Search: physics- density

Number of results: 99,654

physics
Height will be proportional to g, and pressure, and inversely to density. Height=k g * P/density At Earth 2185mm=k g 101.3kPa/density at X 725mm=k *g/4 * PressureX/density Divide the top equation into the bottom.. 725/2185=1/4 * PressureX that gives you pressurex Now for ...
Tuesday, November 13, 2007 at 7:57pm by bobpursley

physics
a) How far does it have to fall? Assume one meter. Don't forget there is a buoyancy effect. Net downward force is [1.05*density)*V - (density)*V]*g = M*a = (1.05)*density*a "density" is ambient density a = (0.05/1.05) g = 0.47 m/s^2 (1/2) a t^2 = 1 m when t^2 = (...
Sunday, May 8, 2011 at 11:28pm by drwls

physics
An object will float if its' density is less than the density of the fluid it is placed in. Density = 5.4g / 2.7cm^3 = 2g/cm^3. Density of water = 0.99g/cm^3. The object will not float , because its' density is greater than the density of water.
Tuesday, May 17, 2011 at 1:47pm by Henry

Physics
The density of the sphere is 1/2 of the density of water. But when oil is added to the water, the resulting solution has a density twice that of water. So the new density ratio is 1/4.
Sunday, May 6, 2012 at 12:08am by Henry

physics
NOTE: Do = Density of object(ice). Df = Density of fluid. Db = Density of bear.
Thursday, February 9, 2012 at 9:06am by Henry

Physics
All you need to answer that is the amount submerged in water, and the density of water. According to Archimedes Principle: (Water density) * 0.68 V = (wood density)* V Cancel out the V and use the density of water 1.00 g/cm^3 * 0.68 = wood density
Tuesday, November 17, 2009 at 12:44am by drwls

AP Physics
b) figure the height if the air density was the average of 1.3 and 0, or 1.3/2 h*area*density*g=101300N*area h= 101300/(g*density) in meters
Thursday, December 3, 2009 at 6:23pm by bobpursley

science(physics)
Density is the ratio of mass to volume. Mercury has a density of 1.36 x 10^4 kg/m^3. What is the density of mercury in units of g/cm^3?
Wednesday, September 5, 2007 at 10:07am by jen

physics
a) (density)*g*(elevation change) = 1.00*10^3 kg/m^3*9.8 m/s^2*1532 m = 15.0*10^6 Pascals That is about 150 atmospheres. b) Velocity = (Volume flow rate)/Area c) Add (1/2)*(density)*V^2 dynamic pressure to the answer in (a) The density here is the density of water . Air has a ...
Wednesday, December 29, 2010 at 3:18pm by drwls

Physics
(a) Subtract (density)*g*h from the pressure in the floor below. h = 6.5 m density = 1000 kg/m^2 g = 9.8 m/s^2 (b) The pressure at a height H above the first floor is 1.70*10^5 N/m^2 - (density)*g*H Set (density)*g*H = 1.70*10^5 N/m^2 and solve for H
Saturday, November 3, 2007 at 9:02pm by drwls

Physics
The actual mass of the cylinder is (density)*(volume) = 2700 kg/m^3*3.8*10^-5 m^3 = 0.1026 kg and its weight is M g = 1.007 N The reduction in weight when immersed, 0.426 N, equals the buoyancy, which is the displaced fluid weight. The density of the fluid is given by (density...
Tuesday, November 23, 2010 at 3:10am by drwls

physics
Sorry, still confused. I get that the density for mercury is 13.6x10^3 kg/m^3. All I know is that the answer is 4.08m, I just don't know how to get there. Do I use P=density*gravity*height h=pressure/density*9.8 but my answer didn't even come close to 4m
Wednesday, December 12, 2012 at 11:09pm by Help!

chemistry
Determine the density of each. density = mass/volume. The liquid with a density less than 1.00 (the density of water) will float.
Saturday, June 25, 2011 at 10:18pm by DrBob222

physics
Density? What was the original volume? Assuming the density of the boat to be originally about .50, then volume= 105kg/.5=210liters Then new density is 100kg/210liters=.476
Monday, January 31, 2011 at 3:07pm by bobpursley

Physics
IT adjusts its density by adding or removing water ballast, so that the density of the submarine = density water, and the sub the has no net weight, nor no net upward force.
Thursday, November 11, 2010 at 12:30pm by bobpursley

physics
downward force= mg upward force= Eq so what is the mass? density*volume so you need the density of the oil q=density*volume*9.8/490 coulombs number electrons= q/e
Friday, June 29, 2012 at 6:15pm by bobpursley

physics
R = outer radius r = inner radius (of spherical cavity) Sphere weight = buoyancy force (4/3) pi (R^3 - r^3)*(density of Al)*g = (4/3) pi R^3 * (density of water)*g (4/3) pi R^3 * (density of water) = 1.22 kg (Use the second equation to solve for R) The (4/3) pi g cancels out ...
Tuesday, October 5, 2010 at 12:44am by drwls

Physics
weight displaced salt water= bouyancy force Volume displace*densityseawater*g=bouyant force (4E-2m^3*density*g+.8*76/980*g)= 76g+ 4*E-2*density*g check that and solve for density. Notice the g factor divides out.
Friday, January 29, 2010 at 2:48pm by bobpursley

physics
Compute the pressure change at depth of 33.0 m. It's about 3.3 times higher than the pressure at the surface (density change)/density = change in pressure)/E Where E is the bulk modulus. It's going to be a very small number: roughly 10^-5. For the last part of the ...
Sunday, April 13, 2008 at 12:45am by drwls

chemistry
Density of water: 1.0 g/mL Principle: If an objects density is greater than water density, it will sink in water. If an object's density is lower than water density, it will float in water. Now, what will the liquid do? (I think you can figure it out from what I said above...
Monday, September 1, 2008 at 12:55pm by ~christina~

physics
Density=mass/volume Density=100grams/50 cu.cm Density=2gm/cu.cm
Thursday, April 21, 2011 at 12:16pm by rex

science (density)
1) mass=100g, volume=10ml,density= 2) volume=7ml, mass=70g, density= 3) mass=50g, volume=10cm3, density= 4) volume=30cm3,mas=90g,density= 5) mass=120,volume=6ml,density= Thanks everyone i apresheate your help.
Thursday, October 9, 2008 at 4:37pm by Carly

physics
a) what is the density of a log floating in salt water if 42% of its volume is exposed? The density of salt water is 1025 kg/m^3 (b) What is the density of a sample of metal that sinks in water at 7.2 m/s^2
Sunday, November 22, 2009 at 2:58pm by Sandhya

chemistry
I would look up the density of the solvents. I would assume a density of 1.00 g/cc for water since the problem specifies a dilute solution, then compare the density of the solvent with the density of water. Density greater than water the solvent sinks. Density lower than water...
Tuesday, September 23, 2008 at 5:25pm by DrBob222

Physics
You will find the volumetric thermal expansion coefficient of lead is 87*10^-6 C^-1 Multiply that by 90 C for the relative volume increase factor, DeltaV/V = 0.0078 Add that to 1 and take the reciprocal Density(90)/Density(0) = 0.9922 Finally, multiply that by the density at 0 C
Wednesday, November 14, 2012 at 12:21am by drwls

physics
if relative density (to water) is 6.5, then the actual density is 6.5g/cm^3 mass= density*volume= 6.5g/cm^3 * (20cm)^3 volume= mass/density= 13000/6.5 cm^3
Wednesday, November 16, 2011 at 4:50pm by bobpursley

physics
D. None of these. The density of the object must be equal to density of water. t
Tuesday, March 20, 2012 at 12:15pm by Henry

chemistry
The general gas law equation, PV = nRT, can be modified for density, so that one can calculate density without actually going through n. P*molar mass = density*R*T. Remember T must be in K. Solve for density.
Wednesday, November 30, 2011 at 3:17pm by DrBob222

Physics
yes P V = n R T density proportional to n/V n/V = P/(RT) so at constant T, density goes down with pressure.
Saturday, February 18, 2012 at 5:53pm by Damon

Physics
You do not say what is in the balloon. Is it Helium, Hydrogen, or hot air? In any case use Archimedes who is very good at lifting things. Force up = volume of air displaced times density of air times gravity, (4/3)pi r^3 * density of air at 20 degrees C * g Weight of interior ...
Friday, March 15, 2013 at 4:07pm by Damon

Physics
Estimate the density of the water 6.0 deep in the sea. By what fraction does it differ from the density at the surface?
Tuesday, November 15, 2011 at 7:51pm by Anonymous

Physics
P + (1/2)(density)V^2 is the same for both ends P1 - P2 = (1/2)(density)(V2^2 - V1^2))
Thursday, December 16, 2010 at 5:34pm by drwls

physics - density
how do fish use density in their lives?
Thursday, November 13, 2008 at 2:02am by alexa

physics
I think you mean the object it totally immersed in water, not the other way around. The buoyant force is the weight of the water displaced, which is (water density)(volume)*g = 2.3*10^-3 m^3*1.00*10^3 kg/m^3*9.8 m/s^2 = 22.5 Newtons The density is (26,000 g)/(2.3^10^3) cm^3 = ...
Sunday, November 14, 2010 at 5:38am by drwls

Physics: Buoyancy
bouyancy=MassSteel/density steel * density water tension=23000kg-bouyancyabove
Sunday, January 27, 2013 at 11:40pm by bobpursley

physics ( DENSITY )
Assume that the density of a human is 1.13 g/cm3. What is the volume of a 51.5 kg person?
Thursday, May 31, 2012 at 7:31pm by alyssa

Physics
What is the acceleration of an 0.4m aluminum cube with a density of 2.72 in a beaker of methanol, which has a density of .791?
Wednesday, February 1, 2012 at 4:29pm by Daisy

Physics
totalweight= densityEarth*volume = density*141*60*6.0 m^3 and the density=2.8g/cm^3 which is 2800kg/m^3
Tuesday, November 3, 2009 at 10:12pm by bobpursley

Physics
i'm having trouble with this Which of the following statements about floating objects is correct? a. the object's density is greater than the density of the fluid on which it floats b. the object's density is equal to the density of the fluid on which it floats c. ...
Friday, February 20, 2009 at 5:28pm by Bella

Physics
If you change the density to kg/m^3, it will be 7.9E6kg/m^3 mass=density*volume I have no idea what you mean "bottle"
Monday, September 19, 2011 at 8:37pm by bobpursley

Physics
oh yes, multiply the density by the gravational field constant to convert kg to N. Pressure= density*g*height + atmospheric
Tuesday, January 19, 2010 at 4:11pm by bobpursley

Physics
The volume is, of course, V (4/3)pi*R^3. You will have to look up Saturn's mass, M. It is easily Googled. The average density is M/V You should find that it is about 2/3 of the density of water. For additional help, http://www.universetoday.com/15322/density-of-saturn/
Friday, March 9, 2012 at 11:50am by drwls

Physics i.e science
assume the volume is V density water=85/V V=85/densitywater density kero=75/V density kero=75*densitywater/85 but density water=1gm/cc so do the figuring.
Tuesday, February 14, 2012 at 8:48am by bobpursley

physics help
Weight = (Air Density)*Volume*g Volume = (base area) x Height The density of air that they told you to use is wrong. Are you sure you copied it correctly? It should be about 1.29 kg/m^3 I have my doubts about the quality of the physics education you are getting. They gave you ...
Sunday, March 20, 2011 at 10:53pm by drwls

physics
heat=mass*specificeheat*changetemp = 500gal*Density*1BTU/lb*90F density=8.3lbm/gal
Sunday, November 25, 2012 at 3:13pm by bobpursley

physics
Multiply the volume of that cylinder by the density of water. Your density is ten times too low. You'd better check it again.
Sunday, September 19, 2010 at 1:43am by drwls

chemistry
density = mass/volume Specific gravity is the same number (but no units) if you assume density of H2O = 1.00 g/mL. If you know the density of H2O at room T (I don't know what you're calling room T) then sp.g. = density substance @ T/density H2O at same T.
Sunday, September 9, 2012 at 11:25pm by DrBob222

physics
Gauge Pressure(P) = Density(p) x gravity(g) x height(h) 1.33x10^4Pa = 1.02* x 9.8m/s x h *: Specific gravity = ratio of density of solution to water .:. Density = 1.02(no units) .:. h = 1.33x10^4 / 1.02 x 9.8 = 1330.5m^3 = 1.33m
Sunday, December 16, 2007 at 6:22pm by Alan

physics
(a) No, you have density (D) in the wrong place. For freshwater, D = 1000 kg/m^3 Volume *(water density) = Mass of boat (b) (reduction in mass) = density * (reduction in volume). 20% of the original mass should be thrown out.
Tuesday, December 8, 2009 at 11:18pm by drwls

physics
In reality, the pressure loss due to the tubing is significant, but well ignore this. weight of a column blood h height, and area A weight=density*Volume*g=density*A*h*g pressure=weight/area=density*g*h
Tuesday, October 26, 2010 at 10:32am by bobpursley

physics
You need the density of iron, mercury, at each temperature, or have the coefficent of volume expansion and then figure the density at the second temp.
Thursday, September 4, 2008 at 8:59pm by bobpursley

Physics
Buoyancy force = 0.103 N 0.103 N = V*(water density)*g 0.852 N = V*(object density)*g (Object density)/(water density) = 8.27 Object density = 8.27*10^3 kg/m^3 Object volume = V = 0.852/[9.81*8.27*10^3)] = 1.05*10^5 m^3 = 10.5 cm^3
Saturday, January 28, 2012 at 10:05pm by drwls

physics
No. The bouyancy is equal to volume*densitywater(g). Supported Weight=bouyancy-weightmat mg=volume*density*g-3.5kg masssupported=volume*densiy -3.5kg where density is the density of water.
Monday, January 19, 2009 at 3:51pm by bobpursley

Physics
Look up the density of saltwater and the density of fresh water. The ship will sit higher in the liquid with greater density. The density of the water displaced times the volume of the water displaced is equal to the weight of the ship. A fluid with a greater density will ...
Tuesday, December 18, 2012 at 8:03pm by Jennifer

Physics
density Al * volume Al = density Cu * 1 cm^3 make sure density of Al is in g/cm^3
Monday, February 27, 2012 at 6:07pm by Damon

physics
mass of an unknown sample is 0.240 kg in air and 0.208 kg when in oil of density=800 kg/m^3. Determine volume and density. Is the density 0.240/800?
Tuesday, December 18, 2012 at 5:37pm by Helen

Physics
mass of an unknown sample is 0.240 kg in air and 0.208 kg when in oil of density=800 kg/m^3. Determine volume and density. Is the density 0.240/800?
Saturday, December 15, 2012 at 10:29pm by Helen

physics--pressure
how high would the atmosphere extend if it were of uniform density throughout, equal to half the present density at sea level?
Sunday, March 22, 2009 at 8:35am by lisa

Physics
Molar Density = P/RT At 298 K and 1 atm, both gases would have the same number or molar density. The MASS density of Ne is 20.2/4.0 = 5.05 times that of He, because of its higher atomic weight. To equal the MASS density of He, the Ne would have to have 5.05 times the absolute ...
Monday, December 3, 2012 at 6:19am by drwls

Physics
You will need to first calculate the number density of free conducting electrons. Call it N. It equals the number density of copper atoms. You can get that from the density of copper and the atomic weight. For the drift velocity V, use the equation N*e*V*A= 3.2*10^-10 coulombs...
Saturday, November 10, 2012 at 9:17pm by drwls

physics
a physics book has a height of 26cm, a width of 23cm, and a thickness of 3.9cm. what is the density of the physics book if it weighs 17N? the acceleration of gravity is 9.81m/s^2. answer in units of kg/m^3 i know density=mass/volume but it says to answer in units of kg/m^3... ...
Monday, January 19, 2009 at 3:45pm by Claudia

physics
The specific gravity must be between 1.00 and 0.79 if it sinks in water but not in alcohol. The apparent mass in alcohol is V*(wood density) - V*(alcohol density) = 0.040 kg ..after subtracting the bouyant force. Wood density = alcohol density + 0.040 kg/V = 790 kg/m^3 + 0.040...
Thursday, November 27, 2008 at 6:20pm by drwls

science
Find the Density, which is equal to mass/volume, and use the equation density of the block/ density of water. If the density of the block is lower than water, then it will float, if not then it will sink or be submerged. To calculate the density of the block take the weight ...
Thursday, January 17, 2013 at 9:15pm by Devron

college physics
Assumeing density is the same. MassA=density*4/3 PI ra^3 MassB= density*4/3 PI rb^3 divideing the second by the first 8=(rb/ra)^3 It sure looks like the ratio of rb/ra is 2. check my work.
Tuesday, January 19, 2010 at 7:21pm by bobpursley

science
Personally, I don't think using density as a guide for buying cereal is worth the time it takes to estimate the density. Cereal is sold by the weight, not density. It may be true that cereal with a high density makes one feel full where a lower density cereal doesn't. ...
Saturday, January 9, 2010 at 1:11pm by DrBob222

physical science
Calculate the density of the object. density = mass/volume. You have the mass, the volume of a cube is side^3 so that is 5^3 or 125 cm^3. If the density is greater than the density of water it will sink; otherwise, it will float.
Wednesday, April 15, 2009 at 8:00pm by DrBob222

chemisrty
can anybody give me the density of arsenic oxide at STP is this the correct formula volume = mass/ density thanks Yes, but if you want the density, it is density = mass/volume. The number I have seen floating around on this board is 17.8 g/L but the density of a gas and the ...
Sunday, February 4, 2007 at 2:34pm by bex

physics
Tension = Bouyancy force - ballon weight - helium weight. = [V(air density - helium density) + ballon mass)]*g V = (4/3) pi R^3 g = 9.8 m/s^2 By multiplying by g, you get the answer in Newtons, which is probably what they want. For the air density, which you need, they should ...
Monday, December 20, 2010 at 3:24pm by drwls

SCIENCE?CHEMISTRY***
The volumes are the same. Volume in mass divided by density. (mass/density) of mercury = (mass/density) of alcohol Alcohol mass = [(alcohol density)/(mercury density)]*(mecury mass) = (0.900/13.6)*20 = 1.324 g Rouded to two figures, that is 1.32 g
Friday, May 14, 2010 at 9:49pm by drwls

science/math please help
density = mass/volume density = 500 / 250 density = 2 g/mL
Tuesday, August 23, 2011 at 1:53am by Jai

Chemistry
I would calculate the density (density = mass/volume) and compare to the density of the four possibilities.
Saturday, November 20, 2010 at 7:34pm by DrBob222

Chemistry
You don't have enough information. You need the density of benzene, the density of CH3CN, and the density of the solution.
Tuesday, September 2, 2008 at 2:45pm by DrBob222

physics
Find the weight of a column of water A in area, h high. weight= densitywater*g*area*height but pressure= weight/area= density*g*h but one wants an additional 40psi, so that has to be added.. pressure=density*g*h+ 40lbs/in^2* so solve. Watch units. I would work it in English, ...
Saturday, October 30, 2010 at 5:34pm by bobpursley

Physics
The bulk modulus is E = 2.2*10^9 Pa The fractional change in volume is: dV/V = P/E = 1.16*10^8/2.22*10^9 = 0.0523.. which is a 5.2% decrease in volume (and increase in density) (a) A cubic meter (at the surface) becomes 0.948 m^3. (b) Look up the density of ocean water and ...
Tuesday, July 13, 2010 at 8:14am by drwls

chemistry
given the density of helium is 0.1785g/cm3 and the density of argon is 1.784g/cm.3 estimate the density of neon
Sunday, October 28, 2012 at 4:14pm by Jessa

Physics-Math
1.5 m3 of water is mixed with 0.50 m3 of alcohol. Density of water is 1000 kg m–3 and density of alcohol is 800 kg m–3. Whats the density of the mixture with volume 2.0 m3?
Tuesday, September 13, 2011 at 5:02pm by rohan

physics
A 650 kg weather balloon is designed to lift a 4600 kg package. What volume should the balloon have after being inflated with helium at 0 degrees celcius and 1 atm pressure to lift the total load? The buoyancy force must equal the weight lifted. Let V be the volume. g*[(He ...
Wednesday, May 9, 2007 at 3:30am by Anonymous

Physics
gravitational force=mg=volumebarrel*density*g =H*(D/2)^2*PI*density*g hydrostatic force= (H+1.60)4.6E-4*density*g this is the force on the column of water at the bottom. But due to Pascal's principle, that force is multiplied by the area of the barrel, so hydrostaticForce...
Monday, February 6, 2012 at 8:33am by bobpursley

Physics
The density of a gas at s.t.p is 1.3kg/m3. Find the density of the gas at -15 degree celcius and at a pressure of 8cmHg.
Wednesday, January 30, 2013 at 9:57pm by Esther

physics
mass= density*volume= density*thickness*PI*radius squared. solve for diameter (twice radius)
Thursday, May 31, 2012 at 7:22pm by bobpursley

physics
Use the metal's density, because you want the volume that the metal occupies or "displaces". You don't need the density of oil to answer the question.
Wednesday, December 26, 2007 at 10:25pm by drwls

Physics
There is a formula that relates radiation energy density to the E-field strength. Get to know it. Energy density = (1/2) epsilono * E^2 For an electromagnetic wave, there is an equal amount of energy in the magnetic field, as I recall. For the E-field energy density at a ...
Friday, April 17, 2009 at 10:51pm by drwls

Fluid ''Physics''
A block of metal floats in oil of density 700Kg/m3 with 3/4 of volume in mass. Find the density of metal.
Sunday, November 6, 2011 at 3:32pm by Said

physics
What is the density of an unknown spherical substance with mass of 30 g and radius of 0.35 inches in kg/m3? (density= mass/ volume)
Saturday, October 9, 2010 at 9:24pm by May

physics
The force on the bouy is density*g*PI r^2*x The "spring" constant then is f=kx or k=density*g*PI*r^2 The mass oscillating is M period=2PIsqrt(M/k)
Monday, November 30, 2009 at 6:58pm by bobpursley

Physics
Fresh water's density is 1000 kg/m^3. The average density of the mixture is 40*680 + 45*1000/95
Tuesday, November 10, 2009 at 9:51pm by drwls

physics
mass*gis the weight of the column density*h*area*g= weight density*h*g= pressure
Sunday, October 17, 2010 at 9:43pm by bobpursley

physics
1.5 m3 of water is mixed with 0.50 m3 of alcohol. Density of water is 1000 kg m–3 and density of alcohol is 800 kg m–3. Whats the density of the mixture with volume 2.0 m3?
Tuesday, September 13, 2011 at 6:16pm by lola

8th grade science
density = mass divided by volume. volume is the 10 liters and mass is the 8.20 kg. you take it on from there. AND the smaller the density, the more it will float, the larger the density, the more it will sink. so if the density of the crude oil is smaller than the water, it ...
Wednesday, March 24, 2010 at 9:41pm by blaise

physi
Weight of ice slab + weight of woman = buoyancy force (ice density)*V*g + Mg = (water density)*V*g [(Water density)-(Ice density)]*V = M = 45 kg V = 45 kg/[(Water density)-(Ice density)] = 45kg/(1000 - 917)kg/m^3 = 0.54 m^3
Tuesday, July 20, 2010 at 3:00pm by drwls

Physics
15E3 meters = 15km= 15*10^3 meters Mass Near= volume*density=XxYxZ*density you are given those dimensions.
Tuesday, December 13, 2011 at 10:02pm by bobpursley

physics
Mass is density times volume. I recommend that you look up the density of lead and do the work yourself. The volume should be written as 3 cm^3.
Sunday, April 24, 2011 at 6:57pm by drwls

physics
mercury has a density of 1.36x10^4 kg/m. what is the density of mercury in units f g/cm?
Monday, September 5, 2011 at 2:54pm by amira

Physics
density*Area*heigth*g=Pressure*A height= pressure/(density*g) check that.
Tuesday, April 6, 2010 at 4:43am by bobpursley

physics
Did u mean that the airship can float because the density of the airship is lower than the density outside?
Friday, April 10, 2009 at 7:46pm by KiWi

chemistry
Specific gravity (S.G.)=Density of acetic acid/density of H2O Solve for density of acetic acid. S.G.* density of H2O=density of acetic acid (0.1040*(0.9956 g/mL)=S.G.
Friday, February 1, 2013 at 1:55am by Devron

Chemistry
Look up the density of water at 20C and the density of water at 25C. They are not the same. Knowing that mass = volume x density, then density = mass/volume. The volume you calculate for the flask will be different and that will cause the density of your determination to be ...
Tuesday, September 27, 2011 at 3:51pm by DrBob222

chemistry
actually, the specific gravity is the ratio of the density of oil to the density of water. Since the density of water is 1g/ml, the density of a substance is numerically the same as the specific gravity. However, specific gravity is a dimensionless number, while density has ...
Tuesday, February 19, 2013 at 2:34pm by Steve

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