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A student drops two metallic objects into a 120 g steel container holding 150 g of water at 25°C. One object is a 230 g cube of copper that is initially at 85°C, and the other is a chunk of aluminium that is initially at 5.0°C. To the surprise of the student, the water reaches a final temperature of 25°C, precisely where it started. What is the mass of the aluminium chunk?
a 0.39-kg object connected to a light spring with a force constant of 20.2 nm oscillates on a frictionless horizontal
The carbon isotope 14-C is used for carbon dating of archeological artifacts. What is the recoil speed of the nucleus
A plane flies at 1.75 times the speed of sound. Its sonic boom reaches a man on the ground 1.00 min after the plane passes directly overhead
A metallic sphere 1 of radius 1.00 cm is far away from a metallic spherical shell 2 of radius 2.00 cm. What is the initial voltage on 1
A 100 MeV particle decays into two particles. one of these two particles has a mass of 10 MeV and a speed of 3/5. what was the inital particle's speed
Four identical masses of mass 710 kg each are placed at the corners of a square whose side lengths are 15.0 cm. What is the magnitude of net gravitational force on one of the masses, due to the other three.
A variant of the ballistic pendulum consists of a 5.00kg block attached to a string and lying on a frictionless table. What is the angular momentum of the block/bullet after the collision
1. what will you do with the two disks to show that angular momentum is conserved?2. how will you determine the torque
A tank holds a layer of oil, 1.58 m thick, which floats on a layer of syrup that is 0.66 m thick. Both liquids are clear and do not intermix. A ray, The index of refraction of the syrup is closest to:
A system does 112 J of work on its environment and gains 72 J of heat in the process. What is the change in the internal energy of the environment
1. how would the positions of the maxima and minima change if this experiment were done under water? justify your
how long would it take a car to return to its starting place if it traveled 180 ms average speed of 90 kmhr and
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