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A 98-g piece of copper is heated in a furnace to a temperature tC. The copper is then inserted into a 150-g copper calorimeter containing 207 g of water. The initial temperature of the water and calorimeter is 16°C, and the final temperature after equilibrium is established is 38° C. When the calorimeter and its contents are weighed, 1.2 g of water are found to have evaporated. What was the temperature tC?
consider a hot-air balloon. the deflated balloon gondola and 2 passengers have a combined mass of 315 kg. when inflated
A 0.70kg piece of lead at a temperature of 160C is dumped into 800mL of water at a temperature of 22C , How much heat flowed in this process
A worker pushed a 65.0-kg block 10.0 m along a level floor at a constant speed with a force directed 39.0° below the horizontal. how much work did the worker do on the block
what uniform magnetic field applied perpendicular to a beam of electrons moving at 3.59 x 106 ms is required to make
As measured in an inertial coordinate system S, what are the initial velocities of the protons measured in an inertial coordinate system S' in standard orientation and moving as speed V=0.9c relative to S
a pendulum sweeps out an angle of 12.5 during its motion. how far does the pendulum bob the ball at the end of the rope
A newly discovered planet has a mean radius of 5370 km. A vehicle on the planet\'s surface is moving in the same direction as the planet\'s rotation, what is the period of the planet\'s rotation
In what direction should the aircraft head?
An energy storage system based on a flywheel (a rotating disk) can store a maximum of 3.2 MJ, What is the moment of inertia of the flywheel
Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. What is the acceleration of the yellow car
professional baseball pitchers can deliver a pitch which can reach the blazing speed of 100 mph miles per hour. a local
A thin rod L meters long has a linera density that varies as \(\rho (x) = \rho_{0} e^{-ax}\). Find the mass of the rod
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