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A large, cold (1.20 C) block of iron is immersed in a tub of hot (99.7C) water. In the first 10.0s, 10.0 kcal of heat are transferred, although the temperatures of the water and the iron do not change much in this time. Calculate the change in entropy of the system this time. Ans in cal/K.
An object weighing 335 N in air is immersed in water after being tied to a string connected to a balance. Find the density of the oil
A slit 0.240mm wide is illuminated by parallel light rays with a wavelength 540nm. What is the distance on the screen from the center of the central maximum to the first minimum
There has long been an interest in using the vast quantities of thermal energy in the oceans to run heat engines. What is the maximum possible efficiency of such a power plant
a duck and a guy named john are sitting on opposite sides of a large merry go round that is rotating clockwise. Describe the motion of the coconut viewed by the students
A small sphere with a mass of 1.0 g is suspended at the end of an insulating string of length 50 cm within a uniform horizontal electric eld of 12,000 N/C. What is the value of the charge on the small sphere
In a television tube, electrons travel down the tube and strike the fluorescent material at the end of the tube. Their impact with this material causes light to be emitted, How long does the acceleration take
A torsion pendulum is constructed of a copper rod of radius 3 mm and length 50 cm. what is the period of oscillation
A vertical straight wire carrying an upward26-A current exerts an attractive force per unit length of 7.3×10?4N/m, What is the direction of the current in the second wire?
The coefficient of static friction between m1 and the horizontal surface is 0.60 while the coefficient of kinetic friction is 0.30. what will be the acceleration of the system
What is the energy density in the electric field at the surface of a 2.90-cm-diameter sphere charged to a potential of 1000V
Three charged particles are placed at each of three corners of an equilateral triangle whose sides are of length 4.0 cm. What is the net electric force acting on particle 3
A 2kg ball traveling to the right with a speed of 4 m/s collides with a 4 kg ball traveling to the left with a speed of 2 m/s. The total momentum of the two balls after the collision is what.
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