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A165-g wooden cup at 15.2 degree Celcius is filled with 325ml of brewed coffee (essentially water) at 100 decrees Celcius. What will be the common final temperature of the cup and the coffee when thermal equilibrium is reached, if no heat is lost to the environment? (Specific heat of wood = 1700 J/(kg.degrees Celcius).
The fastest measured pitched baseball left the pitcher's hand at a speed of 42.0m/s. what acceleration did he give the ball
Two balls undergo a perfectly elastic head-on collision, with one ball initially at rest. If incoming ball has a speed of 200 m/s. What is the final speed of the incoming ball if it is much more massive than stationary ball.
A slinky has a mass of 0.28 kg and negligible length. When it is stretched 1.2 m, it is found that transverse waves travel the length of the slinky in 0.68 s. What is the force constant, k, of the slinky
An open-pit coal mine consumes 96 hectares of land, down to the depth of 26 m, each year. What volume of earth, in cubic kilometres, is removed in this time.
When a certain air-?lled parallel-plate capacitor is connected across a battery, it acqquires a charge (on each plate) of magnitude 131 µC. What is the dielectric constant of the slab
find the tension in the wire.Find the maximum height above the ground reached by the package.
Suppose the Eskimo is pushing the same 50.0-kg sled across level terrain with a force of 50 N. If he does 4 x 10^2J of work on the sled while exerting the force horizontally, through what distance must he have pushed it.
a world class sprinter can burst out of the blocks to essentially top speed of about 11.5m/s in the first 15.0m of the race. What is the average acceleration of the sprinter
A bullet with mass m and speed v is fired at a ballistic pendulum bob of mass M. The bob is attached to a thin, light rod of length L, hangs vertically initially, and is attached to a pivot at its top end.
Ultraviolet light of wavelength 280 nm is used in an experiment on photoelectric effect with lithium (c = 2.5 eV) cathode. Find the maximum kinetic energy of the photoelectrons and (b) the stopping potential.
A 685 kg car stopped at an intersection is rear-ended by a 1470 kg truck moving with a speed of 12.5 m/s. find the final speed of both vehicles after the collision
A 35 ? lamp and a 90 ? lamp are connected in series and placed across a potential of 40 V. What is the voltage drop across the first lamp
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