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An aluminum ice tray is filled with 200 gram of water. The mass of the tray is 340 gram, and both ice and tray are at 18oC. Find how much heat must be removed from this system to convert the water to ice cubes at -15oC?
a glass lens has a scratch-resistant plastic coating on it. the speed of light in the glass is 0.670c and the speed of
A block slides down an inclined plane, starting from rest and being pushed with a constant acceleration of 4.95 m/s2 over a distance of 18.2 cm. Find the total time the block is in motion
A car weighing 1.1×104 N and traveling at 12.90 m/s attempts to round an unbanked curve with a radius of 54 m. What force of friction is required to keep the car
Mechanics: Center of Mass. A 60 kg woman and a 90 kg man stand 10.0 m apart on frictionless ice.
A projectile is fired in such a way that its horizontal range is equal to 12 times its maximum height. What is the angle of projection
A jet airplane in level flight has a mass of8.62104kg, and the two wings have an estimated total area of89.0m2. If the speed of air under the wings is232m/s, what is the speed of the air over the wings
in 9.5 s a fisherman winds 2.1 m of fishing line onto a reel whose radius is 3.0 cm assumed to be constant as an
A hiker, who weighs 900 N, is strolling through the woods and crosses a small horizontal bridge. What is the magnitude of the force
electric charge is uniformly distributed inside a nonconducting sphere of radius 0.30 m. the electric field at a point
A light plane attains an airspeed of 480 km/h. The pilot sets out for a destination 830 km due north but discovers that the plane must be headed 24.0° east of due north to fly there directly
two speakers 10m apart and facing each other emit identical in phase sound waves. if you stand between the speakers 2m
What would be the potential difference VC - VB across the thin resistor if the battery emf is 4.00 volts? Suppose that the electric field in the thick wires is very small (so that the potential differences along the thick wires are negligible)
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