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The specific heat of water is 4186 J/(kg-degree Celsius) and the specific heat of copper is 387 J/(kg-degree Celsius). 1.20 kg of copper at 200 degrees Celsius is dropped into water at 20.0 degrees Celsius, and the mixture comes to thermal equilibrium at a temperature of 30.0 degrees Celsius. What is the mass of water?
the position of an object moving in a straight line is given by x= 5+3.0t - 40t^2 -20t^3, where x is in meters and t in seconds. a)What is the position of the object at t=1,2,3 and 4 s
q.1. a child complains that her milk is too hot. it is indeed too hot at 90o c. her mother pours 70 g of cold milk at
For each of the currents listed in table 2, and using the inductance of the coil found by experiment, determine the total stored energies in the coil
A system does 4.30 104 J of work, and 7.00 104 J of heat flows into the system during the process. Find the change in the internal energy of the system
A straight wire segment 4 m long makes an angle of 30° with a uniform magnetic field of 0.37 T. Find the magnitude of the force on the wire
An engine absorbs 1698 J from a hot reservoir and expels 1205 J to a cold reservoir in each cycle. How much work is done in each cycle
A roach that runs for its life because you try to hit it with your physics book runs off the horizontal tabletop with a speed of 0.64 m/s. Find the height of the table
One particle has a mass of 2.00 10-3 kg and a charge of +9 µC. A second particle has a mass of 5.00 10-3 kg and the same charge. The two particles are initially held in place and then released. The particles fly apart, and when the separation between..
Two identical objects each hold a net charge of q = 9e. If the gravitational force between the two objects exactly cancels the electrostatic force between the objects, what is the mass of each object
A copper pot sits on a hot plate that is at a remperature of 140 C, How long before one half the pots contents evaporate
You're driving down the highway late one night at 17 {rm m}/{rm s} when a deer steps onto the road 45 {rm m} in front of you. Your reaction time before stepping on the brakes is 0.50 {rm s} and the maximum deceleration of your car is 12 {rm m/s^2}..
q1. a lightning bolt transfers 6.0 coulombs of charge from a cloud to the ground in 2.0 10-3 second. what is the
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