Friday
April 18, 2014

Search: A weight (with a mass of 22 kg) is suspended from a point near the right-hand end of a uni- form boom

Number of results: 88,039

Vectors
A 10-kg mass is suspended by two strings of length 5m and 7m attached to two points in the ceiling 10 m apart. Determine the tension on each string. Round your result to one decimal place (include a vector and position diagrams)
Tuesday, May 28, 2013 at 10:39pm by Maria

Vectors
A 10-kg mass is suspended by two strings of length 5m and 7m attached to two points in the ceiling 10 m apart. Determine the tension on each string. Round your result to one decimal place (include a vector and position diagrams)
Friday, May 31, 2013 at 4:05pm by samantha

Science-Physics
A pendulum with 1kg weight is set in motion from a position .04 m above the lowest point on the path of the weight. What is the kinetic energy of the pendulum at the lowest point?
Sunday, March 4, 2012 at 12:45pm by Ryley

physics
A pendulum with 1kg weight is set in motion from a position .04 m above the lowest point on the path of the weight. What is the kinetic energy of the pendulum at the lowest point?
Sunday, March 4, 2012 at 2:48pm by Ryley

science
. The pyramid of mass demonstrates that ______ a) the same number of organisms is at the top as at the base of the pyramid b) mass is gained as a food chain progresses c) at each link in a food chain, mass is lost d) the mass of the producers in a community equals the mass of ...
Thursday, September 9, 2010 at 8:55am by pam

physics
consider a massless cord attached at both ends to hooks in a ceiling. A 20 kg mass is then suspended from the first cord by a second cors. The angles made by the cord with the ceiling are 40 degrees (left angle) and 25 degrees (right angle). Find the tension in each cord. I ...
Monday, November 20, 2006 at 6:09pm by randy

Chemistry-DrBob222
Yes. 180 is the molar mass and 284 is delta T. The problem states that the freezing point of the solution is -284. The normal freezing point of pure water is 0 so if the freezing point is 2.84 degrees less than 0, that is 2.84 for delta T. Put another way. delta T = Tnormal - ...
Monday, January 17, 2011 at 10:42pm by DrBob222

Physics
You pull downward with a force of 32 N on a rope that passes over a disk-shaped pulley of mass 1.3 kg and radius 0.075 m. The other end of the rope is attached to a 0.60 kg mass. Find the linear acceleration of the 0.60 kg mass.
Thursday, November 3, 2011 at 12:26am by Cooper

Chemistry
A student made a determination of the empirical formula ot tungsten oxide (WO) produced by the total ignition of air of a smaple of metallic Tungsten. From the lab: Weight of crucible 11.120g weight of tungsten 8.820 weight of crucible and product (WO) 22.836 a. Calculate the ...
Wednesday, October 26, 2011 at 12:24pm by Izzie

physics
Archimedes principle: the bouyant force is equal to the weight of the water displaced. a. mass of ice=density*volume b. weight of water displced: densitysea*volumeice*g weight of bear and ice: = massbear*g+massice*g set the two weights equal, and solve for mass bear.
Saturday, March 9, 2013 at 11:43am by bobpursley

Physics
An aluminum calorimetry cup [mc = 0.6 kg, cc = 0.22 kcal/(kgC)] is filled with water [mw = 2.4 kg, cw = 1 kcal/(kgC)]. It is at a temperature of 30C. A sample of an unknown substance with mass mm = 2.34 kg, originally at a temperature of 210C, is added. After a while, the ...
Friday, January 17, 2014 at 6:25pm by Randall

Physics
An aluminum calorimetry cup [mc = 0.6 kg, cc = 0.22 kcal/(kgC)] is filled with water [mw = 2.4 kg, cw = 1 kcal/(kgC)]. It is at a temperature of 30C. A sample of an unknown substance with mass mm = 2.34 kg, originally at a temperature of 210C, is added. After a while, the ...
Friday, January 31, 2014 at 10:56am by Randall

Physics
An aluminum calorimetry cup [mc = 0.6 kg, cc = 0.22 kcal/(kgC)] is filled with water [mw = 2.4 kg, cw = 1 kcal/(kgC)]. It is at a temperature of 30C. A sample of an unknown substance with mass mm = 2.34 kg, originally at a temperature of 210C, is added. After a while, the ...
Monday, February 3, 2014 at 1:54pm by Riley

Physics
An iron block of the mass 1 kg is suspended on a spring of the spring constant 140 N/m, and merged into a vessel with 8 liters of water. The mass is displaced by 10 cm from its equilibrium position, and released. How much energy in J has been dissipated by the time the mass ...
Friday, December 3, 2010 at 6:18pm by HelpPlease

math
A mouse has a mass of 18 g. A guinea pig has a mass of 0.85 kg. Is the mass of the two animals together greater or less than 1 kg? And why?
Wednesday, August 27, 2008 at 8:04pm by jasmyn

physics
A mass m = 4 kg hangs on the end of a massless rope L = 2.02 m long. The pendulum is held horizontal and released from rest. 1)How fast is the mass moving at the bottom of its path? 2)What is the magnitude of the tension in the string at the bottom of the path? 3)If the ...
Tuesday, October 11, 2011 at 11:31pm by a

physicsssss
A mass m = 4 kg hangs on the end of a massless rope L = 2.02 m long. The pendulum is held horizontal and released from rest. 1)How fast is the mass moving at the bottom of its path? 2)What is the magnitude of the tension in the string at the bottom of the path? 3)If the ...
Saturday, October 8, 2011 at 3:37pm by aaa

physics
A neutron star and a black hole are 5.650e+12 m from each other at a certain point in their orbit. The neutron star has a mass of 2.781030 kg and the black hole has a mass of 9.941030 kg.
Sunday, December 15, 2013 at 5:21pm by yannet

Physics
Three blocks are in contact with each other on a frictionless horizontal surface. A 417 N horizontal force is applied to the block with mass of 3.7 kg as shown in the figure below. The acceleration of gravity is 9.8 m/s^2. (the picture looks like this) F *----->[3.7 ...
Friday, November 16, 2012 at 7:44pm by alice

Physics - AHH!!!
Jimmy has caught two fish in Yellow Creek. He has tied the line holding the 4.30 kg steelhead trout to the tail of the 1.39 kg carp. To show the fish to a friend, he lifts upward on the carp with a force of 87.7 N. What is the tension of the rope connecting the steel trout and...
Sunday, October 26, 2008 at 1:40am by Anonymous

PHYSICS
Is the weight of a body the same thing as its mass? Discuss briefly. Is the weight of a body constant at all places on the earth? is the mass?
Tuesday, February 1, 2011 at 12:54pm by Anonymous

phy
1. A Uniform rod AB 3m long weighing 3 Kg is held horizontally by two strong vertical strings at its ends. A weight of 7 kg is hanging on the rod at a distance of 1m from end A and another weight of 12 Kg is hanging at 0.5 m from end B.(a)Make the free body diagram of the rod ...
Tuesday, August 24, 2010 at 10:31am by shiva

physics
A small drop of water is suspended motionless in air by a uniform electric field that is directed upward and has a magnitude of 7840 N/C. The mass of the water drop is 3.84 10-9 kg. (a) Is the excess charge on the water drop positive or negative?
Thursday, September 3, 2009 at 1:42pm by amber

chemistry is this answer right
115 grams of KCl is dissolved in 750 ml of water. what are the molality, molarity, mole percent, % mass, ppm by mass. what would the freezing point and boiling point of that solution assuming Kf of water is 1.86 degree celsius/m and Kb is .0512 degree celsius/m chemisty - ...
Tuesday, February 8, 2011 at 9:47am by shaknocka lewis

math
first, kilogram is not a measure of weight, it is a measure of mass. Your teacher should know that. Weight is in Newtons. 1000grams= 1kilogram of mass.
Thursday, March 1, 2012 at 8:25pm by bobpursley

physics
9. The surface of the earth is approximately 6,400 km from its center. If the mass of the earth is 6.0 x 1024 kg, what is the acceleration due to gravity near the surface?
Thursday, December 15, 2011 at 2:54am by Anonymous

physics
A uniform metal rod of mass 100 kg and L (2.5m) is suspended from the side of the building. On the far end of a mass of 100 kg is hung by a rope, (distance L from a building). The rod is connected to the building on the left end by a pivot, (and a force F is exerted on the rod...
Thursday, November 25, 2010 at 2:12am by Luke

Physics
Suppose you are driving a car around in a circle of radius 157 ft, at a velocity which has the constant magnitude of 42 ft/s. A string hangs from the ceiling of the car with a mass of 1.8 kg suspended from it. What angle (in degrees) will the string make with the vertical?
Saturday, April 5, 2008 at 12:40pm by Charlie

physics
a fis is suspended from a 6m uniform beam supported by a cable and attached by a pivot to the ground. the beam has a mass of 20 kg and the cable can withstand a maximum tension of 10000 N. find masimum wright of a fish that can be supported by this system
Saturday, May 14, 2011 at 6:04am by cinthia

Physics(Please check)
A spring stretches by 0.0226 m when a 4.39-kg object is suspended from its end. How much mass should be attached to this spring so that its frequency of vibration is f = 7.35 Hz? 7.35 = 0.0226(4.39x) Did I set this up correctly?
Saturday, June 9, 2012 at 5:15pm by Hannah

Physics(please check)
A spring stretches by 0.0226 m when a 4.39-kg object is suspended from its end. How much mass should be attached to this spring so that its frequency of vibration is f = 7.35 Hz? 7.35 = 0.0226(4.39x) Did I set this up correctly?
Sunday, June 10, 2012 at 9:45am by Hannah

chemistry
The procedure described in this experiment was used to determine the molar mass of unknown liquid (non-electrolyte). The solution was made by mixing 0.961 g of the unknown with 100.0 g of water. The freezing point depression of the solution was −3.7C. Calculate the ...
Thursday, April 19, 2012 at 2:39am by hereyago

Physics
When a patients injured neck is healing, it is often desirable to prevent the weight of the head from pushing down on the neck. This can be accomplished with the system of pulleys shown in the figure. The pulleys are all small and extremely light in weight and have no ...
Wednesday, February 23, 2011 at 9:32pm by Carl

Physics
At the low point in its swing, a pendulum bob with a mass of 0.2 kg has a velocity of 4 m/s What is the Kinetic at the low point? and Ignoring air resistance how high will the bob swing above the low point before reversing direction?
Friday, February 15, 2013 at 2:00pm by Laura

science
If it is a perfect gas it is 22.4 moles per liter at STP molecular mass = 222 grams/mol so 222 grams/22.4 liter = 9.91 grams/liter You can convert that to Kg/m^3 or whatever if you chose.
Tuesday, January 21, 2014 at 5:32pm by Damon

AP Chemistry
The buoyant force on a balloon is equal to the mass of air it displaces. The gravitational force on the balloon is equal to the sum of the masses of the balloon, the gas it contains, and the balloonist. If the balloon and balloonist together weight 175 kg, what would the ...
Monday, October 11, 2010 at 4:37pm by Emma

physics
1 liter of water has a mass of 1.00 kg Energy added in one hour = 3600 s * 350 J/s = 1.26*10^6 J Energy required to heat all of the water to 100C (the boiling point) = 1 kg*60 K*4200 J/kgK = = 2.52*10^5 J Energy available to boil water = 1.26*10^6 - 0.252*10^6 = 0.998*10^6 J ...
Sunday, August 7, 2011 at 5:32am by drwls

physics
A sphere of mass 3.3 10-4 kg is suspended from a cord. A steady horizontal breeze pushes the sphere so that the cord makes an angle of 41 with the vertical when at rest (a) Find the magnitude of that push. (b) Find the tension in the cord.
Thursday, September 23, 2010 at 8:09pm by harrypotter

physics
A sphere of mass 3.3 10-4 kg is suspended from a cord. A steady horizontal breeze pushes the sphere so that the cord makes an angle of 41 with the vertical when at rest (a) Find the magnitude of that push. (b) Find the tension in the cord.
Saturday, September 25, 2010 at 2:11pm by annamaria

physics
An automobile can be considered to be mounted on four identical springs as far as vertical oscillations are concerned. The springs of a certain car are adjusted so that the oscillations have a frequency of 3 Hz. (a) What is the spring constant of each spring if the mass of the...
Thursday, December 11, 2008 at 8:08pm by johnny

Physics
A 4 kg weight falls on a spring that is facing up. The weight compresses the spring 0.25m. If the spring constant of the spring is 3.5N/m, how high was the weight when it was dropped?
Tuesday, March 19, 2013 at 7:14pm by Wilson

Chemistry
Use the density and PV = nRT to solve for molar mass of X. Then 3.46g X/molar mass X = moles. molality = moles/kg solvent delta T = Kf*molality normal freezing point - delta T = new freezing point.
Tuesday, November 8, 2011 at 9:09am by DrBob222

physics
A 0.101 kg meter stick is supported at its 40 cm mark by a string attached to the ceiling. A 0.68 kg object hangs vertically from the 6.61 cm mark. A second mass is attached at another mark to keep it horizontal and in rotational equilibrium. If the tension in the string ...
Wednesday, February 8, 2012 at 9:26pm by Lor

physics
A Newton is a measure of force, such as weight. If you are talking about the weight force, the weight will depend upon where the mass is located.
Saturday, November 15, 2008 at 3:43pm by drwls

Physics
A uniform plank of length 5.5 m and weight 219 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support (see the drawing). To what distance x can a person who weighs 447 N walk on the overhanging part of the plank before it just begins to ...
Wednesday, March 21, 2007 at 9:40am by Mary

physics
compute the least acceleration with which a man of mass 75 kg can slide down a rope which can sustain a weight of 580 N
Thursday, January 12, 2012 at 11:53pm by Grail

Physics help please!
The mass of additional water displaced equals the mass of the rock. That equals pi*R^2*2.3 cm^3* 1.00 g/cm^3 = 65.3 grams = 0.0653 kg For the rock's weight in newtons, multiply that by 9.8.
Friday, June 15, 2012 at 5:18pm by drwls

Chemistry
A sample of naphthalene (C10H8) that has a mass of 0.7200 g is burned in a bomb calorimeter. The mass of the calorimeter is 1.580 kg, and its specific heat is 2.55 J/(gC). As a result of the reaction, the temperature of the calorimeter increases from 22.00C to 29.3C. If 1 ...
Monday, July 8, 2013 at 10:48am by Timmy

physics
In the ballroom of a historic palace near Paris, a chandelier hangs from the ceiling by a cable. The mass of the chandelier is 390 kg. Find the tension in the cable.
Friday, February 25, 2011 at 9:22pm by Nolan

physics
A 20-lb weight is hung on an 18-in. spring stretching it 6 in. The weight is pulled down 5 in. and 5 lb are added to the weight. If the weight is now released with a downward velocity of y0 in./sec, find the position of mass relative to the equilibrium in terms of y0 and valid...
Saturday, November 27, 2010 at 8:07pm by Viet

Physics
Calculate the force of gravity on a spacecraft 19200 km (3 earth radii) above the Earth's surface if its mass is 1600 kg. Hint: At three earth radii from the surface of the Earth, the gravity force (weight) of the spacecraft will be reduced to (1/4)^2 = 1/16 of the weight when...
Sunday, January 7, 2007 at 11:43pm by Scotty

Math
Eric has two rock samples. One has a mass of 600 grams and the other has a mass of 1 kg. He recorded the total mass as 7 kg. What did he do wrong? What is the correct answer?
Tuesday, March 4, 2014 at 10:08pm by Ann

PHYSICS
A yoyo of mass m=2 kg and moment of inertia ICM=0.09 kg m2 consists of two solid disks of radius R=0.3 m, connected by a central spindle of radius r=0.225 m and negligible mass. A light string is coiled around the central spindle. The yoyo is placed upright on a flat rough ...
Friday, December 6, 2013 at 4:16pm by anonymous

physics
A neutron star has a mass of 1.27 1030 kg (about the mass of our sun) and a radius of 6.47 103 m. Suppose an object falls from rest near the surface of such a star. How fast would it be moving after it had fallen a distance of 0.0086 m? (Assume that the gravitational force...
Wednesday, December 12, 2012 at 5:50pm by shine

Physics
A mass M = 40.0 kg is suspended by a massless string from the ceiling of a van which is moving with constant acceleration a, as shown in the figure. If the string makes an angle theta = 21 with respect to the vertical, what is the acceleration a of the van? What is the ...
Tuesday, December 24, 2013 at 12:53pm by Lina

physics
A 2 kg mass resting on a smooth plane inclined 20 degrees to the horizontal. A cord which is parallel to the plane passes over a massless, frictionless pulley to a 4 kg mass which will drop vertically when released. What will be the speed of the 4 kg mass 4 seconds after it is...
Wednesday, February 19, 2014 at 2:44am by Aim Senallagam

physics (Newton"s law of gravitation)
Please, can someone help me with this? A neutron star and a black hole are 2.400e+12 m from each other at a certain point in their orbit. The neutron star has a mass of 2.781030 kg and the black hole has a mass of 9.941030 kg. What is the magnitude of the gravitational ...
Sunday, April 21, 2013 at 11:15pm by Kathy

Physics
A sturdy wooden board, 4.0 meters long and with a mass of 32 kg, rests on two supports (labeled L and R) placed 1.2 m from each end as shown in the figure below. (a) Suppose that a man with a mass of 60 kg stands at the center of the board (point a). What are the upward forces...
Tuesday, November 16, 2010 at 4:52pm by Sam

Physics help!!
A Styrofoam bucket of negligible mass contains 1.60 kg of water and 0.425 kg of ice. More ice, from a refrigerator at -14.8 degree C, is added to the mixture in the bucket, and when thermal equilibrium has been reached, the total mass of ice in the bucket is 0.768 kg. Assuming...
Monday, April 16, 2012 at 10:13am by Joey

Physics help!!
A Styrofoam bucket of negligible mass contains 1.60 kg of water and 0.425 kg of ice. More ice, from a refrigerator at -14.8 degree C, is added to the mixture in the bucket, and when thermal equilibrium has been reached, the total mass of ice in the bucket is 0.768 kg. Assuming...
Monday, April 16, 2012 at 12:30pm by Joey

Science
Calculate the linear momentum of a pickup truck that has a mass of 1100 kg and is traveling eastward at 22 m/s.
Thursday, June 13, 2013 at 8:27pm by Audible

chemistry
The physician has prescribed a medication of 3.5 mg/kg of body weight. If you give 297 mg of medication what is body weight of patient in kg? Is there a converstion formula?
Monday, January 23, 2012 at 4:17pm by Sara

chemistry
A solution contains 10.05 grams of an unknown covalent substance in 50.0 grams of water. The freezing point of this solution is (-) 3.16o C. What is the formula weight of the unknown compound? Below is what I tried, but don't know what to do next. Please explain step-by-step. ...
Friday, October 11, 2013 at 3:33am by Anonymous

physics
if you attach a mass to the spring from its initial equilibrium position, it vibrates forever in simple harmonic motion. Why doesn't it come to rest after stretching by a distance 'd'; proportional to the weight of the mass, when the spring's restoring force cancels out the ...
Saturday, February 26, 2011 at 7:46pm by calous --- HELP PLEASEE!!!

physics
if you attach a mass to the spring from its initial equilibrium position, it vibrates forever in simple harmonic motion. Why doesn't it come to rest after stretching by a distance 'd'; proportional to the weight of the mass, when the spring's restoring force cancels out the ...
Sunday, February 27, 2011 at 12:45pm by ashley --- HELP PLEASEE!!!

physics ...plzzzz help...
1 ) If the mass of the Moon is 7.4 x 1022 kg and its radius is 1.74 x 106 m, compute the speed with which an object would have to be fired in order to sail away from it, completely overcoming the Moons gravity pull. 2 ) Show that if a satellite orbits very near the surface ...
Monday, May 28, 2012 at 9:05pm by rachel

physics
A roller-coaster car of mass 1.80 103 kg is initially at the top of a rise at point circle a. It then moves 40.8 m at an angle of 50.0 below the horizontal to a lower point circle b. (a) Find both the potential energy of the system when the car is at points circle a and ...
Tuesday, March 4, 2014 at 11:26pm by sarah

Physics SHM
An automobile can be considered to be mounted on four identical springs as far as vertical oscillations are concerned. The springs of a certain car are adjusted so that the oscillations have a frequency of 4 Hz. (a) What is the spring constant of each spring if the mass of the...
Wednesday, April 4, 2007 at 4:08am by COFFEE

physics
Find the coefficient of static and kinetic friction of a block on a table surface. The mass of the weight is 200g and with the friction block overall the mass is 0.3 kg. With a spring scale we found Fs to be 1N and Fk to be 0.8N. Draw free body diagram.
Monday, January 28, 2013 at 10:10pm by Mary

% Recovery
How do you calculate percent recovery? I have this info: Weight of sample used: 0.198g Actual weight of sample: 0.325g Other info needed? What you have posted is confusing. What do you mean by "actual weight of sample?" Is that different than the weight of sample used? I ...
Monday, February 19, 2007 at 5:57pm by Anonymous

Physics
additional volume of water displaced = .0234 * pi * .0425^2 = 1.33*10^-4 m^3 density of water = 1000 kg/m^3 approx so mass of rock = 1.33*10^-1 Kg weight of rock = m g = 9.81*.133 = 1.3 Newtons
Sunday, June 17, 2012 at 6:13pm by Damon

physics
A ball of mass 0.35 kg is fired with velocity 157 m/s into the barrel of a spring gun of mass 1.8 kg initially at rest on a frictionless surface. The ball sticks in the barrel at the point of maximum compression of the spring. No energy is lost to friction. What fraction of ...
Sunday, November 1, 2009 at 12:01am by kevin

Physics
A ball of mass 0.30 kg is fired with velocity 100 m/s into the barrel of a spring gun of mass 2.2 kg initially at rest on a frictionless surface. The ball sticks in the barrel at the point of maximum compression of the spring. No energy is lost to friction. What fraction of ...
Wednesday, March 28, 2012 at 1:14am by Danielle

Physics
v =v(o) gt, v(o)/2 = v(o) gt, t = v(o)/2g. h = v(o)t gt^2/2 = v(o)^2/4g Acceleration due to gravity on the Moon is g = GM/R^2, where mass and radius of the Moon are M = 7.3310^22 kg, R =1.7410^6 m G =6.6730010-11 m^3kg^-1 s^-2
Saturday, April 28, 2012 at 12:38am by Elena

physics
weight= m*9.8N/kg weight in pounds= .454*massinKg
Wednesday, October 28, 2009 at 6:36pm by bobpursley

Physics
The volume of water displaced weighs 80 N, and has a mass of 80 N/g = 8.16 kg. That amount of water occupies 8.16 liters, or 8.16*10^-3 m^3, and equals the volume of the object. So the object's density is [340 N/g]/8.16*10^-3 m^3 = 4250 kg/m^3 The weight reduction in oil is 5/...
Tuesday, July 22, 2008 at 10:28pm by drwls

physics
You multiply, not divide, mass by gravity to get weight, which is a force. Mass is a characteristic of the material. It is the same here and on the moon or anywhere. Weight, the force the mass exerts down on a scale, depends on the local gravitational acceleration and is for ...
Sunday, January 23, 2011 at 2:41am by Damon

science (physics)
Weight = mg m=Weight/g=3920/9.8=... (kg)
Thursday, January 24, 2013 at 8:47pm by Elena

PHYSICS
Zach, whose mass is 67 kg, is in an elevator descending at 12 m/s. The elevator takes 3.5 s to brake to a stop at the first floor. (a) What is Zach's apparent weight before the elevator starts braking? (b) What is Zach's apparent weight while the elevator is braking?
Sunday, June 19, 2011 at 9:24pm by kate

Chemistry
You need to know the mass of the radiator fluid, take 50% for mass ethylene glycol and 50% H2O. Then mols glycol = grams/molar mass molality = mols glycol/kg solvent delta T = Kf*m Subtract delta T from 0 for new freezing point. For boiling point, mols is same, m is same, ...
Thursday, January 24, 2013 at 7:13pm by DrBob222

Physics
A 9.3 kg mass is attached to a hanging vertical spring with k=49 N/m. If the mass is released when the spring is unstretched, how fast will it be moving as it falls past the equilibrium point?
Wednesday, February 13, 2013 at 10:06pm by Jane - help!

Math Ms. Sue please
2. Find the outlier in the data set and tell how it affects the mean. 4, 4, 6, 2, 14, 1, 1 (1 point) 6; it raises the mean by about 1. 6; it lowers the mean by about 1. 14; it raises the mean by about 1.9. 14; it lowers the mean by about 1.9. 5. 22.6 is an outlier for ...
Friday, March 8, 2013 at 7:37pm by Delilah

Physics
Ive calculated in SI units: D=21 ft =6.4 m => R= 3.2 m (outer radius of the tank) h= 0.5 in= 0.0127 m, ρ1 =150 lb/ft³=2403 kg/m³ (this is not steel. It may be duralumin) ρ2 =1000 kg/m³ (water) V=0.85V2 V1=4πR³/3=4π3.2³/3=137.26...
Monday, July 9, 2012 at 10:34pm by Elena

Physics
You pull downward with a force of 27 N on a rope that passes over a disk-shaped pulley of mass 1.3 kg and radius 0.075 m. The other end of the rope is attached to a 0.61 kg mass. Find the tension in the rope on both sides of the pulley. I found that the tension on the side you...
Sunday, March 21, 2010 at 11:51pm by Mary

Physics
a frictionless roller coaster car of mass m = 719 kg tops the first hill with speed v0 = 15.2 m/s at height h = 48.9 m. How much work does the gravitational force do on the car from that point to (a) point A, (b) point B, and (c) point C? If the gravitational potential energy ...
Wednesday, March 7, 2012 at 9:40am by Brando

Physics
A 17.0 kg monkey hangs from a cord suspended from the ceiling of an elevator. The cord can withstand a tension of 220N and breaks as the elevator accelerates. What was the elevator's minimum acceleration (magnintude and direction)? Please show me how to do this in addition to ...
Tuesday, January 2, 2007 at 9:14pm by Kelly

physics
The British Sovereign coin is an alloy of gold and copper having a total mass of 7.988 g and is 22-karat gold. (a) Find the mass of gold in kg using that # of karats = 24 x (mass of gold)/(total mass). (b) Calculate the volumes of gold and copper used to manufacture the coin...
Monday, February 4, 2013 at 11:05am by anon

thermodynamics
c) Your "density" is a weight density. The mass density is (weight density)/g = 0.9405 slug/ft^3 Total volume is (mass)/(mass density) = 0.311 slug/0.9405 slug/ft^3 = 0.3307 ft^3 Note: the correct value of g at the surface of the Earth is 32.2 ft/s^2, not 31.9. I will use your...
Saturday, December 8, 2012 at 12:57am by drwls

Physics
The artificial sweetener NutraSweet is a chemical called aspartame (C14H18N2O5). (a) What is its molecular mass (in atomic mass units)? u (b) What is the mass (in kg) of an aspartame molecule? kg I know I have to get the totally mass of the aspartame, but I'm unsure how to ...
Saturday, April 19, 2008 at 12:50pm by Ron

Chemistry
mass Pb = 2.46g. mass S = 3.22-2.46 = ? Convert 2.46g to mols. mol = g/atomic mass mols S = (3.22-2.46)/atomic mass S. Now find the ratio of the elements to each other to determine the empirical formula.
Wednesday, October 17, 2012 at 8:22pm by DrBob222

phsyics
A mass, m1 = 9.36 kg, is in equilibrium while connected to a light spring of constant k = 112 N/m that is fastened to a wall. A second mass, m2 = 6.71 kg, is slowly pushed up against mass m1, compressing the spring by the amount A = 0.201 m The system is then released, and ...
Thursday, November 5, 2009 at 11:43pm by Anonymous

PHYSICS
Before the 3 kg weight was added, the period was P = 2 pi sqrt(m/k) = 0.628 s. When you add 3 km, the total mass is quadrupled and the period is increased by a facgtor of sqrt4 = 2. The new period is P = 1.257 s. The new frequency is 1/P = 0.796 Hz With the mass added at the ...
Thursday, December 24, 2009 at 1:57pm by drwls

physics (Newton's law of gravitation)
Can anyone please help me with this question? I am really confused. A neutron star and a black hole are 2.400e+12 m from each other at a certain point in their orbit. The neutron star has a mass of 2.781030 kg and the black hole has a mass of 9.941030 kg. What is the ...
Sunday, April 21, 2013 at 9:57pm by Kathy

PHYSICS PLEASE HELP !!!!!
A mass of 6 kg is tied to a 2 meter long rope and is swung in a vertical circle. At the bottom of the circle, the mass is moving at a speed of 16 m/s. What is the tension, in Newtons, in the rope after the mass has traveled to a point exactly halfway between the top and bottom...
Thursday, October 27, 2011 at 2:48pm by Amanda

math
a class consists of 24 boys and 16 girls.the average weight of the class is 41.7 kg,and the average weight of the boys is 41.1 kg.Find the average weight of the girls.
Saturday, November 24, 2012 at 9:49am by wan

Physics
A 6-kg clay ball is thrown directly against a perpendicular brick wall at a velocity of 22 m/s and shatters into three pieces, which all fly backward, as shown in the figure. The wall exerts a force on the ball of 2430 N for 0.1 s. One piece of mass 2 kg travels backward at a ...
Thursday, October 7, 2010 at 9:00am by Tim

CHemistry....
Formula : Tf = Kf * m Where Tf = Depression in the freezing point m = molality Kf = molal depression constant For water it is 1.86 0C/ m Tf = Tpure - Tsolution = 0 0C - ( --23.30C) = 23.30C m = no.of moles / mass of solvent = mass in g of solute / 62.068 g /mol * 9.6 Kg...
Saturday, January 24, 2009 at 1:06pm by Casandara

Physics
A pendulum of length L=26.0 cm and mass m= 168 g is released from rest when the cord makes an angle of 65.2 degrees with the vertical. A) how far (m) does the mass fall before reaching its lowest point? My work: .26m - .109 = .151 m B) how much work (J) is done by gravity as ...
Thursday, May 26, 2011 at 8:19pm by Casey

AP Physics
Hardly anyone uses Megagrams for mass. Mass of Car: 1500 kg Weight = M*g = 14,700 N Component parallel to incline = 14,700 sin25 = 621 N The coefficient of friction does not affect the answer, but does determine if the tires slip, and affects the acceleration.
Wednesday, October 31, 2012 at 11:50pm by drwls

physics
A large, solid metal sphere is suspended from a the ceiling by a cable, and is free to rotate about the wire. If the mass of the sphere is 176 kg, its radius is 0.7 m, and it is initially rotating at 28 rpm (revolutions per minute), what work is required to increase its ...
Tuesday, November 15, 2011 at 9:06am by john

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