Wednesday
November 26, 2014

Homework Help: Science: Physics

Recent Homework Questions About Physics

Post a New Question | Current Questions

Chemistry Physics
How many joules of heat need to be removed to condense 1.50 kg of steam at 100°C -Specific Heat for steam is 2000 J/kg°C-
Friday, November 7, 2014 at 7:41pm

Physics Math
How many joules of heat need to be removed to condense 1.50 kg of steam at 100°C -Specific Heat for steam is 2000 J/kg°C-
Friday, November 7, 2014 at 7:32pm

Physics Science
How many kilocalories of heat are required to melt 20.0 kg of ice at 0°C? Okay so the given is m=20.0kg Ti=0°C HeatFusionIce=80 kcal/kg
Friday, November 7, 2014 at 7:15pm

physics
Two cars leave the same point at the same time, each travelling at the same constant speed of 89.0 km/h and each having the same mass. However, the first car drives directly east, while the second car heads directly south. At what speed (the magnitude of the velocity) is the ...
Friday, November 7, 2014 at 6:40pm

Physics
A pendulum consists of a 2.1 kg stone swinging on a 3.6 m string of negligible mass. The stone has a speed of 7.9 m/s when it passes its lowest point. (a) What is the speed when the string is at 60° to the vertical? (b) What is the greatest angle with the vertical that the...
Friday, November 7, 2014 at 6:23pm

Physics
A plane is flying horizontally with speed 251 m/s at a height 2180 m above the ground, a package is thrown downward from the plane with a vertical speed v1 = 80 m/s. What is the magnitude of the total velocity of the package at the moment it is thrown as seen by an observer on...
Friday, November 7, 2014 at 5:07pm

Physics
A target lies flat on the ground 4 m from the side of a building that is 10 m tall, as shown below. The acceleration of gravity is 10 m/s2 . Air resistance is negligible. A student rolls a 4 kg ball off the horizontal roof of the building in the direction of the target. The ...
Friday, November 7, 2014 at 4:48pm

physics
A cannon fires a 0.598 kg shell with initial velocity 10 m/s in the direction 46◦ above the horizontal. The shell’s trajectory curves downward be- cause of gravity, so at the time t = 0.53 s the shell is below the straight line by some verti- cal distance ∆h. ...
Friday, November 7, 2014 at 4:46pm

physics
A tank contains 12.2 g of chlorine gas (Cl2) at a temperature of 84 °C and an absolute pressure of 5.60 × 105 Pa. The mass per mole of Cl2 is 70.9 g/mol. (a) Determine the volume of the tank. (b) Later, the temperature of the tank has dropped to 26 °C and, due to...
Friday, November 7, 2014 at 4:25pm

physics
Find the displacement of the car after 5.9 s. Answer in units of m
Friday, November 7, 2014 at 3:21pm

physics
A steel ball of mass m=5 g is moving at a speed of 250 m/s toward a large mass M=2.2 kg which is connected to a relaxed spring, as shown below. When the ball reaches the large mass it collides and bounces off without losing any kinetic energy. The large mass is connected to a ...
Friday, November 7, 2014 at 2:08pm

physics
Static friction is smaller than kinetic friction because it is harder to keep an object than moving than to put it in motion.
Friday, November 7, 2014 at 1:33pm

physics
A remote-controlled toy car of mass 2.2 kg starts from rest at the origin at t = 0 and moves in the positive direction of an x axis. The net force on the car as a function of time is given by the figure. (a) What is the time rate of change of the momentum of the car at t = 3.0...
Friday, November 7, 2014 at 12:53pm

physics
A box is put on a scale that is marked in units of mass and adjusted to read zero when the box is empty. A stream of marbles is then poured into the box from a height h = 6.93 m above its bottom at a rate of R = 128 (marbles per second). Each marble has mass m = 7.14 g. If the...
Friday, November 7, 2014 at 12:50pm

Physics
If rocket had been 10 m above the ground when its horizontal distance from the launchpad was 2m ,wheredo you think rocket would have landed
Friday, November 7, 2014 at 10:33am

Physics
Power supplied to a particle of mass 2 Kg varies with time as p = 3t^2/2 watt. Here t is in seconds. If initial velocity = 0, find the velocity after 2s. Sorry for not proving my work. Frankly speaking I'm unable to solve any power questions. Any help would be appreciated. :)
Friday, November 7, 2014 at 10:23am

Physics
block slides across table with initial speed of 8 m/s coefficient of friction between block and table is .5 and table is 4 m long and 1.2 m high determine how far the block lands from the base of the table
Friday, November 7, 2014 at 9:09am

Physics
block of mass 3.5 kg slides down frictionless incline that is 10 m long and inclined at angle of 37 when reaches bottom of incline it collides perfectly inelastically with another block of mass 2 kg then slides along a level floor if coefficient of friction between the block ...
Friday, November 7, 2014 at 8:50am

Physics
A cannon is fired from the ground at an angle of 30 degrees. It is being shot an an initial velocity of 200m/s. What is the maximum height of the cannon ball? How fat will the cannon ball travel before it hits the ground
Friday, November 7, 2014 at 8:43am

physics
A coolant fluid has a latent heat of evaporation of 234 kj/kg . If the pump rate is 2250g per minute. How much thermal heat is removed each hour?
Friday, November 7, 2014 at 6:03am

Physics
a (n) 1510 kg car is moving along a level road at 13.8 m/s. The driver accelerates and in the next 10s the engine provides 23400 J of additional energy. If 3900 J of this energy must be used to overcome friction, what is the final speed of the car?
Friday, November 7, 2014 at 1:17am

Physics
An object is formed by attaching a uniform, thin rod with a mass of mr = 6.54 kg and length L = 5.12 m to a uniform sphere with mass ms = 32.7 kg and radius R = 1.28 m. Note ms = 5mr and L = 4R. 1)What is the moment of inertia of the object about an axis at the left end of the...
Friday, November 7, 2014 at 1:05am

physics
the formula of centripital accelaration is v>2/r Q:Why here is square of speed ?
Friday, November 7, 2014 at 12:26am

physics
find displacement 4 vectors (1) 40 meters @10, (2) 30 meters @ 190 and (1)50 meters @ 280
Thursday, November 6, 2014 at 11:38pm

Physics
What is the apparent weight of a 70-kg astronaut 3800 km from the center of the earth's moon in a space vehicle moving at constant velocity and acceleration toward the moon at 2.9m/s^2? State the direction in each case.
Thursday, November 6, 2014 at 11:30pm

physics
How high must your roof be to fire 1.2km if it fires at 450 m/s muzzle velocity?
Thursday, November 6, 2014 at 11:29pm

physics
A cannon rests on the ground at 40 degree angle it fires a ball at 200 m/s how high is the top of trajectory? At what impact speed does it rest? How far away does it land?
Thursday, November 6, 2014 at 11:16pm

physics
A jet needs to reach a takeoff speed of 75.0 m/s. If the runway is 1625 meters long, what minimum acceleration is needed? How much time will it take to reach the takeoff speed
Thursday, November 6, 2014 at 10:37pm

physics
A 0.027 kg golf ball moving at 16.8 m/s crashes through the window of a house in 4.6 × 10−4 s. After the crash, the ball contin- ues in the same direction with a speed of 12.0 m/s. Assuming the force exerted on the ball by the window was constant, what was the mag...
Thursday, November 6, 2014 at 10:34pm

physics
A spherical mirror is polished on both sides. When the concave side is used as a mirror, the magnification is +1.2. What is the magnification when the convex side is used as a mirror, the object remaining the same distance from the mirror?
Thursday, November 6, 2014 at 10:19pm

physics
the mass of the sled as its two riders is 350kg he magnitude of the centripetal force that acts on the on the sled if the radius is 33m or 24m
Thursday, November 6, 2014 at 10:12pm

Physics
A spherical bowling ball with mass m = 3.2 kg and radius R = 0.107 m is thrown down the lane with an initial speed of v = 8.6 m/s. The coefficient of kinetic friction between the sliding ball and the ground is μ = 0.34. Once the ball begins to roll without slipping it ...
Thursday, November 6, 2014 at 10:01pm

Physics
You are holding the axle of a bicycle wheel with radius 35 cm and mass 1 kg. You get the wheel spinning at a rate of 55 rpm and then stop it by pressing the tire against the pavement. You notice that it takes 2.0 s for the wheel to come to a complete stop. What is the angular ...
Thursday, November 6, 2014 at 9:52pm

physics
A solid sphere of uniform density starts from rest and rolls without slipping down an inclined plane with angle θ = 30o. The sphere has mass M = 8 kg and radius R = 0.19 m . The coefficient of static friction between the sphere and the plane is μ = 0.64. What is the ...
Thursday, November 6, 2014 at 9:52pm

physics
A 244 g particle is released from rest at point A inside a smooth hemispherical bowl of ra- dius 21.7 cm, as shown in the figure The acceleration of gravity if 9.81 m/s2 .
Thursday, November 6, 2014 at 9:12pm

Physics
Three uniform spheres are located at the corners of an equilateral triangle. Each side of the triangle has a length of 2.40 m. Two of the spheres have a mass of 3.40 kg each. The third sphere (mass unknown) is released from rest. Considering only the gravitational forces that ...
Thursday, November 6, 2014 at 9:02pm

physics
A quarterback throws the football to a stationary receiver who is 22.7m down the field. the football is thrown at an initial angle of 39 degrees to the ground. The acceleration of gravity is 9.81m/s^2. a) at what initial speed must the quarterback throw the ball for it to ...
Thursday, November 6, 2014 at 8:53pm

physics
The coldest and hottest temperatures ever recorded in the United States are -83°F and 135°F, respectively. What is the speed of sound in air at each temperature?
Thursday, November 6, 2014 at 8:50pm

Physics Help Please! Check the answer
an athlete stretches a spring an extra 40.0 cm. how much energy has he transferred to the spring, if the spring constant is 5286.0 N/m? Us= 1/2kx^2 =1/2(5286.0)(.40)=1057.2 J Thanks!
Thursday, November 6, 2014 at 8:45pm

physics
A hiker begins a trip by first walking 25.0 km southeast from her base camp. On the 2nd day, she walks 40.0 km in a direction 600 north of east, at which point she discovers a forest rangers tower. Find the magnitude and direction of displacement from base camp.
Thursday, November 6, 2014 at 8:42pm

physics
For the ballistic missile aimed to achieve the maximum range of 15500 km, what is the maximum altitude reached in the trajectory? Answer in units of km
Thursday, November 6, 2014 at 8:30pm

Physics
Your friend Josh tells you that he spends less on gas in the winter than in the summer. He also says that he has to fill up his tank less often in the winter. (a) Which of the following are possible hypotheses that can be formed from Josh’s observations? (You can choose ...
Thursday, November 6, 2014 at 8:21pm

physics
An artillery shell is fired at an angle of 86◦ above the horizontal ground with an initial speed of 1630 m/s. The acceleration of gravity is 9.8 m/s 2 . Find the total time of flight of the shell, neglecting air resistance. Answer in units of min
Thursday, November 6, 2014 at 8:13pm

physics
An 11.8 g bullet leaves the muzzle of a rifle with a speed of 578.5 m/s. What constant force is exerted on the bullet while it is traveling down the 0.6 m length of the barrel of the rifle? Answer in units of N
Thursday, November 6, 2014 at 8:13pm

physics
A pelican flying along a horizontal path drops a fish from a height of 3.3 m. The fish travels 7.6 m horizontally before it hits the water below. What was the pelican’s initial speed? The acceleration of gravity is 9.81 m/s 2 . Answer in units of m/s
Thursday, November 6, 2014 at 8:02pm

physics
A constriction in a pipe reduces its diameter from 7.9 cm to 1.8 cm . Where the pipe is wider, the fluid velocity is 8 m/s. Find the fluid velocity where the pipe is narrow. Answer in units of m/s
Thursday, November 6, 2014 at 7:25pm

physics
A circular swimming pool has a flat bottom and a 4.39 m diameter. It is filled with water to a depth of 1.51 m. There is 1.36 atm of pressure on the top surface.
Thursday, November 6, 2014 at 7:17pm

physics
What force F must be applied to the small piston to maintain the load of 49 kN at a constant elevation?
Thursday, November 6, 2014 at 7:09pm

physics
If the average gauge pressure in the vein is 14400 Pa, what must be the minimum height of the bag in order to infuse glucose into the vein? Assume that the specific gravity of the solution is 1.05. The acceleration of gravity is 9.8 m/s
Thursday, November 6, 2014 at 6:57pm

physics
A 1.2 lead ball is launched off a cliff top at 16 m/s Determine the balls kinetic energy at position P. Ignore friction
Thursday, November 6, 2014 at 6:50pm

physics
A 73 kg man in a 4.3 kg chair tilts back so that all his weight is balanced on two legs of the chair. Assume that each leg makes contact with the floor over a circular area of radius 1.5 cm. Find the pressure exerted on the floor by each leg. The acceleration of gravity is 9.8...
Thursday, November 6, 2014 at 6:35pm

physics
A 15 kg rock is horizontally from very high cliff at a speed of 65m/s. what is the speed of the rock after it has fallen a vertical distance of 35m?
Thursday, November 6, 2014 at 6:10pm

Physics
A. You drag a suitcase of mass 19 kg with a force of F at an angle 41.3 degrees with respect to the horizontal along a surface with kinetic coefficient of friction 0.54. The acceleration due to gravity is 9.8 m/s^2. What is the normal force on the suitcase? Answer in units of ...
Thursday, November 6, 2014 at 4:08pm

physics
The half-life of Th(227) is 18.72 days. It decays by alfa emission to Ra(223), an alfa emitter whose half-life is 11.43 days. A particular sample contains 10^6 [10E(+6)] atoms of Th(227) and no Ra(223) at time t=0. a) How many atoms of each type will be in the sample at t=15 ...
Thursday, November 6, 2014 at 3:51pm

Physics
41. A student pulls horizontally on a 12 kg box, which then moves horizontally with an acceleration of 0.2 m/s^2. If the student uses a force of 15 N, what is the coefficient of kinetic friction of the floor? Okay, so I know that the net force is 15 and the box weighs 12 kg. I...
Thursday, November 6, 2014 at 3:25pm

Hurricane Project for Physics Class
1) Please describe the typical path(s) for hurricanes. Is this part of the pattern of convection?
Thursday, November 6, 2014 at 3:07pm

Physics
An Escort and a Camaro traveling at right angles collide and stick together. The Escort has a mass of 1200 kg and a speed of 25 km/h in the positive x direction before the collision. The Camaro has a mass of 1700 kg and was traveling in the positive y direction. After the ...
Thursday, November 6, 2014 at 2:21pm

physics
a 0.12 kg is sitting on a record with a diameter of 0.30 meters. the record completes one turn on 0.40 seconds
Thursday, November 6, 2014 at 1:51pm

physics
a 0.12 kg is sitting on a record with a diameter of 0.30 meters. the record completes one turn on 0.40 seconds
Thursday, November 6, 2014 at 1:50pm

physics
What is the maximum speed that the car can turn in a curve of radius 29.0 m without slipping? The coefficient of static friction between a road and a car's tires is 0.500, and the coefficient of kinetic friction is 0.390. Assume that the road is horizontal and flat.
Thursday, November 6, 2014 at 1:44pm

Physics
I have a blue liquid with density 1040 +- 20 yellow liquid 1190 +- 60, (dark)red liquid 1170 +- 30 pink/light red liquid 1100 +- 60 my task is to find out what liquids are they all of the densities were calculated in class(we were doing an experiment).
Thursday, November 6, 2014 at 1:35pm

Physics
A ball of mass 0.60 kg is fired with velocity 100 m/s into the barrel of a spring gun of mass 2.4 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 ...
Thursday, November 6, 2014 at 1:32pm

physics (work/nonconservative forces)
An object moving along a horizontal track collides with and compresses a light spring (which obeys Hooke's Law) located at the end of the track. The spring constant is 47.3 N/m, the mass of the object 0.230 kg and the speed of the object is 1.80 m/s immediately before the ...
Thursday, November 6, 2014 at 1:19pm

physics
How many joules of heat are required to melt 20.0 kg of ice at 0°C?
Thursday, November 6, 2014 at 1:11pm

physics
if a load 1kg streches a cordby 1.2cm.what is the force constantof the cord?
Thursday, November 6, 2014 at 1:04pm

Physics
Three particles A, B, C start from the origin from the same time, A with velocity a along x-axis, B with velocity b along y-axis, C with velocity c in xy plane along a line x=y. What should be the magnitude of c so that they always remain collinear is (a). (a+b)/2 (b). √...
Thursday, November 6, 2014 at 12:50pm

Physics
Can someone, please help me out with this question. A uniform rectangular 91.21 kg refrigerator with height h = 2.069 m and width w = 1.153 m is pushed at a constant velocity across a level floor. The refrigerator is pushed in the horizontal direction halfway between the floor...
Thursday, November 6, 2014 at 12:00pm

physics
A car drives straight down toward the bottom of a valley and up the other side on a road whose bottom has a radius of curvature of 125mm . At the very bottom, the normal force on the driver is twice his weight.
Thursday, November 6, 2014 at 11:58am

physics
Daneil is bouncing on a trampoline. After a certain bounce he leaves the ground traveling at a speed of 2.54 m/s. How far into the air does he go? I need helllpppp I'm so bad a physics, I need to know what formula to use..
Thursday, November 6, 2014 at 11:16am

Physics
Explain how you would determine how much error there is between a vector addition and the real results.
Thursday, November 6, 2014 at 9:16am

Physics
1) What are the possible effects of a warming climate and rising sea levels on the number, intensity, and effects of hurricanes?
Thursday, November 6, 2014 at 7:23am

Physics
1) Please describe the structure of a hurricane,and how they work. Include a discussion of how energy is transferred from the warm ocean water up to the sky.
Thursday, November 6, 2014 at 7:17am

physics
A motorist has to travel 3.50 km in a city with an average speed not exceeding to 25 km/h . If the average speed increases to 40 km/h. What is time he will gain from his journey
Thursday, November 6, 2014 at 7:10am

physics
A motorist has to travel 3.50 km in a city with an average speed not exceeding 25 km/h. If the average speed increases to 40 km/h, fine the time he will gain in his journey
Thursday, November 6, 2014 at 7:05am

Physics
1) Please describe the typical path(s) for hurricanes. Is this part of the pattern of convection?
Thursday, November 6, 2014 at 6:59am

physics
A motorist has to travel 3.50 km in a city with an average speed not exceeding 25 km/h. If the average speed increases to 40 km/h, find the time he will gain in his journey.
Thursday, November 6, 2014 at 6:30am

College physics
In this problem you will estimate the heat lost by a typical house, assuming that the temperature inside is T(in) = 20 degrees celcius and the temperature outside is T(out) = 0 degrees celcius. The walls have fiberglass insulation, which dominates the heat conduction ...
Thursday, November 6, 2014 at 3:40am

physics
48 kg projectile is fired at an angle of 30 degree above the horizontal with an initial speed of 1.34 x10^2m/s fro the top of a cliff 150m above level ground, where the ground is taken to be y=0 what is the inital total mechanical energy of the projectile?'
Thursday, November 6, 2014 at 1:55am

physics
'a 48 kg projectile is fired at an angle of 30 degree above the horizontal with an initial speed of 1.34 x10^2m/s fro the top of a cliff 150m above level ground, where the ground is taken to be y=0 what is the inital total mechanical energy of the projectile?'
Thursday, November 6, 2014 at 1:54am

physics
A watermelon falls off of a balcony 14 meters high. How fast is it moving immediately before it reaches the ground? a increases with time b is 0 m/s c remains constant d decreases with time
Wednesday, November 5, 2014 at 11:58pm

Physics
A rubber ball with a mass of 0.130 kg is dropped from rest. From what height was the ball dropped, if the magnitude of the ball's momentum is 0.710 kg · m/s just before it lands on the ground?
Wednesday, November 5, 2014 at 11:52pm

physics
A cat slides off the table. Immediately before the cat leaves the table,what is the vertical velocity?
Wednesday, November 5, 2014 at 11:33pm

Science, Physics
A 800kg safe is 2.3m above a heavy-duty spring when the rope holding the safe breaks. The safe hits the spring and compresses it 52cm.What is the spring constant of the spring?
Wednesday, November 5, 2014 at 11:08pm

Chemistry Physics
A steel pipe 8.25 m long is installed at 45°C. Find the decrease in length when coolants at -60°C pass through the pipe
Wednesday, November 5, 2014 at 10:37pm

physics
A ball is shot out of a spring and into a hollow ballast which then swings upwards 2.5 cm. The ball has a mass of 0.10 kg, the ballast has a mass of 0.50 kg and the spring constant is 500 N/m. How fast was the ballast-ball system moving immediately after impact? How fast was ...
Wednesday, November 5, 2014 at 10:19pm

physics
A 1000 kilogram car rolling on a horizontal surface has speed v= 45 kilometer per hour when it strikes a horizontal coil spring and is brought to rest in a distance of 2.2 meters. What is the spring stiffness constant of the spring?
Wednesday, November 5, 2014 at 9:31pm

Physics
A block of mass 0.45 kg can slide over a frictionless horizontal surface. It is attached to a spring whose stiffness constant is k = 18 N/m. The block is pulled 38 cm and let go. a)What is its maximum speed? b)What is its speed when the extension is 30 cm? c)At what position ...
Wednesday, November 5, 2014 at 9:24pm

Physics
a point 22 caliber rifle fires a 1.8 gram bullet at a 400m/s into a block of wood. If the bullet penetrates to a depht of 10cm find the desaceleration of the bullet. The force exerheted on the bullet, and the time.
Wednesday, November 5, 2014 at 9:21pm

Physics Science
How many grams of water at 20°C are necessary to change 800g of water at 90°C to 50°C? so its setup like (20*1.00)*(90-50)+(20*1.00)*(90-50) = 1600g?
Wednesday, November 5, 2014 at 9:16pm

Physics Help Please!
A block of mass is moving along the horizontal frictionless surface with a speed of 5.70 m/s. If the slope is 11.0° and the coefficient of kinetic friction between the block and the incline is 0.260, how far does the block travel up the incline? Show step by step please! ...
Wednesday, November 5, 2014 at 8:04pm

Physics
An object of mass 1.00 kg is attached to a vertical spring with spring constant 100 N/m. The object is held at rest in a position such that the spring is stretched upward a distance 1.00 cm beyond its undisturbed length. If the object is released, how far will it drop before ...
Wednesday, November 5, 2014 at 7:35pm

physics
how do I solve for angular momentum if the weight its 700 g and the angular v is (1m=r, 120rmp). I get 12.56 for the v. But i don't know how to solve for the monentum. Also is my v correct?
Wednesday, November 5, 2014 at 7:22pm

Physics
A mass of 2.0kg traveling at 3.0 m/s along a horizontal plane hits a relaxed spring 20cm away from it. The coefficient of kinetic friction is 0.3. The mass is slowed to zero velocity when the spring has been compressed. By how much the spring has been compressed, the spring ...
Wednesday, November 5, 2014 at 7:21pm

Physics
A large flatbed truck hauls a heavy wood crate as shown. The crate is not tied down and simply rests on the metal bed of the truck. Find the maximum acceleration the truck can have if the crate is not to slide along the truck bed. (Static friction is 0.5 and kinetic friction ...
Wednesday, November 5, 2014 at 7:21pm

Physics
A girl coasts down a hill on a sled, reaching a level surface at the bottom with a speed of 6.7 m/s. The coefficient of kinetic friction between runners and snow is 0.038, and the girl and sled together weigh 603 N. The acceleration of gravity is 9.8 m/s2 . How far does the ...
Wednesday, November 5, 2014 at 7:14pm

Physics
A simple pendulum of length 2.00m is made with a mass of 2.00kg. The mass has speed of 3.00 m/s when the pendulum is 30 degrees above its lowest position. -What is the maximum angle away from the lowest position the pendulum will reach? -What is the speed of the mass when the ...
Wednesday, November 5, 2014 at 7:12pm

physics
Two blocks connected by a string are pulled across a rough horizontal surface by a force applied to one of the blocks, as shown. The acceleration of gravity is 9.8 m/s Block 1 has a mass of 5 kg while block two has a mass of 8 kg. A string is tied to the 8 kg block pulling up ...
Wednesday, November 5, 2014 at 6:59pm

physics
A man skis down from the top of a hill 1500.0 m high, starting from rest. If he loses 50% of his initial mechanical energy to friction during his descent, what is his speed in m/s at the base of the hill?
Wednesday, November 5, 2014 at 6:35pm

physics
A 74.0 kg ice skater moving to the right with a velocity of 2.14 m/s throws a 0.12 kg snowball to the right with a velocity of 24.2 m/s relative to the ground. (a) What is the velocity of the ice skater after throwing the snowball? Disregard the friction between the skates and...
Wednesday, November 5, 2014 at 6:25pm

Chemistry Physics
How many grams of water at 20°C are necessary to change 800g of water at 90°C to 50°C?
Wednesday, November 5, 2014 at 6:10pm

Pages: <<Prev | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>

Post a New Question | Current Questions

Homework Help: Science

Search
Members