Monday

April 21, 2014

April 21, 2014

Number of results: 32,238

**chemistry**

Two liquids of different densities (ρ1 = 1500 kg/m3, ρ2 = 500 kg/m3) are poured together into a 100 L tank, filling it. If the resulting density of the mixture is 800 kg/m3, find the respective masses of the liquids used.
*Wednesday, August 29, 2012 at 3:56pm by nick*

**science**

Why do u think the vial of water in plain ice didn't freeze, bu the vial of water in salted ice did freeze?? People put salt on ice when they make ice cream. Why do they do that?
*Sunday, March 2, 2008 at 6:58pm by Melony*

**Physics**

The heat of fusion of 334 J/g (or kJ/kg) is a measured quantity. Usually that value is used to determine the heat needed to melt ice; e.g., q = heat required to melt 25 g ice = 25 g x 334 J/g = ?? J.
*Tuesday, June 30, 2009 at 3:31pm by DrBob222*

**chemistry**

Note the correct spelling of celsius. q to move temperature of ice from -58 to zero. q = mass ice x specific heat ice x [Tfinal-Tinitial]. Tfinal is zero and Tinitial is -58. q to melt the ice. q = mass ice x heat fusion. total Q = q1 + q2.
*Monday, June 28, 2010 at 12:05pm by DrBob222*

**thermal physics**

What mass (in grams) of steam at 100°C must be mixed with 340 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 12.0°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg, and the latent heat of ...
*Monday, March 23, 2009 at 6:36pm by chirayu*

**thermal physics**

What mass (in grams) of steam at 100°C must be mixed with 340 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 12.0°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg, and the latent heat of ...
*Wednesday, March 25, 2009 at 7:15am by chirayu*

**HELP URGENT Phyiics**

What mass (in grams) of steam at 100°C must be mixed with 446 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 65.0°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg, and the latent heat of ...
*Friday, April 12, 2013 at 5:44am by HELP*

**physical mod**

What mass (in grams) of steam at 100°C must be mixed with 462 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 40.0°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg, and the latent heat of ...
*Friday, September 13, 2013 at 2:43am by adrian*

**physics**

Betty Bodycheck (mB = 50.2 kg, vB = 22.0 km/h in the positive x-direction) and Sally Slasher (mS = 45.2 kg, vS = 28.0 km/h in the positive y-direction) are both racing to get to a hockey puck. Immediately after the collision, Betty is heading in a direction that is 76.0° ...
*Friday, February 10, 2012 at 2:11pm by sara*

**Physics - Radiation, Heat Transfer**

10 sq meters of ice is floating in the Arctic Ocean in mid-Sept - 12 hours of darkness, 12 hours of diffuse sunlight at 50 watts/sq meter. Emissivity of ice = .97 temperature of the top of the ice = -20 C (253 K) Albedo of sea ice = .62 How much radiant energy is absorbed by ...
*Sunday, January 27, 2013 at 4:55am by Robert RACookPE1978*

**Calculus (Derivatives)**

lim x>0 (-500/(x+h) - 500/x )/h = lim -500(x-(x+h))/h(x*(x+h) = lim -500 (-h/h(x*(x+h)) = lim +500 (1/x(x+h)) = 500/x^2 Your teacher is just too easy.
*Wednesday, November 9, 2011 at 7:05pm by bobpursley*

**physics**

A 1.3 Kg block of ice is initially at a temp of -5 degrees celsius. If 7.5 *10^5 J of heat are added to the ice, what is the final temperature of the system? I multiplied 1.3 Kg of ice by the specific heat of ice (2090), then I divided by the amount of heat added. I came up ...
*Friday, June 22, 2007 at 2:30pm by tasha*

**Physics- LOST!**

It isn't that hard if you think it through one step at a time. 80% of 500 W converted to heat is 400 W (Joules per sec) In one hour, that is 1 hr x 400 J/s x3600 s/hr= 1.44*10^6 J to be removed Each kg of water evaporated removes 2.42*10^6 J . So.. divide 1.44*10^6 J by 2.42 J...
*Monday, December 3, 2007 at 12:30pm by drwls*

**physics**

Two skaters, one with mass 62 kg and the other with mass 45 kg, stand on an ice rink holding a pole of length 10 m and negligible mass. Starting from the ends of the pole, the skaters pull themselves along the pole until they meet. How far does the 45 kg skater move?
*Tuesday, November 1, 2011 at 3:40pm by Jason*

**Science**

c(ice)= 2 060 J/kg•degr c(water)= 4180 J/kg•degr λ = 335000 J/kg Q=Q1+Q2+Q3 Q1=m•c(ice) •ΔT= 0.03•2060 • 20 =1236 J. Q2=λm=335000•0.03=10050 J Q3 = m•c(water) •ΔT=0.03•4180•20=2508 J Q=1236+10050+2508 =13794 J
*Sunday, July 1, 2012 at 11:10pm by Elena*

**Physics**

Sorry to double pos, I just really need hlp whit this. You push an air-hockey puck along a surface with negligible friction while riding in a truck as it moves at a constant velocity in Earth's frame of reference. What do you observe? Why? I'm tempted to say that the puck ...
*Sunday, March 1, 2009 at 4:42pm by Katja*

**chemistry**

I would multiply 8660 ft^3 x density ice (in lbs/ft^3) = total mass in pounds. Then pounds x 453.6 convert it to grams and divide by 1000 to convert to kg. You will need to look up the density ice in lb/ft^3 as I don't remember that number.
*Friday, September 14, 2012 at 3:15pm by DrBob222*

**12th Physics**

A 55 kg ice skater is at rest on a flat skating rink. A 198 N horizontal forceis needed to set the skater in motion.However, after the skater is inmotion, a horizontal force of 175 N keeps the skater moving at a constantvelocity. Find the coefficients of static and kinetic ...
*Tuesday, December 8, 2009 at 10:40pm by Melissa*

**math problem**

--There is a layer of ice four inches thick covering a small pond when the weather arrives and it begins to smelt. It smelts 1/16 inch the first day, 1/8 inch the second day. 1/4 inch the third day, and keeps doubling the amount melted each succeeding day. all the ice will be ...
*Sunday, November 11, 2012 at 4:34pm by Mark*

**science **

if all of the following imaginary planets were the same distance from the sun, which would experience the strongest force of gravity due to the sun? planet a: mass 3,500 kg planet b: mass 50,000 kg planet c: mass 750 kg planet d: mass 100,000 kg a)planet a b) planet b c) ...
*Tuesday, October 29, 2013 at 2:59pm by victoria*

**Physics**

Force and Motion: A 12 kg armadillo runs onto a large pond of level, frictionless ice. The armadillo's initial velocity is 5m/s along the positive direction of the x-axis. Take its initial position on the ice as being the origin. It slips over the ice while being pushed by a ...
*Wednesday, July 7, 2010 at 3:13pm by Rick*

**Physics**

A 43 g ice cube at 0 C is placed in 882 g of water at 81 C. What is the final temperature of the mixture? The specific heat of water is 4186 J/kg · C and its latent heat of fusion is 3.33 × 105 J/kg . Answer in units of C
*Tuesday, April 23, 2013 at 8:38pm by dallas*

**Chemistry - Melting Ice**

The heat of fusion of ice is 6.00 kJ/mol. Find the number of photons of wavelength = 6.78×10^−6 m that must be absorbed to melt 6.80 g of ice.
*Thursday, November 29, 2012 at 9:33pm by Jayden*

**Jake**

The ice melting tells you the amount of heat released. How much heat does it take to melt 7.893-7.393 kg of ice. Then, having the energy, you can determine enthalpy based on the moles of iron formed. The reaction is a little tricky to figure moles of iron, you have to ...
*Tuesday, October 16, 2007 at 6:52pm by bobpursley*

**Algebra 2**

an ice cream store has 31 flavors of ice cream and 10 toppings. A regular sundae has one flavor of ice cream, one topping, and comes with or without whipped cream. How many different ice cream sundaes can be ordered? I'm thinking 310 but how do i figure it out
*Saturday, December 15, 2007 at 8:56pm by Jon*

**Physics**

The question is: "A block of ice at 0oC is dropped from a height that causes it to completely melt upon impact. Assume that there is no air resistance and that all the energy goes into melting the ice. Show that the height necessary for this to occur is at least 34 km." I know...
*Wednesday, September 23, 2009 at 4:07pm by Ceres*

**physics**

An ice skater spins about a vertical axis at an angular speed of 15 rad s−1 when her arms are outstretched. She then quickly pulls her arms into her sides in a very small time interval so that the frictional forces due to ice are negligible. Her initial moment of inertia...
*Thursday, March 15, 2012 at 8:20am by swapnali*

**PHYSICS!**

In this case, not all of the ice melts. Let m be the number of grams of ice that melts. 115*81*1.0 = m*80 (80 cal/g is the heat of fusion) m = 116 g Note that is less than the amount of ice you started out with. So there is some ice left. Add that to the 115 g of liquid water ...
*Saturday, November 10, 2012 at 10:07pm by drwls*

**math**

a merchant buys 2 quantities of rice at Rs60 and Rs40 per kg respectively .He pays a total of Rs 1000.On the other hand he paid a flat rate of Rs 500 per kg.He would have paid 10% more.How many kg of each type of rice did he buy?
*Tuesday, August 7, 2012 at 7:59pm by TUHITUHI*

**physics help needed very urgent !!!**

The figure shows four penguins that are being playfully pulled along very slippery (frictionless) ice by a curator. The masses of three penguins and the tension in two of the cords are m1 = 10.5 kg, m3 = 14.7 kg, m4 = 22.05 kg, T2 = 120 N, and T4 = 236 N. What is the mass of ...
*Friday, October 19, 2012 at 5:55pm by some one *

**physics please help!**

(a) If the ice block is really "very large", not all of it melts, and the final temperature remains 0 C. You end up with a large pool of 0 C liquid water including melted ice) in the ice block. (b) If mass M of original ice melts, Heat lost by poured water = Heat gained by ...
*Friday, April 8, 2011 at 3:04am by drwls*

**Math 115**

19.5 t (1000 kg/t)= 19,500 kg
*Sunday, November 30, 2008 at 10:29am by Damon*

**physics**

A 1,600 kg car traveling north at 10.0 m/s crashes into a 1,400 kg car traveling east at 15 m/s at an unexpectedly icy intersection. The cars lock together as they skid on the ice. What is their speed after the crash?
*Friday, February 15, 2013 at 7:51pm by shaquille*

**physics**

A string can hold up to 12 kg without breaking. you tie the string to a 30 kg object sitting on ice and use it to pull the object horizontally for 22m. calculate the minimum possible time to complete the task.
*Saturday, October 26, 2013 at 6:35pm by Goku*

**Physics**

Betty Bodycheck (mB = 55.1 kg, vB = 22.0 km/h in the positive x-direction) and Sally Slasher (mS = 41.2 kg, vS = 28.0 km/h in the positive y-direction) are both racing to get to a hockey puck. Immediately after the collision, Betty is heading in a direction that is 76.0° ...
*Thursday, October 27, 2011 at 11:12pm by Jake*

**physics**

Betty Bodycheck (mB = 51.4 kg, vB = 22.0 km/h in the positive x-direction) and Sally Slasher (mS = 42.4 kg, vS = 28.0 km/h in the positive y-direction) are both racing to get to a hockey puck. Immediately after the collision, Betty is heading in a direction that is 76.0° ...
*Monday, October 8, 2012 at 5:50pm by kelly*

**Physics**

What is th mass in kg for a 10cm3 cube of ice?
*Wednesday, January 25, 2012 at 4:58pm by Breia *

**Physics**

What is th mass in kg for a 10cm3 cube of ice?
*Wednesday, January 25, 2012 at 4:58pm by Breia *

**chem**

Keq = (CO2)(H2)/(CO)(H2O) I assume by trial value of Keq you mean the reaction quotient. That sill be Kquo = (0.500)(0.500)/(0.300)(0.300) Kquo = 2.78. It doesn't match Keq of 10 and it is too low which means that the products are too small and the reactants are too large so ...
*Thursday, January 26, 2012 at 11:05pm by DrBob222*

**physics**

A uniform 2.00-m-long stick is raised at an angle of 30° to the horizontal above a sheet of ice. The bottom end of the stick rests on the ice. The stick is released from rest. The bottom end of the stick remains in contact with the ice at all times. How far will the bottom end...
*Thursday, April 1, 2010 at 6:08am by Sandhya*

**Marh**

For the nails in the bin below, there are 500 nails per kg.” Using this conversion factor, perform the following calculations. How many nails would you have if you had 0.15 kg?
*Monday, August 20, 2012 at 3:48pm by Lost*

**Chemistry - DrBob PLEASE**

A glass of ice water was made by adding six 25 g ice cubes to one liter of water. If the water was initially 25C and the ice cubes were initially at -15C, what is the final temperature of the ice water? (I don't know how to get it.)
*Monday, May 23, 2011 at 6:22pm by Jessica*

**Algebra 2**

An ice-cream parlor sells sundaes with 3 different types of ice-cream and 4 different toppings. They have 8 flavors of ice-cream and 10 toppings for their customers to chose from.what is the probability that a customer orders a sundae including chocolate and strawberry ice ...
*Thursday, May 24, 2012 at 11:41am by chels*

**Physics**

Yes, I think you are missing something. There is still heat in the steam which has now turned to water. It's temperature is 100 C so it can melt more ice. How much more? What mass of ice can that heat melt? mass ice x 334 = mass water x specific heat water x delta T. (The 100 ...
*Wednesday, September 23, 2009 at 1:27pm by DrBob222*

**math**

which Ice cream shop has the better buy? 1 pint of Ice Crean for 3.49 or 1/2 a gallon of Ice Cream for 13.85. show work
*Tuesday, January 12, 2010 at 8:57pm by Jordynn*

**Algebra!**

An ice cream parlor sells sundaes with 3 different type of ice cream and 4 different toppings. They have 8 flavors of ice cream and 10 toppings for their customers to choose from. What is the probability that a customer orders a sundae including vanilla ice cream and chocolate...
*Saturday, May 26, 2012 at 3:18pm by OLIO :) *

**Chemistry**

A glass of ice water was made by adding six 25 g ice cubes to one liter of water. If the water was initially 25C and the ice cubes were initially at -15C, what is the final temperature of the ice water?
*Friday, May 20, 2011 at 1:56pm by Mark*

**Chemistry**

A glass of ice water was made by adding six 25 g ice cubes to one liter of water. If the water was initially 25C and the ice cubes were initially at -15C, what is the final temperature of the ice water?
*Monday, May 23, 2011 at 6:13pm by Jessica*

**Physics**

Figure the heat in the iron. 250*spchatFe*(300-27) now the tricky part: the ice and water. heat to melt ice+water m*Lf + m*cwater*(27-0). This assumes the initial temperature of the ice was 0C. set the two heats equal, and solve for mass ice/water m.
*Sunday, November 17, 2013 at 4:59am by Anonymous*

**physics**

A speed skater moving across frictionless ice at 9.0 hits a 6.0 -wide patch of rough ice. She slows steadily, then continues on at 6.1 m/s. What is her acceleration on the rough ice?
*Tuesday, September 11, 2012 at 1:26pm by Kris*

**Physics**

A speed skater moving across frictionless ice at 9.0 hits a 5.1 -wide patch of rough ice. She slows steadily, then continues on at 6.4 . What is her acceleration on the rough ice?
*Monday, October 8, 2012 at 12:56am by Sabrina*

**Chemistry**

q1 = heat to raise T of solid ice from -8 to zero C. q1 = mass ice x specific ice x (Tf - Ti) where Tf is 0 C and Ti is -8 C. q2 = heat to melt ice at zero C to liquid H2O at zero C. q2 = mass ice x heat fusion q3 = heat to raise water from zero C to final T. q3 = mass H2O x ...
*Saturday, November 3, 2012 at 8:04pm by DrBob222*

**chemisrty**

Note the correct spelling of celsius. q = heat to move the temperature of 445 g ice from -58 to -29. q = mass ice x specific heat ice x (Tfinal-Tinitial) = ??
*Sunday, March 22, 2009 at 9:42pm by DrBob222*

**physcial science**

How to solve for Jane (mass 40 kg),standing on slippery ice, catches her leaping dog (mass 15 kg) moving horizontally at 3 m/s. What is the speed of Jane and her dog after the catch?
*Saturday, February 12, 2011 at 12:22am by Cindy*

**physics**

Water with a mass of 0.500 kg at 15.0 degree C is mixed with 0.800 kg of water at 35.0 degree C. What is the final temperature T_f of the mixture?
*Tuesday, April 3, 2012 at 8:50pm by christy*

**Physics**

Take two Styrofoam cups, partially fill them with equal amounts of cold water, and drop equal amounts of ice into each cup to obtain a mixture of ice and water. a. Stir the water and ice mixture in one of the cups vigorously with a nonmetallic stirrer until all of the ice has ...
*Tuesday, December 28, 2010 at 12:31pm by Katherine*

**Physics**

A speed skater moving across frictionless ice at 8.0 m/s hits a 5.7m-wide patch of rough ice. She slows steadily, then continues on at 6.5m/s. What is her acceleration on the rough ice?
*Monday, August 27, 2012 at 4:35pm by Carmen*

**physics**

A 1.3- block of ice is initially at a temperature of -3.5. If 6.6×105 of heat are added to the ice, what is the final temperature of the system? Find the amount of ice, if any, that remains. Suppose the amount of heat added to the ice block is doubled. By what factor must the ...
*Monday, November 22, 2010 at 5:20pm by katelyn*

**Physics**

heat to melt ice : mass*Hf = volume*density*Hf = 50m^2*.1m*920kg/m^3)(4.18KJ/kg = 19200kJ energy available: 200W/m^2*50m^2*8hrs*3600sec/hr = 28800kJ The truth is, that intense sunlight doesn't exist thru the day, as the sun rises and sets, it is much less, and the ice reflects...
*Tuesday, February 4, 2014 at 7:39am by bobpursley*

**Physics**

Two skaters, one with mass 68 kg and the other with mass 47 kg, stand on an ice rink holding a pole of length 8.8 m and negligible mass. Starting from the ends of the pole, the skaters pull themselves along the pole until they meet. How far does the 47 kg skater move? I ...
*Tuesday, November 1, 2011 at 5:29pm by Elaina*

**Physics**

In an ice show a 40.0 kg skater leaps into the air and is caught by an initially stationary 65.0 kg skater. (a) What is their final velocity assuming negligible friction and that the leaper's original horizontal velocity was 4.00 m/s? (b) How much kinetic energy is lost?
*Sunday, July 14, 2013 at 9:52pm by Amy*

**Physics**

How much heat must be removed from 500 grams of water at 0 degrees C to form ice at 0 degrees c?
*Monday, October 22, 2012 at 9:08pm by Anon*

**Chemistry**

q = mass ice x dHfusion. w = -p*delta V. Calculate volume ice at zero C. I would look up the density of ice at zero C and liquid H2O at 0C, then solve for volume for 18.015g ice and water. I found that here of (0.9167 g/cc for ice @ 0C vs 0.9998 @ 0Cg/cc for liquid water). ...
*Sunday, September 22, 2013 at 2:41pm by DrBob222*

**Math**

(a) 500*2^3 = 500*8 = 4000 (b) 500*2^0 = 500*1 = 500 (c) when 3x=1 or every 1/3 hour (d) 500*2^3x= 32000 2^3x = 32000/500 = 64 2^3x = 2^6 3x = 6 x = 2
*Thursday, February 13, 2014 at 5:51pm by Steve*

**chem**

.You have an ice cube that is 150 g and is at a temperature of 0°C. You drop the ice into water that is initially at 15ºC and the ice melts. As a result, the water cools of by exactly 1ºC to become 14ºC. How much water was there? In other words, what mass of water at 15ºC can ...
*Wednesday, September 12, 2012 at 9:34am by chuck*

**chem**

millimols HF = mL x M = 500 mL x 0.43M = 215 mmols F^- = 500 mL x 0.45M = 225 40 mL x 0.1M NaOH = 4 millimols. ...........HF + OH^- ==> F^- H2O initial...215....0......225...... add.............4.0............ change...-4.....-4........+4......... equil....211......0........
*Thursday, April 19, 2012 at 9:19pm by DrBob222*

**chem/phys**

mass body = 66.5 kg = 66,500 g. mass H2O = 66,500 x 0.62 = ? mols H2O = ?g/18 = ? Then remember 1 mol contains 6.02E23 molecules.
*Wednesday, April 25, 2012 at 5:30pm by DrBob222*

**math**

same question, but it didn't come across right. 500 equals 1 over X to the half 500 = 1/(X^1/2) Multiply both sides by X^1/2. 500*X^1/2 = (1*X^1/2)/X^1/2. X^1/2 divides out on the right side leaving 500*X^1/2 = 1. Now square both sides. [500*X^1/2]^2 = 1. 250*10^3*X = 1 Then ...
*Sunday, August 20, 2006 at 9:44pm by evelyn*

**physics**

If you drop a piece of ice on a hard surface, the energy of impact will melt some of the ice. The higher it drops, the more ice will melt upon impact.Find the height from which a block of ice should ideally be dropped to completely melt it that falls without air drag. [Hint: ...
*Tuesday, April 3, 2012 at 9:38pm by Jim*

**Real Estate Finance**

150,000 * 0.15 = 22,500 22,500 - 5,500 = $17,500
*Monday, November 26, 2012 at 2:20pm by Ms. Sue*

**Physics**

Is there a formula for heat of fusion equal 334kJ/kg for ice?
*Tuesday, June 30, 2009 at 3:31pm by Mary*

**Chemistry**

heat gained by ice from -30 to 0C + heat gained by melting ice + heat gained by water from ice @ 0 C moving to higher T + heat lost by H2O @ 90C = 0 [mass ice x specific heat ice x (Tfinal-Tinitial)] + [mass ice x delta Hfusion] + [mass melted ice x specific heat H2O x (Tfinal...
*Friday, February 24, 2012 at 12:47am by DrBob222*

**physics**

Two main factors contributed to observed sea level rise.[6] The first is thermal expansion: as ocean water warms, it expands.[7] The second is from the contribution of land-based ice due to increased melting. The major store of water on land is found in glaciers and ice sheets...
*Saturday, March 24, 2012 at 8:51pm by bobpursley*

**Chemistry**

"Find the total energy lost by the contents of a Styrofoam picnic cooler when a 3.60 kg block of ice placed inside the cooler completely melts (at 0 Celsius). The ice had an initial temperature of -10.00 Celsius." (Answer is 1.27*10^3 kJ). I was thinking of using q=mct, but I ...
*Friday, February 12, 2010 at 7:35pm by Stuck*

**Chemistry**

3) You pour 240 mL of Coke into a glass, where the T of the beverage is at 10.5 *C. You then add one ice cube of 45g. Determine the final temperature and the amount of ice remaining, if any. So I know that there won't be any more ice left because they will reach thermal ...
*Wednesday, May 9, 2012 at 3:06pm by Robert*

**advanced functions HELP!!!**

When you are in caclulus, you will have a much easier and elegant way of doing this. For now avgratechange=(rate8 - rate 15)/(8-15) rate 8=500(1/2)^8 and likewise for the rate15 approximate rate at t=2 (500*(.5)^(2+e)-500(.5)^2)/e 500*(.5)^2 (.5^e -1)/e now the limit of this ...
*Wednesday, December 10, 2008 at 8:55pm by bobpursley*

**Chemistry (Thermo)**

High quality coal (anthracite) is almost pure carbon. The combustion of carbon to carbon dioxide releases 393kJ per mol of carbon burnt. If 1kg of anthracite is burnt: a) How much heat is released? b) How much ice (in kg) at 273K could be melted to give water at 273K? c) How ...
*Friday, September 10, 2010 at 10:25am by Amy*

**MAA Global Science**

A lump of ice falls from a jet plane as it tries to land at an airport. If the ice hits the ground with a vertical speed of 85m/s, what was the height of the plane when the ice fell off.
*Friday, December 13, 2013 at 12:00am by Jacob*

**Science**

125 mL of water at 10 C is poured onto a 500 g block of ice at -35 C. Assuming it is a perfectly insulated container, what will be the final temperature of the mixture?
*Wednesday, February 10, 2010 at 6:03pm by James*

**Physics repost - need more explanation**

Posted by Ceres on Wednesday, September 23, 2009 at 4:07pm. The question is: "A block of ice at 0oC is dropped from a height that causes it to completely melt upon impact. Assume that there is no air resistance and that all the energy goes into melting the ice. Show that the ...
*Wednesday, September 23, 2009 at 9:28pm by Ceres*

**Science**

1 kg = 1000 grams 0.5 * 1 kg = 500 grams
*Monday, June 13, 2011 at 8:39pm by Ms. Sue*

**Physics**

A sled and rider, gliding over horizontal, frictionless ice at 4.9{\rm m/s} , have a combined mass of 86{\rm kg} . The sled then slides over a rough spot in the ice, slowing down to 2.1{\rm m/s} What impulse was delivered to the sled by the friction force from the rough spot?
*Tuesday, November 13, 2012 at 5:19pm by Cassie*

**math**

let the amount of rice at rs.60 be x kg let the amount of rice at rs.40 be y kg 60x + 40y = 10000 ---> 3x+2y = 500 50(x+y) = 11000 -----> x+y = 220 or y = 220-x sub back into the 1st 3x + 2(220-x) = 500 3x + 440 - 2x = 500 x = 60 , then y = 220 - 60 = 160 check: 60(60...
*Friday, August 10, 2012 at 5:14am by Reiny*

**physics**

An airplane has a mass of 34,500 kg and takes off under the influence of a constant net force of 45,000 N. What is the net force that acts on the plane's 80 kg pilot?
*Wednesday, January 25, 2012 at 11:29am by Anonymous*

**Physics**

Can someone please show me how to do this? A hockey player is standing on his skates on a frozen pond when an opposing player moving with a uniform speed of 12m/s skates by with the puck. After 3s, the first player makes up his mind to chase his oppponent. If he accelerates ...
*Saturday, August 27, 2005 at 4:54pm by Kim*

**math**

$4/500 g = $8/kg so .....
*Thursday, January 21, 2010 at 12:17am by Reiny*

**Chemistry**

How many 9.5 gram ice cubes will you have to put into 500 ml of water to cool the water from 22°C to 18°C?
*Monday, November 14, 2011 at 5:08pm by Walt*

**physics**

For the ice to reach 0 degrees, you will need Q = c• m• ΔT 0.04• 2090 • 71 = 5935,6 J The latent heat needed to melt the ice is 334 000 J / kg. So to melt the ice, you will need 334 000 • 0.040 = 13360 J Assume final temperature = x degC Specific heat of water is 4180 J...
*Wednesday, April 11, 2012 at 2:05am by Elena*

**Calculus **

Ice is forming in a pond at a rate given by dy/dx=ksqrt(t), where y is the thickness of the ice in cm at time t measured in hours since the ice started forming, and k is a positive constant. Find y as a function of t.
*Monday, December 5, 2011 at 9:12pm by math whizz *

**chemistry**

When ice at 0C melts to liquid water at 0C, it absorbs 0.334 kj of heat per gram. Suppose the heat needed to melt 31.5 g of ice is absorbed from the water contained in a glass. If this water has a mass of .210 kg and a temperature of 21.0C, what is the final temperature of the...
*Wednesday, June 24, 2009 at 1:45pm by Capacino*

**Physics**

Because ice can absorb more heat from the soft drink to change its state from ice to water (latent heat), than water only. If you use the equation for heat released/absorbed, Let T2 = final temperature of ice (assume it's above 0°C, so it became water at some temp > 0°C) ...
*Sunday, December 1, 2013 at 7:51pm by Jai*

**pharmacy calculations**

500 ml of a 1:5 solution contains 500*(1/5)=100 ml. of the concentrate. So if x is the volume of 1:4, then 500-x is the volume of 1:10. Hence x(1/4)+(500-x)(1/10)=500*(1/5) Solve for x to get x=333.33 ml.
*Friday, August 3, 2012 at 1:08pm by MathMate*

**Physics/Force**

building a device to shoote a plastic hockey puck with a lever (think pinball) attached to a bungie cord. How much force is needed to propel a plasic hockey puck 30 feet or 40 feet or 50 feet - what formula should I use? Can I calculate the force by how much the bungie cord ...
*Thursday, October 28, 2010 at 6:18pm by Eileen*

**physics**

A puck of mass 80.0 g and radius 4.10 cm slides along an air table at a speed of 1.50 m/s as shown in the figure below. It makes a glancing collision with a second puck of radius 6.00 cm and mass 130.0 g (initially at rest) such that their rims just touch. Because their rims ...
*Sunday, December 4, 2011 at 6:04pm by Anonymous*

**physics**

A puck of mass 80.0 g and radius 4.10 cm slides along an air table at a speed of 1.50 m/s as shown in the figure below. It makes a glancing collision with a second puck of radius 6.00 cm and mass 130.0 g (initially at rest) such that their rims just touch. Because their rims ...
*Sunday, December 4, 2011 at 6:04pm by Anonymous*

**physics**

A puck of mass 80.0 g and radius 4.10 cm slides along an air table at a speed of 1.50 m/s as shown in the figure below. It makes a glancing collision with a second puck of radius 6.00 cm and mass 130.0 g (initially at rest) such that their rims just touch. Because their rims ...
*Sunday, December 4, 2011 at 6:09pm by Anonymous*

**Physics**

Multiply the heat of fusion (80 kcal/kg) by the mass of ice.
*Sunday, December 11, 2011 at 8:07pm by drwls*

**physics**

A helicopter flies over the arctic ice pack at a constant altitude, towing an airborne 195-kg laser sensor which measures the thickness of the ice (see the drawing). The helicopter and the sensor move only in the horizontal direction and have a horizontal acceleration of ...
*Sunday, November 25, 2012 at 9:16pm by John*

**physics**

A helicopter flies over the arctic ice pack at a constant altitude, towing an airborne 112-kg laser sensor which measures the thickness of the ice (see the drawing). The helicopter and the sensor move only in the horizontal direction and have a horizontal acceleration of ...
*Thursday, July 25, 2013 at 7:02pm by ODU*

**Algebra**

An ice cream shop has 6 flavors of ice cream and 3 toppings. In how many ways can you order a sundae with 1 flavor of ice cream and one topping?
*Thursday, September 8, 2011 at 1:42pm by Ariel*

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