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A 210 g piece of ice at 0°C is placed in 410 g of water at 22°C. The system is in a container of negligible heat capacity and is insulated from its surroundings. (a) What is the final equilibrium temperature of the system? (b) How much of the ice melts?
A standard baseball has a circumference of approximately 23 cm. If a baseball had the same mass per unit volume as a neutron or a proton, about what would its mass be?
A brick is thrown upward from the top of a building at an angle of 45° to the horizontal and with an initial speed of 10 m/s. If the brick is in flight for 2.8 s, how tall is the building.
Two mirrors meet at a 133° angle. If light rays strike one mirror at 40°, at what angle ? do they leave the second mirror?what is the value of h.
A swimming pool has dimensions 32 m 11 m and a flat bottom. When the pool is filled to a depth of 2.10m with fresh water, what is the force caused by the water on the end that is 11m.
A ball is thrown nearly vertically upward from a point near the edge of a tall building. it misses the edge of the building in ts way down and passes a point 160ft below its starting point 5 seconds after it leaves the thrower's hand.
The electric potential difference between two infinite, parallel metal plates is V. If the plates are separated by a distance L = 4.50 mm and the electric field between plates is E = 270 V/m, what is V.
At rest, the car's horn sounds at a frequency of 455 Hz. The horn is sounded while the car is moving down the street. A bicyclist moving in the same direction with one-third the car's speed hears a frequency of 427 Hz. What is speed of the car.
A horizontal force of 822 N is needed to drag a crate across a horizontal floor with the constant speed. You drag the crate using a rope held at an angle of 34° (from the horizontal).
A farmer planted a field of Bt 123 corn and wants to estimate the yield in terms of bushels per acre. He counts 22 ears in 1/1000 of an acre. He determines that each ear has about 700 kernels on average. He also knows that the bushel contains abou..
A 3 meter long 200kg steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction.
A student decides to move the box of books into her dormitory room by pulling on a rope attached to the box. She pulls with a force of 168 N at an angle of 30.0° above the horizontal. The box has a mass of 21.0 kg, and the coefficient of kinetic f..
Copper wire has a breaking stress of about 3×10^8 N/m2. What is the highest load that can be hung from a copper wire of diameter 0.420 mm.
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