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Q1. A 560 g block of ice is cooled to -78 °C and is then added to 165 g of water in an 80-g copper calorimeter at a temperature of 25 °C. Determine the final temperature of the system consisting of the ice, water, and calorimeter.
Q2. Hakeem throws an 8.50 g ball straight down from a height of 2.0 m. The ball strikes the floor at the speed of 7.5 m/s. What was the initial speed of the ball? Suppose that air resistance is negligible.
A 77 person stands on the uniform ladder 4.0 long, that weighs 100. The floor is rough; hence, it exerts both a normal force, and a frictional force, on the ladder. The wall, on the other hand, is frictionless; it exerts only the normal force.
Find out the angular velocity at the beginning of the 4.60 interval; the angular acceleration of the flywheel.
What magnetic field strength produced by Helmholtz coils
A 1.20 liter flask contains a certain quantity of ideal gas at 305 K. next an equal number of molecules of the same gas are added to the flask, after which the absolute pressure is 1.30 times its original value. What is the final temperature.
What is rms speed of the atoms at temperature
The primary coil of a transformer has 237 turns; secondary coil has 2100 turns. An alternating current is sent through the primary coil. The emf in the primary is 25 V. What is the emf amplitude in secondary.
Compute the horizontal distance the ball
Two wires are identical, except that one is aluminium and one is gold. The aluminium wire has a resistance of 0.18. What is resistance of the gold wire.
What is magnitude of the net force on the student
What frequency will hear after the train passes
Determine an angle (in radians) through which the drill rotates during this period.
An elastic cord is 69 cm long when a weight of 57 N hangs from it but is 70 cm long when the weight of 75 N hangs from it. What is the "spring" constant k of this elastic cord.
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