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An aluminium cup contains 225 g of water and a 40 g copper stirrer, all at 27°C. A 430 g sample of silver at an initial temperature of 87°C is placed in the water. The stirrer is utilized to stir the mixture gently until it reaches its final equilibrium temperature of 32°C. Compute the mass of the aluminium cup.
A mass m1 = 5.3 kg rests on a frictionless table and connected by a massless string to another mass m2 = 5.3 kg. What is the final speed of the two blocks
Ted is traveling on his railroad car (length 30 m) at speed v = 0.6 c as shown in the figure. As measured on Alice's clock, how long does it take for Ted's railroad car to pass Alice
A 1.60 kg ball and a 7.20 kg ball are connected by an 80.0 cm long massless, rigid rod. What is the rotational kinetic energy of the structure
The magnetic force on a straight 0.31 m segment of wire carrying a current of 4.5 A is 1.5 N. What is the magnitude of the component of the magnetic field that is perpendicular to the wire? Answer in units of T.
A rescue helicopter lifts a 79 kilogram person straight up by means of cable. Use the work-energy theorem and calculate the final speed of the man
A 22-L sample of air at 298K contains 0.10 grams of water vapor. What is the relative humidity of the air
Imagine a truck with a mass of 30 metric tons (t) (1 t=1,000 kg) barrelling down a highway at a speed of 50 mi/h. What is the truck's momentum in kilograms
Sarge notices that the cable is susceptible to vibrations. He drives the rope at a frequency such that the center of the span goes through the largest amount of motion. What frequency does Sarge drive the rope at
A helicopter is flying horizontally at a speed of 60 m/s and accidentally drops a storage pod from an elevation on 300 m. Neglect air resistance, find what is the total distance the storage pod covers
A 10.54 m × 14.4 m house is built on a 10.6-centimeter thick concrete slab. Determine the heat loss rate through the slab
A machine gun fires 25-g bullets at the rate of 4 bullets per second. What is the average recoil force experienced by the machine gun
A 0.31 kg point mass moving on africtionless horizontal surface is attached to a rubber band whose other end is fixed at point P. The rubber band exertsaforce F = bx toward P,where x is the length of the rubber bandand b is an unknown constant.
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