese that is in the shape of an equilateral triangle. She is hosting a party, and has invited her two-legged house mates. She insists that all of her guests get a piece of cheese that is in the shape of an isosceles triangle. What is the maximal...
July 15, 2013 by Mark

Math
Brilli the ant has a block of cheese that is in the shape of an equilateral triangle. She is hosting a party, and has invited her two-legged house mates. She insists that all of her guests get a piece of cheese that is in the shape of an isosceles triangle. What is the maximal...
July 16, 2013 by Mark

Medical
Can some one please tell me all the: adjectives adverbs conjunctions nouns prepositions pronouns verbs - in this paragraph? please! Thank you. The patient was brought to the operating room and Bier block anesthesia was performed. The right upper extremity was prepped and ...
February 2, 2015 by Rebecca

English
1. You may have a jellyfish at the right top in the picture. 2. You may have a jellyfish at the top right in the picture. 3. You may have a jellyfish on the right top in the picture. 4. You may have a jellyfish on the top right in the picture. 5. You may have a hawkfish in a ...
August 29, 2009 by John

physics
A block of wood weighing 10newton is placed on the horizontal table,it is then pulled by means of a spring balance attached to one of its ends,the block just begins to move when the spring balance records the horizontal force 5newton.what is the coefficient of static motion ...
November 24, 2011 by pearl

Physics
I got part a and b, but not c. We are trying to find delta T in part c, but I'm still confused on where to start even with the help. (a) An iron block of the mass 1.2 kg is suspended on a spring of the spring constant 140 N/m, and merged into a vessel with 5 liters of water. ...
December 3, 2010 by Susan

physics
A 4.74 kg spherical ball with radius 1.4 cm rolls on a track with a loop of radius 39 cm that sits on a table 1.2 meters above the ground. The last 1 meter section of the track is horzontal and is not connected to the rest of the track. 0.33 meters of this section of the track...
December 21, 2008 by jeff

Physics
A 15.3 kg block is dragged over a rough, horizontal surface by a constant force of 130 N acting at an angle of 26.4◦ above the horizontal. The block is displaced 16 m, and the coefficient of kinetic friction is 0.1. Find the work done by the 130 N force. The acceleration...
December 10, 2014 by gababa

physics
A 20.0-m tall hollow aluminum flagpole is equivalent in strength to a solid cylinder 4.00 cm in diameter. A strong wind bends the pole much as a horizontal force of 900 N exerted at the top would. How far to the side does the top of the pole flex?
April 8, 2013 by meme

college physics
Two blocks of mass m1 = 3.00 kg and m2 = 7.50 kg are connected by a mass less string that passes over a frictionless pulley. The inclines are frictionless. So this is like a triangle with a pulley at the top and both blocks resting at either side of the pulley each at a 35 ...
May 23, 2012 by kathy

Physics
The Spent Rocket Parts: During launches, rockets often discard parts. A certain rocket starts from rest on the launch pad and accelerates upward at a steady 3.3 m/s2. When it is 235 m above the launch pad, the rocket discards a used fuel canister by simply disconnecting it. ...
November 20, 2012 by Zalak

English
1. The shop is two blocks away form this post office. 2. The bakery is at the corner one block away form the flower shop. 3. The ware house is between the two buildings one block away form the book shop. ------------------ Are they all grammatical? Would you check them? Thank ...
May 18, 2015 by rfvv

Physics- pls help
A 5kg object starts at rest and has a force applied to it of 10 Newtons for 2 seconds, followed by 20 Newtons for 2 seconds, followed by 30 newtons for 2 seconds, all in the same direction. a. Determine its final velocity b. Sketch a graph of force vs time c. Create a ...
November 1, 2010 by sally

physics
A roller-coaster car with a mass of 550 kg starts at rest from a point 46 m above the ground. At point B, it is 23 m above the ground. [Express your answers in kilojoules (kJ).] (a) What is the initial potential energy of the car? Incorrect: Your answer is incorrect. . kJ (b) ...
September 28, 2013 by Tammy

physics
In the figure we see two blocks connected by a string and tied to a wall, with theta = 33. The mass of the lower block is m = 1.0 kg; the mass of the upper block is 2.0 kg. The tension of the string connecting the blocks is 5.337. Find the tension in the string that is tied ...
July 28, 2010 by Kate

Physics
Two blocks (M1 = 2.57 kg and M2 = 6.71 kg) are in contact on a frictionless, horizontal tabletop. An external force, $\vec{F}$, is applied to block 1, and the two blocks are moving with a constant acceleration of 2.59 m/s2. What is the contact force between the blocks? What is...
September 22, 2013 by Lyra

physics
A discus thrower (with arm length of 1.2 m) starts from rest and begins to rotate counterclockwise with an angular acceleration of 3.0 rad/s2. (a) How long does it take the discus thrower's speed to get to 4.5 rad/s? (b) How many revolutions does the thrower make to reach the ...
March 17, 2011 by HELP!!!!

Physics
A discus thrower (with arm length of 1.2 m) starts from rest and begins to rotate counterclockwise with an angular acceleration of 3.6 rad/s2. (a) How long does it take the discus thrower's speed to get to 5.1 rad/s? (b) How many revolutions does the thrower make to reach the ...
June 14, 2012 by James

physics
A discus thrower (with arm length of 1.2 m) starts from rest and begins to rotate counterclockwise with an angular acceleration of 1.8 rad/s2. (a) How long does it take the discus thrower's speed to get to 3.4 rad/s? (b) How many revolutions does the thrower make to reach the ...
October 17, 2012 by Marwan

Science.
1. Under which of the following conditions would a fossil most likely form? A living thing dies and sediment is very slowly deposited on top of its body. A living thing dies and sediment quickly covers its body. A living thing dies and its skeleton is left exposed to the ...
December 13, 2013 by Princess Anna

geology
1. What fraction of the Earth is made up of each of the major compositional layers: core, mantle, and crust? 2. What cities lie the same distance from our town as the boundaries of the following layers in the Earth lie from the solid surface? a. Base of oceanic crust or top of...
September 3, 2008 by student01

Physics
A bungee jumper with mass 61.3 kg jumps from a high bridge. After reaching his lowest point, he oscillates up and down, hitting a low point eight more times in 31.8 s. He finally comes to rest 25.3 m below the level of the bridge. Calculate the spring constant of the bungee ...
November 27, 2011 by Maggie

physics
A golf ball is dropped from rest from a height of 8.20 m. It hits the pavement, then bounces back up, rising just 5.40 m before falling back down again. A boy then catches the ball when it is 1.40 m above the pavement. Ignoring air resistance, calculate the total amount of ...
September 8, 2012 by tom

physics
A golf ball is dropped from rest from a height of 8.20 m. It hits the pavement, then bounces back up, rising just 5.40 m before falling back down again. A boy then catches the ball when it is 1.40 m above the pavement. Ignoring air resistance, calculate the total amount of ...
September 8, 2012 by andy

physics
A golf ball is dropped from rest from a height of 9.60 m. It hits the pavement, then bounces back up, rising just 5.30 m before falling back down again. A boy then catches the ball when it is 1.11 m above the pavement. Ignoring air resistance, calculate the total amount of ...
September 17, 2012 by Anonymous

physics
A golf ball is dropped from rest from a height of 8.40 m. It hits the pavement, then bounces back up, rising just 5.30 m before falling back down again. A boy then catches the ball when it is 1.20 m above the pavement. Ignoring air resistance, calculate the total amount of ...
September 18, 2012 by gary

Physics
A girl coasts down a hill on a sled, reaching a level surface at the bottom with a speed of 6.7 m/s. The coefficient of kinetic friction between runners and snow is 0.038, and the girl and sled together weigh 603 N. The acceleration of gravity is 9.8 m/s2 . How far does the ...
November 5, 2014 by Kayla Johnson

Physics
A 50.0 kg diver steps off a diving board and drops straight down into the water. The net force when in the water is an upward 1450 N. If the diver comes to rest 5.0 m below the water's surface, what is the total distance between the diving board and the diver's stopping point ...
March 9, 2011 by Becky

Physics
A coefficient of kinetic friction, k , is needed to stop a car in a distance D on dry pavement with the wheels locked if the car starts from speed V_0. What coefficient of kinetic friction (in terms of k ) is needed to stop this car in the same distance if it starts from an ...
February 19, 2008 by Jose

physics
While standing on a bridge 15.0 m above the ground, you drop a stone from rest. When the stone has fallen 3.10 m, you throw a second stone straight down. What initial velocity must you give the second stone if they are both to reach the ground at the same instant? Take the ...
January 31, 2010 by Anonymous

physics
While standing on a bridge 15.0 m above the ground, you drop a stone from rest. When the stone has fallen 3.10 m, you throw a second stone straight down. What initial velocity must you give the second stone if they are both to reach the ground at the same instant? Take the ...
January 31, 2010 by brittany

physics
While standing on a bridge 15.0 m above the ground, you drop a stone from rest. When the stone has fallen 5.00 m, you throw a second stone straight down. What initial velocity must you give the second stone if they are both to reach the ground at the same instant? Take the ...
September 9, 2010 by bethany

physics
While standing on a bridge 30.0 m above the ground, you drop a stone from rest. When the stone has fallen 3.20 m, you throw a second stone straight down. What initial velocity must you give the second stone if they are both to reach the ground at the same instant? Take the ...
January 26, 2013 by brizett

math
a string of lights is strung from the top of a fence post that = 4 ft tal flagpole=16 ft tall. the fence post=9 ft tall from the flagpole what's the length of the string of lights from the top of the post to the top of the pole? /
March 23, 2009 by brianna

Physics
A truck on a straight road starts from rest and accelerates at 2.8 m/s^2 until it reaches a speed of 16 m/s. Then the truck travels for 16s at constant speed until the brakes are applied,stopping the truck in a uniform manner in an additional 3.6 s. How long is the truck in ...
September 9, 2014 by Isaac

physics
A mass with an initial combined potential energy and kinetic energy of 10,000 joules is dropped onto a fence post to drive it into the ground. The post is driven 0.25 meters into the ground before it comes to rest with the mass sitting on top of the post. How much work was ...
January 24, 2012 by Charles

College Trigonometry
From a point 200 yards from the foot of a building, the angle of elevation to the top of the building is 37 degrees. Find the measure of the angles of the triangle formed by the building, the ground, and the line of sight to the top of the building?
January 16, 2013 by Marie

physics
a father pulls his young daughter on a sled with a constant velocity on a level surface through a distance of 10-m, if the total mass of the sled a the girl is 35-kg and the coefficent of kinetic friction between the sled runners and the snow is 0.20, how much work does the ...
January 26, 2008 by melissa

physics help
A car travels at 80 km/h on a level road in the positive direction of an x axis. Each tire has a diameter of 66 cm. Relative to a woman riding in the car and in unit-vector notation, what are the velocity at the (a) center, (b) top, and (c) bottom of the tire and the magnitude...
April 15, 2010 by beav

business finance
You have saved $15,000 for down payment on a car costing $55,000, and plan to finance the rest with a 5-year loan. The dealer is offering you a loan with a monthly payment of $1,050. What effective annual rate of interest is the dealer charging on the loan
February 23, 2014 by sakiss

physics
A 4.2 kg rock is initially at rest at the top of a cliff. Assume that the rock falls into the sea at the foot of the cliff and that its kinetic energy is transferred entirely to the water. How high is the cliff if the temperature of 1.5 kg of water is raised ...
February 13, 2012 by Anonymous

physics
A box of mass 65 kg hangs motionless from two ropes, as shown in the diagram above. The angle is 40 degrees. Choose the box as the system. The x-axis runs to the right, the y-axis runs up, and the z-axis is out of the page. What is the y-component of the gravitational force ...
January 17, 2011 by freddy

Calculus
A fence is 1.5m high and is 1m from a wall. A ladder must start from the ground, touch the top of the fence, and rest somewhere on the wall. Calculate the minimun lenght of the ladder. I drew a diagram and i ended up with a right angle triangle. i made the hypotenuse the ...
April 10, 2010 by lala

maths
find the radius of the circle if length of arc is 4p cm and angle made by the arc at the centre is 40 deg.find the area made by the arc.
February 23, 2013 by urvashi

Physics
A 58-kg vampire and 176-kg werewolf clash during the Feat of Strength part of the annual celebration of Festivus. The werewolf velocity just before the clash is 7 m/s and is directed upwards, while the vampire velocity at the moment of the collision is 12m/s and is directed ...
November 1, 2012 by Emily

English
Thank you very much for all your explanations. I still have a few doubts. I included two sentences you have already checked. I just wanted to be sure I used the best alternative. 1) They cut off our gas, light, and phone because we didn't pay the bills. 2) I fell off my bike ...
February 27, 2012 by Henry2

Maths / physics
Calculate the rest mass (In grams) of an object whose rest energy is equal to the energy released by a tonne of tnt the energy liberated by 1 g of tnt = 4kJ Rest energy = moc 2 1 tonne of tnt equals 10^6 x 4kJ = 4 x 10^6 kJ x (3.0^8)sqrd = 3.6 x 10^23kJ is this right ?? i ...
August 27, 2013 by Wayne

Physics
An objectis thrown upward from the edge of a tall building with a velocity of 10m/s. Where will the object be 3s after it is thrown? Take g = 10m/s^2 15m above the top of the building 30m below the top of the building 15m below the top of the building 30m above the building
October 13, 2011 by Lawrence

physics
A 73kg human sprinter can accelerate from rest to 12m/s in 2.7s . During the same interval, a 27kg greyhound can accelerate from rest to 19m/s .
June 23, 2013 by Anonymous

math
the coaches made the players run sprints down the football field to get in shape. the running backs had to run down the field 6 3/4 times. the linemen had to run down the field 6 5/8 times. Which group ran more?
April 24, 2014 by monta

math (algerbra)
A bricklayer's assistant starts building a wall, laying 50 bricks per hour. Two hours later the master comes and lays down 80 bricks per hour. x= number of hours since the assistant has been laying. Qusestion-------- Write expressions for the number of bricks the assistant has...
November 11, 2007 by Erin W!!!!!!

physics
A rocket is fired at a speed of 70.0 m/s from ground level, at an angle of 40.0 above the horizontal. The rocket is fired toward an 14.0-m high wall, which is located 21.0 m away. The rocket attains its launch speed in a negligibly short period of time, after which its ...
October 9, 2012 by Anonymous

math
5 sq ft= ___ in I have that this converts to 720 square inches but cannot convert it down to inches. I have no clue how to break this down to inches since square deals with area and we don't know the sides. Is it possible to break this down to inches?
January 4, 2011 by m

Please Check My Math Work
Hi. - I solved this problem,but I am not sure if it is correct.If you can please tell me if it is right or if it is wrong what is wrong with it.: 6y^2-54= (3y-6)(2y+9) *Many of you may be are wondering why my title is,"[C]razy Baby. - [Iloveyou]"it is becuase of the boy that i...
February 9, 2007 by [C]razy Baby.-[iloveyou] (Margie)

Physics >.<
A big truck has a mass of 5,000kg. It is moving down the road at a velocity of 15m/s. As it approaches a stop sign, the driver tries to stop, but the truck slides on ice and hits a car (mass = 500kg) that is stopped. After the collision, they move separately, the truck ...
December 10, 2014 by Devynn

Maths Please Help
Alex and Bella play the following game. They first choose a positive integer N, and take turns writing numbers on a blackboard. Alex starts first, and writes the number 1. After that, if the number k is on the board, the next player may write down either k+1 or 2k, if the new ...
May 22, 2013 by Mathslover

college physics
While standing on a bridge 15.0 m above the ground, you drop a stone from rest. When the stone has fallen 3.10 m, you throw a second stone straight down. What initial velocity must you give the second stone if they are both to reach the ground at the same instant? Take the ...
January 31, 2010 by tina

college physics
While standing on a bridge 15.0 m above the ground, you drop a stone from rest. When the stone has fallen 3.10 m, you throw a second stone straight down. What initial velocity must you give the second stone if they are both to reach the ground at the same instant? Take the ...
January 31, 2010 by tina

physics
While standing on a bridge 18.5 m above the ground, you drop a stone from rest. When the stone has fallen 2.80 m, you throw a second stone straight down. What minimal initial velocity must you give the second stone if they are both to reach the ground at the same instant? Take...
February 7, 2011 by shaknocka

Physics
While standing on a bridge 19.1 m above the ground, you drop a stone from rest. When the stone has fallen 3.40 m, you throw a second stone straight down. What minimal initial velocity must you give the second stone if they are both to reach the ground at the same instant? Take...
September 9, 2012 by jhockens

Physics
While standing on a bridge 18.3 m above the ground, you drop a stone from rest. When the stone has fallen 2.60 m, you throw a second stone straight down. What minimal initial velocity must you give the second stone if they are both to reach the ground at the same instant? Take...
September 9, 2012 by jhockens

physics
A cart running on frictionless air tracks is propelled by a stream of water expelled by a gas-powered pressure washer stationed on the cart. There is a 1.0-m3 water tank on the cart to provide the water for the pressure washer. The mass of the cart, including the operator ...
March 6, 2011 by HELP!!!!

Physics
A stuntman drives a car over the top of a hill, the cross section of which can be approximated by a circular arc of radius 250 m. What is the greatest speed at which he can drive without the car leaving the road at the top of the hill?
March 30, 2011 by Petros

physics
Students in lab measure the speed of a steel ball launched horizontally from a table top to be 4.2 m/s. If the table top is 1.2 m above the floor, where should they place a 20 cm tall tin coffee can to catch the ball when it lands?
October 5, 2011 by samantha

Physics.
The top floor of a building is 40m above the basement. Calculate how much greater the water pressure is in the basement than on the top floor. Express your answer to two significant figures and include the appropriate units.
March 27, 2014 by James

pyhsics
The top floor of a building is 40m m above the basement. Calculate how much greater the water pressure is in the basement than on the top floor. Express your answer to two significant figures and include the appropriate units.
April 3, 2014 by Phil

physics
The top floor of a building is 40m m above the basement. Calculate how much greater the water pressure is in the basement than on the top floor. Express your answer to two significant figures and include the appropriate units.
April 3, 2014 by Phil

physics
A bath toy is floating stationary in water such that half of the toy is above water and half of the toy is below the water. A kid pulls the toy 3.9 cm down into the water and then lets go. The toy then proceeds to bob up and down. It bobs up and down 26 times in a min.
January 10, 2015 by DS

math
Prove that (n(top)sigma r=1(bottom))^2-(n-1(top)sigma r=1(bottom))^2 =n^3 general formula for both notation is r
March 6, 2014 by CHARLES BRONSON

OCHem
The amount of methylcycloheane with the substituent in the equatorial orientation at room temperature (25C) would be The Gibbs free energy for axial methyl to equatorial methyl is -7.28Kj/mol (the universal gas constant is 8.314 j/deg-mol). I cant remember how to solve this...
December 10, 2010 by Alex

University Physics
A 60-kg vampire and 194-kg werewolf clash during the Feat of Strength part of the annual celebration of Festivus. The werewolf velocity just before the clash is 5 m/s and is directed upwards, while the vampire velocity at the moment of the collision is 12m/s and is directed ...
November 1, 2012 by Anonymous

math
a city block 500ft by 500ft is an unobstructed paved lot, except for a small office building 100ft by 100ft, centered in the middle of the block. What's the shortest distance from the SW corner to the NE corner, going through the paved lot and along (but not through) the ...
March 7, 2010 by sarah

business
Deliverable Length: 4-6 slides with notes Think about your current or past employer (or another company you are familiar with). Using the company as a whole, or the department you are most familiar with, evaluate the extent that management utilizes the classic management ...
June 25, 2007 by ABE

bobpursley please help
A coin with a diameter of 3.30 cm is dropped on edge onto a horizontal surface. The coin starts out with an initial angular speed of 16.1 rad/s and rolls in a straight line without slipping. If the rotation slows with an angular acceleration of magnitude 1.93 rad/s2, how far ...
November 28, 2010 by ruby

algebra
Tad was delivering lunch to a local office building. His first delivery was to the middle floor of the building. He then took th elevator up 4 floors for the next delivery, down 6 floors for his third delivery, and up 7 floors for his final delivery. He was then on the top ...
April 14, 2011 by Tom

Physics
You set up a ramp on your desk at home. Marbles rolling down the ramp and horizontally off your desk consistantly land 52.0 cm from the base of your desk. Your desk is 69.0 cm high. If you pull your desk over to the window of your second story room and "launch" marbles to the ...
November 5, 2009 by Anonymous

Physics
A 1900kg car starts from rest and drives around a flat 56-m-diameter circular track. The forward force provided by the car's drive wheels is a constant 1000N. a. What is the magnitude of the car's acceleration at t=13s? b. What is the direction of the car's acceleration at t=...
March 9, 2010 by Kay

business statistics
1-A randomized block design ANOVA has five treatments and four blocks. The computed test statistic (value of F) is 4.35. With a 0.05 significance level, the appropriate table value and conclusion will be? 2-A randomized block experiment having five treatments and six blocks ...
August 11, 2009 by Lesliam

Physics
Assume you are a medieval knight attacking a castle with a canon. The ball leaves the cannon with a speed of 34.9 m/s. The barrel's angle with respect to the ground is 39.5 deg, and you make a perfect hit on the tyrant's chamber which is at the same level as the cannon's ...
November 5, 2009 by Anonymous

physics
A friend is making an iMovie and wants your help designing a skateboard stunt. You estimate that your friend�s mass is four times greater than that of the skateboard. For the following questions, ignore friction. In one scenario, your friend starts by standing at rest ...
March 11, 2014 by anonymous

chemistry... HELP !!!!!!!
For the reaction 2Co^3+ (aq) + 2Cl^- (aq) ----> 2Co^2+ + Cl2 (g) E^o = 0.46 V (STANDARD cell potential) what is the cell potential at (25 deg C) if the concentrations are [Co^3+] = 0.651M , [Co^2+]= 0.846 M, and [Cl^-] = 0.636 M and the pressure of Cl2 is PCl2= 9.30 atm ?
November 5, 2012 by Ann

Physis Home work
Two 0.85Mtrs -long pendulums hang side by side. The masses of the pendulum bobs are 50g and 70g . 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...
November 1, 2011 by Don

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