Wednesday

July 30, 2014

July 30, 2014

Number of results: 43,480

**science**

How much work is required to lift a 3.7-kg concrete block to a height of 2.7 m?
*September 3, 2010 by ashley*

**science**

How much work is required to lift a 3.3-kg concrete block to a height of 1.2 m?
*February 4, 2012 by vanessa*

**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*

**math**

Complete in Metric Conversions: Estimate the cost ($) of the concrete required to construct a concrete sidewalk shaped as shown on the board. The required depth of the concrete in the sidewalk is 4 inches and the concrete costs $105/cubic yard.
*March 27, 2012 by Amy*

**Physics (please help!!!!)**

A box with a volume V = 0.04 m3 lies at the bottom of a lake whose water has a density of 103 kg/m3. (a) How much force is required to lift the box, if the mass of the box is 1050 kg? (b) How much force is required to lift the box, if the mass of the box is 100 kg? (c) How ...
*April 16, 2011 by Anonymous*

**Science**

A fixed, single pulley that is used to lift a block does which one of the following? A. doubles the force required to lift the block B. decreases the force required to lift the block C. makes the block easier to lift by changing the direction of the force needed to lift it D. ...
*April 10, 2013 by Cassie*

**Biomechanics**

An 88.9 kg weight lifter is required to perform a snatch movement for their final lift in a weight lifting competition. The standard weight lifting bar is 20 kg and the load attached to the bar was in the form of 6 x 20 kg weight discs, 2 x 10 kg weight discs, 2 x 5 kg weight ...
*May 7, 2012 by Chleo*

**math**

Suppose that you must order concrete for a sidewalk that is to be 58 ft by 3 ft to a depth of 6 in. How much concrete is required? (Answer to the nearest 1/2 cubic yard.) my answe is 11.5 and is wrong.ugh
*December 4, 2012 by Debin*

**Physics**

A lift is pulled up to the top of a building by a constant force of 6400N at a constant speed of 2m/s. It takes 3mins to reach the top. (a) how much work is done in raising the lift to the top of the building ? (b) what is the power required ?
*June 2, 2011 by Lina*

**physics**

How much work is required to lift a 280 kg refrigerator to the second-story level that is 6m high?
*February 27, 2012 by jim*

**Science**

a)How much work is required to lift a 35-kg object from the ground 3.0 m into the air? b) How much gravitational potential energy did this object gain?
*June 6, 2014 by Annie*

**physical science**

How much work is required to lift a 10kg weight 5m off the floor if the time is 10 sec?
*April 1, 2011 by kitten*

**physics**

A box with a volume V = 0.03 m^3 lies at the bottom of a lake whose water has a density of 103 kg/m^3. (a) How much force is required to lift the box, if the mass of the box is 100 kg? (b) How much force is required to lift the box, if the mass of the box is 70 kg?
*November 27, 2012 by lisa*

**PHYSICS**

The chin-up is one exercise that can be used to strengthen the biceps muscle. This muscle can exert a force of approximately 800 N as it contracts a distance of 7.5 cm in a 78 kg male. How much work can the biceps muscles (one in each arm) perform in a single contraction? 1 J ...
*October 27, 2010 by Petrik*

**Math**

John is using a pulley to lift the sail on his sailboat. The sail weighs 150 N, and he must lift it 4.0 m. a. How much work must be done on the sail? b. If the pulley is 50% efficient, how much work must John do on the rope to lift the sail?
*November 3, 2012 by Leah*

**Physics**

A 0.4-kg ball has a velocity of 20 m/s. a. What is the kinetic energy of the ball? b. How much work was required to lift the box to this position?
*December 28, 2010 by Sylvia*

**physics**

how much work is required to lift a 10 newton weight from 4.0 meters to 40.0 meters above the surface of earth
*February 15, 2011 by abu*

**Physics**

A box with a mass of 5 kg is lifted (at constant velocity) to a height of 3 m to place it on the shelf of a closet. How much work was required to lift the box to this position?
*February 10, 2011 by Alex*

**Geometry**

concrete costs 105 per cubic yard. plato is making a rectangular concrete garage floor measuring 33 feet wide by 6 inches thick. how much will the concrete cost?
*March 28, 2014 by Anonymous*

**Math**

A driveway 18 ft. wide and 36 ft. long is to be paved with concrete 3 in. thick. How many cubic yards of concrete are required?
*April 30, 2014 by Rhett cowley*

**geometry**

John is putting in a concrete patio in his backyard. The dimensions of it are 12ft by 8ft by 6inches. If concrete costs $6.75 per cubic foot how much will the concrete cost for the patio
*June 13, 2011 by Mani*

**physics**

A crane lifts a concrete hopper of mass 370 kg from the ground to the top of a 38 m building that is under construction. The hopper moves with a constant speed during the lift. The power rating of the crane motor is 8.2 kiloWatts. How much work does the crane do in lifting the...
*February 20, 2011 by sam*

**physics/calc**

A worker on scaffolding 75 ft above the ground needs to lift a 500 lb bucket of cement from the ground to point 30 ft above the ground by pulling on a opre weighing .5 lb/ft. how much work is required? I know to use the Work integral, but im not sure wat equation to use
*March 31, 2008 by Jessica*

**Math**

1. Suppose you want to buy concrete for a 36ft by 24 ft by 9 in. patio. If concrete costs $55/yd^3, how much will the concrete for the patio cost? 2. A cylinder has a volume of about 500 cm^3 and a height of 10 cm. What is the lenght of the radius to the nearest tenth of a cm?
*March 17, 2014 by Gavin*

**math**

The concrete for a sidewalk is being poured outside the perimeter of a new subdivision, which is a 280 ft. by 720 ft. rectangle. The building code requires that the sidewalk be 5 feet wide and 8 inches deep. How many cubic yards of concrete will need to be poured? How much ...
*April 9, 2014 by Willy*

**Physics**

The third floor of a house is 9 m above the street level. How much work (in kJ) is required to lift a 700-kg piano to the third-story level?
*July 3, 2012 by Bruin*

**Physics**

Select which of the following statements are True or False. Assume Newtonian Mechanics. 1.The work required to lift a mass one meter depends on the speed at which it is raised.. 2.The acceleration of an object is same in all inertial reference frames. 3.The work done by a ...
*February 28, 2008 by josh g*

**physics**

A box with a mass of 2 kg is lifted (without acceleration) through a height of 8.0 m in order to place it upon the shelf of a closet. (a) What is the increase in potential energy of the box? 1 . J (b) How much work was required to lift the box to this position? 2 J
*March 5, 2012 by Sara*

**Physics**

A pump is required to lift a mass of 750kg of water per minute from a well of depth 13.2m and eject it with a speed of 17.4m/s. A) How much work is done per minute in lifting the water? B) How much in giving the water the kinetic energy it has when ejected? C) What must be the...
*March 17, 2014 by Garrett*

**Calculus**

A chain 27 feet long whose weight is 74 pounds is hanging over the edge of a tall building and does not touch the ground. How much work is required to lift the entire chain to the top of the building?
*February 11, 2011 by Allison*

**Physics**

Early one October, you go to a pumpkin patch to select your Halloween pumpkin. You lift the 2.8 kg pumpkin to a height of 1.4 m, then carry it 50.0 m (on level ground) to the check-out stand. Calculate the work you do on the pumpkin as you lift it from the ground? and How much...
*March 15, 2011 by Alan*

**Calc II**

A worker on scaffolding 65 ft above the ground needs to lift a 390 lb bucket of cement from the ground to a point 20 feet above the ground by pulling on a rope weighing 5 lb/ft. How much work is required?
*October 16, 2012 by Liz*

**Physics**

If the co-efficient of static friction for a 5 kg rubber block is 0.3 how much more force is required to lift the block than to start it sliding? I worked out force to get it sliding is 14.7 N (5*9.8*.3) but not sure about the upward force to lift it.
*April 1, 2009 by CC*

**physics**

A pump is required to lift 800 liters of water per minute from a well 15.0 m deep and eject it with a speed of 17.0 m/s. How much work per minute does the pump do?
*July 19, 2010 by tom*

**physical science**

how much power is required to lift the crate
*November 21, 2010 by crystal*

**Science**

A boy lift a box that weighed 40 newtons if the boy was 1.5 meter tall how much work did he do as he lift the box?
*June 1, 2012 by Daniel*

**physics**

Using the inverse-square gravitational law, calculate the work required to lift a 1000-kg satellite from the earth's surface to an altitude of 100 mi and inject it into orbit at 17,500 mph. How long would a 300-hp engine have to be run to produce this much energy
*July 10, 2011 by paul smith*

**Physics**

You take a 10 N block and lift it 1 meter vertically from the floor and then place it back down on the floor. How much work do you do during this motion? W = F x d x cos(theta) So lifting it does work and the lowering it does negative work won't that cancel out to get OJ of work
*July 1, 2014 by Macy*

**Physics**

You pick up a 2.5kg can of paint from the ground and lift it to a height of 1.7m .How much work do you do on the can of paint? You hold the can stationary for half a minute, waiting for a friend on a ladder to take it. How much work do you do during this time?
*February 7, 2014 by Omar*

**science**

If you lift a bag that weighs 15 N a distance of 2 m, how much work have you done? work=weight*distanceupward
*June 16, 2006 by ryan*

**Management accounting**

Suppose one chairlift costs $2 million now you have to install the lift for $1.3 million, this lift allows 300 skiers on the slopes,for 40 days out of a year, running it costs $500 a day for the 200 days that it is open, now suppose the lift tickets cost $55 a day and cash ...
*May 28, 2007 by please help !!!*

**physics**

How much power is required to do 110 J of work on an object in a time of 0.4 s? W How much power is required if the same work is done in 5 s? W
*January 23, 2012 by james*

**Physics**

How much work does a person do to lift 60000 a distance of 7.8 ft in 10s? How much power? Hp?
*February 18, 2009 by Cindy*

**PHYSICS**

A pump is required to lift a mass of 850 of water per minute from a well of depth 14.8 and eject it with a speed of 17.7 . Part A How much work is done per minute in lifting the water? Part B How much in giving the water the kinetic energy it has when ejected? Part C What must...
*May 5, 2013 by YASER*

**physics**

A person has a choice while trying to move a crate across a horizontal pad of concrete: push it at a downward angle of 30 degrees, or pull it at an upward angle of 30 degrees. If the crate has a mass of 50.0 kg and the coefficient of friction between it and the concrete is 0....
*March 21, 2014 by santoki*

**physics**

A person has a choice while trying to move a crate across a horizontal pad of concrete: push it at a downward angle of 30 degrees, or pull it at an upward angle of 30 degrees. If the crate has a mass of 50.0 kg and the coefficient of friction between it and the concrete is 0....
*March 23, 2014 by santoki*

**physics**

A person has a choice while trying to move a crate across a horizontal pad of concrete: push it at a downward angle of 30 degrees, or pull it at an upward angle of 30 degrees. If the crate has a mass of 50.0 kg and the coefficient of friction between it and the concrete is 0....
*March 23, 2014 by santoki*

**physics**

A person has a choice while trying to move a crate across a horizontal pad of concrete: push it at a downward angle of 30 degrees, or pull it at an upward angle of 30 degrees. If the crate has a mass of 50.0 kg and the coefficient of friction between it and the concrete is 0....
*March 24, 2014 by santoki*

**Calculus**

A chain 64 meters long whose mass is 20 kilograms is hanging over the edge of a tall building and does not touch the ground. How much work is required to lift the top 3 meters of the chain to the top of the building?
*September 29, 2012 by Ryan*

**physics**

Calculate the work required to lift a 20kg object from the floor to a height of 2 meters. Give your answer in Joules
*February 26, 2012 by Darcie*

**physics**

How much work is required to lift a 600-kg satellite to an altitude of 4 * 10^6 m above the surface of the earth? The gravitational force is F=GMm/r^2, where M is the mass of earth, m is the mass of the satellite, r is the distance between them. The radius of the earth is 6.4...
*February 11, 2011 by Allison*

**Concrete on different temperature?**

if a section of concrete is poured for a road and the engineer leaves no gap between sections poured before and after the section in question , what will happen to concrete if the temperature varies from 0 C to 40 C ? Assume that the initial temperature of the pouring was 17 ...
*December 11, 2012 by andy*

**Physics**

1. How much work or energy (in J) does a 150 W light bulb convert to heat and light in 1.0 h? 2.The force of gravity on a box of apples is 98.0 N. How much work will you do (a) if you lift the box from the floor to a height of 1.2 m? (b if you carry the box horizontally a ...
*October 28, 2012 by HanuP28O*

**Physics**

Figure 18-46 shows a hydraulic lift operated by pumping fluid into the hydraulic system. The large cylinder is 40 cm in diameter, while the small tube leaving the pump is 1.7 cm in diameter. A total load of 2500 kg is raised 2.2 m at a constant rate. Neglect pressure ...
*December 5, 2012 by Drake*

**Physical Science**

an initially stationary 15.0 kg crate of cheese wheels is pulled via a cable a distance d = 5.70 m up a frictionless ramp to a height of h = 2.5 m, where it stops. What is its potential energy of the crate after it is lifted? how much work is done during the lift? If it takes ...
*June 24, 2011 by junior*

**physics**

A crane lifts 1 tonne of concrete through a height of 25 m. How much work does it do? (1 kg has a weight of 9.81 N.)
*January 29, 2010 by Mota*

**physics**

An initially stationary 15.0-kg crate of cheese wheels is pulled via a cable a distance d= 5.70m up a frictionless ramp to a height of h= 2.50m, where it stops. What is the potential energy of the crate after it is lifted? How much work is done during the lift? If it takes 10 ...
*June 30, 2011 by rosie*

**physics**

A crane lifts a concrete hopper of mass 370 kg from the ground to the top of a 38 m building that is under construction. The hopper moves with a constant speed during the lift. The power rating of the crane motor is 8.2 kiloWatts. How long does it take for the crane to lift ...
*February 20, 2011 by anonymous*

**MAth**

a concrete area measures 20ft on each side. the concrete slab will be 8 inches deep. how many cubic feet of concrete will be needed? my set up is 20 x 20 + 32 ????
*April 15, 2011 by Caroline *

**english**

Our class had a test in Spanish this afternoon. find the nouns mark concrete or abstract class concrete test concrete spanish concrete afternoon concrete?
*June 16, 2011 by Paula*

**Physics ~Work Kinetic Energy~**

1.)A ball (m 0.5 kg) starts from rest and has 300 J(joule) of work applied to it. a) what is the initial kinetic energy of the ball? b) what is the final kinetic of the ball? c) what is the final velocity of the ball? 2.)A boy is doing chin-up. If the boy does 450 N of work to...
*January 30, 2013 by Isis*

**Physics**

How much work is needed to lift a 3 kg mass a distance of 0.75 m?
*February 27, 2011 by Lesley*

**math**

You lift a box that weighs 93 N a distance of 1.5 m. How much work did you do?
*April 10, 2013 by Anonymous*

**calculus**

A metal chain weighs 30 lbs and is 10 feet long. How much work is required to lift one end of the chain to a height of 15 feet (so that the other end of the chain will be at a height of 5 feet)?
*April 17, 2011 by Anonymous*

**calculus**

A metal chain weighs 30 lbs and is 10 feet long. How much work is required to lift one end of the chain to a height of 15 feet (so that the other end of the chain will be at a height of 5 feet)?
*December 1, 2011 by Steven*

**math**

A solar home contains 3.50 multiplied by 105 kg of concrete (specific heat = 1.00 kJ/kg·K). How much heat is given off by the concrete when it cools from 29 to 20°C?
*November 13, 2012 by Adam*

**Science**

Ok, so the formula for power is p=w/t but how would it work in this problem: what power output is required to lift a 3 kg mass at an average velocity of 5 m/s
*February 7, 2010 by Natalie*

**physics**

A 3.0 m tall, 42 cm diameter concrete column supports a 230,000 kg load. By how much is the column compressed? Assume Young's modulus for concrete to be 3.0 1010 N/m2. in mm
*July 2, 2011 by Kate*

**Calculus **

(i) A 20m chain with a mass-density of 3kg/m (coiled on the ground). How much work is performed lifting the chain so that it is fully extended (and one end touches the ground)? (ii) How much work is performed to lift 1/4 of the chain?
*May 12, 2014 by T*

**Calculus **

(i) A 20m chain with a mass-density of 3kg/m (coiled on the ground). How much work is performed lifting the chain so that it is fully extended (and one end touches the ground)? (ii) How much work is performed to lift 1/4 of the chain?
*May 12, 2014 by HELP ASAP*

**physical**

C.How much work does the ride do to lift theriders up to a height of 50 meters?
*November 19, 2010 by Anonymous*

**science**

how much work done if lina lift a package that weight 5.5 to a height of 0.5 m?
*July 6, 2013 by Anonymous*

**Science**

Dingtu can lift a weight of 60 kg on the earth. How much will he be able to lift when on moon? A. 60 Kg B. 10 Kg C. 360 Kg D. 120 Kg
*January 23, 2012 by Abhinav Chandran*

**AP Physics**

A cord runs around two massless, frictionless pulleys; a canister with mass m=20 kg hangs from one pulley; and you exert a force F if you are to lift the cord. a) What must be the magnitude of F if you are to lift the canister at a constant speed? b) To lift the canister by 2 ...
*December 14, 2009 by Mikaela*

**Physics - pulley**

A construction crew pulls up an 87.5-kg load using a rope thrown over a pulley and pulled by an electric motor. They lift the load 15.5 m and it arrives with a speed of 15.6 m/s having started from rest. Assume that acceleration was not constant. I have done the problem but am...
*June 3, 2011 by Casey*

**Physics**

15. A refrigerator weighing 1500 N is to be lifted onto a truck bed that is 1.0 m above the ground. When pushed up a slanting ramp 2.0 m in length a force parallel to the ramp of only 800 N is required to move it at constant velocity. Comparing the work involved in lifting the...
*July 8, 2014 by Anonymous*

**Management accounting**

Suppose one chairlift costs $2 million and the slopes along with the lift have to be install for $1.3 million, this lift allows 300 skiers on the slopes, for 40 days out of a year. Running the lift will cost $500 a day for 200 days that the ski resort will be opened, now ...
*May 27, 2007 by please help !!!*

**Physics**

A 855 N crate rests on the floor. a) How much work is required to move it at constant speed 7.7 m along the floor against a friction force of 180 N? b) How much work is required to move it at constant speed 7.7 m vertically? I really NEED help I am very lost with physics!!!!
*October 15, 2009 by Jen *

**Management accounting**

suppose one chairlift costs $2 million and the slopes aand the lift had to be install for $1.3 million, and the lift let 300 skiers on the slopes, for 40 days out of a year) Running the lift cost $500 a day for 200 days for the ski resort openings, now suppose the lift tickets...
*May 26, 2007 by please help !!!*

**math**

A 4inch-thick concrete slab is being poured for a circular patio 14 feet in diameter. Concrete costs $55 per cubic yard. Find the cost of the concrete, to the nearest cent.
*April 11, 2013 by brittany*

**Managerial Accounting**

a ski company plan to add five new chai500 a day for the lift. the lifts cost 2 million and to install the lift cost another 1.3 mil.The lift will allow 300 additional skiers on the slopes but only 40 days a year will be needed. The company will sell 300 lift tickets on those ...
*August 23, 2009 by Anita*

**geomety**

You want to pour a concrete slab with a width of 16 feet, a length of 16 feet, and a height of 0.5 feet. Find the volume of the concrete, so you know how much you will need
*May 26, 2013 by Hannah*

**science**

A box of groceries requires 5.0 newtons of force to lift it up 1.0 meter. How much work is done?
*May 26, 2011 by yo*

**Management Accounting**

Deer Valley Lodge, a ski resort in the Wasatch Mountains of Utah, has plans to eventually add five new chair lifts. Suppose that one lift costs $2 million, and preparing the slope and installing the lift costs another $1.3 million. The lift will allow 300 additional skiers on ...
*May 23, 2007 by Charlotte Holmes*

**Physics**

A construction crew pulls up an 87.5-kg load using a rope thrown over a pulley and pulled by an electric motor. They lift the load 15.1 m and it arrives with a speed of 15.6 m/s having started from rest. Assume that acceleration was not constant. a. How much work (J) was done ...
*July 31, 2012 by Anonymous*

**Physics**

A construction crew pulls up an 87.5-kg load using a rope thrown over a pulley and pulled by an electric motor. They lift the load 15.1 m and it arrives with a speed of 15.6 m/s having started from rest. Assume that acceleration was not constant. a. How much work (J) was done ...
*July 31, 2012 by Anonymous*

**physics**

How much work is needed to lift a 400kg engine upward 1.5 meters out of a car?
*December 9, 2012 by avery*

**physics**

How much work is needed to lift a 400kg engine upward 1.5 meters out of a car?
*December 9, 2012 by avery*

**physics**

How much work is needed to lift a 400kg engine upward 1.5 meters out of a car?
*December 9, 2012 by avery*

**physics**

An arrangement of two pulleys, as shown in the figure, is used to lift a 49.6-kg mass a distance of 3.70 m above the starting point. Assume the pulleys and rope are ideal and that all rope sections are essentially vertical. (a) What is the mechanical advantage of this system...
*June 11, 2012 by Akbar*

**Physics**

An arrangement of two pulleys, as shown in the figure, is used to lift a 49.6-kg mass a distance of 3.70 m above the starting point. Assume the pulleys and rope are ideal and that all rope sections are essentially vertical. (a) What is the mechanical advantage of this system...
*June 11, 2012 by Akbar*

**physics**

An arrangement of two pulleys, as shown in the figure, is used to lift a 49.6-kg mass a distance of 3.70 m above the starting point. Assume the pulleys and rope are ideal and that all rope sections are essentially vertical. (a) What is the mechanical advantage of this system...
*June 13, 2012 by Akbar *

**Physics (Work)**

The work required to stretch a certain spring from an elongation of 4.54 cm to an elongation of 5.54 cm is 31.1 J. (a) Is the work required to increase the elongation of the spring from 5.54 cm to 6.54 cm greater than, less than, or equal to 31.1 J? (b) Verify your answer to ...
*August 5, 2010 by Kate West*

**Science**

trying to lift an 8-N load that is attached to a fixed 2 pulley system. Hands move a distance of 1.6m while the load moves 0.8m, what is the force required to lift the load? I am thinking the the answer is 1.6 divided by 0.8 am i on the right track? what is the formula for ...
*February 6, 2013 by Jenn*

**Chemistry**

A weightlifter manages to lift a 133 kg (that's 293 pounds, which sounds much more impressive) weight a distance of 1.4 m. How many kcal of heat energy is equivalent to this lift?
*January 15, 2014 by Randall*

**Physics**

A weightlifter manages to lift a 133 kg (that's 293 pounds, which sounds much more impressive) weight a distance of 1.4 m. How many kcal of heat energy is equivalent to this lift?
*January 17, 2014 by Randall*

**geometry**

Concrete can be purchased by the cubic yard. How much will it cost to pour a slab that is 17 ft by 17 ft by 4 ft if the concrete costs $50.00 per cubic yard?
*May 14, 2014 by Sarah*

**physics**

An arrangement of two pulleys, as shown in the figure, is used to lift a 49.6-kg mass a distance of 3.70 m above the starting point. Assume the pulleys and rope are ideal and that all rope sections are essentially vertical. (a) What is the mechanical advantage of this system...
*June 7, 2012 by Akbar*

**More Algebra **

Eve and Jason have an exercise routine that they do together three days a week. Together, they can lift 225 pounds. a) If Eve can lift 113 pounds,how many pounds can Jason lift? b). If Eve can lift 87 pounds, how many pounds can Jason lift? c) What expression can be used to ...
*October 2, 2011 by Jab*

**physics**

a) In raising a 4800 N piano with a pulley system, the workers note that for every 2 m of rope pulled down, the piano rises 0.3 m. Ideally, how much force is required to lift the piano? (b) If the workers actually pull with 2500 N of force to lift the piano, what is the ...
*February 8, 2007 by janice*

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